@font-face {
  font-family: "Pixelify Sans";
  src: url("assets/fonts/PixelifySans.ttf") format("truetype");
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --bg: #0e0f1c;
  --card: #171a2e;
  --line: #2a2e4a;
  --text: #ece8f6;
  --muted: #a7a3c2;
  --torch: #ffb347;
  --torch-deep: #e2742a;
  --pixel: "Pixelify Sans", ui-monospace, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 var(--sans);
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 32px;
}

.intro h1 {
  font: 600 1.6rem/1.2 var(--pixel);
  margin: 0 0 8px;
  color: var(--torch);
}
.intro p { margin: 0 0 20px; color: var(--muted); }

.demo {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 14px 12px;
  margin: 0 0 20px;
  scroll-margin-top: 12px;
}

.demo h2 {
  font: 600 1.25rem/1.2 var(--pixel);
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.demo h2 .num {
  color: var(--bg);
  background: var(--torch);
  border-radius: 4px;
  padding: 0 6px;
  font-size: 1rem;
}
.demo .lede { margin: 4px 0 10px; color: var(--muted); font-size: 0.95rem; }

.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.panel { margin: 0; min-width: 0; }
.panel .tag {
  display: block;
  font: 600 0.8rem/1 var(--pixel);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 5px;
  color: var(--muted);
}
.panel.on .tag { color: var(--torch); }
.panel canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  border-radius: 6px;
  background: #05060c;
  image-rendering: pixelated;
  outline: 1px solid var(--line);
}
.panel.on canvas { outline-color: #5b4630; }

.demo.walking .panel canvas { cursor: crosshair; touch-action: none; }

.progress {
  height: 3px;
  background: var(--line);
  border-radius: 2px;
  margin: 10px 0 0;
  overflow: hidden;
}
.progress i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--torch-deep);
}
.demo.walking .progress { visibility: hidden; }

.caption {
  margin: 8px 0 10px;
  min-height: 4.5em;
  font-size: 0.95rem;
}
.caption b { color: var(--torch); font-weight: 600; }

.controls { display: flex; flex-wrap: wrap; gap: 8px; }

button {
  font: 600 0.9rem/1 var(--sans);
  color: var(--text);
  background: #262a47;
  border: 1px solid #3a3f66;
  border-radius: 6px;
  padding: 9px 13px;
  min-height: 38px;
  cursor: pointer;
}
button:hover { background: #30355a; }
button:focus-visible { outline: 2px solid var(--torch); outline-offset: 2px; }
.panels:focus-visible { outline: 1px dashed var(--torch); outline-offset: 3px; }
button[aria-pressed="true"] { background: var(--torch); border-color: var(--torch); color: #1a1208; }

.seg { display: inline-flex; }
.seg button { border-radius: 0; }
.seg button:first-child { border-radius: 6px 0 0 6px; }
.seg button:last-child { border-radius: 0 6px 6px 0; border-left: 0; }

.credits { color: var(--muted); font-size: 0.8rem; margin-top: 8px; }
.credits a { color: var(--torch); }

/* Phones: two pictures side by side get too small, so stack them. */
@media (max-width: 520px) {
  .page { padding: 14px 10px 24px; }
  .intro h1 { font-size: 1.35rem; }
  .demo { padding: 12px 10px 10px; }
  .panels { grid-template-columns: 1fr; gap: 10px; }
  .caption { min-height: 6em; }
}

/* ?trick=<id>&solo : one demo, no page chrome, for embedding. */
body.solo { background: var(--card); }
body.solo .page { padding: 0; max-width: none; }
body.solo .intro, body.solo .credits { display: none; }
body.solo .demo { border: 0; border-radius: 0; margin: 0; }