body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

header {
    background-color: #4caf50;
    color: #fff;
    padding: 20px;
    text-align: center;
}

.portfolio {
    padding: 20px;
}

.portfolio h2 {
    text-align: center;
    margin-bottom: 20px;
}

.card-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.card {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    width: 200px;
    padding: 15px;
    text-align: center;
}

.card h3 {
    background-color: #4caf50;
    color: #fff;
    margin: -15px -15px 10px -15px;
    padding: 10px;
    border-radius: 8px 8px 0 0;
}

.card p {
    text-align: justify;
    color: #333;
    font-size: 14px;
    margin: 10px 0;
    
}

.card a {
    display: inline-block;
    margin-top: 10px;
    text-decoration: none;
    color: #4caf50;
    border: 1px solid #4caf50;
    border-radius: 4px;
    padding: 5px 10px;
    transition: background-color 0.3s, color 0.3s;
    
}

.card a:hover {
    background-color: #4caf50;
    color: #fff;
    
}


@media (max-width: 768px) {
    .card-container {
        justify-content: center;
    }

    .card {
        width: 90%;
        max-width: 300px; 
    }

    header {
        padding: 15px;
    }

    .portfolio h2 {
        font-size: 1.5em; 
    }
}

@media (max-width: 480px) {
    .card {
        width: 100%; 
        padding: 10px; 
    }

    .card h3 {
        font-size: 1.2em; 
    }

    .card p {
        font-size: 12px; 
    }
}