#protein-calculator {
    max-width: 950px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 20px;
    border: 1px solid #ccc;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

#protein-calculator .form-section-3 {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

#protein-calculator .form-column {
    flex: 1 1 calc(50% - 10px);
    margin-bottom: 20px;
    padding-right: 10px;
    box-sizing: border-box;
}

#protein-calculator .form-column:last-child {
    padding-right: 0;
}

#protein-calculator .form-label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
    font-size: 16px;
}

#protein-calculator input[type="number"],
#protein-calculator input[type="text"] {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
    margin-top: 5px;
}

#protein-calculator .form-question {
    margin-bottom: 20px;
}

.radio-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin-right: 20px;
}

.radio-label input {
    margin-right: 10px;
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.button-option {
    flex: 1 1 calc(33.333% - 10px);
    padding: 10px;
    background-color: #f9f9f9;
    border: 2px solid #ccc;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}

.button-option:hover,
.button-option.selected {
    background-color: #EB5A51;
    border-color: #EB5A51;
    color: #fff;
}

.submit-button-container {
    text-align: center;
    margin-top: 20px;
}

#protein-calculator button[type="submit"] {
    padding: 12px 20px;
    background-color: #EB5A51;
    color: #fff;
    font-size: 18px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#protein-calculator button[type="submit"]:hover {
    background-color: #d14a48;
}

#protein-result {
    display: none;
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #EB5A51;
    border-radius: 10px;
    background-color: #fff8f8;
    color: #333;
    font-size: 16px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .button-option {
        flex: 1 1 100%;
    }

    #protein-calculator .form-column {
        flex: 1 1 100%;
        padding-right: 0;
    }

    .radio-options {
        flex-direction: column;
    }
}