:root {
  --paper: #F4EEE0;
  --canvas: #DED5C2;
  --card: #FFFFFF;
  --inset: #EAE1CD;
  --ink: #241F1A;
  --muted: #6B6155;
  --faint: #8A7E6B;
  --hairline: #E7DDC8;
  --rule: #DBD0BB;
  --run: #C0492A;
  --walk: #6E7A35;
  --ride: #1F7A72;
  --gold: #C98A1E;
  --hero: #241F1A;
  --hero-ink: #F4EEE0;
  --display: ui-rounded, "SF Pro Rounded", "Nunito", system-ui, -apple-system, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #141210;
    --canvas: #0F0D0B;
    --card: #201D18;
    --inset: #1A1713;
    --ink: #F1E9D8;
    --muted: #9A9083;
    --faint: #7A7164;
    --hairline: #26221B;
    --rule: #3A342B;
    --run: #E06A3E;
    --walk: #A7B24A;
    --ride: #35A79B;
    --gold: #E3B34A;
    --hero: #201D18;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--body);
}

a { color: var(--run); text-underline-offset: 3px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }

.eyebrow {
  font: 600 12px/1.4 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 10px;
}

.site-header { border-bottom: 1px solid var(--hairline); }

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font: 900 22px/1 var(--display);
}

.mark { display: inline-flex; gap: 5px; }
.mark i { display: block; width: 11px; height: 11px; border-radius: 3.5px; }
.mark i:nth-child(1) { background: var(--run); }
.mark i:nth-child(2) { background: var(--walk); }
.mark i:nth-child(3) { background: var(--ride); }

.site-nav { display: flex; gap: 20px; }

.site-nav a {
  font: 600 12px/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }

.hero { padding: 72px 0 56px; }

.hero-icon {
  width: 112px;
  height: 112px;
  border-radius: 25px;
  display: block;
  margin-bottom: 28px;
  box-shadow: 0 10px 30px rgba(36, 31, 26, 0.18);
}

h1, h2, h3 { font-family: var(--display); line-height: 1.1; margin: 0; }

.hero h1 { font-size: clamp(44px, 9vw, 72px); font-weight: 900; letter-spacing: -0.01em; }

.tagline {
  font-size: clamp(19px, 3.4vw, 23px);
  color: var(--muted);
  margin: 14px 0 0;
  max-width: 36em;
}

.cta {
  display: inline-block;
  margin-top: 30px;
  padding: 13px 22px;
  border-radius: 14px;
  background: var(--hero);
  color: var(--hero-ink);
  font: 600 13px/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.intro {
  background: var(--hero);
  color: var(--hero-ink);
  border-radius: 22px;
  padding: 34px 30px;
  font-size: 19px;
  line-height: 1.55;
  margin: 0 0 56px;
}

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 64px;
}

@media (min-width: 640px) {
  .features { grid-template-columns: 1fr 1fr; }
}

.feature {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 18px;
  padding: 24px 22px 22px;
}

.feature h2 {
  font: 600 12px/1.4 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent, var(--run));
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 9px;
}

.feature h2::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: currentColor;
  flex: none;
  margin-top: 3px;
}

.feature p { margin: 0; color: var(--ink); font-size: 16px; }

.feature.run { --accent: var(--run); }
.feature.walk { --accent: var(--walk); }
.feature.ride { --accent: var(--ride); }
.feature.gold { --accent: var(--gold); }

.feature.wide { grid-column: 1 / -1; }

.requires {
  text-align: center;
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 72px;
}

.doc { padding: 56px 0 72px; }

.doc h1 { font-size: clamp(36px, 7vw, 48px); font-weight: 900; margin-bottom: 8px; }

.doc .meta { color: var(--faint); font: 600 12px/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; margin: 0 0 36px; }

.doc h2 { font-size: 22px; font-weight: 800; margin: 40px 0 10px; }

.doc p, .doc li { color: var(--ink); }

.doc ul { padding-left: 1.2em; }

.doc li { margin: 6px 0; }

.callout {
  background: var(--inset);
  border-left: 4px solid var(--run);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 0 0 8px;
}

.callout p { margin: 0; }

.site-footer { border-top: 1px solid var(--hairline); padding: 28px 0 40px; }

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font: 600 11px/1.6 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

.site-footer a { color: var(--faint); text-decoration: none; }
.site-footer a:hover { color: var(--ink); }
.site-footer nav { display: flex; gap: 18px; }