.button-container a, .button-container a:visited {
    background-color: #777;
    color: #fff;
    text-decoration: none;
    display: inline-block;
    padding: 5px 10px;
    font-size: 1.2em;
    border-radius: 5px;
    transition: background-color 0.3s;
    margin: 0 10px 10px 0;
}
.button-container a:hover {
    background-color: #555;
    color: #fff;
}
.button-container a:active, .button-container a:focus {
    background-color: #444;
    outline: none;
}
.big {
    font-size: 1.3em;
    line-height: 1.4;
}
.small {
    font-size: 0.85em;
    line-height: 1.4;
}