:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --panel: #161a23;
  --panel-2: #1c2231;
  --border: #232838;
  --text: #f4f6fb;
  --accent: #4a8cff;
  --danger: #ff5b5b;
  --hit: 56px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
  touch-action: none;
}

button { font-family: inherit; color: inherit; }

.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.topbar h1 { font-size: 22px; margin: 0; }
.topbar-title { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.topbar-title .model-name { font-size: 12px; opacity: 0.65; letter-spacing: 0.06em; }
.topbar-actions { display: flex; gap: 8px; }
.back {
  width: var(--hit); height: var(--hit);
  display: flex; align-items: center; justify-content: center;
  text-decoration: none; color: var(--text); border-radius: 12px;
  background: var(--panel-2); font-size: 22px;
}

.chip {
  height: var(--hit); padding: 0 18px; border-radius: 12px;
  background: var(--panel-2); border: 1px solid var(--border);
  font-size: 16px; cursor: pointer;
}
.chip.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip.danger { color: var(--danger); }
.chip[aria-pressed="true"] { border-color: var(--accent); background: #1d2a44; }

.stage {
  display: grid;
  grid-template-columns: 96px 1fr 240px;
  gap: 12px;
  padding: 12px;
  height: calc(100% - 64px);
  min-height: 0;
}
@media (max-width: 800px) {
  .stage { grid-template-columns: 80px 1fr 180px; }
  .palette h3 { font-size: 14px; }
}
@media (max-width: 600px) {
  .stage { grid-template-columns: 72px 1fr; }
  .palette { display: none; }
}

.tools, .palette {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 8px;
  overflow-y: auto;
}

.tools { display: flex; flex-direction: column; gap: 6px; align-items: stretch; }
.tool-spacer { flex: 1; }

.tool {
  width: 100%; min-height: var(--hit);
  border: 1px solid transparent; border-radius: 12px;
  background: transparent; color: var(--text);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; padding: 6px 4px;
  cursor: pointer;
}
.tool svg { width: 24px; height: 24px; flex-shrink: 0; }
.tool-label {
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.02em;
  opacity: 0.85;
  user-select: none;
}
.tool[aria-pressed="true"] { background: var(--panel-2); border-color: var(--accent); }
.tool.ghost { opacity: 0.85; }
.tool.ghost .tool-label { opacity: 0.95; }
.tool:active { transform: scale(0.96); }

.canvas-wrap {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  min-height: 0;
  padding: 12px;
}
#canvas {
  display: block;
  background: #ffffff;
  border-radius: 12px;
  max-width: 100%; max-height: calc(100% - 56px);
  width: auto; height: auto;
  aspect-ratio: 1 / 1;
  touch-action: none;
  cursor: crosshair;
}
.guide {
  position: absolute;
  pointer-events: none;
  opacity: 0.18;
  border-radius: 12px;
  max-width: 100%; max-height: calc(100% - 56px);
}
.highlight {
  position: absolute;
  pointer-events: none;
  border-radius: 12px;
  max-width: 100%; max-height: calc(100% - 56px);
  aspect-ratio: 1 / 1;
  background:
    repeating-linear-gradient(45deg,
      rgba(74, 140, 255, 0.55) 0 10px,
      rgba(74, 140, 255, 0.18) 10px 20px);
  -webkit-mask: url("template.png") center / contain no-repeat;
          mask: url("template.png") center / contain no-repeat;
  -webkit-mask-mode: luminance;
          mask-mode: luminance;
  mix-blend-mode: normal;
}
.highlight[hidden] { display: none; }

.size-row { width: 100%; max-width: 600px; padding: 12px 4px 0; }
.size-row label { display: flex; align-items: center; gap: 12px; }
.size-label { width: 50px; font-size: 14px; opacity: 0.7; }
.size-row input[type="range"] { flex: 1; height: 36px; }

.palette { display: flex; flex-direction: column; gap: 10px; }
.palette h3 { margin: 8px 4px 4px; font-size: 14px; opacity: 0.65; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600; }
.swatches { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.swatch {
  width: 100%; aspect-ratio: 1; border-radius: 10px; border: 2px solid transparent;
  cursor: pointer; padding: 0; background: var(--bg);
  position: relative;
}
.swatch[aria-pressed="true"] { border-color: var(--text); transform: scale(1.05); }
#color-picker { width: 100%; height: 44px; border-radius: 10px; border: 1px solid var(--border); background: transparent; }

.stickers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.sticker {
  width: 100%; aspect-ratio: 1; border-radius: 10px; border: 1px solid var(--border);
  background: var(--panel-2); display: flex; align-items: center; justify-content: center; cursor: pointer; padding: 0;
}
.sticker svg { width: 70%; height: 70%; }
.sticker[aria-pressed="true"] { border-color: var(--accent); }

.save-dialog {
  width: min(560px, 92vw);
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
.save-dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
.save-dialog h2 { margin: 0 0 8px; }
.save-dialog p { margin: 0 0 16px; opacity: 0.75; }
.save-dialog input[type="text"] {
  width: 100%; padding: 14px; font-size: 18px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  margin-bottom: 16px;
}
.save-options { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.save-options button {
  flex: 1; min-width: 180px; height: var(--hit);
  border-radius: 12px; border: 1px solid var(--border);
  background: var(--panel-2); font-size: 16px; cursor: pointer;
}
.save-options button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.save-dialog .ghost { background: transparent; border: 1px solid var(--border); color: var(--text); padding: 12px 18px; border-radius: 10px; cursor: pointer; }