/* Sample Space — series theme. One pixel is one sample. See docs/THEME.md. */
:root {
  --bg: #d8dad3;
  --surface: #c9ccc3;
  --ink: #121417;
  --muted: #454a50;
  --accent: #ff4d00;
  --accent-ink: #121417;
  --screen: #0e1211;
  --screen-2: #1b211f;
  --phosphor: #8dffa8;
  --screen-ink: #d3e6da;

  --step-small: clamp(0.875rem, 0.85rem + 0.1vw, 0.9375rem);
  --step-body: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
  --step-lead: clamp(1.375rem, 1.15rem + 0.8vw, 2rem);
  --step-head: clamp(2.25rem, 1.4rem + 3.4vw, 4.25rem);
  --step-display: clamp(3rem, 8vw, 8.5rem);

  --m: clamp(16px, 2.5vw, 32px);
  --gap: clamp(120px, 14vw, 200px);
  --p: 8px; /* one pixel of the motif */

  /* stepped "pixel" corners: two steps of --p on every corner */
  --px-cut: polygon(
    0 calc(var(--p) * 2), var(--p) calc(var(--p) * 2), var(--p) var(--p), calc(var(--p) * 2) var(--p), calc(var(--p) * 2) 0,
    calc(100% - var(--p) * 2) 0, calc(100% - var(--p) * 2) var(--p), calc(100% - var(--p)) var(--p), calc(100% - var(--p)) calc(var(--p) * 2), 100% calc(var(--p) * 2),
    100% calc(100% - var(--p) * 2), calc(100% - var(--p)) calc(100% - var(--p) * 2), calc(100% - var(--p)) calc(100% - var(--p)), calc(100% - var(--p) * 2) calc(100% - var(--p)), calc(100% - var(--p) * 2) 100%,
    calc(var(--p) * 2) 100%, calc(var(--p) * 2) calc(100% - var(--p)), var(--p) calc(100% - var(--p)), var(--p) calc(100% - var(--p) * 2), 0 calc(100% - var(--p) * 2));
  /* folder tab: rises in three pixel steps on each side */
  --px-tab: polygon(0 100%, 0 66%, 8% 66%, 8% 33%, 16% 33%, 16% 0, 84% 0, 84% 33%, 92% 33%, 92% 66%, 100% 66%, 100% 100%);
  /* top corners only, for buttons and folders */
  --px-top: polygon(0 100%, 0 calc(var(--p) * 2), var(--p) calc(var(--p) * 2), var(--p) var(--p), calc(var(--p) * 2) var(--p), calc(var(--p) * 2) 0,
    calc(100% - var(--p) * 2) 0, calc(100% - var(--p) * 2) var(--p), calc(100% - var(--p)) var(--p), calc(100% - var(--p)) calc(var(--p) * 2), 100% calc(var(--p) * 2), 100% 100%);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: var(--step-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg, canvas { display: block; max-width: 100%; }
h1, h2, h3 { font-weight: 500; letter-spacing: -0.03em; line-height: 1.02; margin: 0; text-wrap: balance; }
h2 { font-size: var(--step-head); }
h3 { font-size: var(--step-lead); letter-spacing: -0.02em; line-height: 1.15; }
p { margin: 0 0 1em; max-width: 60ch; }
a { color: inherit; text-underline-offset: 0.18em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
::selection { background: var(--accent); color: var(--accent-ink); }
.num { font-variant-numeric: tabular-nums; }
.wrap { padding-inline: var(--m); }

/* the one button: a flat signal-orange block with pixel corners */
.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font: inherit; font-weight: 500; font-size: var(--step-body);
  color: var(--accent-ink); background: var(--accent);
  border: 0; padding: 0.8em 1.4em; cursor: pointer; text-decoration: none;
  clip-path: var(--px-cut);
  transition: transform 160ms ease, background-color 160ms ease;
}
.btn:hover { background: #ff6a29; }
.btn:active { transform: translateY(2px); }
.btn.quiet { background: var(--screen-2); color: var(--screen-ink); }
.btn.quiet:hover { background: #2a322f; }
.btn.quiet[aria-pressed="true"] { background: var(--phosphor); color: var(--screen); }

/* screens: every demo lives on one */
.screen { background: var(--screen); color: var(--screen-ink); clip-path: var(--px-cut); }
.screen canvas { width: 100%; height: auto; image-rendering: pixelated; }
.readout { font-variant-numeric: tabular-nums; color: var(--screen-ink); font-size: var(--step-small); }
.controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.controls label { display: flex; align-items: center; gap: 10px; font-size: var(--step-small); }
input[type="range"] { accent-color: var(--accent); width: min(260px, 60vw); }

/* pixel sprites */
.sprite { shape-rendering: crispEdges; flex: none; }

/* entrances: content is visible unless the script opts in */
.js .rise { opacity: 0; transform: translateY(24px); transition: opacity 600ms ease, transform 600ms cubic-bezier(.2,.7,.2,1); }
.js .rise.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .rise { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0ms !important; animation: none !important; }
}