body {
    margin: 0;
    padding: 0;
    background-color: rgba(0, 0, 0, .5);
    -webkit-user-select: none;
}

.wrapper {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 375px;
    height: 667px;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    background-color: #fff;
    overflow: hidden;
}

.model {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 147px;
    left: 0;
}

.model-set {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    border-top: 1px solid rgba(0, 0, 0, .5);
}

.model-set .btn-group {
    float: left;
    width: 100%;
    margin: 5px 0;
    text-align: center;
    white-space: nowrap;
}

.model-set .btn-group .text {
    font-size: 18px;
    font-weight: 600;
    width: -webkit-calc(100% -20px);
    width: calc(100% -20px);
    padding-left: 20px;
    text-align: left;
    vertical-align: middle;
    color: #474443;
}

.model-set .btn-group .text > span {
    font-size: 16px;
    font-weight: normal;
    vertical-align: middle;
}

.model-set .btn-group .text > input {
    width: 80px;
    margin: 0;
    padding: 5px 0;
    border: 1px solid #eee;
    border-radius: 3px;
    outline: none;
}

.model-set .btn-group .set {
    display: inline-block;
    padding-top: 5px;
    text-align: center;
    vertical-align: middle;
}

.model-set .btn-group .set > span {
    display: inline-block;
    vertical-align: middle;
}

.model-set .btn-group .set > button {
    position: relative;
    width: 30px;
    height: 30px;
    margin-right: 5px;
    cursor: pointer;
    vertical-align: middle;
    border: 2px solid #ffbc00;
    border-radius: 3px;
    outline: none;
    background-color: #fff;
}

.model-set .btn-group .set > button.reduce:before,
.model-set .btn-group .set > button.add:before,
.model-set .btn-group .set > button.add:after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 18px;
    height: 0;
    content: '';
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    border-top: 3px solid #ffbc00;
}

.model-set .btn-group .set > button.add:after {
    width: 0;
    height: 18px;
    border-top: unset;
    border-left: 3px solid #ffbc00;
}

.parabola-test {
    font-size: 14px;
    position: absolute;
    top: 0;
    left: 0;
    width: 38px;
    height: 38px;
    cursor: pointer;
    -webkit-transition: all .3s linear;
    transition: all .3s linear;
    text-align: center;
    border-radius: 3px;
    box-shadow: inset 0 0 5px #2d82ff;
}

.parabola-test.begin {
    z-index: 2;
    top: 1%;
    left: 1%;
    color: #1ca261;
    border: 1px solid #1ca261;
}

.parabola-test.end {
    z-index: 1;
    top: 80%;
    left: 85%;
    color: #dd4e42;
    border: 1px solid #dd4e42;
}

.parabola-animation {
    width: 100%;
}

.parabola-box-hor {
    position: fixed;
    z-index: 99;
    top: 0;
    left: 0;
    -webkit-animation: parabola-hor-animation 1s ease-out 1;
    animation: parabola-hor-animation 1s ease-out 1;
}

.parabola-box-hor.top {
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
}

.parabola-box-ver {
    position: fixed;
    top: 50px;
    left: 20px;
    overflow: hidden;
    width: 35px;
    height: 35px;
    -webkit-animation: parabola-ver-animation 1s ease-in 1;
    animation: parabola-ver-animation 1s ease-in 1;
    border-radius: 50%;
}

.parabola-box-ver.top {
    -webkit-animation-timing-function: ease-out;
    animation-timing-function: ease-out;
}

.parabola-box-ver > img {
    width: 100%;
    height: 100%;
    vertical-align: middle;
}

@media screen and (max-width: 415px) {
    .wrapper {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        width: auto;
        height: auto;
        -webkit-transform: translate(0, 0);
        -ms-transform: translate(0, 0);
        transform: translate(0, 0);
    }
}