/* History XXI — marketing site. Editorial, warm, quiet; matches the app's
   Liquid Glass palette (parchment, dark-red accent, Newsreader serif). */

:root {
  --bg: #ECE6D8;
  --bg-panel: #F5F1E7;
  --ink: #1C1A16;
  --muted: #6E6656;
  --faint: #9A917E;
  --accent: #7A2E22;
  --accent-2: #5A2018;
  --gain: #3E6B4F;
  --loss: #9A2B22;
  --hairline: rgba(28, 26, 22, 0.12);
  --hairline-soft: rgba(28, 26, 22, 0.07);
  --shadow: 0 1px 2px rgba(28, 26, 22, 0.06), 0 8px 30px rgba(28, 26, 22, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17150F;
    --bg-panel: #201D16;
    --ink: #F2EFE6;
    --muted: #B4AB98;
    --faint: #837A68;
    --accent: #C6624E;
    --accent-2: #D98B78;
    --hairline: rgba(242, 239, 230, 0.14);
    --hairline-soft: rgba(242, 239, 230, 0.08);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 34px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Newsreader", Georgia, "Times New Roman", serif;
  font-size: 19px;
  line-height: 1.55;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* faint topographic waves, like the app's era backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 80% -10%, rgba(122, 46, 34, 0.05), transparent 60%),
    radial-gradient(100% 60% at -10% 110%, rgba(122, 46, 34, 0.04), transparent 55%);
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; text-underline-offset: 3px; }

.wrap { max-width: 940px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 720px; }

/* --- mono label, the app's signature uppercase tracked caption --- */
.mono {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

/* --- top bar --- */
header.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 22px 24px;
  max-width: 940px;
  margin: 0 auto;
}
.wordmark {
  font-weight: 640;
  font-size: 26px;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.wordmark small {
  display: block;
  font-family: ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  margin-top: 2px;
}
header.top nav a { margin-left: 22px; color: var(--muted); font-size: 16px; }
header.top nav a:hover { color: var(--accent); }

/* --- hero --- */
.hero { padding: 64px 0 40px; }
.hero .kicker { color: var(--accent); }
.hero h1 {
  font-size: clamp(44px, 8vw, 88px);
  line-height: 1.02;
  font-weight: 620;
  letter-spacing: -0.015em;
  margin: 14px 0 0;
}
.rule { width: 64px; height: 3px; background: var(--accent); border: 0; margin: 22px 0; }
.hero p.lede {
  font-size: clamp(20px, 3vw, 26px);
  font-style: italic;
  color: var(--muted);
  max-width: 640px;
  margin: 0 0 30px;
}

/* --- buttons --- */
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: ui-monospace, monospace;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 22px;
  border-radius: 14px;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #F5F1E7; }
.btn-primary:hover { background: var(--accent-2); color: #F5F1E7; text-decoration: none; }
.btn-ghost { border-color: var(--hairline); color: var(--muted); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.cta-note { color: var(--faint); font-size: 15px; }

/* --- century timeline --- */
.timeline { margin: 48px 0 8px; }
.timeline .track {
  position: relative;
  height: 2px;
  background: var(--hairline);
  margin: 26px 0 12px;
}
.timeline .beats { display: flex; }
.timeline .beat { flex: 1; text-align: center; position: relative; }
.timeline .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--loss); margin: -30px auto 10px; position: relative;
}
.timeline .beat.open .dot { background: transparent; border: 1.5px solid var(--muted); }
.timeline .yr { font-family: ui-monospace, monospace; font-weight: 600; font-size: 14px; color: var(--ink); }
.timeline .lbl { display: block; font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); }

/* --- sections --- */
section.block { padding: 46px 0; border-top: 1px solid var(--hairline-soft); }
section.block h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 8px 0 14px;
}
section.block p { color: var(--muted); max-width: 660px; }
section.block p.body { color: var(--ink); }

/* --- feature grid / cards --- */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 26px; }
.card {
  background: var(--bg-panel);
  border: 1px solid var(--hairline-soft);
  border-radius: 18px;
  padding: 22px 22px 24px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 6px 0 8px; font-size: 22px; font-weight: 600; }
.card p { font-size: 17px; margin: 0; color: var(--muted); }
.card .num { font-family: ui-monospace, monospace; color: var(--accent); font-size: 13px; letter-spacing: 0.1em; }

/* --- question list --- */
.questions { list-style: none; padding: 0; margin: 24px 0 0; }
.questions li {
  display: flex; gap: 16px; align-items: baseline;
  padding: 14px 0; border-bottom: 1px solid var(--hairline-soft);
}
.questions .q-n {
  font-family: ui-monospace, monospace; color: var(--accent);
  font-size: 14px; min-width: 26px;
}
.questions .q-t { font-weight: 600; }
.questions .q-d { color: var(--muted); }

/* --- prose (support / privacy) --- */
.prose h1 { font-size: clamp(34px, 6vw, 52px); font-weight: 620; letter-spacing: -0.015em; margin: 8px 0 4px; }
.prose h2 { font-size: 26px; font-weight: 600; margin: 36px 0 8px; }
.prose h3 { font-size: 20px; font-weight: 600; margin: 24px 0 6px; }
.prose p, .prose li { color: var(--ink); }
.prose p { margin: 12px 0; }
.prose ul { padding-left: 22px; }
.prose li { margin: 8px 0; }
.prose .updated { color: var(--faint); }
.prose strong { font-weight: 640; }

/* --- footer --- */
footer.site {
  border-top: 1px solid var(--hairline);
  margin-top: 40px;
  padding: 30px 0 60px;
}
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 10px 26px; align-items: center; justify-content: space-between; }
footer.site a { color: var(--muted); font-size: 15px; }
footer.site a:hover { color: var(--accent); }
footer.site .copy { color: var(--faint); font-size: 14px; font-family: ui-monospace, monospace; letter-spacing: 0.06em; }

@media (max-width: 680px) {
  body { font-size: 18px; }
  .grid { grid-template-columns: 1fr; }
  header.top nav a { margin-left: 16px; font-size: 15px; }
  .timeline .lbl { font-size: 8px; }
}