/* Reset và Font */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #c41e3a 0%, #8b0000 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
    display: inline-block;
}

.header-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 5px;
}

.header-title i {
    margin-right: 10px;
}

.header-subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.header-actions {
    float: right;
    margin-top: 10px;
}

.user-info {
    margin-right: 15px;
    font-size: 14px;
}

/* Navigation */
.nav {
    background: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-item {
    padding: 15px 20px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    font-weight: 500;
}

.nav-item:hover {
    background: #f8f9fa;
    border-bottom-color: #c41e3a;
}

.nav-item.active {
    background: #fff3f3;
    border-bottom-color: #c41e3a;
    color: #c41e3a;
}

.nav-item i {
    margin-right: 8px;
}

/* Main */
.main {
    padding: 30px 0;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Filter Section */
.filter-section {
    background: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 25px;
    display: flex;
    gap: 15px;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    font-weight: 500;
    white-space: nowrap;
}

/* KPI Cards */
.kpi-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.kpi-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.kpi-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.kpi-card.highlight {
    background: linear-gradient(135deg, #ffeaa7 0%, #fdcb6e 100%);
}

.kpi-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
}

.kpi-icon.blue { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.kpi-icon.green { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
.kpi-icon.orange { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
.kpi-icon.red { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }

.kpi-value {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    line-height: 1;
    margin-bottom: 5px;
}

.kpi-label {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(0,0,0,0.1);
    border-radius: 4px;
    margin-top: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #c41e3a 0%, #ff6b6b 100%);
    transition: width 0.6s ease;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 60% 40%;
    gap: 25px;
    margin-bottom: 30px;
}

@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* Card */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    margin-bottom: 25px;
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 18px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.card-header i {
    margin-right: 8px;
}

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

.card-body {
    padding: 25px;
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table thead {
    background: #f8f9fa;
    position: sticky;
    top: 0;
}

.table th {
    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;
}

.progress-bar-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}

.progress-bar-mini {
    flex: 1;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-mini .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #28a745 0%, #20c997 100%);
}

/* Status Badge */
.badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

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

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

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

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

.btn-success {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e063 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, #f2994a 0%, #f2c94c 100%);
    color: white;
}

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

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

.btn-logout {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Form */
.form-input,
.form-select {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    font-size: 14px;
    transition: border 0.3s;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #495057;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.required {
    color: #dc3545;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid #e9ecef;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #6c757d;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
}

.tab-btn:hover {
    color: #495057;
    background: #f8f9fa;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    animation: slideDown 0.3s;
}

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

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 25px;
    border-radius: 12px 12px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 20px;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 28px;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    padding: 30px 25px;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 20px 25px;
    background: #f8f9fa;
    border-radius: 0 0 12px 12px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid #dee2e6;
    background: white;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s;
}

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

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

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.page-header h2 {
    color: white;
    font-size: 28px;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, #c41e3a 0%, #8b0000 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.login-logo {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.login-logo i {
    font-size: 40px;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

.login-header p {
    font-size: 14px;
    opacity: 0.9;
}

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

.login-footer {
    padding: 20px 30px;
    background: #f8f9fa;
    text-align: center;
}

.login-info {
    font-size: 13px;
    color: #6c757d;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 15px;
    display: none;
    font-size: 14px;
}

.error-message.show {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .header-actions {
        float: none;
        margin-top: 15px;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 0;
    }
    
    .kpi-section {
        grid-template-columns: 1fr;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th,
    .table td {
        padding: 8px 10px;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }