:root {
  --bg: #f6f8fc; --band: #edf1f7; --ink: #17263c; --blue: #405cdf; --teal: #087d73;
  --soft-blue: #e0e7ff; --card: #fff; --grey: #52647c; --border: #d7dfeb; --control-border: #7a8aa2; --ready: #b32f38;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 18px; line-height: 1.45;
}
a { color: var(--blue); }
.wrap { max-width: 1100px; margin: 0 auto; padding: 20px 16px 48px; }
h1 { font-size: clamp(28px, 5vw, 44px); margin: 12px 0 4px; line-height: 1.15; text-wrap: balance; }
.lede { color: var(--grey); margin: 0 0 22px; max-width: 60ch; }
.banner {
  background: var(--soft-blue); color: var(--ink); border-radius: 12px; padding: 10px 22px; display: inline-block;
  font-weight: 700; margin: 0 0 26px;
}

/* episode list */
.episodes { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.ep {
  background: var(--card); border: 2px solid var(--border); border-radius: 18px; padding: 16px 18px;
  display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; align-items: center;
  box-shadow: 0 3px 10px rgba(23, 38, 60, .06);
}
.ep .num {
  grid-row: span 2; width: 56px; height: 56px; border-radius: 50%; background: var(--blue); color: #fff;
  display: grid; place-items: center; font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.ep h2 { margin: 0; font-size: 22px; line-height: 1.2; }
.ep .blurb { margin: 2px 0 0; color: var(--grey); font-size: 16px; }
.ep .links { grid-column: 2; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.btn {
  appearance: none; border: 2px solid var(--control-border); background: var(--card); color: var(--ink);
  font: inherit; font-weight: 700; border-radius: 12px; padding: 9px 18px; cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; gap: 8px; min-height: 48px;
}
.btn.primary, .btn.go { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn:focus-visible { outline: 4px solid var(--blue); outline-offset: 3px; }
.btn[disabled] { opacity: .35; cursor: default; }
.small { font-size: 15px; color: var(--grey); }
footer { margin-top: 34px; }

/* player */
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.top h1 { font-size: clamp(22px, 3.6vw, 32px); margin: 0; }
.stage { position: relative; background: var(--card); border-radius: 18px; overflow: hidden; border: 2px solid var(--border); }
.stage.step-complete { border-color: var(--ready); box-shadow: 0 0 0 1px var(--ready); }
.stage video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; background: var(--bg); }
.overlay {
  position: absolute; inset: 0; display: grid; place-items: center; background: rgba(246, 248, 252, .94);
  text-align: center; padding: 20px;
}
.overlay[hidden] { display: none; }
.overlay .btn { font-size: 26px; padding: 16px 40px; }
.dots { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 6px; }
.dot {
  width: 22px; height: 12px; border-radius: 999px; border: 0; padding: 0; background: var(--border); cursor: pointer;
}
.dot.done { background: var(--teal); }
.dot.now { background: var(--blue); }
.count { font-variant-numeric: tabular-nums; color: var(--grey); margin: 0 0 12px; }
.controls { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.controls .btn { justify-content: center; width: 100%; padding: 8px 10px; font-size: 18px; min-height: 64px; }
.controls .btn.go { background: var(--card); border-color: var(--control-border); color: var(--ink); }
.controls .btn.playback-running { background: var(--ready); border-color: var(--ready); color: #fff; }
.controls .btn.playback-paused { background: #15803d; border-color: #15803d; color: #fff; }
.controls .btn.playback-running .btn-shortcut, .controls .btn.playback-paused .btn-shortcut { color: #fff; }
.btn-stack { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; min-width: 0; line-height: 1.1; }
.controls .btn-shortcut, .overlay .btn-shortcut { font-size: 14px; line-height: 1.1; font-weight: 600; }
.controls .btn-shortcut { color: var(--grey); }
.controls .btn.go .btn-shortcut { color: var(--grey); }
.step-status { min-height: 1.45em; margin: 0 0 12px; color: var(--ready); font-weight: 700; }
.options { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center; margin-top: 16px; }
.options label { display: inline-flex; gap: 10px; align-items: center; cursor: pointer; }
.options input { width: 24px; height: 24px; accent-color: var(--teal); }
@media (max-width: 620px) {
  .step-status { min-height: 2.9em; }
  .controls { grid-template-columns: 1fr 1fr; }
  .ep { grid-template-columns: 1fr; }
  .ep .num { grid-row: auto; width: 44px; height: 44px; font-size: 20px; }
  .ep .links { grid-column: 1; }
}

/* Leave room for the full video and its controls on short tablet screens. */
@media (min-width: 621px) and (max-height: 850px) {
  .player {
    max-width: min(1100px, calc(max(220px, calc(100vh - 280px)) * 16 / 9 + 36px));
    max-width: min(1100px, calc(max(220px, calc(100svh - 280px)) * 16 / 9 + 36px));
    padding-top: 12px;
  }
  .player .top { margin-bottom: 8px; }
  .player .dots { margin: 10px 0 4px; }
  .player .count, .player .step-status { font-size: 15px; margin-bottom: 8px; }
  .player .controls .btn { min-height: 64px; font-size: 18px; }
}