/* Claw-Eval Paper - Synthetica Research Design System */
/* "The Quantum Library" - High-Tech Scholarly Editorial */

:root {
  --primary: #2E1065;
  --primary-dark: #170040;
  --accent: #06B6D4;
  --accent-light: #ACEDFF;
  --accent-dim: #4CD7F6;
  --bg: #FEF7FF;
  --surface: #FFFFFF;
  --surface-low: #F8F1FA;
  --surface-high: #ECE6EE;
  --text: #1D1B20;
  --text-muted: #494550;
  --line: #CBC4D2;
  --secondary: #64597B;
  --secondary-container: #E5D6FF;
  --error: #BA1A1A;
  --font-heading: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 8px;
  --shadow: 0 24px 48px rgba(29, 27, 32, 0.08);
  --max-width: 1120px;
}

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

body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h2 { font-size: 2rem; margin-bottom: 1.5rem; color: var(--primary); }
h3 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--primary-dark); }

section {
  padding: 80px 0;
}

.section-alt {
  background: var(--surface-low);
}

/* ===== HERO ===== */
.hero-section {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
  color: #fff;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('./assets/bg_hero.png') center / cover no-repeat;
  opacity: 0.15;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-light);
  border: 1px solid rgba(172, 237, 255, 0.3);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 24px;
}

.hero-section h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff, var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-authors {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
}

.hero-abstract {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 32px;
  text-align: left;
}

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

.btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.2s, transform 0.2s;
}

.btn:hover {
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* ===== METRICS ===== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.metric-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--accent);
}

.metric-number {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 12px;
}

.metric-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ===== GAP CARDS ===== */
.gap-cards {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}

.gap-card {
  background: var(--surface-low);
  border-radius: var(--radius);
  padding: 20px 24px;
  border-left: 4px solid var(--accent);
}

.gap-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(6, 182, 212, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

/* ===== PILLARS ===== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 32px 0;
}

.pillar-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  border-top: 2px solid var(--accent);
}

.pillar-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.pillar-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.pillar-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ===== FIGURES ===== */
.paper-figure {
  margin: 32px 0;
  text-align: center;
}

.paper-figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.paper-figure figcaption {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  text-align: left;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.fig-medium img {
  max-width: 600px;
}

/* ===== ANALYSIS ===== */
.analysis-block {
  margin-bottom: 64px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--line);
}

.analysis-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.figure-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 24px;
}

/* ===== DETAILS / ACCORDION ===== */
details {
  border-radius: var(--radius);
}

summary {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  padding: 16px 0;
  list-style: none;
}

summary::before {
  content: '\25B6  ';
  font-size: 0.8rem;
  transition: transform 0.2s;
  display: inline-block;
}

details[open] summary::before {
  transform: rotate(90deg);
}

summary::-webkit-details-marker { display: none; }

.case-study-content {
  padding: 24px 0;
}

/* ===== TAKEAWAYS ===== */
.takeaway-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.takeaway-list li {
  padding: 16px 20px;
  margin-bottom: 12px;
  background: var(--surface);
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow);
}

/* ===== REFERENCES ===== */
.references-list {
  padding-left: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  columns: 1;
}

.references-list li {
  margin-bottom: 8px;
  word-break: break-word;
}

/* ===== FLECTO EXPLANATION UI ===== */
.flecto-note,
.flecto-callout,
.flecto-card,
.flecto-panel {
  position: relative;
  border-radius: var(--radius);
  margin: 24px 0;
}

.flecto-note::before,
.flecto-callout::before,
.flecto-card::before,
.flecto-panel::before {
  content: '\1F916  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 {
  padding: 12px 16px;
  background: rgba(6, 182, 212, 0.06);
  border-left: 3px solid var(--accent);
  font-size: 0.92rem;
}

.flecto-callout {
  padding: 20px 24px;
  background: var(--secondary-container);
  border-radius: var(--radius);
}

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

.flecto-panel {
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .metrics-grid,
  .pillars-grid,
  .figure-pair {
    grid-template-columns: 1fr;
  }

  .hero-section h1 {
    font-size: 2rem;
  }

  h2 { font-size: 1.5rem; }

  section { padding: 48px 0; }

  .hero-section {
    padding: 80px 0 60px;
  }
}

/* ===== REVEAL ANIMATION ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}