:root {
    --primary-color: #4e73df;
    --secondary-color: #858796;
    --success-color: #1cc88a;
    --danger-color: #e74a3b;
    --warning-color: #f6c23e;
    --info-color: #36b9cc;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --sidebar-width: 250px;
}

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

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

.wrapper {
    display: flex;
    width: 100%;
    align-items: stretch;
}

#sidebar {
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    background: #2c3e50;
    color: #fff;
    transition: all 0.3s;
    min-height: 100vh;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

#sidebar .sidebar-header {
    padding: 20px;
    background: #1a252f;
    border-bottom: 1px solid #34495e;
}

#sidebar .sidebar-header h3 {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}

#sidebar ul.components {
    padding: 20px 0;
}

#sidebar ul li a {
    padding: 15px 20px;
    font-size: 1rem;
    display: block;
    color: #ecf0f1;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

#sidebar ul li a:hover,
#sidebar ul li a.active {
    background: #34495e;
    border-left-color: var(--primary-color);
    color: #fff;
}

#sidebar ul li a i {
    margin-right: 10px;
    width: 20px;
}

#content {
    width: 100%;
    padding: 0;
    min-height: 100vh;
    transition: all 0.3s;
    background: transparent;
}

.top-navbar {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 15px 30px;
    margin-bottom: 30px;
}

.main-content {
    padding: 0 30px 30px 30px;
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.95);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #224abe 100%);
    color: white;
    border-radius: 10px 10px 0 0 !important;
    padding: 15px 20px;
    font-weight: 600;
}

.stat-card {
    border-radius: 10px;
    padding: 20px;
    color: white;
    margin-bottom: 20px;
    transition: transform 0.3s;
}

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

.stat-card.primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #224abe 100%);
}

.stat-card.success {
    background: linear-gradient(135deg, var(--success-color) 0%, #13855c 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #dda20a 100%);
}

.stat-card.danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #be2617 100%);
}

.stat-card.info {
    background: linear-gradient(135deg, var(--info-color) 0%, #258391 100%);
}

.stat-card.tertiary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #6c757d 100%);
}

.stat-card h3 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-card p {
    margin: 0;
    opacity: 0.9;
}

.btn-primary {
    background: var(--primary-color);
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: #224abe;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    overflow: hidden;
    max-width: 450px;
    width: 100%;
}

.auth-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #224abe 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.auth-body {
    padding: 30px;
}

.form-control {
    border-radius: 5px;
    border: 1px solid #ddd;
    padding: 12px;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

.table {
    background: white;
}

.badge {
    padding: 5px 10px;
    border-radius: 5px;
}

#map {
    height: 500px;
    width: 100%;
    border-radius: 10px;
}

.hostel-list {
    max-height: 500px;
    overflow-y: auto;
}

.hostel-item {
    padding: 15px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    transition: background 0.3s;
}

.hostel-item:hover {
    background: #f8f9fa;
}

.alert {
    border-radius: 5px;
    padding: 15px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    #sidebar {
        min-width: 70px;
        max-width: 70px;
    }
    
    #sidebar .sidebar-header h3,
    #sidebar ul li a span {
        display: none;
    }
    
    .main-content {
        padding: 0 15px 15px 15px;
    }
}