/* ========================================
   现代化UI - 推广码系统全新设计 (核心CSS)
   ======================================== */

/* 基础变量 */
:root {
  /* 主题颜色 */
  --primary: #4361ee;
  --primary-light: #5e7bf6;
  --primary-dark: #3a56d4;
  --secondary: #06d6a0;
  --warning: #ff9f1c;
  --danger: #e63946;
  --success: #2ec4b6;
  
  /* 浅色主题 - 高级白色 */
  --light-bg: #ffffff;
  --light-surface: #ffffff;
  --light-surface-2: #fafafa;
  --light-surface-3: #f8f8f8;
  --light-border: #eaeaea;
  --light-text: #111827;
  --light-text-secondary: #374151;
  --light-text-muted: #6b7280;
  
  /* 深色主题 */
  --dark-bg: #121212;
  --dark-surface: #1e1e1e;
  --dark-surface-2: #252525;
  --dark-surface-3: #2a2a2a;
  --dark-border: #333333;
  --dark-text: #f8f9fa;
  --dark-text-secondary: #e9ecef;
  --dark-text-muted: #adb5bd;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 3px 8px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.05), 0 3px 6px rgba(0, 0, 0, 0.03);
  
  /* 布局 */
  --card-radius: 12px;
  --btn-radius: 8px;
  --input-radius: 8px;
  
  /* 字体 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

/* 默认使用浅色主题 */
:root {
  --bg-color: var(--light-bg);
  --surface-color: var(--light-surface);
  --surface-color-2: var(--light-surface-2);
  --surface-color-3: var(--light-surface-3);
  --border-color: var(--light-border);
  --text-color: var(--light-text);
  --text-secondary: var(--light-text-secondary);
  --text-muted: var(--light-text-muted);
}

/* 深色主题 */
body.dark-theme {
  --bg-color: var(--dark-bg);
  --surface-color: var(--dark-surface);
  --surface-color-2: var(--dark-surface-2);
  --surface-color-3: var(--dark-surface-3);
  --border-color: var(--dark-border);
  --text-color: var(--dark-text);
  --text-secondary: var(--dark-text-secondary);
  --text-muted: var(--dark-text-muted);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.25s ease, color 0.25s ease;
  margin: 0;
  padding: 0;
}

/* 加载动画 */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s, visibility 0.3s;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

body.loaded .loading-overlay {
  opacity: 0;
  visibility: hidden;
}

/* 卡片组件 */
.card {
  background-color: var(--surface-color);
  border-radius: var(--card-radius);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.card-body {
  padding: 1.25rem;
}

.card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--surface-color);
}

/* 淡入动画 */
.fade-in {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 图标圆圈 */
.icon-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* 按钮 */
.btn-primary {
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: var(--btn-radius);
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

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

.btn-outline-secondary {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--btn-radius);
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

/* 主题切换开关 */
.theme-switch-container {
  position: relative;
  display: flex;
  align-items: center;
}

.theme-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 26px;
  margin: 0;
}

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

.theme-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--surface-color-3);
  border: 1px solid var(--border-color);
  transition: .4s;
  border-radius: 34px;
}

.theme-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 2px;
  background-color: var(--primary);
  transition: .4s;
  border-radius: 50%;
}

input:checked + .theme-slider {
  background-color: var(--surface-color-3);
}

input:checked + .theme-slider:before {
  transform: translateX(33px);
  background-color: var(--primary);
}

.theme-icons {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  padding: 0 6px;
  pointer-events: none;
}

.theme-icons i {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1;
}

input:checked ~ .theme-icons i:first-child {
  color: var(--text-muted);
}

input:checked ~ .theme-icons i:last-child {
  color: var(--primary);
}

input:not(:checked) ~ .theme-icons i:first-child {
  color: var(--primary);
}

input:not(:checked) ~ .theme-icons i:last-child {
  color: var(--text-muted);
}