/* ==========================================================================
   Ivy Color Picker & Magnifier - Premium Design System (Vanilla CSS)
   ========================================================================== */

/* 1. 디자인 토큰 및 변수 (다크 모드 디폴트) */
:root {
  /* Fonts */
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Borders & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Theme: Dark (Default) */
  --bg-app: #090d16;
  --bg-card: rgba(17, 24, 39, 0.6);
  --border-card: rgba(255, 255, 255, 0.08);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-inverse: #0f172a;
  
  /* Accents */
  --primary: #3b82f6;
  --primary-glow: rgba(59, 130, 246, 0.3);
  --primary-hover: #60a5fa;

  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.2);
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.2);
  
  --input-bg: rgba(0, 0, 0, 0.4);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus: #3b82f6;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
  
  --glow-1: rgba(59, 130, 246, 0.15);
  --glow-2: rgba(139, 92, 246, 0.15);
}

/* Theme: Light (Active via [data-theme="light"]) */
html[data-theme="light"] {
  --bg-app: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.7);
  --border-card: rgba(0, 0, 0, 0.08);
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-inverse: #ffffff;
  
  --primary: #2563eb;
  --primary-glow: rgba(37, 99, 235, 0.15);
  --primary-hover: #1d4ed8;

  --accent-green: #059669;
  --accent-green-glow: rgba(5, 150, 105, 0.15);
  --accent-purple: #7c3aed;
  --accent-purple-glow: rgba(124, 58, 237, 0.15);
  
  --input-bg: rgba(255, 255, 255, 0.8);
  --input-border: rgba(0, 0, 0, 0.12);
  --input-focus: #2563eb;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.1);
  
  --glow-1: rgba(37, 99, 235, 0.08);
  --glow-2: rgba(124, 58, 237, 0.08);
}

/* 2. 전역 초기화 및 레이아웃 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  line-height: 1.5;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* 3. 배경 오로라 장식 (Glow) */
.bg-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: var(--radius-full);
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.7;
  transition: background-color var(--transition-normal);
}

.bg-glow-1 {
  top: -100px;
  left: -100px;
  background-color: var(--glow-1);
}

.bg-glow-2 {
  bottom: -100px;
  right: -100px;
  background-color: var(--glow-2);
}

/* 4. 앱 메인 컨테이너 */
.app-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 32px;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 24px;
}

/* 5. 헤더 컴포넌트 */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-card);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-icon-wrapper {
  background: linear-gradient(135deg, var(--primary), var(--accent-purple));
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.logo-icon {
  color: #ffffff;
  width: 26px;
  height: 26px;
  animation: rotateLogo 20s linear infinite;
}

@keyframes rotateLogo {
  100% { transform: rotate(360deg); }
}

.logo-area h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 6. 공통 카드 스타일 (글래스모피즘) */
.card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.glass-card {
  background-color: var(--bg-card);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-card);
}

.card-icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
}

.card-icon.blue-glow { color: var(--primary); }
.card-icon.green-glow { color: var(--accent-green); }
.card-icon.purple-glow { color: var(--accent-purple); }

.card-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.card-body {
  padding: 24px;
}

/* 7. 메인 3단 그리드 레이아웃 */
.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(320px, 350px) 1fr minmax(320px, 380px);
  gap: 24px;
  align-items: start;
}

@media (max-width: 1200px) {
  .dashboard-grid {
    grid-template-columns: 1fr 1.2fr;
  }
  .side-info-section {
    grid-column: span 2;
  }
}

@media (max-width: 800px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .side-info-section, .image-picker-section, .color-picker-section {
    grid-column: span 1;
  }
}

/* 8. 버튼 및 입력 필드 공통 */
.btn {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.primary-btn {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.primary-btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.text-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.text-btn:hover {
  background-color: var(--primary-glow);
}

.danger-text-btn {
  color: #ef4444;
}

.danger-text-btn:hover {
  background-color: rgba(239, 68, 68, 0.15);
}

.icon-btn i {
  width: 16px;
  height: 16px;
}

.action-btn {
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.action-btn:hover {
  border-color: var(--primary);
}

/* 테마 스위처 추가 디테일 */
.theme-toggle-btn .sun-icon { display: none; }
.theme-toggle-btn .moon-icon { display: block; }

html[data-theme="light"] .theme-toggle-btn .sun-icon { display: block; }
html[data-theme="light"] .theme-toggle-btn .moon-icon { display: none; }

/* 9. 세부 구현 - [COLUMN 1] 색상 선택기 */

/* 채도-명도 캔버스 패널 */
.sv-canvas-container {
  width: 100%;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 1.4 / 1;
  background-color: #000;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
  cursor: crosshair;
}

#svCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.sv-cursor {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid #ffffff;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.8), inset 0 0 2px rgba(0, 0, 0, 0.5);
  top: 0px;
  left: 100%;
}

/* 슬라이더 컨트롤러 */
.slider-controls {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.slider-track {
  width: 100%;
  height: 14px;
  border-radius: var(--radius-full);
  position: relative;
  border: 1px solid var(--border-card);
}

/* Hue 무지개 트랙 */
.hue-track {
  background: linear-gradient(to right, 
    #ff0000 0%, #ffff00 17%, #00ff00 33%, 
    #00ffff 50%, #0000ff 67%, #ff00ff 83%, #ff0000 100%
  );
}

/* Alpha 투명도 바둑판무늬 + 그라데이션 트랙 */
.alpha-track {
  background-image: 
    linear-gradient(45deg, #ccc 25%, transparent 25%), 
    linear-gradient(-45deg, #ccc 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #ccc 75%), 
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
}

/* 커스텀 슬라이더 인풋 */
.custom-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 100%;
  background: transparent;
  outline: none;
  position: absolute;
  top: 0;
  left: 0;
  margin: 0;
  cursor: pointer;
}

/* Chrome/Safari 슬라이더 썸 */
.custom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #000000;
  box-shadow: 0 0 3px rgba(255,255,255,0.8);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.custom-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Firefox 슬라이더 썸 */
.custom-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #000000;
  box-shadow: 0 0 3px rgba(255,255,255,0.8);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.custom-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
}

/* 프리뷰 영역 */
.preview-bar {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.color-previews {
  display: flex;
  gap: 10px;
  flex: 1;
}

.preview-block {
  flex: 1;
  height: 48px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  /* 투명 패턴 배경 */
  background-image: 
    linear-gradient(45deg, #ccc 25%, transparent 25%), 
    linear-gradient(-45deg, #ccc 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #ccc 75%), 
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
}

/* 가짜 오버레이로 실제 색상 표시 */
.preview-block::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--preview-color, #ff0000);
  transition: background-color 0.05s ease;
}

.preview-label {
  position: relative;
  z-index: 2;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #ffffff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}

/* 수동 인풋 그리드 */
.color-inputs-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.input-group {
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  padding: 6px 10px;
  transition: border-color var(--transition-fast);
}

.input-group:focus-within {
  border-color: var(--input-focus);
}

.input-group.full-width {
  grid-column: span 4;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.input-prefix {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.input-group.full-width .input-prefix {
  margin-bottom: 0;
  margin-right: 8px;
}

.input-group input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  width: 100%;
}

.input-group.full-width input {
  font-size: 16px;
  letter-spacing: 0.5px;
}

/* HTML number 인풋 화살표 제거 */
.input-group input::-webkit-outer-spin-button,
.input-group input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.input-group input[type=number] {
  -moz-appearance: textfield;
}

.copy-input-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast);
}

.copy-input-btn:hover {
  color: var(--primary);
}

.copy-input-btn i {
  width: 16px;
  height: 16px;
}

/* 보관함 (히스토리) 리스트 */
.color-history-wrapper {
  margin-top: 24px;
  border-top: 1px solid var(--border-card);
  padding-top: 18px;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.history-header h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
}

.history-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 110px;
  overflow-y: auto;
  padding-right: 4px;
}

.history-chip {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  background-image: 
    linear-gradient(45deg, #ccc 25%, transparent 25%), 
    linear-gradient(-45deg, #ccc 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #ccc 75%), 
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 6px 6px;
}

.history-chip::after {
  content: '';
  position: absolute;
  top:0; left:0; width:100%; height:100%;
  background-color: var(--chip-color);
  border-radius: inherit;
}

.history-chip:hover {
  transform: scale(1.15) translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.empty-text {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
  width: 100%;
  text-align: center;
  padding: 12px 0;
}

/* 10. 세부 구현 - [COLUMN 2] 이미지 스포이트 & 돋보기 */
.image-card-body {
  display: flex;
  flex-direction: column;
  gap: 20px;
  height: calc(100% - 63px); /* 헤더 영역 제외하고 꽉 채우기 */
  min-height: 480px;
  position: relative;
}

/* 드롭존 영역 */
.upload-dropzone {
  flex: 1;
  border: 2px dashed var(--input-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  background-color: rgba(0, 0, 0, 0.15);
  transition: all var(--transition-normal);
}

.upload-dropzone:hover, .upload-dropzone.drag-active {
  border-color: var(--accent-green);
  background-color: var(--accent-green-glow);
}

.upload-icon {
  width: 54px;
  height: 54px;
  color: var(--text-muted);
  margin-bottom: 16px;
  transition: color var(--transition-normal), transform var(--transition-normal);
}

.upload-dropzone:hover .upload-icon {
  color: var(--accent-green);
  transform: translateY(-4px);
}

.upload-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.upload-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* 이미지 워크스페이스 */
.image-workspace {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.workspace-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.workspace-info {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.workspace-info i {
  width: 14px;
  height: 14px;
  color: var(--primary);
}

.image-canvas-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0,0,0,0.3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  overflow: hidden;
  position: relative;
  min-height: 300px;
  max-height: 500px;
}

#imageCanvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  cursor: crosshair;
  display: block;
}

/* 실시간 돋보기 패널 (Magnifier Panel) */
.magnifier-panel {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-lg);
  pointer-events: none; /* 마우스 이벤트 방해 금지 */
  opacity: 0;
  transform: translateY(10px) scale(0.95);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  z-index: 10;
}

.magnifier-panel.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.magnifier-canvas-container {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--text-main);
  position: relative;
  box-shadow: var(--shadow-sm);
  background-color: #000;
}

#magnifierCanvas {
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated; /* 픽셀 뭉개짐 방지 */
}

/* 돋보기 조준 십자선 */
.magnifier-crosshair {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border: 1px solid #ffffff;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.magnifier-crosshair::before {
  content: '';
  position: absolute;
  width: 14px;
  height: 1px;
  background-color: rgba(255,255,255,0.7);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.magnifier-crosshair::after {
  content: '';
  position: absolute;
  width: 1px;
  height: 14px;
  background-color: rgba(255,255,255,0.7);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.magnifier-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.magnifier-color-preview {
  width: 48px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 0 2px rgba(0,0,0,0.5);
}

.magnifier-coords {
  display: flex;
  flex-direction: column;
}

#coordsHex {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

#coordsXY {
  font-size: 10px;
  color: var(--text-muted);
}

/* 11. 세부 구현 - [COLUMN 3] CSS 제너레이터 & 트렌드 팔레트 */
.tools-card-body {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.css-generator-block h3, .trend-palettes-block h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 14px;
  letter-spacing: -0.2px;
}

.css-snippets-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.snippet-item {
  background-color: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color var(--transition-fast);
}

.snippet-item:hover {
  border-color: var(--accent-purple);
}

.snippet-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.snippet-item code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #c9d1d9;
  word-break: break-all;
  white-space: pre-wrap;
}

html[data-theme="light"] .snippet-item code {
  color: #24292f;
}

.copy-snippet-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  transition: all var(--transition-fast);
}

.copy-snippet-btn:hover {
  color: var(--accent-purple);
  background-color: rgba(139, 92, 246, 0.15);
}

.copy-snippet-btn i {
  width: 14px;
  height: 14px;
}

/* 트렌드 색상표 (Trend Palettes) */
.palette-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 8px;
}

.palette-block-header h3 {
  margin-bottom: 0;
}

.palette-tabs {
  display: flex;
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  padding: 2px;
  border-radius: var(--radius-sm);
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  background-color: var(--bg-card);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

.palette-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.palette-row {
  display: flex;
  flex-direction: column;
  background-color: rgba(0, 0, 0, 0.12);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 10px;
  gap: 8px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.palette-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.palette-title {
  font-size: 12px;
  font-weight: 600;
}

.palette-color-group {
  display: flex;
  height: 38px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.palette-color-chip {
  flex: 1;
  height: 100%;
  cursor: pointer;
  position: relative;
  transition: flex-grow var(--transition-normal);
}

.palette-color-chip:hover {
  flex-grow: 1.6;
}

/* 칩 호버 시 툴팁처럼 HEX 코드 오버레이 */
.palette-color-chip::after {
  content: attr(data-color);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background-color: rgba(0, 0, 0, 0.85);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 9px;
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
  z-index: 10;
}

.palette-color-chip:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(-8px);
}

/* 12. 푸터 */
.app-footer {
  text-align: center;
  padding-top: 24px;
  margin-top: auto;
  border-top: 1px solid var(--border-card);
  font-size: 12px;
  color: var(--text-muted);
}

/* 13. 토스트 알림창 (Toast Container) */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background-color: rgba(15, 23, 42, 0.9);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideUpFade 0.3s cubic-bezier(0.16, 1, 0.3, 1), fadeOut 0.3s ease 2.2s forwards;
}

@keyframes slideUpFade {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* 스크롤바 커스터마이징 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-card);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}