/* css/canvas.css */

/* ── Canvas screen overlay ─────────────────────────────────────── */
#canvas-screen {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
#canvas-screen.active {
  opacity: 1;
  pointer-events: auto;
}

#draw-canvas {
  flex: 1;
  width: 100%;
  touch-action: none;
  cursor: crosshair;
}

/* ── Floating UI elements ──────────────────────────────────────── */
.canvas-float {
  position: absolute;
  background: rgba(20, 20, 50, 0.92);
  border: none;
  border-radius: 14px;
  padding: 8px 14px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 210;
}

/* Combined end + peer — top left */
.canvas-header {
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  right: calc(env(safe-area-inset-right, 0px) + 12px);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.25rem 0.875rem;
  cursor: pointer;
}
.canvas-header-arrow {
  color: #f87171;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
}
.canvas-header-name {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
}
.canvas-header-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  flex-shrink: 0;
}
.canvas-header.dimmed .canvas-header-name,
.canvas-header.dimmed .canvas-header-dot { opacity: 0.35; }

/* Undo button — bottom left */
.canvas-undo-btn {
  bottom: calc(env(safe-area-inset-bottom, 0px) + 12px);
  left: calc(env(safe-area-inset-left, 0px) + 12px);
  padding: 10px;
  cursor: pointer;
}
.canvas-undo-btn.disabled { opacity: 0.25; pointer-events: none; }

/* Toolbox — bottom right */
.canvas-toolbox {
  bottom: calc(env(safe-area-inset-bottom, 0px) + 12px);
  right: calc(env(safe-area-inset-right, 0px) + 12px);
  padding: 8px 12px;
}
.canvas-toolbox-collapsed {
  display: flex;
  gap: 10px;
  padding: 4px;
  align-items: center;
  cursor: pointer;
  transition: opacity 0.36s ease;
}
.canvas-toolbox {
  overflow: hidden;
  transition: width 0.2s ease-out, height 0.2s ease-out;
}
.canvas-toolbox-collapsed {
  transition: opacity 0.2s ease;
}
.canvas-toolbox-expanded {
  display: none;
}
.canvas-toolbox.open .canvas-toolbox-collapsed { display: none; }
.canvas-toolbox.open .canvas-toolbox-expanded { display: block; }

.canvas-color-ring {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.canvas-thickness-indicator {
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.35);
}

/* Color row */
.canvas-colors {
  display: flex;
  gap: 5px;
  margin-bottom: 8px;
}
.canvas-color-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
}
.canvas-color-dot.selected { border-color: #fff; }

/* Background color squares */
.canvas-bg-dot {
  border-radius: 4px !important;
}

/* Thickness row / slider */
.canvas-thicknesses {
  display: flex;
  align-items: center;
  justify-content: space-between;
  touch-action: none;
  cursor: pointer;
  padding: 6px 0;
  /* Match width of 4 color dots: 4 * 36px + 3 * 5px gap = 159px */
  min-width: calc(4 * 36px + 3 * 5px);
}
.canvas-thickness-btn {
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  border: none;
}
.canvas-thickness-btn.selected {
  background: #e2e8f0;
  outline: 2px solid rgba(99, 102, 241, 0.5);
}

/* Clear button in expanded toolbox */
.canvas-clear-btn {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  text-align: center;
  padding: 4px 0;
}
.canvas-clear-btn:active { color: rgba(255, 255, 255, 0.7); }

/* Separator line in toolbox */
.canvas-toolbox-sep {
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 6px 0;
}

/* ── Confirm dialog ────────────────────────────────────────────── */
.canvas-dialog-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 220;
}
.canvas-dialog {
  background: rgba(20, 20, 50, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 24px 32px;
  text-align: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.canvas-dialog h3 {
  font-size: 1.1rem;
  color: #eeeeff;
  margin-bottom: 16px;
  font-weight: 500;
}
.canvas-dialog p {
  font-size: 0.85rem;
  color: #8080c0;
  margin-bottom: 18px;
}
.canvas-dialog-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
}
.canvas-dialog-btn {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 10px 24px;
  font-size: 0.9rem;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.08);
  color: #8080c0;
}
.canvas-dialog-btn.danger {
  background: rgba(220, 38, 38, 0.3);
  border-color: rgba(220, 38, 38, 0.4);
  color: #f87171;
}
.canvas-dialog-btn.primary {
  background: rgba(99, 102, 241, 0.2);
  border-color: rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
}