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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    min-height: 100vh;
}

.card {
    border: none;
    border-radius: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn {
    border-radius: 6px;
    padding: 8px 16px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.form-control, .form-select {
    border-radius: 6px;
    border: 1px solid #dee2e6;
    padding: 10px 14px;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

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

.badge {
    padding: 6px 12px;
    font-weight: 500;
    border-radius: 20px;
}

.timeline .card {
    border-left: 4px solid var(--primary-color);
}

h1, h2, h3, h4, h5, h6 {
    color: #2c3e50;
    font-weight: 600;
}

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

.shadow {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08) !important;
}

.shadow-sm {
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06) !important;
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}