:root {
  color-scheme: dark light;
  --bg: #080d1d;
  --surface: #11182c;
  --surface-strong: #18213a;
  --text: #f7f8ff;
  --muted: #b7bfd3;
  --line: #2d3855;
  --primary: #9188ff;
  --accent: #24c8c3;
  --warning: #ffd08a;
  --focus: #f9d65c;
  --max: 74rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 85% 0%, rgba(36, 200, 195, 0.13), transparent 32rem),
    radial-gradient(circle at 0% 12%, rgba(145, 136, 255, 0.14), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 1.05rem;
  line-height: 1.65;
}

a { color: #b7b1ff; }
a:hover { color: #d8d4ff; }
a:focus-visible, button:focus-visible {
  outline: 0.2rem solid var(--focus);
  outline-offset: 0.2rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 0.7rem;
  background: var(--text);
  color: var(--bg);
}
.skip-link:focus { top: 1rem; }

.site-header,
.site-footer,
main {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand span { color: var(--accent); }

nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.3rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
nav a { font-weight: 650; text-underline-offset: 0.25rem; }

main { padding-block: clamp(2.5rem, 8vw, 5.5rem); }

.hero { max-width: 58rem; }
.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.16; letter-spacing: -0.035em; }
h1 { margin: 0; font-size: clamp(2.4rem, 8vw, 5.4rem); }
h2 { margin-top: 2.5rem; font-size: clamp(1.55rem, 4vw, 2.25rem); }
h3 { margin-top: 1.8rem; font-size: 1.25rem; }
.lede { color: var(--muted); font-size: clamp(1.15rem, 2.6vw, 1.45rem); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.2rem;
}
.card, .notice {
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: linear-gradient(145deg, rgba(24, 33, 58, 0.95), rgba(17, 24, 44, 0.95));
}
.card { padding: 1.4rem; }
.card h2 { margin-top: 0; }
.card p { color: var(--muted); }
.card-link { font-weight: 760; }

.notice {
  margin-block: 1.5rem;
  padding: 1.2rem 1.35rem;
  border-left: 0.35rem solid var(--accent);
}
.notice.warning { border-left-color: var(--warning); }
.notice p:first-child { margin-top: 0; }
.notice p:last-child { margin-bottom: 0; }

.article { max-width: 58rem; }
.article p, .article li { color: #dce1ef; }
.article strong { color: var(--text); }
.article code { color: var(--warning); }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 1.2rem 0 2rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  color: var(--muted);
  background: rgba(17, 24, 44, 0.75);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 1.2rem;
}
th, td { padding: 0.8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--text); }

.site-footer {
  padding-block: 1.5rem 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0 0 0.8rem;
  padding: 0;
  list-style: none;
}
.site-footer p { margin: 0; }

@media (max-width: 48rem) {
  .site-header { align-items: flex-start; flex-direction: column; }
  nav ul { justify-content: flex-start; }
  .grid { grid-template-columns: 1fr; }
  body { font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8ff;
    --surface: #ffffff;
    --surface-strong: #eef1fb;
    --text: #101629;
    --muted: #4d5872;
    --line: #d7dced;
    --primary: #574ccf;
    --accent: #087f7b;
    --warning: #7a4d00;
    --focus: #5d32c6;
  }
  body {
    background:
      radial-gradient(circle at 85% 0%, rgba(36, 200, 195, 0.12), transparent 32rem),
      radial-gradient(circle at 0% 12%, rgba(145, 136, 255, 0.12), transparent 30rem),
      var(--bg);
  }
  .card, .notice { background: rgba(255, 255, 255, 0.92); }
  .article p, .article li { color: #28334c; }
  a { color: #493cbf; }
  a:hover { color: #2d2584; }
}