:root {
  --bg: #0b0f14;
  --bg-elev: #131a22;
  --bg-sunk: #0e141b;
  --line: #24303c;
  --fg: #e6edf3;
  --fg-dim: #8b98a5;
  --accent: #4cc2ff;
  --accent-soft: rgba(76, 194, 255, .12);
  --warn: #f0b849;
  --radius: 12px;
  --maxw: 900px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --bg-elev: #ffffff;
    --bg-sunk: #eef1f5;
    --line: #dde3ea;
    --fg: #16202b;
    --fg-dim: #5d6b7a;
    --accent: #0a6ebd;
    --accent-soft: rgba(10, 110, 189, .09);
    --warn: #9a6a04;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.68 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent); }
a:hover { text-decoration: none; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- nav ---------- */

.nav {
  border-bottom: 1px solid var(--line);
  background: var(--bg-sunk);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 58px;
  flex-wrap: wrap;
}

.nav-brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--fg);
  letter-spacing: -0.01em;
  margin-right: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--fg-dim);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover { color: var(--fg); }
.nav-links a[aria-current="page"] { color: var(--fg); border-bottom-color: var(--accent); }

/* ---------- hero ---------- */

.hero { padding: 56px 0 40px; border-bottom: 1px solid var(--line); }

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.hero .lede {
  margin: 0;
  font-size: 18px;
  color: var(--fg-dim);
  max-width: 60ch;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--fg);
  background: var(--bg-elev);
}

.btn:hover { border-color: var(--accent); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #04121c;
}

.btn-primary:hover { filter: brightness(1.1); }

@media (prefers-color-scheme: light) {
  .btn-primary { color: #ffffff; }
}

/* ---------- sections ---------- */

main { padding: 44px 0 72px; }

section + section { margin-top: 52px; }

h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  scroll-margin-top: 76px;
}

h3 {
  font-size: 16px;
  margin: 28px 0 6px;
  scroll-margin-top: 76px;
}

.sub { color: var(--fg-dim); margin: 0 0 20px; }

p { margin: 0 0 14px; }

ul, ol { padding-left: 22px; }
li { margin: 6px 0; }

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88em;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: 5px;
  white-space: nowrap;
}

/* ---------- feature grid ---------- */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.features li {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin: 0;
}

.features strong { display: block; margin-bottom: 4px; }
.features span { color: var(--fg-dim); font-size: 14px; }

/* ---------- command tables ---------- */

.cmds {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 8px;
  font-size: 15px;
}

.cmds th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--fg-dim);
  font-weight: 600;
  padding: 0 12px 8px 0;
  border-bottom: 1px solid var(--line);
}

.cmds td {
  padding: 11px 12px 11px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.cmds td:first-child { white-space: nowrap; width: 1%; }
.cmds td:last-child { color: var(--fg-dim); padding-right: 0; }

@media (max-width: 620px) {
  .cmds, .cmds tbody, .cmds tr, .cmds td { display: block; width: auto; }
  .cmds thead { display: none; }
  .cmds tr { border-bottom: 1px solid var(--line); padding: 10px 0; }
  .cmds td { border: 0; padding: 2px 0; }
  .cmds td:first-child { white-space: normal; }
}

/* ---------- steps ---------- */

.steps { counter-reset: step; list-style: none; padding: 0; margin: 20px 0 0; }

.steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 44px;
  margin: 0 0 24px;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--accent);
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
}

.steps strong { display: block; margin-bottom: 2px; }

/* ---------- callout ---------- */

.note {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 14px 16px;
  margin: 20px 0;
  font-size: 15px;
}

.note.warn { border-left-color: var(--warn); }
.note :last-child { margin-bottom: 0; }

/* ---------- changelog ---------- */

.rel { border-top: 1px solid var(--line); padding: 26px 0 4px; }
.rel:first-of-type { border-top: 0; padding-top: 8px; }

.rel-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.rel-head h2 { margin: 0; font-size: 19px; }

.rel time {
  font-size: 13px;
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
}

.tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--accent-soft);
  color: var(--accent);
}

.tag-fix { background: rgba(139, 152, 165, .15); color: var(--fg-dim); }

.rel ul { margin: 0; }

/* ---------- legal pages ---------- */

.legal { max-width: 700px; }
.legal h2 { margin-top: 36px; }
.legal .updated { color: var(--fg-dim); font-size: 14px; margin-bottom: 30px; }

.toc {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 0 0 32px;
}

.toc ol { margin: 0; font-size: 15px; }

/* ---------- footer ---------- */

.foot {
  border-top: 1px solid var(--line);
  padding: 26px 0 50px;
  color: var(--fg-dim);
  font-size: 13px;
}

.foot a { color: var(--fg-dim); }
.foot p { margin: 0 0 6px; }

/* ---------- brand mark ---------- */

.nav-brand img { border-radius: 50%; display: block; }

.hero-grid {
  display: flex;
  align-items: flex-start;
  gap: 26px;
}

.hero-logo {
  flex: 0 0 auto;
  width: 140px;
  height: 140px;
  filter: drop-shadow(0 6px 20px rgba(0, 0, 0, .35));
}

@media (max-width: 640px) {
  .hero-grid { flex-direction: column; gap: 18px; }
  .hero-logo { width: 96px; height: 96px; }
}

/* ---------- not-shipped-yet feature ---------- */

.features li.soon { border-style: dashed; }

.features .badge {
  font-size: 10px;
  font-style: normal;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  vertical-align: middle;
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 20px;
  background: var(--accent-soft);
  color: var(--accent);
}