/* 主样式文件 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-color: #6c757d;
    --border-color: #dee2e6;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #1a252f 100%);
    color: white;
    padding: 15px 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.logo i {
    color: var(--primary-color);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.avatar-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.notification-badge {
    position: relative;
}

.notification-icon {
    font-size: 20px;
    color: white;
    cursor: pointer;
}

.badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger-color);
    color: white;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* 侧边栏样式 */
.sidebar {
    background: white;
    width: 250px;
    min-height: calc(100vh - 70px);
    position: fixed;
    left: 0;
    top: 70px;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.sidebar-menu {
    padding: 20px 0;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: #555;
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.menu-item:hover {
    background: #f8f9fa;
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.menu-item.active {
    background: #e3f2fd;
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

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

/* 主内容区样式 */
.main-content {
    margin-left: 250px;
    padding: 30px;
    min-height: calc(100vh - 70px);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 28px;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    overflow: hidden;
}

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

.card-header h3 {
    font-size: 18px;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 20px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-card.income .stat-icon {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
}

.stat-card.expense .stat-icon {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.stat-card.balance .stat-icon {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.stat-card.budget .stat-icon {
    background: linear-gradient(135deg, #9b59b6, #8e44ad);
}

.stat-info h3 {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.stat-sub {
    font-size: 12px;
    color: var(--gray-color);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #229954;
}

.btn-warning {
    background: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background: #d68910;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-secondary {
    background: var(--gray-color);
    color: white;
}

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

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

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary-color);
}

.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

/* 表格样式 */
.table-responsive {
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: var(--secondary-color);
    white-space: nowrap;
}

.data-table tr:hover {
    background: #f8f9fa;
}

.data-table .text-success {
    color: var(--success-color);
    font-weight: 500;
}

.data-table .text-danger {
    color: var(--danger-color);
    font-weight: 500;
}

/* 标签样式 */
.badge {
    display: inline-block;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    text-transform: uppercase;
}

.badge-primary {
    background: var(--primary-color);
    color: white;
}

.badge-success {
    background: var(--success-color);
    color: white;
}

.badge-warning {
    background: var(--warning-color);
    color: white;
}

.badge-danger {
    background: var(--danger-color);
    color: white;
}

.badge-info {
    background: var(--info-color);
    color: white;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1100;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h3 {
    font-size: 18px;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.close-modal {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray-color);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.page-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--secondary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

.page-item:hover {
    background: #f8f9fa;
    border-color: var(--primary-color);
}

.page-item.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--gray-color);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 20px;
    color: #e9ecef;
}

.empty-state p {
    margin-bottom: 20px;
    font-size: 16px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: 15px;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .modal-content {
        width: 95%;
    }
}