* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #222f3e;
}

.corazon {
    position: relative;
    width: 70px;
    height: 70px;
    background-color: #ff4757;
    transform: rotate(-45deg);
    box-shadow: -10px 10px 90px #ff4757;
    animation: animate .6s linear infinite;
}

@keyframes animate{
    0%{transform: rotate(-45deg) scale(1.07);}
    80%{transform: rotate(-45deg) scale(1.0);}
    100%{transform: rotate(-45deg) scale(0.8);}
}
.corazon::before {
    content: '';
    position: absolute;
    top: -50%;
    width: 70px;
    height: 70px;
    background-color: #ff4757;
    border-radius: 50%;
    box-shadow: -10px -10px 90px #ff4757;
}

.corazon::after {
    content: '';
    position: absolute;
    right: -50%;
    width: 70px;
    height: 70px;
    background-color: #ff4757;
    border-radius: 50%;
    box-shadow: 10px 10px 90px #ff4757;
}