master.css

html {
    background-color: #F0F0F0;
}

body {
    margin: 0 auto;
    width: 800px;
    color: #5f5f5f;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

h1 {
    margin: 0px 0px 10px 0px;
    border-bottom: 2px solid #d35400;
    font-size: 4em;
    text-shadow: 2px 2px 2px #817d7d;
}

.createdBy {
    top: 0px;
    color: white;
    float: right;
    padding: 5px 10px;
    font-size: 1.2em;
    background-color: #5f5f5f;
    border-radius: 0px 0px 3px 3px;
    text-decoration: none;
}

.createdBy:hover {
    background-color: #d35400;
}

.tooltip {
    position: relative;
    float: right;
}

.tooltip .tooltiptext {
    /* text */
    visibility: hidden;
    font-size: 0.8em;
    width: 120px;
    background-color: #5f5f5f;
    color: white;
    text-align: center;
    padding: 5px;
    border-radius: 2px;
    opacity : 0;
    
    /* position */
    z-index: 1;
    position: absolute;
    right: 5px;
    top: 35px;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    transition: opacity 2s;
    opacity: 1;
}