/* ============================================================
   Meta-Harness Paper HTML — styles.css
   Palette: midnight_aurora
   ============================================================ */

/* ---- CSS Variables ---- */
:root {
  --bg: #F0EFF5;
  --surface: #FFFFFF;
  --primary: #2E1065;
  --secondary: #4C1D95;
  --accent: #6D28D9;
  --text: #1A0B3E;
  --muted: #8B85A0;
  --line: #D5D0E5;
  --hero-bg: #1A0B3E;
  --hero-text: #E8E4F8;
  --highlight: #A78BFA;
  --badge-bg: #EDE9FE;
  --badge-text: #4C1D95;
  --row-alt: #F5F3FF;
  --delta-pos: #059669;
  --delta-neg: #DC2626;
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 960px;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(46, 16, 101, 0.12);
  --shadow-hover: 0 8px 30px rgba(46, 16, 101, 0.2);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ---- Container ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--hero-bg);
  overflow: hidden;
  padding: 80px 24px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,11,62,0.85) 0%, rgba(46,16,101,0.7) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  text-align: center;
  animation: fadeUp 0.5s ease-out 0.2s both;
}

.hero-badges {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.institution-badge {
  background: rgba(255,255,255,0.12);
  color: #C4B5FD;
  border: 1px solid rgba(196,181,253,0.3);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--font-body);
}

.arxiv-badge {
  background: var(--accent);
  color: white;
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 900;
  color: var(--hero-text);
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero-authors {
  color: #C4B5FD;
  font-size: 0.9375rem;
  margin-bottom: 24px;
}

.hero-achievements {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.achievement-tag {
  background: var(--badge-bg);
  color: var(--badge-text);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.875rem;
  font-weight: 600;
}

.hero-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border-radius: 8px;
  padding: 12px 28px;
  font-weight: 600;
  font-family: var(--font-body);
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-block;
}
.btn-primary:hover { transform: scale(1.03); box-shadow: 0 4px 16px rgba(109,40,217,0.5); }

.btn-secondary {
  background: transparent;
  color: var(--highlight);
  border: 1.5px solid var(--highlight);
  border-radius: 8px;
  padding: 12px 28px;
  font-weight: 600;
  font-family: var(--font-body);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
  display: inline-block;
}
.btn-secondary:hover { background: rgba(167,139,250,0.15); }

/* ---- Sections ---- */
.section {
  padding: 80px 0;
}
.section-alt {
  background: var(--bg);
}
.section:not(.section-alt) {
  background: var(--surface);
}

h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 28px;
  line-height: 1.25;
}

h3 {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 12px;
  line-height: 1.3;
}

p {
  margin-bottom: 16px;
  color: var(--text);
}

p:last-child { margin-bottom: 0; }

strong { color: var(--secondary); font-weight: 600; }
em { color: var(--secondary); }
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--badge-bg);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ---- Abstract Block ---- */
.abstract-block {
  border-left: 4px solid var(--accent);
  background: #F5F3FF;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px 32px;
  margin-bottom: 32px;
}

/* ---- Metrics Grid ---- */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.metric-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-top: 4px solid var(--accent);
  padding: 24px 20px;
  text-align: center;
  transition: box-shadow 0.2s;
}
.metric-card:hover { box-shadow: var(--shadow-hover); }

.metric-domain {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 8px;
}

.metric-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
  font-family: var(--font-heading);
}

.metric-desc {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.4;
}

/* ---- Card Grids ---- */
.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}
.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.content-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
  padding: 24px 20px;
  transition: box-shadow 0.2s;
}
.content-card:hover { box-shadow: var(--shadow-hover); }

.card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

/* ---- Objective Box ---- */
.objective-box {
  background: var(--badge-bg);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 40px;
}

.objective-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ---- Algorithm Box ---- */
.algo-box {
  background: var(--hero-bg);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin: 32px 0;
  overflow-x: auto;
}

.algo-header {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--highlight);
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(167,139,250,0.3);
  padding-bottom: 12px;
}

.algo-code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  color: #E8E4F8;
  white-space: pre;
  overflow-x: auto;
}

.algo-kw { color: #C4B5FD; font-weight: 600; }
.algo-comment { color: #8B85A0; }

.algo-note {
  font-size: 0.875rem;
  color: #8B85A0;
  font-style: italic;
  margin-top: 14px;
  margin-bottom: 0;
}

/* ---- Two-Column Layout ---- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  margin: 32px 0;
}

.text-block p { margin-bottom: 14px; }
.text-block h3 { margin-bottom: 10px; }

/* ---- Figures ---- */
.figure-block {
  margin: 0;
}

.figure-block img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  display: block;
}

.figure-block figcaption {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 10px;
  font-style: italic;
}

.figure-center {
  max-width: 700px;
  margin: 32px auto;
}
.figure-center img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
}
.figure-center figcaption {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 10px;
  font-style: italic;
  text-align: center;
}

/* ---- Tables ---- */
.table-wrapper {
  margin: 32px 0;
}

.table-wrapper h3 {
  margin-bottom: 12px;
}

.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--surface);
}

.data-table th {
  background: var(--primary);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

.data-table tbody tr:nth-child(even) {
  background: var(--row-alt);
}

.data-table tbody tr:hover {
  background: #EDE9FE;
}

.data-table caption {
  font-size: 0.875rem;
  color: var(--muted);
  font-style: italic;
  text-align: left;
  padding: 10px 0;
  caption-side: bottom;
}

.highlight-row {
  background: var(--badge-bg) !important;
  border-left: 4px solid var(--accent);
}

.gold-row {
  background: #FEF9C3 !important;
  border-left: 4px solid #D97706;
}

.section-header-row td {
  background: var(--secondary) !important;
  color: white;
  font-weight: 700;
  font-size: 0.875rem;
  text-align: center;
  padding: 8px 16px;
}

.compact-table { font-size: 0.875rem; }

/* Leaderboard table */
.leaderboard-table .highlight-row td { font-size: 1rem; }

/* Delta values */
.delta-pos { color: var(--delta-pos); font-size: 0.8em; font-weight: 600; }
.delta-neg { color: var(--delta-neg); font-size: 0.8em; font-weight: 600; }

/* ---- Dataset Badges ---- */
.dataset-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.dataset-badge {
  background: var(--badge-bg);
  color: var(--badge-text);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.8125rem;
  font-weight: 500;
}

/* ---- Result Callout ---- */
.result-callout {
  background: var(--primary);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 32px;
  color: white;
}

.result-callout h3 {
  color: var(--highlight);
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.callout-metrics {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.callout-metric {
  display: flex;
  flex-direction: column;
}

.callout-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--highlight);
  font-family: var(--font-heading);
  line-height: 1;
  margin-bottom: 4px;
}

.callout-label {
  font-size: 0.8125rem;
  color: #C4B5FD;
}

/* ---- AUTO Badge ---- */
.auto-badge {
  background: #059669;
  color: white;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-left: 8px;
  vertical-align: middle;
}

.rank-badge {
  background: #D97706;
  color: white;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.7rem;
  font-weight: 700;
  margin-left: 4px;
  vertical-align: middle;
}

/* ---- Key Findings ---- */
.key-findings {
  background: var(--primary) !important;
}

.key-findings h2 {
  color: var(--highlight) !important;
}

.findings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.finding-card {
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 28px 24px;
  border-top: 4px solid var(--highlight);
  color: white;
}

.finding-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.finding-card h3 {
  color: var(--highlight);
  margin-bottom: 12px;
}

.finding-card p {
  color: #C4B5FD;
  font-size: 0.9375rem;
}

/* ---- Pull Quote ---- */
.pull-quote {
  border-left: 4px solid var(--accent);
  background: var(--badge-bg);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  font-style: italic;
  font-size: 0.9375rem;
  color: var(--secondary);
  margin: 16px 0 0;
  quotes: none;
}

/* ---- Conclusion ---- */
.conclusion h2 { text-align: center; }

.conclusion-quote {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-style: italic;
  color: var(--muted);
  text-align: center;
  margin-top: 24px;
  line-height: 1.6;
}

/* ---- Muted Text ---- */
.muted-text {
  color: var(--muted);
  font-size: 0.9375rem;
  font-style: italic;
}

/* ---- References ---- */
.references-details {
  margin-top: 16px;
}

.references-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
  padding: 12px 0;
  font-size: 1rem;
  user-select: none;
}

.references-details summary:hover { color: var(--secondary); }

.references-list {
  padding-left: 0;
  list-style: none;
  margin-top: 16px;
}

.references-list li {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-body);
}

.references-list li:last-child { border-bottom: none; }

/* ---- Footer ---- */
.site-footer {
  background: var(--hero-bg);
  color: #8B85A0;
  padding: 24px 0;
  text-align: center;
  font-size: 0.875rem;
  border-top: 1px solid rgba(167,139,250,0.2);
}

/* ---- AI Explanation Elements ---- */
.flecto-note,
.flecto-callout,
.flecto-card,
.flecto-panel {
  border-radius: var(--radius);
  margin: 20px 0;
  position: relative;
}

.flecto-note::before,
.flecto-callout::before,
.flecto-card::before,
.flecto-panel::before {
  content: "🤖 AI explanation";
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #60a5fa;
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 0.5em;
}

.flecto-note {
  background: #EFF6FF;
  border-left: 3px solid #3B82F6;
  padding: 12px 16px;
  font-size: 0.9375rem;
}

.flecto-callout {
  background: #EDE9FE;
  border: 1px solid var(--line);
  padding: 20px 24px;
}

.flecto-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 24px;
}

.flecto-panel {
  background: var(--surface);
  border: 1.5px solid var(--accent);
  box-shadow: var(--shadow);
  padding: 28px 32px;
}

/* ---- Reveal Animation ---- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease-out, transform 0.55s ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.card-grid-3 .content-card:nth-child(1).is-visible,
.card-grid-2 .content-card:nth-child(1).is-visible,
.findings-grid .finding-card:nth-child(1).is-visible,
.metrics-grid .metric-card:nth-child(1).is-visible { transition-delay: 0ms; }

.card-grid-3 .content-card:nth-child(2).is-visible,
.card-grid-2 .content-card:nth-child(2).is-visible,
.findings-grid .finding-card:nth-child(2).is-visible,
.metrics-grid .metric-card:nth-child(2).is-visible { transition-delay: 80ms; }

.card-grid-3 .content-card:nth-child(3).is-visible,
.card-grid-2 .content-card:nth-child(3).is-visible,
.findings-grid .finding-card:nth-child(3).is-visible,
.metrics-grid .metric-card:nth-child(3).is-visible { transition-delay: 160ms; }

.card-grid-2 .content-card:nth-child(4).is-visible,
.metrics-grid .metric-card:nth-child(4).is-visible { transition-delay: 240ms; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Prefers Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .hero-content { animation: none; }
  .btn-primary:hover, .btn-secondary:hover { transform: none; }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  h2 { font-size: 1.6rem; }
  .hero { min-height: 400px; padding: 60px 20px; }
  .hero h1 { font-size: 1.75rem; }
  .metrics-grid,
  .card-grid-3,
  .findings-grid { grid-template-columns: 1fr; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .callout-metrics { gap: 20px; }
  .hero-achievements { gap: 8px; }
  .achievement-tag { font-size: 0.8rem; }
}

@media (max-width: 480px) {
  .container, .container-narrow { padding: 0 16px; }
  .algo-box { padding: 20px 16px; }
  .algo-code { font-size: 0.8rem; }
}