:root {
  --bg: #0d1117;
  --bg-surface: #161b22;
  --bg-card: #1c2128;
  --accent: #0d9488;
  --accent-dim: #0d948820;
  --accent-mid: #0d948850;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-dim: #484f58;
  --border: #30363d;
  --border-light: #21262d;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* NAV */
nav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo, a.nav-logo {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  text-decoration: none;
  cursor: pointer;
}

.nav-logo span, a.nav-logo span { color: var(--accent); }
a.nav-logo:hover { opacity: 0.8; text-decoration: none; }

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: color 0.15s;
}

.nav-links a:hover { color: var(--text); text-decoration: none; }

/* HERO */
.hero {
  padding: 72px 24px 56px;
  max-width: 880px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 16px;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 560px;
  margin-bottom: 32px;
}

.meta-bar {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  border-top: 1px solid var(--border-light);
  padding-top: 20px;
}

.meta-bar span { display: flex; align-items: center; gap: 6px; }
.meta-bar .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); display: inline-block; }

/* SECTIONS */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 48px 24px;
  max-width: 960px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 28px;
}

/* BENCHMARK TABLE */
.bench-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 32px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead {
  background: var(--bg-surface);
}

th {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
  vertical-align: top;
}

tr:last-child td { border-bottom: none; }

tbody tr:hover { background: var(--bg-surface); }

.num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.num.green { color: var(--green); }
.num.yellow { color: var(--yellow); }
.num.red { color: var(--red); }

.industry-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
}

/* PERCENTILE BARS */
.percentile-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.pbar {
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  flex: 1;
  position: relative;
  overflow: hidden;
}

.pbar-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--accent);
  transition: width 0.4s ease;
}

/* CALCULATOR */
.calc-box {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  margin-bottom: 32px;
}

.calc-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.calc-title::before {
  content: '⟩';
  color: var(--accent);
  font-size: 16px;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

input[type="number"], select {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 9px 12px;
  border-radius: 6px;
  outline: none;
  transition: border-color 0.15s;
}

input[type="number"]:focus, select:focus {
  border-color: var(--accent);
}

select option { background: var(--bg-card); }

.calc-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 10px 24px;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.15s;
}

.calc-btn:hover { opacity: 0.85; }

.calc-result {
  margin-top: 20px;
  background: var(--bg-card);
  border: 1px solid var(--accent-mid);
  border-radius: 8px;
  padding: 20px;
  display: none;
}

.calc-result.visible { display: block; }

.result-verdict {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
}

.result-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* INSIGHT CARDS */
.insight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.insight-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

.insight-card .metric-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 4px;
}

.insight-card .metric-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.insight-card .metric-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* BREADCRUMB */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  padding: 12px 24px;
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  gap: 6px;
  align-items: center;
}

.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); text-decoration: none; }
.breadcrumb .sep { color: var(--text-dim); }

/* SOURCE FOOTER */
.source-note {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 14px 18px;
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 32px;
}

.source-note strong { color: var(--text-muted); font-family: var(--font-mono); }

/* SITE FOOTER */
footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  margin-top: 64px;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.footer-brand span { color: var(--accent); }

.footer-desc {
  font-size: 12px;
  color: var(--text-dim);
  max-width: 360px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: right;
}

.footer-links a {
  font-size: 12px;
  color: var(--text-dim);
}

.footer-links a:hover { color: var(--accent); text-decoration: none; }

.footer-bottom {
  max-width: 960px;
  margin: 24px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* BENCHMARK INDEX CARDS */
.bench-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.bench-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.15s;
  display: block;
  color: var(--text);
}

.bench-card:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.bench-card-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.bench-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.bench-card-preview {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.bench-card-desc {
  font-size: 12px;
  color: var(--text-dim);
}

/* RESPONSIVE */
@media (max-width: 640px) {
  nav { padding: 0 16px; }
  .nav-links { gap: 14px; }
  .hero { padding: 48px 16px 36px; }
  section { padding: 32px 16px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { text-align: left; }
  .calc-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}