/* Trailhead — hiking guide. Topographic / outdoor-gear look. */
:root {
  --bg: #f5f6f2;
  --bg-deep: #ecede6;
  --ink: #24312a;
  --ink-soft: #4c5a52;
  --line: #d3d8cd;
  --line-soft: #e3e6dd;
  --pine: #2f5d43;
  --pine-dark: #244a35;
  --moss: #4a7c59;
  --brown: #7a5c3a;
  --brown-dark: #5f4630;
  --tan: #b08d57;
  --easy: #4c7a4c;
  --moderate: #c98a2d;
  --hard: #a94438;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body.trail {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(47,93,67,0.05) 0 2px, transparent 3px),
    radial-gradient(circle at 70% 60%, rgba(47,93,67,0.05) 0 2px, transparent 3px),
    radial-gradient(circle at 40% 85%, rgba(47,93,67,0.05) 0 2px, transparent 3px);
}

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

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg-deep); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 34px; height: 34px; color: var(--pine); flex: 0 0 auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-weight: 800; font-size: 21px; letter-spacing: -0.01em; }
.brand-tag { font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--brown); }
.main-nav { display: flex; gap: 26px; }
.main-nav a { font-size: 14px; font-weight: 600; color: var(--ink-soft); }
.main-nav a:hover { color: var(--pine); }

/* Hero */
.hero { padding: 56px 0 40px; }
.hero-kicker { font-family: var(--mono); font-size: 12px; letter-spacing: 0.22em; color: var(--brown); text-transform: uppercase; margin: 0 0 12px; }
.hero h1 { font-weight: 800; font-size: 42px; line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.01em; }
.hero-lede { font-size: 19px; line-height: 1.55; color: var(--ink-soft); max-width: 640px; margin: 0; }

.section-label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--brown); margin: 0 0 18px; padding-bottom: 8px; border-bottom: 2px solid var(--pine); display: inline-block; }

/* Legend */
.legend { padding: 8px 20px 32px; }
.legend-list { list-style: none; margin: 0; padding: 0; display: flex; gap: 28px; flex-wrap: wrap; }
.legend-list li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--ink-soft); }
.chip { display: inline-block; padding: 2px 10px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: #fff; }
.diff-easy { background: var(--easy); }
.diff-moderate { background: var(--moderate); }
.diff-hard { background: var(--hard); }

/* Categories */
.category-nav { padding: 8px 20px 36px; }
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.category-card { display: flex; flex-direction: column; gap: 6px; padding: 18px 16px; border: 1px solid var(--line); border-top: 3px solid var(--pine); background: #fff; color: var(--ink); }
.category-card:hover { border-color: var(--pine); text-decoration: none; }
.category-count { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--brown); }
.category-name { font-weight: 800; font-size: 18px; }

/* Group sections */
.group-section { padding: 24px 20px 8px; }
.group-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 16px; }
.group-head h2 { font-size: 25px; font-weight: 800; margin: 0; }
.group-more { font-size: 13px; font-weight: 600; color: var(--brown); text-transform: uppercase; letter-spacing: 0.04em; }

/* Trail cards */
.trail-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.trail-card { display: flex; flex-direction: column; gap: 5px; padding: 16px; border: 1px solid var(--line); background: #fff; color: var(--ink); }
.trail-card:hover { border-color: var(--pine); text-decoration: none; box-shadow: 0 1px 0 var(--line-soft); }
.trail-difficulty { align-self: flex-start; display: inline-block; padding: 2px 10px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: #fff; }
.trail-title { font-weight: 800; font-size: 17px; line-height: 1.25; }
.trail-zh { font-size: 13px; color: var(--brown); }
.trail-stats { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); }
.trail-desc { font-size: 14px; color: var(--ink-soft); }

/* Page head */
.page-head { padding: 40px 20px 20px; }
.crumb { font-size: 13px; color: var(--ink-soft); margin: 0 0 10px; }
.crumb a { color: var(--brown); }
.page-head h1 { font-size: 36px; font-weight: 800; line-height: 1.15; margin: 0 0 8px; }
.zh-sub { font-size: 15px; color: var(--brown); margin: 0 0 4px; }
.lede { color: var(--ink-soft); font-size: 15px; margin: 0 0 16px; }

/* Entry layout */
.layout { display: grid; grid-template-columns: 300px 1fr; gap: 32px; padding: 8px 20px 48px; align-items: start; }

.trailcard { position: sticky; top: 20px; border: 1px solid var(--line); background: #fff; }
.trailcard-head { display: flex; align-items: center; justify-content: space-between; background: var(--brown-dark); padding: 10px 14px; }
.trailcard-head .difficulty { display: inline-block; padding: 2px 10px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: #fff; }
.trailcard-label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: #e9dcc4; }
.trail-spec { margin: 0; padding: 6px 14px; }
.spec-row { display: flex; justify-content: space-between; gap: 10px; padding: 8px 0; border-bottom: 1px dotted var(--line-soft); }
.spec-row dt { font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--brown); }
.spec-row dd { margin: 0; font-size: 14px; font-weight: 600; text-align: right; }
.side-title { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--brown); margin: 18px 14px 8px; }
.gear { margin: 0 14px; padding: 0; list-style: none; }
.gear li { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; color: var(--ink-soft); padding: 4px 0; }
.gear-num { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; flex: 0 0 auto; background: var(--pine); color: #fff; font-family: var(--mono); font-size: 12px; }
.hazards { margin: 0 14px 18px; padding-left: 18px; font-size: 14px; color: var(--ink-soft); }
.hazards li { margin: 4px 0; }

/* Prose */
.prose { font-size: 17px; line-height: 1.72; color: var(--ink); }
.prose h2 { font-size: 24px; font-weight: 800; line-height: 1.2; margin: 0 0 12px; padding-bottom: 6px; border-bottom: 2px solid var(--line); }
.sec { margin-bottom: 28px; }
.sec-num { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; margin-right: 8px; font-family: var(--mono); font-size: 13px; color: #fff; background: var(--pine); }
.prose p { margin: 0 0 16px; }
.related-list { list-style: none; padding: 0; margin: 0; }
.related-list li { padding: 8px 0; border-bottom: 1px dotted var(--line-soft); }
.related-list a { font-size: 17px; font-weight: 600; }

.category-nav-inline { padding: 24px 20px 48px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-deep); margin-top: 24px; }
.footer-inner { display: flex; flex-direction: column; gap: 14px; padding: 32px 20px 40px; }
.footer-brand .brand-name { font-size: 20px; font-weight: 800; }
.footer-brand p { margin: 4px 0 0; color: var(--ink-soft); font-size: 14px; }
.footer-nav { display: flex; gap: 22px; }
.footer-nav a { font-size: 13px; color: var(--ink-soft); text-transform: uppercase; }
.copyright { font-size: 13px; color: var(--ink-soft); margin: 0; }

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .trailcard { position: static; }
  .hero h1 { font-size: 32px; }
  .page-head h1 { font-size: 28px; }
  .main-nav { gap: 16px; }
}