:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1a1a1b;
  --muted: #6b6b70;
  --accent: #ff4500;
  --accent-2: #ff8717;
  --border: #e2e2e6;
  --canvas-bg: #ffffff;
  --shadow: rgba(20, 20, 30, 0.12);
  --ring-track: #e2e2e6;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0b0f;
    --surface: #17171d;
    --text: #f2f2f5;
    --muted: #9a9aa5;
    --accent: #ff5722;
    --accent-2: #ffb703;
    --border: #2a2a33;
    --canvas-bg: #101014;
    --shadow: rgba(0, 0, 0, 0.55);
    --ring-track: #2a2a33;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0b0b0f;
  --surface: #17171d;
  --text: #f2f2f5;
  --muted: #9a9aa5;
  --accent: #ff5722;
  --accent-2: #ffb703;
  --border: #2a2a33;
  --canvas-bg: #101014;
  --shadow: rgba(0, 0, 0, 0.55);
  --ring-track: #2a2a33;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
  transition: background 0.2s ease, color 0.2s ease;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 10px var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-mark {
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), #ff00e5, #00e5ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 18px rgba(255, 69, 0, 0.35);
}

.brand-text h1 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand-text p {
  margin: 0;
  font-size: 0.75rem;
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.presence {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
}

.icon-btn {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: 999px;
  width: 2.2rem;
  height: 2.2rem;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease, background 0.15s ease;
}

.icon-btn:hover {
  transform: scale(1.08);
}

.stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  overflow: auto;
}

.canvas-wrap {
  position: relative;
  display: inline-block;
  border-radius: 14px;
  box-shadow: 0 12px 40px var(--shadow);
}

.canvas-scroll {
  max-width: 90vw;
  max-height: 62vh;
  overflow: auto;
  border-radius: 14px;
  border: 3px solid var(--surface);
  outline: 1px solid var(--border);
  background:
    linear-gradient(45deg, #00000010 25%, transparent 25%, transparent 75%, #00000010 75%),
    linear-gradient(45deg, #00000010 25%, transparent 25%, transparent 75%, #00000010 75%);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
  /* Native single-finger panning stays on; pinch/double-tap zoom is handled by our own JS */
  touch-action: pan-x pan-y;
}

.canvas-stage {
  position: relative;
}

#board {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  cursor: crosshair;
  transform-origin: 0 0;
}

.zoom-controls {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  z-index: 5;
}

.zoom-controls .icon-btn {
  width: 2rem;
  height: 2rem;
  font-size: 1rem;
  background: var(--surface);
  box-shadow: 0 4px 12px var(--shadow);
}

.cooldown-badge {
  position: absolute;
  bottom: -14px;
  right: -14px;
  width: 3.4rem;
  height: 3.4rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 6px 18px var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.55;
  transition: opacity 0.2s ease;
}

.cooldown-badge.active {
  opacity: 1;
}

.cooldown-ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.cooldown-ring-bg {
  fill: none;
  stroke: var(--ring-track);
  stroke-width: 3;
}

.cooldown-ring-fg {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.05s linear;
}

#cooldownText {
  position: relative;
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--text);
}

.palette-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0.9rem 1rem 1.2rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.palette {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.swatch {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 8px;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  padding: 0;
}

.swatch:hover {
  transform: translateY(-2px) scale(1.06);
}

.swatch.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-2), 0 0 14px var(--accent);
  transform: translateY(-2px) scale(1.1);
}

.coords {
  font-size: 0.78rem;
  color: var(--muted);
  min-width: 7.5rem;
  text-align: center;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translate(-50%, 20px);
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.55rem 1rem;
  border-radius: 999px;
  box-shadow: 0 8px 24px var(--shadow);
  font-size: 0.85rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 20;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 600px) {
  .brand-text p { display: none; }
  .stage { padding: 0.75rem; }
  .canvas-scroll { max-height: 55vh; }
  .swatch { width: 1.8rem; height: 1.8rem; }
}