/* Canvas theme presets: the ground under the ink, and the popover that picks it.
 *
 * --canvas-ground is a content colour, like the user's ink, not a chrome token:
 * the chrome around it stays on tokens.css, light or dark, and each preset
 * names which of the two it pairs with (static/js/canvas-theme.js). The ids and
 * grounds here must match that file.
 */

html[data-canvas="graphite"]   { --canvas-ground: #06090F; }
html[data-canvas="paper"]      { --canvas-ground: #FBFBF9; }
html[data-canvas="chalkboard"] { --canvas-ground: #1E2B24; }
html[data-canvas="blueprint"]  { --canvas-ground: #0E2A47; }
html[data-canvas="midnight"]   { --canvas-ground: #0D1321; }
html[data-canvas="cream"]      { --canvas-ground: #F5EEDC; }
html[data-canvas="whiteboard"] { --canvas-ground: #FFFFFF; }
html[data-canvas="contrast"]   { --canvas-ground: #000000; }

/* This file loads after write.css. `html[data-canvas] .workspace-stage` is
   (0,2,1), which out-ranks both `.workspace-stage` and
   `[data-theme="light"] .workspace-stage` there, so the ground wins without
   editing the older rules. */
html[data-canvas] .workspace-stage {
  background: var(--canvas-ground);
}

/* ---------- the popover ---------- */

.canvas-theme-pop {
  position: fixed;
  z-index: 10001;
  box-sizing: border-box;
  width: min(344px, calc(100vw - var(--s6)));
  max-height: calc(100vh - var(--s7));
  overflow-y: auto;
  padding: var(--s3);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  background: var(--surface);
  box-shadow: 0 12px 32px var(--d-4);
  color: var(--ink);
  font-family: var(--sans);
}

/* The class sets display through its children's layout; say it plainly. */
.canvas-theme-pop[hidden] {
  display: none;
}

.canvas-theme-heading {
  margin: 0 0 var(--s2);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: var(--t-1);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.canvas-theme-grid,
.canvas-pattern-row {
  display: grid;
  gap: var(--s2);
}

.canvas-theme-grid {
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: var(--s4);
}

.canvas-pattern-row {
  grid-template-columns: repeat(3, 1fr);
}

.canvas-theme-tile,
#canvasThemePop .pattern-option {
  box-sizing: border-box;
  width: auto;
  min-height: var(--tap);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  /* Top-aligned so every swatch in a row lines up even when one label, like
     "High contrast", wraps to a second line. */
  justify-content: flex-start;
  gap: var(--s1);
  padding: var(--s1);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-size: var(--t-1);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color var(--fast) ease-out;
}

.canvas-theme-tile:hover,
#canvasThemePop .pattern-option:hover {
  background: var(--raised);
  color: var(--ink);
}

.canvas-theme-tile[aria-checked="true"],
#canvasThemePop .pattern-option[aria-checked="true"] {
  border-color: var(--accent);
  background: var(--accent-wash);
  color: var(--ink);
}

.canvas-theme-tile:focus-visible,
#canvasThemePop .pattern-option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.canvas-theme-swatch {
  display: block;
  height: 34px;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--r-sm);
  background-color: var(--swatch-ground);
  background-image:
    linear-gradient(var(--swatch-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--swatch-grid) 1px, transparent 1px);
  background-size: 8px 8px;
}

.canvas-theme-swatch svg {
  display: block;
  width: 100%;
  height: 100%;
}

.canvas-pattern-swatch {
  align-self: center;
  width: 36px;
  height: 22px;
  border: 1px solid var(--rule);
  border-radius: var(--r-sm);
  background-color: var(--canvas-ground, var(--paper));
}

.canvas-pattern-swatch.is-dot {
  background-image: radial-gradient(var(--ink-3) 1px, transparent 1.3px);
  background-size: 6px 6px;
}

.canvas-pattern-swatch.is-lines {
  background-image: linear-gradient(to bottom, var(--ink-3) 1px, transparent 1px);
  background-size: 100% 6px;
}

.canvas-pattern-swatch.is-graph {
  background-image:
    linear-gradient(var(--ink-3) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink-3) 1px, transparent 1px);
  background-size: 6px 6px;
}

.canvas-pattern-swatch.is-plain {
  background-image: none;
}

.canvas-pattern-swatch.is-inky {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M3 6h6M6 3v6M15 18h6M18 15v6' fill='none' stroke='%23888a9b' stroke-linecap='round'/%3E%3Cg fill='%23888a9b'%3E%3Ccircle cx='18' cy='6' r='1'/%3E%3Ccircle cx='6' cy='18' r='1'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 24px 24px;
}

@media (prefers-reduced-motion: reduce) {
  .canvas-theme-tile,
  #canvasThemePop .pattern-option {
    transition: none;
  }
}