/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* 登录页面 */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: #667eea;
    font-size: 28px;
    margin-bottom: 10px;
}

.login-header p {
    color: #666;
    font-size: 14px;
}

.login-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group i {
    margin-right: 5px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

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

.btn-primary:hover {
    background-color: #5568d3;
}

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

.btn-secondary:hover {
    background-color: #5a6268;
}

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

.btn-danger:hover {
    background-color: #c82333;
}

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

.btn-success:hover {
    background-color: #218838;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 12px;
    color: #999;
}

/* 主页面 */
.main-page {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 20px;
    font-weight: 500;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: block;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: background-color 0.3s;
    margin: 5px 10px;
    border-radius: 5px;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-item.active {
    background-color: #667eea;
    color: white;
}

.nav-item i {
    margin-right: 10px;
    width: 20px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
}

.user-info i {
    margin-right: 10px;
    font-size: 20px;
}

.btn-logout {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

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

/* 主内容区 */
.main-content {
    margin-left: 250px;
    flex: 1;
    padding: 30px;
}

.content-header {
    margin-bottom: 30px;
}

.content-header h1 {
    color: #2c3e50;
    font-size: 32px;
}

/* 页面内容 */
.page-content {
    display: none;
}

.page-content.active {
    display: block;
}

/* 仪表盘统计卡片 */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    color: white;
    font-size: 24px;
}

.stat-info h3 {
    font-size: 14px;
    color: #666;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 28px;
    font-weight: bold;
    color: #2c3e50;
}

/* 最近提醒记录 */
.recent-reminders {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.recent-reminders h2 {
    margin-bottom: 20px;
    color: #2c3e50;
}

/* 工具栏 */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.search-box {
    display: flex;
    gap: 10px;
}

.search-box input {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    width: 300px;
}

.filter-box select {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

/* 表格 */
.table-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

table tbody tr:hover {
    background-color: #f8f9fa;
}

table tbody tr:last-child td {
    border-bottom: none;
}

/* 状态标签 */
.status-badge {
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge.active {
    background-color: #28a745;
    color: white;
}

.status-badge.expired {
    background-color: #dc3545;
    color: white;
}

.status-badge.warning {
    background-color: #ffc107;
    color: #333;
}

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

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    padding: 20px;
    gap: 5px;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background: white;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.pagination button:hover {
    background-color: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination button.active {
    background-color: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

/* 标签页 */
.tabs {
    display: flex;
    border-bottom: 2px solid #eee;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    color: #666;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.tab-btn:hover {
    color: #667eea;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 模态框 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal {
    background: white;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

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

.modal-header h2 {
    font-size: 20px;
    color: #2c3e50;
}

.btn-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #999;
    cursor: pointer;
    width: 30px;
    height: 30px;
    padding: 0;
    line-height: 1;
}

.btn-close:hover {
    color: #333;
}

.modal-body {
    padding: 20px;
}

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

/* 设置表单 */
.settings-form {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.settings-form h2 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.settings-form h3 {
    margin: 30px 0 15px 0;
    color: #2c3e50;
    font-size: 18px;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 30px;
}

/* 附件预览 */
.attachment-preview {
    margin-top: 10px;
}

.attachment-item {
    display: flex;
    align-items: center;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 5px;
    margin-bottom: 5px;
}

.attachment-item a {
    color: #667eea;
    text-decoration: none;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.attachment-item .btn-remove {
    color: #dc3545;
    cursor: pointer;
    margin-left: 10px;
}

/* Toast 提示 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 5px;
    color: white;
    font-weight: 500;
    z-index: 9999;
    animation: slideIn 0.3s ease-out;
}

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

.toast.error {
    background-color: #dc3545;
}

.toast.warning {
    background-color: #ffc107;
    color: #333;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .sidebar-header h2,
    .sidebar-footer,
    .user-info span {
        display: none;
    }

    .sidebar-nav {
        padding: 10px 0;
    }

    .nav-item {
        padding: 12px;
        text-align: center;
        margin: 5px;
    }

    .nav-item i {
        margin-right: 0;
    }

    .main-content {
        margin-left: 60px;
        padding: 15px;
    }

    .dashboard-stats {
        grid-template-columns: 1fr;
    }

    .toolbar {
        flex-direction: column;
    }

    .search-box input {
        width: 100%;
    }

    .modal {
        width: 95%;
        margin: 10px;
    }
}