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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-name {
    font-weight: 500;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 主要内容区域 */
.main-content {
    display: flex;
    min-height: calc(100vh - 80px);
}

/* 侧边栏样式 */
.sidebar {
    width: 250px;
    background: white;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
}

.sidebar-menu {
    list-style: none;
}

.menu-item {
    padding: 12px 20px;
    cursor: pointer;
    transition: background 0.3s ease;
    border-left: 3px solid transparent;
}

.menu-item:hover {
    background: #f8f9fa;
}

.menu-item.active {
    background: #f0f2ff;
    border-left-color: #667eea;
    color: #667eea;
    font-weight: 500;
}

.menu-item i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

/* 内容区域样式 */
.content {
    flex: 1;
    padding: 30px;
    background: #f8f9fa;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e1e5e9;
}

.content-title {
    font-size: 24px;
    font-weight: 600;
    color: #333;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 25px;
    margin-bottom: 20px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.1);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
    transform: translateY(-1px);
}

.btn-info {
    background: #17a2b8;
    color: white;
}

.btn-info:hover {
    background: #138496;
    transform: translateY(-1px);
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-1px);
}

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

/* 表格样式 */
.table-container {
    overflow-x: auto;
    margin-bottom: 20px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.table th {
    background: #f8f9fa;
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    color: #495057;
    border-bottom: 2px solid #dee2e6;
}

.table td {
    padding: 12px 15px;
    border-bottom: 1px solid #dee2e6;
}

.table tbody tr:hover {
    background: #f8f9fa;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.pagination-info {
    color: #6c757d;
    font-size: 14px;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-btn {
    padding: 8px 16px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.page-btn:hover:not(:disabled) {
    background: #f8f9fa;
    border-color: #667eea;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.current-page {
    font-weight: 500;
    color: #667eea;
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #e1e5e9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: #6c757d;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid #e1e5e9;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 消息提示样式 */
.message {
    padding: 12px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
    display: block;
}

/* 工具类 */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-3 {
    margin-bottom: 15px;
}

.mb-4 {
    margin-bottom: 20px;
}

.mt-3 {
    margin-top: 15px;
}

.mt-4 {
    margin-top: 20px;
}

.d-flex {
    display: flex;
}

.align-items-center {
    align-items: center;
}

.justify-content-between {
    justify-content: space-between;
}

.gap-2 {
    gap: 10px;
}

.gap-3 {
    gap: 15px;
}

/* 操作按钮组样式 */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.action-buttons .btn {
    margin: 0;
    flex-shrink: 0;
}

/* 顶部签到按钮样式 */
.sign-top-btn {
    margin-right: 8px;
}

/* 开关控件样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #28a745;
}

input:focus + .slider {
    box-shadow: 0 0 1px #28a745;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        box-shadow: none;
        border-bottom: 1px solid #e1e5e9;
    }
    
    .content {
        padding: 20px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .user-info {
        flex-direction: column;
        gap: 10px;
    }
    
    /* 在移动设备上优化操作按钮 */
    .action-buttons {
        gap: 4px;
    }
    
    .action-buttons .btn {
        padding: 5px 8px;
        font-size: 11px;
    }
}

/* 邮箱编辑区域样式 */
.email-edit-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.email-display-wrapper {
    flex: 1;
    min-width: 200px;
}

.email-input-wrapper {
    display: none;
    flex: 1;
    min-width: 200px;
}

.email-buttons-wrapper {
    display: flex;
    gap: 8px;
    flex-wrap: nowrap;
    align-items: center;
}

.email-buttons-wrapper .btn {
    white-space: nowrap;
    min-width: 70px;
}

/* 编辑状态下的布局 */
.email-edit-container.editing {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 10px;
}

.email-edit-container.editing .email-display-wrapper {
    display: none;
}

.email-edit-container.editing .email-input-wrapper {
    display: block;
    grid-column: 1;
    grid-row: 1;
    max-width: 100%;
}

.email-edit-container.editing .email-buttons-wrapper {
    grid-column: 2;
    grid-row: 1;
    align-self: start;
}

.email-edit-container.editing #emailMessage {
    grid-column: 1 / span 2;
    grid-row: 2;
}

/* 在更小的屏幕上进一步优化 */
@media (max-width: 480px) {
    .action-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .action-buttons .btn {
        width: 100%;
        margin-bottom: 4px;
    }
    
    .email-edit-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .email-display-wrapper,
    .email-input-wrapper {
        width: 100%;
        min-width: unset;
    }
    
    .email-buttons-wrapper {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
}