/* Navigation Card System */

.nav-cards {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px auto;
    max-width: 900px;
    padding: 0 10px;
}

.nav-card {
    text-decoration: none;
    color: inherit;
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    min-width: 150px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.nav-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    border-color: #4285f4;
}

.nav-card.active {
    background: #4285f4;
    color: white;
    border-color: #4285f4;
    box-shadow: 0 4px 16px rgba(66, 133, 244, 0.3);
}

.nav-card-content h3 {
    margin: 0 0 8px 0;
    font-size: 1.2em;
    font-weight: bold;
}

.nav-card-content p {
    margin: 0;
    font-size: 0.9em;
    opacity: 0.8;
}

.nav-card.active .nav-card-content p {
    opacity: 0.9;
}

/* Main content wrapper */
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 10px;
}

/* Responsive design for navigation */
@media screen and (max-width: 768px) {
    .nav-cards {
        flex-direction: column;
        align-items: center;
        gap: 15px;
        margin: 15px auto;
    }
    
    .nav-card {
        width: 100%;
        max-width: 300px;
        padding: 16px;
    }
    
    .nav-card-content h3 {
        font-size: 1.1em;
    }
    
    .nav-card-content p {
        font-size: 0.85em;
    }
}

@media screen and (max-width: 480px) {
    .nav-cards {
        margin: 10px auto;
        gap: 12px;
    }
    
    .nav-card {
        padding: 14px;
        min-width: 120px;
    }
    
    .nav-card-content h3 {
        font-size: 1em;
    }
    
    .nav-card-content p {
        font-size: 0.8em;
    }
}