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

.center{
    text-align: center;
}
.block{
    display: block;
    margin-right: auto;
    margin-left: auto;
}
section{
    display: block;
    margin-right: auto;
    margin-left: auto;
    padding: 1rem;
    max-width: 600px;
}
.green{
    color: #34dd82;
}
.btn{
    background-color: #34dd82;
    color: #fff;
    width: 12rem;
    text-decoration: none;
    font-size: large;
    border-radius: .3rem;
    padding: 1rem;
}
.flex{
    display: flex;
}
.split{
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5rem;
}
.black{
    padding: 1rem;
    background-color: #000;
    color: #fff;
}






@media screen and (max-width: 700px) { .split{flex-direction: column;}}