.custom-checkbox {
    display: inline-block;
    position: relative;
    padding-left: 25px;
    cursor: pointer;
    font-size: 16px;
    line-height: 20px; 
}

.custom-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    width: 20px;
    background-color: #fff;
    border: 1px solid #ccc;
}

.custom-checkbox input:checked ~ .checkmark:after {
    content: "";
    position: absolute;
    display: block;
    left: 6px;
    top: 3px;
    width: 4px; 
    height: 8px; 
    border: solid #333;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.custom-checkbox:hover input ~ .checkmark {
    background-color: #f4f4f4;
}

.custom-checkbox input:focus ~ .checkmark {
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.5);
}

.custom-checkbox input:disabled ~ .checkmark {
    opacity: 0.5;
    cursor: not-allowed;
}