:root {
  --green: #1f883d;
  --green-pressed: #298e46;
  --link: #0969da;
  --ink: #1f2328;
  --body: #59636e;
  --muted: #818b98;
  --canvas: #ffffff;
  --surface: #f6f8fa;
  --border: #d1d9e0;
  --dark: #0d1117;
  --dark-surface: #161b22;
  --dark-border: #30363d;
  --code: #c9d1d9;
  --error: #d1242f;
  --cell-0: #ebedf0;
  --cell-1: #9be9a8;
  --cell-2: #40c463;
  --cell-3: #30a14e;
  --cell-4: #216e39;
  --font: "Mona Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
}

::selection { background: #ddf4ff; color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

a { color: var(--link); }

.nav {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: #000;
  color: #fff;
}

.nav a { color: #fff; text-decoration: none; font-weight: 600; }

.nav-links { display: flex; gap: 20px; align-items: center; }

.menu-button {
  display: none;
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 6px;
  min-height: 32px;
  padding: 8px 12px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}

.hero {
  background: var(--dark);
  color: #fff;
  padding: 96px 24px 80px;
}

.wrap { max-width: 1280px; margin: 0 auto; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 40px;
  align-items: center;
}

h1, h2 { margin: 0; letter-spacing: -0.03em; font-weight: 800; }

h1 { font-size: 64px; line-height: 1; letter-spacing: -0.035em; }

h2 { font-size: 32px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.18; }

.lede {
  margin: 16px 0 0;
  max-width: 38rem;
  color: #8b949e;
  font-size: 20px;
  line-height: 1.5;
}

.section { padding: 64px 24px; }
.band { background: var(--surface); }

.code-panel {
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: 8px;
  padding: 16px;
}

.chips { display: flex; gap: 8px; margin-bottom: 12px; }

.chip, .btn, .btn-secondary {
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.43;
  border-radius: 6px;
  cursor: pointer;
  min-height: 32px;
}

.chip {
  background: transparent;
  color: var(--code);
  border: 1px solid var(--dark-border);
  padding: 8px 12px;
}

.chip[aria-pressed="true"] {
  border-color: var(--link);
  color: #fff;
}

.command-row { display: flex; gap: 12px; align-items: center; }

.code-panel code {
  flex: 1;
  overflow-x: auto;
  color: var(--code);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.54;
  white-space: nowrap;
}

.btn {
  background: var(--green);
  color: #fff;
  border: 0;
  padding: 8px 16px;
}

.btn:active { background: var(--green-pressed); }

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  padding: 7px 16px;
}

.status { min-height: 1.3em; margin: 8px 0 0; color: #8b949e; font-size: 12px; }

.cards {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.card {
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.card h2 { font-size: 20px; font-weight: 600; letter-spacing: -0.006em; }

.steps { margin: 16px 0 0; padding: 0; list-style: none; }

.steps li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
}

.steps code, .pair code {
  font-family: var(--mono);
  font-size: 13px;
}

.spec { width: 100%; border-collapse: collapse; margin-top: 12px; }

.spec th, .spec td, .snaps th, .snaps td {
  text-align: left;
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

.spec th, .snaps th { font-size: 12px; color: var(--body); font-weight: 600; }

label { display: block; font-size: 14px; font-weight: 600; margin: 12px 0 6px; }

input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font: inherit;
  background: var(--canvas);
  color: var(--ink);
}

.form-error { color: var(--error); font-size: 14px; min-height: 1.3em; }

.forms { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.chart {
  width: 100%;
  height: 180px;
  display: block;
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
}

.grid {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-top: 16px;
}

.cell {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--cell-0);
}

.pair-code {
  font-family: var(--mono);
  font-size: 28px;
  letter-spacing: 0.12em;
  margin: 8px 0;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px;
  color: var(--body);
  font-size: 12px;
}

.footer a { display: inline-block; margin-right: 16px; }

.nav-cta {
  background: var(--green);
  color: #fff;
  border-radius: 6px;
  padding: 8px 12px;
}

.lede.dark { color: var(--body); }

.cta-row, .actions { display: flex; justify-content: space-between; gap: 24px; align-items: center; flex-wrap: wrap; }
.actions { justify-content: flex-start; }
.btn, .btn-secondary { text-decoration: none; display: inline-flex; align-items: center; }

.auth-page { min-height: calc(100vh - 72px); background: var(--surface); padding: 48px 16px; }
.auth-card { max-width: 420px; margin: 0 auto; }
.auth-card h1 { font-size: 24px; font-weight: 600; letter-spacing: -0.012em; line-height: 1.25; }
.oauth {
  width: 100%;
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}
.oauth:disabled { cursor: not-allowed; }
.badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--body);
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}
.recovery {
  font-family: var(--mono);
  font-size: 20px;
  letter-spacing: 0.08em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
}
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.metric { border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: var(--canvas); }
.metric span { display: block; color: var(--body); font-size: 12px; font-weight: 600; }
.metric strong { display: block; margin-top: 8px; font-size: 28px; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.legend { display: flex; gap: 16px; font-size: 12px; color: var(--body); margin-top: 8px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; }

@media (max-width: 833px) {
  h1 { font-size: 40px; }
  .hero { padding: 48px 20px; }
  .hero-grid, .cards, .forms { grid-template-columns: 1fr; }
  .menu-button { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #000;
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav { position: sticky; top: 0; z-index: 2; }
}