:root {
  color-scheme: dark;
  --bg: #020617;
  --panel: rgba(15, 23, 42, 0.92);
  --panel-border: rgba(148, 163, 184, 0.18);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.16);
  --shadow: 0 24px 60px rgba(2, 6, 23, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(30, 41, 59, 0.95) 0%, #020617 48%, #000 100%);
  color: var(--text);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

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

body {
  line-height: 1.65;
}

.page-shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.site-header,
.site-footer,
.content-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.site-header,
.site-footer {
  padding: 20px 22px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}

.brand img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.brand-title {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav a,
.inline-link-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.7);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.nav a:hover,
.inline-link-list a:hover {
  border-color: rgba(56, 189, 248, 0.45);
  background: var(--accent-soft);
}

.content-card {
  padding: 28px 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

h1,
h2,
h3 {
  letter-spacing: -0.02em;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.08;
}

h2 {
  margin: 28px 0 10px;
  font-size: 1.2rem;
}

p,
li {
  color: var(--text);
}

.lede {
  margin: 0 0 22px;
  max-width: 70ch;
  color: #cbd5e1;
  font-size: 1.02rem;
}

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

.callout,
.grid-card {
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(15, 23, 42, 0.74);
  border-radius: 20px;
}

.callout {
  padding: 16px 18px;
  margin: 18px 0 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.grid-card {
  padding: 16px 18px;
}

.grid-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.inline-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.site-footer {
  margin-top: 20px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
}

.mono {
  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Consolas,
    monospace;
}

.error-hero {
  min-height: 48vh;
  display: grid;
  place-items: center;
}

.error-code {
  margin: 0;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 960px);
    padding: 20px 0 40px;
  }

  .site-header,
  .site-footer,
  .content-card {
    border-radius: 20px;
  }

  .site-header,
  .site-footer,
  .content-card {
    padding: 20px 18px;
  }
}