:root {
  --bg: #faf8f4; --fg: #22201c; --muted: #6d675d; --line: #dcd6cb; --card: #ffffff; --accent: #2f6f62; --ai: #7a5b1e;
  --g-work: #2e7d4f; --g-dev: #2f62a8; --g-problem: #b3261e; --g-nico: #7b4bb0;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #171614; --fg: #ece8e1; --muted: #a29b8f; --line: #3a3732; --card: #211f1c; --accent: #79c2b0; --ai: #d6b46a;
    --g-work: #6cc28a; --g-dev: #7aa7e6; --g-problem: #ef7d72; --g-nico: #b99ae6; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, sans-serif; }
a { color: var(--accent); }
.top { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; align-items: baseline; padding: .75rem 1.25rem; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; text-decoration: none; font-size: 1.2rem; }
.top nav a { margin-right: .75rem; }
.notice { margin: 0; color: var(--muted); font-size: .85rem; }
main { max-width: 60rem; margin: 0 auto; padding: 1rem 1.25rem 4rem; }
.ai { display: inline-block; margin-left: .4rem; padding: 0 .35rem; border: 1px solid var(--ai); border-radius: .3rem; color: var(--ai); font-size: .7rem; vertical-align: middle; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin: .5rem 0 1rem; }
.chip { border: 1px solid var(--line); background: var(--card); color: var(--fg); border-radius: 1rem; padding: .15rem .7rem; cursor: pointer; font: inherit; font-size: .85rem; }
.chip[aria-pressed="true"] { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.stage { border-left: 3px solid var(--accent); padding: .25rem 0 .75rem 1rem; margin: 1.5rem 0; }
.stage h2 { margin: 0; font-size: 1.15rem; }
.dates, .meta { color: var(--muted); font-size: .85rem; }
.items { list-style: none; padding: 0; margin: .5rem 0 0; }
.items li { margin: .35rem 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: .5rem; padding: .5rem .75rem; }
.card .title { font-weight: 600; }
.event { color: var(--muted); font-size: .9rem; }
.version { font-weight: 600; }
.gap { margin: 1.5rem 0; padding: .75rem 1rem; border: 1px dashed var(--line); color: var(--muted); font-style: italic; }
.icon { display: inline-block; width: 1.4rem; text-align: center; }
iframe.work { width: 100%; height: 70vh; border: 1px solid var(--line); border-radius: .5rem; background: #fff; }
img.work { max-width: 100%; border-radius: .5rem; }
audio { width: 100%; margin: .5rem 0; }
.text { background: var(--card); border: 1px solid var(--line); border-radius: .5rem; padding: .75rem 1rem; }
.error { color: #b3261e; }

/* Colour groups of the timeline cards (left bar + label) and their legend. */
.card.g-work { border-left: 4px solid var(--g-work); }
.card.g-dev { border-left: 4px solid var(--g-dev); }
.card.g-problem { border-left: 4px solid var(--g-problem); }
.card.g-nico { border-left: 4px solid var(--g-nico); }
.kind { margin-left: .5rem; font-size: .75rem; font-weight: 600; white-space: nowrap; }
.g-work .kind, .swatch.g-work { color: var(--g-work); }
.g-dev .kind, .swatch.g-dev { color: var(--g-dev); }
.g-problem .kind, .swatch.g-problem { color: var(--g-problem); }
.g-nico .kind, .swatch.g-nico { color: var(--g-nico); }
.legend { display: flex; flex-wrap: wrap; gap: .4rem 1rem; margin: .25rem 0 .5rem; font-size: .85rem; }
.swatch::before { content: ""; display: inline-block; width: .7rem; height: .7rem; margin-right: .35rem; border-radius: .15rem; background: currentColor; vertical-align: -.05rem; }