:root {
  color-scheme: light dark;

  --bg: #f4f4f6;
  --panel: #ffffff;
  --panel-border: #dcdce1;
  --text: #1d1d1f;
  --text-muted: #6e6e73;
  --accent: #0a84ff;
  --accent-text: #ffffff;
  --control-bg: #f0f0f3;
  --control-hover: #e4e4e9;
  --checker-a: #ffffff;
  --checker-b: #e6e6ea;
  --selection: #0a84ff;
  --guide: #ff375f;
  --danger: #d70015;
  --warning: #b25000;

  --radius: 8px;
  --gap: 12px;
  --panel-width: 280px;
  --layers-width: 240px;
  --toolbar-width: 120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --panel: #2c2c2e;
    --panel-border: #3a3a3c;
    --text: #f5f5f7;
    --text-muted: #98989d;
    --accent: #0a84ff;
    --accent-text: #ffffff;
    --control-bg: #3a3a3c;
    --control-hover: #48484a;
    --checker-a: #2c2c2e;
    --checker-b: #3a3a3c;
    --danger: #ff6961;
    --warning: #ffb340;
  }
}

* { box-sizing: border-box; }

/* Elements styled with display: flex/grid still honor the hidden attribute. */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.4 var(--font);
  display: flex;
  flex-direction: column;
}

h1, h2 { margin: 0; font-weight: 600; }

button, input, select { font: inherit; color: inherit; }

button {
  background: var(--control-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
button:hover { background: var(--control-hover); }
button:focus-visible, input:focus-visible, select:focus-visible, .layer-row:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* Header */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  padding: 8px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
}
.app-header h1 { font-size: 15px; white-space: nowrap; }
.back-link { color: var(--text-muted); text-decoration: none; white-space: nowrap; }
.back-link:hover { color: var(--accent); }
.status {
  flex: 1;
  min-width: 0;
  margin: 0;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.status[data-kind="warning"] { color: var(--warning); }
.status[data-kind="error"] { color: var(--danger); }
.autosave-note { margin: 0; font-size: 12px; color: var(--warning); white-space: nowrap; }
.file-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* Three-column layout */

.app {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: var(--toolbar-width) minmax(0, 1fr) var(--panel-width) var(--layers-width);
  grid-template-rows: minmax(0, 1fr);
  grid-template-areas: "tools stage inspector layers";
  gap: var(--gap);
  padding: var(--gap);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 10px;
  min-width: 0;
}
.panel-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.hint { color: var(--text-muted); margin: 0; }

.toolbar { overflow-y: auto; }
.tool-list { display: flex; flex-direction: column; gap: 6px; }
.tool-button {
  display: flex;
  align-items: center;
  gap: 8px;
  text-align: left;
  padding: 6px 8px;
}
.icon {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.toolbar { grid-area: tools; }
.stage { grid-area: stage; }
.inspector { grid-area: inspector; overflow-y: auto; min-height: 0; }
/* Full-height column: the list scrolls, the title and arrange buttons stay put. */
.layers {
  grid-area: layers;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.layer-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; min-height: 0; flex: 1 1 auto; }
.layer-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 4px 3px 6px;
  border-radius: 6px;
  cursor: pointer;
  border-top: 2px solid transparent;
  border-bottom: 2px solid transparent;
}
.layer-row:hover { background: var(--control-bg); }
.layer-row[aria-selected="true"] { background: var(--accent); color: var(--accent-text); }
.layer-row.is-hidden .layer-name, .layer-row.is-hidden .layer-type { opacity: 0.45; }
.layer-row.dragging { opacity: 0.4; }
.layer-row.drop-above { border-top-color: var(--accent); }
.layer-row.drop-below { border-bottom-color: var(--accent); }
.layer-type { display: flex; flex: none; }
.layer-type .icon { width: 14px; height: 14px; }
.layer-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.layer-rename {
  flex: 1;
  min-width: 0;
  font: inherit;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 1px 4px;
}
.layer-actions { display: flex; flex: none; gap: 1px; }
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  min-width: 22px;
  height: 22px;
  background: none;
  border-color: transparent;
  color: inherit;
}
.icon-button .icon { width: 14px; height: 14px; }
.layer-actions .icon-button { opacity: 0.55; }
.layer-row:hover .icon-button, .layer-actions .icon-button[aria-pressed="true"],
.layer-actions .icon-button:focus-visible { opacity: 1; }
.layer-actions .icon-button[aria-pressed="true"] { background: none; border-color: transparent; color: inherit; }
.layer-order { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.layer-order button { flex: 1; padding: 3px 4px; font-size: 12px; white-space: nowrap; }

/* Inspector */

.inspector-section { margin-bottom: 14px; }
.inspector-section h3 {
  font-size: 12px;
  font-weight: 600;
  margin: 0 0 6px;
}
.field {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.field-label { color: var(--text-muted); }
.field input[type="text"], .field select {
  width: 100%;
  background: var(--control-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 4px 6px;
}
.color-control { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.swatches { display: flex; flex-wrap: wrap; gap: 3px; }
.swatch {
  width: 16px;
  height: 16px;
  padding: 0;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--text) 25%, transparent);
}
.swatch:hover { transform: scale(1.15); }
.swatch.add {
  background: var(--control-bg);
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.field input[type="color"], .color-control input[type="color"] {
  width: 48px;
  height: 26px;
  padding: 0 2px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  background: var(--control-bg);
}
.check.sub { color: var(--text-muted); font-size: 12px; }
.fraction-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.fraction-buttons, .segmented { display: flex; }
.fraction-buttons button, .segmented button {
  flex: 1;
  min-width: 0;
  padding: 3px 0;
  border-radius: 0;
  margin-left: -1px;
}
.fraction-buttons button:first-child, .segmented button:first-child { border-radius: 6px 0 0 6px; margin-left: 0; }
.fraction-buttons button:last-child, .segmented button:last-child { border-radius: 0 6px 6px 0; }
button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  position: relative;
}
.number-row { display: flex; align-items: end; gap: 8px; margin-bottom: 6px; }
.number-field { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.number-field span { color: var(--text-muted); font-size: 11px; }
.number-field input {
  width: 100%;
  background: var(--control-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 4px 6px;
}
.check { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.check:has(input:disabled) { color: var(--text-muted); }
.inspector-actions { display: flex; gap: 6px; }
.selection-count { margin: 0 0 10px; font-weight: 600; }
.hint.small { font-size: 12px; margin: 2px 0 6px; }
.tool-row { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; margin-bottom: 4px; }
.tool-gap { width: 8px; }
.icon-button.tool {
  width: 28px;
  height: 28px;
  border: 1px solid var(--panel-border);
  background: var(--control-bg);
  color: var(--text);
}
.icon-button.tool .icon { width: 18px; height: 18px; stroke-width: 1.6; }
.icon-button.tool[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.range { display: flex; align-items: center; gap: 8px; min-width: 0; }
.range input { flex: 1; min-width: 0; accent-color: var(--accent); }
.range output { width: 40px; flex: none; text-align: right; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.inspector-section > .range { margin-bottom: 6px; }
.stops { display: flex; flex-direction: column; gap: 4px; margin: 4px 0 6px; }
.stop-row { display: flex; align-items: center; gap: 6px; }
.stop-row { align-items: flex-start; }
.stop-row .color-control { flex: 1; }
.stop-row input[type="number"] {
  width: 64px;
  background: var(--control-bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 4px 6px;
}
.button-row { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
.button-row button { font-size: 12px; padding: 3px 8px; }
button:disabled { opacity: 0.45; cursor: default; }
button:disabled:hover { background: var(--control-bg); }
.warning {
  margin: 4px 0 6px;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--warning);
  background: color-mix(in srgb, var(--warning) 12%, transparent);
}
.font-status { margin-top: -2px; }
.font-status.is-missing { color: var(--warning); }
.font-load { margin: 2px 0 8px; }
.font-load button { font-size: 12px; }
.font-load .hint { margin-top: 4px; }
.warning.big {
  margin: 0 0 10px;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--warning) 45%, transparent);
  color: var(--text);
}
.warning.big strong { display: block; margin-bottom: 4px; font-size: 13px; color: var(--warning); }
.warning.big p { margin: 0 0 4px; }
.warning.big p:last-child { margin-bottom: 0; color: var(--text-muted); }
.field .segmented button { font-size: 12px; }
.corner-toggles { display: grid; grid-template-columns: repeat(2, 32px); gap: 4px; }
.corner-toggles button { padding: 2px 0; font-size: 16px; line-height: 1.2; }
button.danger { color: var(--danger); }

/* Canvas */

.stage {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-width: 0;
  min-height: 0;
}

.canvas-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 16px;
  overflow: hidden;
  container-type: size;
  min-height: 55%;
}
.canvas-wrap.drop-target { outline: 2px dashed var(--accent); outline-offset: -6px; }

.checkerboard {
  background-color: var(--checker-a);
  background-image:
    linear-gradient(45deg, var(--checker-b) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-b) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-b) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-b) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

/* Largest square that fits the wrapper. */
.canvas {
  display: block;
  width: min(100cqw, 100cqh);
  height: min(100cqw, 100cqh);
  touch-action: none;
  box-shadow: 0 0 0 1px var(--panel-border);
}

.selection-outline {
  fill: none;
  stroke: var(--selection);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.handle {
  fill: #fff;
  stroke: var(--selection);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}
.resize-nw, .resize-se { cursor: nwse-resize; }
.resize-ne, .resize-sw { cursor: nesw-resize; }
.resize-n, .resize-s { cursor: ns-resize; }
.resize-e, .resize-w { cursor: ew-resize; }
.rotate-handle { cursor: grab; }
.rotate-stem {
  stroke: var(--selection);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.snap-guide {
  stroke: var(--guide);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.overlay-label {
  fill: var(--guide);
  font-family: var(--font);
  font-weight: 600;
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 3px;
  stroke-linejoin: round;
  dominant-baseline: middle;
  pointer-events: none;
}
.grid-overlay line {
  stroke: #fff;
  stroke-opacity: 0.55;
  stroke-width: 1;
  stroke-dasharray: 4 4;
  vector-effect: non-scaling-stroke;
  mix-blend-mode: difference;
}
.grid-overlay, .plate-outline { pointer-events: none; }
.plate-outline {
  fill: none;
  stroke: var(--guide);
  stroke-width: 1;
  stroke-dasharray: 6 4;
  vector-effect: non-scaling-stroke;
}
#artwork [data-id] { cursor: move; }

.canvas-tools {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 12px;
}
.tool-group { display: flex; gap: 4px; flex-wrap: wrap; }
.canvas-tools .icon-button { min-width: 30px; height: 28px; border-color: var(--panel-border); background: var(--control-bg); }
.help-button { margin-left: auto; font-weight: 600; }
.canvas-wrap { position: relative; }
.empty-hint {
  position: absolute;
  inset: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}
.marquee {
  fill: color-mix(in srgb, var(--selection) 12%, transparent);
  stroke: var(--selection);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.icon-grid { pointer-events: none; }
.icon-grid * {
  fill: none;
  stroke: #ff9f0a;
  stroke-opacity: 0.8;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

/* Previews */

.preview-strip:empty { display: none; }
/* The canvas keeps most of the column; previews scroll when space is tight. */
.preview-strip { flex: 0 1 auto; min-height: 0; overflow-y: auto; border-radius: var(--radius); }
.preview-panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 8px 10px;
}
.preview-panel summary {
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.preview-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0;
}
.preview-controls .segmented button { padding: 3px 10px; flex: none; }
.preview-scene {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 16px 24px;
  padding: 14px 16px;
  border-radius: 6px;
  overflow-x: auto;
  --scene-text: #1d1d1f;
  --scene-muted: #6e6e73;
  background: #f5f5f7;
  color: var(--scene-text);
}
.preview-scene[data-bg="dark"] { background: #1e1e1e; --scene-text: #f5f5f7; --scene-muted: #98989d; }
.preview-scene[data-bg="wallpaper"] {
  background: linear-gradient(135deg, #3a1c71 0%, #d76d77 55%, #ffaf7b 100%);
  --scene-text: #ffffff;
  --scene-muted: rgba(255, 255, 255, 0.75);
}
.preview-sizes { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 16px; }
.preview-size { margin: 0; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.preview-size figcaption { font-size: 11px; color: var(--scene-muted); font-variant-numeric: tabular-nums; }
.preview-icon { display: block; }
/* At 1x, show real pixels instead of letting a Retina screen smooth them. */
.preview-scene.is-1x .preview-icon { image-rendering: pixelated; }

.dock-mock {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  padding: 6px 8px 4px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(20px);
}
.preview-scene[data-bg="dark"] .dock-mock { background: rgba(80, 80, 80, 0.45); border-color: rgba(255, 255, 255, 0.12); }
.dock-app { display: flex; flex-direction: column; align-items: center; gap: 2px; width: 64px; }
.dock-placeholder {
  width: 52px;
  height: 52px;
  margin: 6px;
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}
.dock-placeholder.a { background: linear-gradient(#b4ec51, #429321); }
.dock-placeholder.b { background: linear-gradient(#f5f5f5, #c8c8c8); }
.dock-app:not(:has(.dock-dot)) { padding-bottom: 6px; }
.dock-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--scene-text); opacity: 0.8; }

.finder-mock {
  min-width: 260px;
  border-radius: 6px;
  overflow: hidden;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.9);
  color: #1d1d1f;
}
.preview-scene[data-bg="dark"] .finder-mock { background: #2a2a2c; color: #f5f5f7; }
.finder-row { display: flex; align-items: center; gap: 6px; padding: 3px 8px; }
.finder-row:nth-child(even) { background: rgba(0, 0, 0, 0.04); }
.preview-scene[data-bg="dark"] .finder-row:nth-child(even) { background: rgba(255, 255, 255, 0.05); }
.finder-name { flex: 1; }
.finder-kind { color: #8e8e93; }
.finder-placeholder { width: 16px; height: 16px; flex: none; border-radius: 3px; }
.finder-placeholder.folder { background: linear-gradient(#6cc4f5, #3a9ee4); border-radius: 2px 4px 3px 3px; height: 13px; }
.finder-placeholder.doc { background: #fff; border: 1px solid #c7c7cc; border-radius: 1px; width: 12px; margin: 0 2px; }

/* Menu bars are drawn light and dark side by side, whatever the scene background. */
.menubar-mocks { display: flex; flex-direction: column; gap: 8px; min-width: 220px; }
.menubar-mock {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  height: 24px;
  padding: 0 12px;
  border-radius: 6px;
  font-size: 13px;
}
.menubar-mock.light { background: rgba(246, 246, 246, 0.92); color: rgba(0, 0, 0, 0.85); }
.menubar-mock.dark { background: rgba(30, 30, 30, 0.92); color: #ffffff; }
.menubar-icon { display: block; }
.preview-scene.is-1x .menubar-icon { image-rendering: pixelated; }
.menubar-placeholder { width: 16px; height: 12px; border-radius: 3px; background: currentColor; opacity: 0.35; }
.menubar-clock { font-variant-numeric: tabular-nums; }
.menubar-note { margin: 0; font-size: 12px; color: var(--scene-muted); }

/* Dialogs */

dialog {
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 18px 20px;
  background: var(--panel);
  color: var(--text);
  max-width: min(460px, calc(100vw - 32px));
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.35); }
dialog h2 { font-size: 15px; margin-bottom: 6px; }
dialog p { margin: 0 0 12px; }
.png-sizes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 16px; margin-bottom: 14px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }
.shortcuts {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 4px 16px;
  margin: 8px 0 12px;
}
.shortcuts dt { font-weight: 600; font-variant-numeric: tabular-nums; }
.shortcuts dd { margin: 0; color: var(--text-muted); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.primary:hover { background: color-mix(in srgb, var(--accent) 85%, black); }
.command {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  margin-bottom: 14px;
  border-radius: 6px;
  background: var(--control-bg);
}
.command code { flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; font-size: 12px; }

/* Single column on narrow screens */

/* Not enough width for four columns: layers go under the inspector. */
@media (max-width: 1100px) {
  .app {
    grid-template-columns: var(--toolbar-width) minmax(0, 1fr) var(--panel-width);
    grid-template-rows: minmax(0, 3fr) minmax(0, 2fr);
    grid-template-areas:
      "tools stage inspector"
      "tools stage layers";
  }
}

@media (max-width: 800px) {
  /* Let the page scroll instead of squeezing every panel into the viewport. */
  html, body { height: auto; }
  .app {
    flex: none;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: none;
    grid-template-areas: "stage" "tools" "inspector" "layers";
    padding: 16px;
  }
  .tool-list { flex-direction: row; flex-wrap: wrap; }
  .canvas-wrap { flex: none; aspect-ratio: 1; padding: 8px; min-height: 0; }
  .preview-strip { overflow: visible; }
  .app-header { flex-wrap: wrap; }
  .status { order: 3; flex-basis: 100%; }
  .inspector, .layers, .layer-list { flex: none; overflow: visible; max-height: none; }
}