/* =============================================================================
   HackSkills - modern geek aesthetic, dual-theme stylesheet
   关键词: dual theme, light/dark, css variables, modern minimal, geek not hacker
   ============================================================================= */

/* -------------------------------------------------------------------------
   Theme tokens (light is default; dark via [data-theme="dark"])
   设计取向: Vercel/Linear/shadcn 风格 - 灰阶 + 单色 accent (emerald)
   ------------------------------------------------------------------------- */
:root,
[data-theme="light"] {
  --bg:        #ffffff;
  --bg-1:      #fafafa;
  --bg-2:      #f4f4f5;
  --bg-3:      #ececef;
  --fg:        #09090b;
  --fg-1:      #27272a;
  --fg-2:      #52525b;
  --fg-3:      #71717a;
  --fg-4:      #a1a1aa;
  --border:    #e4e4e7;
  --border-2:  #d4d4d8;
  --accent:        #059669;
  --accent-soft:   #d1fae5;
  --accent-hover:  #047857;
  --accent-fg:     #ffffff;
  --accent-text:   #047857;
  --warn:      #b45309;
  --danger:    #dc2626;
  --code-bg:   #f4f4f5;
  --code-fg:   #18181b;
  --shadow-1:  0 1px 2px rgba(0,0,0,0.04), 0 1px 1px rgba(0,0,0,0.02);
  --shadow-2:  0 4px 12px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-pop:0 12px 32px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.05);
  --grid-dot:  rgba(0,0,0,0.07);
  --selection: rgba(5, 150, 105, 0.18);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg:        #0a0a0a;
  --bg-1:      #0f0f10;
  --bg-2:      #161618;
  --bg-3:      #1c1c1f;
  --fg:        #f4f4f5;
  --fg-1:      #e4e4e7;
  --fg-2:      #a1a1aa;
  --fg-3:      #71717a;
  --fg-4:      #52525b;
  --border:    #27272a;
  --border-2:  #3f3f46;
  --accent:        #10b981;
  --accent-soft:   rgba(16, 185, 129, 0.12);
  --accent-hover:  #34d399;
  --accent-fg:     #052e26;
  --accent-text:   #34d399;
  --warn:      #f59e0b;
  --danger:    #ef4444;
  --code-bg:   #161618;
  --code-fg:   #e4e4e7;
  --shadow-1:  0 1px 2px rgba(0,0,0,0.4), 0 1px 1px rgba(0,0,0,0.3);
  --shadow-2:  0 4px 16px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-pop:0 16px 48px rgba(0,0,0,0.65), 0 2px 8px rgba(0,0,0,0.4);
  --grid-dot:  rgba(255,255,255,0.05);
  --selection: rgba(16, 185, 129, 0.30);
  color-scheme: dark;
}

/* Theme transition - smooth swap */
:root {
  --t: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}
* {
  box-sizing: border-box;
}
html, body, .nav, .card, .install-card, .codebox, .chip, .cat-item, .toolbar,
.hero-search, .toolbar-search, .install-tab, .badge, .icon-btn, .copy-btn {
  transition: background-color var(--t), color var(--t), border-color var(--t), box-shadow var(--t);
}

/* -------------------------------------------------------------------------
   Base
   ------------------------------------------------------------------------- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Monaco, Consolas,
               "Liberation Mono", monospace;
}
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
body { min-height: 100vh; overflow-x: hidden; }

::selection { background: var(--selection); color: var(--fg); }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t), border-color var(--t);
}
a:hover { color: var(--accent-text); }

button {
  font-family: inherit;
  cursor: pointer;
}

code, pre, kbd {
  font-family: var(--font-mono);
  font-size: 13px;
}

kbd {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--bg-1);
  color: var(--fg-2);
  font-size: 11px;
  line-height: 1.4;
  vertical-align: 2px;
}

.kbd-inline {
  padding: 0 5px;
  font-size: 11px;
  vertical-align: 0;
}

.skip-link {
  position: absolute; left: -9999px; top: -9999px;
}
.skip-link:focus {
  left: 1rem; top: 1rem;
  padding: .5rem .75rem;
  background: var(--bg);
  border: 1px solid var(--accent);
  color: var(--accent-text);
  border-radius: 6px;
  z-index: 1000;
}

/* -------------------------------------------------------------------------
   Ambient canvas grid (drawn by matrix.js)
   ------------------------------------------------------------------------- */
#ambient-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: .7;
}

/* -------------------------------------------------------------------------
   Nav
   ------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 600;
  letter-spacing: -.01em;
}
.brand-mark {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
}
.brand-text { font-size: 15px; }
.brand-dot { color: var(--accent); }

.nav-links {
  display: inline-flex;
  gap: 4px;
  justify-self: center;
  align-items: center;
}
.nav-links a {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--fg-2);
  font-weight: 500;
  letter-spacing: -.005em;
}
.nav-links a:hover {
  color: var(--fg);
  background: var(--bg-2);
}

.nav-actions {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.icon-btn {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg-2);
  position: relative;
}
.icon-btn:hover {
  color: var(--fg);
  background: var(--bg-2);
  border-color: var(--border);
}
.theme-toggle .ico {
  position: absolute;
  width: 18px;
  height: 18px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 150ms ease;
}
[data-theme-pref="light"]  .theme-toggle .ico-light  { opacity: 1; }
[data-theme-pref="dark"]   .theme-toggle .ico-dark   { opacity: 1; }
[data-theme-pref="system"] .theme-toggle .ico-system { opacity: 1; }

/* -------------------------------------------------------------------------
   Hero
   关键词: hero with background image, dual-theme veil, marquee ticker
   ------------------------------------------------------------------------- */
.hero {
  position: relative;
  z-index: 1;
  padding: 80px 24px 0;
  overflow: hidden;
  isolation: isolate;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 920px;
  margin: 0 auto;
  padding-bottom: 48px;
  text-align: center;
}

/* 背景图层 - 跟随主题调整滤镜与不透明度 */
/* 关键词: hero background image layer, theme-aware filter */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  transition: opacity 240ms ease, filter 240ms ease;
  user-select: none;
  -webkit-user-drag: none;
}
[data-theme="light"] .hero-bg-img {
  opacity: 0.20;
  filter: saturate(0.78) contrast(1.04);
}
[data-theme="dark"] .hero-bg-img {
  opacity: 0.36;
  filter: saturate(1.10) contrast(1.12) brightness(0.78);
}

/* 蒙层: 中央径向柔光 + 上下线性渐变融入背景, 保证文本对比度 */
/* 关键词: hero veil, radial spotlight, gradient blend */
.hero-bg-veil {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse 70% 70% at 50% 45%,
      color-mix(in srgb, var(--bg) 72%, transparent) 0%,
      color-mix(in srgb, var(--bg) 35%, transparent) 50%,
      transparent 100%
    ),
    linear-gradient(
      180deg,
      var(--bg) 0%,
      color-mix(in srgb, var(--bg) 30%, transparent) 22%,
      color-mix(in srgb, var(--bg) 30%, transparent) 70%,
      var(--bg) 100%
    );
}

/* 细微噪点纹理, 让蒙层不显得平 (svg data-uri 极轻量) */
/* 关键词: subtle film grain, css noise overlay */
.hero-bg-noise {
  position: absolute;
  inset: 0;
  opacity: .35;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  background-size: 160px 160px;
}
[data-theme="light"] .hero-bg-noise { opacity: .15; mix-blend-mode: multiply; }

.badge-row {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 28px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--bg-1);
  color: var(--fg-2);
  border-radius: 999px;
  letter-spacing: -.005em;
}
.badge-soft {
  border-color: var(--accent-soft);
  background: var(--accent-soft);
  color: var(--accent-text);
}
.badge-ghost {
  border-color: transparent;
  color: var(--fg-3);
  background: transparent;
}

.hero-title {
  margin: 0 0 16px;
  font-size: clamp(34px, 5.4vw, 56px);
  line-height: 1.05;
  letter-spacing: -.025em;
  font-weight: 700;
}
.hero-title-dim { color: var(--fg-3); }

.hero-sub {
  margin: 0 auto 32px;
  max-width: 640px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--fg-2);
  letter-spacing: -.005em;
}

.hero-search {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 580px;
  margin: 0 auto;
  background: color-mix(in srgb, var(--bg-1) 86%, transparent);
  border: 1px solid var(--border-2);
  border-radius: 12px;
  padding: 10px 14px;
  box-shadow: var(--shadow-2);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}
.hero-search:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--border-2)); }
.hero-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-2);
}
.search-icon {
  color: var(--fg-3);
  display: inline-flex;
  flex-shrink: 0;
}
.hero-search input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--fg);
  font: inherit;
  font-size: 15.5px;
  letter-spacing: -.005em;
  padding: 4px 0;
  min-width: 0;
}
.hero-search input::placeholder { color: var(--fg-3); }
.kbd-hint {
  flex-shrink: 0;
  font-size: 11px;
  color: var(--fg-3);
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 1px 7px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

.hero-meta {
  margin-top: 18px;
  font-size: 12.5px;
  color: var(--fg-3);
  letter-spacing: -.005em;
}
.hero-meta .dot-sep { margin: 0 .35em; color: var(--fg-4); }
.hero-meta span { white-space: nowrap; }

/* -------------------------------------------------------------------------
   Hero Skills Marquee — 自滚动跑马灯, 展示精选 skills 与仓库内容联动
   关键词: skills marquee ticker, infinite horizontal scroll, click-to-filter
   ------------------------------------------------------------------------- */
.hero-marquee {
  position: relative;
  z-index: 2;
  margin-top: 12px;
  padding: 18px 0 36px;
  overflow: hidden;
}
.marquee-fade {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 100px;
  z-index: 2;
  pointer-events: none;
}
.marquee-fade-l {
  left: 0;
  background: linear-gradient(90deg, var(--bg) 0%, transparent 100%);
}
.marquee-fade-r {
  right: 0;
  background: linear-gradient(-90deg, var(--bg) 0%, transparent 100%);
}
.marquee-track {
  display: inline-flex;
  gap: 10px;
  white-space: nowrap;
  will-change: transform;
  animation: marquee-scroll 160s linear infinite;
}
.hero-marquee:hover .marquee-track,
.hero-marquee:focus-within .marquee-track {
  animation-play-state: paused;
}
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* 双行内容: row-1 = badge + skill id + 行数, row-2 = 分类 + 摘要 + 标签
   关键词: marquee chip two-row, skill summary tags */
.marquee-chip {
  flex-shrink: 0;
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: 5px;
  padding: 11px 14px;
  min-width: 320px;
  max-width: 480px;
  background: color-mix(in srgb, var(--bg-1) 86%, transparent);
  border: 1px solid var(--border);
  color: var(--fg-1);
  border-radius: 10px;
  letter-spacing: -.005em;
  cursor: pointer;
  text-decoration: none;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease, transform 120ms ease;
}
.marquee-chip:hover {
  background: var(--accent-soft);
  color: var(--accent-text);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.marquee-chip .chip-row-1 {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
}
.marquee-chip .chip-mark {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--fg-3);
  padding: 2px 7px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--bg-2) 75%, transparent);
  border: 1px solid var(--border);
}
.marquee-chip .chip-id {
  color: var(--fg);
  flex: 1;
  min-width: 0;
  text-overflow: ellipsis;
  overflow: hidden;
}
.marquee-chip .chip-metric {
  margin-left: auto;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--fg-3);
  letter-spacing: .02em;
}
.marquee-chip .chip-row-2 {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: 400;
  color: var(--fg-3);
  white-space: nowrap;
  overflow: hidden;
}
.marquee-chip .chip-cat {
  color: var(--fg-2);
  font-weight: 500;
  flex-shrink: 0;
  max-width: 160px;
  text-overflow: ellipsis;
  overflow: hidden;
}
.marquee-chip .chip-sep {
  color: var(--fg-4);
  flex-shrink: 0;
}
.marquee-chip .chip-tag {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--fg-2);
  padding: 1px 6px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--bg-2) 60%, transparent);
  border: 1px solid var(--border);
}
.marquee-chip .chip-summary {
  flex: 1;
  min-width: 0;
  text-overflow: ellipsis;
  overflow: hidden;
}
.marquee-chip[data-tier="master"]   .chip-mark {
  color: var(--warn);
  border-color: color-mix(in srgb, var(--warn) 45%, var(--border));
  background: color-mix(in srgb, var(--warn) 12%, transparent);
}
.marquee-chip[data-tier="category"] .chip-mark {
  color: var(--accent-text);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: var(--accent-soft);
}
.marquee-chip:hover .chip-mark,
.marquee-chip:hover .chip-id,
.marquee-chip:hover .chip-cat,
.marquee-chip:hover .chip-tag,
.marquee-chip:hover .chip-summary,
.marquee-chip:hover .chip-metric { color: inherit; }
.marquee-chip:hover .chip-mark { border-color: currentColor; background: transparent; opacity: .85; }
.marquee-chip:hover .chip-tag  { border-color: currentColor; background: transparent; opacity: .8; }

/* -------------------------------------------------------------------------
   Section heads + Install card
   ------------------------------------------------------------------------- */
.section-head {
  max-width: 1240px;
  margin: 0 auto 24px;
  padding: 0 24px;
}
.section-head h2 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.02em;
}
.section-head p {
  margin: 0;
  font-size: 14.5px;
  color: var(--fg-2);
  max-width: 720px;
  letter-spacing: -.005em;
}

.install {
  position: relative;
  z-index: 1;
  padding: 28px 0 36px;
}
.install-card {
  max-width: 1040px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-1);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.install-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 8px 8px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.install-tab {
  background: transparent;
  border: 0;
  padding: 10px 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--fg-3);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 120ms ease, border-color 120ms ease;
  letter-spacing: -.005em;
}
.install-tab:hover { color: var(--fg-1); }
.install-tab[aria-selected="true"] {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

.install-panel {
  padding: 22px 26px 24px;
}
.install-panel[hidden] { display: none; }

.panel-lead {
  margin: 0 0 16px;
  font-size: 14.5px;
  color: var(--fg-1);
  letter-spacing: -.005em;
}
.panel-foot {
  margin: 14px 0 0;
  font-size: 12.5px;
  letter-spacing: -.005em;
}
.dim { color: var(--fg-3); }
code, .panel-lead code, .panel-foot code {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1.5px 6px;
  border-radius: 4px;
  font-size: .92em;
}

.codebox {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 110px 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--fg-1);
  word-break: break-all;
  overflow-wrap: anywhere;
}
.codebox > code {
  flex: 1;
  background: transparent;
  padding: 0;
  font: inherit;
  color: inherit;
}
.cmd-prompt {
  color: var(--accent-text);
  font-weight: 600;
  flex-shrink: 0;
  user-select: none;
}
.cmd-arg {
  color: var(--accent-text);
  font-weight: 500;
}

.copy-btn {
  position: absolute;
  right: 10px;
  top: 10px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  color: var(--fg-2);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 6px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.copy-btn:hover {
  color: var(--fg);
  border-color: var(--border-2);
}
.copy-btn[data-copied="1"] {
  color: var(--accent-text);
  border-color: var(--accent);
  background: var(--accent-soft);
}
.copy-btn-sm { padding: 3px 8px; font-size: 11px; }

.select-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.select-label {
  font-size: 12.5px;
  color: var(--fg-3);
  letter-spacing: -.005em;
  flex-shrink: 0;
  font-weight: 500;
}
.select {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font: inherit;
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 7px 10px;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--fg-3) 50%),
    linear-gradient(-45deg, transparent 50%, var(--fg-3) 50%);
  background-position:
    calc(100% - 14px) 50%,
    calc(100% - 9px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 28px;
}
.select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.kv-rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.kv-row {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
}
.kv-key {
  color: var(--fg-3);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: -.005em;
}
.kv-val {
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: transparent;
  padding: 0;
  word-break: break-all;
  overflow-wrap: anywhere;
}
.kv-link { color: var(--accent-text); }
.kv-link:hover { text-decoration: underline; }

/* -------------------------------------------------------------------------
   Browse: toolbar + sidebar + cards
   ------------------------------------------------------------------------- */
.browse {
  position: relative;
  z-index: 1;
  padding: 28px 0 64px;
}

.toolbar {
  position: sticky;
  top: 60px;
  z-index: 10;
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 24px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.toolbar-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-width: 520px;
  transition: border-color 120ms ease;
}
.toolbar-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.toolbar-search input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  font: inherit;
  font-size: 13.5px;
  color: var(--fg);
  letter-spacing: -.005em;
  min-width: 0;
}
.toolbar-search input::placeholder { color: var(--fg-3); }
.search-clear {
  background: transparent;
  border: 0;
  color: var(--fg-3);
  display: inline-flex;
  align-items: center;
  visibility: hidden;
  padding: 0;
}
.search-clear:hover { color: var(--fg); }
.toolbar-search.has-text .search-clear { visibility: visible; }

.filter-chips {
  display: inline-flex;
  gap: 4px;
  padding: 3px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.chip {
  padding: 5px 12px;
  font-size: 12.5px;
  font-weight: 500;
  background: transparent;
  color: var(--fg-2);
  border: 1px solid transparent;
  border-radius: 6px;
  letter-spacing: -.005em;
  transition: all 120ms ease;
}
.chip:hover { color: var(--fg); }
.chip[aria-pressed="true"] {
  background: var(--bg);
  color: var(--fg);
  border-color: var(--border);
  box-shadow: var(--shadow-1);
}

.toolbar-counter {
  font-size: 12.5px;
  color: var(--fg-3);
  font-family: var(--font-mono);
  letter-spacing: -.005em;
  white-space: nowrap;
}
.toolbar-counter strong { color: var(--fg); font-weight: 600; }

.layout {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
}

.sidebar {
  position: sticky;
  top: 130px;
  align-self: flex-start;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-2) transparent;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }

.sidebar-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-3);
  padding: 0 8px 8px;
}

.category-nav {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.cat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  border: 0;
  background: transparent;
  font-size: 13.5px;
  color: var(--fg-2);
  text-align: left;
  font: inherit;
  border-radius: 6px;
  letter-spacing: -.005em;
  transition: all 100ms ease;
  min-width: 0;
}
.cat-item:hover {
  background: var(--bg-2);
  color: var(--fg);
}
.cat-item[aria-selected="true"] {
  background: var(--bg-2);
  color: var(--fg);
  font-weight: 500;
}
.cat-item .cat-name {
  display: flex;
  gap: 8px;
  align-items: baseline;
  min-width: 0;
  overflow: hidden;
}
.cat-item .cat-num {
  color: var(--fg-4);
  font-family: var(--font-mono);
  font-size: 11px;
  flex-shrink: 0;
}
.cat-item .cat-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cat-item .cat-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  flex-shrink: 0;
}
.cat-item[aria-selected="true"] .cat-count { color: var(--accent-text); }

/* -------------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------------- */
.results { min-height: 60vh; position: relative; }
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 14px;
}

.cat-section-header {
  grid-column: 1 / -1;
  margin-top: 24px;
  margin-bottom: 4px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}
.cat-section-header:first-child { margin-top: 0; }
.cat-section-header .h-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-4);
}
.cat-section-header .h-name {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -.015em;
  color: var(--fg);
}
.cat-section-header .h-count {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 8px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--fg-2);
}
.cat-section-header .h-desc {
  color: var(--fg-3);
  font-size: 13px;
  letter-spacing: -.005em;
}

.card {
  position: relative;
  border: 1px solid var(--border);
  background: var(--bg-1);
  padding: 14px 16px 12px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  outline: none;
  cursor: pointer;
  box-shadow: var(--shadow-1);
}
.card:hover, .card:focus-visible {
  border-color: var(--border-2);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}
.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.card-tier {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .02em;
  padding: 1px 7px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--fg-2);
  border-radius: 4px;
  text-transform: uppercase;
}
.card-tier[data-tier="master"] {
  border-color: color-mix(in srgb, var(--warn) 35%, var(--border));
  background: color-mix(in srgb, var(--warn) 12%, transparent);
  color: var(--warn);
}
.card-tier[data-tier="category"] {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  background: var(--accent-soft);
  color: var(--accent-text);
}
.card-cat-label {
  font-size: 11.5px;
  color: var(--fg-3);
  letter-spacing: -.005em;
}

.card-title {
  margin: 4px 0 0;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: -.015em;
  line-height: 1.3;
  color: var(--fg);
}
.card-title-link { color: var(--fg); }
.card-title-link:hover { color: var(--accent-text); }

.card-id {
  font-size: 11px;
  color: var(--fg-3);
  background: transparent;
  padding: 0;
  word-break: break-all;
}

.card-desc {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--fg-2);
  line-height: 1.5;
  letter-spacing: -.005em;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-desc:empty::before {
  content: "no description.";
  color: var(--fg-4);
  font-style: italic;
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--fg-3);
  gap: 8px;
}
.card-stats { display: inline-flex; gap: 12px; align-items: center; }
.card-stat  { display: inline-flex; align-items: center; gap: 4px; }

.card-actions { display: inline-flex; align-items: center; gap: 8px; }
.card-copy {
  background: transparent;
  border: 1px solid transparent;
  color: var(--fg-3);
  font-family: inherit;
  font-size: 11.5px;
  padding: 3px 7px;
  border-radius: 5px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 120ms ease;
}
.card-copy:hover {
  color: var(--fg-1);
  background: var(--bg-2);
  border-color: var(--border);
}
.card-copy[data-copied="1"] {
  color: var(--accent-text);
  background: var(--accent-soft);
  border-color: var(--accent);
}
.card-open {
  color: var(--fg-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.card-open:hover { color: var(--accent-text); }

mark {
  background: var(--accent-soft);
  color: var(--accent-text);
  padding: 0 .15em;
  border-radius: 3px;
  font-weight: 500;
}

/* -------------------------------------------------------------------------
   States
   ------------------------------------------------------------------------- */
.state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 64px 16px;
  color: var(--fg-3);
}
.state-icon { color: var(--fg-4); }
.state-title { font-size: 16px; color: var(--fg-1); font-weight: 600; letter-spacing: -.01em; }
.state-sub   { font-size: 13.5px; color: var(--fg-3); }
.state-error .state-title { color: var(--danger); }
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 32px;
  background: var(--bg);
}
.foot-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
}
.foot-brand { display: inline-flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.foot-brand .sep { color: var(--fg-4); }
.foot-links { display: inline-flex; gap: 16px; flex-wrap: wrap; }
.foot-links a { color: var(--fg-2); }
.foot-links a:hover { color: var(--fg); }

/* -------------------------------------------------------------------------
   Toast (copy feedback)
   ------------------------------------------------------------------------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 8px 14px;
  background: var(--fg);
  color: var(--bg);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -.005em;
  box-shadow: var(--shadow-pop);
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms ease, transform 200ms ease;
  z-index: 100;
}
.toast.toast-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* -------------------------------------------------------------------------
   Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 880px) {
  .nav-links { display: none; }
  .layout { grid-template-columns: 1fr; gap: 18px; }
  .sidebar {
    position: static; max-height: none; overflow: visible;
    padding: 0;
  }
  .category-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
    overflow-x: auto;
  }
  .cat-item { flex: 0 0 auto; }
  .toolbar { grid-template-columns: 1fr; padding: 10px 16px; }
  .toolbar-counter { display: none; }
}

@media (max-width: 640px) {
  .nav-inner { padding: 0 16px; gap: 12px; }
  .hero { padding: 56px 16px 0; }
  .hero-inner { padding-bottom: 32px; }
  .hero-title { font-size: clamp(28px, 7vw, 38px); }
  .hero-sub { font-size: 15px; }
  /* 移动端蒙层加重, 因为图被裁到只剩中段, 否则容易喧宾夺主 */
  /* 关键词: mobile veil intensity */
  [data-theme="light"] .hero-bg-img { opacity: 0.14; }
  [data-theme="dark"]  .hero-bg-img { opacity: 0.28; }
  .hero-bg-img { object-position: center 42%; }
  .marquee-fade { width: 50px; }
  .marquee-chip {
    min-width: 240px;
    max-width: 320px;
    padding: 9px 12px;
    gap: 4px;
  }
  .marquee-chip .chip-row-1 { font-size: 12px; gap: 7px; }
  .marquee-chip .chip-row-2 { font-size: 11px; gap: 6px; }
  .marquee-chip .chip-mark { font-size: 9.5px; padding: 1px 6px; }
  .marquee-chip .chip-cat { max-width: 110px; }
  .hero-marquee { padding: 14px 0 26px; }
  .install-panel { padding: 18px 18px 20px; }
  .codebox { padding: 12px 80px 12px 14px; font-size: 12.5px; }
  .copy-btn { right: 8px; top: 8px; padding: 4px 8px; }
  .kv-row { grid-template-columns: 1fr; gap: 4px; padding: 10px 12px; }
  .kv-key { font-size: 11px; }
  .layout { padding: 16px; }
  .foot-inner { padding: 18px 16px; }
  .foot-brand, .foot-links { width: 100%; justify-content: flex-start; }
}

/* -------------------------------------------------------------------------
   Nav download button (ZIP shortcut) + generic .btn primitives
   关键词: nav download zip button, btn primary ghost link
   ------------------------------------------------------------------------- */
.nav-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 11px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--accent-text);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  border-radius: 8px;
  cursor: pointer;
  transition: background-color var(--t), color var(--t), border-color var(--t), transform 100ms ease;
}
.nav-download-btn:hover {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.nav-download-btn svg { flex-shrink: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg-1);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--t), color var(--t), border-color var(--t), transform 100ms ease;
}
.btn:hover {
  background: var(--bg-2);
  border-color: var(--border-2);
  color: var(--fg);
}
.btn.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}
.btn.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--accent-fg);
  transform: translateY(-1px);
}
.btn.btn-link {
  border-color: transparent;
  background: transparent;
  color: var(--accent-text);
  padding: 8px 8px;
}
.btn.btn-link:hover {
  background: var(--accent-soft);
  color: var(--accent-text);
}
.btn .dim { font-weight: 400; opacity: .75; }

/* -------------------------------------------------------------------------
   Install panel: ZIP archive layout (password box + reason box + actions)
   关键词: zip panel layout, password disclosure, anti-AV reason
   ------------------------------------------------------------------------- */
.install-tab.install-tab-zip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.zip-grid {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  gap: 14px;
  margin-bottom: 16px;
}
.zip-pwd-box {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.zip-pwd-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--fg-3);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.zip-pwd-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.zip-pwd-row code {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: .02em;
  flex: 1;
  user-select: all;
  word-break: break-all;
}
.zip-pwd-row .copy-btn {
  position: static;
  flex-shrink: 0;
}
.zip-pwd-note {
  font-size: 11.5px;
  line-height: 1.45;
}
.zip-pwd-note strong { color: var(--warn); font-weight: 600; }

.zip-reason-box {
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
  border-radius: 10px;
  padding: 14px 16px;
}
.zip-reason-title {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-text);
  margin-bottom: 8px;
}
.zip-reason-box ul {
  margin: 0;
  padding-left: 18px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--fg-2);
}
.zip-reason-box li { margin: 4px 0; }
.zip-reason-box code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  background: var(--bg-2);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--fg-1);
}
.zip-reason-box strong { color: var(--warn); font-weight: 600; }

.zip-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

/* -------------------------------------------------------------------------
   ZIP download modal — surfaces the public password before any actual click
   关键词: zip modal backdrop card, password notice, AES256 explanation
   ------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: color-mix(in srgb, var(--bg) 65%, transparent);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  animation: modal-fade-in 180ms ease;
}
.modal-backdrop[hidden] { display: none !important; }
@keyframes modal-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.modal-card {
  position: relative;
  width: 100%;
  max-width: 560px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 28px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 24px 60px -12px rgba(0,0,0,0.45),
              0 8px 16px -8px rgba(0,0,0,0.25);
  animation: modal-pop-in 200ms cubic-bezier(.2,.7,.3,1);
}
@keyframes modal-pop-in {
  from { transform: translateY(8px) scale(.97); opacity: 0; }
  to   { transform: translateY(0) scale(1);   opacity: 1; }
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: var(--fg-3);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color var(--t), color var(--t);
}
.modal-close:hover {
  background: var(--bg-2);
  color: var(--fg);
}
.modal-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent-text);
  border-radius: 10px;
  margin-bottom: 14px;
}
.modal-card h3 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--fg);
}
.modal-sub {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.5;
}

.modal-pwd {
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 14px;
}
.modal-pwd-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--fg-3);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.modal-pwd-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.modal-pwd-row code {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: .02em;
  flex: 1;
  user-select: all;
  word-break: break-all;
}
.modal-pwd-row .copy-btn,
.modal-pwd-row .copy-btn-lg {
  position: static;
  flex-shrink: 0;
  padding: 6px 12px;
  font-size: 12px;
}

.modal-reason {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 16px;
}
.modal-reason-title {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-text);
  margin-bottom: 8px;
}
.modal-reason ul {
  margin: 0;
  padding-left: 18px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--fg-2);
}
.modal-reason li { margin: 4px 0; }
.modal-reason code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  background: var(--bg-2);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--fg-1);
}
.modal-reason strong { color: var(--warn); font-weight: 600; }

.modal-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--fg-3);
  margin-bottom: 14px;
  padding: 10px 14px;
  border: 1px dashed var(--border);
  border-radius: 8px;
}
.modal-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.modal-meta-key {
  color: var(--fg-4);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 10px;
  font-weight: 600;
}
.modal-meta code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-1);
}

.modal-codebox {
  font-size: 12px;
  margin-bottom: 12px;
}

.modal-foot {
  font-size: 12px;
  margin: 0;
  line-height: 1.5;
}
.modal-foot code {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-2);
  padding: 1px 5px;
  border-radius: 3px;
}

@media (max-width: 640px) {
  .nav-download-btn span { display: none; }
  .nav-download-btn { padding: 0 9px; }
  .zip-grid { grid-template-columns: 1fr; gap: 10px; }
  .zip-pwd-row code { font-size: 16px; }
  .modal-card { padding: 22px 18px; max-height: calc(100vh - 24px); border-radius: 12px; }
  .modal-pwd-row code { font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; transition-duration: 1ms !important; }
}