.tos-container {
    font-family: sans-serif;
    padding: 20px;
    max-width: 500px;
    margin: auto;
}

.row {
    margin-bottom: 10px;
}

.shape {
    display: inline-block;
    padding: 10px 20px;
    margin: 5px;
    border: 1px solid #333;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.shape:hover {
    background-color: #ddd;
}

.selected {
    background-color: #4caf50;
    color: white;
}

button#calculate {
    margin-top: 10px;
    padding: 10px 20px;
    border: none;
    background-color: #333;
    color: white;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.3s;
}

button#calculate:hover {
    background-color: #555;
}

table {
    margin-top: 20px;
    border-collapse: collapse;
    width: 100%;
}

td, th {
    border: 1px solid #333;
    padding: 5px;
    text-align: center;
}

@media (max-width: 480px) {
    .shape {
        padding: 8px 12px;
        margin: 3px;
        font-size: 14px;
    }
    button#calculate {
        width: 100%;
    }
}