@font-face {
  font-family: "Fredoka";
  src: url("fonts/Fredoka.ttf") format("truetype");
  font-weight: 300 700;
  font-display: swap;
}

:root {
  --bg: #fbf8f3;
  --card: #ffffff;
  --ink: #2b2236;
  --muted: #6b6475;
  --line: #e7e0d6;
  --off: #8a8f98;
  --on: #e0663a;
  --btn: #2b2236;
  --btn-ink: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17141c;
    --card: #221e29;
    --ink: #f1ecf6;
    --muted: #b1a9bb;
    --line: #3a3443;
    --off: #9aa0aa;
    --on: #ff8a5c;
    --btn: #f1ecf6;
    --btn-ink: #221e29;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 24px 12px 40px; }
h1, h2, .caption, .tag, button, .score { font-family: "Fredoka", system-ui, sans-serif; }
h1 { font-size: clamp(24px, 5vw, 32px); line-height: 1.15; margin: 0 0 8px; font-weight: 600; }
.intro p, .outro p { color: var(--muted); margin: 0 0 20px; }
code { font-size: 0.9em; background: var(--line); padding: 1px 5px; border-radius: 4px; word-break: break-word; }

.trick {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  margin: 0 0 24px;
  scroll-margin-top: 12px;
}
.trick > header { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 12px; }
.num {
  flex: none; width: 32px; height: 32px; border-radius: 50%;
  background: var(--ink); color: var(--card);
  display: grid; place-items: center; font: 600 17px "Fredoka", sans-serif;
}
.trick h2 { margin: 0; font-size: 22px; line-height: 1.2; font-weight: 600; }
.rule { margin: 2px 0 0; color: var(--muted); font-size: 15px; }

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.side { margin: 0; min-width: 0; }
.tag {
  display: inline-block; font-size: 14px; font-weight: 500; padding: 2px 10px;
  border-radius: 999px; margin-bottom: 6px; color: #fff; background: var(--off);
}
.side.with .tag { background: var(--on); }
.stage {
  position: relative; width: 100%; aspect-ratio: 4 / 3;
  border-radius: 12px; overflow: hidden; background: #e8f3fb;
  touch-action: manipulation; -webkit-tap-highlight-color: transparent;
  outline-offset: 2px;
}
.stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.trick.playing .stage { cursor: pointer; box-shadow: 0 0 0 3px var(--on); }
.trick.playing .side:not(.with) .stage { box-shadow: 0 0 0 3px var(--off); }

.answers { display: none; gap: 4px; margin-top: 6px; }
.trick.playing .answers { display: flex; }
.answers button { flex: 1; min-width: 0; padding: 7px 2px; font-size: 14px; }

.bar { height: 4px; background: var(--line); border-radius: 2px; margin: 12px 0 8px; overflow: hidden; }
.bar > div { height: 100%; width: 0; background: var(--ink); border-radius: 2px; }
.trick.playing .bar { visibility: hidden; }

.caption { font-size: 19px; line-height: 1.3; min-height: 2.6em; margin: 0 0 10px; font-weight: 500; }

.controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
button {
  border: 0; border-radius: 999px; padding: 8px 16px; font-size: 16px; font-weight: 500;
  background: var(--btn); color: var(--btn-ink); cursor: pointer; min-height: 40px;
}
button.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--line); }
button:disabled { opacity: 0.4; cursor: default; }
button:focus-visible, .stage:focus-visible, input:focus-visible { outline: 3px solid var(--on); }
.slider { display: none; align-items: center; gap: 8px; flex: 1 1 220px; font: 500 15px "Fredoka", sans-serif; }
.trick.playing .slider { display: flex; }
.slider input { flex: 1; accent-color: var(--on); min-width: 100px; }
.slider output { min-width: 3.2em; text-align: right; }

.why { margin: 12px 0 0; color: var(--muted); font-size: 15px; }

/* Single-demo embed: ?trick=<id>&solo */
body.solo main { padding: 0; max-width: none; }
body.solo .intro, body.solo .outro { display: none; }
body.solo .trick { margin: 0; border: 0; border-radius: 0; }
body.solo .trick:not(.solo-pick) { display: none; }
body.solo { background: var(--card); }

@media (max-width: 480px) {
  main { padding: 16px 8px 32px; }
  .trick { padding: 12px 10px; border-radius: 12px; }
  .pair { gap: 6px; }
  .tag { font-size: 12px; padding: 1px 8px; }
  .trick h2 { font-size: 19px; }
  .caption { font-size: 17px; }
  .answers { flex-direction: column; }
  .answers button { padding: 6px 2px; min-height: 34px; font-size: 13px; }
}