/* ============================================
   Cloudflare Mail - Apple 风格设计系统
   ============================================ */

/* CSS 变量 - 浅色主题 */
:root {
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f0f0f2;
  --bg-sidebar: rgba(255, 255, 255, 0.8);
  --bg-card: #ffffff;
  --bg-hover: rgba(0, 0, 0, 0.04);
  --bg-active: rgba(0, 125, 250, 0.1);

  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --text-inverse: #ffffff;

  --accent: #007aff;
  --accent-hover: #0066d6;
  --accent-light: rgba(0, 122, 255, 0.1);
  --danger: #ff3b30;
  --success: #34c759;
  --warning: #ff9500;

  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text',
    'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --sidebar-width: 260px;
  --detail-width: 420px;
  --header-height: 56px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 深色主题 */
[data-theme="dark"] {
  --bg-primary: #1c1c1e;
  --bg-secondary: #2c2c2e;
  --bg-tertiary: #3a3a3c;
  --bg-sidebar: rgba(44, 44, 46, 0.9);
  --bg-card: #2c2c2e;
  --bg-hover: rgba(255, 255, 255, 0.06);
  --bg-active: rgba(0, 125, 250, 0.15);

  --text-primary: #f5f5f7;
  --text-secondary: #98989d;
  --text-tertiary: #6e6e73;
  --text-inverse: #1d1d1f;

  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.2);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* ============================================
   基础样式
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

input, textarea, button, select {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================
   按钮系统
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-weight: 500;
  white-space: nowrap;
}

.btn:hover {
  background: var(--bg-hover);
  transform: scale(1.02);
}

.btn:active {
  transform: scale(0.98);
}

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

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

.btn-full {
  width: 100%;
  padding: 12px;
  font-size: 15px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
  background: transparent;
}

.btn-icon:hover {
  background: var(--bg-hover);
}

.btn-text {
  background: transparent;
  color: var(--accent);
  padding: 8px 12px;
}

.btn-text:hover {
  background: var(--accent-light);
}

.btn-compose {
  width: 100%;
  padding: 14px 20px;
  margin: 16px 0;
  background: var(--accent);
  color: var(--text-inverse);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  justify-content: center;
}

.btn-compose:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.compose-icon {
  font-size: 18px;
}

/* ============================================
   输入框系统
   ============================================ */
.input-group {
  margin-bottom: 16px;
}

.input-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.input-group input:focus,
.input-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

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

/* ============================================
   认证页面
   ============================================ */
.auth-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 20px;
}

.auth-container {
  width: 100%;
  max-width: 400px;
}

.auth-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.auth-logo h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.auth-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

.auth-form {
  display: flex;
  flex-direction: column;
}

.auth-switch {
  text-align: center;
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* ============================================
   主应用布局
   ============================================ */
.app-view {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* 侧边栏 */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #5856d6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 16px;
  flex-shrink: 0;
}

.user-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-name {
  font-weight: 600;
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-email {
  font-size: 12px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

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

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

.sidebar-nav {
  flex: 1;
  padding: 8px 12px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--bg-hover);
  text-decoration: none;
}

.nav-item.active {
  background: var(--bg-active);
  color: var(--accent);
  font-weight: 600;
}

.nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.nav-label {
  flex: 1;
}

.nav-badge {
  background: var(--danger);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.btn-logout {
  width: 100%;
  justify-content: center;
  color: var(--danger);
}

/* ============================================
   主内容区
   ============================================ */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.content-header {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  height: var(--header-height);
  flex-shrink: 0;
}

.content-header h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.content-actions {
  display: flex;
  gap: 8px;
}

/* 邮件列表 */
.email-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.email-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
  border: 1px solid transparent;
}

.email-item:hover {
  background: var(--bg-hover);
}

.email-item.active {
  background: var(--bg-active);
  border-color: var(--accent);
}

.email-item.unread {
  background: var(--bg-secondary);
  border-color: var(--border);
}

.email-item.unread .email-sender {
  font-weight: 700;
}

.email-item.unread .email-subject {
  font-weight: 600;
}

.email-item-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #34c759, #30d158);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 15px;
  flex-shrink: 0;
}

.email-item-content {
  flex: 1;
  min-width: 0;
}

.email-item-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
}

.email-sender {
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

.email-time {
  font-size: 12px;
  color: var(--text-tertiary);
  flex-shrink: 0;
  margin-left: 8px;
}

.email-subject {
  font-size: 14px;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.email-preview {
  font-size: 13px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.email-attach-icon {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-left: 8px;
}

/* 空状态 */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 300px;
  color: var(--text-tertiary);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.5;
}

/* 分页 */
.pagination {
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.page-info {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ============================================
   邮件详情面板
   ============================================ */
.detail-panel {
  width: var(--detail-width);
  border-left: 1px solid var(--border);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.detail-header {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
}

.detail-actions {
  display: flex;
  gap: 8px;
}

.detail-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.detail-subject {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 20px;
  line-height: 1.3;
}

.detail-meta {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.detail-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff9500, #ff6b00);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 16px;
  flex-shrink: 0;
}

.detail-info {
  flex: 1;
}

.detail-from {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 2px;
}

.detail-to {
  font-size: 13px;
  color: var(--text-secondary);
}

.detail-date {
  font-size: 13px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.detail-body {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  word-break: break-word;
}

.detail-body p {
  margin-bottom: 12px;
}

/* 附件区域 */
.detail-attachments {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.attachments-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.attachment-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.attachment-icon {
  font-size: 24px;
}

.attachment-info {
  flex: 1;
  min-width: 0;
}

.attachment-name {
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attachment-size {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============================================
   写邮件弹窗
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn var(--transition-normal);
}

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

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

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 90%;
  max-width: 640px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  animation: slideUp var(--transition-normal);
  border: 1px solid var(--border);
}

.modal-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 700;
}

.compose-form {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.compose-field {
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
}

.compose-field label {
  display: block;
  padding: 12px 0 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.compose-field input {
  width: 100%;
  padding: 10px 0;
  border: none;
  background: transparent;
  color: var(--text-primary);
  outline: none;
  font-size: 14px;
}

.compose-body-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-bottom: none;
}

.compose-body-field textarea {
  flex: 1;
  width: 100%;
  padding: 10px 0;
  border: none;
  background: transparent;
  color: var(--text-primary);
  outline: none;
  resize: none;
  font-size: 14px;
  line-height: 1.6;
  min-height: 200px;
}

.compose-attachments {
  padding: 0 20px;
  max-height: 120px;
  overflow-y: auto;
}

.compose-attach-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-size: 13px;
}

.compose-attach-item .btn-icon {
  width: 24px;
  height: 24px;
  font-size: 12px;
}

.compose-footer {
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
}

.compose-left, .compose-right {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn-attach {
  cursor: pointer;
}

/* ============================================
   Toast 提示
   ============================================ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 280px;
  max-width: 400px;
  animation: slideIn var(--transition-normal);
  border: 1px solid var(--border);
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--accent); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

.toast-icon { font-size: 18px; }
.toast-message { flex: 1; font-size: 14px; }

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .detail-panel {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: var(--detail-width);
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -100%;
    top: 0;
    bottom: 0;
    z-index: 200;
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open {
    left: 0;
  }

  .detail-panel {
    max-width: 100%;
  }

  .modal {
    width: 95%;
    max-height: 90vh;
  }
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 3px;
}

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

/* 选中文本样式 */
::selection {
  background: var(--accent);
  color: white;
}