/* DKY Learn — Research pages style */
:root {
  --bg: #0d1117; --surface: #161b22; --border: #30363d;
  --fg: #c9d1d9; --fg-muted: #8b949e; --heading: #f0f6fc;
  --accent: #58a6ff; --good: #3fb950; --warn: #d2991d;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', 'PingFang TC', sans-serif;
  background: var(--bg) !important; color: var(--fg); line-height: 1.8;
  margin-left: 240px; padding: 2rem 2.5rem 3rem; max-width: 860px;
}
h1 { font-size: 1.6rem; color: var(--heading); margin-bottom: 0.3rem; }
h2 { font-size: 1.1rem; color: var(--accent); margin: 1.5rem 0 0.5rem; border-left: 3px solid var(--accent); padding-left: 0.6rem; }
h3 { font-size: 0.95rem; color: var(--heading); margin: 1rem 0 0.4rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { color: var(--heading); }
code { background: var(--surface); padding: 0.1rem 0.3rem; border-radius: 3px; font-size: 0.88rem; font-family: 'SFMono', 'Consolas', monospace; }
pre { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 0.8rem 1rem; overflow-x: auto; margin: 0.5rem 0; }
pre code { background: none; padding: 0; }
table { width: 100%; border-collapse: collapse; margin: 0.5rem 0; }
th { background: #1f2937; color: var(--heading); padding: 0.4rem 0.6rem; text-align: left; font-size: 0.85rem; }
td { border-bottom: 1px solid var(--border); padding: 0.4rem 0.6rem; font-size: 0.85rem; }
blockquote { border-left: 3px solid var(--warn); background: rgba(210,153,29,0.08); padding: 0.5rem 1rem; margin: 0.8rem 0; font-size: 0.88rem; }
.meta { color: var(--fg-muted); font-size: 0.82rem; margin-bottom: 1.2rem; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 1.2rem 1.4rem; margin-bottom: 1rem;
}
.card p, .card li { font-size: 0.92rem; margin-bottom: 0.4rem; }
.card ul, .card ol { padding-left: 1.5rem; }
.tag {
  display: inline-block; background: #1f2937; color: var(--accent);
  font-size: 0.75rem; padding: 0.15rem 0.6rem; border-radius: 1rem; margin: 0.15rem;
}
footer { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--border); font-size: 0.82rem; color: var(--fg-muted); }
footer a { color: var(--fg-muted); }
.ad-unit { display: none; }  /* AdSense not on learn.dky.tw */

@media (max-width: 768px) {
  body { margin-left: 0 !important; padding: 1rem; max-width: 100%; }
  h1 { font-size: 1.3rem; }
  .card { padding: 1rem; }
}