/* ═══════════════════════════════════════════════════════════════
pullh — Terminal × Editorial Design System
   Aesthetic: Code Editor meets Tech Magazine
   ═══════════════════════════════════════════════════════════════ */


/* ── TOKENS — Stripe/Vercel inspired ────────────────────────── */
:root {
  /* Background — clean, deep, minimal */
  --bg-base:    #070b14;
  --bg-raised:  #111827;
  --bg-overlay: #1a2234;
  --bg-glass:   rgba(17, 24, 39, 0.85);

  /* Borders — subtle but visible */
  --border-subtle: rgba(255,255,255,0.06);
  --border-muted:  rgba(255,255,255,0.10);
  --border-strong: rgba(255,255,255,0.18);

  /* Language accent colors */
  --kotlin-hue: 270;
  --python-hue: 210;
  --go-hue:     194;
  --php-hue:    225;
  --javascript-hue: 49;
  --typescript-hue: 211;
  --csharp-hue: 274;
  --cpp-hue:     215;
  --rust-hue:    18;
  --java-hue:   35;

  --kotlin: hsl(270,80%,68%);
  --python: hsl(210,75%,62%);
  --go:     hsl(194,90%,55%);
  --php:    hsl(225,72%,66%);
  --javascript: hsl(49,95%,62%);
  --typescript: hsl(211,88%,60%);
  --csharp: hsl(274,70%,64%);
  --cpp: hsl(215,82%,68%);
  --rust: hsl(18,80%,60%);
  --java:   hsl(35,95%,60%);

  /* Semantic — brighter, more accessible */
  --accent:   #34d399;   /* emerald — Vercel-style */
  --accent2:  #f472b6;   /* pink */
  --warn:     #fbbf24;
  --danger:   #f87171;

  /* Text — WCAG AA contrast on #070b14 */
  --txt-primary:   #FFFFFF;
  --txt-secondary: #B9C0CC;
  --txt-muted:     #8892A6;
  --txt-code:      #e2e8f0;

  /* Typography — CJK fallbacks for ko/ja/zh support */
  --font-display: 'Epilogue', 'Apple SD Gothic Neo', 'Malgun Gothic', 'Noto Sans KR', 'Noto Sans JP', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-serif:   'Instrument Serif', 'Noto Serif KR', 'Noto Serif JP', 'Batang', serif;
  --font-mono:    'DM Mono', 'D2Coding', monospace;

  /* Spacing scale */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10: 40px;
  --sp-12: 48px; --sp-16: 64px;

  /* Radius */
  --r-sm: 6px; --r-md: 10px; --r-lg: 16px; --r-xl: 24px;

  /* Transitions */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --t-fast: 120ms; --t-med: 220ms; --t-slow: 380ms;
}

/* ── RESET ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }
body {
  font-family: var(--font-display);
  background: var(--bg-base);
  color: var(--txt-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body.mobile-menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, select, textarea { font-family: inherit; }
img { max-width: 100%; display: block; }

/* ── SCROLLBAR ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }

/* ── GRAIN OVERLAY — removed for cleaner look ──────────────── */
/* Grain disabled — Stripe/Vercel style prefers clean backgrounds */

/* ── NAV ─────────────────────────────────────────────────────── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 var(--sp-6);
  background: rgba(7,11,20,0.92);
  backdrop-filter: blur(20px) saturate(150%);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  width: 100%; max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  min-width: 0;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--txt-primary);
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}
.nav-logo .logo-mark {
  width: 28px; height: 28px;
  background: var(--accent);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 500;
  color: #000;
}
.nav-logo .logo-text em {
  font-style: normal;
  color: var(--accent);
}
.nav-divider {
  width: 1px; height: 20px;
  background: var(--border-subtle);
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: var(--sp-1);
  list-style: none;
  flex: 1;
  min-width: 0;
  align-items: center;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-links li {
  flex: 0 0 auto;
  min-width: max-content;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--txt-secondary);
  letter-spacing: 0.2px;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.06); }
.nav-links a.active { color: var(--accent); border-bottom: 2px solid var(--accent); border-radius: var(--r-sm) var(--r-sm) 0 0; }
.nav-links a .nav-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ── NAV CONTROLS ───────────────────────────────────────────── */
.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-left: auto;
  flex-shrink: 0;
}
.nav-link-programming { display: none; }

/* ── LANGUAGE SELECTOR ──────────────────────────────────────── */
.lang-select {
  appearance: none;
  -webkit-appearance: none;
  padding: 5px 24px 5px 8px;
  background: var(--bg-overlay) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6' fill='%238888aa'/%3E%3C/svg%3E") no-repeat right 8px center;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  color: var(--txt-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
  flex-shrink: 0;
}
.lang-select:hover { border-color: var(--border-muted); color: var(--txt-primary); }
.lang-select:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.lang-select option { background: var(--bg-base); color: var(--txt-primary); }

/* ── HAMBURGER BUTTON ───────────────────────────────────────── */
.hamburger-btn {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
  min-width: 36px;
  min-height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 510;
}
.hamburger-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--txt-secondary);
  border-radius: 1px;
  transition: all var(--t-fast) var(--ease);
}
.mobile-menu-open .hamburger-btn span:nth-child(1) { transform: rotate(45deg) translate(3px, 4px); }
.mobile-menu-open .hamburger-btn span:nth-child(2) { opacity: 0; }
.mobile-menu-open .hamburger-btn span:nth-child(3) { transform: rotate(-45deg) translate(3px, -4px); }

/* ── SEARCH TRIGGER ──────────────────────────────────────────── */
.nav-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 6px 12px;
  min-height: 36px;
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  color: var(--txt-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  transition: all var(--t-fast) var(--ease);
  cursor: pointer;
}
.nav-search-btn:hover {
  border-color: var(--border-muted);
  color: var(--txt-secondary);
}
.nav-search-btn kbd {
  padding: 1px 5px;
  background: var(--bg-raised);
  border: 1px solid var(--border-muted);
  border-radius: 4px;
  font-size: 0.72rem;
}

/* ── PAGE WRAPPER ────────────────────────────────────────────── */
#app {
  padding-top: 56px;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

/* ── HERO ────────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: var(--sp-16) var(--sp-6) var(--sp-12);
  overflow: hidden;
}
/* Decorative grid — very subtle */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 0%, black 20%, transparent 100%);
  opacity: 0.5;
}
/* Glow — subtle emerald */
.hero::after {
  content: '';
  position: absolute;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 700px; height: 400px;
  background: radial-gradient(ellipse, rgba(52,211,153,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  z-index: 1;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.5px;
  margin-bottom: var(--sp-6);
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(52,211,153,0.2);
  background: rgba(52,211,153,0.08);
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.hero-h1 {
  font-size: clamp(3rem, 8vw, 92px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: var(--sp-6);
  max-width: 14ch;
  color: #FFFFFF;
}
/* CJK: exclude Epilogue entirely — it renders Korean/Japanese/Chinese as tofu */
[lang="ko"] .hero-h1,
[lang="ja"] .hero-h1,
[lang="zh"] .hero-h1 {
  font-family: 'Noto Sans KR', 'Noto Sans JP', 'Noto Sans SC', 'Apple SD Gothic Neo', 'Malgun Gothic', 'Hiragino Sans', 'Microsoft YaHei', sans-serif !important;
  letter-spacing: -1px;
}
.hero-h1 .serif {
  font-family: 'Instrument Serif', 'Noto Serif KR', 'Noto Sans JP', 'Batang', serif;
  font-style: italic;
  font-weight: 400;
  letter-spacing: -1px;
}
/* For CJK languages, serif italic looks odd — use normal style */
[lang="ko"] .hero-h1 .serif,
[lang="ja"] .hero-h1 .serif,
[lang="zh"] .hero-h1 .serif {
  font-style: normal;
  font-family: 'Noto Sans KR', 'Noto Sans JP', 'Noto Sans SC', 'Apple SD Gothic Neo', 'Malgun Gothic', 'Microsoft YaHei', sans-serif !important;
  font-weight: 700;
}
.hero-h1 .accent-text {
  background: linear-gradient(135deg, #34d399, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.12rem;
  color: #B9C0CC;
  max-width: 52ch;
  line-height: 1.75;
  margin-bottom: var(--sp-10);
}
.hero-stats {
  display: flex;
  gap: var(--sp-8);
  flex-wrap: wrap;
}
.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-stat-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
}
.hero-stat-num span { color: var(--accent); }
.hero-stat-label {
  font-size: 0.82rem;
  color: #8892A6;
  letter-spacing: 0.3px;
}

/* Lang pills in hero */
.hero-langs {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-8);
  flex-wrap: wrap;
}
.hero-lang-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 8px 16px;
  min-height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.05);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: #e2e8f0;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.hero-lang-pill:hover {
  background: rgba(52,211,153,0.12);
  border-color: var(--accent);
  color: #fff;
}
.hero-lang-pill.kotlin  { --lc: var(--kotlin); }
.hero-lang-pill.python  { --lc: var(--python); }
.hero-lang-pill.go      { --lc: var(--go); }
.hero-lang-pill.php     { --lc: var(--php); }
.hero-lang-pill.javascript { --lc: var(--javascript); }
.hero-lang-pill.typescript { --lc: var(--typescript); }
.hero-lang-pill.csharp     { --lc: var(--csharp); }
.hero-lang-pill.cpp        { --lc: var(--cpp); }
.hero-lang-pill.rust       { --lc: var(--rust); }
.hero-lang-pill.java    { --lc: var(--java); }
.hero-lang-pill .pill-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--lc);
  box-shadow: 0 0 6px var(--lc);
}
.hero-lang-pill .pill-count {
  color: var(--txt-muted);
  font-size: 0.72rem;
}
.hero-langs-mobile { display: none; }
.home-hero {
  padding-top: calc(var(--sp-14) + 8px);
}
.home-hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: clamp(24px, 4vw, 68px);
  align-items: start;
}
.home-hero-copy {
  min-width: 0;
}
.home-hero-copy .hero-sub {
  margin-bottom: var(--sp-8);
}
.home-track-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 2vw, 26px);
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,0.08);
  background:
    radial-gradient(circle at top right, rgba(34,211,238,0.16), transparent 30%),
    linear-gradient(180deg, rgba(14,18,29,0.95), rgba(10,14,22,0.98));
  box-shadow: 0 22px 48px rgba(0,0,0,0.24);
}
.home-track-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(140deg, rgba(255,255,255,0.06), transparent 24%),
    linear-gradient(180deg, transparent, rgba(255,255,255,0.02));
}
.home-track-panel > * {
  position: relative;
  z-index: 1;
}
.home-track-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}
.home-track-panel-kicker,
.home-track-panel-stat span,
.hero-track-card-pill,
.hero-track-card-count {
  font-family: var(--font-mono);
}
.home-track-panel-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.home-track-panel-kicker::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}
.home-track-panel-title {
  margin: 10px 0 0;
  font-size: clamp(1.05rem, 1.6vw, 1.45rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}
.home-track-panel-desc {
  margin: 8px 0 0;
  max-width: 42ch;
  color: var(--txt-secondary);
  font-size: 0.8rem;
  line-height: 1.5;
}
.home-track-panel-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 92px;
  padding: 10px 12px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
}
.home-track-panel-stat strong {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
}
.home-track-panel-stat span {
  color: var(--txt-muted);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.home-track-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.hero-track-card {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgb(var(--card-accent-rgb, 52 211 153) / 0.16);
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  padding: 12px 14px;
  text-align: left;
  cursor: pointer;
  transition:
    transform var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    box-shadow var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease);
}
.hero-track-card::after {
  content: '';
  position: absolute;
  inset: auto -14% -46% auto;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(var(--card-accent-rgb, 52 211 153) / 0.18), transparent 70%);
  pointer-events: none;
}
.hero-track-card:hover {
  transform: translateY(-3px);
  border-color: rgb(var(--card-accent-rgb, 52 211 153) / 0.28);
  box-shadow: 0 18px 30px rgba(0,0,0,0.20);
}
.hero-track-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-2);
}
.hero-track-card-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--txt-primary);
}
.hero-track-card-icon {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgb(var(--card-accent-rgb, 52 211 153) / 0.14);
  box-shadow: inset 0 0 0 1px rgb(var(--card-accent-rgb, 52 211 153) / 0.12);
}
.hero-track-card-count {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgb(var(--card-accent-rgb, 52 211 153) / 0.18);
  background: rgb(var(--card-accent-rgb, 52 211 153) / 0.10);
  color: rgb(var(--card-accent-rgb, 52 211 153) / 0.95);
  font-size: 0.66rem;
  white-space: nowrap;
}
.hero-track-card-desc {
  margin-top: 8px;
  color: var(--txt-secondary);
  font-size: 0.74rem;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── SECTION ─────────────────────────────────────────────────── */
.section {
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--sp-12) var(--sp-6);
}
.section + .section { padding-top: 0; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-4);
  margin-bottom: var(--sp-8);
}
.section-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.8px;
}
.section-title-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.5rem;
  letter-spacing: -0.5px;
}
.section-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--txt-muted);
}
.section-rule {
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}
.section-action {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: opacity var(--t-fast);
}
.section-action:hover { opacity: 0.7; }

/* ── LANG TAB BAR ────────────────────────────────────────────── */
.lang-tabbar {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-6);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0;
}
.lang-tab {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 10px 18px;
  border-radius: var(--r-sm) var(--r-sm) 0 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--txt-secondary);
  cursor: pointer;
  border: 1px solid transparent;
  border-bottom: none;
  margin-bottom: -1px;
  transition: all var(--t-fast) var(--ease);
  position: relative;
}
.lang-tab:hover { color: var(--txt-primary); background: var(--bg-raised); }
.lang-tab[data-active] {
  color: var(--txt-primary);
  background: var(--bg-raised);
  border-color: var(--border-subtle);
}
/* colored underline on active */
.lang-tab[data-active]::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 2px;
  background: var(--lc, var(--accent));
  border-radius: 2px 2px 0 0;
}
.lang-tab .tab-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--lc, var(--txt-muted));
  box-shadow: 0 0 5px var(--lc, transparent);
}
.lang-tab .tab-count {
  font-size: 0.7rem;
  color: var(--txt-muted);
  background: var(--bg-overlay);
  padding: 1px 6px;
  border-radius: 100px;
}

/* ── CONTENT LAYOUT ──────────────────────────────────────────── */
.content-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--sp-4);
  min-height: 70vh;
}
.ai-content-grid {
  grid-template-columns: minmax(300px, 340px) 1fr;
  align-items: start;
}
.vibe-content-grid {
  grid-template-columns: minmax(300px, 360px) 1fr;
  align-items: start;
}

/* ── SIDEBAR ─────────────────────────────────────────────────── */
.sidebar {
  position: sticky;
  top: calc(56px + var(--sp-4));
  height: calc(100vh - 80px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, rgba(17,24,39,0.98), rgba(8,14,28,0.98));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  box-shadow: 0 18px 40px rgba(0,0,0,0.2);
}
.sidebar-search {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
}
.sidebar-search input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--txt-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.sidebar-search input::placeholder { color: var(--txt-muted); }

.sidebar-cats {
  display: flex;
  gap: var(--sp-1);
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}
.cat-chip {
  padding: 3px 9px;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--txt-muted);
  background: var(--bg-overlay);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--t-fast);
}
.cat-chip:hover { color: var(--txt-secondary); border-color: var(--border-subtle); }
.cat-chip.active { color: var(--accent); border-color: rgba(79,255,176,0.3); background: rgba(79,255,176,0.06); }

.sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-2);
}
.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 11px var(--sp-3);
  border-radius: 14px;
  border: 1px solid transparent;
  background: rgba(255,255,255,0.01);
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
  position: relative;
}
.sidebar-item:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.08);
}
.sidebar-item.active {
  background: linear-gradient(180deg, color-mix(in srgb, var(--lc, var(--accent)) 14%, rgba(255,255,255,0.02)), rgba(255,255,255,0.02));
  border-color: color-mix(in srgb, var(--lc, var(--accent)) 24%, rgba(255,255,255,0.08));
  box-shadow: 0 12px 28px rgba(0,0,0,0.16);
}
.sidebar-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 6px; bottom: 6px;
  width: 3px;
  background: var(--lc, var(--accent));
  border-radius: 0 2px 2px 0;
}
.si-title {
  flex: 1;
  font-size: 0.82rem;
  color: var(--txt-secondary);
  line-height: 1.45;
  white-space: normal;
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.sidebar-item.active .si-title { color: var(--txt-primary); }
.si-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 3px 7px;
  border-radius: 999px;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.08);
}
.si-stack {
  display: flex;
  flex: 1;
  min-width: 0;
  flex-direction: column;
  gap: 4px;
}
.si-badge.b { background: rgba(79,255,176,0.1); color: #4fffb0; }
.si-badge.i { background: rgba(255,204,79,0.1); color: #ffcc4f; }
.si-badge.a { background: rgba(255,79,79,0.1);  color: #ff4f4f; }
.ai-sidebar {
  min-height: 70vh;
}
.vibe-sidebar {
  min-height: 70vh;
}
.ai-sidebar-footer {
  display: flex;
  align-items: center;
}
.vibe-sidebar-footer {
  display: flex;
  align-items: center;
}
.ai-sidebar-footer .filter-total {
  margin-left: 0;
}
.vibe-sidebar-footer .filter-total {
  margin-left: 0;
}
.ai-list-item {
  align-items: flex-start;
  padding-top: 12px;
  padding-bottom: 12px;
}
.vibe-list-item {
  align-items: flex-start;
  padding-top: 12px;
  padding-bottom: 12px;
}
.ai-list-summary {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  font-size: 0.75rem;
  line-height: 1.65;
  color: var(--txt-muted);
}
.ai-list-item.active .ai-list-summary {
  color: var(--txt-secondary);
}
.vibe-list-item.active .vibe-list-summary {
  color: var(--txt-secondary);
}
.ai-num {
  margin-top: 2px;
  padding: 3px 7px;
  border: 1px solid rgba(79,255,176,0.18);
  background: rgba(79,255,176,0.1);
  color: #4fffb0;
}
.vibe-list-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.vibe-list-pill,
.vibe-list-kicker,
.vibe-num {
  font-family: var(--font-mono);
}
.vibe-list-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 0.67rem;
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.96);
  border: 1px solid rgb(var(--vibe-rgb, 244 114 182) / 0.18);
  background: rgb(var(--vibe-rgb, 244 114 182) / 0.10);
}
.vibe-list-kicker {
  font-size: 0.67rem;
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.82);
}
.vibe-list-summary {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  font-size: 0.75rem;
  line-height: 1.65;
  color: var(--txt-muted);
}
.vibe-num {
  margin-top: 2px;
  padding: 3px 7px;
  border: 1px solid rgb(var(--vibe-rgb, 244 114 182) / 0.18);
  background: rgb(var(--vibe-rgb, 244 114 182) / 0.10);
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.98);
}

.sidebar-footer {
  padding: var(--sp-3);
  border-top: 1px solid var(--border-subtle);
}
.sidebar-pager {
  display: flex;
  gap: var(--sp-2);
  justify-content: center;
}
.pager-btn {
  padding: 5px 12px;
  border-radius: var(--r-sm);
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--txt-secondary);
  transition: all var(--t-fast);
}
.pager-btn:hover { border-color: var(--border-muted); color: var(--txt-primary); }
.pager-btn.active { background: var(--accent); border-color: var(--accent); color: #000; font-weight: 500; }

/* ── DETAIL PANEL ────────────────────────────────────────────── */
.detail-panel {
  background: linear-gradient(180deg, rgba(17,24,39,0.98), rgba(8,14,28,0.98));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  scroll-margin-top: 72px;
  box-shadow: 0 22px 48px rgba(0,0,0,0.22);
}
.ai-detail-panel .detail-body {
  min-height: 460px;
}
.vibe-detail-panel .detail-body {
  min-height: 460px;
}
.detail-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: var(--sp-4);
  color: var(--txt-muted);
  min-height: 400px;
}
.detail-empty .empty-icon {
  font-size: 3rem;
  opacity: 0.3;
}
.detail-empty p { font-size: 0.85rem; }

.detail-header {
  padding: var(--sp-6) var(--sp-8);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: linear-gradient(to bottom, var(--bg-overlay), var(--bg-raised));
  position: relative;
  overflow: hidden;
}
/* Lang color bar */
.detail-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--lc, var(--accent));
  opacity: 0.8;
}
.detail-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--txt-muted);
  margin-bottom: var(--sp-2);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.detail-breadcrumb span { color: var(--lc, var(--accent)); }
.detail-header::after {
  content: '';
  position: absolute;
  top: -88px;
  right: -64px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--lc, var(--accent)) 18%, transparent), transparent 70%);
  pointer-events: none;
}
.detail-h2 {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: var(--sp-2);
}
.detail-sub {
  max-width: 60ch;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--txt-secondary);
}
.detail-header-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.detail-header-copy {
  flex: 1;
}
.detail-header-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
  margin-top: 4px;
}
.detail-tags { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.dtag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 3px 9px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  color: var(--txt-muted);
}
.dtag.diff-b { color: #4fffb0; border-color: rgba(79,255,176,0.25); background: rgba(79,255,176,0.05); }
.dtag.diff-i { color: #ffcc4f; border-color: rgba(255,204,79,0.25); background: rgba(255,204,79,0.05); }
.dtag.diff-a { color: #ff6f6f; border-color: rgba(255,79,79,0.25); background: rgba(255,79,79,0.05); }

.detail-body {
  padding: var(--sp-8);
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}
.detail-section {
  position: relative;
  margin: 0;
  padding: var(--sp-5);
  border-radius: 20px;
  border: 1px solid color-mix(in srgb, var(--lc, var(--accent)) 14%, rgba(255,255,255,0.06));
  background: linear-gradient(180deg, color-mix(in srgb, var(--lc, var(--accent)) 8%, rgba(255,255,255,0.02)), rgba(255,255,255,0.01));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}
.detail-section::before {
  content: '';
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--lc, var(--accent)) 72%, transparent), transparent 82%);
  opacity: 0.6;
}
.detail-section-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--txt-muted);
  margin-bottom: var(--sp-4);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.detail-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}
.detail-related-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.detail-accordion {
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  background: rgba(255,255,255,0.02);
  overflow: hidden;
}
.detail-accordion-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}
.detail-accordion-summary::-webkit-details-marker {
  display: none;
}
.detail-accordion-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--txt-muted);
}
.detail-accordion-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  padding: 0 9px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(255,255,255,0.04);
  color: var(--txt-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1;
}
.detail-accordion[open] .detail-accordion-hint {
  color: var(--accent);
  border-color: rgba(79,255,176,0.18);
  background: rgba(79,255,176,0.08);
}
.detail-accordion-body {
  padding: 0 var(--sp-4) var(--sp-4);
}
.detail-accordion-body .code-block {
  margin-top: 2px;
}
.detail-desc {
  color: var(--txt-secondary);
  font-size: 0.94rem;
  line-height: 1.84;
  word-break: keep-all;
}
.detail-desc strong { color: var(--txt-primary); }
.detail-desc code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--accent);
}

/* ── CODE BLOCK ──────────────────────────────────────────────── */
.code-block {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: #070712;
}
.code-block-header {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  background: var(--bg-overlay);
  border-bottom: 1px solid var(--border-subtle);
  gap: var(--sp-3);
}
.code-dots {
  display: flex;
  gap: 5px;
}
.code-dots span {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.code-dots .d1 { background: #ff5f56; }
.code-dots .d2 { background: #ffbd2e; }
.code-dots .d3 { background: #27c93f; }
.code-lang-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--lc, var(--txt-muted));
  letter-spacing: 0.3px;
  flex: 1;
}
.code-copy-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--txt-muted);
  padding: 4px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-raised);
  transition: all var(--t-fast);
}
.code-copy-btn:hover { color: var(--accent); border-color: rgba(79,255,176,0.3); }
.code-copy-btn.copied { color: #4fffb0; border-color: rgba(79,255,176,0.4); }
.code-block pre {
  padding: var(--sp-5) var(--sp-6);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--txt-code);
  tab-size: 2;
  background: #0d1117;
}
/* highlight.js override to use our code block style */
.code-block pre code,
.code-block pre code.hljs {
  display: block;
  color: #e6edf3;
  background: transparent;
  padding: 0;
}
[data-theme="light"] .code-block pre code,
[data-theme="light"] .code-block pre code.hljs {
  color: #1f2328;
}

[data-theme="dark"] .code-block .hljs,
[data-theme="dark"] .code-block .hljs-subst,
[data-theme="dark"] .code-block .hljs-function,
[data-theme="dark"] .code-block .hljs-formula,
[data-theme="dark"] .code-block .hljs-params {
  color: #e6edf3;
}
[data-theme="dark"] .code-block .hljs-comment,
[data-theme="dark"] .code-block .hljs-quote {
  color: #8b949e;
  font-style: italic;
}
[data-theme="dark"] .code-block .hljs-keyword,
[data-theme="dark"] .code-block .hljs-selector-tag,
[data-theme="dark"] .code-block .hljs-doctag,
[data-theme="dark"] .code-block .hljs-name {
  color: #ff7b72;
}
[data-theme="dark"] .code-block .hljs-string,
[data-theme="dark"] .code-block .hljs-regexp,
[data-theme="dark"] .code-block .hljs-meta .hljs-string {
  color: #a5d6ff;
}
[data-theme="dark"] .code-block .hljs-number,
[data-theme="dark"] .code-block .hljs-literal,
[data-theme="dark"] .code-block .hljs-symbol,
[data-theme="dark"] .code-block .hljs-bullet {
  color: #79c0ff;
}
[data-theme="dark"] .code-block .hljs-title,
[data-theme="dark"] .code-block .hljs-title.class_,
[data-theme="dark"] .code-block .hljs-title.function_,
[data-theme="dark"] .code-block .hljs-section,
[data-theme="dark"] .code-block .hljs-selector-id {
  color: #d2a8ff;
}
[data-theme="dark"] .code-block .hljs-type,
[data-theme="dark"] .code-block .hljs-built_in,
[data-theme="dark"] .code-block .hljs-tag,
[data-theme="dark"] .code-block .hljs-selector-class,
[data-theme="dark"] .code-block .hljs-attribute {
  color: #7ee787;
}
[data-theme="dark"] .code-block .hljs-variable,
[data-theme="dark"] .code-block .hljs-property,
[data-theme="dark"] .code-block .hljs-operator,
[data-theme="dark"] .code-block .hljs-punctuation,
[data-theme="dark"] .code-block .hljs-meta,
[data-theme="dark"] .code-block .hljs-link {
  color: #ffa657;
}
/* Syntax highlighting */
.kw  { color: #c792ea; }
.fn  { color: #82aaff; }
.str { color: #c3e88d; }
.num { color: #f78c6c; }
.cm  { color: #546e7a; font-style: italic; }
.ty  { color: #ffcb6b; }
.op  { color: #89ddff; }
.pk  { color: #4fffb0; }
.an  { color: #f07178; }

/* ── TIP / WARN BOXES ────────────────────────────────────────── */
.info-box {
  border-radius: var(--r-md);
  padding: var(--sp-5) var(--sp-6);
  font-size: 0.88rem;
  line-height: 1.75;
  display: flex;
  gap: var(--sp-3);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}
.info-box .box-icon { flex-shrink: 0; font-size: 1rem; margin-top: 1px; }
.info-box.tip  { background: rgba(79,255,176,0.05); border: 1px solid rgba(79,255,176,0.18); color: #7affca; }
.info-box.warn { background: rgba(255,204,79,0.05); border: 1px solid rgba(255,204,79,0.18); color: #ffd87a; }
.info-box.err  { background: rgba(255,79,79,0.05);  border: 1px solid rgba(255,79,79,0.18);  color: #ff9090; }

/* ── COMPARE TABLE ───────────────────────────────────────────── */
.compare-table-wrap { overflow-x: auto; border-radius: var(--r-md); border: 1px solid var(--border-subtle); }
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}
.compare-table th {
  background: var(--bg-overlay);
  padding: 10px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--txt-muted);
  border-bottom: 1px solid var(--border-subtle);
}
.compare-table td {
  padding: 10px 16px;
  color: var(--txt-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.02);
  vertical-align: top;
  line-height: 1.5;
}
.compare-table td:first-child { color: var(--txt-primary); font-weight: 600; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:hover td { background: rgba(255,255,255,0.015); }
.compare-filter-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--txt-muted);
  margin-right: 8px;
  white-space: nowrap;
  flex-shrink: 0;
}
.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--sp-4);
}
.compare-card {
  --card-accent-rgb: 52 211 153;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(17,24,39,0.98), rgba(9,14,28,0.98));
  border: 1px solid rgb(var(--card-accent-rgb) / 0.18);
  border-radius: 20px;
  box-shadow: 0 18px 42px rgba(0,0,0,0.2);
}
.compare-card::after {
  content: '';
  position: absolute;
  top: -70px;
  right: -52px;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(var(--card-accent-rgb) / 0.16) 0%, transparent 70%);
  pointer-events: none;
}
.compare-card-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid rgb(var(--card-accent-rgb) / 0.14);
  background: rgb(var(--card-accent-rgb) / 0.10);
}
.compare-lang {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--lc, var(--accent));
}
.compare-card-title {
  margin-top: 6px;
  font-size: 1rem;
  font-weight: 750;
  line-height: 1.35;
  color: var(--txt-primary);
}
.compare-card-code {
  border: none;
  border-radius: 0;
  position: relative;
  z-index: 1;
}
.compare-card-code pre {
  max-height: 280px;
  overflow-y: auto;
  font-size: 0.76rem;
}
.compare-card-tip {
  position: relative;
  z-index: 1;
  padding: var(--sp-4) var(--sp-5);
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.8rem;
  line-height: 1.72;
  color: var(--txt-secondary);
}
.compare-card-empty {
  display: flex;
  min-height: 220px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--sp-3);
  border-style: dashed;
  color: var(--txt-muted);
  text-align: center;
  padding: var(--sp-8);
}
.compare-card-empty-text {
  font-size: 0.88rem;
  line-height: 1.7;
}
.related-btn {
  display: inline-flex;
  align-items: center;
  min-width: 220px;
  justify-content: flex-start;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  color: var(--txt-secondary);
  font-family: var(--font-display);
  font-size: 0.84rem;
  line-height: 1.55;
  transition: transform var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}
.related-btn:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--lc, var(--accent)) 26%, rgba(255,255,255,0.08));
  background: color-mix(in srgb, var(--lc, var(--accent)) 10%, rgba(255,255,255,0.03));
  color: var(--txt-primary);
}
.programming-empty-state {
  --card-accent-rgb: 52 211 153;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: clamp(24px, 3vw, 36px);
  border-radius: 24px;
  border: 1px solid rgb(var(--card-accent-rgb) / 0.18);
  background:
    radial-gradient(circle at top right, rgb(var(--card-accent-rgb) / 0.18), transparent 36%),
    linear-gradient(180deg, rgba(17,24,39,0.98) 0%, rgba(9,14,28,0.98) 100%);
  box-shadow: 0 20px 48px rgba(0,0,0,0.26);
}
.programming-empty-state::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, rgb(var(--card-accent-rgb) / 0.9), transparent 82%);
}
.programming-empty-state > * {
  position: relative;
  z-index: 1;
}
.programming-empty-visual {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.programming-empty-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: rgb(var(--card-accent-rgb) / 0.12);
  border: 1px solid rgb(var(--card-accent-rgb) / 0.22);
  color: rgb(var(--card-accent-rgb) / 0.95);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
}
.programming-empty-kicker {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgb(var(--card-accent-rgb) / 0.18);
  background: rgb(var(--card-accent-rgb) / 0.10);
  color: rgb(var(--card-accent-rgb) / 0.96);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.programming-empty-copy {
  max-width: 62ch;
}
.programming-empty-title {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  line-height: 1.2;
  color: var(--txt-primary);
}
.programming-empty-desc {
  margin-top: var(--sp-3);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--txt-secondary);
}
.programming-empty-pills,
.programming-empty-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* ── CARD GRID ───────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-4);
}
.card {
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  cursor: pointer;
  transition: all var(--t-med) var(--ease);
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--lc, var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med) var(--ease);
}
.card:hover::before { transform: scaleX(1); }
.card:hover {
  border-color: rgba(52,211,153,0.3);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.card-icon { font-size: 2rem; margin-bottom: var(--sp-3); }
.card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: var(--sp-2); color: #fff; }
.card-desc { font-size: 0.88rem; color: #B9C0CC; line-height: 1.65; }
.card-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.card-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--lc, var(--accent));
  background: rgba(79,255,176,0.06);
  padding: 3px 9px;
  border-radius: 100px;
  border: 1px solid rgba(79,255,176,0.15);
}

/* ── FILTER BAR ──────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  margin-bottom: var(--sp-5);
  flex-wrap: wrap;
}
.filter-chip {
  padding: 5px 12px;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--txt-muted);
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--t-fast);
}
.filter-chip:hover { color: var(--txt-secondary); border-color: var(--border-muted); }
.filter-chip.active { color: var(--accent); border-color: rgba(79,255,176,0.35); background: rgba(79,255,176,0.06); }
.filter-chip.diff-b.active { color: #4fffb0; }
.filter-chip.diff-i.active { color: #ffcc4f; border-color: rgba(255,204,79,0.35); background: rgba(255,204,79,0.06); }
.filter-chip.diff-a.active { color: #ff6f6f; border-color: rgba(255,79,79,0.35); background: rgba(255,79,79,0.06); }
.filter-total { margin-left: auto; font-family: var(--font-mono); font-size: 0.75rem; color: var(--txt-muted); }

/* ── VIBE / AI GRID ──────────────────────────────────────────── */
.item-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--sp-4);
}
.item-card {
  --card-accent-rgb: 52 211 153;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  background: linear-gradient(180deg, rgba(17,24,39,0.96) 0%, rgba(9,14,28,0.98) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: var(--sp-5);
  transition: transform var(--t-med) var(--ease),
              border-color var(--t-med) var(--ease),
              box-shadow var(--t-med) var(--ease),
              background var(--t-med) var(--ease);
  cursor: default;
  box-shadow: 0 16px 40px rgba(0,0,0,0.22);
}
.item-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgb(var(--card-accent-rgb) / 0.8), transparent 80%);
  opacity: 0.75;
}
.item-card::after {
  content: '';
  position: absolute;
  top: -72px;
  right: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(var(--card-accent-rgb) / 0.16) 0%, transparent 70%);
  pointer-events: none;
}
.item-card > * {
  position: relative;
  z-index: 1;
}
.item-card:hover {
  transform: translateY(-5px);
  border-color: rgb(var(--card-accent-rgb) / 0.22);
  background: linear-gradient(180deg, rgba(17,24,39,0.98) 0%, rgba(11,18,34,0.99) 100%);
  box-shadow: 0 22px 46px rgba(0,0,0,0.28);
}
.item-num {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--txt-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.item-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
}
.item-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.item-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(7,11,20,0.42);
  color: var(--txt-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1;
}
.item-pill.tone {
  color: rgb(var(--card-accent-rgb) / 0.98);
  border-color: rgb(var(--card-accent-rgb) / 0.18);
  background: rgb(var(--card-accent-rgb) / 0.10);
}
.item-pill.soft {
  background: rgba(255,255,255,0.04);
}
.item-title {
  position: relative;
  z-index: 1;
  font-size: 1rem;
  font-weight: 750;
  color: var(--txt-primary);
  line-height: 1.4;
}
.item-desc {
  position: relative;
  z-index: 1;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  font-size: 0.83rem;
  color: var(--txt-secondary);
  line-height: 1.72;
}
.item-footer {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-top: auto;
}
.item-arrow {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  color: rgb(var(--card-accent-rgb) / 0.94);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1;
}
.item-cat {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  color: var(--txt-muted);
  border: 1px solid rgba(255,255,255,0.08);
}
.item-card .badge-row { margin-top: auto; }
.item-card.ai-card   { --card-accent-rgb: 52 211 153; }
.item-card.vibe-card { --card-accent-rgb: 244 114 182; }
.item-card.ai-card .item-cat { color: #4fffb0; border-color: rgba(79,255,176,0.2); background: rgba(79,255,176,0.05); }
.item-card.vibe-card .item-cat { color: #ff4faa; border-color: rgba(255,79,170,0.2); background: rgba(255,79,170,0.05); }
.vibe-stage {
  margin-bottom: var(--sp-5);
}
.vibe-spotlight {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.6vw, 32px);
  border-radius: var(--r-lg);
  scroll-margin-top: 72px;
  border: 1px solid rgb(var(--vibe-rgb, 244 114 182) / 0.18);
  background:
    radial-gradient(circle at top right, rgb(var(--vibe-rgb, 244 114 182) / 0.16), transparent 36%),
    linear-gradient(180deg, rgba(14,18,29,0.95) 0%, rgba(10,14,24,0.98) 100%);
  box-shadow: 0 18px 38px rgba(0,0,0,0.22);
}
.vibe-spotlight::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(255,255,255,0.06), transparent 22%),
    linear-gradient(180deg, transparent, rgba(255,255,255,0.02));
  pointer-events: none;
}
.vibe-spotlight-header,
.vibe-spotlight-meta,
.vibe-spotlight-notes {
  position: relative;
  z-index: 1;
}
.vibe-spotlight-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}
.vibe-spotlight-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.vibe-spotlight-kicker,
.vibe-spotlight-serial,
.vibe-spotlight-chip,
.vibe-note-label,
.vibe-card-pill,
.vibe-card-num {
  font-family: var(--font-mono);
}
.vibe-spotlight-kicker,
.vibe-spotlight-serial,
.vibe-spotlight-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  line-height: 1;
}
.vibe-spotlight-kicker {
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.98);
  border: 1px solid rgb(var(--vibe-rgb, 244 114 182) / 0.2);
  background: rgb(var(--vibe-rgb, 244 114 182) / 0.12);
}
.vibe-spotlight-serial,
.vibe-spotlight-chip {
  color: var(--txt-secondary);
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(7,11,20,0.42);
}
.vibe-spotlight-title {
  position: relative;
  z-index: 1;
  margin: 0 0 var(--sp-3);
  font-size: clamp(1.35rem, 2vw, 2rem);
  line-height: 1.14;
  letter-spacing: -0.04em;
}
.vibe-spotlight-desc {
  position: relative;
  z-index: 1;
  max-width: 78ch;
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.82;
  color: var(--txt-secondary);
}
.vibe-spotlight-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}
.vibe-note-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgb(var(--vibe-rgb, 244 114 182) / 0.14);
  background: rgba(7,11,20,0.46);
}
.vibe-note-label {
  font-size: 0.69rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--txt-muted);
}
.vibe-note-card strong {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--txt-primary);
}
.vibe-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.vibe-grid-empty {
  grid-column: 1 / -1;
  padding: 26px;
  border: 1px dashed var(--border-subtle);
  border-radius: var(--r-md);
  color: var(--txt-muted);
  text-align: center;
  font-size: 0.84rem;
}
.vibe-card {
  --card-accent-rgb: var(--vibe-rgb, 244 114 182);
  width: 100%;
  min-height: 208px;
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
  cursor: pointer;
  appearance: none;
  font: inherit;
  color: inherit;
}
.vibe-card.active {
  transform: translateY(-3px);
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.24);
  background: linear-gradient(180deg, rgba(24,16,28,0.98) 0%, rgba(13,12,21,0.98) 100%);
  box-shadow: 0 22px 46px rgba(0,0,0,0.30);
}
.vibe-card:focus-visible {
  outline: 2px solid rgb(var(--vibe-rgb, 244 114 182) / 0.8);
  outline-offset: 2px;
}
.vibe-filter-chip {
  gap: 8px;
}
.vibe-filter-chip-icon,
.vibe-filter-chip-count,
.vibe-card-theme,
.vibe-card-focus {
  font-family: var(--font-mono);
}
.vibe-filter-chip-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  padding: 2px 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  color: var(--txt-muted);
  font-size: 0.66rem;
}
.vibe-filter-chip.active .vibe-filter-chip-count {
  background: rgba(79,255,176,0.10);
  color: var(--accent);
}
.vibe-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
}
.vibe-card-pill,
.vibe-card-num {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.68rem;
  line-height: 1;
}
.vibe-card-pill {
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.98);
  border: 1px solid rgb(var(--vibe-rgb, 244 114 182) / 0.18);
  background: rgb(var(--vibe-rgb, 244 114 182) / 0.10);
}
.vibe-card-num {
  color: var(--txt-muted);
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
}
.vibe-card-title {
  font-size: 0.98rem;
  line-height: 1.38;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.vibe-card-highlight {
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.94);
  font-size: 0.76rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.vibe-card-desc {
  -webkit-line-clamp: 3;
  margin-top: 0;
}
.vibe-card-emphasis {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: auto;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgb(var(--vibe-rgb, 244 114 182) / 0.12);
  background: rgba(7,11,20,0.42);
}
.vibe-card-theme {
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.95);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.vibe-card-focus {
  color: var(--txt-secondary);
  font-size: 0.72rem;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.vibe-card-prompt .vibe-card-emphasis {
  background:
    linear-gradient(180deg, rgb(var(--vibe-rgb, 244 114 182) / 0.14), rgba(7,11,20,0.40));
}
.vibe-card-flow .vibe-card-emphasis {
  border-style: dashed;
}
.vibe-card-build .vibe-card-highlight {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}
.vibe-card-debug {
  border-style: dashed;
}
.vibe-card-debug .vibe-card-emphasis {
  background: rgba(24,14,10,0.46);
}
.vibe-card-refine .vibe-card-theme::before {
  content: '↺';
  margin-right: 8px;
  opacity: 0.72;
}
.vibe-card-lab .vibe-card-emphasis {
  background: rgba(8,18,28,0.46);
}
.vibe-card-docs .vibe-card-title {
  text-decoration: underline;
  text-decoration-color: rgb(var(--vibe-rgb, 244 114 182) / 0.30);
  text-underline-offset: 5px;
}
.vibe-card-blueprint .vibe-card-emphasis {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.02), rgba(7,11,20,0.40)),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0 1px, transparent 1px 12px);
}
.vibe-card-tools .vibe-card-theme::after {
  content: ' stack';
  opacity: 0.72;
}
.vibe-card-mindset .vibe-card-focus {
  font-style: italic;
}
.vibe-spotlight-empty .detail-empty {
  min-height: 220px;
}
.vibe-detail-header .dtag {
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.16);
  background: rgb(var(--vibe-rgb, 244 114 182) / 0.08);
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.92);
}
.vibe-detail-summary {
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}
.vibe-detail-summary::before {
  display: none;
}
.vibe-detail-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3);
}
.home-featured-card .item-title {
  min-height: 2.7em;
}
.home-featured-card .item-desc {
  -webkit-line-clamp: 4;
}

/* ── LOAD MORE ───────────────────────────────────────────────── */
.load-more-wrap { text-align: center; margin-top: var(--sp-8); }
.load-more-wrap.is-hidden { display: none; }
.load-more-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 11px 28px;
  border-radius: var(--r-md);
  background: var(--bg-overlay);
  border: 1px solid var(--border-muted);
  color: var(--txt-secondary);
  font-family: var(--font-mono);
  font-size: 0.83rem;
  transition: all var(--t-fast) var(--ease);
}
.load-more-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(79,255,176,0.05); }

/* ── SEARCH MODAL ────────────────────────────────────────────── */
#search-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 900;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(12px);
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
}
#search-modal.open { display: flex; }
.search-box {
  width: 100%;
  max-width: 660px;
  max-height: 65vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-overlay);
  border: 1px solid var(--border-muted);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
}
.search-input-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-subtle);
}
.search-input-row svg { flex-shrink: 0; opacity: 0.5; }
.search-input-row input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--txt-primary);
  font-family: var(--font-display);
  font-size: 1rem;
}
.search-input-row input::placeholder { color: var(--txt-muted); }
.search-input-row kbd {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 7px;
  border: 1px solid var(--border-muted);
  border-radius: 4px;
  color: var(--txt-muted);
}
.search-results-list { overflow-y: auto; padding: var(--sp-3); }
.search-empty { padding: var(--sp-8); text-align: center; color: var(--txt-muted); font-size: 0.85rem; }
.search-result {
  display: flex;
  gap: var(--sp-3);
  padding: 11px 13px;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background var(--t-fast);
}
.search-result:hover { background: var(--bg-raised); }
.sr-badge {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  height: fit-content;
  margin-top: 2px;
}
.sr-info { flex: 1; min-width: 0; }
.sr-title { font-size: 0.9rem; font-weight: 700; margin-bottom: 3px; color: var(--txt-primary); }
.sr-desc { font-size: 0.78rem; color: var(--txt-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── FOOTER ──────────────────────────────────────────────────── */
.search-box {
  max-width: 920px;
  max-height: min(78vh, 920px);
  background:
    linear-gradient(180deg, rgba(13,18,29,0.98), rgba(9,14,24,0.98));
  border-color: rgba(255,255,255,0.09);
}
.search-input-row {
  padding: 18px 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0));
}
.search-results-list {
  padding: var(--sp-4);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0));
}
.search-discovery,
.search-cluster {
  display: grid;
  gap: var(--sp-4);
}
.search-hero-panel,
.search-cluster,
.bookmark-shelf {
  position: relative;
  overflow: hidden;
  border-radius: 26px;
  border: 1px solid rgba(255,255,255,0.08);
  background:
    linear-gradient(180deg, rgba(18,24,36,0.98), rgba(10,14,22,0.98));
}
.search-hero-panel::before,
.search-cluster::before,
.bookmark-shelf::before,
.search-result-card::before,
.bookmark-card::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at top right, rgba(var(--card-accent-rgb, 52 211 153), 0.14), transparent 52%);
}
.search-hero-panel > *,
.search-cluster > *,
.bookmark-shelf > *,
.search-result-card > *,
.bookmark-card > * {
  position: relative;
  z-index: 1;
}
.search-hero-panel,
.search-cluster,
.bookmark-shelf {
  padding: clamp(18px, 2vw, 28px);
}
.search-hero-kicker,
.search-cluster-label,
.bookmark-shelf-kicker,
.bookmark-card-kicker,
.search-result-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.search-hero-kicker,
.bookmark-shelf-kicker { color: var(--accent); }
.search-hero-title,
.bookmark-shelf-title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2vw, 2rem);
  line-height: 1.1;
  margin: 0;
  color: var(--txt-primary);
}
.search-hero-desc,
.bookmark-shelf-desc,
.search-cluster-empty,
.search-result-desc,
.bookmark-card-desc,
.bookmark-card-cat {
  color: var(--txt-secondary);
  line-height: 1.65;
}
.search-cluster-head,
.bookmark-shelf-head,
.bookmark-card-top,
.search-result-top,
.search-result-meta,
.bookmark-card-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.bookmark-shelf-head {
  align-items: flex-end;
  flex-wrap: wrap;
}
.search-cluster-head {
  align-items: center;
  gap: 8px;
}
.search-cluster-count,
.bookmark-card-open,
.search-result-open {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.search-cluster-count {
  color: var(--txt-muted);
}
.bookmark-card-open,
.search-result-open {
  color: var(--lc, var(--accent));
}
.search-chip-row,
.bookmark-shelf-actions,
.bookmark-shelf-stats,
.bookmark-card-pills,
.search-result-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.search-history-chip,
.bookmark-action-btn,
.search-suggest-card,
.search-meta-pill,
.bookmark-stat,
.search-result-bookmark,
.bookmark-card-remove {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
}
.search-history-chip,
.bookmark-action-btn,
.search-suggest-card {
  appearance: none;
  color: var(--txt-primary);
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast), background var(--t-fast);
}
.search-history-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 0.84rem;
}
.search-history-chip:hover,
.bookmark-action-btn:hover,
.search-suggest-card:hover,
.search-result-card:hover,
.bookmark-card:hover {
  transform: translateY(-2px);
}
.search-history-chip:hover,
.bookmark-action-btn:hover,
.search-suggest-card:hover {
  border-color: rgba(79,255,176,0.32);
  background: rgba(79,255,176,0.08);
}
.search-history-chip-icon {
  color: var(--accent);
  font-size: 0.92rem;
}
.search-suggest-grid,
.search-result-grid,
.search-bookmark-grid,
.bookmark-grid {
  display: grid;
  gap: 12px;
}
.search-suggest-grid {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}
.search-result-grid,
.bookmark-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}
.search-bookmark-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.search-suggest-card {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border-radius: 18px;
  text-align: left;
}
.search-suggest-icon,
.search-result-icon,
.bookmark-card-icon {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(var(--card-accent-rgb, 52 211 153), 0.16);
  box-shadow: inset 0 0 0 1px rgba(var(--card-accent-rgb, 52 211 153), 0.14);
  color: var(--lc, var(--accent));
  font-family: var(--font-display);
  font-weight: 800;
}
.search-suggest-copy,
.search-result-copy,
.bookmark-card-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.search-suggest-title,
.search-result-title,
.bookmark-card-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--txt-primary);
  line-height: 1.35;
}
.search-suggest-meta {
  font-size: 0.76rem;
  color: var(--txt-muted);
}
.search-result-card,
.bookmark-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 214px;
  padding: 18px;
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,0.08);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)),
    linear-gradient(180deg, rgba(var(--card-accent-rgb, 52 211 153), 0.05), rgba(10,14,22,0.98));
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast), box-shadow var(--t-fast);
}
.search-result-card:hover,
.bookmark-card:hover {
  border-color: rgba(var(--card-accent-rgb, 52 211 153), 0.34);
  box-shadow: 0 16px 36px rgba(0,0,0,0.22);
}
.search-result-visual,
.bookmark-card-visual {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.search-result-bookmark,
.bookmark-card-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  color: var(--txt-muted);
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.search-result-bookmark:hover,
.search-result-bookmark.active {
  border-color: rgba(250,204,21,0.45);
  color: #facc15;
  background: rgba(250,204,21,0.12);
}
.bookmark-card-remove:hover {
  border-color: rgba(255,79,79,0.36);
  color: var(--danger);
  background: rgba(255,79,79,0.10);
}
.search-result-lang,
.bookmark-card-cat {
  font-size: 0.8rem;
}
.search-result-title,
.bookmark-card-title {
  margin: 0;
}
.search-result-desc,
.bookmark-card-desc {
  font-size: 0.84rem;
  min-height: 3.9em;
}
.search-result-meta,
.bookmark-card-meta {
  margin-top: auto;
  align-items: flex-end;
}
.search-meta-pill,
.bookmark-stat {
  padding: 8px 12px;
  border-radius: 999px;
}
.search-meta-pill {
  font-size: 0.76rem;
  color: var(--txt-secondary);
}
.bookmark-stat {
  min-width: 106px;
}
.bookmark-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.22rem;
  color: var(--txt-primary);
}
.bookmark-stat span {
  font-size: 0.76rem;
  color: var(--txt-muted);
}
.bookmark-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  font-weight: 700;
}
.bookmark-action-btn.secondary {
  background: transparent;
}
.bookmark-card.compact {
  min-height: 0;
  padding: 16px;
}
.bookmark-card.compact .bookmark-card-title,
.search-result-title {
  font-size: 0.96rem;
}
.search-cluster-empty {
  display: grid;
  gap: 12px;
}

#footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--sp-10) var(--sp-6);
  margin-top: var(--sp-16);
}
.footer-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--sp-10);
}
.footer-brand .footer-logo {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--txt-primary);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.footer-brand p {
  font-size: 0.82rem;
  color: var(--txt-muted);
  line-height: 1.65;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--txt-muted);
  margin-bottom: var(--sp-4);
}
.footer-col a {
  display: block;
  font-size: 0.84rem;
  color: var(--txt-secondary);
  margin-bottom: var(--sp-2);
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1440px;
  margin: var(--sp-8) auto 0;
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--txt-muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

/* ── ANIMATIONS ──────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}
.animate-up { animation: fadeUp 0.4s var(--ease) forwards; }
.animate-in { animation: fadeIn 0.3s var(--ease) forwards; }

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 1260px) {
  .nav-inner { gap: var(--sp-3); }
  .nav-links a {
    padding: 8px 10px;
    font-size: 0.78rem;
  }
  .nav-controls { gap: 6px; }
  .nav-search-btn span,
  .nav-search-btn kbd { display: none; }
  .nav-search-btn { padding: 8px; border-radius: 10px; }
  .lang-select { max-width: 108px; }
  .home-hero-shell {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
  }
  .home-track-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (max-width: 1100px) {
  .content-grid { grid-template-columns: 240px 1fr; }
}
@media (max-width: 900px) {
  .content-grid { grid-template-columns: 1fr; }
  .ai-content-grid,
  .vibe-content-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; max-height: 320px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  /* Show hamburger */
  .hamburger-btn { display: flex; }
  .nav-inner { gap: var(--sp-2); }
  .nav-divider { display: none; }
  .nav-logo { min-width: 0; gap: 8px; }
  .nav-logo .logo-mark { width: 24px; height: 24px; font-size: 0.68rem; }
  .nav-logo .logo-text { font-size: 0.84rem; }
  .nav-controls { gap: 6px; }
  .hamburger-btn,
  .theme-toggle,
  .nav-search-btn {
    min-width: 42px;
    min-height: 42px;
  }
  .hamburger-btn { padding: 10px; }
  .theme-toggle { padding: 8px; }

  /* Mobile menu overlay — improved design */
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--bg-base);
    z-index: 499;
    flex-direction: column;
    height: calc(100vh - 56px);
    height: calc(100dvh - 56px);
    padding: calc(var(--sp-4) + env(safe-area-inset-top)) var(--sp-5) calc(var(--sp-6) + env(safe-area-inset-bottom));
    gap: 2px;
    overflow-y: auto;
    animation: fadeIn 0.15s var(--ease);
    backdrop-filter: blur(24px);
  }
  .mobile-menu-open .nav-links {
    display: flex;
  }
  .nav-links li { list-style: none; }
  .nav-link-programming { display: list-item; }
  .nav-links a {
    padding: 14px var(--sp-4);
    font-size: 0.95rem;
    border-radius: var(--r-md);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--t-fast);
  }
  .nav-links a:last-child { border-bottom: none; }
  .nav-links a:hover,
  .nav-links a:active { background: var(--bg-raised); }
  .nav-links a.active {
    background: rgba(79,255,176,0.06);
    border-left: 3px solid var(--accent);
    padding-left: calc(var(--sp-4) - 3px);
  }
  .nav-links .nav-dot { width: 8px; height: 8px; }

  /* Compact search button on mobile */
  .nav-search-btn kbd { display: none; }
  .nav-search-btn span { display: none; }
  .nav-search-btn { padding: 8px; border-radius: 10px; }

  .home-track-panel { display: none; }
  .hero-langs-mobile { display: flex; }

  /* Responsive controls */
  .lang-select { font-size: 0.72rem; font-weight: 500; padding: 4px 24px 4px 8px; max-width: 106px; }

  /* Mobile sidebar — compact collapsible */
  .sidebar { max-height: 240px; border-radius: var(--r-md); }
  .sidebar-list { max-height: 140px; }
  .ai-sidebar,
  .vibe-sidebar { max-height: 300px; }
  .ai-sidebar .sidebar-list,
  .vibe-sidebar .sidebar-list { max-height: 200px; }
  .ai-list-summary { -webkit-line-clamp: 3; font-size: 0.78rem; }
  .vibe-list-summary { -webkit-line-clamp: 2; font-size: 0.78rem; }

  /* Filter chips — horizontal scroll */
  .filter-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    scroll-padding-inline: var(--sp-3);
    padding-bottom: var(--sp-2);
    gap: var(--sp-1);
  }
  .filter-bar::-webkit-scrollbar { display: none; }
  .filter-chip { white-space: nowrap; flex-shrink: 0; }

  /* Lang tab bar scroll */
  .lang-tabbar {
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    scroll-padding-inline: var(--sp-3);
    padding-right: var(--sp-3);
  }
  .lang-tabbar::-webkit-scrollbar { display: none; }
  .lang-tab { white-space: nowrap; flex-shrink: 0; }

  #diff-filter {
    flex-wrap: wrap;
    overflow: visible;
    margin-top: 0 !important;
    gap: var(--sp-2);
  }
  #diff-filter .filter-total {
    order: 99;
    width: 100%;
    margin-left: 0;
    padding-top: 2px;
    white-space: nowrap;
  }

  /* Code block — better mobile readability */
  .code-block pre {
    font-size: 0.78rem;
    padding: var(--sp-3);
    line-height: 1.6;
  }

  /* Detail panel — tighter on mobile */
  .detail-header { padding: var(--sp-4) var(--sp-5); }
  .detail-body { padding: var(--sp-4) var(--sp-5); }
  .detail-h2 { font-size: 1.25rem; }

  /* Search modal — near fullscreen on mobile */
  #search-modal { padding-top: 10px; padding: 10px; }
  .search-box {
    max-height: 90vh;
    border-radius: var(--r-lg);
    max-width: 100%;
  }
  .search-input-row { padding: 12px 14px; }
  .search-input-row input { font-size: 1rem; }
  .search-results-list { padding: var(--sp-3); }
  .search-hero-panel,
  .search-cluster,
  .bookmark-shelf {
    padding: var(--sp-5);
    border-radius: 22px;
  }
  .search-suggest-grid,
  .search-result-grid,
  .search-bookmark-grid,
  .bookmark-grid {
    grid-template-columns: 1fr;
  }
  .search-result-card,
  .bookmark-card {
    min-height: 0;
    padding: 16px;
    border-radius: 18px;
  }
  .bookmark-shelf-head,
  .search-result-meta,
  .bookmark-card-meta {
    flex-direction: column;
    align-items: flex-start;
  }
  .bookmark-shelf-actions {
    width: 100%;
  }
  .bookmark-action-btn {
    flex: 1 1 100%;
  }
  .search-history-chip {
    width: 100%;
    justify-content: flex-start;
  }

  /* Hero smaller on mobile */
  .hero { padding: var(--sp-10) var(--sp-4) var(--sp-8); }
  .hero-sub { font-size: 0.9rem; }
  .hero-stats { gap: var(--sp-5); }
  .hero-stat-num { font-size: 1.3rem; }
  .hero-langs { gap: var(--sp-1); }
  .hero-lang-pill { min-height: 38px; padding: 8px 12px; font-size: 0.74rem; }

  /* Item cards — full width with touch target */
  .item-card { padding: var(--sp-4); }
  .item-title { font-size: 0.88rem; }
  .item-desc { font-size: 0.8rem; }
  .item-card-head,
  .item-footer {
    gap: var(--sp-2);
  }
  .item-footer {
    flex-wrap: wrap;
    align-items: flex-start;
  }
  .item-arrow {
    width: 28px;
    height: 28px;
  }
  .programming-empty-state {
    padding: var(--sp-5);
    border-radius: 20px;
  }
  .programming-empty-visual {
    flex-direction: column;
    align-items: flex-start;
  }
  .programming-empty-icon {
    width: 50px;
    height: 50px;
    border-radius: 16px;
    font-size: 1.1rem;
  }
  .programming-empty-title {
    font-size: 1.2rem;
  }

  /* Card grid on mobile */
  .card { padding: var(--sp-4); }
  .card-title { font-size: 0.92rem; }
  .card-desc { font-size: 0.8rem; }
  .card-icon { font-size: 1.4rem; margin-bottom: var(--sp-2); }
  .beginner-grid.home-beginner-grid { grid-template-columns: 1fr; }
  .beginner-card { min-width: 0; }
  .home-beginner-grid .home-beginner-card {
    width: 100%;
    max-width: 100%;
  }

  .sidebar-item {
    padding: 10px 12px;
  }
  .ai-list-summary {
    -webkit-line-clamp: 2;
  }

  .detail-header { padding: var(--sp-4) var(--sp-5); }
  .detail-sub { font-size: 0.84rem; }
  .detail-body { padding: var(--sp-4) var(--sp-5); }
  .detail-section {
    padding: var(--sp-4);
    border-radius: 16px;
  }
  .detail-header-main {
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-3);
  }
  .detail-header-actions {
    width: 100%;
    margin-top: 0;
    flex-wrap: wrap;
  }
  .detail-header-actions .bookmark-btn,
  .detail-header-actions .share-btn {
    flex: 1 1 140px;
    justify-content: center;
  }
  .detail-panel.is-mobile-compact .detail-header {
    padding: var(--sp-4);
  }
  .detail-panel.is-mobile-compact .detail-body {
    gap: var(--sp-3);
    padding: var(--sp-4);
  }
  .detail-panel.is-mobile-compact .detail-section {
    padding: var(--sp-4);
  }
  .detail-panel.is-mobile-compact .detail-section-code,
  .detail-panel.is-mobile-compact .detail-section-related {
    padding: 0;
    border: none;
    background: transparent;
  }
  .detail-panel.is-mobile-compact .detail-section-code::before,
  .detail-panel.is-mobile-compact .detail-section-related::before {
    display: none;
  }
  .detail-accordion-summary {
    min-height: 46px;
    padding: 12px 14px;
  }
  .detail-accordion-body {
    padding: 0 14px 14px;
  }
  .detail-accordion-label {
    font-size: 0.7rem;
  }
  .detail-accordion-hint {
    min-width: 30px;
    height: 30px;
  }
  .vibe-spotlight {
    padding: var(--sp-5);
  }
  .vibe-spotlight-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .vibe-spotlight-title {
    font-size: 1.18rem;
  }
  .vibe-spotlight-desc {
    font-size: 0.9rem;
    line-height: 1.72;
  }
  .vibe-spotlight-notes {
    grid-template-columns: 1fr;
    gap: var(--sp-2);
    margin-top: var(--sp-4);
  }
  .vibe-note-card {
    padding: 12px 14px;
    border-radius: 16px;
  }
  .vibe-detail-summary-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-2);
  }
  .vibe-card {
    min-height: 0;
    padding: var(--sp-4);
  }
  .vibe-card-desc {
    -webkit-line-clamp: 2;
  }
  .related-btn {
    min-width: 100%;
  }

  .compare-grid { grid-template-columns: 1fr; }
  .compare-filter-label {
    width: 100%;
    margin-right: 0;
    margin-bottom: 6px;
  }
  .compare-card-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .prompt-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-3);
  }

  /* Beginner cards — stronger scan pattern on small screens */
  .beginner-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-3);
  }
  .beginner-card {
    padding: var(--sp-4);
    border-radius: 20px;
  }
  .beginner-card:hover { transform: translateY(-3px); }
  .beginner-visual {
    min-height: 0;
    padding: var(--sp-4);
    border-radius: 18px;
  }
  .beginner-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    font-size: 1.45rem;
  }
  .beginner-token-row { max-width: none; }
  .beginner-token {
    min-width: 34px;
    padding: 6px 8px;
    font-size: 0.68rem;
  }
  .beginner-flow { gap: 8px; }
  .beginner-node {
    padding: 10px 12px;
    font-size: 0.92rem;
  }
  .beginner-equals {
    width: 32px;
    height: 32px;
    font-size: 0.82rem;
  }
  .beginner-summary { font-size: 0.9rem; }
  .beginner-example {
    padding: 12px 14px;
    gap: var(--sp-2);
  }
  .beginner-example-text,
  .beginner-support { font-size: 0.82rem; }

  /* Prompt blocks on mobile */
  .prompt-body { font-size: 0.75rem; padding: var(--sp-3); }

  /* Toast position — above bottom nav */
  .toast-container { bottom: 70px; right: 12px; left: 12px; }
  .toast { max-width: 100%; font-size: 0.78rem; }

  /* Back to top — smaller on mobile */
  .back-to-top { width: 36px; height: 36px; bottom: 20px; right: 16px; font-size: 0.9rem; }

  /* Footer compact */
  .footer-bottom { flex-direction: column; gap: var(--sp-2); text-align: center; }

  /* Progress bar tighter */
  .progress-bar-wrap { padding: var(--sp-3) var(--sp-4); }

  .lang-tab,
  .filter-chip,
  .pager-btn,
  .bookmark-btn,
  .share-btn {
    min-height: 38px;
  }
  .lang-tab {
    padding-top: 12px;
    padding-bottom: 12px;
  }
  .filter-chip,
  .pager-btn,
  .bookmark-btn,
  .share-btn {
    padding-top: 8px;
    padding-bottom: 8px;
  }
}

@media (max-width: 480px) {
  #nav { padding: 0 8px; }
  .nav-inner {
    gap: 4px;
    position: relative;
  }
  .nav-logo { gap: 6px; }
  .nav-logo .logo-mark {
    width: 24px;
    height: 24px;
    font-size: 0.68rem;
  }
  .nav-logo .logo-text {
    display: none;
    font-size: 0.72rem;
  }
  .nav-controls {
    gap: 4px;
    margin-left: auto;
    min-width: 84px;
    padding-right: 84px;
  }
  .lang-select {
    display: none;
  }
  .hamburger-btn,
  .theme-toggle,
  .nav-search-btn {
    min-width: 38px;
    min-height: 38px;
  }
  .theme-toggle,
  .nav-search-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
  }
  .theme-toggle { right: 42px; }
  .nav-search-btn { right: 0; }
}

@media (max-width: 640px) {
  .hero-h1 { letter-spacing: -2px; font-size: clamp(2rem, 10vw, 3.5rem); }
  .footer-inner { grid-template-columns: 1fr; gap: var(--sp-6); }
  .section { padding: var(--sp-6) var(--sp-3); }
  .card-grid { grid-template-columns: 1fr; }
  .item-grid { grid-template-columns: 1fr; }
  .section-head { gap: var(--sp-2); }
  .section-title { font-size: 1.1rem; }

  /* Compare grid single column */
  .compare-table td { font-size: 0.78rem; padding: 8px 10px; }
  .compare-card-tip { padding: var(--sp-3) var(--sp-4); }
}

@media (max-width: 380px) {
  /* Extra small phones */
  .hero-h1 { font-size: 1.8rem; letter-spacing: -1px; }
  .hero-eyebrow { font-size: 0.65rem; }
  .nav-inner { gap: 6px; }
  .nav-logo .logo-text { font-size: 0.78rem; }
  .lang-select { display: none; }
  .card-grid { gap: var(--sp-2); }
  .item-grid { gap: var(--sp-2); }
  .beginner-token {
    min-width: 32px;
    padding: 5px 8px;
  }
  .beginner-flow { gap: 6px; }
  .beginner-node { width: 100%; justify-content: center; }
  .beginner-equals { margin-left: auto; margin-right: auto; }
}

/* ── BEGINNER SECTION ────────────────────────────────────────── */
.beginner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--sp-5);
}
.beginner-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(17,24,39,0.96) 0%, rgba(8,14,28,0.98) 100%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 24px;
  padding: var(--sp-5);
  box-shadow: 0 18px 48px rgba(0,0,0,0.26);
  transition: transform var(--t-med) var(--ease),
              border-color var(--t-med) var(--ease),
              box-shadow var(--t-med) var(--ease);
}
.beginner-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgb(var(--tone-rgb, 52 211 153) / 0.9), transparent);
  opacity: 0.8;
}
.beginner-card::after {
  content: '';
  position: absolute;
  top: -84px;
  right: -68px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(var(--tone-rgb, 52 211 153) / 0.18) 0%, transparent 68%);
  pointer-events: none;
}
.beginner-card:hover {
  transform: translateY(-6px);
  border-color: rgb(var(--tone-rgb, 52 211 153) / 0.28);
  box-shadow: 0 24px 54px rgba(0,0,0,0.34);
}
.beginner-card-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}
.beginner-visual {
  position: relative;
  overflow: hidden;
  min-height: 172px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-5);
  border-radius: 20px;
  border: 1px solid rgb(var(--tone-rgb, 52 211 153) / 0.18);
  background: linear-gradient(180deg, rgb(var(--tone-rgb, 52 211 153) / 0.12), rgba(255,255,255,0.02));
}
.beginner-visual::after {
  content: '';
  position: absolute;
  right: -40px;
  bottom: -56px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(var(--tone-rgb, 52 211 153) / 0.16) 0%, transparent 70%);
  pointer-events: none;
}
.beginner-visual-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-3);
}
.beginner-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  font-size: 1.7rem;
  background: rgb(var(--tone-rgb, 52 211 153) / 0.18);
  box-shadow: inset 0 0 0 1px rgb(var(--tone-rgb, 52 211 153) / 0.18);
  backdrop-filter: blur(10px);
}
.beginner-token-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--sp-2);
  max-width: 65%;
}
.beginner-token {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgb(var(--tone-rgb, 52 211 153) / 0.16);
  background: rgba(7,11,20,0.42);
  color: rgb(var(--tone-rgb, 52 211 153) / 0.95);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1;
  backdrop-filter: blur(8px);
}
.beginner-flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.beginner-node {
  display: inline-flex;
  align-items: center;
  padding: 12px 16px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(7,11,20,0.6);
  color: var(--txt-primary);
  font-size: clamp(0.95rem, 2vw, 1.12rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}
.beginner-node-metaphor {
  color: rgb(var(--tone-rgb, 52 211 153) / 0.98);
  border-color: rgb(var(--tone-rgb, 52 211 153) / 0.22);
  background: rgb(var(--tone-rgb, 52 211 153) / 0.12);
}
.beginner-equals {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgb(var(--tone-rgb, 52 211 153) / 0.18);
  background: rgb(var(--tone-rgb, 52 211 153) / 0.18);
  color: rgb(var(--tone-rgb, 52 211 153) / 0.96);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1;
}
.beginner-copy {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.beginner-summary {
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--txt-primary);
}
.beginner-example {
  display: grid;
  grid-template-columns: 3px 1fr;
  gap: var(--sp-3);
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgb(var(--tone-rgb, 52 211 153) / 0.16);
  background: linear-gradient(180deg, rgba(7,11,20,0.36), rgba(7,11,20,0.72));
}
.beginner-example-mark {
  border-radius: 999px;
  background: linear-gradient(180deg, rgb(var(--tone-rgb, 52 211 153)), rgba(255,255,255,0.2));
}
.beginner-example-text,
.beginner-support {
  font-size: 0.86rem;
  color: var(--txt-secondary);
  line-height: 1.75;
  word-break: keep-all;
}
.beginner-example-text code,
.beginner-support code {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  margin: 0 2px;
  border-radius: 999px;
  border: 1px solid rgb(var(--tone-rgb, 52 211 153) / 0.18);
  background: rgba(7,11,20,0.72);
  color: rgb(var(--tone-rgb, 52 211 153) / 0.96);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.4;
}

/* ── ROADMAP SECTION ─────────────────────────────────────────── */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-4);
}
.roadmap-card {
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: var(--sp-5) var(--sp-6);
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.roadmap-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--border-subtle);
}
.roadmap-icon { font-size: 1.6rem; }
.roadmap-goal {
  font-size: 1rem;
  font-weight: 700;
  color: var(--txt-primary);
}
.roadmap-lang {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
}
.roadmap-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.roadmap-steps li {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: 0.86rem;
  color: var(--txt-secondary);
  padding: var(--sp-2) 0;
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.5;
}
.roadmap-steps li:last-child { border-bottom: none; }
.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(79,255,176,0.1);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  flex-shrink: 0;
  border: 1px solid rgba(79,255,176,0.2);
}

/* ── LOADING SKELETON ────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--bg-overlay) 25%, var(--border-subtle) 50%, var(--bg-overlay) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--r-sm);
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── PROMPT PAGE ─────────────────────────────────────────────── */
.prompt-block {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(17,24,39,0.98), rgba(8,14,28,0.98));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: var(--sp-8);
  box-shadow: 0 18px 42px rgba(0,0,0,0.2);
}
.prompt-block::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(251,191,36,0.9), transparent);
}
.prompt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  background: linear-gradient(180deg, rgba(251,191,36,0.10), rgba(255,255,255,0.02));
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.prompt-title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #ffd166;
}
.prompt-body {
  padding: var(--sp-5);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.82;
  color: var(--txt-secondary);
  white-space: pre-wrap;
  background: linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0));
}
.prompt-body .ph-var { color: #ffcc4f; }  /* {{variable}} */
.prompt-body .ph-cmd { color: #82aaff; }  /* commands */
.prompt-body .ph-str { color: #c3e88d; }  /* strings */

/* ── BADGE INLINE ────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  color: var(--txt-muted);
}
.badge.kotlin { color: var(--kotlin); border-color: rgba(176,100,255,0.25); background: rgba(176,100,255,0.07); }
.badge.python { color: var(--python); border-color: rgba(77,166,217,0.25); background: rgba(77,166,217,0.07); }
.badge.go     { color: var(--go);     border-color: rgba(0,173,216,0.25); background: rgba(0,173,216,0.07); }
.badge.php    { color: var(--php);    border-color: rgba(96,125,255,0.25); background: rgba(96,125,255,0.07); }
.badge.javascript { color: var(--javascript); border-color: rgba(250,204,21,0.28); background: rgba(250,204,21,0.10); }
.badge.typescript { color: var(--typescript); border-color: rgba(59,130,246,0.25); background: rgba(59,130,246,0.08); }
.badge.csharp     { color: var(--csharp); border-color: rgba(168,85,247,0.25); background: rgba(168,85,247,0.08); }
.badge.cpp        { color: var(--cpp); border-color: rgba(96,165,250,0.25); background: rgba(96,165,250,0.08); }
.badge.rust       { color: var(--rust); border-color: rgba(234,88,12,0.25); background: rgba(234,88,12,0.08); }
.badge.java   { color: var(--java);   border-color: rgba(248,152,32,0.25); background: rgba(248,152,32,0.07); }

/* ── 즐겨찾기 & 진행도 ─────────────────────────────────── */
.bookmark-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--txt-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.bookmark-btn:hover { border-color: var(--warn); color: var(--warn); }
.bookmark-btn.active { border-color: var(--warn); color: var(--warn); background: rgba(255,214,10,0.06); }

.share-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--txt-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
}
.share-btn:hover { border-color: var(--accent); color: var(--accent); }

.viewed-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 7px;
  border-radius: 100px;
  background: rgba(79,255,176,0.07);
  color: var(--accent);
  border: 1px solid rgba(79,255,176,0.2);
}

.progress-bar-wrap {
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  padding: var(--sp-4) var(--sp-5);
  margin-bottom: var(--sp-4);
}
.progress-bar-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--txt-muted);
  margin-bottom: var(--sp-2);
}
.progress-bar-track {
  height: 4px;
  background: var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width 0.5s var(--ease);
}

/* ── 북마크 패널 ─────────────────────────────────────── */
.bookmark-panel {
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  margin-bottom: var(--sp-6);
}
.bookmark-panel-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--warn);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.bookmark-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.83rem;
  color: var(--txt-secondary);
  cursor: pointer;
  transition: color var(--t-fast);
}
.bookmark-item:last-child { border-bottom: none; }
.bookmark-item:hover { color: var(--txt-primary); }
.bookmark-remove {
  font-size: 0.7rem;
  color: var(--txt-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all var(--t-fast);
}
.bookmark-remove:hover { color: var(--danger); background: rgba(255,79,79,0.08); }

/* ── GA / AdSense 슬롯 ─────────────────────────────────── */
.ad-slot {
  min-height: 90px;
  background: var(--bg-overlay);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--txt-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin: var(--sp-6) 0;
}

/* ── 라이트 테마 ──────────────────────────────────────── */
[data-theme="light"] {
  --bg-base:    #f4f7fb;
  --bg-raised:  #ffffff;
  --bg-overlay: #eef3f9;
  --bg-glass:   rgba(248,250,252,0.94);
  --border-subtle: rgba(15,23,42,0.10);
  --border-muted:  rgba(15,23,42,0.16);
  --border-strong: rgba(15,23,42,0.24);
  --txt-primary:   #0f172a;
  --txt-secondary: #334155;
  --txt-muted:     #667085;
  --txt-code:      #1f2937;
  --accent:   #059669;
  --accent2:  #2563eb;

  --kotlin: hsl(270,65%,48%);
  --python: hsl(210,60%,42%);
  --go:     hsl(194,75%,35%);
  --php:    hsl(225,64%,46%);
  --javascript: hsl(49,88%,44%);
  --typescript: hsl(211,70%,46%);
  --csharp: hsl(274,58%,48%);
  --cpp: hsl(215,62%,48%);
  --rust: hsl(18,76%,44%);
  --java:   hsl(35,80%,40%);
}
[data-theme="light"] body {
  background:
    radial-gradient(circle at top left, rgba(37,99,235,0.05), transparent 32%),
    linear-gradient(180deg, #f8fbff 0%, #f4f7fb 100%);
  color: var(--txt-primary);
}
[data-theme="light"] .code-block,
[data-theme="light"] .code-block pre { background: #f8f9fa; }
[data-theme="light"] .card { background: #fff; border-color: #e5e7eb; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
[data-theme="light"] .card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.12); border-color: var(--accent); }
[data-theme="light"] .card-title { color: #111; }
[data-theme="light"] .card-desc { color: #444; }
[data-theme="light"] .info-box.tip { background: rgba(5,150,105,0.06); border-color: rgba(5,150,105,0.2); color: #065f46; }
[data-theme="light"] .info-box.warn { background: rgba(180,120,0,0.06); border-color: rgba(180,120,0,0.2); color: #78350f; }
[data-theme="light"] .hero-h1 { color: #111; }
[data-theme="light"] .hero-h1 .accent-text { background: linear-gradient(135deg, #059669, #0891b2); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
[data-theme="light"] .hero-sub { color: #444; }
[data-theme="light"] .hero-stat-num { color: #111; }
[data-theme="light"] .hero-stat-label { color: #526075; }
[data-theme="light"] .home-hero::before {
  background-image:
    linear-gradient(rgba(15,23,42,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,23,42,0.05) 1px, transparent 1px);
  opacity: 0.55;
}
[data-theme="light"] .home-hero::after {
  background:
    radial-gradient(ellipse at center, rgba(37,99,235,0.10) 0%, rgba(5,150,105,0.07) 35%, transparent 68%);
}
[data-theme="light"] .home-hero-inner {
  position: relative;
}
[data-theme="light"] .home-hero-inner::before {
  content: '';
  position: absolute;
  inset: -28px -20px -36px;
  z-index: -1;
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.85), rgba(255,255,255,0.60)),
    radial-gradient(circle at top right, rgba(37,99,235,0.10), transparent 42%);
  border: 1px solid rgba(15,23,42,0.06);
  box-shadow: 0 24px 60px rgba(15,23,42,0.06);
}
[data-theme="light"] .hero-eyebrow { border-color: rgba(5,150,105,0.25); background: rgba(5,150,105,0.06); color: #059669; }
[data-theme="light"] .hero-stats {
  gap: var(--sp-4);
}
[data-theme="light"] .hero-stat {
  min-width: 140px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.78);
  border: 1px solid rgba(15,23,42,0.08);
  box-shadow: 0 8px 20px rgba(15,23,42,0.05);
  backdrop-filter: blur(8px);
}
[data-theme="light"] .hero-lang-pill {
  background: #fff;
  border-color: rgba(15,23,42,0.12);
  color: #334155;
  box-shadow: 0 1px 2px rgba(15,23,42,0.04);
}
[data-theme="light"] .hero-lang-pill:hover { background: rgba(5,150,105,0.08); border-color: #059669; }
[data-theme="light"] .home-track-panel {
  border-color: rgba(15,23,42,0.10);
  background:
    radial-gradient(circle at top right, rgba(37,99,235,0.10), transparent 32%),
    linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,251,255,0.96));
  box-shadow: 0 18px 40px rgba(15,23,42,0.08);
}
[data-theme="light"] .home-track-panel-stat {
  border-color: rgba(15,23,42,0.08);
  background: rgba(15,23,42,0.04);
}
[data-theme="light"] .home-track-panel-desc,
[data-theme="light"] .hero-track-card-desc {
  color: #475569;
}
[data-theme="light"] .home-track-panel-title,
[data-theme="light"] .hero-track-card-pill {
  color: #0f172a;
}
[data-theme="light"] .hero-track-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,251,255,0.96));
  border-color: rgb(var(--card-accent-rgb, 5 150 105) / 0.16);
  box-shadow: 0 12px 24px rgba(15,23,42,0.05);
}
[data-theme="light"] .hero-track-card:hover {
  border-color: rgb(var(--card-accent-rgb, 5 150 105) / 0.24);
  box-shadow: 0 18px 34px rgba(15,23,42,0.08);
}
[data-theme="light"] .hero-track-card-icon {
  background: rgb(var(--card-accent-rgb, 5 150 105) / 0.12);
  box-shadow: inset 0 0 0 1px rgb(var(--card-accent-rgb, 5 150 105) / 0.16);
}
[data-theme="light"] #nav {
  background: rgba(248,250,252,0.94);
  border-bottom-color: rgba(15,23,42,0.08);
  box-shadow: 0 10px 28px rgba(15,23,42,0.05);
}
[data-theme="light"] .nav-divider { background: rgba(15,23,42,0.10); }
[data-theme="light"] .nav-links a { color: #475569; }
[data-theme="light"] .nav-links a:hover {
  color: #0f172a;
  background: #edf3fa;
}
[data-theme="light"] .nav-links a.active {
  color: #047857;
  border-bottom-color: #059669;
  background: rgba(5,150,105,0.06);
}
[data-theme="light"] .lang-select,
[data-theme="light"] .theme-toggle,
[data-theme="light"] .nav-search-btn,
[data-theme="light"] .bookmark-btn,
[data-theme="light"] .share-btn,
[data-theme="light"] .code-copy-btn,
[data-theme="light"] .pager-btn,
[data-theme="light"] .filter-chip,
[data-theme="light"] .cat-chip {
  background: #fff;
  border-color: rgba(15,23,42,0.12);
  color: #475569;
  box-shadow: 0 1px 2px rgba(15,23,42,0.04);
}
[data-theme="light"] .lang-select:hover,
[data-theme="light"] .theme-toggle:hover,
[data-theme="light"] .nav-search-btn:hover,
[data-theme="light"] .bookmark-btn:hover,
[data-theme="light"] .share-btn:hover,
[data-theme="light"] .code-copy-btn:hover,
[data-theme="light"] .pager-btn:hover,
[data-theme="light"] .filter-chip:hover,
[data-theme="light"] .cat-chip:hover {
  color: #0f172a;
  border-color: rgba(15,23,42,0.18);
  background: #f8fbff;
}
[data-theme="light"] .nav-search-btn kbd {
  background: #eef3f9;
  border-color: rgba(15,23,42,0.12);
  color: #64748b;
}
[data-theme="light"] .lang-select {
  color: #334155;
  font-weight: 600;
  letter-spacing: 0.02em;
  background:
    #ffffff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6' fill='%23475569'/%3E%3C/svg%3E")
    no-repeat right 10px center;
}
[data-theme="light"] .section-count,
[data-theme="light"] .filter-total,
[data-theme="light"] .progress-bar-label,
[data-theme="light"] .detail-breadcrumb,
[data-theme="light"] .bookmark-remove,
[data-theme="light"] .search-input-row kbd,
[data-theme="light"] .search-empty,
[data-theme="light"] .item-num,
[data-theme="light"] .hero-lang-pill .pill-count {
  color: #526075;
}
[data-theme="light"] .section-rule,
[data-theme="light"] .detail-section-title::after {
  background: rgba(15,23,42,0.10);
}
[data-theme="light"] .home-section .section-head {
  margin-bottom: var(--sp-6);
}
[data-theme="light"] .home-section .section-title {
  color: #0f172a;
}
[data-theme="light"] .home-quickstart .section-title,
[data-theme="light"] .home-popular .section-title,
[data-theme="light"] .home-beginner .section-title,
[data-theme="light"] .home-roadmap .section-title {
  position: relative;
  padding-left: 14px;
}
[data-theme="light"] .home-quickstart .section-title::before,
[data-theme="light"] .home-popular .section-title::before,
[data-theme="light"] .home-beginner .section-title::before,
[data-theme="light"] .home-roadmap .section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.2em;
  bottom: 0.18em;
  width: 4px;
  border-radius: 999px;
}
[data-theme="light"] .home-quickstart .section-title::before { background: linear-gradient(180deg, #34d399, #0ea5e9); }
[data-theme="light"] .home-popular .section-title::before { background: linear-gradient(180deg, #3b82f6, #14b8a6); }
[data-theme="light"] .home-beginner .section-title::before { background: linear-gradient(180deg, #22c55e, #84cc16); }
[data-theme="light"] .home-roadmap .section-title::before { background: linear-gradient(180deg, #f59e0b, #ef4444); }
[data-theme="light"] .lang-tabbar { border-bottom-color: rgba(15,23,42,0.10); }
[data-theme="light"] .lang-tab {
  color: #475569;
}
[data-theme="light"] .lang-tab:hover {
  color: #0f172a;
  background: #edf3fa;
}
[data-theme="light"] .lang-tab[data-active] {
  color: #0f172a;
  background: #fff;
  border-color: rgba(15,23,42,0.12);
  box-shadow: 0 8px 18px rgba(15,23,42,0.05);
}
[data-theme="light"] .lang-tab .tab-count {
  background: #e9eff7;
  color: #64748b;
}
[data-theme="light"] .lang-tab[data-active] .tab-count {
  background: #dce8f6;
  color: #475569;
  font-weight: 700;
}
[data-theme="light"] .filter-chip.active,
[data-theme="light"] .cat-chip.active {
  color: #047857;
  background: rgba(5,150,105,0.10);
  border-color: rgba(5,150,105,0.32);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(5,150,105,0.08);
}
[data-theme="light"] .pager-btn.active {
  color: #ffffff;
  background: #059669;
  border-color: #059669;
  box-shadow: 0 10px 20px rgba(5,150,105,0.20);
}
[data-theme="light"] .bookmark-btn:hover,
[data-theme="light"] .share-btn:hover,
[data-theme="light"] .code-copy-btn:hover {
  color: #047857;
  border-color: rgba(5,150,105,0.28);
  background: rgba(5,150,105,0.08);
}
[data-theme="light"] .bookmark-btn.active {
  color: #9a6700;
  background: rgba(251,191,36,0.12);
  border-color: rgba(251,191,36,0.35);
}
[data-theme="light"] .filter-chip.diff-i.active {
  color: #9a6700;
  border-color: rgba(180,120,0,0.28);
  background: rgba(180,120,0,0.08);
}
[data-theme="light"] .filter-chip.diff-a.active {
  color: #b42318;
  border-color: rgba(180,35,24,0.24);
  background: rgba(180,35,24,0.07);
}
[data-theme="light"] .sidebar,
[data-theme="light"] .detail-panel,
[data-theme="light"] .item-card,
[data-theme="light"] .beginner-card,
[data-theme="light"] .roadmap-card,
[data-theme="light"] .progress-bar-wrap,
[data-theme="light"] .bookmark-panel,
[data-theme="light"] .search-box,
[data-theme="light"] .compare-table-wrap {
  background: #fff;
  border-color: #dbe3ed;
  box-shadow: 0 10px 28px rgba(15,23,42,0.05);
}
[data-theme="light"] .sidebar-search,
[data-theme="light"] .sidebar-footer,
[data-theme="light"] .detail-header,
[data-theme="light"] .compare-table th,
[data-theme="light"] .search-input-row {
  border-color: rgba(15,23,42,0.08);
}
[data-theme="light"] .sidebar-search {
  background: #fbfdff;
}
[data-theme="light"] .sidebar-search input::placeholder,
[data-theme="light"] .search-input-row input::placeholder {
  color: #64748b;
}
[data-theme="light"] .sidebar-item:hover {
  background: #f6f9fd;
  border-color: rgba(15,23,42,0.08);
}
[data-theme="light"] .sidebar-item.active {
  background: #eef5fb;
  border-color: rgba(5,150,105,0.16);
  box-shadow: inset 0 0 0 1px rgba(5,150,105,0.14);
}
[data-theme="light"] .si-title { color: #475569; }
[data-theme="light"] .sidebar-item.active .si-title { color: #0f172a; }
[data-theme="light"] .ai-list-summary { color: #64748b; }
[data-theme="light"] .ai-list-item.active .ai-list-summary { color: #526075; }
[data-theme="light"] .vibe-list-summary { color: #64748b; }
[data-theme="light"] .vibe-list-item.active {
  background: rgb(var(--vibe-rgb, 244 114 182) / 0.10);
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.18);
  box-shadow: inset 0 0 0 1px rgb(var(--vibe-rgb, 244 114 182) / 0.10);
}
[data-theme="light"] .vibe-list-item.active .vibe-list-summary { color: #526075; }
[data-theme="light"] .ai-num {
  border-color: rgba(5,150,105,0.16);
  background: rgba(5,150,105,0.10);
  color: #047857;
}
[data-theme="light"] .vibe-num {
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.16);
  background: rgb(var(--vibe-rgb, 244 114 182) / 0.10);
  color: rgb(var(--vibe-rgb, 244 114 182) / 0.92);
}
[data-theme="light"] .si-badge {
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid rgba(15,23,42,0.08);
}
[data-theme="light"] .si-badge.b { background: rgba(5,150,105,0.12); color: #065f46; border-color: rgba(5,150,105,0.18); }
[data-theme="light"] .si-badge.i { background: rgba(180,120,0,0.10); color: #9a6700; border-color: rgba(180,120,0,0.18); }
[data-theme="light"] .si-badge.a { background: rgba(180,35,24,0.10); color: #b42318; border-color: rgba(180,35,24,0.16); }
[data-theme="light"] .detail-header {
  background: linear-gradient(180deg, #f3f7fd 0%, #ffffff 100%);
}
[data-theme="light"] .detail-header::after {
  background: radial-gradient(circle, color-mix(in srgb, var(--lc, #059669) 12%, transparent), transparent 72%);
}
[data-theme="light"] .detail-h2 {
  color: #0f172a;
}
[data-theme="light"] .detail-sub {
  color: #526075;
}
[data-theme="light"] .dtag {
  color: #526075;
  border-color: #d8e3ef;
  background: #f8fbff;
  font-weight: 600;
}
[data-theme="light"] .detail-desc code {
  background: #eef3f8;
  border-color: #d8e0ea;
  color: #0369a1;
}
[data-theme="light"] .detail-section-title {
  color: #334155;
  font-weight: 600;
  letter-spacing: 0.06em;
}
[data-theme="light"] .detail-desc {
  color: #334155;
}
[data-theme="light"] .detail-section {
  border-color: color-mix(in srgb, var(--lc, #059669) 14%, rgba(15,23,42,0.08));
  background: linear-gradient(180deg, color-mix(in srgb, var(--lc, #059669) 8%, #ffffff), #fbfdff);
}
[data-theme="light"] .vibe-spotlight {
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.16);
  background:
    radial-gradient(circle at top right, rgb(var(--vibe-rgb, 244 114 182) / 0.12), transparent 38%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: 0 18px 40px rgba(15,23,42,0.08);
}
[data-theme="light"] .vibe-spotlight-serial,
[data-theme="light"] .vibe-spotlight-chip {
  color: #526075;
  border-color: rgba(15,23,42,0.08);
  background: rgba(255,255,255,0.74);
}
[data-theme="light"] .vibe-note-card {
  background: rgba(255,255,255,0.76);
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.14);
}
[data-theme="light"] .vibe-note-label {
  color: #64748b;
}
[data-theme="light"] .vibe-card.active {
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.2);
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: 0 18px 34px rgba(15,23,42,0.08);
}
[data-theme="light"] .vibe-card-emphasis {
  background: rgba(248,250,252,0.9);
  border-color: rgb(var(--vibe-rgb, 244 114 182) / 0.12);
}
[data-theme="light"] .vibe-card-focus {
  color: #526075;
}
[data-theme="light"] .vibe-filter-chip-count {
  background: rgba(15,23,42,0.06);
  color: #64748b;
}
[data-theme="light"] .vibe-card-num {
  color: #64748b;
  border-color: rgba(15,23,42,0.08);
  background: #eef3f8;
}
[data-theme="light"] .detail-accordion {
  background: #fbfdff;
  border-color: #dbe3ed;
}
[data-theme="light"] .detail-accordion-summary {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}
[data-theme="light"] .detail-accordion-label {
  color: #334155;
}
[data-theme="light"] .detail-accordion-hint {
  color: #526075;
  border-color: #d8e0ea;
  background: #eef3f8;
}
[data-theme="light"] .detail-accordion[open] .detail-accordion-hint {
  color: #047857;
  border-color: rgba(5,150,105,0.24);
  background: rgba(5,150,105,0.08);
}
[data-theme="light"] .progress-bar-track {
  background: #dbe4ef;
}
[data-theme="light"] #search-modal {
  background: rgba(241,245,249,0.86);
  backdrop-filter: blur(14px);
}
[data-theme="light"] .search-box {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border-color: rgba(15,23,42,0.10);
  box-shadow: 0 28px 70px rgba(15,23,42,0.16);
}
[data-theme="light"] .search-input-row svg {
  opacity: 0.72;
  color: #526075;
}
[data-theme="light"] .search-input-row input {
  color: #0f172a;
  font-weight: 600;
}
[data-theme="light"] .search-results-list {
  background: linear-gradient(180deg, rgba(248,250,252,0.92), rgba(241,245,249,0.72));
}
[data-theme="light"] .search-hero-panel,
[data-theme="light"] .search-cluster,
[data-theme="light"] .bookmark-shelf,
[data-theme="light"] .search-result-card,
[data-theme="light"] .bookmark-card,
[data-theme="light"] .search-suggest-card,
[data-theme="light"] .search-history-chip {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,251,255,0.96));
  border-color: rgba(15,23,42,0.10);
  box-shadow: 0 14px 36px rgba(15,23,42,0.06);
}
[data-theme="light"] .search-hero-desc,
[data-theme="light"] .bookmark-shelf-desc,
[data-theme="light"] .search-cluster-empty,
[data-theme="light"] .search-result-desc,
[data-theme="light"] .bookmark-card-desc,
[data-theme="light"] .bookmark-card-cat,
[data-theme="light"] .search-suggest-meta,
[data-theme="light"] .search-meta-pill,
[data-theme="light"] .bookmark-stat span {
  color: #526075;
}
[data-theme="light"] .search-result-bookmark,
[data-theme="light"] .bookmark-card-remove,
[data-theme="light"] .bookmark-stat,
[data-theme="light"] .bookmark-action-btn.secondary {
  background: #ffffff;
  border-color: rgba(15,23,42,0.10);
}
[data-theme="light"] .search-result-bookmark.active {
  background: rgba(250,204,21,0.16);
}
[data-theme="light"] .search-cluster-count {
  color: #64748b;
}
[data-theme="light"] .search-result {
  border: 1px solid transparent;
}
[data-theme="light"] .search-result:hover {
  background: #eef4fa;
  border-color: rgba(15,23,42,0.08);
}
[data-theme="light"] .sr-title {
  color: #0f172a;
}
[data-theme="light"] .sr-desc {
  color: #526075;
}
[data-theme="light"] .sr-badge {
  box-shadow: inset 0 0 0 1px rgba(15,23,42,0.08);
}
[data-theme="light"] .home-card-grid .home-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,251,255,0.96));
  border-color: rgba(15,23,42,0.10);
  box-shadow: 0 14px 36px rgba(15,23,42,0.06);
}
[data-theme="light"] .home-card-grid .home-card::after {
  content: '';
  position: absolute;
  inset: auto -10% -50% auto;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--lc) 14%, transparent), transparent 68%);
  pointer-events: none;
}
[data-theme="light"] .home-card-grid .home-card:hover {
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--lc) 28%, rgba(15,23,42,0.10));
  box-shadow: 0 22px 46px rgba(15,23,42,0.10);
}
[data-theme="light"] .home-card-grid .home-card .card-icon {
  width: 54px;
  height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  margin-bottom: var(--sp-4);
  background: color-mix(in srgb, var(--lc) 12%, white);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--lc) 16%, transparent);
}
[data-theme="light"] .home-card-grid .home-card .card-title {
  color: #0f172a;
}
[data-theme="light"] .home-card-grid .home-card .card-desc {
  color: #475569;
}
[data-theme="light"] .home-card-grid .home-card .card-count {
  background: color-mix(in srgb, var(--lc) 10%, white) !important;
  border-color: color-mix(in srgb, var(--lc) 26%, rgba(15,23,42,0.10)) !important;
}
[data-theme="light"] .home-popular-grid .home-featured-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #ffffff, #f8fbff);
  border-color: rgba(15,23,42,0.10);
}
[data-theme="light"] .home-popular-grid .home-featured-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--python), var(--go));
  opacity: 0.65;
}
[data-theme="light"] .home-popular-grid .home-featured-card .item-title {
  color: #0f172a;
}
[data-theme="light"] .home-popular-grid .home-featured-card .item-desc {
  color: #526075;
}
[data-theme="light"] .item-card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border-color: rgba(15,23,42,0.10);
  box-shadow: 0 14px 34px rgba(15,23,42,0.06);
}
[data-theme="light"] .item-card:hover {
  border-color: rgb(var(--card-accent-rgb, 5 150 105) / 0.22);
  background: linear-gradient(180deg, #ffffff 0%, #f5faff 100%);
  box-shadow: 0 22px 44px rgba(15,23,42,0.10);
}
[data-theme="light"] .item-pill {
  background: rgba(255,255,255,0.9);
  border-color: rgba(15,23,42,0.08);
  color: #526075;
}
[data-theme="light"] .item-pill.tone {
  background: rgb(var(--card-accent-rgb, 5 150 105) / 0.10);
  border-color: rgb(var(--card-accent-rgb, 5 150 105) / 0.18);
  color: rgb(var(--card-accent-rgb, 5 150 105) / 0.95);
}
[data-theme="light"] .item-arrow {
  background: #ffffff;
  border-color: rgba(15,23,42,0.10);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card {
  position: relative;
  background: linear-gradient(180deg, #ffffff 0%, #f9fcff 100%);
  border-color: rgba(15,23,42,0.10);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card::before {
  background: linear-gradient(90deg, transparent, rgb(var(--tone-rgb, 34 197 94) / 0.9), transparent);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card:hover {
  box-shadow: 0 22px 46px rgba(15,23,42,0.10);
  border-color: rgb(var(--tone-rgb, 34 197 94) / 0.24);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-visual {
  background: linear-gradient(180deg, rgb(var(--tone-rgb, 34 197 94) / 0.10), rgba(255,255,255,0.94));
  border-color: rgb(var(--tone-rgb, 34 197 94) / 0.22);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-icon {
  background: rgb(var(--tone-rgb, 34 197 94) / 0.14);
  box-shadow: inset 0 0 0 1px rgb(var(--tone-rgb, 34 197 94) / 0.18);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-token {
  background: rgba(255,255,255,0.82);
  color: rgb(var(--tone-rgb, 34 197 94) / 0.92);
  border-color: rgb(var(--tone-rgb, 34 197 94) / 0.18);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-node {
  background: rgba(255,255,255,0.92);
  border-color: rgba(15,23,42,0.08);
  color: #0f172a;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-node-metaphor {
  background: rgb(var(--tone-rgb, 34 197 94) / 0.12);
  border-color: rgb(var(--tone-rgb, 34 197 94) / 0.22);
  color: rgb(var(--tone-rgb, 34 197 94) / 0.98);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-equals {
  background: rgb(var(--tone-rgb, 34 197 94) / 0.14);
  border-color: rgb(var(--tone-rgb, 34 197 94) / 0.18);
  color: rgb(var(--tone-rgb, 34 197 94) / 0.98);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-summary {
  color: #0f172a;
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-example {
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(246,249,253,0.98));
  border-color: rgb(var(--tone-rgb, 34 197 94) / 0.18);
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-example-text,
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-support {
  color: #475569;
}
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-example-text code,
[data-theme="light"] .home-beginner-grid .home-beginner-card .beginner-support code {
  background: rgba(255,255,255,0.96);
  border-color: rgb(var(--tone-rgb, 34 197 94) / 0.18);
  color: rgb(var(--tone-rgb, 34 197 94) / 0.98);
}
[data-theme="light"] .related-btn {
  background: #ffffff;
  border-color: rgba(15,23,42,0.10);
  color: #475569;
}
[data-theme="light"] .related-btn:hover {
  border-color: color-mix(in srgb, var(--lc, #059669) 22%, rgba(15,23,42,0.10));
  background: color-mix(in srgb, var(--lc, #059669) 8%, #ffffff);
  color: #0f172a;
}
[data-theme="light"] .programming-empty-state {
  background:
    radial-gradient(circle at top right, rgb(var(--card-accent-rgb) / 0.12), transparent 36%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border-color: rgb(var(--card-accent-rgb) / 0.18);
  box-shadow: 0 18px 42px rgba(15,23,42,0.10);
}
[data-theme="light"] .programming-empty-desc {
  color: #526075;
}
[data-theme="light"] .compare-card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border-color: rgb(var(--card-accent-rgb, 5 150 105) / 0.18);
  box-shadow: 0 16px 38px rgba(15,23,42,0.07);
}
[data-theme="light"] .compare-card-head {
  border-bottom-color: rgb(var(--card-accent-rgb, 5 150 105) / 0.18);
}
[data-theme="light"] .compare-card-tip,
[data-theme="light"] .compare-card-empty-text {
  color: #526075;
}
[data-theme="light"] .prompt-block {
  background: linear-gradient(180deg, #ffffff 0%, #fffaf2 100%);
  border-color: rgba(15,23,42,0.10);
  box-shadow: 0 16px 36px rgba(15,23,42,0.06);
}
[data-theme="light"] .prompt-header {
  background: linear-gradient(180deg, rgba(251,191,36,0.12), rgba(255,255,255,0.92));
}
[data-theme="light"] .prompt-body {
  color: #475569;
}
[data-theme="light"] .home-roadmap-grid .home-roadmap-card {
  background: linear-gradient(180deg, #ffffff 0%, #fffaf2 100%);
  border-color: rgba(245,158,11,0.16);
}
[data-theme="light"] .home-roadmap-grid .home-roadmap-card .roadmap-header {
  border-bottom-color: rgba(245,158,11,0.16);
}
[data-theme="light"] .home-roadmap-grid .home-roadmap-card .roadmap-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(245,158,11,0.12);
}
[data-theme="light"] .home-roadmap-grid .home-roadmap-card .roadmap-lang {
  color: #b45309;
}
[data-theme="light"] .home-roadmap-grid .home-roadmap-card .step-num {
  background: rgba(245,158,11,0.12);
  border-color: rgba(245,158,11,0.24);
  color: #b45309;
}
[data-theme="light"] .home-roadmap-grid .home-roadmap-card .roadmap-steps li {
  border-bottom-color: rgba(245,158,11,0.10);
}
[data-theme="light"] .compare-table td {
  border-bottom-color: rgba(15,23,42,0.06);
}
[data-theme="light"] .compare-table tr:hover td {
  background: #f8fbff;
}
[data-theme="light"] .item-card:hover {
  border-color: rgb(var(--card-accent-rgb, 5 150 105) / 0.22);
  background: linear-gradient(180deg, #ffffff 0%, #f5faff 100%);
}
[data-theme="light"] .back-to-top {
  background: rgba(255,255,255,0.94);
  color: #0f172a;
  border-color: rgba(15,23,42,0.16);
  box-shadow: 0 14px 30px rgba(15,23,42,0.12);
}
[data-theme="light"] #footer {
  background: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.88) 12%, rgba(247,250,253,0.98) 100%);
  border-top-color: rgba(15,23,42,0.10);
}
[data-theme="light"] .footer-brand p,
[data-theme="light"] .footer-bottom {
  color: #526075;
}
[data-theme="light"] .footer-col h4 {
  color: #334155;
}
[data-theme="light"] .footer-col a {
  color: #475569;
}
[data-theme="light"] .footer-col a:hover {
  color: #047857;
}
[data-theme="light"] .toast {
  background: #fff;
  border-color: rgba(15,23,42,0.12);
  box-shadow: 0 18px 40px rgba(15,23,42,0.12);
}
[data-theme="light"] .sidebar { background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%); border-color: #e5e7eb; }
[data-theme="light"] .detail-panel { background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%); border-color: #e5e7eb; }
[data-theme="light"] .item-card { background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%); border-color: #e5e7eb; }
[data-theme="light"] .beginner-card { background: #fff; border-color: #e5e7eb; }
[data-theme="light"] .roadmap-card { background: #fff; border-color: #e5e7eb; }

/* ── 테마 전환 버튼 ─────────────────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--txt-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease);
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--border-muted); color: var(--txt-secondary); }

/* ── 포커스 visible ──────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}
[data-theme="light"] :focus-visible {
  outline-color: #0284c7;
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(2,132,199,0.16);
}

/* ── 상단 이동 버튼 ─────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 400;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-overlay);
  border: 1px solid var(--border-muted);
  color: var(--txt-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(12px);
  transition: all var(--t-med) var(--ease);
  pointer-events: none;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}

/* ── 토스트 알림 ─────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 80px;
  right: 20px;
  z-index: 600;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  border-radius: var(--r-md);
  background: var(--bg-overlay);
  border: 1px solid var(--border-muted);
  color: var(--txt-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  animation: toastIn 0.3s var(--ease) forwards;
  pointer-events: auto;
  max-width: 320px;
}
.toast.success { border-color: rgba(79,255,176,0.4); }
.toast.success .toast-icon { color: var(--accent); }
.toast.error   { border-color: rgba(255,79,79,0.4); }
.toast.error .toast-icon   { color: var(--danger); }
@keyframes toastIn {
  from { opacity:0; transform: translateX(20px); }
  to   { opacity:1; transform: translateX(0); }
}
@keyframes toastOut {
  to { opacity:0; transform: translateX(20px); }
}

/* ── 인쇄 스타일 ─────────────────────────────────────── */
@media print {
  #nav, .sidebar, .filter-bar, .lang-tabbar,
  .back-to-top, .toast-container, #search-modal,
  .bookmark-btn, .share-btn, .theme-toggle,
  .code-copy-btn, .related-btn { display: none !important; }

  body { background: #fff; color: #000; }
  .detail-panel { border: none; box-shadow: none; }
  .detail-header { background: #f5f5f5 !important; }
  .code-block { border: 1px solid #ddd; break-inside: avoid; }
  pre { background: #f8f8f8 !important; color: #333 !important; }
  .content-grid { grid-template-columns: 1fr !important; }
  a[href]::after { content: " (" attr(href) ")"; font-size: .8em; color: #666; }
}