:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --text: #e0e0e0;
  --text-muted: #8892b0;
  --accent: #64ffda;
  --link: #88c0d0;
  --border: #2a2a4a;
  --code-bg: #0f0f23;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  max-width: 48rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header nav a {
  color: var(--accent);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 600;
}

main { margin-top: 2rem; }

h1 { color: #fff; margin-bottom: 0.25rem; }
h2 { color: var(--accent); margin: 2rem 0 0.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
h3 { color: var(--link); margin: 1.5rem 0 0.5rem; }

.subtitle { color: var(--text-muted); margin-bottom: 1.5rem; }

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

/* Index list */
.summary-list { list-style: none; }
.summary-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
}
.summary-list a { font-size: 1.05rem; text-decoration: none; }
.summary-list a:hover { text-decoration: underline; }
.channel, .duration {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Summary article */
.summary img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 0.5rem 0;
}
.summary figure {
  margin: 1rem 0;
}
.summary figcaption {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}
.summary blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  background: var(--surface);
  border-radius: 0 4px 4px 0;
  color: var(--text-muted);
}
.summary table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.summary th, .summary td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
}
.summary th {
  background: var(--surface);
  color: var(--accent);
}
.summary code {
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
}
.summary pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1rem 0;
}
.summary pre code {
  background: none;
  padding: 0;
}
.summary ul, .summary ol {
  margin: 0.5rem 0 0.5rem 1.5rem;
}
.summary li { margin-bottom: 0.3rem; }
.summary hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}
.summary strong { color: #fff; }

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}