* {
    box-sizing: border-box;
    outline: none;
}

html {
    height: 100%;
    font-size: 10px;
}

a,
button {
    transition: all .25s ease-in-out;
    text-decoration: none;
}

body {
    font-size: 2rem;
    font-family: sans-serif;
}

.modal {
    opacity: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    padding: 30px;
    border: 1px solid #444;
    border-radius: 10px;
    transition: all .5s ease-in-out;
}
.modal.opened{
    opacity: 1;
    z-index: 1;
    transition: all .5s ease-in-out;
}

.modal__content{
    text-align: center;
    font-size: 1.6rem;
}

.modal__footer{
    text-align: center;
    margin-top: 1rem;
}