/* =============================================================================
   HackBenchmark - academic amber+zinc dual theme
   关键词: dual theme, papers-with-code aesthetic, amber accent, tabular-nums table
   ============================================================================= */

/* -------------------------------------------------------------------------
   Theme tokens (light default; dark via [data-theme="dark"])
   设计取向: arXiv / Papers with Code / academic preprint
   accent = amber-600/500, surface = warm zinc / stone
   ------------------------------------------------------------------------- */
:root,
[data-theme="light"] {
  --bg:        #fafaf9;   /* stone-50 */
  --bg-1:      #f5f5f4;
  --bg-2:      #e7e5e4;
  --bg-3:      #d6d3d1;
  --fg:        #1c1917;
  --fg-1:      #292524;
  --fg-2:      #57534e;
  --fg-3:      #78716c;
  --fg-4:      #a8a29e;
  --border:    #e7e5e4;
  --border-2:  #d6d3d1;
  --hairline:  #e7e5e4;

  --accent:        #d97706;     /* amber-600 */
  --accent-soft:   #fef3c7;
  --accent-hover:  #b45309;
  --accent-fg:     #ffffff;
  --accent-text:   #92400e;

  --good:      #15803d;
  --warn:      #b45309;
  --danger:    #b91c1c;
  --code-bg:   #f5f5f4;
  --code-fg:   #1c1917;

  --shadow-1:  0 1px 2px rgba(28,25,23,0.05), 0 1px 1px rgba(28,25,23,0.02);
  --shadow-2:  0 6px 14px rgba(28,25,23,0.06), 0 1px 3px rgba(28,25,23,0.04);
  --shadow-pop:0 16px 40px rgba(28,25,23,0.10), 0 2px 6px rgba(28,25,23,0.05);
  --selection: rgba(217, 119, 6, 0.20);

  /* heatmap gradient stops (light theme) */
  --hm-0:   #f5f5f4;
  --hm-30:  #fde68a;
  --hm-60:  #f59e0b;
  --hm-100: #b45309;

  color-scheme: light;
}

[data-theme="dark"] {
  --bg:        #0c0a09;   /* stone-950 */
  --bg-1:      #14110f;
  --bg-2:      #1c1917;   /* stone-900 */
  --bg-3:      #292524;   /* stone-800 */
  --fg:        #fafaf9;
  --fg-1:      #e7e5e4;
  --fg-2:      #a8a29e;
  --fg-3:      #78716c;
  --fg-4:      #57534e;
  --border:    #292524;
  --border-2:  #44403c;
  --hairline:  rgba(231, 229, 228, 0.06);

  --accent:        #f59e0b;     /* amber-500 */
  --accent-soft:   rgba(245, 158, 11, 0.12);
  --accent-hover:  #fbbf24;
  --accent-fg:     #1c1209;
  --accent-text:   #fbbf24;

  --good:      #4ade80;
  --warn:      #fbbf24;
  --danger:    #f87171;
  --code-bg:   #1c1917;
  --code-fg:   #e7e5e4;

  --shadow-1:  0 1px 2px rgba(0,0,0,0.45), 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);
  --selection: rgba(245, 158, 11, 0.32);

  --hm-0:   #1c1917;
  --hm-30:  #78350f;
  --hm-60:  #d97706;
  --hm-100: #fbbf24;

  color-scheme: dark;
}

:root {
  --t: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}
* { box-sizing: border-box; }

html, body, .nav, .preview-banner, .sidebar, .main, .rank-table, .hero,
.weights-bar, .heatmap-grid, .drawer, .std-card, .btn, .icon-btn, .copy-btn,
.toast, .hero-search, .view-tab, .sb-item {
  transition: background-color var(--t), color var(--t),
              border-color var(--t), box-shadow var(--t);
}

/* -------------------------------------------------------------------------
   Base typography - preprint / academic feel
   关键词: tabular-nums, inter + jetbrains mono, ss feature flags
   ------------------------------------------------------------------------- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-serif: ui-serif, "Charter", "Iowan Old Style", "Source Serif Pro", Georgia, 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: 14.5px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11", "cv05";
}
body { min-height: 100vh; overflow-x: hidden; }

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

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

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

code, pre, kbd, samp {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-variant-ligatures: none;
}

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;
}

.dim { color: var(--fg-3); }
.sep { margin: 0 6px; opacity: .6; }
.hidden { display: none !important; }

/* -------------------------------------------------------------------------
   Preview banner (sticky on top, mock disclaimer)
   ------------------------------------------------------------------------- */
.preview-banner {
  position: relative;
  z-index: 60;
  background: var(--accent-soft);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
[data-theme="dark"] .preview-banner {
  background: color-mix(in srgb, var(--accent) 14%, var(--bg));
  border-bottom-color: color-mix(in srgb, var(--accent) 24%, transparent);
}
.preview-banner-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 9px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--accent-text);
}
.preview-banner-tag {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: 3px;
  background: var(--accent);
  color: var(--accent-fg);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .08em;
}
.preview-banner-text { flex: 1; }
.preview-banner-text a { text-decoration: underline; text-underline-offset: 3px; }
.preview-banner-close {
  background: transparent;
  border: 0;
  color: var(--accent-text);
  padding: 4px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: .65;
}
.preview-banner-close:hover { opacity: 1; background: rgba(0,0,0,0.05); }
[data-theme="dark"] .preview-banner-close:hover { background: rgba(255,255,255,0.05); }
.preview-banner.hidden { display: none; }

/* -------------------------------------------------------------------------
   Nav
   ------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  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); }
.brand-version {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--fg-3);
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  margin-left: 4px;
  font-weight: 500;
}

.nav-links {
  display: inline-flex;
  gap: 2px;
  justify-self: center;
  align-items: center;
}
.nav-links a {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13.5px;
  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: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  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 (compact academic abstract; data is the focal point, hero is index)
   关键词: hero compact, citation-block style, stat strip, lean intro
   ------------------------------------------------------------------------- */
.hero {
  padding: 24px 24px 18px;
  border-bottom: 1px solid var(--hairline);
}
.hero-inner {
  max-width: 1320px;
  margin: 0 auto;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 11.5px;
  color: var(--fg-3);
}
.hero-tag-protocol {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-text);
}
.hero-tag-code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--fg-1);
}
.hero-tag-sep { opacity: .5; }
.hero-tag-build { font-family: var(--font-mono); font-size: 11px; }

.hero-title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.18;
  letter-spacing: -0.018em;
  font-weight: 600;
  color: var(--fg);
}

.hero-sub {
  margin: 6px 0 0;
  max-width: 82ch;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--fg-2);
}
.hero-sub a {
  color: var(--accent-text);
  border-bottom: 1px dotted color-mix(in srgb, var(--accent) 50%, transparent);
}
.hero-sub a:hover { border-bottom-style: solid; }

.hero-stats {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  max-width: 720px;
}
.hero-stat {
  background: var(--bg);
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.hero-stat-num {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}
.hero-stat-label {
  font-size: 10.5px;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* -- toolbar search (moved from hero, sits above weights bar in main column) -- */
.toolbar-search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: 6px;
  height: 36px;
  margin-top: 12px;
}
.toolbar-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.toolbar-search .search-icon { color: var(--fg-3); display: inline-flex; }
.toolbar-search input {
  flex: 1;
  border: 0;
  background: transparent;
  outline: 0;
  color: var(--fg);
  font-size: 13px;
  font-family: var(--font-sans);
}
.toolbar-search input::placeholder { color: var(--fg-3); }
.kbd-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--fg-3);
}

/* -------------------------------------------------------------------------
   Leaderboard layout (sidebar + main)
   关键词: 280px sidebar, sticky main, two-column grid
   ------------------------------------------------------------------------- */
.leaderboard { padding: 32px 24px 48px; }
.leaderboard .layout {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 32px;
}

@media (max-width: 1000px) {
  .leaderboard .layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* -------- sidebar -------- */
.sidebar {
  position: sticky;
  top: 72px;
  align-self: start;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  padding: 4px 4px 24px;
  font-size: 13px;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }

.sidebar-section {
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
}
.sidebar-section:last-child { border-bottom: 0; }
.sidebar-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--fg-3);
  margin-bottom: 10px;
}
.sidebar-count {
  font-weight: 500;
  color: var(--fg-4);
  letter-spacing: 0;
}

.view-tabs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3px;
}
.view-tab {
  text-align: left;
  padding: 8px 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--fg-2);
  font-size: 13.5px;
  font-weight: 500;
}
.view-tab[aria-selected="true"] {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--accent-text);
}
.view-tab:hover:not([aria-selected="true"]) {
  background: var(--bg-2);
  color: var(--fg);
}

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.sb-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 10px;
  border-radius: 4px;
  color: var(--fg-2);
  cursor: pointer;
  border: 0;
  background: transparent;
  font-size: 13px;
  width: 100%;
  text-align: left;
}
.sb-item:hover { background: var(--bg-2); color: var(--fg); }
.sb-item[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-text);
}
.sb-item-name { display: inline-flex; align-items: center; gap: 6px; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.sb-item-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fg-4);
  flex-shrink: 0;
}
.sb-item[aria-pressed="true"] .sb-item-dot { background: var(--accent); }
.sb-item-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-4);
  font-variant-numeric: tabular-nums;
}

.sidebar-meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}
.sidebar-meta li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
}
.sidebar-meta li > span:first-child {
  color: var(--fg-3);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.sidebar-meta code {
  font-size: 11px;
  color: var(--fg-1);
}

/* -------- main column -------- */
.main { min-width: 0; }
.main-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
}
.main-head-titles { flex: 1; min-width: 0; }
.main-head-titles h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -.01em;
  margin: 0 0 4px;
  color: var(--fg);
}
.main-sub {
  font-size: 13.5px;
  color: var(--fg-2);
  margin: 0;
  max-width: 76ch;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 11px;
  border: 1px solid var(--border-2);
  border-radius: 5px;
  background: var(--bg);
  color: var(--fg-1);
  font-size: 12.5px;
  font-weight: 500;
}
.btn:hover { background: var(--bg-1); border-color: var(--fg-3); color: var(--fg); }
.btn-ghost { background: transparent; border-color: var(--border); }
.btn-link {
  background: transparent;
  border: 0;
  color: var(--accent-text);
  padding: 0;
  font-size: 11.5px;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-family: var(--font-mono);
}

/* weights bar */
.weights-bar {
  margin-top: 16px;
  margin-bottom: 16px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}
.weights-bar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.weights-bar-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--fg-3);
}
.weights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px 16px;
}
.weight-cell { display: grid; gap: 4px; }
.weight-cell-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 12px;
}
.weight-cell-name { color: var(--fg-2); font-weight: 500; }
.weight-cell-name.dir-down::after { content: " ↓"; color: var(--fg-4); }
.weight-cell-name.dir-up::after   { content: " ↑"; color: var(--accent-text); }
.weight-cell-val {
  font-family: var(--font-mono);
  color: var(--fg-1);
  font-variant-numeric: tabular-nums;
}
.weight-cell input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg-3);
  border-radius: 2px;
  outline: 0;
}
.weight-cell input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent);
  cursor: pointer;
}
.weight-cell input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  cursor: pointer;
}

/* -------------------------------------------------------------------------
   Rank table (academic table styling, tabular-nums)
   ------------------------------------------------------------------------- */
.table-wrap {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  overflow-x: auto;
  min-height: 240px;
}
.rank-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
.rank-table thead th {
  position: sticky;
  top: 0;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--fg-3);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
.rank-table thead th:hover { color: var(--fg); }
.rank-table thead th.sorted {
  color: var(--accent-text);
  background: color-mix(in srgb, var(--accent-soft) 60%, var(--bg-1));
}
.rank-table thead th.sorted::after {
  content: " ↓";
  margin-left: 3px;
}
.rank-table thead th.sorted.asc::after { content: " ↑"; }
.rank-table tbody tr {
  border-bottom: 1px solid var(--hairline);
  cursor: pointer;
}
.rank-table tbody tr:last-child { border-bottom: 0; }
.rank-table tbody tr:hover {
  background: var(--bg-1);
}
.rank-table tbody tr.row-active {
  background: var(--accent-soft);
}
.rank-table td {
  padding: 9px 12px;
  vertical-align: middle;
  white-space: nowrap;
}
.rank-table td.col-num,
.rank-table th.col-num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
}

.col-rank {
  width: 44px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--fg-3);
  font-size: 12px;
}
.col-rank-1 { color: var(--accent); font-weight: 600; }
.col-rank-2, .col-rank-3 { color: var(--accent-text); font-weight: 600; }

.cell-name {
  display: inline-flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}
.cell-name-main {
  color: var(--fg);
  font-weight: 500;
  letter-spacing: -.005em;
}
.cell-name-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
}

/* In-cell pass bar */
.cell-pass {
  position: relative;
  width: 80px;
  height: 4px;
  background: var(--bg-2);
  border-radius: 2px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
}
.cell-pass-fill {
  position: absolute;
  inset: 0;
  width: 0;
  background: var(--accent);
  border-radius: 2px;
}
.cell-pass-text {
  display: inline-block;
  width: 44px;
  text-align: right;
}

.cell-score {
  font-weight: 600;
  color: var(--fg);
}

.cell-tag {
  display: inline-block;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  background: var(--bg-2);
  color: var(--fg-2);
  border-radius: 3px;
}
.cell-tag-cwe { background: color-mix(in srgb, var(--accent-soft) 70%, var(--bg-2)); color: var(--accent-text); }
.cell-tag-diff-1 { background: color-mix(in srgb, var(--good) 18%, var(--bg-2)); color: var(--good); }
.cell-tag-diff-2 { background: color-mix(in srgb, var(--good) 14%, var(--bg-2)); color: var(--good); }
.cell-tag-diff-3 { background: color-mix(in srgb, var(--warn) 22%, var(--bg-2)); color: var(--warn); }
.cell-tag-diff-4 { background: color-mix(in srgb, var(--danger) 18%, var(--bg-2)); color: var(--danger); }
.cell-tag-diff-5 { background: color-mix(in srgb, var(--danger) 28%, var(--bg-2)); color: var(--danger); font-weight: 600; }

/* -------------------------------------------------------------------------
   Heatmap section
   ------------------------------------------------------------------------- */
.heatmap-section {
  padding: 24px 24px 48px;
  border-top: 1px solid var(--hairline);
  background: var(--bg-1);
}
.section-head {
  max-width: 1320px;
  margin: 0 auto 18px;
  padding: 16px 0;
}
.section-head h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -.01em;
  margin: 0 0 4px;
  color: var(--fg);
}
.section-head p {
  font-size: 13px;
  color: var(--fg-2);
  margin: 0;
  max-width: 76ch;
}

.heatmap-toolbar {
  max-width: 1320px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  color: var(--fg-3);
}
.heatmap-toolbar-spacer { flex: 1; }
.heatmap-meta { font-family: var(--font-mono); font-size: 11px; color: var(--fg-3); }
.heatmap-legend-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.heatmap-legend {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.heatmap-legend-bar {
  width: 160px;
  height: 8px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--hm-0) 0%, var(--hm-30) 30%, var(--hm-60) 60%, var(--hm-100) 100%);
  border: 1px solid var(--border);
}

.heatmap-wrap {
  max-width: 1320px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: auto;
  background: var(--bg);
  position: relative;
  min-height: 240px;
}

.heatmap-grid {
  display: grid;
  font-size: 11px;
  font-family: var(--font-mono);
  position: relative;
  min-width: max-content;
}
.heatmap-grid .hm-corner {
  position: sticky;
  left: 0;
  top: 0;
  z-index: 3;
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--fg-3);
}
.heatmap-grid .hm-col-head {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  padding: 8px 4px 6px 4px;
  font-size: 10.5px;
  color: var(--fg-2);
  white-space: nowrap;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  height: 140px;
  text-align: end;
  overflow: hidden;
  text-overflow: ellipsis;
}
.heatmap-grid .hm-row-head {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--bg);
  border-right: 1px solid var(--border);
  padding: 4px 10px 4px 12px;
  font-size: 11.5px;
  color: var(--fg-1);
  white-space: nowrap;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.hm-row-head-prov {
  font-size: 10px;
  color: var(--fg-3);
}
.heatmap-grid .hm-cell {
  padding: 0;
  text-align: center;
  font-variant-numeric: tabular-nums;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  position: relative;
  min-width: 38px;
  height: 26px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg);
}
.heatmap-grid .hm-cell:hover { outline: 2px solid var(--accent); outline-offset: -2px; z-index: 4; }
.heatmap-grid .hm-cell.dim    { color: var(--fg-3); }
.heatmap-grid .hm-cell.bright { color: #1c1209; font-weight: 500; }
[data-theme="dark"] .heatmap-grid .hm-cell.bright { color: #1c1209; }

/* -------------------------------------------------------------------------
   Standards (metric definition cards)
   ------------------------------------------------------------------------- */
.standards { padding: 24px 24px 56px; border-top: 1px solid var(--hairline); }
.standards-grid {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.std-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.std-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.std-card-name {
  font-weight: 600;
  letter-spacing: -.005em;
  font-size: 14px;
}
.std-card-dir {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.std-card-dir.up   { color: var(--good); }
.std-card-dir.down { color: var(--warn); }
.std-card p {
  margin: 0;
  font-size: 12.5px;
  color: var(--fg-2);
  line-height: 1.55;
}
.std-card code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0 4px;
  border-radius: 3px;
  font-size: 11.5px;
}

/* -------------------------------------------------------------------------
   Drawer (right slide-in)
   ------------------------------------------------------------------------- */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, #000 38%, transparent);
  z-index: 70;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}
.drawer-backdrop.open { opacity: 1; pointer-events: auto; }

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: min(560px, 92vw);
  background: var(--bg);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow-pop);
  z-index: 71;
  transform: translateX(100%);
  transition: transform 220ms cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}
.drawer[hidden] { display: flex !important; visibility: hidden; }
.drawer.open { transform: translateX(0); visibility: visible; }
.drawer-head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}
.drawer-eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--fg-3);
  margin-bottom: 4px;
}
.drawer-title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -.01em;
}
.drawer-sub {
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--fg-3);
  font-family: var(--font-mono);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.dr-section { margin-bottom: 20px; }
.dr-section h4 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--fg-3);
  font-weight: 600;
}
.dr-metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.dr-metric {
  background: var(--bg);
  padding: 10px 12px;
}
.dr-metric-name {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--fg-3);
  font-family: var(--font-mono);
}
.dr-metric-val {
  font-family: var(--font-mono);
  font-size: 18px;
  font-variant-numeric: tabular-nums;
  color: var(--fg);
  font-weight: 600;
  letter-spacing: -.01em;
}
.dr-metric-foot {
  font-size: 11px;
  color: var(--fg-3);
  font-family: var(--font-mono);
}

.dr-kv {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 4px 12px;
  font-size: 12.5px;
}
.dr-kv dt {
  color: var(--fg-3);
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
  align-self: center;
}
.dr-kv dd {
  margin: 0;
  color: var(--fg-1);
  font-family: var(--font-mono);
  font-size: 12px;
  word-break: break-all;
}
.dr-kv dd a { color: var(--accent-text); }

.dr-cmd {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-1);
  white-space: pre-wrap;
  word-break: break-all;
}

/* -------------------------------------------------------------------------
   Loading / empty / error states
   ------------------------------------------------------------------------- */
.state {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--fg-3);
  font-size: 13px;
}
.state-title { color: var(--fg-1); font-weight: 600; font-size: 14px; }
.state-sub   { color: var(--fg-3); font-size: 12.5px; }
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border-2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-1);
  padding: 24px 24px 36px;
  margin-top: 32px;
}
.foot-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
}
.foot-brand { display: inline-flex; align-items: center; gap: 0; flex-wrap: wrap; }
.foot-links { display: inline-flex; gap: 14px; flex-wrap: wrap; }
.foot-links a { color: var(--fg-2); }
.foot-links a:hover { color: var(--accent-text); }

/* -------------------------------------------------------------------------
   Toast
   ------------------------------------------------------------------------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(8px);
  background: var(--fg);
  color: var(--bg);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 500;
  box-shadow: var(--shadow-pop);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 80;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* -------------------------------------------------------------------------
   Methodology page styling (long-form prose)
   ------------------------------------------------------------------------- */
.prose {
  max-width: 760px;
  margin: 32px auto 64px;
  padding: 0 24px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-1);
}
.prose h1 {
  font-size: 30px;
  letter-spacing: -.02em;
  font-weight: 600;
  margin: 0 0 8px;
}
.prose .prose-sub {
  font-size: 14px;
  color: var(--fg-3);
  font-family: var(--font-mono);
  margin-bottom: 28px;
}
.prose h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -.01em;
  margin: 36px 0 12px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}
.prose h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 24px 0 8px;
}
.prose p { margin: 12px 0; }
.prose code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0 5px;
  border-radius: 3px;
  font-size: 13px;
}
.prose pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.55;
}
.prose pre code { background: transparent; border: 0; padding: 0; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin: 4px 0; }
.prose a { color: var(--accent-text); border-bottom: 1px dotted; }
.prose a:hover { border-bottom-style: solid; }
.prose blockquote {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  margin: 16px 0;
  padding: 10px 16px;
  border-radius: 0 6px 6px 0;
  color: var(--accent-text);
}
.prose .formula {
  margin: 12px 0;
  padding: 12px 16px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* responsive */
@media (max-width: 720px) {
  .nav-inner { gap: 12px; padding: 0 16px; }
  .nav-links { display: none; }
  .hero { padding: 18px 16px 14px; }
  .hero-title { font-size: 22px; }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 100%; }
  .leaderboard { padding: 16px 12px 32px; }
  .heatmap-section { padding: 16px 12px 32px; }
  .standards { padding: 16px 12px 32px; }
  .lock-card { padding: 28px 22px; }
  .lock-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* =============================================================================
   == Sister system tokens (kept identical between hack-skills & hackbenchmark) ==
   关键词: sister-link, nav-sep, provenance-bar, font-feature, brand-version
   不要在两站之间改这一段, 改的话两站同步改.
   ============================================================================= */

/* sister-link 样式 (skills <-> benchmark 跳转链, 学术风纯文字 + 箭头) */
.sister-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: 5px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-2);
  border: 1px solid var(--border);
  background: var(--bg-1);
  transition: all var(--t);
}
.sister-link:hover {
  color: var(--accent-text);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  background: var(--accent-soft);
}
.sister-link .sister-arrow {
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: .65;
  transition: transform var(--t), opacity var(--t);
}
.sister-link:hover .sister-arrow {
  transform: translateX(2px);
  opacity: 1;
}
.nav-sep {
  display: inline-block;
  width: 1px;
  height: 16px;
  background: var(--border);
  margin: 0 4px;
}
.foot-sister-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .12em;
  margin-right: 2px;
}
.foot-sep {
  color: var(--fg-4);
  margin: 0 4px;
}

/* =============================================================================
   LOCK SCREEN  - 全屏施工蒙层
   关键词: lock screen, hard lock, ok passcode, construction overlay
   ============================================================================= */
html.locked, html.locked body { overflow: hidden; height: 100vh; }
.lock-screen {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  isolation: isolate;
  background: var(--bg);
  transition: opacity 360ms cubic-bezier(0.4, 0, 0.2, 1);
}
.lock-screen.dissolve {
  opacity: 0;
  pointer-events: none;
}
.lock-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, color-mix(in srgb, var(--accent) 8%, transparent) 0%, transparent 60%),
    radial-gradient(ellipse 80% 60% at 50% 100%, color-mix(in srgb, var(--accent) 5%, transparent) 0%, transparent 70%);
}
[data-theme="dark"] .lock-bg {
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, color-mix(in srgb, var(--accent) 18%, transparent) 0%, transparent 60%),
    radial-gradient(ellipse 80% 60% at 50% 100%, color-mix(in srgb, var(--accent) 10%, transparent) 0%, transparent 70%);
}
.lock-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--hairline) 1px, transparent 1px),
                    linear-gradient(90deg, var(--hairline) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .4;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 0%, transparent 80%);
}

.lock-card {
  position: relative;
  z-index: 1;
  max-width: 640px;
  width: 100%;
  text-align: center;
  padding: 36px 32px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-pop);
}
.lock-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 11.5px;
  color: var(--fg-3);
}
.lock-eyebrow-tag {
  padding: 1px 7px;
  background: var(--accent);
  color: var(--accent-fg);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
  border-radius: 3px;
}
.lock-eyebrow-code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--fg-1);
  font-size: 11px;
}
.lock-eyebrow-sep { opacity: .5; }
.lock-title {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 600;
  letter-spacing: -.022em;
  color: var(--fg);
}
.lock-sub {
  margin: 0 auto 24px;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.65;
  color: var(--fg-2);
}
.lock-sub em { font-style: normal; color: var(--accent-text); font-weight: 600; }
.lock-num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; color: var(--fg); font-weight: 600; }

.lock-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 22px;
}
.lock-stat {
  background: var(--bg);
  padding: 12px 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.lock-stat-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}
.lock-stat-label {
  font-size: 10.5px;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.lock-eta {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-text);
  padding: 4px 10px;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  background: var(--accent-soft);
  border-radius: 999px;
  margin-bottom: 12px;
}
/* lock-session: 提示 preview session 30 分钟会过期 */
/* 关键词: lock session ttl, 30 minutes, expire notice */
.lock-session {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: .03em;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.lock-session-num {
  color: var(--accent-text);
  font-weight: 600;
}
.lock-foot {
  font-size: 11px;
  color: var(--fg-4);
  font-family: var(--font-mono);
  letter-spacing: .04em;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.lock-hint {
  font-size: 10.5px;
  color: var(--fg-3);
}
.lock-hint em {
  font-style: italic;
  color: var(--fg-2);
  border-bottom: 1px dashed var(--fg-4);
  padding-bottom: 1px;
}
.lock-status {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-text);
  height: 16px;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.lock-status.show { animation: lock-pulse 480ms cubic-bezier(0.4, 0, 0.2, 1); }
@keyframes lock-pulse {
  0%   { opacity: 0; transform: translateY(4px); }
  60%  { opacity: 1; transform: translateY(0); }
  100% { opacity: 1; transform: translateY(0); }
}