/* CSS Variables for Theme */
*,
*::before,
*::after {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --primary-dark: #4f46e5;
  --secondary-color: #ec4899;
  --accent-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --success-color: #22c55e;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --border-dark: #cbd5e1;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  --gradient-primary: #2563eb;
  --gradient-secondary: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  --radius-xs: 0.125rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-overlay: rgba(0, 0, 0, 0.7);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  --border-color: #334155;
  --border-light: #475569;
  --border-dark: #64748b;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.5);
}

/* Auto theme detection */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-overlay: rgba(0, 0, 0, 0.7);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-light: #475569;
    --border-dark: #64748b;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.5);
  }
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Scroll Buttons */
.scroll-buttons {
  position: fixed;
  right: var(--spacing-xl);
  bottom: var(--spacing-xl);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.scroll-btn {
  width: 3rem;
  height: 3rem;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0.9;
  position: relative;
  overflow: hidden;
}

.scroll-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.scroll-btn:hover {
  opacity: 1;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15), 0 4px 16px rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.scroll-btn:hover::before {
  opacity: 1;
}

.scroll-btn:active {
  transform: translateY(-1px) scale(1.02);
  transition: all 0.1s ease;
}

/* 日间模式下的滚动按钮样式 */
[data-theme="light"] .scroll-btn {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.1);
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .scroll-btn:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(0, 0, 0, 0.15);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* 自动主题检测下的滚动按钮样式 */
:root:not([data-theme]) .scroll-btn {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.1);
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
}

:root:not([data-theme]) .scroll-btn:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(0, 0, 0, 0.15);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* Header & Navigation */
.header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1001;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  gap: var(--spacing-xl);
}

.nav-brand {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  margin-left: auto;
  margin-right: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-primary);
  cursor: pointer;
}

/* Logo SVG 动画效果 - GPU硬件加速 */
.logo svg {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  animation: logoBreathing 4s ease-in-out infinite;
}

/* 悬停效果 */
.logo:hover svg {
  transform: scale(1.05) rotate(2deg);
}

/* 呼吸动画 - 轻微缩放 */
@keyframes logoBreathing {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
}

/* Logo色块基础样式 */
.logo svg rect {
  opacity: 1;
  transform: translateY(0);
  will-change: fill, transform;
}

/* 为每个色块设置不同的延迟 */
.logo svg rect:nth-child(1) { animation-delay: 0.1s; }
.logo svg rect:nth-child(2) { animation-delay: 0.2s; }
.logo svg rect:nth-child(3) { animation-delay: 0.3s; }
.logo svg rect:nth-child(4) { animation-delay: 0.4s; }
.logo svg rect:nth-child(5) { animation-delay: 0.5s; }
.logo svg rect:nth-child(6) { animation-delay: 0.6s; }
.logo svg rect:nth-child(7) { animation-delay: 0.7s; }
.logo svg rect:nth-child(8) { animation-delay: 0.8s; }

@keyframes colorBlockFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 3D立体键盘按键跳跃效果 */
.logo svg {
  perspective: 1000px;
  transform-style: preserve-3d;
}

.logo svg rect {
  transform-origin: center center;
  will-change: transform, filter;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

/* 为每个色块设置不同的3D按键动画 */
.logo svg rect:nth-child(1) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 0s;
}

.logo svg rect:nth-child(2) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 0.3s;
}

.logo svg rect:nth-child(3) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 0.6s;
}

.logo svg rect:nth-child(4) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 0.9s;
}

.logo svg rect:nth-child(5) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 1.2s;
}

.logo svg rect:nth-child(6) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 1.5s;
}

.logo svg rect:nth-child(7) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 1.8s;
}

.logo svg rect:nth-child(8) {
  animation: keyPress3D 2s ease-in-out infinite;
  animation-delay: 2.1s;
}

/* 悬停时加速按键效果 */
.logo:hover svg rect {
  animation-duration: 1s !important;
}

/* 3D键盘按键跳跃动画关键帧 */
@keyframes keyPress3D {
  0% {
    transform: translateZ(0) scale(1) rotateX(0deg);
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3)) brightness(1);
  }
  
  15% {
    transform: translateZ(-8px) scale(0.95) rotateX(5deg);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5)) brightness(1.1);
  }
  
  30% {
    transform: translateZ(12px) scale(1.1) rotateX(-3deg);
    filter: drop-shadow(0 8px 16px rgba(0,0,0,0.2)) brightness(1.2);
  }
  
  45% {
    transform: translateZ(6px) scale(1.05) rotateX(2deg);
    filter: drop-shadow(0 6px 12px rgba(0,0,0,0.25)) brightness(1.1);
  }
  
  60% {
    transform: translateZ(-2px) scale(0.98) rotateX(1deg);
    filter: drop-shadow(0 3px 6px rgba(0,0,0,0.4)) brightness(1.05);
  }
  
  75% {
    transform: translateZ(4px) scale(1.02) rotateX(-1deg);
    filter: drop-shadow(0 5px 10px rgba(0,0,0,0.3)) brightness(1.08);
  }
  
  100% {
    transform: translateZ(0) scale(1) rotateX(0deg);
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3)) brightness(1);
  }
}

@keyframes colorFlow8 {
  0%, 100% { fill: #FD79A8; }
  25% { fill: #FD99B8; }
  50% { fill: #FDB9C8; }
  75% { fill: #FDD9D8; }
}

/* 减少动画偏好设置的用户体验优化 */
@media (prefers-reduced-motion: reduce) {
  .logo svg {
    animation: none;
    transition: none;
  }
  .logo svg rect {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

.brand-text {
  font-size: 1.8rem;
  font-weight: 700;
}

.brand-text-red {
  color: #FD79A8;
}

.brand-text-blue {
  color: #45B7D1;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link svg {
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background-color: var(--bg-tertiary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.action-btn, .icon-btn {
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  border-radius: var(--radius-md);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.action-btn:hover, .icon-btn:hover {
  background-color: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-1px);
}

.theme-toggle .moon-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: block;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 1.5rem;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition-fast);
  transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(3px, 3px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(3px, -3px);
}

/* Main Content */
.main {
  min-height: calc(100vh - 80px);
}

.section {
  padding: 4rem 0;
}

#generator {
  padding: 0.67rem 0 4rem 0;
}

.section:nth-child(even) {
  background-color: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Hero Section */
.hero-section {
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: 3rem 0 0.375rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* 夜间模式英雄区域 */
[data-theme="dark"] .hero-section {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* 自动主题检测 - 夜间模式 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .hero-section {
    background: var(--bg-secondary);
    color: var(--text-primary);
  }
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23e2e8f0" opacity="0.3"/><circle cx="75" cy="75" r="1" fill="%23e2e8f0" opacity="0.3"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grain)"/></svg>');
  opacity: 0.5;
  pointer-events: none;
}

/* 夜间模式纹理 */
[data-theme="dark"] .hero-section::before {
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23475569" opacity="0.3"/><circle cx="75" cy="75" r="1" fill="%23475569" opacity="0.3"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

/* 自动主题检测 - 夜间模式纹理 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .hero-section::before {
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23475569" opacity="0.3"/><circle cx="75" cy="75" r="1" fill="%23475569" opacity="0.3"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
  }
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
  line-height: 1.6;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.feature-tag {
  background-color: var(--primary-color);
  color: var(--text-inverse);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

/* 夜间模式feature-tag */
[data-theme="dark"] .feature-tag {
  background-color: var(--primary-color);
  color: var(--text-inverse);
}

/* 自动主题检测 - 夜间模式feature-tag */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .feature-tag {
    background-color: var(--primary-color);
    color: var(--text-inverse);
  }
}

.cta-btn {
  background: var(--primary-color);
  color: var(--text-inverse);
  border: 2px solid var(--primary-color);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.cta-btn:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-2px);
}

/* 日间模式按钮样式 */
[data-theme="light"] .cta-btn {
  background: var(--primary-color);
  color: white;
  border: 2px solid var(--primary-color);
}

[data-theme="light"] .cta-btn:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: white;
}

/* 自动主题检测 - 日间模式按钮 */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .cta-btn {
    background: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
  }
  
  :root:not([data-theme]) .cta-btn:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    color: white;
  }
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  margin-bottom: var(--spacing-xl);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* Generator Workspace */
.generator-workspace {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.generator-controls {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.control-group label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.color-input-group {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.color-input-group input[type="color"] {
  width: 3rem;
  height: 3rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  background: none;
}

.color-input-group input[type="text"] {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  transition: all var(--transition-fast);
}

.color-input-group input[type="text"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.slider-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.slider-group input[type="range"] {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  outline: none;
  -webkit-appearance: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.slider-group input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
}

.slider-group span {
  min-width: 2rem;
  text-align: center;
  font-weight: 600;
  color: var(--text-primary);
}

.control-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.primary-btn, .secondary-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.primary-btn {
  background: var(--gradient-primary);
  color: var(--text-inverse);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.secondary-btn {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

/* Color Palette Display */
.color-palette-display {
  position: relative;
}

.palette-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.palette-header h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
}

.palette-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.color-palette {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.palette-color {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: var(--spacing-sm);
  border-radius: var(--radius-lg);
}

.palette-color:hover {
  transform: scale(1.05);
  background-color: var(--bg-tertiary);
}

.color-swatch {
  width: 100%;
  height: 80px;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.color-swatch::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 45%, rgba(0,0,0,0.1) 50%, transparent 55%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.palette-color:hover .color-swatch::after {
  opacity: 1;
}

.color-info {
  text-align: center;
  width: 100%;
}

.color-hex {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.color-rgb {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.palette-info {
  background-color: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.color-formats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-sm);
}

.format-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm);
  background-color: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.format-label {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.format-value {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
  color: var(--text-primary);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.tool-card {
  padding: var(--spacing-xl);
}

.tool-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.tool-icon {
  font-size: 2rem;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: var(--text-inverse);
}

.tool-header h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
}

.tool-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

/* Contrast Checker */
.contrast-checker {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contrast-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.contrast-color {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contrast-color label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.contrast-color input[type="color"] {
  width: 100%;
  height: 3rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.contrast-result {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.contrast-ratio {
  font-weight: 600;
  color: var(--text-primary);
}

.contrast-grade {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
}

.contrast-grade.aaa {
  background-color: var(--success-color);
  color: white;
}

.contrast-grade.aa {
  background-color: var(--warning-color);
  color: white;
}

.contrast-grade.fail {
  background-color: var(--danger-color);
  color: white;
}

.contrast-preview {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  text-align: center;
}

.preview-text {
  font-size: 1.125rem;
  font-weight: 600;
}

/* Color Converter */
.color-converter {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.color-converter input[type="color"] {
  width: 100%;
  height: 4rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.format-outputs {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.format-output {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.format-output label {
  width: 3rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.format-output input {
  flex: 1;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
}

/* History Panel */
.history-panel {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.history-list {
  max-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.history-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.history-item:hover {
  background-color: var(--bg-tertiary);
  transform: translateX(4px);
}

.history-colors {
  display: flex;
  gap: var(--spacing-xs);
}

.history-color {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.history-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.history-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.history-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Color Picker Tool */
.color-picker-tool {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.image-upload-area {
  position: relative;
}

.upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-2xl);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  background-color: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.upload-label:hover {
  border-color: var(--primary-color);
  background-color: var(--bg-tertiary);
}

.upload-label svg {
  color: var(--text-muted);
  transition: color var(--transition-normal);
}

.upload-label:hover svg {
  color: var(--primary-color);
}

.upload-label span {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1rem;
}

.upload-label small {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.extracted-colors {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  min-height: 3rem;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
}

.extracted-color {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.extracted-color:hover {
  transform: scale(1.05);
  border-color: var(--text-primary);
}

.extracted-color::after {
  content: attr(data-color);
  position: absolute;
  bottom: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.extracted-color:hover::after {
  opacity: 1;
}

.picker-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Gradient Generator Tool */
.gradient-generator-tool {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.gradient-preview {
  width: 100%;
  height: 8rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.gradient-controls {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.gradient-type-selector {
  display: flex;
  gap: var(--spacing-md);
}

.gradient-type-selector label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  color: var(--text-primary);
  cursor: pointer;
}

.gradient-direction {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.gradient-direction label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  min-width: 5rem;
}

.gradient-direction input[type="range"] {
  flex: 1;
}

.gradient-direction span {
  min-width: 3rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 600;
}

.gradient-colors {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
}

.color-stop {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.color-stop input[type="color"] {
  width: 3rem;
  height: 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.color-stop span {
  min-width: 3rem;
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 600;
}

.remove-color {
  width: 2rem;
  height: 2rem;
  border: none;
  background-color: var(--danger-color);
  color: white;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.remove-color:hover:not(:disabled) {
  background-color: #dc2626;
  transform: scale(1.05);
}

.remove-color:disabled {
  background-color: var(--text-muted);
  cursor: not-allowed;
}

.gradient-output {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.gradient-output textarea {
  min-height: 4rem;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  resize: vertical;
}

.gradient-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* ===== 色彩库样式 ===== */
.library-filters {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  justify-content: center;
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-xl);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.palette-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-color);
}

.palette-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.palette-preview {
  height: 120px;
  display: flex;
}

.palette-color {
  flex: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.palette-color:hover {
  flex: 1.5;
}

.palette-color::after {
  content: attr(data-color);
  position: absolute;
  bottom: var(--spacing-sm);
  left: var(--spacing-sm);
  right: var(--spacing-sm);
  color: white;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.75rem;
  background: rgba(0, 0, 0, 0.5);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.palette-color:hover::after {
  opacity: 1;
}

.palette-info {
  padding: var(--spacing-lg);
}

.palette-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.palette-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.palette-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Trends Grid */
.trends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.trend-card {
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.trend-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.trend-preview {
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: calc(-1 * var(--spacing-xl)) calc(-1 * var(--spacing-xl)) var(--spacing-md);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  position: relative;
}

.trend-preview h4 {
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.trend-colors {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.trend-color {
  flex: 1;
  height: 2rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.trend-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.apply-trend-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gradient-secondary);
  color: var(--text-inverse);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.apply-trend-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.about-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
  font-size: 1.25rem;
}

.about-card ul {
  list-style: none;
  padding-left: 0;
}

.about-card li {
  padding: var(--spacing-sm) 0;
  padding-left: var(--spacing-lg);
  position: relative;
  line-height: 1.6;
}

.about-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
}

.use-cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.use-case {
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
}

.use-case h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.use-case p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-weight: 600;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: var(--spacing-xs) 0;
}

.footer-link:hover {
  color: var(--primary-color);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-info p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
}

.social-link:hover {
  color: var(--primary-color);
  background-color: var(--bg-tertiary);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1001;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-overlay);
  backdrop-filter: blur(5px);
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow: hidden;
  animation: modalSlideIn 0.3s ease-out;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-xl);
}

.export-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.export-options label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.export-options label:hover {
  background-color: var(--bg-tertiary);
}

.export-options input[type="radio"]:checked + span {
  color: var(--primary-color);
  font-weight: 600;
}

#exportCode {
  width: 100%;
  height: 200px;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  resize: vertical;
  margin-bottom: var(--spacing-lg);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-md);
}

.modal-actions button {
  flex: 1;
}

/* Animations */
@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

.slide-up {
  animation: slideUp 0.5s ease-out;
}

.scale-in {
  animation: scaleIn 0.3s ease-out;
}

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Loading States */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .generator-workspace {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  .trends-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .navbar {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    flex-direction: column;
    gap: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu li {
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-menu li:last-child {
    border-bottom: none;
  }
  
  .nav-menu .nav-link {
    padding: var(--spacing-md) 0;
    width: 100%;
    justify-content: flex-start;
  }
  
  .mobile-menu-toggle {
    display: flex;
    order: 1;
    margin-left: var(--spacing-sm);
  }
  
  .nav-brand {
    order: 2;
    flex: 0 0 auto;
    margin-left: var(--spacing-sm);
  }
  
  .nav-actions {
    display: flex;
    gap: var(--spacing-sm);
    order: 3;
    margin-left: auto;
  }
  
  .favorite-btn {
    display: none;
  }
  
  .action-btn {
    padding: var(--spacing-xs);
    width: 2.5rem;
    height: 2.5rem;
  }
  
  .action-btn svg {
    width: 1rem;
    height: 1rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .scroll-buttons {
    right: var(--spacing-md);
    bottom: var(--spacing-md);
  }
  
  .scroll-btn {
    width: 2.5rem;
    height: 2.5rem;
  }
  
  .card {
    padding: var(--spacing-lg);
  }
  
  .color-palette {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contrast-inputs {
    grid-template-columns: 1fr;
  }
  
  .export-options {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .color-palette {
    grid-template-columns: 1fr;
  }
  
  .trend-colors {
    height: 1.5rem;
  }
  
  .modal-content {
    width: 95%;
    margin: var(--spacing-md);
  }
  
  .modal-header,
  .modal-body {
    padding: var(--spacing-md);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* Focus styles for accessibility */
button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .header,
  .scroll-buttons,
  .nav-actions,
  .footer {
    display: none;
  }
  
  .main {
    margin: 0;
  }
  
  .card {
    border: 1px solid #000;
    box-shadow: none;
    break-inside: avoid;
  }
  
  .color-swatch {
    border: 2px solid #000;
  }
}

/* === 懒加载相关样式 === */
.load-more-btn {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl) 0;
  margin: var(--spacing-lg) 0;
}

.load-more-btn button {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  border-radius: var(--radius-lg);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.load-more-btn button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.load-more-btn button:active {
  transform: translateY(0);
}

/* 加载状态样式 */
.loading-placeholder {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: var(--spacing-sm);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 色盲友好检测样式 */
.colorblind-simulator {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.simulator-controls {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.simulator-controls select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.875rem;
}

.colorblind-comparison {
  margin-bottom: var(--spacing-lg);
}

.colorblind-comparison h4 {
  margin: 0 0 var(--spacing-sm) 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.color-strip {
  display: flex;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.color-block {
  flex: 1;
  height: 40px;
  min-width: 40px;
}

.colorblind-analysis {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
}

.colorblind-analysis h4 {
  margin: 0 0 var(--spacing-sm) 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.analysis-result {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.analysis-result.excellent {
  background-color: #dcfce7;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.analysis-result.good {
  background-color: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

.analysis-result.fair {
  background-color: #fed7aa;
  color: #9a3412;
  border: 1px solid #fdba74;
}

.analysis-result.poor {
  background-color: #fecaca;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

[data-theme="dark"] .analysis-result.excellent {
  background-color: #14532d;
  color: #bbf7d0;
  border-color: #166534;
}

[data-theme="dark"] .analysis-result.good {
  background-color: #451a03;
  color: #fde68a;
  border-color: #92400e;
}

[data-theme="dark"] .analysis-result.fair {
  background-color: #7c2d12;
  color: #fed7aa;
  border-color: #ea580c;
}

[data-theme="dark"] .analysis-result.poor {
  background-color: #7f1d1d;
  color: #fecaca;
  border-color: #dc2626;
}

.result-score {
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
}

.analysis-tips {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.analysis-tips strong {
  color: var(--text-primary);
}