:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    line-height: 1.6;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar .nav-link {
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.1) !important;
}

.btn {
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.15);
}

.input-group-text {
    border: 1px solid #ced4da;
}

.table-hover tbody tr {
    transition: background-color 0.2s ease;
}

.table-hover tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

.badge {
    font-weight: 500;
    padding: 0.35em 0.65em;
}

.alert {
    border: none;
    border-radius: 0.5rem;
}

.list-group-item {
    border-left: none;
    border-right: none;
    transition: background-color 0.2s ease;
}

.list-group-item:hover {
    background-color: rgba(13, 110, 253, 0.03);
}

.modal-content {
    border-radius: 1rem;
    border: none;
}

.modal-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.modal-footer {
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.navbar {
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-size: 1.25rem;
}

.rounded-4 {
    border-radius: 1rem !important;
}

@media (max-width: 768px) {
    .sidebar {
        position: relative;
        width: 100% !important;
        height: auto;
    }

    .d-flex {
        flex-direction: column;
    }

    .card-body {
        padding: 1rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .table-responsive {
        font-size: 0.875rem;
    }
}

.bg-light {
    background-color: #f8f9fa !important;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

.shadow-lg {
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}

.text-muted {
    color: #6c757d !important;
}

.fw-bold {
    font-weight: 700 !important;
}

.fw-semibold {
    font-weight: 600 !important;
}

.min-vh-100 {
    min-height: 100vh;
}

.py-5 {
    padding-top: 3rem !important;
    padding-bottom: 3rem !important;
}