/* Main Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar-sticky {
    position: relative;
    top: 0;
    height: calc(100vh - 48px);
    padding-top: .5rem;
    overflow-x: hidden;
    overflow-y: auto;
}

.sidebar .nav-link {
    font-weight: 500;
    color: #333;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    margin-bottom: 0.25rem;
}

.sidebar .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(52, 152, 219, 0.1);
}

.sidebar .nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(52, 152, 219, 0.05);
}

/* Header */
.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

/* Cards */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    margin-bottom: 1.5rem;
}

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

.card-header {
    border-radius: 10px 10px 0 0 !important;
    font-weight: 600;
}

/* Tables */
.table {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
}

.table th {
    border-top: none;
    font-weight: 600;
    color: var(--secondary-color);
}

.table td {
    vertical-align: middle;
}

/* Buttons */
.btn {
    border-radius: 5px;
    font-weight: 500;
    padding: 0.375rem 1rem;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
}

/* Badges */
.badge {
    padding: 0.5em 0.8em;
    font-weight: 500;
}

/* Forms */
.form-control {
    border-radius: 5px;
    border: 1px solid #ddd;
    padding: 0.5rem 0.75rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--secondary-color);
}

/* Alerts */
.alert {
    border-radius: 10px;
    border: none;
}

/* Dashboard Stats */
.stat-card {
    border-left: 4px solid;
}

.stat-card.bg-primary {
    border-left-color: #2980b9;
}

.stat-card.bg-success {
    border-left-color: #229954;
}

.stat-card.bg-warning {
    border-left-color: #d68910;
}

.stat-card.bg-info {
    border-left-color: #17a2b8;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: static;
        height: auto;
        padding-top: 0;
    }
    
    .sidebar-sticky {
        height: auto;
    }
    
    .table-responsive {
        font-size: 0.9rem;
    }
    
    .btn-sm {
        padding: 0.2rem 0.4rem;
        font-size: 0.8rem;
    }
}