:root {
  --bg: #070f1c; --card: #0e1a2e; --text: #e8eef8; --muted: #9aadc6;
  --accent: #3ecfbf; --line: #1c2f4a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
}
main { max-width: 960px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
.crumb { font-size: 0.85rem; margin: 0 0 0.5rem; }
.crumb a { color: var(--accent); }
h1 { font-size: 1.75rem; font-weight: 700; margin: 0 0 0.25rem; letter-spacing: -0.02em; }
.sub { color: var(--muted); font-size: 0.95rem; margin: 0 0 1rem; }
.sub a { color: var(--accent); }
#sketch-holder {
  width: 100%; max-width: 920px; margin: 0 auto 1rem;
  border-radius: 12px; overflow: hidden; border: 1px solid var(--line);
  background: #06101c; box-shadow: 0 12px 40px rgba(0,0,0,0.35);
}
#sketch-holder canvas { display: block; width: 100% !important; height: auto !important; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 1rem 1.15rem; margin: 1rem 0;
}
.card h2 {
  font-size: 0.85rem; margin: 0 0 0.5rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.card p, .card li { color: var(--muted); font-size: 0.95rem; margin: 0; }
.card a { color: var(--accent); }
.keys kbd {
  display: inline-block; padding: 0.1rem 0.45rem; border-radius: 4px;
  background: #1a2d48; border: 1px solid #2a4568; color: var(--text); font-size: 0.85rem;
}
footer { margin-top: 1.5rem; font-size: 0.85rem; color: var(--muted); }
footer a { color: var(--accent); }
.hub-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.85rem; margin: 1.25rem 0 2rem;
}
.hub-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 1rem 1.1rem; transition: border-color 0.15s, transform 0.15s;
}
.hub-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.hub-card h2 { margin: 0 0 0.35rem; font-size: 1.05rem; color: var(--text); }
.hub-card p { margin: 0; font-size: 0.88rem; color: var(--muted); }
.hub-card .tag {
  display: inline-block; margin-top: 0.65rem; font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent);
}