body {
    font-family: sans-serif;
    color: #2E2E2E;
    font-size: 16px;
}

.container  {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 15px;

}

h1 {
    font-size: 48px;
}

h2 {
    font-size: 24px;
    text-transform: uppercase;
}

h3 {
    font-size: 20px;
    text-transform: uppercase;
    text-align: center;
}

.calc-title {
    margin: 50px 0;
}

.calc-form__row {
    display: flex;
}

.calc-form__select {
    height: 40px;
    border-radius: 10px;
    border: 1px solid #999;
    text-indent: 15px;
    font-size: inherit;
}

.calc-form__item {
    margin: 15px 0;
}

.item__title {
    margin-bottom: 10px;
}

.calc-form__inp {
    border: 1px solid #ced4d5;
    max-width: 95px;
    border-radius: 3px;
    height: 40px;
    padding: 0 10px;
}

input[type="radio"], input[type="checkbox"] {
    opacity: 0;
    width: 1;
    height: 1;
    position: absolute;
    z-index: -1;
}


.calc-form__quality label {
    display: inline-block;
    width: 95px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid #999;
    cursor: pointer;
    text-align: center;
    overflow: hidden;
}

.calc-form__quality label span {
    display: block;
    width: 100%;
    height: 100%;
    line-height: 40px;
}


.calc-form__quality input:checked ~ span {
    background: #0287C5;
    color: #fff;
}

.calc-form__col_left {
    margin-right: 150px;
}

.calc-form__checkbox label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.calc-form__checkbox .round{
    display: inline-block;
    width: 18px;
    height: 18px;
    min-width: 18px;
    border-radius: 50%;
    margin-right: 15px;
    background: #dee2e6;
}

.calc-form__checkbox input:checked ~ .round {
    background: #0287C5;
}

.calc-form__res {
    display: none;
    max-width: 600px;
    margin: 40px auto 0 auto;
    padding-bottom: 500px;
}

.calc-form__res.show {
    display: block;
} 

.calc-form__res p {
    margin: 15px 0;
}

.send-inputs {
    display: none;
}

.send-inputs.show {
    display: block;
}

.send-input{
    display: block;
    width: 100%;
    height: 40px;
    padding: 0 15px;
    border: 1px solid #ced4d5;
    border-radius: 3px;
    margin-bottom: 15px;
}


.show-btn, .send-btn {
    display: inline-block;
    background-color: #0287C5;
    color: #fff;
    text-transform: uppercase;
    border: none;
    font-size: 22px;
    height: 40px;
    line-height: 40px;
    padding: 0 50px;
    cursor: pointer;
}

.show-btn.hide {
    display: none;
}

.send-btn {

}

.hidden {
    opacity: 0;
    width: 1px;
    position: absolute;
}

.overlay {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    display: none;
}

.popup {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    max-width: 300px;
    padding: 30px;
    display: none;
    z-index: 2;
}

.popup h3 {
    margin-bottom: 30px;
}

.popup p {
    line-height: 1.4;
}

.overlay._active {
    display: block;
}

.popup._active {
    display: block;
}

@media(max-width: 840px){
    .calc-form__col_left {
        margin-right: 50px;
    }
}

@media(max-width: 680px) {
    .calc-form__row {
        flex-direction: column;
    }
}