accordion-js/accordion-native-js/css/style.css

/* Fade In Animation */
.fadein {
    -webkit-animation: fadein 1s; /* Safari, Chrome and Opera > 12.1 */
       -moz-animation: fadein 1s; /* Firefox < 16 */
        -ms-animation: fadein 1s; /* Internet Explorer */
         -o-animation: fadein 1s; /* Opera < 12.1 */
            animation: fadein 1s;
}
@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}
body {
    font-family: 'Roboto';
}
.container {
    max-width: 690px;
    margin-right: auto;
    margin-left: auto;
}
.tabs-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    justify-content: center;
}
.tab {
    height: 55px;
    background-color: #fff;
    border: 1px solid #C7C7C7;
    border-radius: 3px;
    margin-top: 10px;
    padding-left: 27px;
    cursor: pointer;
    transition: all 0.1s;
}
.tab-wrap {
    transition: all 0.2s;
}
.tab:hover {
    background-color: #f1f1f1;
}
.tab span {
    top: 17px;
    position: relative;
    display: block;
}
.tab span::after {
    background-image: url(../img/arrow.svg);
    background-repeat: no-repeat;
    display: block;
    content: '';
    height: 30px;
    width: 30px;
    position: absolute;
    right: 20px;
    top: 0;
    z-index: 999;
    transition: all 0.2s;
}
.tab-active .tab span::after {
    transform: rotate(180deg);
}
.tab-content {
    min-height: 175px;
    width: 99%;
    margin: 0 auto;
    background-color: #F4F4F4;
    border: 1px solid #C7C7C7;
    display: block;
    padding-top: 26px;
    font-size: 14px;
    display: none;
}
.tab-content p {
    padding-left: 20px;
    padding-right: 20px;
}