stylesheet.css

body{
    margin: 0;
    padding: 0;
    background-repeat: no-repeat;
    background-size: cover;
}
#mainBox {
    height: 450px;
    width: 450px;
    border-width: 2px;
    border-style: solid;
    border-color:black;
    background-color: black;
}
input {
    height: 150px;
    width:150px;
    background-color: beige;
    float: left;
    text-align: center;
    font-size: 50px;
    color: black;
    border-color: black;
}
input:hover {
    background-color:#d6d6d6;
}
button {
    width: 100px;
    height: 60px;
    color: white;
    border: 2px solid black;
    background-color: red;
    font-size: 20px;
    border-radius: 10%;
}
button:hover {
    background-color: #f71e1e;
    border: 4px solid black;
}
#playerX {
    height: 25px;
    width: 100px;
    text-align: center;
    font-size: 20px;
    display: inline-block;
    margin-right: 40px;
    margin-bottom: 20px;   
}
#playerO {
    height: 25px;
    width: 100px;
    text-align: center;
    font-size: 20px;
    display: inline-block;  
    margin-bottom: 20px;   
}
#text {
    display: inline-block;
    margin-right: 20px;
    font-size: 25px;
}