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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

a {
    text-decoration: none;
    color: #1890ff;
    transition: all 0.3s;
}

a:hover {
    color: #40a9ff;
}

input, textarea, select, button {
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

input:focus, textarea:focus, select:focus {
    border-color: #1890ff;
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.col {
    padding: 0 10px;
    flex: 1;
}

.col-1 { width: 8.333333%; }
.col-2 { width: 16.666667%; }
.col-3 { width: 25%; }
.col-4 { width: 33.333333%; }
.col-5 { width: 41.666667%; }
.col-6 { width: 50%; }
.col-7 { width: 58.333333%; }
.col-8 { width: 66.666667%; }
.col-9 { width: 75%; }
.col-10 { width: 83.333333%; }
.col-11 { width: 91.666667%; }
.col-12 { width: 100%; }

.btn {
    display: inline-block;
    padding: 8px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background: #1890ff;
    color: #fff;
}

.btn-primary:hover {
    background: #40a9ff;
}

.btn-success {
    background: #52c41a;
    color: #fff;
}

.btn-success:hover {
    background: #73d13d;
}

.btn-danger {
    background: #ff4d4f;
    color: #fff;
}

.btn-danger:hover {
    background: #ff7875;
}

.btn-warning {
    background: #faad14;
    color: #fff;
}

.btn-warning:hover {
    background: #ffc53d;
}

.btn-default {
    background: #fff;
    color: #333;
    border: 1px solid #d9d9d9;
}

.btn-default:hover {
    color: #40a9ff;
    border-color: #40a9ff;
}

.btn-lg {
    padding: 12px 30px;
    font-size: 16px;
}

.btn-sm {
    padding: 4px 12px;
    font-size: 12px;
}

.btn-block {
    display: block;
    width: 100%;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.3s;
}

.form-control:focus {
    border-color: #1890ff;
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.form-control:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
}

.form-control-lg {
    padding: 12px 16px;
    font-size: 16px;
}

.form-control-sm {
    padding: 6px 10px;
    font-size: 12px;
}

.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 16px;
    font-weight: 500;
    color: #333;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 12px 20px;
    border-top: 1px solid #f0f0f0;
    background: #fafafa;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.table th, .table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

.table th {
    background: #fafafa;
    font-weight: 500;
    color: #333;
}

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

.table-bordered {
    border: 1px solid #f0f0f0;
}

.table-bordered th, .table-bordered td {
    border: 1px solid #f0f0f0;
}

.table-striped tbody tr:nth-child(odd) {
    background: #fafafa;
}

.alert {
    padding: 12px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: #f6ffed;
    border-color: #52c41a;
    color: #52c41a;
}

.alert-danger {
    background: #fff2f0;
    border-color: #ff4d4f;
    color: #ff4d4f;
}

.alert-warning {
    background: #fffbe6;
    border-color: #faad14;
    color: #faad14;
}

.alert-info {
    background: #e6f7ff;
    border-color: #1890ff;
    color: #1890ff;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 12px;
    border-radius: 10px;
    color: #fff;
}

.badge-primary { background: #1890ff; }
.badge-success { background: #52c41a; }
.badge-danger { background: #ff4d4f; }
.badge-warning { background: #faad14; }
.badge-info { background: #13c2c2; }

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-dialog {
    background: #fff;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 16px;
    font-weight: 500;
    color: #333;
}

.modal-close {
    font-size: 24px;
    color: #999;
    cursor: pointer;
    line-height: 1;
}

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

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid #f0f0f0;
    text-align: right;
}

.pagination {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.pagination-item {
    padding: 8px 12px;
    margin: 0 4px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.pagination-item:hover {
    border-color: #1890ff;
    color: #1890ff;
}

.pagination-item.active {
    background: #1890ff;
    color: #fff;
    border-color: #1890ff;
}

.pagination-item.disabled {
    cursor: not-allowed;
    color: #999;
}

.navbar {
    background: #001529;
    color: #fff;
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    font-size: 18px;
    font-weight: 500;
    color: #fff;
}

.navbar-menu {
    display: flex;
    list-style: none;
}

.navbar-menu li {
    margin-left: 20px;
}

.navbar-menu a {
    color: #fff;
    opacity: 0.8;
}

.navbar-menu a:hover {
    opacity: 1;
}

.sidebar {
    background: #001529;
    color: #fff;
    width: 250px;
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    overflow-y: auto;
}

.sidebar-header {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-menu {
    list-style: none;
    padding: 10px 0;
}

.sidebar-menu li {
    padding: 0;
}

.sidebar-menu a {
    display: block;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.65);
    transition: all 0.3s;
}

.sidebar-menu a:hover, .sidebar-menu a.active {
    background: #1890ff;
    color: #fff;
}

.main-content {
    margin-left: 250px;
    padding: 20px;
    min-height: 100vh;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-box {
    background: #fff;
    border-radius: 8px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.login-title {
    text-align: center;
    font-size: 24px;
    font-weight: 500;
    color: #333;
    margin-bottom: 30px;
}

.stat-card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.stat-card-icon-primary { background: #1890ff; }
.stat-card-icon-success { background: #52c41a; }
.stat-card-icon-warning { background: #faad14; }
.stat-card-icon-danger { background: #ff4d4f; }

.stat-card-title {
    font-size: 14px;
    color: #999;
    margin-bottom: 8px;
}

.stat-card-value {
    font-size: 24px;
    font-weight: 500;
    color: #333;
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 22px;
}

.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: 22px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #1890ff;
}

input:checked + .slider:before {
    transform: translateX(22px);
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #1890ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }

.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }

.ml-10 { margin-left: 10px; }
.ml-20 { margin-left: 20px; }

.mr-10 { margin-right: 10px; }
.mr-20 { margin-right: 20px; }

.p-10 { padding: 10px; }
.p-20 { padding: 20px; }
.p-30 { padding: 30px; }

.d-none { display: none !important; }
.d-block { display: block !important; }
.d-inline-block { display: inline-block !important; }
.d-flex { display: flex !important; }

@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .sidebar {
        width: 100%;
        min-height: auto;
        position: relative;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
    .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
        width: 100%;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th, .table td {
        padding: 8px;
    }
    
    .btn {
        padding: 6px 15px;
        font-size: 13px;
    }
    
    .modal-dialog {
        width: 95%;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 13px;
    }
    
    .login-box {
        padding: 30px 20px;
    }
    
    .card-header {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .form-control {
        padding: 8px 10px;
    }
    
    .btn {
        padding: 8px 15px;
    }
}