/* ============================================================
   Chinese Policy Sentiment Analysis Dashboard
   Design System — Nishant Dilip Sharma
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Palette */
  --bg: #f5f6f8;
  --bg-warm: #faf8f5;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-inset: #f0f1f4;
  --ink: #1a1d23;
  --ink-2: #4a5060;
  --ink-3: #8891a0;
  --border: #e2e5ea;
  --border-subtle: #eff0f3;
  --border-focus: #6b8afd;

  /* Category colors */
  --rc: #e5484d;
  --rc-light: #fce8e8;
  --rc-mid: #f9bfc0;
  --is: #4f8cff;
  --is-light: #e8f0ff;
  --is-mid: #b3ceff;
  --vc: #2fb36d;
  --vc-light: #e6f7ee;
  --vc-mid: #a3e0c0;
  --im: #f28c28;
  --im-light: #fef2e4;
  --im-mid: #f9c78e;

  /* Typography */
  --font-body: "DM Sans", "Inter", system-ui, sans-serif;
  --font-display: "DM Serif Display", Georgia, serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

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

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);

  /* Layout */
  --header-h: 64px;
  --rail-w: 64px;
  --rail-w-expanded: 200px;
  --transition: 160ms ease;
  --transition-slow: 280ms ease;

  /* Focus */
  --focus-ring: 0 0 0 2px var(--surface), 0 0 0 4px var(--border-focus);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  overflow-x: hidden;
}

body:not(.is-authenticated) {
  overflow: hidden;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; }

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 1px 5px;
  background: var(--surface-inset);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-4);
  z-index: 200;
  padding: var(--sp-2) var(--sp-4);
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  border-radius: var(--r-sm);
  transition: top var(--transition);
}
.skip-link:focus { top: var(--sp-2); }

body:not(.is-authenticated) .skip-link {
  display: none;
}

/* --- Focus --- */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ============================================================
   HEADER BAR
   ============================================================ */
.header-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  padding: 0 var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  z-index: 50;
}

body:not(.is-authenticated) .header-bar,
body:not(.is-authenticated) .layout {
  display: none;
}

/* ============================================================
   AUTH GATE
   ============================================================ */
.auth-shell {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--sp-6);
  background:
    radial-gradient(circle at top left, rgba(79, 140, 255, 0.12), transparent 32%),
    radial-gradient(circle at bottom right, rgba(229, 72, 77, 0.12), transparent 28%),
    linear-gradient(180deg, #f7f8fb 0%, #eef1f7 100%);
  z-index: 90;
}

.auth-card {
  width: min(100%, 520px);
  padding: clamp(28px, 4vw, 40px);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: 0 20px 60px rgba(26, 29, 35, 0.12);
  backdrop-filter: blur(18px);
  animation: authRise 420ms ease both;
}

.auth-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rc);
  background: var(--rc-light);
  border: 1px solid var(--rc-mid);
}

.auth-card h1 {
  margin: var(--sp-4) 0 var(--sp-3);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.auth-copy {
  margin: 0 0 var(--sp-6);
  color: var(--ink-2);
  max-width: 44ch;
}

.auth-form {
  display: grid;
  gap: var(--sp-3);
}

.auth-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.auth-row {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

.auth-row input {
  flex: 1 1 240px;
  min-width: 0;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  box-shadow: var(--shadow-sm);
}

.auth-row input::placeholder {
  color: var(--ink-3);
}

.auth-row input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: var(--focus-ring), var(--shadow-md);
}

.auth-error {
  min-height: 1.4em;
  margin: 0;
  color: var(--rc);
  font-size: 0.84rem;
  font-weight: 600;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  min-width: 0;
}

.brand-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
}

.brand-text {
  min-width: 0;
}

.brand-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.brand-author {
  margin: 0;
  font-size: 0.75rem;
  color: var(--ink-3);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.brand-sep {
  margin: 0 var(--sp-2);
  opacity: 0.4;
}

.brand-corpus {
  font-family: var(--font-mono);
  font-size: 0.69rem;
}

/* Header Legend */
.header-legend {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

.legend-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px 4px 7px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: 1px solid var(--border);
  background: var(--surface);
  white-space: nowrap;
  transition: border-color var(--transition), box-shadow var(--transition);
  cursor: default;
}

.legend-badge:hover {
  border-color: var(--cat-border, var(--border));
  box-shadow: var(--shadow-md);
}

.legend-badge .legend-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: var(--cat-bg, var(--surface-inset));
  color: var(--cat-color, var(--ink-2));
}

.legend-badge .legend-icon svg {
  width: 12px;
  height: 12px;
}

.legend-badge .legend-full {
  color: var(--ink-2);
  font-weight: 500;
  font-size: 0.68rem;
}

/* Badge category variants */
.legend-badge--rc { --cat-color: var(--rc); --cat-bg: var(--rc-light); --cat-border: var(--rc-mid); }
.legend-badge--is { --cat-color: var(--is); --cat-bg: var(--is-light); --cat-border: var(--is-mid); }
.legend-badge--vc { --cat-color: var(--vc); --cat-bg: var(--vc-light); --cat-border: var(--vc-mid); }
.legend-badge--im { --cat-color: var(--im); --cat-bg: var(--im-light); --cat-border: var(--im-mid); }

/* ============================================================
   NAVIGATION RAIL
   ============================================================ */
.nav-rail {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--sp-5) 0;
  gap: var(--sp-1);
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 40;
  overflow-y: auto;
  transition: width var(--transition-slow);
}

.nav-rail:hover {
  width: var(--rail-w-expanded);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: calc(100% - var(--sp-4));
  padding: var(--sp-3) var(--sp-3);
  border: none;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--ink-2);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  transition: background var(--transition), color var(--transition);
}

.nav-item:hover {
  background: var(--surface-inset);
  color: var(--ink);
}

.nav-item.is-active {
  background: var(--is-light);
  color: var(--is);
}

.nav-item-icon {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
}

.nav-item-icon svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.8;
}

.nav-item-label {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.nav-rail:hover .nav-item-label {
  opacity: 1;
}

/* Separator */
.nav-sep {
  width: 32px;
  height: 1px;
  background: var(--border);
  margin: var(--sp-2) 0;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.app {
  min-height: 100dvh;
}

.layout {
  display: flex;
  padding-top: var(--header-h);
}

.main-scroll {
  flex: 1;
  min-width: 0;
  margin-left: var(--rail-w);
  padding: var(--sp-6);
  display: grid;
  gap: var(--sp-5);
  max-width: 1400px;
  transition: margin-left var(--transition-slow);
}

/* When rail is hovered, push content */
.nav-rail:hover ~ .main-scroll {
  margin-left: var(--rail-w-expanded);
}

/* ============================================================
   HERO METRICS
   ============================================================ */
.hero {
  animation: fadeUp 360ms ease both;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-4);
}

.metric-card {
  position: relative;
  padding: var(--sp-5) var(--sp-5) var(--sp-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.metric-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.metric-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  border-radius: 4px 0 0 4px;
}

.metric-card:nth-child(1)::before { background: var(--rc); }
.metric-card:nth-child(2)::before { background: var(--is); }
.metric-card:nth-child(3)::before { background: var(--vc); }
.metric-card:nth-child(4)::before { background: var(--im); }

.metric-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin-bottom: var(--sp-2);
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1;
  margin-bottom: var(--sp-2);
  letter-spacing: -0.02em;
}

.metric-sub {
  font-size: 0.78rem;
  color: var(--ink-3);
  line-height: 1.4;
}

/* ============================================================
   FILTER BAR
   ============================================================ */
.filter-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-4) var(--sp-5);
  box-shadow: var(--shadow-sm);
  animation: fadeUp 400ms ease both;
}

.filter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-3);
}

.filter-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

.filter-count {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 8px;
  background: var(--is-light);
  color: var(--is);
  border-radius: 999px;
  font-weight: 600;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: var(--sp-3);
  align-items: end;
}

.filter-field {
  display: grid;
  gap: var(--sp-1);
}

.filter-field label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

select,
input[type="search"] {
  width: 100%;
  padding: var(--sp-2) var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--ink);
  appearance: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

select:hover, input[type="search"]:hover {
  border-color: var(--ink-3);
}

select:focus, input[type="search"]:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(107, 138, 253, 0.15);
}

select {
  padding-right: 28px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%238891a0' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.filter-actions {
  display: flex;
  gap: var(--sp-2);
  align-items: end;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-2);
  cursor: pointer;
  transition: all var(--transition);
}

.btn:hover {
  border-color: var(--ink-3);
  background: var(--surface-inset);
}

.btn--primary {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.btn--primary:hover {
  background: #2c3040;
}

/* ============================================================
   SECTIONS & PANELS
   ============================================================ */
.section {
  animation: fadeUp 420ms ease both;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--sp-4);
  margin-bottom: var(--sp-5);
}

.panel-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin-bottom: var(--sp-1);
}

.panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.panel-desc {
  margin: var(--sp-2) 0 0;
  font-size: 0.84rem;
  color: var(--ink-2);
  max-width: 720px;
}

/* --- Category accent stripe on section panels --- */
.panel::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--rc), var(--is), var(--vc), var(--im));
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  opacity: 0.7;
}

.panel { position: relative; overflow: hidden; }

@keyframes authRise {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ============================================================
   CATEGORY BADGES (inline label markers)
   ============================================================ */
.cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px 2px 4px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  white-space: nowrap;
}

.cat-badge .cat-icon {
  width: 14px;
  height: 14px;
  display: grid;
  place-items: center;
  border-radius: 4px;
}

.cat-badge .cat-icon svg {
  width: 10px;
  height: 10px;
}

.cat-badge--rc { background: var(--rc-light); color: var(--rc); }
.cat-badge--is { background: var(--is-light); color: var(--is); }
.cat-badge--vc { background: var(--vc-light); color: var(--vc); }
.cat-badge--im { background: var(--im-light); color: var(--im); }

/* Category color classes */
.cat-rc { --cat-color: var(--rc); }
.cat-is { --cat-color: var(--is); }
.cat-vc { --cat-color: var(--vc); }
.cat-im { --cat-color: var(--im); }

/* ============================================================
   INSIGHT CARDS
   ============================================================ */
.insight-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.insight-card {
  padding: var(--sp-4);
  background: var(--surface-inset);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  transition: box-shadow var(--transition), transform var(--transition);
}

.insight-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.insight-eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin-bottom: var(--sp-1);
}

.insight-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: var(--sp-1);
}

.insight-text {
  font-size: 0.78rem;
  color: var(--ink-3);
  margin: 0;
}

/* ============================================================
   DETAIL CARDS & SUMMARY
   ============================================================ */
.detail-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.detail-card {
  padding: var(--sp-5);
  background: var(--surface-inset);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
}

.detail-card .label {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin-bottom: var(--sp-3);
}

.detail-card h3 {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
}

.detail-card p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--ink-2);
}

.summary-strip {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--sp-4);
  align-items: stretch;
}

.methods-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.method-note {
  padding: var(--sp-4);
  background: var(--bg-warm);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  font-size: 0.82rem;
  color: var(--ink-2);
}

.method-note strong {
  display: block;
  margin-bottom: var(--sp-2);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

/* ============================================================
   STACKED BAR
   ============================================================ */
.stacked-bar {
  display: flex;
  width: 100%;
  height: 14px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface-inset);
}

.stacked-bar.large { height: 22px; }

.segment {
  min-width: 0;
  width: var(--w, 0%);
  background: var(--cat-color);
  transition: filter var(--transition);
}

.segment:hover { filter: brightness(0.9); }

/* ============================================================
   COMPOSITION DONUT (SVG-based)
   ============================================================ */
.donut-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-6);
}

.donut-svg {
  width: 160px;
  height: 160px;
  transform: rotate(-90deg);
}

.donut-arc {
  fill: none;
  stroke-width: 18;
  stroke-linecap: butt;
  transition: stroke-dashoffset 600ms ease;
}

.donut-center-label {
  text-anchor: middle;
  dominant-baseline: central;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  fill: var(--ink);
  transform: rotate(90deg);
  transform-origin: center;
}

/* ============================================================
   LEGEND
   ============================================================ */
.legend {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.82rem;
  color: var(--ink-2);
}

.legend-item strong { color: var(--ink); font-weight: 700; }

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex: 0 0 auto;
  background: var(--cat-color);
}

/* ============================================================
   BARS (horizontal single-category)
   ============================================================ */
.bars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.bars-list { display: grid; gap: var(--sp-3); }

.bar-row {
  display: grid;
  grid-template-columns: minmax(160px, 220px) 1fr 64px;
  gap: var(--sp-3);
  align-items: center;
}

.bar-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
}

.bar-value {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
}

.single-bar {
  position: relative;
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-inset);
}

.single-bar span {
  display: block;
  height: 100%;
  width: var(--w, 0%);
  background: var(--cat-color);
  border-radius: 999px;
  min-width: 2px;
}

/* ============================================================
   TABLES
   ============================================================ */
.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: auto;
  max-height: 680px;
  background: var(--surface);
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

th, td {
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
  vertical-align: top;
}

th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--bg);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  border-bottom-color: var(--border);
}

tbody tr {
  transition: background var(--transition);
}

tbody tr:hover {
  background: var(--is-light);
}

tbody tr.is-selected {
  background: var(--im-light);
}

tbody tr.is-commentary {
  opacity: 0.55;
}

tbody tr.is-commentary:hover {
  opacity: 0.8;
}

.meta-line {
  color: var(--ink-3);
  font-size: 0.75rem;
  margin-top: 2px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}

.chip {
  padding: 3px 8px;
  font-size: 0.68rem;
  font-weight: 700;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-2);
  line-height: 1;
}

.chip.active {
  background: var(--is-light);
  border-color: var(--is-mid);
  color: var(--is);
}

.chip.commentary-chip {
  background: transparent;
  border: 1px dashed var(--border);
  color: var(--ink-3);
  font-weight: 500;
}

/* ============================================================
   HEATMAP
   ============================================================ */
.heatmap-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.heatmap-wrap {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: auto;
  background: var(--surface);
}

.heatmap {
  border-collapse: separate;
  border-spacing: 1px;
  min-width: 720px;
  width: 100%;
}

.heatmap th {
  background: var(--bg);
}

.heatmap td {
  padding: var(--sp-3);
  text-align: center;
  border-bottom: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
}

.heatmap .stub {
  min-width: 160px;
  text-align: left;
  font-family: var(--font-body);
  font-weight: 600;
  background: var(--surface);
  position: sticky;
  left: 0;
  z-index: 1;
}

.heatmap td.low-n::after {
  content: "low n";
  display: block;
  margin-top: 2px;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--ink-3);
}

.heatmap td.empty-cell {
  background: var(--surface-inset);
  color: var(--ink-3);
}

/* ============================================================
   CLAUSE / EVIDENCE
   ============================================================ */
.clause-text {
  max-width: 780px;
  font-size: 0.86rem;
  line-height: 1.6;
}

.category-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.category-tag {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 0.66rem;
  font-weight: 700;
  background: var(--cat-bg, var(--surface-inset));
  color: var(--cat-color, var(--ink-2));
  border: 1px solid var(--cat-border, var(--border));
}

.category-tag.cat-rc { --cat-bg: var(--rc-light); --cat-color: var(--rc); --cat-border: var(--rc-mid); }
.category-tag.cat-is { --cat-bg: var(--is-light); --cat-color: var(--is); --cat-border: var(--is-mid); }
.category-tag.cat-vc { --cat-bg: var(--vc-light); --cat-color: var(--vc); --cat-border: var(--vc-mid); }
.category-tag.cat-im { --cat-bg: var(--im-light); --cat-color: var(--im); --cat-border: var(--im-mid); }

/* ============================================================
   DOT STRIP (distribution visualization)
   ============================================================ */
.dot-strip {
  position: relative;
  height: 6px;
  background: var(--surface-inset);
  border-radius: 999px;
  margin-top: var(--sp-1);
  min-width: 80px;
}

.dot-strip .dot-marker {
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cat-color, var(--ink-2));
  border: 1.5px solid var(--surface);
  transform: translate(-50%, -50%);
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   LOADING
   ============================================================ */
.loading-state {
  display: grid;
  place-items: center;
  min-height: 40vh;
  text-align: center;
  gap: var(--sp-3);
}

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--is);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

.loading-text {
  font-size: 0.88rem;
  color: var(--ink-3);
}

.error-box {
  padding: var(--sp-4);
  background: var(--rc-light);
  border: 1px solid var(--rc-mid);
  border-radius: var(--r-md);
  color: var(--rc);
  font-weight: 600;
}

.footer-note {
  margin-top: var(--sp-4);
  color: var(--ink-3);
  font-size: 0.78rem;
}

/* ============================================================
   UTILITY
   ============================================================ */
.mt-sm { margin-top: var(--sp-3); }
.mt-md { margin-top: var(--sp-5); }
.mt-lg { margin-top: var(--sp-6); }

.filter-field--wide  { grid-column: span 2; }
.filter-field--mid   { grid-column: span 1; }
.filter-field--narrow { grid-column: span 1; }

tr[data-doc-id] { cursor: pointer; }

.label {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin-bottom: var(--sp-2);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1200px) {
  .hero-grid,
  .insight-grid,
  .bars-grid,
  .detail-grid,
  .methods-box,
  .summary-strip {
    grid-template-columns: 1fr 1fr;
  }

  .legend {
    grid-template-columns: 1fr 1fr;
  }

  .filter-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 860px) {
  .header-bar {
    height: auto;
    padding: var(--sp-3) var(--sp-4);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
  }

  .header-legend {
    flex-wrap: wrap;
  }

  .nav-rail {
    position: static;
    width: auto;
    flex-direction: row;
    padding: var(--sp-2) var(--sp-4);
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .nav-rail:hover { width: auto; }
  .nav-item-label { opacity: 1; }

  .layout {
    flex-direction: column;
    padding-top: 0;
  }

  .main-scroll {
    margin-left: 0;
    padding: var(--sp-4);
  }
  .nav-rail:hover ~ .main-scroll {
    margin-left: 0;
  }

  .hero-grid,
  .insight-grid,
  .bars-grid,
  .detail-grid,
  .methods-box,
  .summary-strip,
  .filter-grid,
  .legend {
    grid-template-columns: 1fr;
  }

  .bar-row { grid-template-columns: 1fr; }

  .donut-wrap {
    flex-direction: column;
  }
}

@media print {
  .header-bar { position: static; box-shadow: none; }
  .nav-rail { display: none; }
  .main-scroll { margin-left: 0; }
  .panel { break-inside: avoid; box-shadow: none; border: 1px solid #ddd; }
}