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

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 260px;
    height: 100vh;
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-header {
    padding: 30px 20px;
    background: rgba(0,0,0,0.1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h3 {
    color: #fff;
    font-size: 24px;
    font-weight: 600;
    margin: 0;
    text-align: center;
}

.sidebar-header .subtitle {
    color: rgba(255,255,255,0.6);
    font-size: 12px;
    text-align: center;
    margin-top: 5px;
}

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

.menu-section {
    margin-bottom: 20px;
}

.menu-section-title {
    color: rgba(255,255,255,0.4);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 10px 20px;
    font-weight: 600;
}

.menu-item {
    display: block;
    padding: 12px 20px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    font-size: 14px;
}

.menu-item:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border-left-color: #3498db;
}

.menu-item.active {
    background: rgba(52, 152, 219, 0.2);
    color: #fff;
    border-left-color: #3498db;
}

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

/* 主内容区域 */
.main-content {
    margin-left: 260px;
    padding: 30px;
    min-height: 100vh;
}

/* 顶部导航栏 */
.top-navbar {
    background: #fff;
    border-radius: 10px;
    padding: 20px 30px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title {
    font-size: 24px;
    color: #2c3e50;
    font-weight: 600;
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
}

.user-name {
    color: #2c3e50;
    font-weight: 500;
}

.logout-btn {
    background: #e74c3c;
    color: #fff;
    border: none;
    padding: 8px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.logout-btn:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

/* 内容卡片 */
.content-card {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.card-title {
    font-size: 18px;
    color: #2c3e50;
    font-weight: 600;
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    background: #f8f9fa;
    color: #2c3e50;
    font-weight: 600;
    padding: 15px;
    text-align: left;
    border-bottom: 2px solid #e9ecef;
}

.table td {
    padding: 15px;
    border-bottom: 1px solid #e9ecef;
    color: #495057;
}

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

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

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: #fff;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(17, 153, 142, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
    color: #fff;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(235, 51, 73, 0.4);
}

.btn-info {
    background: linear-gradient(135deg, #3498db 0%, #2ecc71 100%);
    color: #fff;
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

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

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

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    font-size: 14px;
    transition: all 0.3s ease;
    height: auto;
    line-height: normal;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 下拉选择框样式 */
select.form-control {
    height: 45px !important;
    padding: 10px 15px !important;
    -webkit-appearance: auto !important;
    -moz-appearance: auto !important;
    appearance: auto !important;
    min-height: 45px !important;
    line-height: 45px !important;
}

select.form-control option {
    padding: 10px !important;
    font-size: 14px !important;
    line-height: 1.5 !important;
    height: 30px !important;
}

/* 模态框中的下拉选择框 */
.modal-body select.form-control {
    height: 45px !important;
    padding: 10px 15px !important;
    font-size: 14px !important;
}

/* 模态框样式 */
.modal-content {
    border-radius: 10px;
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 10px 10px 0 0;
    padding: 20px;
}

.modal-header h4 {
    margin: 0;
    font-weight: 600;
}

.modal-body {
    padding: 30px;
}

/* 状态标签 */
.label {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 500;
}

.label-success {
    background: #d4edda;
    color: #155724;
}

.label-danger {
    background: #f8d7da;
    color: #721c24;
}

.label-warning {
    background: #fff3cd;
    color: #856404;
}

.label-info {
    background: #d1ecf1;
    color: #0c5460;
}

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

.stat-card {
    background: #fff;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

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

.stat-icon.bg-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-icon.bg-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.stat-icon.bg-info {
    background: linear-gradient(135deg, #3498db 0%, #2ecc71 100%);
}

.stat-icon.bg-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 5px;
}

.stat-label {
    color: #6c757d;
    font-size: 14px;
}

/* 登录页面特殊样式 */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 450px;
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 40px 30px;
    text-align: center;
}

.login-header h2 {
    color: #fff;
    margin: 0;
    font-size: 28px;
    font-weight: 600;
}

.login-header p {
    color: rgba(255,255,255,0.8);
    margin-top: 10px;
}

.login-body {
    padding: 40px 30px;
}

.login-tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 2px solid #f0f0f0;
}

.login-tab {
    flex: 1;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    color: #6c757d;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

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

.login-form {
    display: none;
}

.login-form.active {
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }
    
    .sidebar-header h3,
    .sidebar-header .subtitle,
    .menu-section-title,
    .menu-item span {
        display: none;
    }
    
    .main-content {
        margin-left: 60px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}