/* Aesthetic ported from artificial.han.io — pure white, hairline borders,
   tiny Satoshi text, red accent, animated grain. */

@import url("https://api.fontshare.com/v2/css?f[]=satoshi@400,500,700&display=swap");

:root {
  --bg: #fff;
  --text: #1a1a1a;
  --text-muted: #bbb;
  --text-light: #ccc;
  --text-data: #999;
  --border: #eee;
  --border-hover: #000;
  --accent: #c00;
  --accent-hover: #a00;
  --panel-bg: #fff;
  --grain-opacity: 0.08;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  font-family: Satoshi, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  padding: 28px 36px 100px;
  max-width: 980px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  animation: pageEntrance 0.8s ease both;
}

@keyframes pageEntrance {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Animated grain — pure CSS via inline SVG turbulence, no external asset. */
body::after {
  content: "";
  position: fixed;
  inset: -4px;
  pointer-events: none;
  z-index: 9999;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.85'/></svg>");
  background-size: 200px 200px;
  animation: grainDrift 8s linear infinite;
}

@keyframes grainDrift {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(2px, 1px); }
  50%  { transform: translate(0, 2px); }
  75%  { transform: translate(-2px, 1px); }
  100% { transform: translate(0, 0); }
}

/* ─────────── Header ─────────── */
header {
  text-align: center;
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

header h1 {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0;
}

header h1 .scramble {
  display: inline-block;
}

header .subtitle {
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 14px;
}

header .blurb {
  color: var(--text-data);
  max-width: 540px;
  margin: 22px auto 0;
  font-size: 12px;
  line-height: 1.6;
}

header .blurb b { color: var(--text); font-weight: 500; }

/* ─────────── Controls ─────────── */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 20;
  font-size: 10px;
}

.controls label {
  color: var(--text-muted);
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0 4px;
}

.controls label.speed-label {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  padding: 0 8px;
  height: 28px;
}

.controls input[type="text"] {
  font-family: Satoshi, monospace;
  font-size: 10px;
  padding: 0 10px;
  height: 28px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  width: 360px;
  min-width: 0;
  letter-spacing: 0.02em;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.controls input[type="text"]:focus {
  outline: none;
  border-color: var(--border-hover);
}

.controls select {
  font-family: inherit;
  font-size: 10px;
  border: none;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.controls button {
  font-family: inherit;
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0 14px;
  height: 28px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.controls button:hover:not(:disabled) {
  border-color: var(--border-hover);
  color: var(--text);
}

.controls button:disabled { opacity: 0.4; cursor: wait; }

.controls .primary {
  background: #1a1a1a;
  border-color: #1a1a1a;
  color: #fff;
}

.controls .primary:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

#status {
  font-size: 10px;
  letter-spacing: 0.05em;
  color: var(--text-data);
  min-width: 220px;
  text-align: right;
  flex: 1;
  font-variant-numeric: tabular-nums;
}

/* ─────────── Mode toggle ─────────── */
.mode-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
}

.mode-toggle .mode {
  padding: 0 14px;
  height: 28px;
  border: none;
  border-right: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.mode-toggle .mode:last-child { border-right: none; }
.mode-toggle .mode.active { background: #1a1a1a; color: #fff; }
.mode-toggle .mode:hover:not(.active) { color: var(--text); }

/* ─────────── Progress bar ─────────── */
#progress-bar {
  position: sticky;
  top: 48px;
  height: 1px;
  background: var(--border);
  z-index: 19;
  margin-bottom: 24px;
}

#progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.25s ease;
}

/* ─────────── Stage panels (layers mode) ─────────── */
.stage {
  margin: 28px 0;
  padding: 18px 0 4px;
  border-top: 1px solid var(--border);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.stage.visible { opacity: 1; transform: translateY(0); }
.stage:first-of-type { border-top: none; padding-top: 0; }

.stage h3 {
  margin: 0 0 4px 0;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}

.stage h3::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--border);
  transition: background 0.3s;
}

.stage.pending h3::before { background: var(--accent); animation: pulse 1.2s infinite; }
.stage.done h3::before { background: var(--accent); }

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50%      { opacity: 1; }
}

.stage .subtitle {
  color: var(--text-data);
  font-size: 10px;
  margin-bottom: 16px;
}

.stage .grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

/* ─────────── Tiles (channel renders) ─────────── */
.tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: border-color 0.15s ease;
}

.tile:hover { border-color: var(--border-hover); }
.tile.big { padding: 12px; }

.tile canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.tile .cap {
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tile .stat {
  font-size: 9px;
  color: var(--text-light);
  font-variant-numeric: tabular-nums;
}

/* Staggered reveal */
.appear {
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.28s ease, transform 0.28s ease;
}
.appear.shown { opacity: 1; transform: scale(1); }

/* ─────────── Seed & latent (layers mode) ─────────── */
.seed-block {
  font-family: Satoshi, monospace;
  font-size: 10px;
  background: var(--bg);
  padding: 10px 14px;
  border: 1px solid var(--border);
  word-break: break-all;
  user-select: all;
  flex: 1;
  min-height: 1.8em;
  letter-spacing: 0.02em;
  color: var(--text);
}

.latent-strip canvas {
  display: block;
  border: 1px solid var(--border);
  background: var(--bg);
}

/* Arrow separator between stages */
.stage::before {
  content: "↓";
  display: block;
  text-align: center;
  color: var(--text-light);
  font-size: 11px;
  margin: -22px 0 10px 0;
}
.stage:first-of-type::before { content: ""; margin: 0; }

/* ─────────── Stack / video mode ─────────── */
.stack-wrap {
  margin: 56px auto;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  opacity: 0;
  animation: stackFadeIn 0.4s ease forwards;
}

@keyframes stackFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.stack-canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: var(--bg);
  border: 1px solid var(--border);
}

/* Export canvas is native 1080×1080 but displayed at a sensible size.
   The recording captures the full native resolution. */
.stack-canvas.export-canvas {
  width: min(540px, 88vw);
  height: auto;
  aspect-ratio: 1 / 1;
}

.stack-wrap.export-mode { position: relative; }

.export-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  background: var(--accent);
  color: #fff;
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border-radius: 2px;
  animation: pulse 1.4s infinite;
  z-index: 2;
}

.stack-caption {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  min-height: 1.2em;
  font-variant-numeric: tabular-nums;
  transition: color 0.2s;
}

.stack-caption[data-kind="channel"]   { color: var(--text-data); }
.stack-caption[data-kind="composite"] { color: var(--accent); font-weight: 500; }
.stack-caption[data-kind="single"]    { color: var(--accent); font-weight: 500; }
.stack-caption[data-kind="final"]     { color: var(--text); font-weight: 500; letter-spacing: 0.22em; }

.stack-frame-idx {
  font-size: 9px;
  color: var(--text-light);
  letter-spacing: 0.2em;
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}

/* ─────────── Footer ─────────── */
footer {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: var(--text-data);
  font-size: 10px;
  letter-spacing: 0.02em;
  text-align: center;
}

footer code {
  font-family: Satoshi, monospace;
  color: var(--text);
}