:root {
  color-scheme: dark;
  --stage: #0b0b0c;
  --chrome: #121214;
  --raise: #1a1a1d;
  --hover: #232327;
  --line: #232326;
  --text: #ececee;
  --dim: #8d8d96;
  --faint: #56565d;
  --accent: #ff6b3d;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --panel: 316px;
  --bar: 52px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  display: grid;
  grid-template: "bar bar" var(--bar) "viewer panel" 1fr / 1fr var(--panel);
  height: 100dvh;
  overflow: hidden;
  background: var(--stage);
  color: var(--text);
  font: 13px/1.4 var(--sans);
  -webkit-font-smoothing: antialiased;
  user-select: none;
}
button { font: inherit; color: inherit; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Bar ------------------------------------------------------------------------- */

.bar {
  grid-area: bar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px 0 18px;
  background: var(--chrome);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none;
  font: 600 13px/1 var(--mono); letter-spacing: 0.16em;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); display: inline-block; }
.busy .brand .dot { animation: pulse 0.9s ease-in-out infinite alternate; }
@keyframes pulse { from { opacity: 1; } to { opacity: 0.25; box-shadow: none; } }

.actions { display: flex; align-items: center; gap: 4px; }
.icon {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border: 0; border-radius: 10px;
  background: transparent; color: var(--dim);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}
.icon:hover { background: var(--hover); color: var(--text); }
.icon:active { transform: scale(0.94); }
.icon.primary { background: var(--accent); color: #140802; margin-left: 4px; }
.icon.primary:hover { background: #ff825b; }

/* Viewer ---------------------------------------------------------------------- */

.viewer {
  grid-area: viewer;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 45%, #151517 0%, var(--stage) 72%);
  touch-action: none;
}
.viewer canvas { position: absolute; inset: 0; width: 100%; height: 100%; cursor: grab; }
.viewer canvas.grabbing { cursor: grabbing; }

.progress { position: absolute; inset: 0 0 auto; height: 2px; opacity: 0; transition: opacity 0.4s 0.15s; pointer-events: none; }
.progress i { display: block; height: 100%; background: var(--accent); transform-origin: left; transform: scaleX(0); transition: transform 0.12s; }
.busy .progress { opacity: 1; transition-delay: 0s; }

.tag {
  position: absolute; top: 14px; left: 14px;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  border-radius: 8px;
  background: rgb(11 11 12 / 0.62);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--dim);
  font: 500 11px/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  pointer-events: none;
  transition: opacity 0.2s;
}
.tag-after { left: auto; right: 14px; color: var(--text); }
.tag .dot { width: 6px; height: 6px; box-shadow: none; }
.tag.hidden { opacity: 0; }

.split { position: absolute; top: 0; bottom: 0; left: 50%; width: 36px; transform: translateX(-50%); cursor: ew-resize; touch-action: none; }
.split-line { position: absolute; top: 0; bottom: 0; left: 50%; width: 1px; background: rgb(255 255 255 / 0.75); box-shadow: 0 0 6px rgb(0 0 0 / 0.5); }
.split-knob {
  position: absolute; top: 50%; left: 50%;
  display: grid; place-items: center;
  width: 36px; height: 36px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgb(18 18 20 / 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgb(255 255 255 / 0.8);
  color: #fff;
  transition: transform 0.15s;
}
.split-knob svg { width: 18px; height: 18px; }
.split:hover .split-knob, .split.dragging .split-knob { transform: translate(-50%, -50%) scale(1.1); }
.split:focus-visible { outline: none; }
.split:focus-visible .split-knob { box-shadow: 0 0 0 2px var(--accent); }

.dock { position: absolute; bottom: 16px; left: 50%; display: flex; gap: 8px; transform: translateX(-50%); }
.zoom, .seed {
  border-radius: 10px;
  background: rgb(18 18 20 / 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--line);
}
.zoom { display: flex; gap: 2px; padding: 3px; }
.zoom button {
  min-width: 44px; padding: 6px 10px;
  border: 0; border-radius: 7px;
  background: transparent; color: var(--dim);
  font: 500 11px/1 var(--mono);
  cursor: pointer;
}
.zoom button:hover { color: var(--text); }
.zoom button[aria-pressed="true"] { background: var(--hover); color: var(--text); }

.seed {
  display: flex; align-items: center; gap: 8px;
  padding: 0 14px 0 10px;
  border-color: rgb(255 107 61 / 0.5);
  color: var(--text);
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}
.seed svg { width: 19px; height: 19px; color: var(--accent); }
.seed:hover { border-color: var(--accent); background: rgb(255 107 61 / 0.14); }
.seed:active { transform: scale(0.96); }
.seed.spin svg { animation: roll 0.45s cubic-bezier(.3, 1.4, .5, 1); }
.seed.spin span { animation: flash 0.6s ease-out; }
@keyframes roll { from { transform: rotate(-120deg) scale(0.75); } }
@keyframes flash { from { color: var(--accent); } }

.drop {
  position: absolute; inset: 12px;
  display: none; place-items: center;
  border: 1.5px dashed var(--accent);
  border-radius: 18px;
  background: rgb(255 107 61 / 0.06);
  color: var(--accent);
  pointer-events: none;
}
.drop svg { width: 56px; height: 56px; stroke-width: 1.2; }
.dragging .drop { display: grid; }

/* Panel ----------------------------------------------------------------------- */

.panel {
  grid-area: panel;
  display: flex; flex-direction: column;
  min-height: 0;
  background: var(--chrome);
  border-left: 1px solid var(--line);
}
.tabs { display: flex; gap: 2px; margin: 14px 16px 4px; padding: 3px; border-radius: 11px; background: var(--raise); }
.tabs button {
  flex: 1;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  height: 34px;
  border: 0; border-radius: 8px;
  background: transparent; color: var(--dim);
  font-weight: 550;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.tabs button svg { width: 18px; height: 18px; }
.tabs button:hover { color: var(--text); }
.tabs button[aria-selected="true"] { background: var(--hover); color: var(--text); box-shadow: 0 1px 2px rgb(0 0 0 / 0.4); }

.looks { flex: 1; min-height: 0; overflow-y: auto; padding: 0 16px 16px; scrollbar-width: thin; }
.group[hidden] { display: none; }
.row-label { margin: 18px 0 10px; color: var(--dim); font: 600 10.5px/1 var(--sans); letter-spacing: 0.1em; text-transform: uppercase; }
.chips { display: grid; grid-template-columns: repeat(var(--cols, 6), minmax(0, 1fr)); gap: 12px 6px; }
.chip {
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  padding: 0; border: 0; background: none;
  cursor: pointer;
}
.swatch {
  width: 100%; aspect-ratio: 1;
  border-radius: 8px;
  background: #777 center / 72px 72px no-repeat;
  image-rendering: pixelated;
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.07);
  transition: box-shadow 0.15s, transform 0.15s;
}
.chip:hover .swatch { transform: translateY(-1px); box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.25); }
.chip[aria-pressed="true"] .swatch { box-shadow: 0 0 0 2px var(--chrome), 0 0 0 3.5px var(--accent); }
.chip:focus-visible { outline: none; }
.chip:focus-visible .swatch { box-shadow: 0 0 0 2px var(--chrome), 0 0 0 3.5px var(--text); }
.cap { color: var(--faint); font: 500 10.5px/1 var(--mono); transition: color 0.15s; }
.chip:hover .cap { color: var(--dim); }
.chip[aria-pressed="true"] .cap { color: var(--text); }

.credits { display: flex; flex-wrap: wrap; gap: 4px 14px; padding: 12px 16px 14px; border-top: 1px solid var(--line); color: var(--faint); font-size: 11px; }
.credits a { color: var(--dim); text-decoration: none; }
.credits a:hover { color: var(--text); }

.toast {
  position: fixed; left: 50%; bottom: 72px;
  padding: 9px 14px;
  transform: translate(-50%, 12px);
  border-radius: 10px;
  background: var(--raise);
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgb(0 0 0 / 0.5);
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Small screens: the panel becomes a bottom sheet. ------------------------------ */

@media (max-width: 760px) {
  body { grid-template: "bar" var(--bar) "viewer" 1fr "panel" auto / 1fr; }
  .panel { max-height: 46dvh; border-left: 0; border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
  .tabs { margin-top: 12px; }
  .row-label { margin: 14px 0 8px; }
  .credits { display: none; }
  .dock { bottom: 12px; }
}

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