/* contents page of a course (build-site.mjs with a curriculum); colours and font come from style.css */
.home { --wrap: 1120px; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }

.bar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px max(16px, calc((100% - var(--wrap)) / 2 + 16px));
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 15px; }
.brand > span:last-child { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.brand-mark { flex: none; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; background: var(--teal); }
.brand-mark svg { width: 16px; height: 16px; fill: var(--card); }
.bar-link { flex: none; color: var(--teal); font-weight: 800; font-size: 14px; text-decoration: none; }

.hero { max-width: var(--wrap); margin: 0 auto; padding: 40px 16px 28px; }
.hero h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.1; letter-spacing: -0.01em; max-width: 18ch; }
.hero .intro { font-size: 17px; margin-top: 12px; }
.cta { margin-top: 22px; }
.primary {
  display: inline-grid; gap: 2px; max-width: 100%;
  padding: 14px 52px 14px 20px; position: relative;
  border: 2px solid var(--ink); border-radius: var(--radius);
  background: var(--teal); color: var(--card); text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink); transition: transform 0.12s, box-shadow 0.12s;
}
.primary small { font-size: 12px; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.85; }
.primary b { font-size: 17px; line-height: 1.3; }
.primary::after { content: "→"; position: absolute; right: 18px; top: 50%; translate: 0 -50%; font-size: 22px; font-weight: 800; }
.primary:hover, .primary:focus-visible { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink); }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 28px 0 0; }
.stats div { padding: 12px 14px; border: 1.5px solid var(--line); border-radius: var(--radius); background: var(--card); }
.stats dt { color: var(--mute); font-size: 13px; font-weight: 700; }
.stats dd { margin: 2px 0 0; color: var(--mute); font-size: 14px; }
.stats dd b { color: var(--ink); font-size: 26px; font-weight: 800; font-variant-numeric: tabular-nums; margin-right: 4px; }

.course { max-width: var(--wrap); margin: 0 auto; padding: 8px 16px 32px; }
.toc-head h2 { margin: 0; font-size: 26px; font-weight: 800; }
.toc-head p { margin: 4px 0 0; color: var(--mute); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; }
.chip {
  display: inline-flex; align-items: baseline; gap: 8px; padding: 7px 12px;
  border: 1.5px solid var(--line); border-radius: 999px; background: transparent;
  color: var(--mute); text-decoration: none; font-size: 14px;
}
.chip b { font-weight: 800; }
.chip span { font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums; }
.chip.has { border-color: var(--ink); background: var(--card); color: var(--ink); }
.chip.has span { color: var(--teal); }
.chip:hover { border-color: var(--teal); }

.unit { padding: 26px 0 6px; border-top: 1.5px solid var(--line); margin-top: 18px; }
.unit-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.unit-head h2 { margin: 4px 0 0; font-size: clamp(20px, 2.6vw, 26px); line-height: 1.25; font-weight: 800; }
.count { flex: none; display: grid; gap: 6px; justify-items: end; color: var(--mute); font-size: 14px; font-weight: 700; }
.count b { color: var(--ink); font-size: 18px; margin-right: 1px; }
.meter { width: 120px; height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; }
.meter span { display: block; height: 100%; min-width: 0; background: var(--teal); }
.unit.empty .unit-head { margin-bottom: 8px; }
.unit.empty h2 { font-size: clamp(18px, 2.2vw, 22px); color: var(--mute); }

.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.lesson {
  display: grid; grid-template-columns: 92px minmax(0, 1fr) 28px; gap: 14px; align-items: start;
  padding: 16px 18px; border: 2px solid var(--ink); border-radius: var(--radius);
  background: var(--card); color: var(--ink); text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink); transition: transform 0.12s, box-shadow 0.12s;
}
.lesson:hover, .lesson:focus-visible { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink); }
.lesson .num { padding-top: 2px; color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.lesson .body { display: grid; gap: 4px; }
.lesson b { font-size: 18px; line-height: 1.3; }
.lesson small { color: var(--mute); font-size: 14px; line-height: 1.45; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; margin-top: 6px; }
.meta .len { font-weight: 800; font-size: 13px; color: var(--ink); font-variant-numeric: tabular-nums; }
.tag, .state { padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.tag { background: color-mix(in srgb, var(--amber) 28%, var(--card)); color: var(--ink); }
.state[hidden] { display: none; }
.started .state { background: color-mix(in srgb, var(--teal) 16%, var(--card)); color: var(--teal); }
.done .state { background: var(--pos); color: var(--card); }
.lesson .go { align-self: center; justify-self: end; color: var(--teal); font-size: 22px; font-weight: 800; }

.later { margin-top: 12px; }
.later summary { cursor: pointer; width: fit-content; color: var(--mute); font-weight: 700; font-size: 14px; padding: 4px 0; }
.later summary:hover { color: var(--ink); }
.later ol { list-style: none; margin: 8px 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 0 24px; }
.later li { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 8px; padding: 8px 0; border-bottom: 1px dashed var(--line); color: var(--mute); font-size: 14px; line-height: 1.4; }
.later .num { font-size: 12px; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; padding-top: 1px; }

.foot { max-width: var(--wrap); margin: 0 auto; padding: 8px 16px 40px; color: var(--mute); font-size: 13px; }

@media (max-width: 720px) {
  .hero { padding-top: 28px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .unit-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .count { justify-items: start; grid-auto-flow: column; align-items: center; gap: 10px; }
  .lesson { grid-template-columns: minmax(0, 1fr); gap: 6px; padding: 14px 16px; }
  .lesson .go { display: none; }
  .lesson b { font-size: 17px; }
}