@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

html, body{
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    line-height: 1.5em;
    color: #333;
}

.calculator {
    width: 450px;
}

.calculator__content {
    display: block;
    padding: 20px 20px;
    border: 1px solid #d6d6d6;
}

.calculator__title {
    font-weight: bold;
}

.calculator__subtitle {
    color: gray;
    margin-bottom: 20px;
}

.calculator__footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.calculator__sale {
    font-size: 15px;
    color: #2a9012;
    margin-bottom: 6px;
}

.form-group-row {
    display: flex;
    justify-content: space-between;
}

.form-group-row .form-group {
    flex-basis: 0;
    flex-grow: 1;
}

.form-group-row .form-group:not(:last-child) {
    margin-right: 10px;
}

.form-group {
    width: 100%;
    margin-bottom: 15px;
}

.form-control {
    display: block;
    padding: .575rem .75rem;
    font-size: 14px;
    font-weight: 300;
    width: 100%;
    border: 1px solid #d6d6d6;
    outline: 0;
    color: #333;
    box-sizing: border-box;
}

select.form-control {
    -moz-appearance: none;
    -webkit-appearance: none;
    appearance: none;
    background: url(https://kopirka.ru/wa-data/public/site/oldimg/chevron-down-solid.svg) no-repeat;
    background-size: 12px;
    background-position: 97%;
    padding-right: 32px;
}

.form-check {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 25px;
}

.form-check-input {
    position: absolute;
    pointer-events: none;
    opacity: 0;
    left: 0;
}

.form-check-label {
    margin: 0;
    position: relative;
    padding: 1px 0;
}

.form-check-input:checked~.form-check-label::before {
    color: #fff;
    border-color: #4f9244;
    background-color: #61b054;
}

.form-check-label::before {
    transition: background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.form-check-label::after, .form-check-label::before {
    position: absolute;
    left: -25px;
    display: block;
    width: 18px;
    height: 18px;
    content: "";
    top: 0;
}

.form-check-input:checked ~ .form-check-label::after {
    background-image: url(https://kopirka.ru/wa-data/public/site/oldimg/check-solid-white.svg);
    background-size: 12px;
    padding: 1px;
}

.form-check-label::after {
    background: no-repeat 50%/50% 50%;
}

.form-check-label::before {
    pointer-events: none;
    background-color: #fff;
    border: #d6d6d6 solid 1px;
}

.btn {
    border: 0;
    padding: 10px 30px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color .2s linear;
    text-decoration: none;
}

.btn-success {
    background-color: #61b054;
    color: white;
}

.btn-success:hover {
    background-color: #61b054e3;
}