/* ============================================
   Color Swap Tool — Styles
============================================ */

/* Hero */
.cs-hero {
  position: relative;
  height: 40vh;
  min-height: 280px;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}
.cs-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 40%, rgba(196,168,130,.12) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(100,149,237,.1) 0%, transparent 50%);
}
.cs-hero-content { position: relative; z-index: 1; color: #fff; animation: fadeIn .8s ease both; }
.cs-hero-eyebrow { font-size: var(--text-xs); letter-spacing: .4em; text-transform: uppercase; color: var(--accent); margin-bottom: var(--sp-4); }
.cs-hero-title { font-family: var(--font-serif); font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 300; letter-spacing: .12em; margin-bottom: var(--sp-3); }
.cs-hero-subtitle { font-size: var(--text-sm); color: rgba(255,255,255,.6); letter-spacing: .08em; }

/* Steps */
.cs-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  padding: var(--sp-10) 0 var(--sp-8);
  flex-wrap: wrap;
}
.cs-step {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  background: var(--gray-50);
  border: var(--border);
  border-radius: 40px;
}
.cs-step-num {
  width: 28px; height: 28px;
  background: var(--black);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
}
.cs-step-text { font-size: var(--text-sm); font-weight: 500; letter-spacing: .04em; }
.cs-step-arrow { color: var(--gray-400); font-size: 18px; }

/* Tool Section */
.cs-tool-section { padding: 0 0 var(--sp-24); }

/* Workspace */
.cs-workspace {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--sp-8);
  align-items: start;
}

/* Upload */
.cs-upload-area {
  border: 2px dashed var(--gray-300);
  border-radius: 8px;
  padding: var(--sp-16) var(--sp-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--dur-base) var(--ease);
  background: var(--gray-50);
}
.cs-upload-area:hover, .cs-upload-area.dragover {
  border-color: var(--accent);
  background: rgba(196,168,130,.05);
}
.cs-upload-icon { font-size: 3rem; margin-bottom: var(--sp-4); }
.cs-upload-title { font-size: var(--text-lg); font-weight: 500; margin-bottom: var(--sp-2); }
.cs-upload-hint { font-size: var(--text-xs); color: var(--gray-500); }

/* Canvas */
.cs-canvas-wrap {
  position: relative;
  background: repeating-conic-gradient(#f0f0f0 0% 25%, #fff 0% 50%) 50% / 20px 20px;
  border: var(--border);
  border-radius: 6px;
  overflow: hidden;
  cursor: crosshair;
}
.cs-canvas-wrap canvas {
  display: block;
  width: 100%;
  height: auto;
}
.cs-canvas-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--sp-3) var(--sp-4);
  background: rgba(0,0,0,.7);
  color: #fff;
  font-size: var(--text-xs);
  letter-spacing: .04em;
  text-align: center;
  z-index: 3;
}

/* Overlay Canvas */
.cs-overlay-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}
.cs-canvas-wrap.drawing .cs-overlay-canvas {
  pointer-events: auto;
  cursor: crosshair;
}

/* Toolbar */
.cs-toolbar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  background: var(--gray-50);
  border: var(--border);
  border-radius: 6px;
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}
.cs-toolbar-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--gray-600);
}
.cs-mode-btn {
  padding: 6px 14px;
  font-size: var(--text-xs);
  font-weight: 500;
  border: var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
  background: var(--white);
  letter-spacing: .04em;
}
.cs-mode-btn:hover {
  border-color: var(--gray-600);
  background: var(--gray-100);
}
.cs-mode-btn.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}
.cs-toolbar-sep {
  width: 1px;
  height: 24px;
  background: var(--gray-300);
}

/* Controls */
.cs-controls {
  margin-top: var(--sp-5);
  padding: var(--sp-5);
  background: var(--gray-50);
  border: var(--border);
  border-radius: 6px;
}
.cs-control-group { margin-bottom: var(--sp-5); }
.cs-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
  display: block;
}
.cs-range {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--gray-300);
  border-radius: 2px;
  outline: none;
}
.cs-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  background: var(--black);
  border-radius: 50%;
  cursor: pointer;
}
.cs-hint { font-size: var(--text-xs); color: var(--gray-500); margin-top: var(--sp-2); }
.cs-control-btns { display: flex; gap: var(--sp-3); flex-wrap: wrap; }

/* Pantone Panel */
.cs-pantone-panel {
  position: sticky;
  top: 120px;
  background: var(--white);
  border: var(--border);
  border-radius: 8px;
  padding: var(--sp-6);
  max-height: calc(100vh - 140px);
  overflow-y: auto;
}
.cs-panel-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}

/* Color Preview */
.cs-color-preview-row {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}
.cs-color-swatch {
  width: 48px; height: 48px;
  border-radius: 8px;
  border: var(--border);
  background: var(--gray-200);
  flex-shrink: 0;
  transition: background var(--dur-fast) var(--ease);
}
.cs-color-hex { font-size: var(--text-sm); font-weight: 600; }
.cs-color-rgb { font-size: var(--text-xs); color: var(--gray-500); }

/* Pantone search */
.cs-pantone-search { margin-bottom: var(--sp-4); border-radius: 6px; }

/* Pantone categories */
.cs-pantone-categories {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}
.cs-cat-btn {
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .06em;
  border: var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
  background: var(--white);
}
.cs-cat-btn:hover, .cs-cat-btn.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

/* Pantone grid */
.cs-pantone-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  max-height: 320px;
  overflow-y: auto;
  padding-right: 4px;
}
.cs-pantone-chip {
  aspect-ratio: 1;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  transition: transform var(--dur-fast) var(--ease-spring), box-shadow var(--dur-fast) var(--ease);
  border: 2px solid transparent;
}
.cs-pantone-chip:hover {
  transform: scale(1.15);
  z-index: 2;
  box-shadow: var(--shadow-md);
}
.cs-pantone-chip.selected {
  border-color: var(--black);
  transform: scale(1.1);
  box-shadow: 0 0 0 2px var(--white), 0 0 0 4px var(--black);
}
.cs-pantone-chip::after {
  content: attr(data-name);
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  white-space: nowrap;
  color: var(--gray-600);
  opacity: 0;
  transition: opacity var(--dur-fast);
  pointer-events: none;
}
.cs-pantone-chip:hover::after { opacity: 1; }

/* Apply section */
.cs-apply-section .btn { margin-top: var(--sp-4); }

/* Responsive */
@media (max-width: 1024px) {
  .cs-workspace { grid-template-columns: 1fr; }
  .cs-pantone-panel { position: static; max-height: none; }
}
@media (max-width: 600px) {
  .cs-steps { gap: var(--sp-2); }
  .cs-step { padding: var(--sp-2) var(--sp-3); }
  .cs-step-arrow { display: none; }
  .cs-pantone-grid { grid-template-columns: repeat(6, 1fr); }
}