:root {
  --bg: #0b1020;
  --bg2: #1b2340;
  --text: #f4f6fb;
  --muted: #9aa4bf;
  --accent: #ffb84c;
  --on-accent: #1b1306;
  --panel: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fc;
    --bg2: #eef1f8;
    --text: #141a2e;
    --muted: #55607a;
    --accent: #b86e00;
    --on-accent: #ffffff;
    --panel: rgba(20, 26, 46, 0.04);
    --border: rgba(20, 26, 46, 0.12);
  }
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  color: var(--text);
  font: 17px/1.6 Inter, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 48px;
}

.wordmark {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.wordmark span {
  color: var(--accent);
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
}

nav a:hover {
  color: var(--text);
}

h1 {
  font-size: clamp(32px, 7vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

h2 {
  font-size: 22px;
  margin: 40px 0 8px;
}

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

.lead {
  font-size: 20px;
  color: var(--muted);
  margin: 0 0 32px;
}

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

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

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 999px;
  text-decoration: none;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 40px 0;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

code {
  font-size: 0.9em;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  word-break: break-all;
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

footer .yt-note {
  color: var(--muted);
  margin: 0 0 12px;
}