width: 33.3%
заставляет карты оставаться в одном ряду и уменьшаться. Вы можете установить значение 100% только для экрана мобильного устройства.
@media (max-width: 768px) {
.card-homework {
width: 100%;
}
}
.card__like {
width: 18px;
}
.card__clock {
width: 15px;
vertical-align: middle;
fill: #AD7D52;
}
.card__time {
font-size: 12px;
color: #AD7D52;
vertical-align: middle;
margin-left: 5px;
}
.card__clock-info {
float: right;
}
.card__img {
visibility: hidden;
background-size: cover;
background-position: center;
background-repeat: no-repeat;
width: 100%;
height: 235px;
border-top-left-radius: 12px;
border-top-right-radius: 12px;
}
.card__info-hover {
position: absolute;
padding: 16px;
width: 100%;
opacity: 0;
top: 0;
}
.card__img--hover {
transition: 0.2s all ease-out;
background-size: cover;
background-position: center;
background-repeat: no-repeat;
width: 100%;
position: absolute;
height: 235px;
border-top-left-radius: 12px;
border-top-right-radius: 12px;
top: 0;
}
.card-homework {
margin-right: 25px;
margin-bottom: 25px;
transition: all .4s cubic-bezier(0.175, 0.885, 0, 1);
background-color: var(--bg);
width: 33.3%;
position: relative;
border-radius: 12px;
overflow: hidden;
box-shadow: 0px 13px 10px -7px rgba(0, 0, 0, 0.1);
}
/* Additional code */
@media (max-width: 768px) {
.card-homework {
width: 100%;
}
}
.card-homework:hover {
box-shadow: 0px 30px 18px -8px rgba(0, 0, 0, 0.1);
transform: scale(1.10, 1.10);
}
.card__info {
z-index: 2;
background-color: var(--bg);
border-bottom-left-radius: 12px;
border-bottom-right-radius: 12px;
padding: 16px 24px 24px 24px;
}
.card__category {
font-family: 'Raleway', sans-serif;
text-transform: uppercase;
font-size: 13px;
letter-spacing: 2px;
font-weight: 500;
color: #868686;
}
.card__title {
margin-top: 5px;
color: var(--text);
margin-bottom: 10px;
font-family: 'Roboto Slab', serif;
}
.card__by {
font-size: 12px;
color: var(--text);
font-family: 'Raleway', sans-serif;
font-weight: 500;
}
.card__author {
font-weight: 600;
text-decoration: none;
color: #AD7D52;
}
.card-homework:hover .card__img--hover {
height: 100%;
opacity: 0.3;
}
.card-homework:hover .card__info {
background-color: transparent;
position: relative;
}
.card-homework:hover .card__info-hover {
opacity: 1;
}
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
<div class="col-md-6">
<div id="thisdiv" class="card">
<div style="padding-top: 2%"></div>
<div class="row col-md-12" style="padding-left: 3%">
<style>
.card--2 .card__img,
.card--2 .card__img--hover {
background-image: url('https://i.picsum.photos/id/863/500/500.jpg?hmac=k9hZck8HV2PYvXCF5AFoFSaVbSHibjhVO19llHsiaH4');
}
</style>
<article class="card-homework card--2 image-first">
<div class="card__info-hover">
<svg class="checkmark" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 52 52">
<circle class="checkmark__circle" cx="26" cy="26" r="25" fill="none" />
<path class="checkmark__check" fill="none" d="M14.1 27.2l7.1 7.2 16.7-16.8" /></svg>
</div>
<div class="card__img"></div>
<a href="http://homewrk.test/homework/view/2" class="card_link">
<div class="card__img--hover"></div>
</a>
<div class="card__info">
<span class="card__category">Homework</span>
<h3 class="card__title">Test</h3>
<span class="card__by">deadline: <a href="#" class="card__author" title="author">20-06-2020</a></span>
</div>
</article>
<style>
.card--1 .card__img,
.card--1 .card__img--hover {
background-image: url('https://i.picsum.photos/id/863/500/500.jpg?hmac=k9hZck8HV2PYvXCF5AFoFSaVbSHibjhVO19llHsiaH4');
}
</style>
<article class="card-homework card--1 image-first">
<div class="card__info-hover">
<svg class="checkmark" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 52 52">
<circle class="checkmark__circle" cx="26" cy="26" r="25" fill="none" />
<path class="checkmark__check" fill="none" d="M14.1 27.2l7.1 7.2 16.7-16.8" /></svg>
</div>
<div class="card__img"></div>
<a href="http://homewrk.test/homework/view/1" class="card_link">
<div class="card__img--hover"></div>
</a>
<div class="card__info">
<span class="card__category">Homework</span>
<h3 class="card__title">test</h3>
<span class="card__by">deadline: <a href="#" class="card__author" title="author">22-06-2020</a></span>
</div>
</article>
</div>
</div>
<script type="text/javascript">
(function(undefined) {
var setTime = function() {
var date = new Date(),
MINUTE = 60,
HOUR = 60 * MINUTE,
seconds = date.getSeconds(),
minutes = (date.getMinutes() * MINUTE) + seconds,
hours = (date.getHours() * HOUR) + minutes;
document.getElementById('sekundes').setAttribute('transform', 'rotate(' + 360 * (seconds / MINUTE) + ',16,17)');
document.getElementById('minutes').setAttribute('transform', 'rotate(' + 360 * (minutes / HOUR) + ',16,17)');
document.getElementById('stundas').setAttribute('transform', 'rotate(' + 360 * (hours / (12 * HOUR)) + ',16,17)');
}
setTime();
var interval = setInterval(setTime, 1000);
})();
</script>