.horizontal-center {
    display: flex;
    justify-content: center;
    color: green;
}

.vertical-center {
    height:100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.vertical-center div.top {
    align-self: flex-start;
}

.vertical-center div.bottom {
    align-self: flex-end;
}

body {
    margin: 0;
}

/* Tooltip container */
.tooltip {
    margin: 0 10px;
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black; /* If you want dots under the hoverable text */
}

/* Tooltip text */
.tooltip .tooltiptext {
    visibility: hidden;
    font-family: Arial, Helvetica, sans-serif;
    width: 300px;
    top: 100%;
    left: 50%;
    margin-left: -166px; /* Use half of the width (120/2 = 60), to center the tooltip */
    background-color: black;
    color: #fff;
    text-align: center;
    padding: 8px 16px;
    border-radius: 6px;

    /* Position the tooltip text - see examples below! */
    position: absolute;
    z-index: 1;
}

/* Show the tooltip text when you mouse over the tooltip container */
.tooltip:hover .tooltiptext {
    visibility: visible;
}

.examples {
    background-color: lightgray;
    padding: 8px 16px;
}

h1,h2,h3,h4,h5 {
    text-align: center;
}

textarea {
    width: 400px;
}