/* Global Settings */
.color-mixer-container,
.color-mixer-container *,
.color-mixer-container *::before,
.color-mixer-container *::after {
  box-sizing: border-box;
}

/* Variables (Light Mode) */
.color-mixer-container {
  --bg-primary: #f5f5f0;
  --bg-secondary: #fff;
  --bg-section: #fff;
  --border-color: #333;
  --text-primary: #222;
  --text-secondary: #555;
  --text-light: #666;
  
  /* Colors */
  --color-accent: #3498db;
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-purple: #9b59b6;
  --color-teal: #1abc9c;
  
  /* Design tokens */
  --shadow-sm: 2px 2px 0 rgba(0,0,0,0.1);
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.15);
  --shadow-lg: 8px 8px 0 rgba(0,0,0,0.15);
  
  --radius-container: 8px;
  --radius-section: 6px;
  --radius-button: 4px;
  --radius-input: 4px;
  
  --input-focus-bg: #fffacd;
  --copy-btn-bg: #fff;
  --copy-btn-hover-bg: #f0f0f0;
}

/* Dark Mode */
.color-mixer-container.dark {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-section: #2d2d2d;
  --border-color: #e0e0e0;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-light: #909090;
  
  --color-accent: #5dade2;
  --color-success: #52c77a;
  --color-warning: #f5b041;
  --color-danger: #ec7063;
  --color-purple: #af7ac5;
  --color-teal: #48d1cc;
  
  --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
  --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
  --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
  
  --input-focus-bg: #3a3a3a;
  --copy-btn-bg: #3a3a3a;
  --copy-btn-hover-bg: #4a4a4a;
}

/* System Dark Mode Support */
@media (prefers-color-scheme: dark) {
  .color-mixer-container:not(.dark):not(.light) {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-section: #2d2d2d;
    --border-color: #e0e0e0;
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-light: #909090;
    --color-accent: #5dade2;
    --color-success: #52c77a;
    --color-warning: #f5b041;
    --color-danger: #ec7063;
    --color-purple: #af7ac5;
    --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
    --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
    --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
    --input-focus-bg: #3a3a3a;
    --copy-btn-bg: #3a3a3a;
    --copy-btn-hover-bg: #4a4a4a;
  }
}

/* Layout */
.color-mixer-container {
  position: relative;
  max-width: 900px;
  width: 100%;
  margin: 8px auto;
  padding: 8px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-container);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  line-height: 1.5;
}

.header { margin-bottom: 8px; }

.main-title {
  margin: 0 0 4px 0;
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.subtitle {
  margin: 0;
  font-size: 17px;
  color: var(--text-secondary);
}

/* Dark Mode Toggle */
.dark-mode-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 6px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.15);
  font-size: 17.5px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 10;
  border-radius: 8px; /* ⭐ Fixed: 8px Radius */
}

.dark-mode-toggle:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

/* 2-Column Grid */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.input-section, .result-section {
  background: var(--bg-section);
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-md);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}

.section-header svg { stroke: var(--color-accent); }

/* Inputs */
.input-group { margin-bottom: 10px; }
.input-group label {
  display: block;
  margin-bottom: 5px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.color-input-wrapper {
  display: flex;
  gap: 6px;
}

/* Custom Color Swatch */
.color-swatch {
  position: relative;
  width: 50px;
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.color-swatch input[type="color"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  padding: 0;
  margin: 0;
  border: none;
}

.color-swatch:hover {
  filter: brightness(0.95);
}

input[type="text"] {
  flex: 1;
  padding: 7px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 18px;
  font-family: 'Courier New', monospace;
  font-weight: 700;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-sm);
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--input-focus-bg);
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.1);
}

/* Swap Button */
.swap-container {
  display: flex;
  justify-content: center;
  margin: -2px 0 8px 0;
}

.swap-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
}

.swap-btn:hover {
  transform: rotate(180deg) scale(1.1);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* Slider */
.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}

.ratio-reset-btn {
  padding: 2px 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  cursor: pointer;
}

.ratio-reset-btn:hover {
  background: var(--text-secondary);
  color: var(--bg-secondary);
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 10px;
  border-radius: 5px;
  background: #ddd;
  outline: none;
  border: 1px solid var(--border-color);
  margin-top: 4px;
}

.dark .slider { background: #444; }

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 1.5px solid var(--border-color);
  cursor: pointer;
  box-shadow: 1px 1px 0 rgba(0,0,0,0.2);
}

.slider::-webkit-slider-thumb:hover { transform: scale(1.1); }

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--text-light);
}

/* Buttons */
.button-group {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}

.sample-btn, .reset-btn, .save-image-btn {
  width: 100%;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.sample-btn, .reset-btn {
  flex: 1;
  padding: 8px 12px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
}

.sample-btn { background: var(--color-success); color: #fff; }
.reset-btn { background: var(--color-warning); color: #fff; }

.sample-btn:hover, .reset-btn:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2);
}

.sample-btn:active, .reset-btn:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/* Result */
.result-item {
  padding: 8px;
  margin-bottom: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  box-shadow: var(--shadow-sm);
}

.result-label {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
}

.color-preview-large {
  width: 100%;
  height: 100px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  margin-bottom: 12px;
  background-color: #fff;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
}

.color-codes {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.code-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  background: rgba(0,0,0,0.03);
  border-radius: 4px;
}

.code-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-light);
  width: 45px;
}

.code-value {
  flex: 1;
  font-family: 'Courier New', monospace;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
  text-align: center;
}

.result-primary {
  font-size: 24px;
  color: var(--color-accent);
}

.copy-btn {
  padding: 4px 10px;
  background: var(--copy-btn-bg);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover { background: var(--copy-btn-hover-bg); }

.gradient-steps {
  display: flex;
  height: 45px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.step-color {
  flex: 1;
  height: 100%;
  cursor: pointer;
  transition: flex-grow 0.2s;
}

.step-color:hover { flex-grow: 2.5; }

/* Save Button */
.save-image-btn {
  background: var(--color-purple);
  color: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  margin-top: 8px;
  padding: 10px 16px;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
  font-weight: 600;
  font-size: 16px;
}

.save-image-btn:hover {
  filter: brightness(1.05);
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2);
}

.save-image-btn.capturing { display: none; }

.watermark {
  position: absolute;
  bottom: 10px;
  right: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  opacity: 0.6;
  pointer-events: none;
}

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 20px;
  background: var(--text-primary);
  color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 500;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.3);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(-10px);
}

.toast.success { background: var(--color-success); color: #fff; }
.toast.error { background: var(--color-danger); color: #fff; }
.toast.info { background: var(--color-teal); color: #fff; }

@media (max-width: 768px) {
  .color-mixer-container {
    margin: 6px 5px;
    padding: 7px;
    width: calc(100% - 10px);
  }
  .main-grid { grid-template-columns: 1fr; gap: 8px; }
}