/* ALTO Expeditions — The Alpine Field Manual (whole-site redesign)
   Warm paper, near-black ink, alpine-red accent, fine rules,
   numbered modules, oversized route labels, CSS-only map lines. */
:root {
  --paper: #f2ecdd;
  --paper-2: #eae2cf;
  --paper-3: #f7f3e9;
  --ink: #1c1a15;
  --ink-soft: #3b372e;
  --muted: #6b6355;
  --muted-2: #8a8172;
  --line: rgba(28, 26, 21, 0.16);
  --line-soft: rgba(28, 26, 21, 0.09);
  --red: #b23a26;
  --red-deep: #8c2a1a;
  --focus: #7a2d1c;
  --header-h: 72px;
  --font: 'TikTok Sans', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --mono: ui-monospace, 'SF Mono', 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.62;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.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;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -52px;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  font-size: 0.9rem;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- Route markers & global marker ---------- */
.route-marker, .global-marker {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--line);
  background: var(--paper-3);
  padding: 4px 9px;
}

/* ---------- Eyebrow / module labels ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--red);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(242, 236, 221, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ink);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: var(--header-h);
}
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 24px; height: 24px; color: var(--ink); }
.brand-text {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  line-height: 1.15;
}
.brand-text small {
  display: block;
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.38em;
  color: var(--muted);
}
.main-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.88rem;
}
.main-nav a {
  color: var(--muted);
  position: relative;
  padding: 6px 0;
  transition: color 0.25s ease;
}
.main-nav a:hover { color: var(--ink); }
.main-nav a[aria-current="page"] { color: var(--ink); font-weight: 560; }
.main-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--red);
}
.header-actions { display: flex; align-items: center; gap: 12px; }
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--ink);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: var(--paper-3);
  transition: background 0.25s ease;
}
.menu-toggle:hover { background: var(--paper-2); }
.menu-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
.mobile-menu {
  border-top: 1px solid var(--ink);
  background: var(--paper);
}
.mobile-menu nav {
  display: flex;
  flex-direction: column;
  padding: 10px 24px 20px;
}
.mobile-menu a {
  padding: 13px 0;
  font-size: 1.02rem;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  transition: color 0.2s ease;
}
.mobile-menu a:hover { color: var(--ink); }
.mobile-menu a[aria-current="page"] { color: var(--ink); font-weight: 560; }
.mobile-menu .btn { margin-top: 16px; justify-content: center; }