:root {
    --sidebar-bg: #1e2a3b;
    --sidebar-hover: #2a3a4f;
    --sidebar-active: #3a4a5f;
    --primary-color: #f5683d;
    --text-light: #ffffff;
    --text-muted: #8a94a6;
    --border-color: #2a3a4f;
    --content-bg: #f5f7fa;
    --card-bg: #ffffff;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--content-bg);
    min-height: 100vh;
}

.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    color: var(--text-light);
    font-size: 24px;
    font-weight: 700;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo img {
    height: 35px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 15px 0;
}

.nav-section {
    margin-bottom: 10px;
}

.nav-section-title {
    padding: 10px 20px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.nav-item {
    display: block;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 14px;
}

.nav-link:hover {
    background: var(--sidebar-hover);
    color: var(--text-light);
}

.nav-link.active {
    background: var(--sidebar-active);
    color: var(--text-light);
    border-left: 3px solid var(--primary-color);
}

.nav-link i {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

.nav-submenu {
    display: none;
    background: rgba(0, 0, 0, 0.1);
}

.nav-item.open .nav-submenu {
    display: block;
}

.nav-submenu .nav-link {
    padding-left: 56px;
    font-size: 13px;
}

.nav-toggle {
    margin-left: auto;
    transition: transform 0.2s ease;
}

.nav-item.open .nav-toggle {
    transform: rotate(90deg);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
}

.top-bar {
    background: var(--card-bg);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 50;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--sidebar-bg);
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: #1e2a3b;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

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

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
}

.logout-btn {
    background: none;
    border: 1px solid #ddd;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: #666;
    text-decoration: none;
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background: #f5f5f5;
    border-color: #ccc;
}

/* Content Area */
.content-area {
    padding: 30px;
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

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

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: #1e2a3b;
}

.card-body {
    padding: 20px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background: #e55a32;
}

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

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

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

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

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

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #1e2a3b;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.table-actions {
    display: flex;
    gap: 8px;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #1e2a3b;
}

.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-control-file {
    padding: 8px 0;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

select.form-control {
    cursor: pointer;
}

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

.stat-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

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

.stat-icon.blue { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.stat-icon.green { background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); }
.stat-icon.orange { background: linear-gradient(135deg, #f5683d 0%, #ff8c3d 100%); }
.stat-icon.purple { background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%); }

.stat-info h3 {
    font-size: 28px;
    font-weight: 700;
    color: #1e2a3b;
}

.stat-info p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 5px;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: #d4edda; color: #155724; }
.badge-danger { background: #f8d7da; color: #721c24; }
.badge-warning { background: #fff3cd; color: #856404; }
.badge-info { background: #d1ecf1; color: #0c5460; }

/* Search Box */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e2a3b 0%, #2a3a4f 100%);
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

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

.login-logo h1 {
    font-size: 28px;
    color: #1e2a3b;
}

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

.login-title {
    text-align: center;
    margin-bottom: 30px;
    color: #666;
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
}

@media (max-width: 576px) {
    .content-area {
        padding: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table-responsive {
        overflow-x: auto;
    }
}