:root {
  --bg: #0f1114;
  --fg: #e8e6e3;
  --muted: #9a9690;
  --line: #2a2e33;
  --accent: #c4a574;
  --card: #171a1f;
  --max: 42rem;
}
* { box-sizing: border-box; }
html { font-size: 18px; }
body {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
header {
  border-bottom: 1px solid var(--line);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: baseline;
  justify-content: space-between;
}
.brand { font-weight: 600; letter-spacing: 0.02em; color: var(--fg); }
nav { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.95rem; }
nav a { color: var(--muted); }
nav a:hover, nav a[aria-current="page"] { color: var(--fg); }
main { max-width: var(--max); margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }
h1 { font-size: 1.85rem; font-weight: 600; line-height: 1.25; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.75rem; font-weight: 600; color: var(--fg); }
p, li { color: var(--muted); }
.lead { font-size: 1.1rem; color: var(--fg); }
.meta { font-size: 0.85rem; color: var(--muted); }
.cards { display: grid; gap: 1rem; margin-top: 1.5rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1rem 1.15rem;
}
.card h3 { margin: 0 0 0.4rem; font-size: 1rem; color: var(--fg); }
.tag {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}
ul.clean { padding-left: 1.1rem; }
.notice {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 0 0.75rem 1rem;
  margin: 1.5rem 0;
}
/* Demo room */
.demo-scene {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1rem 1.15rem;
  margin: 1rem 0;
  opacity: 0.45;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}
.demo-scene.active {
  opacity: 1;
  border-color: var(--accent);
}
.demo-scene.done {
  opacity: 0.85;
}
.demo-scene h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--fg);
}
.demo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.85rem;
}
button.btn {
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--fg);
  padding: 0.45rem 0.85rem;
}
button.btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}
button.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
button.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
button.btn-primary:hover:not(:disabled) {
  filter: brightness(1.08);
  color: var(--bg);
}
button.btn-danger {
  border-color: #8a4a4a;
  color: #e0a0a0;
}
a.btn {
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--fg);
  padding: 0.45rem 0.85rem;
  text-decoration: none;
}
a.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
a.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
a.btn-primary:hover {
  filter: brightness(1.08);
  color: var(--bg);
  text-decoration: none;
}
.demo-out {
  margin-top: 0.75rem;
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
  font-size: 0.8rem;
  white-space: pre-wrap;
  color: var(--muted);
  min-height: 1.2em;
}
.demo-out.ok { color: #8fbc8f; }
.demo-out.bad { color: #e0a0a0; }
.demo-out.warn { color: #d4c4a0; }
pre.file {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.75rem 1rem;
  overflow-x: auto;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}
.demo-log {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.75rem;
  color: var(--muted);
}
.demo-log li {
  border-bottom: 1px solid var(--line);
  padding: 0.35rem 0;
  color: var(--muted);
}
.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0 0.5rem;
  font-size: 0.75rem;
}
.steps span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  color: var(--muted);
}
.steps span.on {
  border-color: var(--accent);
  color: var(--fg);
}
.steps span.done {
  color: #8fbc8f;
  border-color: #3a5a3a;
}