:root {
    --primary-color: #0066cc;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --dark-color: #343a40;
    --light-color: #f8f9fa;
}

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

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

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

.btn {
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
}

    .btn:hover {
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

.form-control {
    border-radius: 6px;
    border: 1px solid #dee2e6;
    transition: border-color 0.3s ease;
}

    .form-control:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
    }

.table {
    border-radius: 10px;
    overflow: hidden;
}

    .table thead th {
        border-top: none;
        font-weight: 600;
        text-transform: uppercase;
        font-size: 0.85rem;
        letter-spacing: 0.5px;
    }

.navbar-brand {
    font-weight: 700;
    font-size: 1.3rem;
}

.badge {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
}

.alert {
    border: none;
    border-radius: 8px;
    border-left: 4px solid;
}

.alert-success {
    border-left-color: var(--success-color);
}

.alert-danger {
    border-left-color: var(--danger-color);
}

.alert-warning {
    border-left-color: var(--warning-color);
}

.alert-info {
    border-left-color: var(--info-color);
}

.profile-avatar {
    transition: transform 0.3s ease;
}

    .profile-avatar:hover {
        transform: scale(1.05);
    }

.pagination {
    border-radius: 10px;
}

.page-link {
    border: none;
    margin: 0 2px;
    border-radius: 6px !important;
    color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.dropdown-menu {
    border: none;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.progress {
    height: 8px;
    border-radius: 10px;
}

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

@media (max-width: 768px) {
    .card-body {
        padding: 1rem;
    }

    .btn-group {
        flex-direction: column;
    }

        .btn-group .btn {
            margin-bottom: 5px;
        }
}

/* Loading spinner */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

    ::-webkit-scrollbar-thumb:hover {
        background: #555;
    }

.spinner {
    border: 2px solid #f3f3f3;
    border-top: 2px solid #ffffff;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}