body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    padding: 0;
    background-color: #f8f8f8;
    font-family: Arial, sans-serif;
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid #ddd;
    padding: 20px;
    border-radius: 5px;
    background-color: #fff;
}

.section {
    text-align: center;
    padding: 20px;
}

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

.checkbox-container div {
    display: flex;
    align-items: center;
    margin: 10px;
}

/* Custom checkbox */
.custom-checkbox {
    position: relative;
    padding-left: 35px; /* to ensure that the text doesn't overlap the checkbox */
}

.custom-checkbox input[type="checkbox"] {
    display: none; /* hide the default checkbox */
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 25px;
    width: 25px;
    background-color: #eee;
    border-radius: 4px;
}

.custom-checkbox:hover .checkmark {
    background-color: #ccc;
}

.custom-checkbox input:checked ~ .checkmark {
    background-color: #2196F3;
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.custom-checkbox input:checked ~ .checkmark:after {
    display: block;
}

.custom-checkbox .checkmark:after {
    left: 9px;
    top: 5px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 3px 3px 0;
    transform: rotate(45deg);
}

/* Output fields */
.output {
    display: none;
    /* Other styles for the output fields... */
}   

/* Add border when checkbox is checked */
.custom-checkbox input:checked ~ .checkmark {
    border: 2px solid #2196F3;
    padding: 2px;
}