/* juryrig — site stylesheet */

:root {
  color-scheme: light dark;

  /* ── Light mode (default) ── */
  --color-navy: #1a1a2e;
  --color-navy-mid: #16213e;
  --color-navy-light: #0f3460;
  --color-accent: #537ec5;
  --color-accent-hover: #4169a6;
  --color-text: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-light: #9ca3af;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-bg-card: #ffffff;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-positive: #27ae60;
  --color-negative: #c0392b;
  --color-warn: #e67e22;
  --color-heading: #1a1a2e;
  --color-hero-bg: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
  --color-header-bg: #1a1a2e;
  --color-insight-bg: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 100%);
  --color-insight-text: #16213e;
  --color-warning-bg: #fef9f0;
  --color-warning-text: #7c5a1e;
  --color-nonuse-bg: #fdf2f2;
  --color-nonuse-border: #fecaca;
  --color-nonuse-text: #991b1b;
  --color-nonuse-strong: #7f1d1d;
  --color-chart-grid: rgba(0, 0, 0, 0.08);
  --color-chart-text: #6b7280;
  --color-chart-muted: #d1d5db;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', Menlo, monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1100px;
  --transition: 0.2s ease;
}

/* ── Dark mode ── */
[data-theme="dark"] {
  --color-navy: #c5cfe0;
  --color-navy-mid: #a8b8d0;
  --color-navy-light: #8fa3c0;
  --color-accent: #7ba0e0;
  --color-accent-hover: #9ab8ec;
  --color-text: #d4d8e0;
  --color-text-secondary: #9ca3af;
  --color-text-light: #6b7280;
  --color-bg: #0f1117;
  --color-bg-alt: #181c28;
  --color-bg-card: #1a1e2c;
  --color-border: #2a3040;
  --color-border-light: #232838;
  --color-positive: #3ddb7a;
  --color-negative: #ef5350;
  --color-warn: #f0a050;
  --color-heading: #c5cfe0;
  --color-hero-bg: linear-gradient(135deg, #0a0d14 0%, #111828 100%);
  --color-header-bg: #0a0d14;
  --color-insight-bg: linear-gradient(135deg, #141828 0%, #1a2038 100%);
  --color-insight-text: #b0c0e0;
  --color-warning-bg: #1f1a10;
  --color-warning-text: #d4a84a;
  --color-nonuse-bg: #1f1214;
  --color-nonuse-border: #4a2020;
  --color-nonuse-text: #ef8080;
  --color-nonuse-strong: #f0a0a0;
  --color-chart-grid: rgba(255, 255, 255, 0.08);
  --color-chart-text: #9ca3af;
  --color-chart-muted: #3a4050;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.3);
}

/* Respect system preference as fallback if no data-theme set */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-navy: #c5cfe0;
    --color-navy-mid: #a8b8d0;
    --color-navy-light: #8fa3c0;
    --color-accent: #7ba0e0;
    --color-accent-hover: #9ab8ec;
    --color-text: #d4d8e0;
    --color-text-secondary: #9ca3af;
    --color-text-light: #6b7280;
    --color-bg: #0f1117;
    --color-bg-alt: #181c28;
    --color-bg-card: #1a1e2c;
    --color-border: #2a3040;
    --color-border-light: #232838;
    --color-positive: #3ddb7a;
    --color-negative: #ef5350;
    --color-warn: #f0a050;
    --color-heading: #c5cfe0;
    --color-hero-bg: linear-gradient(135deg, #0a0d14 0%, #111828 100%);
    --color-header-bg: #0a0d14;
    --color-insight-bg: linear-gradient(135deg, #141828 0%, #1a2038 100%);
    --color-insight-text: #b0c0e0;
    --color-warning-bg: #1f1a10;
    --color-warning-text: #d4a84a;
    --color-nonuse-bg: #1f1214;
    --color-nonuse-border: #4a2020;
    --color-nonuse-text: #ef8080;
    --color-nonuse-strong: #f0a0a0;
    --color-chart-grid: rgba(255, 255, 255, 0.08);
    --color-chart-text: #9ca3af;
    --color-chart-muted: #3a4050;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.3);
  }
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  transition: background 0.3s ease, color 0.3s ease;
}

/* ── Typography ─────────────────────────────────────────── */
h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; color: var(--color-heading); }
h1 { font-size: 2.25rem; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; letter-spacing: -0.01em; margin-top: 3rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.1rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }
p { margin-bottom: 1rem; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); text-decoration: underline; }
strong { font-weight: 600; }
code { font-family: var(--font-mono); font-size: 0.875em; background: var(--color-bg-alt); padding: 0.15em 0.4em; border-radius: 4px; color: var(--color-text); }
hr { border: none; border-top: 1px solid var(--color-border); margin: 2.5rem 0; }

/* ── Header / Nav ───────────────────────────────────────── */
.site-header {
  background: var(--color-header-bg);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-logo:hover { color: var(--color-accent); text-decoration: none; }
.site-logo .logo-accent { color: var(--color-accent); }

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
}

.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.1); text-decoration: none; }
.nav-links a.active { color: #fff; background: rgba(83,126,197,0.3); }

.theme-toggle {
  background: none;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover { background: rgba(255,255,255,0.1); color: #fff; border-color: rgba(255,255,255,0.3); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  background: var(--color-hero-bg);
  color: #fff;
  padding: 4rem 1.5rem 3rem;
}

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

.hero h1 { color: #fff; font-size: 2.75rem; margin-bottom: 1rem; }
.hero .subtitle { font-size: 1.15rem; color: rgba(255,255,255,0.8); max-width: 700px; line-height: 1.6; }

/* ── Stats Row ──────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.stat-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  text-align: center;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.stat-card .stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.6);
  margin-top: 0.25rem;
}

/* ── Content ────────────────────────────────────────────── */
.content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.page-intro {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 750px;
  margin-bottom: 2.5rem;
}

/* ── Section ────────────────────────────────────────────── */
.section { margin-bottom: 3rem; }

.section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-heading);
  padding-bottom: 0.5rem;
}

.section-header h2 { margin: 0; }
.section-header .section-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 600;
}

/* ── Cards ──────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.card h3 { margin-top: 0; color: var(--color-heading); }
.card p { color: var(--color-text-secondary); font-size: 0.95rem; }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: 0.75rem;
}

.card-link:hover { gap: 0.5rem; }
.card-link::after { content: '\2192'; transition: margin-left var(--transition); }

/* ── Chart Container ────────────────────────────────────── */
.chart-container {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
}

.chart-container h3 {
  margin-top: 0;
  margin-bottom: 0.25rem;
  font-size: 1.1rem;
}

.chart-container .chart-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.chart-canvas-wrap {
  position: relative;
  width: 100%;
}

.chart-canvas-wrap canvas { width: 100% !important; }

.chart-canvas-wrap.tall { min-height: 500px; }
.chart-canvas-wrap.very-tall { min-height: 800px; }

.chart-note {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: 0.75rem;
  font-style: italic;
}

/* ── Tables ─────────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1rem 0;
}

.data-table th {
  text-align: left;
  font-weight: 600;
  color: var(--color-heading);
  border-bottom: 2px solid var(--color-heading);
  padding: 0.75rem 1rem;
  white-space: nowrap;
}

.data-table td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
}

.data-table tr:hover td { background: var(--color-bg-alt); }

.data-table .num {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.data-table .highlight { font-weight: 600; color: var(--color-heading); }

/* ── Key Insight Box ────────────────────────────────────── */
.insight-box {
  background: var(--color-insight-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.insight-box p { margin-bottom: 0; color: var(--color-insight-text); }
.insight-box strong { color: var(--color-heading); }

/* ── Limitation / Warning Box ───────────────────────────── */
.warning-box {
  background: var(--color-warning-bg);
  border-left: 4px solid var(--color-warn);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.warning-box p { margin-bottom: 0; color: var(--color-warning-text); }

/* ── Non-use Banner ─────────────────────────────────────── */
.non-use-banner {
  background: var(--color-nonuse-bg);
  border: 1px solid var(--color-nonuse-border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  color: var(--color-nonuse-text);
}

.non-use-banner strong { color: var(--color-nonuse-strong); }

/* ── FAQ Accordion ──────────────────────────────────────── */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: var(--color-bg-alt);
  border: none;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  transition: background var(--transition);
}

.faq-question:hover { background: var(--color-border-light); }

.faq-question::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  transition: transform var(--transition);
}

.faq-item.open .faq-question::after { content: '\2212'; }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 1rem 1.25rem 1.25rem;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.faq-item.open .faq-answer { max-height: 500px; }

/* ── Tabs ───────────────────────────────────────────────── */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 1.5rem;
  gap: 0;
}

.tab-btn {
  background: none;
  border: none;
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: var(--font-sans);
  transition: all var(--transition);
}

.tab-btn:hover { color: var(--color-heading); }
.tab-btn.active { color: var(--color-accent); border-bottom-color: var(--color-accent); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Details / Summary ──────────────────────────────────── */
summary { color: var(--color-accent); }

/* ── Footer ─────────────────────────────────────────────── */
.site-footer {
  background: var(--color-header-bg);
  color: rgba(255,255,255,0.6);
  padding: 2rem 1.5rem;
  font-size: 0.85rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-inner a { color: rgba(255,255,255,0.8); }
.footer-inner a:hover { color: #fff; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.4rem; }
  .hero { padding: 2.5rem 1rem 2rem; }
  .hero h1 { font-size: 2rem; }

  .header-inner { height: 56px; }

  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-header-bg);
    flex-direction: column;
    padding: 0.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    box-shadow: var(--shadow-lg);
  }

  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.75rem 1rem; }

  .stats-row { grid-template-columns: repeat(2, 1fr); }

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

  .chart-container { padding: 1rem; }

  .content { padding: 1.5rem 1rem 3rem; }

  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 0.5rem 0.5rem; }

  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr; }
  .stat-card .stat-value { font-size: 1.5rem; }
}

/* ── Print ──────────────────────────────────────────────── */
@media print {
  .site-header, .site-footer, .nav-toggle, .theme-toggle { display: none; }
  .hero { background: #f5f5f5; color: #1a1a2e; padding: 1.5rem; }
  .hero h1, .hero .subtitle { color: #1a1a2e; }
  .card { break-inside: avoid; }
  .chart-container { break-inside: avoid; }
}