/* Custom Styles for TutorMark */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css');

:root {
  --font-sans: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui,
    'Malgun Gothic', 'Apple SD Gothic Neo', Roboto, sans-serif;
}

body {
  font-family: var(--font-sans);
  background-color: #f8fafc;
  color: #1e293b;
  -webkit-tap-highlight-color: transparent;
}

/* Custom scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Glassmorphism effects */
.glass-panel {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(226, 232, 240, 0.8);
}

.glass-dark {
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(51, 65, 85, 0.6);
}

/* Canvas container & cursor styling */
.canvas-wrapper {
  position: relative;
  overflow: hidden;
  background-color: #0f172a;
  background-image: 
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.08) 1px, transparent 0);
  background-size: 24px 24px;
  user-select: none;
  touch-action: none;
}

.canvas-wrapper.cursor-draw {
  cursor: crosshair;
}

.canvas-wrapper.cursor-text {
  cursor: text;
}

.canvas-wrapper.cursor-pan {
  cursor: grab;
}

.canvas-wrapper.cursor-pan:active {
  cursor: grabbing;
}

.canvas-wrapper.cursor-eraser {
  cursor: cell;
}

/* Tool button active animation */
.tool-btn {
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

.tool-btn:hover {
  transform: translateY(-1px);
}

.tool-btn.active {
  background-color: #3b82f6 !important;
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

/* Color picker swatch (markup uses .canvas-color-swatch) */
.color-swatch,
.canvas-color-swatch {
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.color-swatch:hover,
.canvas-color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch.active,
.canvas-color-swatch.active {
  transform: scale(1.2);
  outline: 2px solid #ffffff;
  box-shadow: 0 0 0 3px #3b82f6;
}

/* The tool palette sits over the canvas: never let it swallow a drawing stroke */
.canvas-wrapper canvas {
  touch-action: none;
}

/* Image zoom & modal transitions */
.fade-in {
  animation: fadeIn 0.2s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1); }
}

/* Inline text input overlay on canvas */
.canvas-text-overlay {
  position: absolute;
  min-width: 120px;
  max-width: 400px;
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid #3b82f6;
  border-radius: 6px;
  padding: 6px 10px;
  font-family: var(--font-sans);
  font-weight: 600;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  outline: none;
  z-index: 50;
  white-space: pre-wrap;
  cursor: text;
}

/* contentEditable has no native placeholder support */
.canvas-text-overlay:empty::before {
  content: attr(data-placeholder);
  color: #94a3b8;
  font-weight: 500;
  pointer-events: none;
}

/* Mobile camera upload button pulse */
.pulse-subtle {
  animation: pulseGlow 2.5s infinite;
}

@keyframes pulseGlow {
  0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
  70% { box-shadow: 0 0 0 14px rgba(59, 130, 246, 0); }
  100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}