style.css

h1 {
    margin: 0;
    padding-top: 30px;
    text-align: center;
    font-size: 40px;
    color: #939393;
    font-family: 'Rock Salt', cursive;
    text-shadow: 1px 2px #9B9B9B;
    padding-bottom: 25px;
}

#message {
    position: relative;
    text-align: center;
    color: #939393;
    font-size: 25px;
    font-family: 'Abel', sans-serif;
    margin: 0;
    display: none;
}

body {
    margin: 0;
    width: 100%;
    height: 100%;
    border: 0;
    overflow: hidden;
    display: block;
    font-family: Verdana;
    background-color: #FFFFFF;
}

td {
    font-family: cursive;
    border: 1px dashed #E5ECE9;
    height: 150px;
    width: 150px;
    margin-right: 10px;
    text-align: center;
    font-size: 90px;
    vertical-align: middle;
}

table {
    margin-left: auto;
    margin-right: auto;
    border-collapse: collapse;
    border-spacing: 10px;
    color: #E5ECE9;
    margin-top: 15px;
    display:none;
}

#gameBoard {
    background: #0D1F22;
    opacity: 0.8;
    margin-top: 0;
}

#cell-0 {
    border-top: none;
    border-left: none;
}

#cell-1 {
    border-top: none;
}

#cell-2 {
    border-top: none;
    border-right: none;
}

#cell-3 {
    border-left: none;
}

#cell-4 {
    border-right: none;
}

#cell-5 {
    border-bottom: none;
}

#cell-6 {
    border-bottom: none;
}

#cell-7 {
    border-right: none;
    border-bottom: none;
}

#messageoverlay {
    display: none;
    opacity: 0.5;
    position: fixed;
    top: 0px;
    left: 0px;
    background: #ffffff;
    width: 100%;
    height: 100%;
    z-index: 10;
}

#messagebox {
    display: none;
    position: fixed;
    background: #747474;
    width: 550px;
    z-index: 20;
    opacity: 1;
    margin-top: 100px;
    padding: 10px;
    border-radius: 10px;
}

#messagebox > div > #messageboxhead {
    background: #939393;
    font-size: 19px;
    padding:10px;
    color: #ffffff;
    text-align: center;
    font-size: 22px;
}

#messagebox > div > #messageboxbody {
    background: #747474;
    padding: 20px;
    color: #ffffff;
    text-align: center;
}

#messagebox > div > #messageboxfoot {
    background: #939393;
    padding: 10px;
    text-align: center;
}

#messagebox > div > #messageboxfoot > button {
    background-color: #595959;
    color: #ffffff;
    padding: 5px 22px;
    border-radius: 12px;
    font-size: 14px;
}

#start-menu {
    height: 160px;
    width: 100%;
    display: block;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    font-size: 43px;
    padding-top: 0;
    font-family: "Abel", sans-serif;
    color: #E5ECE9;
    background-color: #0D1F22;
    opacity: 0.8;
    border: 1px dashed #E5ECE9;
}

#start-menu > h4 {
    margin-top: 28px;
    margin-bottom: auto;
}

#buttons {
    margin-top: -9px;
}

#pX, #pO {
    background-color: #595959;
    color: #ffffff;
    padding: 5px 22px;
    border-radius: 12px;
    font-size: 13px;
    transition: all 0.5s ease-in-out;
}

#pX:hover {
    padding: 9px 22px;
    transform: scale(1,1);
}

#pO:hover {
    padding: 9px 22px;
    transform: scale(1,1);
}