style.css

/* Importing the google font family  */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300..800;1,300..800&display=swap');

/* Header and some General CSS code */
/* ===========================*/
body{
    margin: 0;
    font-family: 'sans-serif open sans-serif';
    color: rgb(44, 41, 44);
    background-color: rgb(247, 239, 247);
}

#main-header{
    background-color: rgb(140, 0, 255);
    color: white;
    padding: 2rem 5%;
    text-align: center;
}

.btn{
    font: inherit;
    padding: 0.5rem 1.5rem;
    background-color: rgb(140, 0, 255);
    border: 1px solid rgb(140, 0, 255);
    color: white;
    border-radius: 4px;
    cursor: pointer;
}

.btn-alt{
    background-color: transparent;
    border-color: transparent;
    color: rgb(140, 0, 255);
}

.btn:hover{
    background-color: rgb(79, 10, 190);
    border-color: rgb(79, 10, 190);;
}

.btn-alt:hover{
    background-color: rgb(230, 201, 252);
    background-color: transparent;
}

/* Overlay or model section CSS code  */
/* ==============================*/
.model {
    position: fixed;
    top: 20%;
    right: 5%;
    width: 90%;
    background-color: white;
    padding: 1rem;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0, 0.2);
    text-align: center;
    display: none;
}

.form-control label{
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-control input{
    font: inherit;
    width: 15rem;
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
    border: 1px solid rgb(204,204,204);
}


#backdrop{
    background-color: rgba(0,0,0, 0.2);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
}

.error label{
    color: rgb(136, 2, 2);     
}

.error input{
    border-color: red;
    color: red;
    background-color: rgb(253, 219, 219);
}

/* #input-error-msg{
    color: red;
} */

@media (min-width: 48rem) {
    .model {
        left: calc(33% - 20px);
        width: 40rem;
    }
}

/* Game configurations section CSS code  */
/* ================================*/
#game-configuration{
    width: 90%;
    text-align: center;
    max-width: 40rem;
    margin: 3rem auto;
}

#game-configuration ol{
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
}

#game-configuration li {
    margin: 1rem;
    padding: 1rem;
    width: 50%;
    background-color: rgb(243, 227, 255);
    border-radius: 4px;
    box-shadow: 10px 10px 20px rgba(0, 0, 0, 0.2);
}

#game-configuration h2{
    font-size: 1rem;
    margin: 0.5rem 0;
}

#game-configuration h3{
    font-size: 1.5rem;
    margin: 0.5rem 0;
    color: rgb(94, 4, 168);
}

#game-configuration p{
    font-size: 1.5rem;
    font-weight: bold;
    color: rgb(47, 4, 82);
    margin: 0.5rem 0;
}

/* Active or Game section CSS Code  */
/* ==============================*/
#active-game{
    text-align: center;
    margin: 2rem 0 5rem 0;
    display: none;
}

#game-over{
    width: 90%;
    max-width: 40rem;
    margin: auto;
    padding: 1rem 2rem;
    background-color: rgb(50, 5, 87);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    display: none;
}

#game-over h2{
    font-size: 2.5rem;
    margin: 0.5rem 0;
}

#active-payer-name{
    font-weight:bold;
    color: rgb(50, 5, 87);
}

#game-board{
    list-style: none;
    margin: 1rem 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, 6rem); /* 6rem 6rem 6rem */
    grid-template-rows: repeat(3, 6rem);
    justify-content: center;
    gap: 0.5rem;
}

#game-board li{
    background-color: rgb(215, 187, 247);
    border-radius: 2px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    font-weight: bold;
}

#game-board li:hover{
    background-color: rgb(112, 13, 204);
}

#game-board li.disabled{
    background-color: rgb(112, 13, 204);
    color: rgb(255, 255, 255);
    cursor: default;
}