:root {
  color-scheme: light dark;
  --bg: #0b1220;
  --fg: #e7eefc;
  --muted: #a7b3c9;
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #7dd3fc;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
  background: radial-gradient(1200px 600px at 20% 0%, #132043, var(--bg));
  color: var(--fg);
}

.container {
  width: min(100% - 2rem, 960px);
  margin-inline: auto;
}

.site-header {
  padding: 3rem 0 1.5rem;
}

.site-title {
  margin: 0;
  letter-spacing: -0.02em;
}

.site-tagline {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.card {
  padding: 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  backdrop-filter: blur(8px);
}

button {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(125, 211, 252, 0.12);
  color: var(--fg);
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
  cursor: pointer;
}

button:hover {
  border-color: rgba(125, 211, 252, 0.45);
}

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

a:hover {
  text-decoration: underline;
}

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

.site-footer {
  padding: 2rem 0 3rem;
  color: var(--muted);
}

.prose {
  max-width: 70ch;
}

.prose h3 {
  margin-top: 1.25rem;
}

.prose h4 {
  margin-top: 1rem;
}

.prose p {
  margin: 0.75rem 0;
}

.prose ul {
  padding-left: 1.2rem;
  margin: 0.5rem 0 0.75rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}