/* Tokens: names and values from docs/design.md, except the page background, which is white. */
:root {
  color-scheme: light;
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-ink: #1c1917;
  --color-muted: #5f594f;
  --color-border: #e4ded3;
  --color-border-strong: #8c857a;
  --color-accent: #c2410c;
  --color-accent-hover: #9a3412;
  --color-accent-soft: #fdebdd;
  --color-on-accent: #ffffff;
}

/* Cards and code blocks are dark: the same token names with dark values, scoped to them. */
ul.plain li, .card, pre {
  --color-surface: #211e1b;
  --color-ink: #f4f0e9;
  --color-muted: #b9b1a4;
  --color-border: #3b362f;
  --color-accent: #fb923c;
  --color-accent-hover: #fdba74;
  background: var(--color-surface);
  color: var(--color-ink);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font: 1rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--color-accent); text-underline-offset: 0.2em; }
a:hover { color: var(--color-accent-hover); }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }
code, pre { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
code { font-size: 0.9em; overflow-wrap: anywhere; }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  background: var(--color-surface); color: var(--color-ink);
  border: 1px solid var(--color-border-strong); border-radius: 0.5rem; padding: 0.5rem 0.75rem;
}
.skip:focus { top: 1rem; }

.wrap { width: 100%; max-width: 64rem; margin: 0 auto; padding: 0 1rem; }
section { text-align: center; padding: 3.5rem 0; border-top: 1px solid var(--color-border); }
section:first-of-type { border-top: 0; }
h1, h2, h3 { line-height: 1.2; margin: 0; }
h1 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; font-size: clamp(2.25rem, 8vw, 3.5rem); }
h2 { font-size: 1.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.0625rem; margin-bottom: 0.5rem; }
p { margin: 0 auto 1rem; max-width: 42rem; }
.lede { font-size: 1.125rem; color: var(--color-muted); }

header.hero { text-align: center; padding: 4rem 0 3rem; }
.hero p { margin-top: 0.75rem; }

/* Video: a button until clicked, then the nocookie iframe */
.video { aspect-ratio: 16 / 9; width: 100%; max-width: 48rem; margin: 2rem auto 0;
  border: 1px solid var(--color-border); border-radius: 0.75rem; overflow: hidden;
  background: var(--color-surface); }
.video iframe, .video button, .video .soon { width: 100%; height: 100%; border: 0; display: flex; }
.video button, .video .soon {
  flex-direction: column; align-items: center; justify-content: center; gap: 0.75rem;
  background: var(--color-accent-soft); color: var(--color-ink); font: inherit; font-weight: 600;
  padding: 1rem; text-align: center;
}
.video button { cursor: pointer; }
.video button:hover { background: var(--color-surface); }
.video .play { width: 4rem; height: 4rem; border-radius: 50%; background: var(--color-accent);
  color: var(--color-on-accent); display: grid; place-items: center; }
.video .play svg { width: 1.75rem; height: 1.75rem; margin-left: 0.2rem; }
.video .note { font-weight: 400; font-size: 0.875rem; color: var(--color-muted); max-width: 28rem; }

ul.plain { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.75rem; }
ul.plain li { background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 0.75rem; padding: 1rem; }
ul.plain strong { display: block; }
.grid { display: grid; gap: 1rem; }
@media (min-width: 640px) { .grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 640px) { ul.plain.three { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { ul.plain.three { grid-template-columns: 1fr 1fr 1fr; } }

.card { background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 0.75rem; padding: 1.25rem; }
.card p:last-child, .card ul { margin-bottom: 0; }
.card ul { list-style: none; padding: 0; margin: 0; }
.card li { margin-bottom: 0.25rem; }
.card .dt { font-size: 0.8125rem; font-weight: 600; color: var(--color-muted); margin: 0.75rem 0 0.125rem; }
.card .dt:first-of-type { margin-top: 0; }

/* Tabs */
[role="tablist"] { display: flex; justify-content: center; gap: 0.25rem; border-bottom: 1px solid var(--color-border); overflow-x: auto; }
[role="tab"] { font: inherit; font-weight: 600; background: none; color: var(--color-muted);
  border: 0; border-bottom: 3px solid transparent; padding: 0.625rem 1rem; cursor: pointer;
  min-height: 2.75rem; white-space: nowrap; }
[role="tab"][aria-selected="true"] { color: var(--color-ink); border-bottom-color: var(--color-accent); }
[role="tabpanel"] { padding-top: 1rem; }
pre { text-align: left; max-width: 42rem; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 0.75rem;
  padding: 1rem; overflow-x: auto; margin: 0 auto 1rem; font-size: 0.875rem; line-height: 1.5; }
pre:focus-visible { outline-offset: 0; }
.js [role="tabpanel"][hidden] { display: none; }
.tabs-nojs-title { margin: 1rem 0 0.5rem; }
.js .tabs-nojs-title { display: none; }
.tablist-js { display: none; }
.js .tablist-js { display: flex; }

.button { display: inline-block; background: var(--color-accent); color: var(--color-on-accent);
  font-weight: 600; text-decoration: none; padding: 0.75rem 1.25rem; border-radius: 0.5rem; min-height: 2.75rem; }
.button:hover { background: var(--color-accent-hover); color: var(--color-on-accent); }

footer { text-align: center; border-top: 1px solid var(--color-border); padding: 2rem 0 3rem; color: var(--color-muted); }
footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem 1.5rem; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

.notes { list-style: none; padding: 0; margin: 0; }