/* =============================================
   Freemail 美化主题 v3.0
   现代化设计系统 - 支持亮色/暗色模式
   UI/UX Pro Max 优化版：专业 SVG 图标 + Poppins/Open Sans 字体
   ============================================= */

/* ===== Google Fonts 字体系统 ===== */
* {
  font-family: 'Poppins', 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
  font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 600;
  line-height: 1.3;
}

/* ===== SVG 图标系统 ===== */
.btn-icon svg,
.section-icon svg,
.sidebar-icon svg,
.card-icon svg,
.modal-icon svg,
.label-icon svg {
  display: inline-block;
  vertical-align: middle;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* SVG 图标颜色继承 */
svg use {
  fill: inherit;
  stroke: inherit;
}

/* Hover 状态图标效果 */
.btn:hover .btn-icon svg,
.btn-ghost:hover svg {
  transform: scale(1.1);
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== 交互优化 ===== */
/* 所有可点击元素添加 cursor-pointer */
.btn,
.btn-ghost,
.sidebar-toggle-btn,
.close,
.email-item,
.mailbox-item,
.seg-btn,
a {
  cursor: pointer;
  user-select: none;
}

/* 增强 Hover 状态 */
.btn-ghost:hover {
  background: var(--primary-glass);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

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

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

.btn-generate:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 30px rgba(99, 102, 241, 0.35);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}

/* 侧边栏按钮 hover */
.sidebar-toggle-btn:hover {
  background: var(--primary-glass);
  transform: scale(1.1);
}

/* 关闭按钮 hover */
.close:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  transform: rotate(90deg);
}

/* ===== 性能优化 ===== */
/* 使用 transform/opacity 进行动画 */
.btn,
.card,
.modal-card,
.sidebar {
  will-change: transform, opacity;
}

/* 减少动画偏好支持 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== Focus 状态（可访问性） ===== */
.btn:focus-visible,
.input:focus-visible,
.select:focus-visible,
.textarea:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.status-badge{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--card-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: var(--transition);
}
.status-queued{ color: #b45309; background: linear-gradient(135deg, rgba(245, 158, 11, .15), rgba(251, 191, 36, .1)); border-color: rgba(245, 158, 11, .4); box-shadow: 0 2px 8px rgba(245, 158, 11, .15); }
.status-delivered{ color: #047857; background: linear-gradient(135deg, rgba(16, 185, 129, .15), rgba(52, 211, 153, .1)); border-color: rgba(16, 185, 129, .4); box-shadow: 0 2px 8px rgba(16, 185, 129, .15); }
.status-failed{ color: #b91c1c; background: linear-gradient(135deg, rgba(239, 68, 68, .15), rgba(248, 113, 113, .1)); border-color: rgba(239, 68, 68, .4); box-shadow: 0 2px 8px rgba(239, 68, 68, .15); }
.status-processing{ color: #1d4ed8; background: linear-gradient(135deg, rgba(59, 130, 246, .15), rgba(96, 165, 250, .1)); border-color: rgba(59, 130, 246, .4); box-shadow: 0 2px 8px rgba(59, 130, 246, .15); }

:root{
  /* ===== 增强背景系统 ===== */
  --surface: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 25%, #f8fafc 50%, #fff1f2 75%, #fef3e8 100%);
  --surface-overlay: linear-gradient(135deg, rgba(248, 250, 252, 0.85) 0%, rgba(241, 245, 249, 0.92) 100%);
  --surface-pattern: radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.03) 0%, transparent 50%);
  --surface-mesh: 
    radial-gradient(at 40% 20%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 80% 0%, rgba(236, 72, 153, 0.06) 0px, transparent 50%),
    radial-gradient(at 0% 50%, rgba(16, 185, 129, 0.06) 0px, transparent 50%),
    radial-gradient(at 80% 50%, rgba(245, 158, 11, 0.05) 0px, transparent 50%),
    radial-gradient(at 0% 100%, rgba(59, 130, 246, 0.08) 0px, transparent 50%);
  
  /* ===== 增强卡片系统 ===== */
  --card: rgba(255, 255, 255, 0.88);
  --card-hover: rgba(255, 255, 255, 0.96);
  --card-glass: rgba(255, 255, 255, 0.65);
  --card-glass-hover: rgba(255, 255, 255, 0.85);
  --card-gradient: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.95) 100%);
  --card-gradient-accent: linear-gradient(135deg, rgba(99, 102, 241, 0.03) 0%, rgba(236, 72, 153, 0.02) 100%);
  
  /* ===== 增强主色系 - 更鲜艳的渐变 ===== */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-active: #4338ca;
  --primary-light: rgba(99, 102, 241, 0.12);
  --primary-glass: rgba(99, 102, 241, 0.06);
  --primary-rgb: 99, 102, 241;
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
  --primary-gradient-soft: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.1) 100%);
  
  /* ===== 次要色系 ===== */
  --secondary: #8b5cf6;
  --secondary-hover: #7c3aed;
  --secondary-light: rgba(139, 92, 246, 0.12);
  --secondary-gradient: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
  
  /* ===== 强调色系 ===== */
  --accent: #ec4899;
  --accent-hover: #db2777;
  --accent-light: rgba(236, 72, 153, 0.12);
  --accent-gradient: linear-gradient(135deg, #ec4899 0%, #f472b6 100%);
  
  /* ===== 增强状态颜色 ===== */
  --success: #10b981;
  --success-hover: #059669;
  --success-light: rgba(16, 185, 129, 0.12);
  --success-gradient: linear-gradient(135deg, #10b981 0%, #34d399 100%);
  
  --warning: #f59e0b;
  --warning-hover: #d97706;
  --warning-light: rgba(245, 158, 11, 0.12);
  --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-active: #b91c1c;
  --danger-light: rgba(239, 68, 68, 0.12);
  --danger-gradient: linear-gradient(135deg, #ef4444 0%, #f87171 100%);
  
  --info: #0ea5e9;
  --info-hover: #0284c7;
  --info-light: rgba(14, 165, 233, 0.12);
  --info-gradient: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);
  
  /* ===== 增强文字颜色 ===== */
  --text: #0f172a;
  --text-light: #334155;
  --text-muted: #64748b;
  --text-secondary: #94a3b8;
  --text-disabled: #cbd5e1;
  --text-inverse: #ffffff;
  
  /* ===== 增强边框系统 ===== */
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --border-dark: #cbd5e1;
  --border-glass: rgba(255, 255, 255, 0.25);
  --border-glass-dark: rgba(0, 0, 0, 0.06);
  --border-focus: rgba(99, 102, 241, 0.4);
  --border-gradient: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(236, 72, 153, 0.2));
  
  /* ===== 增强圆角系统 ===== */
  --radius: 16px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* ===== 增强阴影系统 ===== */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.12);
  --shadow-2xl: 0 35px 60px -15px rgba(0, 0, 0, 0.15);
  --shadow-glass: 0 8px 32px rgba(99, 102, 241, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-colored: 0 10px 30px rgba(99, 102, 241, 0.2);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-button: 0 4px 14px rgba(99, 102, 241, 0.25), 0 2px 6px rgba(0, 0, 0, 0.08);
  --shadow-button-hover: 0 8px 25px rgba(99, 102, 241, 0.35), 0 4px 10px rgba(0, 0, 0, 0.1);
  
  /* ===== 增强动画系统 ===== */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  
  /* ===== 毛玻璃效果 ===== */
  --blur-sm: blur(8px);
  --blur-md: blur(16px);
  --blur-lg: blur(24px);
  --blur-xl: blur(32px);
}
*{
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* 允许选择文本的重要元素 */
input,
textarea,
select,
.email-text,
.email-display,
#modal-content,
.table td,
.table th,
pre,
code,
.selectable,
.custom-input,
.field-input,
.field-textarea {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

/* 移动端触摸优化 - 防止长按选择 */
@media (max-width: 768px) {
  button,
  .btn,
  .sidebar-toggle-btn,
  .close,
  .nav-actions > *,
  .mailbox-actions > * {
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
  }
}

body{
  margin: 0;
  min-height: 100vh;
  background: var(--surface);
  background-attachment: fixed;
  font-family: 'SF Pro Display', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  line-height: 1.65;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

/* 增强演示横幅 */
.demo-banner{
  background: linear-gradient(90deg, #fef3c7 0%, #fce7f3 50%, #ddd6fe 100%);
  color: #1f2937;
  text-align: center;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}

.demo-banner::before{
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: bannerShimmer 3s infinite;
}

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

/* 增强动态背景 */
body::before{
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: var(--surface-mesh);
  animation: backgroundFloat 25s ease-in-out infinite;
  z-index: -2;
  pointer-events: none;
}

body::after{
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(236, 72, 153, 0.08), transparent),
    radial-gradient(ellipse 50% 60% at 0% 80%, rgba(16, 185, 129, 0.08), transparent);
  z-index: -1;
  pointer-events: none;
  animation: backgroundPulse 15s ease-in-out infinite alternate;
}

@keyframes backgroundFloat {
  0%, 100% { 
    transform: translateX(-30px) translateY(-20px) rotate(0deg) scale(1); 
  }
  25% { 
    transform: translateX(30px) translateY(20px) rotate(1deg) scale(1.02); 
  }
  50% { 
    transform: translateX(-20px) translateY(30px) rotate(-0.5deg) scale(1); 
  }
  75% { 
    transform: translateX(20px) translateY(-15px) rotate(0.5deg) scale(1.01); 
  }
}

@keyframes backgroundPulse {
  0% { opacity: 0.8; }
  100% { opacity: 1; }
}

/* ===== 增强顶部导航栏 ===== */
.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--card-glass);
  backdrop-filter: var(--blur-xl);
  -webkit-backdrop-filter: var(--blur-xl);
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 32px;
  gap: 20px;
  transition: var(--transition);
  box-shadow: var(--shadow-glass), inset 0 -1px 0 var(--border-glass);
}

.topbar::before{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.topbar:hover::before{
  opacity: 0.8;
}

/* 增强品牌标识 */
.brand{
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.03em;
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--text);
  text-decoration: none;
  transition: var(--transition);
}

.brand:hover{
  transform: scale(1.02);
}

.brand span{
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  background-size: 200% 200%;
  animation: gradientFlow 3s ease infinite;
}

@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.brand-icon{
  font-size: 26px;
  animation: iconPulse 2.5s ease-in-out infinite;
  filter: drop-shadow(0 2px 4px rgba(99, 102, 241, 0.3));
}

/* 增强角色徽章 */
.role-badge{ 
  margin-left: 12px; 
  padding: 6px 14px; 
  border-radius: var(--radius-full); 
  font-weight: 700; 
  font-size: 13px; 
  letter-spacing: .3px;
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  transition: var(--transition);
}

.role-badge:hover{
  transform: translateY(-1px) scale(1.02);
}

.role-user{ 
  color: var(--text-light); 
  background: linear-gradient(135deg, rgba(241, 245, 249, 0.9), rgba(226, 232, 240, 0.8)); 
  border: 1px solid var(--border); 
  box-shadow: var(--shadow-xs), inset 0 1px 0 rgba(255,255,255,.8); 
}

.role-admin{ 
  color: #047857; 
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(52, 211, 153, 0.1)); 
  border: 1px solid rgba(16, 185, 129, 0.3); 
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2), inset 0 1px 0 rgba(255,255,255,.5); 
}

.role-super{ 
  color: var(--text-inverse); 
  background: var(--primary-gradient); 
  border: none;
  box-shadow: var(--shadow-colored), inset 0 1px 0 rgba(255,255,255,.3); 
  text-shadow: 0 1px 2px rgba(0,0,0,.2); 
}

@keyframes iconPulse {
  0%, 100% { transform: scale(1) rotate(0deg); }
  25% { transform: scale(1.05) rotate(-3deg); }
  50% { transform: scale(1.1) rotate(0deg); }
  75% { transform: scale(1.05) rotate(3deg); }
}
.tagline{
  display: none;
}

.nav-actions{
  display: flex;
  gap: 8px;
  margin-left: auto;
  align-items: center;
}

/* ===== 主题切换按钮 ===== */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  min-width: 38px;
  padding: 0;
  border-radius: 50%;
  background: var(--card-glass);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-xs);
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  transform: scale(1.15) rotate(20deg);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.theme-toggle-btn:hover .btn-icon svg {
  color: var(--primary);
}

.theme-toggle-btn .btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
}

.theme-toggle-btn .btn-icon svg {
  color: var(--text-muted);
  transition: color 0.3s ease, transform 0.3s ease;
}

/* 暗黑模式下按钮样式 */
:root.dark .theme-toggle-btn {
  background: rgba(30, 41, 59, 0.85);
  border-color: rgba(255, 255, 255, 0.15);
}

:root.dark .theme-toggle-btn:hover {
  background: rgba(99, 102, 241, 0.25);
  border-color: #6366f1;
}

.btn-ghost{
  background: transparent;
  color: var(--text-light);
  border: 1px dashed rgba(226, 232, 240, 0.6);
  box-shadow: none;
}

.btn-ghost:hover{
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(59, 130, 246, 0.04) 100%);
  border: 1px solid var(--primary);
  color: var(--primary);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.15);
  transform: translateY(-2px) scale(1.01);
}

.container{
  max-width: 1200px; /* 与头部对齐 */
  margin: 0 auto;
  padding: 24px 24px 32px;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  align-items: start;
  min-height: calc(100vh - 100px);
}