:root {
  color-scheme: light;
  background: #f4f1eb;
  font-family: system-ui, sans-serif;
  --page-background: #f4f1eb;
  --page-glow: rgba(255, 255, 255, 0.94);
  --canvas-empty-color: #f7f5ef;
  --grid-line-color: rgba(15, 23, 42, 0.2);
  --canvas-border: rgba(15, 23, 42, 0.28);
  --canvas-shadow: rgba(15, 23, 42, 0.2);
  --control-color: rgba(15, 23, 42, 0.86);
  --control-background: rgba(255, 255, 255, 0.82);
  --control-border: rgba(15, 23, 42, 0.18);
  --control-hover: rgba(255, 255, 255, 0.98);
  --focus-color: #2563eb;
  --slash-color: #dc2626;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  background: #0b0d10;
  --page-background: #0b0d10;
  --page-glow: rgba(39, 44, 52, 0.24);
  --canvas-empty-color: #181b20;
  --grid-line-color: rgba(255, 255, 255, 0.24);
  --canvas-border: rgba(255, 255, 255, 0.34);
  --canvas-shadow: rgba(0, 0, 0, 0.38);
  --control-color: rgba(255, 255, 255, 0.86);
  --control-background: rgba(18, 21, 25, 0.82);
  --control-border: rgba(255, 255, 255, 0.24);
  --control-hover: rgba(35, 39, 46, 0.9);
  --focus-color: #8bbcff;
  --slash-color: #ff9b9b;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-width: 280px;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background:
    radial-gradient(circle at 50% 45%, var(--page-glow), transparent 54%),
    var(--page-background);
}

.canvas-stage {
  display: grid;
  width: 100%;
  height: 100%;
  padding: clamp(16px, 4vmin, 48px);
  place-items: center;
}

.pixel-canvas {
  display: block;
  width: min(90vw, 90vh, 960px);
  height: min(90vw, 90vh, 960px);
  border: 1px solid var(--canvas-border);
  background: var(--canvas-empty-color);
  box-shadow: 0 24px 70px var(--canvas-shadow);
  image-rendering: pixelated;
  cursor: crosshair;
  touch-action: none;
  user-select: none;
}

.canvas-controls {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  right: max(14px, env(safe-area-inset-right));
  display: flex;
  gap: 8px;
}

.control-button {
  display: grid;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--control-border);
  border-radius: 12px;
  color: var(--control-color);
  background: var(--control-background);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  place-items: center;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.control-button:hover {
  background: var(--control-hover);
}

.control-button:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 3px;
}

.control-button svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.45;
}

.grid-off-slash {
  opacity: 0;
  stroke: var(--slash-color);
  stroke-width: 2.1;
  transition: opacity 120ms ease;
}

.grid-toggle[aria-pressed="true"] .grid-off-slash {
  opacity: 1;
}

.theme-sun,
.theme-moon {
  transition: opacity 120ms ease;
}

.theme-moon {
  opacity: 0;
}

:root[data-theme="dark"] .theme-sun {
  opacity: 0;
}

:root[data-theme="dark"] .theme-moon {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .grid-off-slash,
  .theme-sun,
  .theme-moon {
    transition: none;
  }
}