:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
}

body {
    font-family: 'Tahoma', Arial, sans-serif;
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 5rem 0;
    margin-bottom: 3rem;
}

.feature-card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
    height: 100%;
}

    .feature-card:hover {
        transform: translateY(-10px);
    }

.feature-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.nav-pills .nav-link.active {
    background-color: var(--secondary-color);
}

footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
    }

    .display-4 {
        font-size: 2.5rem;
    }
}

.hover-shadow {
    transition: transform 0.3s, box-shadow 0.3s;
}

    .hover-shadow:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

.hover-shadow-lg:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.btn-check:checked + .btn {
    background-color: var(--bs-primary);
    color: white;
}

.btn-check:checked + .btn-outline-success {
    background-color: var(--bs-success);
    color: white;
}