:root {
  color-scheme: dark;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  --bg-0: #030812;
  --bg-1: #071827;
  --card: rgba(5, 16, 31, 0.9);
  --card-border: rgba(112, 162, 205, 0.32);
  --text: #f2f7ff;
  --muted: #9fb4ca;
  --cyan: #36d5ff;
  --amber: #f4d58d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(rgba(54, 213, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(54, 213, 255, 0.03) 1px, transparent 1px),
    radial-gradient(900px 480px at 18% -8%, rgba(54, 213, 255, 0.16), transparent 64%),
    radial-gradient(760px 420px at 88% -12%, rgba(244, 213, 141, 0.12), transparent 70%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0));
  background-size: 28px 28px, 28px 28px, auto, auto, auto;
}

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

a:hover {
  color: #72e2ff;
}

.site-shell {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid rgba(54, 213, 255, 0.18);
  background: rgba(8, 20, 39, 0.76);
  backdrop-filter: blur(8px);
}

.site-nav {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.site-nav nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

main.site-shell {
  padding: 1rem 0 2rem;
}

.card {
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.eyebrow {
  margin: 0 0 0.3rem;
  color: var(--muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.76rem;
  font-weight: 800;
}

.prose h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.65rem, 3vw, 2.2rem);
}

.prose h2 {
  margin: 1.15rem 0 0.5rem;
  font-size: 1.2rem;
}

.prose p,
.prose li {
  color: var(--text);
  line-height: 1.52;
}

.prose .mute {
  color: var(--muted);
}

.prose ul {
  margin: 0.35rem 0 0;
}

.toc-list {
  margin: 0.45rem 0 1rem;
  padding-left: 1.15rem;
}

.toc-list li + li {
  margin-top: 0.25rem;
}

.toc-list a {
  color: var(--amber);
  font-weight: 700;
}

.toc-list a:hover {
  color: #ffe2aa;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.quick-links a {
  border: 1px solid rgba(159, 180, 202, 0.25);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  color: var(--amber);
  font-weight: 700;
}

.quick-links a:hover {
  color: #ffe2aa;
  border-color: rgba(244, 213, 141, 0.4);
}

.split {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.guide-grid {
  margin-top: 1rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.guide-card {
  display: grid;
  gap: 0.4rem;
  border: 1px solid rgba(159, 180, 202, 0.26);
  border-radius: 12px;
  padding: 0.8rem;
  background: rgba(255, 255, 255, 0.03);
}

.guide-card h2 {
  margin: 0;
  font-size: 1rem;
}

.guide-card p,
.guide-card span {
  margin: 0;
  color: var(--muted);
}

.guide-card span {
  color: var(--amber);
  font-weight: 700;
}

.code-block {
  border: 1px solid rgba(159, 180, 202, 0.22);
  border-radius: 10px;
  background: rgba(6, 15, 34, 0.76);
  overflow: auto;
}

.code-block pre {
  margin: 0;
  padding: 0.75rem;
}

.code-block code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.89rem;
  color: #cfe7ff;
}

.note {
  border: 1px solid rgba(244, 213, 141, 0.24);
  background: rgba(244, 213, 141, 0.08);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
}

@media (max-width: 760px) {
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.7rem 0;
  }

  .split,
  .guide-grid {
    grid-template-columns: 1fr;
  }
}