/* ============================================
   云卡栈 - 深度高级感UI设计系统 v2.0
   Deep Premium UI Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* 主色调 - 深邃星空蓝 */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  --primary-950: #172554;
  
  /* 高级渐变 */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-ocean: linear-gradient(135deg, #2193b0 0%, #6dd5ed 100%);
  --gradient-sunset: linear-gradient(135deg, #ee0979 0%, #ff6a00 100%);
  --gradient-forest: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  --gradient-dark: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  --gradient-gold: linear-gradient(135deg, #f7971e 0%, #ffd200 100%);
  
  /* 语义色 */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;
  
  /* 中性色 - 高级灰 */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gray-950: #030712;
  
  /* 文字 */
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-tertiary: var(--gray-400);
  --text-inverse: #ffffff;
  
  /* 背景 */
  --bg-primary: #ffffff;
  --bg-secondary: var(--gray-50);
  --bg-tertiary: var(--gray-100);
  --bg-card: #ffffff;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  /* 边框 */
  --border-light: var(--gray-200);
  --border-medium: var(--gray-300);
  
  /* 高级阴影系统 */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
  
  /* 彩色阴影 */
  --shadow-primary: 0 4px 15px rgba(102, 126, 234, 0.4);
  --shadow-primary-lg: 0 10px 30px rgba(102, 126, 234, 0.5);
  --shadow-success: 0 4px 15px rgba(16, 185, 129, 0.4);
  --shadow-danger: 0 4px 15px rgba(239, 68, 68, 0.4);
  
  /* 毛玻璃 */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-dark: rgba(17, 24, 39, 0.72);
  --glass-blur: blur(20px) saturate(180%);
  --glass-border: 1px solid rgba(255, 255, 255, 0.3);
  
  /* 圆角 */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  
  /* 字体 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;
  --text-4xl: 36px;
  
  /* 过渡 */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ============================================
   全局重置
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* 选中文字 */
::selection {
  background: rgba(102, 126, 234, 0.2);
  color: var(--primary-900);
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}
::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gray-400);
}

/* ============================================
   高级感卡片
   ============================================ */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-normal);
  overflow: hidden;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--primary-200);
}

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.card-gradient {
  background: var(--gradient-primary);
  color: white;
  border: none;
}

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

/* ============================================
   高级感按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:active::after {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-primary);
}

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

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-primary);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--primary-600);
  border: 1.5px solid var(--primary-200);
}

.btn-secondary:hover {
  background: var(--primary-50);
  border-color: var(--primary-400);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

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

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  box-shadow: var(--shadow-danger);
}

.btn-success {
  background: var(--gradient-forest);
  color: white;
  box-shadow: var(--shadow-success);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================
   高级感输入框
   ============================================ */
.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
}

.input:focus {
  border-color: var(--primary-400);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.input::placeholder {
  color: var(--text-tertiary);
}

.input-group {
  position: relative;
}

.input-group .input-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}

.input-group .input {
  padding-left: 44px;
}

/* ============================================
   高级感标签
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.3px;
}

.badge-primary {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
  color: var(--primary-600);
  border: 1px solid rgba(102, 126, 234, 0.2);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-gold {
  background: var(--gradient-gold);
  color: #78350f;
  border: none;
}

/* ============================================
   高级感渐变文字
   ============================================ */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-gold {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   高级感导航栏
   ============================================ */
.navbar {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-xs);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  font-size: var(--text-xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.navbar-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

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

.navbar-link:hover::after {
  width: 100%;
}

/* ============================================
   高级感列表
   ============================================ */
.list-item {
  display: flex;
  align-items: center;
  padding: var(--space-4);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.list-item:hover {
  background: var(--bg-secondary);
  padding-left: calc(var(--space-4) + 8px);
}

.list-item:last-child {
  border-bottom: none;
}

/* ============================================
   高级感头像
   ============================================ */
.avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-lg);
  box-shadow: var(--shadow-md);
  border: 2px solid white;
  flex-shrink: 0;
}

.avatar-lg {
  width: 64px;
  height: 64px;
  font-size: var(--text-2xl);
}

.avatar-sm {
  width: 32px;
  height: 32px;
  font-size: var(--text-sm);
}

/* ============================================
   高级感进度条
   ============================================ */
.progress {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  100% { left: 100%; }
}

/* ============================================
   高级感加载动画
   ============================================ */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid rgba(102, 126, 234, 0.2);
  border-top-color: var(--primary-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 骨架屏 */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================
   高级感浮动按钮
   ============================================ */
.fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  border: none;
  box-shadow: var(--shadow-primary-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-bounce);
  z-index: 1000;
}

.fab:hover {
  transform: scale(1.1) rotate(90deg);
  box-shadow: var(--shadow-2xl);
}

.fab:active {
  transform: scale(0.95);
}

/* ============================================
   高级感分割线
   ============================================ */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-medium), transparent);
  margin: var(--space-6) 0;
}

/* ============================================
   高级感提示框
   ============================================ */
.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.alert-info {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--info);
  color: #0e7490;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--success);
  color: #047857;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--warning);
  color: #b45309;
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  color: #b91c1c;
}

/* ============================================
   高级感表格
   ============================================ */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-light);
}

.table td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
}

.table tr:hover td {
  background: var(--bg-secondary);
}

/* ============================================
   高级感模态框
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: 700;
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ============================================
   高级感标签页
   ============================================ */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--border-light);
  gap: var(--space-6);
}

.tab {
  padding: var(--space-3) 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
  border: none;
  background: none;
}

.tab::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

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

.tab.active {
  color: var(--primary-600);
}

.tab.active::after {
  width: 100%;
}

/* ============================================
   高级感开关
   ============================================ */
.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 28px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--gray-300);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

.switch-slider::before {
  content: '';
  position: absolute;
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: all var(--transition-bounce);
  box-shadow: var(--shadow-sm);
}

.switch input:checked + .switch-slider {
  background: var(--gradient-primary);
}

.switch input:checked + .switch-slider::before {
  transform: translateX(20px);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 768px) {
  .card:hover {
    transform: none;
  }
  
  .navbar-menu {
    display: none;
  }
  
  .modal {
    width: 95%;
    border-radius: var(--radius-lg);
  }
  
  .fab {
    width: 48px;
    height: 48px;
    bottom: 16px;
    right: 16px;
  }
  
  .table {
    font-size: var(--text-xs);
  }
  
  .table th, .table td {
    padding: var(--space-2);
  }
}

/* ============================================
   深色模式
   ============================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: var(--gray-100);
    --text-secondary: var(--gray-400);
    --bg-primary: var(--gray-950);
    --bg-secondary: var(--gray-900);
    --bg-tertiary: var(--gray-800);
    --bg-card: var(--gray-900);
    --border-light: var(--gray-800);
    --glass-bg: rgba(17, 24, 39, 0.72);
  }
  
  .card {
    border-color: var(--gray-800);
  }
  
  .input {
    background: var(--gray-800);
    border-color: var(--gray-700);
  }
  
  .input:focus {
    background: var(--gray-800);
  }
}

/* ============================================
   工具类
   ============================================ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-sm { font-size: 14px; }
.text-lg { font-size: 18px; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--primary-600); }
.w-full { width: 100%; }
.hidden { display: none; }