:root {
  color-scheme: dark;

  --bg: #050813;
  --surface: #0f172a;
  --surface-hover: #162032;
  --border: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --blue: #3b82f6;
  --violet: #7c3aed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  background-image: radial-gradient(ellipse at 50% 0%, rgb(59 130 246 / 18%) 0%, transparent 65%);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

a {
  color: #60a5fa;
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: #93c5fd;
  text-decoration: underline;
}

main.page {
  flex: 1;
  width: 100%;
  max-width: 64rem;
  margin: 0 auto;
  padding: 3rem 1rem 2rem;
}

header.hero {
  text-align: center;
  margin-bottom: 2.5rem;
}

header.hero img {
  width: 4.5rem;
  height: 4.5rem;
  margin-bottom: 1rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 6vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--blue);
}

.lead {
  margin: 0 auto;
  max-width: 40rem;
  color: var(--muted);
}

section.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr));
  gap: 1rem;
}

a.card,
article.card {
  display: block;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  color: var(--text);
  transition: border-color 0.15s, background-color 0.15s;
}

a.card:hover,
a.card:focus-visible {
  background: var(--surface-hover);
  border-color: rgb(59 130 246 / 50%);
  text-decoration: none;
  color: var(--text);
}

a.card h2,
article.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

a.card p,
article.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

footer.site-footer a,
footer.site-footer span {
  margin: 0 0.5rem;
  display: inline-block;
}

article.card h2 a {
  color: var(--text);
}

article.card h2 a:hover {
  color: #60a5fa;
  text-decoration: none;
}

article.card ul {
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
  font-size: 0.9rem;
}

.hidden {
  display: none;
}

#message {
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  color: var(--text);
}

nav.links {
  margin-top: 2rem;
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

code {
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
  font-size: 0.9em;
}