.ModalOverlay {
    display: -ms-flexbox;
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(55,56,58,.75);
    z-index: 9;
    overflow-y: auto;
}

.ModalContent {
    position: relative;
    margin: auto;
    border: 20px solid transparent;
    outline: none;
}

.ModalContent>div {
    background: #fff;
}

.ModalBuyToken {
    width: 729px;
}

.ModalBuyToken .title {
    display: block;
    text-align: center;
    padding: 25px 77px;
    line-height: 28px;
}

.ModalBuyToken .title h4 {
    color: #fff;
    margin-bottom: 7px;
}

.ModalBuyToken .title h4 .trademark {
    font-size: 8px;
    font-weight: 300;
}

.ModalBuyToken .main {
    padding: 19px 40px 24px;
}

.ModalBuyToken .main .scrollable-content {
    height: 175px;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 5px 10px;
    background-color: #f8f9fa;
    border: 1px solid #e8ebf0;
    margin-bottom: 21px;
}

.SectionAgreement .sections {
    color: #605c6d;
    font-size: 13px;
    margin-bottom: 30px;
}

.SectionAgreement h4 {
    margin-bottom: 10px;
    text-align: center;
}

.SectionAgreement .sections p {
    line-height: 22px;
}

.ModalBuyToken .main .row {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

.ModalBuyToken .main .token-check-condition .row>div {
    margin-bottom: 21px;
}

.col-sm-6 {
    -ms-flex: 0 0 50%;
    flex: 0 0 50%;
    max-width: 50%;
}

.ModalBuyToken .main .token-check-condition input[type=checkbox]+label {
    display: block;
    position: relative;
    cursor: pointer;
}

.ModalBuyToken .main .token-check-condition label {
    font-size: 13px;
    color: #605c6d;
}
.ModalBuyToken .main .token-check-condition input[type=checkbox]+label:before {
    content: "";
    display: block;
    float: left;
    text-align: center;
    border: 1px solid #65778d;
    background: #f8f9fa;
    border-radius: 1.5px;
    width: 16px;
    height: 16px;
    margin-right: 5px;
}
.ModalBuyToken .main .token-check-condition label span {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
<style>…</style>
.ModalBuyToken .main .token-check-condition label span {
    display: block;
    position: relative;
    top: -3px;
    line-height: 22px;
    margin-left: 25px;
}

.ModalBuyToken .main .token-check-condition input[type=checkbox]:checked+label:after {
    content: "";
    padding: 2px 1.5px;
    text-align: center;
    position: absolute;
    top: 3px;
    left: 6px;
    height: 8px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
}

.ModalContent .ButtonClose {
    position: absolute;
    top: 23px;
    right: 23px;
    display: block;
}

.ButtonClose {
    display: inline-block;
    width: 17px;
    height: 17px;
    cursor: pointer;
    background: url(/static/media/icon-close.38777293.svg) no-repeat 0 0;
}

.ButtonRound {
    position: relative;
    display: inline-block;
    border-radius: 2px;
    text-align: center;
    height: 48px;
    cursor: pointer;
    -webkit-transition: all .13s linear;
    -o-transition: all .13s linear;
    transition: all .13s linear;
    background: transparent;
    font-size: 16px;
    font-weight: 500;
    background: #443f54;
}

.ButtonRound>* {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-pack: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    text-transform: uppercase;
    color: #fff;
    -webkit-transition: all .13s linear;
    -o-transition: all .13s linear;
    transition: all .13s linear;
    cursor: pointer;
    padding: 0 16px;
}


a, a:active, a:focus, a:hover, a:link, a:visited {
    text-decoration: none;
}

.ModalBuyToken .main .token-check-condition .ButtonRound {
    width: 130px;
}

.ModalBuyToken .main .token-check-condition .ButtonRound {
    display: block;
    margin: 0 auto;
}

.ButtonRound.disabled, .ButtonRound.loading {
    cursor: not-allowed;
    border: 2px solid #a4a4a4;
    background: #fff;
    -webkit-tap-highlight-color: transparent;
}