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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #222;
}

.vertical-slider {
    width: 400px;
    height: 400px;
    /* background: lightblue; */
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    justify-content: center;
    align-items: center;
}
.vertical-slider p {
    position: absolute;
    transform: translateY(100px);
    opacity: 0;
    visibility: hidden;
    font-size: 70px;
    text-align: center;
    width: 100%;
    color: #f1f1f1;
}