/* Personal site on GitHub Pages: plain CSS with light and dark themes, no build step. */
:root {
  --background: #f7f8fa;
  --surface: #ffffff;
  --text: #1c2330;
  --muted: #5b6475;
  --border: #dde1e8;
  --accent: #2f5bd3;
  --accent-text: #ffffff;
  --code: #eef1f6;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #11151c;
    --surface: #181e27;
    --text: #e6e9ef;
    --muted: #9aa3b2;
    --border: #2a3240;
    --accent: #7c9cff;
    --accent-text: #0d1220;
    --code: #222a36;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font:
    16px/1.6 system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
}

.intro,
main,
footer {
  width: min(960px, 100% - 32px);
  margin-inline: auto;
}

.intro {
  padding: 64px 0 24px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 4px 0 8px;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
}

h2 {
  margin: 0 0 16px;
  font-size: 1.5rem;
}

h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

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

.links {
  display: flex;
  gap: 16px;
}

section {
  margin: 24px 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.lead {
  max-width: 70ch;
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0;
}

.button {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.demo-account {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin: 0;
}

.demo-account dt {
  color: var(--muted);
  font-size: 0.875rem;
}

.demo-account dd {
  margin: 0;
}

code {
  padding: 2px 6px;
  background: var(--code);
  border-radius: 4px;
  font-family: ui-monospace, 'SFMono-Regular', Consolas, monospace;
}

.note {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cards li {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.cards p {
  margin: 0;
  color: var(--muted);
}

.diagram {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.diagram li {
  display: flex;
  flex: 1 1 180px;
  flex-direction: column;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.diagram li + li::before {
  content: '→';
  margin-bottom: 4px;
  color: var(--accent);
}

.diagram span {
  color: var(--muted);
  font-size: 0.875rem;
}

.practices {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.subheading {
  margin-top: 20px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.875rem;
}

footer {
  padding: 8px 0 48px;
  color: var(--muted);
  font-size: 0.875rem;
}