/* The app's look (frontend/theme.js, DESIGN_BRIEF.md direction D): pure black, hairlines
   instead of filled cards, Instrument Sans for reading, Martian Mono for labels, one cyan accent. */

:root {
  --bg: #000;
  --surface: #0c0c0c;
  --line: #1a1a1a;
  --border: #2a2a2a;
  --text: #e8e8e8;
  --soft: #b8b8b8;
  --muted: #8a8a8a;
  --faint: #6e6e6e;
  --accent: #5eead4;
  --accent-dim: #1f3a35;
  --heart: #fb7185;
  --workout: #facc15;
  --sans: "Instrument Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "Martian Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--soft);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 640px; }

.label {
  font-family: var(--mono);
  font-weight: 300;
  font-size: 11px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--muted);
}

/* Header */
.top { border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand svg { width: 26px; height: 26px; }
.brand span { font-family: var(--mono); font-weight: 300; font-size: 12px; letter-spacing: 2.4px; }
.top nav { display: flex; gap: 24px; }
.top nav a { font-family: var(--mono); font-weight: 300; font-size: 11px; letter-spacing: 1.6px; color: var(--muted); }
.top nav a:hover, .top nav a[aria-current] { color: var(--text); text-decoration: none; }

/* Home: hero */
.hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 56px; align-items: center; padding-top: 88px; padding-bottom: 96px; }
.hero h1 {
  color: var(--text);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.04;
  letter-spacing: -2px;
  margin: 18px 0 22px;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lede { font-size: 18px; line-height: 1.6; max-width: 30em; margin: 0 0 32px; }
.pill {
  display: inline-flex; align-items: center; gap: 10px;
  border: 1px solid var(--border); border-radius: 999px;
  padding: 10px 18px;
  font-family: var(--mono); font-weight: 300; font-size: 11px; letter-spacing: 1.4px;
  color: var(--text);
}
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* Home: the sample run, drawn like the app's run detail */
.phone {
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 26px 22px 24px;
  background: var(--bg);
  box-shadow: 0 0 0 8px var(--surface), 0 30px 80px -20px rgba(94, 234, 212, 0.12);
}
.phone .meta { display: flex; justify-content: space-between; align-items: center; }
.chip {
  font-family: var(--mono); font-weight: 300; font-size: 9px; letter-spacing: 1.2px;
  border: 1px solid currentColor; border-radius: 999px; padding: 3px 8px;
}
.chip.workout { color: var(--workout); }
.phone h3 { color: var(--text); font-weight: 500; font-size: 22px; letter-spacing: -0.5px; margin: 8px 0 2px; }
.big { color: var(--text); font-size: 44px; letter-spacing: -1.4px; line-height: 1.1; }
.big small { font-family: var(--mono); font-weight: 300; font-size: 12px; letter-spacing: 1px; color: var(--muted); margin-left: 6px; }
.read { border-left: 2px solid var(--accent); padding: 2px 0 2px 14px; margin: 20px 0; }
.read p { color: var(--text); font-size: 14px; line-height: 1.6; margin: 8px 0 0; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); padding-top: 14px; }
.stats div { color: var(--text); font-size: 17px; }
.stats .label { display: block; font-size: 9px; letter-spacing: 1.2px; margin-bottom: 2px; }
.reps { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 12px; }
.rep { display: grid; grid-template-columns: 22px 1fr auto auto; gap: 12px; align-items: center; padding: 5px 0; font-size: 13px; }
.rep .n { font-family: var(--mono); font-weight: 300; font-size: 10px; color: var(--faint); }
.rep .bar { height: 3px; border-radius: 2px; background: var(--accent); opacity: 0.85; }
.rep .t { color: var(--text); font-variant-numeric: tabular-nums; }
.rep .hr { color: var(--heart); font-family: var(--mono); font-weight: 300; font-size: 11px; width: 36px; text-align: right; }
.caption { margin-top: 14px; text-align: center; }

/* Home: features as hairline rows */
.section { border-top: 1px solid var(--line); padding: 72px 0; }
.section h2 { color: var(--text); font-weight: 500; font-size: 30px; letter-spacing: -0.6px; margin: 12px 0 40px; }
.rows { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.row { padding: 28px 28px 28px 0; border-bottom: 1px solid var(--line); }
.row:nth-child(odd) { border-right: 1px solid var(--line); }
.row:nth-child(even) { padding-left: 28px; }
.row h3 { color: var(--text); font-weight: 500; font-size: 18px; margin: 10px 0 6px; }
.row p { margin: 0; font-size: 15px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; }
.step { border: 1px solid var(--border); border-radius: 20px; padding: 24px; }
.step h3 { color: var(--text); font-weight: 500; font-size: 17px; margin: 12px 0 6px; }
.step p { margin: 0; font-size: 15px; }

/* Documents: privacy, support */
.doc { padding-top: 64px; padding-bottom: 80px; }
.doc h1 { color: var(--text); font-weight: 500; font-size: 30px; letter-spacing: -0.6px; margin: 12px 0 6px; }
.doc h2 { color: var(--text); font-weight: 500; font-size: 18px; margin: 36px 0 8px; padding-top: 28px; border-top: 1px solid var(--line); }
.doc h3 { color: var(--text); font-weight: 500; font-size: 16px; margin: 22px 0 4px; }
.doc ul { padding-left: 20px; }
.doc li { margin: 6px 0; }
.doc strong { color: var(--text); font-weight: 500; }
.callout { border-left: 2px solid var(--accent); padding: 2px 0 2px 16px; margin: 28px 0; color: var(--text); }
.table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
.table td { border-top: 1px solid var(--line); padding: 12px 12px 12px 0; vertical-align: top; }
.table td:first-child { color: var(--text); white-space: nowrap; width: 1%; }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; }
footer .links { display: flex; gap: 24px; }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }
footer p { margin: 0; font-size: 13px; color: var(--faint); }

@media (max-width: 820px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 48px; padding-top: 56px; padding-bottom: 64px; }
  .phone { padding: 22px 18px; }
  .stats div { font-size: 15px; }
  .rows { grid-template-columns: minmax(0, 1fr); }
  .row, .row:nth-child(even) { padding: 24px 0; border-right: 0; }
  .row:nth-child(odd) { border-right: 0; }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .section { padding: 56px 0; }
  .top nav { gap: 16px; }
}