:root {
    --bg: #110F0E;
    --fg: #EFEBE6;
    --muted: #8A847C;
    --card: #1A1816;
    --border: #2A2724;
    --primary: #FB7813;
    --primary-ink: #1A0F06;
  }
  * { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; }
  body {
    background: var(--bg);
    color: var(--fg);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
  a { color: inherit; text-decoration: none; }
  .ssr-shell { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }
  header.site-nav {
    position: sticky; top: 0; z-index: 40;
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    background: rgba(17,15,14,0.8);
    border-bottom: 1px solid var(--border);
  }
  header.site-nav .inner {
    max-width: 1100px; margin: 0 auto; padding: 0 1.25rem;
    height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  }
  header.site-nav .brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 700; font-size: 0.95rem; }
  header.site-nav .brand img { height: 28px; width: 28px; border-radius: 6px; }
  header.site-nav nav { display: flex; gap: 0.25rem; flex-wrap: wrap; }
  header.site-nav nav a {
    padding: 0.4rem 0.75rem; border-radius: 8px; color: var(--muted);
    font-size: 0.875rem; font-weight: 500; transition: color 0.15s, background 0.15s;
  }
  header.site-nav nav a:hover { color: var(--fg); background: rgba(255,255,255,0.04); }
  header.site-nav nav a.active { color: var(--fg); background: rgba(255,255,255,0.06); }
  header.site-nav .nav-cta { padding: 0.4rem 0.85rem; border-radius: 8px; background: var(--primary); color: var(--primary-ink); font-weight: 600; font-size: 0.85rem; }
  main { min-height: 60vh; }
  section { padding: 3.5rem 1.25rem; max-width: 1100px; margin: 0 auto; }
  .hero { text-align: left; padding: 4.5rem 1.25rem; max-width: 1100px; margin: 0 auto; }
  .hero-compact { text-align: center; max-width: 800px; }
  .eyebrow {
    display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--primary); margin: 0 0 0.85rem;
  }
  h1 {
    font-family: 'Space Grotesk', -apple-system, sans-serif;
    font-size: clamp(2.25rem, 5vw, 3.75rem); font-weight: 700; line-height: 1.05;
    letter-spacing: -0.02em; margin: 0 0 1.25rem;
  }
  h2 {
    font-family: 'Space Grotesk', -apple-system, sans-serif;
    font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; line-height: 1.15;
    letter-spacing: -0.015em; margin: 0 0 1rem;
  }
  h3 {
    font-family: 'Space Grotesk', -apple-system, sans-serif;
    font-size: 1.1rem; font-weight: 600; margin: 0 0 0.5rem; letter-spacing: -0.01em;
  }
  .amber { color: var(--primary); }
  .lede { font-size: 1.05rem; color: var(--muted); max-width: 640px; margin: 0 0 1.75rem; }
  .section-lede { color: var(--muted); max-width: 640px; margin: 0 0 2rem; }
  p { margin: 0 0 1rem; color: var(--fg); }
  p.fineprint { color: var(--muted); font-size: 0.8rem; }
  p.fineprint.center { text-align: center; margin-top: 1.5rem; }
  .ctas { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0.5rem 0 1rem; }
  .cta {
    display: inline-block; padding: 0.7rem 1.1rem; border-radius: 10px;
    font-weight: 600; font-size: 0.95rem; line-height: 1;
    border: 1px solid transparent; transition: transform 0.1s ease;
  }
  .cta-primary { background: var(--primary); color: var(--primary-ink); }
  .cta-secondary { border-color: var(--border); color: var(--fg); }
  .cta:hover { transform: translateY(-1px); }
  .band { padding: 4rem 1.25rem; max-width: 1100px; margin: 0 auto; border-top: 1px solid var(--border); }
  .band-muted { background: rgba(255,255,255,0.02); border-radius: 0; max-width: none; }
  .band-muted > * { max-width: 1100px; margin-left: auto; margin-right: auto; }
  .band-cta { text-align: center; }
  .band-cta .ctas { justify-content: center; }
  .stat-row {
    list-style: none; padding: 0; margin: 0;
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; text-align: center;
  }
  .stat-row li strong {
    font-family: 'Space Grotesk', sans-serif;
    display: block; font-size: 1.75rem; color: var(--primary); font-weight: 700;
    font-variant-numeric: tabular-nums; letter-spacing: -0.01em;
  }
  .stat-row li span { font-size: 0.75rem; color: var(--muted); }
  .grid { display: grid; gap: 1rem; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .card {
    background: rgba(255,255,255,0.025);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.4rem;
  }
  .card p { font-size: 0.92rem; color: var(--muted); margin: 0; line-height: 1.5; }
  .bullets { list-style: none; padding: 0; margin: 1rem 0; }
  .bullets li {
    padding-left: 1.5rem; position: relative; margin-bottom: 0.55rem;
    font-size: 0.95rem; color: var(--fg);
  }
  .bullets li::before {
    content: ''; position: absolute; left: 0; top: 0.55rem;
    width: 0.5rem; height: 0.5rem; border-radius: 2px; background: var(--primary);
  }
  .feature-deep { padding: 3rem 1.25rem; }
  .feature-deep h2 { font-size: clamp(1.4rem, 2.5vw, 2rem); }
  .comparison-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.75rem; }
  .comparison-list li {
    display: grid; gap: 0.75rem; padding: 0.9rem 1rem;
    border: 1px solid var(--border); border-radius: 10px;
    background: rgba(255,255,255,0.015);
  }
  .comp-old { color: var(--muted); text-decoration: line-through; font-size: 0.9rem; }
  .comp-new { color: var(--fg); font-weight: 500; font-size: 0.95rem; }
  .faq details {
    border: 1px solid var(--border); border-radius: 10px;
    background: rgba(255,255,255,0.02); margin-bottom: 0.6rem; overflow: hidden;
  }
  .faq summary {
    list-style: none; cursor: pointer; padding: 1rem 1.2rem;
    font-weight: 600; font-size: 0.95rem;
  }
  .faq summary::-webkit-details-marker { display: none; }
  .faq details > p { padding: 0 1.2rem 1.2rem; color: var(--muted); font-size: 0.92rem; margin: 0; }
  .pricing-grid { gap: 1.25rem; }
  .pricing-card { padding: 1.75rem; }
  .pricing-highlight { border-color: rgba(251,120,19,0.45); background: rgba(251,120,19,0.04); }
  .pricing-card .price { margin: 0.25rem 0 0.25rem; font-size: 1.1rem; color: var(--muted); }
  .pricing-card .price strong {
    font-family: 'Space Grotesk', sans-serif; font-size: 2.5rem; color: var(--fg);
    font-weight: 700; letter-spacing: -0.02em;
  }
  .pricing-card .price-sub { font-size: 0.85rem; color: var(--muted); margin: 0 0 0.75rem; }
  footer.site-foot { border-top: 1px solid var(--border); background: rgba(255,255,255,0.02); padding: 2.5rem 1.25rem; margin-top: 3rem; }
  footer.site-foot .inner { max-width: 1100px; margin: 0 auto; display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
  footer.site-foot .brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; margin-bottom: 0.5rem; }
  footer.site-foot p { color: var(--muted); font-size: 0.85rem; margin: 0; max-width: 360px; }
  footer.site-foot nav { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.85rem; }
  footer.site-foot nav a { color: var(--muted); }
  footer.site-foot nav a:hover { color: var(--fg); }
  footer.site-foot .legal { color: var(--muted); font-size: 0.75rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
  /* ── Legal pages (privacy, terms) ────────────────────────────────── */
  .legal-prose { max-width: 800px; }
  .legal-prose h2 { margin-top: 2.5rem; font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
  .legal-prose h3 { margin-top: 1.5rem; font-size: 1rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
  .legal-prose p { font-size: 0.95rem; color: var(--fg); }
  .legal-prose a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
  .legal-prose ul.bullets { margin-top: 0.5rem; }
  .legal-prose ul.bullets li { color: var(--fg); }
  /* ── Contact page ────────────────────────────────── */
  .contact-grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
  .contact-card h2 { font-size: 1.15rem; margin-bottom: 0.5rem; }
  .contact-card p { color: var(--muted); font-size: 0.9rem; }
  .contact-card .contact-link { margin-top: 0.5rem; }
  .contact-card .contact-link a { color: var(--primary); font-weight: 600; font-size: 1rem; text-decoration: underline; text-underline-offset: 3px; word-break: break-all; }
  /* ── FAQ page (dedicated /faq route) ────────────────────────────── */
  .faq-group { margin-bottom: 2.25rem; }
  .faq-group h2 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); margin-bottom: 0.75rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border); }
  .faq-group details {
    border: 1px solid var(--border); border-radius: 10px;
    background: rgba(255,255,255,0.02); margin-bottom: 0.6rem; overflow: hidden;
  }
  .faq-group summary {
    list-style: none; cursor: pointer; padding: 1rem 1.2rem;
    font-weight: 600; font-size: 0.95rem; color: var(--fg);
  }
  .faq-group summary::-webkit-details-marker { display: none; }
  .faq-group details > p { padding: 0 1.2rem 1.2rem; color: var(--muted); font-size: 0.92rem; margin: 0; line-height: 1.65; }
  .faq-group details > p a { color: var(--primary); text-decoration: underline; }
  @media (min-width: 640px) {
    .stat-row { grid-template-columns: repeat(4, 1fr); }
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media (min-width: 900px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .comparison-list li { grid-template-columns: 1fr 1fr; }
  }
  /* ── Track pages (/tracks/<slug> and /tracks-directory) ────────── */
  .track-hero { padding-bottom: 2.5rem; }
  .track-dl {
    display: grid; gap: 0; margin: 0; padding: 0;
    grid-template-columns: 1fr;
    border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
  }
  .track-dl > div {
    display: grid; grid-template-columns: 140px 1fr; gap: 1rem;
    padding: 0.85rem 1.1rem; border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.015);
  }
  .track-dl > div:last-child { border-bottom: none; }
  .track-dl dt { color: var(--muted); font-size: 0.85rem; font-weight: 500; margin: 0; }
  .track-dl dd { color: var(--fg); font-size: 0.95rem; margin: 0; font-variant-numeric: tabular-nums; }
  .sun-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem;
    margin: 0.5rem 0 1.25rem;
  }
  .sun-cell {
    padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: 10px;
    background: rgba(255,255,255,0.02);
  }
  .sun-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.35rem; font-weight: 600; }
  .sun-value { font-family: 'Space Grotesk', sans-serif; font-size: 1.5rem; font-weight: 700; color: var(--fg); font-variant-numeric: tabular-nums; }
  .track-sun-note { color: var(--muted); font-size: 0.85rem; line-height: 1.55; }
  .track-sun-mount {
    min-height: 80px; padding: 1.25rem; border: 1px dashed var(--border);
    border-radius: 12px; background: rgba(255,255,255,0.015);
  }
  .track-sun-pending { color: var(--muted); margin: 0; font-style: italic; font-size: 0.92rem; }
  /* Filled in on load by the inline sun-chart client (sunCalc.mjs's
     liveSunScript) — same "dashed until data lands" treatment as the
     weather mount below it, computed the same way for the same reason
     (W-21: no longer baked in at build time). */
  .track-weather-mount {
    min-height: 120px; padding: 1.25rem; border: 1px dashed var(--border);
    border-radius: 12px; background: rgba(255,255,255,0.015);
  }
  .track-weather-pending { color: var(--muted); margin: 0; font-style: italic; font-size: 0.92rem; }
  /* Filled in on load by the inline live-weather client (liveWeather.mjs).
     The mount keeps its dashed placeholder border until data lands, then
     reads as a solid panel like the sun chart above it. */
  .track-weather-mount[data-state="ready"] { border-style: solid; }
  .wx-grid {
    display: grid; gap: 0.75rem;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  }
  .wx-cell {
    padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: 10px;
    background: rgba(255,255,255,0.02);
  }
  .wx-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.35rem; font-weight: 600; }
  .wx-value { font-family: 'Space Grotesk', sans-serif; font-size: 1.5rem; font-weight: 700; color: var(--fg); font-variant-numeric: tabular-nums; }
  .wx-unit { font-size: 0.8rem; font-weight: 600; color: var(--muted); margin-left: 0.25rem; }
  .wx-note { margin-top: 0.3rem; font-size: 0.78rem; color: var(--muted); }
  .wx-source { margin: 0.9rem 0 0; font-size: 0.82rem; color: var(--muted); line-height: 1.55; }
  /* Location map: a 3x3 grid of OpenStreetMap tiles rendered as plain images,
     mirroring src/components/TrackMap.tsx. The old Google Maps iframe was
     refused by x-frame-options and always rendered blank. */
  .track-map-frame {
    position: relative; border: 1px solid var(--border); border-radius: 12px;
    overflow: hidden; background: rgba(255,255,255,0.015);
  }
  .track-map-tiles { display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr); height: 360px; }
  .track-map-tiles img { width: 100%; height: 100%; object-fit: cover; display: block; }
  /* Centre pin, drawn in CSS so the page pulls in no icon asset. */
  .track-map-pin {
    position: absolute; left: 50%; top: 50%; width: 18px; height: 18px;
    margin: -9px 0 0 -9px; border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg); background: rgba(251,120,19,1);
    box-shadow: 0 2px 4px rgba(0,0,0,0.6); pointer-events: none;
  }
  .track-map-attribution {
    position: absolute; right: 0; bottom: 0; padding: 0.2rem 0.5rem;
    font-size: 0.65rem; color: var(--muted); background: rgba(17,15,14,0.8);
    border-top-left-radius: 6px; pointer-events: none;
  }
  .track-map-caption { margin-top: 0.75rem; color: var(--muted); font-size: 0.88rem; line-height: 1.55; }
  .track-map-caption a { color: var(--fg); text-decoration: underline; text-underline-offset: 2px; }
  .track-map-caption a:hover { color: rgba(251,120,19,1); }
  .related-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.6rem; }
  .related-list li a {
    display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
    padding: 0.85rem 1.1rem; border: 1px solid var(--border); border-radius: 10px;
    background: rgba(255,255,255,0.02); transition: background 0.15s, border-color 0.15s;
  }
  .related-list li a:hover { background: rgba(251,120,19,0.05); border-color: rgba(251,120,19,0.3); }
  .related-meta { color: var(--muted); font-size: 0.82rem; font-variant-numeric: tabular-nums; }
  /* ── Density altitude calculator (/density-altitude-calculator) ── */
  .da-calc { padding-top: 2.5rem; padding-bottom: 2.5rem; }
  .da-card {
    background: rgba(255,255,255,0.025);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
  }
  .da-grid {
    display: grid; gap: 1rem;
    grid-template-columns: 1fr;
    margin-bottom: 1.5rem;
  }
  .da-field label {
    display: block; font-size: 0.72rem; font-weight: 600; color: var(--muted);
    text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.4rem;
  }
  .da-field input {
    width: 100%; padding: 0.65rem 0.8rem;
    background: rgba(0,0,0,0.25); color: var(--fg);
    border: 1px solid var(--border); border-radius: 8px;
    font-family: 'Space Grotesk', sans-serif; font-size: 1rem;
    font-variant-numeric: tabular-nums;
  }
  .da-field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(251,120,19,0.15); }
  .da-hint { font-size: 0.7rem; color: var(--muted); margin: 0.35rem 0 0; line-height: 1.4; }
  .da-results {
    display: grid; gap: 0.75rem;
    grid-template-columns: repeat(2, 1fr);
  }
  .da-tile {
    padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: 10px;
    background: rgba(255,255,255,0.02);
  }
  .da-tile-accent {
    border-color: rgba(251,120,19,0.35);
    background: rgba(251,120,19,0.05);
  }
  .da-tile-label { font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 600; margin-bottom: 0.45rem; }
  .da-tile-value {
    font-family: 'Space Grotesk', sans-serif; font-size: 1.5rem; font-weight: 700;
    color: var(--fg); font-variant-numeric: tabular-nums; line-height: 1;
  }
  .da-tile-accent .da-tile-value { color: var(--primary); }
  .da-tile-sub { font-size: 0.7rem; color: var(--muted); margin-top: 0.4rem; font-variant-numeric: tabular-nums; }
  .da-summary { font-size: 0.85rem; color: var(--muted); margin: 1.25rem 0 0; line-height: 1.55; }
  .da-summary strong { color: var(--fg); }
  .da-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 1rem; }
  .da-locate-btn {
    display: inline-flex; align-items: center; gap: 0.45rem;
    padding: 0.5rem 0.85rem; border-radius: 8px;
    background: var(--primary); color: var(--primary-ink);
    border: none; font: inherit; font-size: 0.85rem; font-weight: 600;
    cursor: pointer; transition: opacity 0.15s, transform 0.1s;
  }
  .da-locate-btn:hover { transform: translateY(-1px); }
  .da-locate-btn:disabled { opacity: 0.65; cursor: progress; transform: none; }
  .da-locate-status {
    padding: 0.55rem 0.8rem; border-radius: 8px; font-size: 0.78rem;
    border: 1px solid var(--border); background: rgba(255,255,255,0.02);
    color: var(--muted); margin-bottom: 1rem;
  }
  .da-locate-status[data-state="success"] { border-color: rgba(251,120,19,0.35); background: rgba(251,120,19,0.06); color: var(--fg); }
  .da-locate-status[data-state="error"]   { border-color: rgba(220,80,80,0.4);  background: rgba(220,80,80,0.07);  color: #fca5a5; }
  .da-locate-status[data-state="loading"] { color: var(--muted); }
  @media (min-width: 700px) {
    .da-grid { grid-template-columns: 1fr 1fr; }
    .da-results { grid-template-columns: repeat(4, 1fr); }
  }
  /* ── Tracks directory ─────────────────────────────────────────── */
  .track-dir-group { padding: 1.5rem 1.25rem; max-width: 1100px; margin: 0 auto; border-top: 1px solid var(--border); }
  .track-dir-group h2 { margin-bottom: 0.75rem; display: flex; align-items: baseline; gap: 0.6rem; }
  .track-dir-count { color: var(--muted); font-size: 0.85rem; font-weight: 500; font-family: 'Inter', sans-serif; letter-spacing: 0; }
  .track-dir-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr; gap: 0.4rem; }
  .track-dir-list li a {
    display: flex; flex-direction: column; gap: 0.15rem; padding: 0.65rem 0.85rem;
    border: 1px solid var(--border); border-radius: 8px;
    background: rgba(255,255,255,0.015); transition: background 0.15s, border-color 0.15s;
  }
  .track-dir-list li a:hover { background: rgba(251,120,19,0.05); border-color: rgba(251,120,19,0.3); }
  .track-dir-name { font-size: 0.9rem; font-weight: 500; color: var(--fg); }
  .track-dir-loc { font-size: 0.75rem; color: var(--muted); }
  @media (min-width: 700px) {
    .sun-grid { grid-template-columns: repeat(4, 1fr); }
    .track-dir-list { grid-template-columns: repeat(2, 1fr); }
  }
  @media (min-width: 1000px) {
    .track-dir-list { grid-template-columns: repeat(3, 1fr); }
  }