/* ==========================================================================
   TrafficRuleBench — project page styles
   ========================================================================== */

:root {
  --bg: #0a0e1a;
  --bg-alt: #0e1424;
  --surface: #131a2e;
  --surface-2: #1a2340;
  --border: rgba(148, 163, 214, 0.14);
  --text: #e8ecf8;
  --text-dim: #9aa5c4;
  --text-faint: #66719250;

  --accent: #fbbf24;         /* road-marking amber */
  --accent-2: #38bdf8;       /* sign blue */
  --green: #34d399;
  --red: #f87171;

  --c-priority: #fbbf24;
  --c-prohibitory: #f87171;
  --c-mandatory: #60a5fa;
  --c-special: #2dd4bf;

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --radius: 16px;
  --maxw: 1080px;
  --maxw-wide: 1240px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: rgba(251, 191, 36, 0.3); }

/* ============================ NAV ============================ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.nav.is-scrolled { border-bottom-color: var(--border); }

.nav-inner {
  max-width: var(--maxw-wide);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.01em;
}
.nav-logo:hover { text-decoration: none; }
.nav-logo-text { white-space: nowrap; color: var(--text); }

/* speed-limit (50) sign */
.nav-logo-mark {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 3px solid var(--red);
  background: #fff;
  position: relative;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-logo-mark::after {
  content: "50";
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 700;
  line-height: 1;
  color: #111;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
}
.nav-links a {
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ============================ HERO ============================ */

.hero {
  position: relative;
  padding: 110px 24px 48px;
  text-align: left;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 55% at 15% -10%, rgba(56, 189, 248, 0.1), transparent),
    var(--bg);
}

/* animated road lanes */
.hero-road {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
}
.lane-line {
  position: absolute;
  top: 0; bottom: 0;
  left: 4%;
  width: 3px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(251, 191, 36, 0.28) 0 40px,
    transparent 40px 90px
  );
  animation: lane-scroll 3.2s linear infinite;
}
.lane-line--2 { left: 50%; opacity: 0.5; animation-duration: 2.4s; }
.lane-line--3 { left: auto; right: 4%; animation-duration: 4s; }

@keyframes lane-scroll {
  from { background-position-y: 0; }
  to   { background-position-y: 130px; }
}

.hero-glow {
  position: absolute;
  left: 10%; top: 20%;
  width: 520px; height: 320px;
  transform: translateY(-30%);
  background: radial-gradient(ellipse, rgba(251, 191, 36, 0.05), transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  border: 1px solid rgba(56, 189, 248, 0.35);
  background: rgba(56, 189, 248, 0.08);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 18px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 2.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text);
}

.hero-blurb {
  margin-top: 12px;
  max-width: 560px;
  color: var(--text-dim);
  font-size: 0.98rem;
  line-height: 1.5;
}

/* ============================ REVIEWER NAV (hero) ============================ */

.hero--compact { padding-bottom: 40px; }

.rev-nav { margin-top: 28px; text-align: left; }

.rev-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 920px;
}

.rev-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 16px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--rev-color, var(--accent));
  color: var(--text);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}
.rev-card:hover {
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}
.rev-card--k1vn { --rev-color: var(--accent); }
.rev-card--ybmx { --rev-color: var(--accent-2); }
.rev-card--pqwl { --rev-color: var(--c-special); }

.rev-card-id {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--rev-color);
  letter-spacing: 0.04em;
}
.rev-card-issue {
  color: var(--text-dim);
  font-weight: 500;
}
.rev-card-topic {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.3;
}
.rev-card-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.45;
  flex: 1;
  padding-right: 8px;
}
.rev-card-arrow {
  align-self: flex-end;
  font-size: 1rem;
  color: var(--rev-color);
  transition: transform 0.18s;
  margin-top: 4px;
}
.rev-card:hover .rev-card-arrow { transform: translateY(2px); }

/* ============================ REVIEWER CHAPTERS ============================ */

.chapter { padding: 96px 24px; }
.chapter > .section-inner + .section-inner { margin-top: 72px; }

.chapter-head { max-width: 860px; }

.rev-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 7px 16px;
  border-radius: 100px;
  margin-bottom: 18px;
  border: 1px solid;
}
.rev-chip--k1vn { color: var(--accent);    border-color: rgba(251, 191, 36, 0.4);  background: rgba(251, 191, 36, 0.08); }
.rev-chip--ybmx { color: var(--accent-2);  border-color: rgba(56, 189, 248, 0.4);  background: rgba(56, 189, 248, 0.08); }
.rev-chip--pqwl { color: var(--c-special); border-color: rgba(45, 212, 191, 0.4);  background: rgba(45, 212, 191, 0.08); }

.rev-quote {
  margin: 22px 0;
  padding: 18px 24px;
  border-left: 3px solid var(--border);
  border-radius: 0 12px 12px 0;
  background: rgba(148, 163, 214, 0.05);
  color: var(--text-dim);
  font-size: 0.97rem;
  font-style: italic;
}
.chapter--k1vn .rev-quote { border-left-color: var(--accent); }
.chapter--ybmx .rev-quote { border-left-color: var(--accent-2); }
.chapter--pqwl .rev-quote { border-left-color: var(--c-special); }

.sub-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 56px;
}
.chapter-head + .section-inner .sub-title:first-child,
.chapter .sub-title:first-child { margin-top: 0; }

.sub-lead {
  max-width: 780px;
  margin-top: 12px;
  margin-bottom: 28px;
  color: var(--text-dim);
  font-size: 0.98rem;
}
.sub-lead em { color: var(--text); font-style: normal; font-weight: 600; }

.sign-note {
  max-width: 860px;
  margin: 10px 0 10px;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.5;
}
.sign-note strong { color: var(--text); }
.sign-note--follow { margin-top: 18px; }

.pair-group {
  margin-top: 28px;
}
.pair-group:first-of-type {
  margin-top: 8px;
}
.pair-cat {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--pair-cat-color, var(--text-dim));
}
.pair-cat--priority    { --pair-cat-color: var(--c-priority); }
.pair-cat--prohibitory { --pair-cat-color: var(--c-prohibitory); }
.pair-cat--mandatory   { --pair-cat-color: var(--c-mandatory); }
.pair-cat--special     { --pair-cat-color: var(--c-special); }

/* ============================ FIGURE BLOCKS (YBmX) ============================ */

.fig-block { margin-top: 56px; }

.fig-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}
.fig-frame img { width: 100%; }
.fig-frame .zoomable { cursor: zoom-in; }
.fig-frame--glow {
  background: var(--surface);
  border-color: rgba(45, 212, 191, 0.18);
  padding: 28px 32px;
  box-shadow:
    0 18px 60px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(45, 212, 191, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.03);
}
.fig-frame--glow:hover {
  transform: translateY(-2px);
  border-color: rgba(45, 212, 191, 0.32);
  box-shadow:
    0 22px 70px rgba(0, 0, 0, 0.5),
    0 0 40px rgba(45, 212, 191, 0.08);
}

/* Compact Spearman heatmap */
.fig-frame--sm {
  max-width: 860px;
  margin-inline: auto;
}

/* Scroll-in animation for pQWL figures */
.fig-block--reveal {
  opacity: 0;
  transform: translateY(22px) scale(0.985);
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.fig-block--reveal.is-visible {
  opacity: 1;
  transform: none;
}

.chapter--k1vn .sub-title {
  background: linear-gradient(90deg, var(--accent), #f59e0b);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.chapter--ybmx .sub-title {
  background: linear-gradient(90deg, var(--accent-2), #818cf8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.chapter--pqwl .sub-title {
  background: linear-gradient(90deg, var(--c-special), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.sub-title + .sub-lead + .fig-block,
.sub-title + .fig-block { margin-top: 20px; }

.media-caption--left { text-align: left; max-width: none; }

/* ============================ BEFORE/AFTER COMPARISON SLIDER ============================ */

.cmp-slider {
  --pos: 50%;
  --cmp-ar: 2858 / 888; /* default: teaser */
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  aspect-ratio: var(--cmp-ar);
  user-select: none;
  touch-action: none;
}
.cmp-slider--fig2 { --cmp-ar: 2200 / 522; }

.cmp-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

/* old figure, clipped to the left of the handle */
.cmp-before {
  position: absolute;
  inset: 0;
  overflow: hidden;
  clip-path: inset(0 calc(100% - var(--pos)) 0 0);
  background: #fff;
}

.cmp-handle {
  position: absolute;
  top: 0; bottom: 0;
  left: var(--pos);
  width: 3px;
  transform: translateX(-50%);
  background: var(--accent);
  box-shadow: 0 0 12px rgba(251, 191, 36, 0.55);
  pointer-events: none;
}
.cmp-handle-grip {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #1a1204;
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

.cmp-label {
  position: absolute;
  top: 12px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  pointer-events: none;
  background: rgba(10, 14, 26, 0.75);
  backdrop-filter: blur(4px);
}
.cmp-label--before { left: 12px;  color: var(--red); }
.cmp-label--after  { right: 12px; color: var(--green); }

/* invisible range input on top drives the slider (keyboard/touch friendly) */
.cmp-range {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
  -webkit-appearance: none;
  appearance: none;
}

/* ============================ SECTIONS ============================ */

.section { padding: 96px 24px; }
.section--alt { background: var(--bg-alt); }

.section-inner { max-width: var(--maxw); margin: 0 auto; }
.section-inner--wide { max-width: var(--maxw-wide); }

.section-kicker {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4.2vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

.section-lead {
  max-width: 780px;
  margin-top: 18px;
  color: var(--text-dim);
  font-size: 1.05rem;
}
.section-lead em { color: var(--text); font-style: normal; font-weight: 600; }

/* ============================ MEDIA SLOTS (GIF or placeholder) ============================ */

.media-slot {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background:
    linear-gradient(rgba(19, 26, 46, 0.85), rgba(19, 26, 46, 0.85)),
    repeating-linear-gradient(45deg, #182038 0 14px, #131a2e 14px 28px);
  border: 1px solid var(--border);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
}
.media-slot--hero { aspect-ratio: 16 / 9; }

.media-slot > img.gif-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: zoom-in;
}

.media-slot .poster-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 14px;
  background: #fff;
  opacity: 0.92;
}

.media-placeholder {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
  padding: 16px;
}
.media-placeholder svg { opacity: 0.6; }

/* "coming soon" ribbon overlaid on poster */
.soon-badge {
  position: absolute;
  z-index: 3;
  bottom: 10px;
  right: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #1a1204;
  background: var(--accent);
  padding: 5px 12px;
  border-radius: 100px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

/* ============================ FEATURED DEMO ============================ */

.featured-demo { margin-top: 44px; }
.featured-demo .media-slot {
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
}
.media-caption {
  margin-top: 16px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================ PLANNER PAIRS (base vs expert, 3.1) ============================ */

.planner-pairs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}
.planner-pairs--follow {
  margin-top: 18px;
}

.planner-pair {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 20px 18px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.planner-pair:hover {
  border-color: rgba(251, 191, 36, 0.35);
  transform: translateY(-2px);
}

.planner-pair-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}
.planner-pair-sign {
  height: 40px;
  width: auto;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.4));
}
.planner-pair-title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.planner-pair-blurb {
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.4;
  margin-top: 3px;
}
.planner-pair-badge {
  margin-left: auto;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.3);
  border-radius: 999px;
  padding: 4px 10px;
}

.planner-pair-media {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.planner-pair .pair-cell .media-slot {
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  overflow: hidden;
}
.planner-pair .pair-label {
  font-size: 0.72rem;
  margin-bottom: 8px;
}

/* legacy pair styles kept for any leftover markup */
.pairs-grid {
  display: grid;
  gap: 40px;
  margin-top: 48px;
}
.pair-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.pair-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.pair-sign {
  height: 44px;
  width: auto;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.4));
}
.pair-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
}
.pair-rule {
  color: var(--text-dim);
  font-size: 0.88rem;
  margin-top: 2px;
}
.pair-media {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.pair-cell { position: relative; }
.pair-cell .media-slot { aspect-ratio: 16 / 10; }
.pair-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.pair-label::before {
  content: "";
  width: 9px; height: 9px;
  border-radius: 50%;
  background: currentColor;
}
.pair-label--bad  { color: var(--red); }
.pair-label--good { color: var(--green); }
.pair-cell--bad  .media-slot { border-color: rgba(248, 113, 113, 0.35); }
.pair-cell--good .media-slot { border-color: rgba(52, 211, 153, 0.35); }

@media (max-width: 900px) {
  .planner-pairs { grid-template-columns: 1fr; }
  .planner-pair-media { grid-template-columns: 1fr; }
}

/* ============================ TABS ============================ */

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 40px 0 32px;
}

.tab {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 9px 20px;
  cursor: pointer;
  transition: all 0.18s;
}
.tab:hover { color: var(--text); border-color: rgba(148, 163, 214, 0.4); }
.tab.is-active { color: #10131f; background: var(--text); border-color: transparent; }

.tab--priority.is-active    { background: var(--c-priority); }
.tab--prohibitory.is-active { background: var(--c-prohibitory); }
.tab--mandatory.is-active   { background: var(--c-mandatory); }
.tab--special.is-active     { background: var(--c-special); }

.tab-count { opacity: 0.6; font-weight: 500; margin-left: 2px; }

/* ============================ SCENARIO CARDS ============================ */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 22px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.45);
  border-color: rgba(148, 163, 214, 0.32);
}
.card.is-hidden { display: none; }

.card .media-slot {
  border: none;
  border-radius: 0;
  border-bottom: 1px solid var(--border);
}

.card-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.card-top {
  display: flex;
  align-items: center;
  gap: 12px;
}
.card-sign {
  height: 40px;
  width: auto;
  max-width: 64px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 5px rgba(0,0,0,0.4));
}
.card-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  line-height: 1.25;
}
.card-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.card-rule {
  color: var(--text-dim);
  font-size: 0.87rem;
  flex: 1;
}
.card-rule strong { color: var(--text); font-weight: 600; }

.card-cat {
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  margin-top: 4px;
}
.card-cat--priority    { color: var(--c-priority);    background: rgba(251, 191, 36, 0.12); }
.card-cat--prohibitory { color: var(--c-prohibitory); background: rgba(248, 113, 113, 0.12); }
.card-cat--mandatory   { color: var(--c-mandatory);   background: rgba(96, 165, 250, 0.12); }
.card-cat--special     { color: var(--c-special);     background: rgba(45, 212, 191, 0.12); }

/* ============================ PIPELINE ============================ */

.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  margin-top: 48px;
}

.pipe-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
}
.pipe-step {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 14px;
}
.pipe-card h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.pipe-card p { color: var(--text-dim); font-size: 0.92rem; }
.pipe-card strong { color: var(--text); }

.checker-banner {
  margin-top: 26px;
  display: flex;
  gap: 22px;
  align-items: flex-start;
  background: linear-gradient(120deg, rgba(52, 211, 153, 0.08), rgba(56, 189, 248, 0.06));
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: var(--radius);
  padding: 28px;
}
.checker-icon {
  color: var(--green);
  flex-shrink: 0;
  margin-top: 2px;
}
.checker-banner h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.checker-banner p { color: var(--text-dim); font-size: 0.94rem; }

/* ============================ FINDINGS ============================ */

.findings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
  margin-top: 40px;
}

.finding {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.finding-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--red);
  margin-bottom: 10px;
}
.finding-num--green { color: var(--green); }
.finding p { color: var(--text-dim); font-size: 0.9rem; }

/* ============================ COMPARISON TABLE ============================ */

.table-wrap {
  margin-top: 44px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 720px;
}
.cmp-table th, .cmp-table td {
  padding: 13px 18px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.cmp-table th {
  background: var(--surface-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.84rem;
  white-space: nowrap;
}
.cmp-table td:first-child, .cmp-table th:first-child { text-align: left; }
.cmp-table tbody tr { background: var(--surface); }
.cmp-table tbody tr:last-child td { border-bottom: none; }
.cmp-table .yes { color: var(--green); font-weight: 700; }
.cmp-table .no  { color: rgba(248, 113, 113, 0.6); }
.cmp-table tr.ours {
  background: linear-gradient(90deg, rgba(251, 191, 36, 0.1), rgba(251, 191, 36, 0.03));
}
.cmp-table tr.ours td { border-top: 1px solid rgba(251, 191, 36, 0.3); }

.table-note {
  margin-top: 18px;
  color: var(--text-dim);
  font-size: 0.88rem;
  max-width: 820px;
}

/* ============================ CITATION ============================ */

.bibtex-wrap {
  position: relative;
  margin-top: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.bibtex-wrap pre {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.7;
  color: #c6d0f0;
  padding: 28px;
  overflow-x: auto;
}
.bibtex-copy {
  position: absolute;
  top: 14px; right: 14px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.15s;
}
.bibtex-copy:hover { color: var(--text); border-color: rgba(148, 163, 214, 0.4); }
.bibtex-copy.copied { color: var(--green); border-color: rgba(52, 211, 153, 0.4); }

/* ============================ FOOTER ============================ */

.footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
}
.footer-inner { max-width: var(--maxw); margin: 0 auto; }
.footer p { color: rgba(154, 165, 196, 0.55); font-size: 0.84rem; }

/* ============================ LIGHTBOX ============================ */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(5, 8, 16, 0.92);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.lightbox[hidden] { display: none; }
.lightbox-content img {
  max-width: min(1100px, 92vw);
  max-height: 86vh;
  border-radius: 12px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.7);
}
.lightbox-close {
  position: absolute;
  top: 22px; right: 30px;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--text-dim);
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.15s;
}
.lightbox-close:hover { color: #fff; }

/* ============================ REVEAL ANIMATION ============================ */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ============================ RESPONSIVE ============================ */

@media (max-width: 860px) {
  .nav-links { display: none; }
  .rev-cards { grid-template-columns: 1fr; }
  .pair-media { grid-template-columns: 1fr; }
  .planner-pairs { grid-template-columns: 1fr; }
  .planner-pair-media { grid-template-columns: 1fr; }
  .checker-banner { flex-direction: column; gap: 14px; }
  .section, .chapter { padding: 64px 18px; }
  .hero { padding: 96px 18px 36px; }
}