@font-face {
  font-family: "Kenney Future";
  src: url("../assets/fonts/Kenney Future.ttf") format("truetype");
  font-display: swap;
}

:root {
  --ink: #1f2a44;
  --muted: #5b6785;
  --line: #dfe5ef;
  --bg: #ffffff;
  --card: #f5f8fc;
  --accent: #2f9e5b;
  --accent-ink: #ffffff;
  --off: #8a94a8;
  --gold: #e5a50a;
  --radius: 12px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); }
body {
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.demo { max-width: 720px; margin: 0 auto; padding: 20px 14px 28px; }

.intro h1 {
  font-family: "Kenney Future", system-ui, sans-serif;
  font-weight: normal;
  font-size: clamp(20px, 4.4vw, 26px);
  line-height: 1.15;
  margin: 0 0 8px;
  letter-spacing: 0.01em;
}
.intro p { margin: 0 0 16px; color: var(--muted); }
.intro strong { color: var(--ink); }

/* ---------- tabs ---------- */
.tabs {
  display: flex; gap: 6px; overflow-x: auto; padding: 2px 2px 10px; margin: 0 -2px 4px;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; gap: 7px;
  font: 600 14px/1 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink); background: var(--card);
  border: 1.5px solid var(--line); border-radius: 999px;
  padding: 8px 13px 8px 8px; cursor: pointer;
  transition: background .15s, border-color .15s, transform .1s;
}
.tab:hover { border-color: #b9c4d6; }
.tab:active { transform: translateY(1px); }
.tab[aria-selected="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.num {
  display: inline-grid; place-items: center;
  width: 22px; height: 22px; border-radius: 50%;
  background: #fff; color: var(--ink);
  font: 13px/1 "Kenney Future", system-ui, sans-serif;
  border: 1.5px solid var(--line);
}
.tab[aria-selected="true"] .num { border-color: transparent; background: var(--gold); color: var(--ink); }

/* ---------- one trick ---------- */
.trick { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 14px 12px; }
.trick[hidden] { display: none; }
.trick-head h2 {
  display: flex; align-items: center; gap: 9px;
  font: normal 20px/1.2 "Kenney Future", system-ui, sans-serif;
  margin: 0 0 4px;
}
.trick-head h2 .num { width: 26px; height: 26px; font-size: 14px; background: var(--gold); border-color: transparent; }
.what { margin: 0 0 12px; color: var(--muted); font-size: 15px; }

.stage {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
  touch-action: manipulation; user-select: none; -webkit-user-select: none;
  -webkit-touch-callout: none; outline: none;
}
.side { margin: 0; min-width: 0; }
.side figcaption { margin: 0 0 5px; line-height: 1; }
.pill {
  display: inline-block; font: 600 12px/1 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  letter-spacing: .04em; text-transform: uppercase;
  padding: 5px 9px; border-radius: 999px;
}
.pill.off { background: #e6eaf1; color: var(--off); }
.pill.on { background: var(--accent); color: var(--accent-ink); }
.stage canvas {
  display: block; width: 100%; height: auto; aspect-ratio: 2 / 1;
  border-radius: 8px; background: #dff6f5;
  image-rendering: pixelated; image-rendering: crisp-edges;
  box-shadow: 0 0 0 1px rgba(31,42,68,.12);
}
.side:last-child canvas { box-shadow: 0 0 0 2px var(--accent); }
.trick.playing .stage { cursor: pointer; }
.trick.playing .stage canvas { box-shadow: 0 0 0 2px var(--gold); }
.stage:focus, .stage:focus-visible { outline: none; }

.caption {
  min-height: 4.5em; margin: 12px 0 10px; font-size: 15px; line-height: 1.5;
  padding: 10px 12px; background: #fff; border-left: 4px solid var(--accent); border-radius: 6px;
}

.controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.btn {
  font: 600 14px/1 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  border-radius: 8px; padding: 10px 14px; cursor: pointer;
  background: #fff; color: var(--ink); border: 1.5px solid var(--line);
  text-decoration: none; display: inline-flex; align-items: center; gap: 6px; min-height: 40px;
}
.btn:hover { border-color: #b9c4d6; }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.06); }
.trick.playing .btn.primary { background: var(--ink); border-color: var(--ink); }
.btn.sound { display: none; }
.trick.playing .btn.sound { display: inline-flex; }
.btn.link { margin-left: auto; border-color: transparent; background: transparent; color: var(--muted); padding-right: 4px; }
.btn:focus-visible, .tab:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

.foot { margin-top: 16px; color: var(--muted); font-size: 13px; }
.foot p { margin: 0 0 6px; }
.foot a { color: inherit; }
kbd { font: 12px/1 ui-monospace, Menlo, monospace; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px; padding: 2px 5px; background: #fff; }

/* ---------- phone: stack the two versions ---------- */
@media (max-width: 560px) {
  .demo { padding: 14px 10px 22px; }
  .trick { padding: 12px 10px 10px; }
  .stage { grid-template-columns: 1fr; gap: 8px; }
  .side figcaption { margin-bottom: 4px; }
  .caption { font-size: 14.5px; min-height: 0; }
  .btn.link { margin-left: 0; }
}

/* ---------- solo embed: just one trick ---------- */
.solo .intro, .solo .tabs, .solo .foot, .solo .solo-link { display: none; }
.solo .demo { padding: 8px; }
.solo .trick { border: 0; background: transparent; padding: 4px 2px; }

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

@media (max-width: 560px) {
  .tabs { flex-wrap: wrap; overflow: visible; }
}