style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@300&display=swap');
:root {
    background-color: rgba(7, 31, 75, 0.884);
    background-position: center;
}

*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: "Roboto", sans-serif;
    font-size: 60%;
}

h1{
    color: white;
    margin-bottom: 5rem;
    font-size: 5rem;
}

h2{
    font-size: 4.4rem;
    margin-bottom: 4rem;
}

.container{
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 80rem;
    margin: 0 auto;
    padding: 2rem;
}

.flex-center {
    justify-content: center;
    align-items: center;
    text-shadow: 0 0 10px #043f4e, 0 0 5px #7bb5cc;
}

.flex-column{
    display: flex;
    flex-direction: column;
}

.text-center{
    text-align: center;
}

.hidden{
    display: none;

}
.justify-center{
    justify-content: center;
}

/* Now, Time for Making The Buttons Larger and beautiful */

.btn{
    font-size: 2.5rem;
    padding: 2rem 0;
    width: 30rem;
    text-align: center;
    margin-bottom: 1rem;
    text-decoration: none;
    color: whitesmoke;
    background: linear-gradient(90deg, rgb(85, 160, 204) 0%, rgb(62, 159, 172) 100%);
    border-radius: 4px;
}
/* Now they look cool, time for adding a hover effect */
.btn:hover{
    cursor: pointer;
    box-shadow: 0 0.4rem 1.4rem 0 rgba(169, 237, 240, 0.6);
    transition: transform 150ms;
    transform: scale(1.03);
}

.btn[disabled]:hover{
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

#highscore-btn {
    background: linear-gradient(90deg, rgb(174, 218, 116) 0% , rgb(131, 214, 53) 100%);
    color: black;
}

#highscore-btn:hover {
    box-shadow: 0 0.4rem 1.4rem 0 rgba(190, 235, 118, 0,966);
}

.fa-crown {
    font-size: 2.5rem;
    margin-left: 1rem;
}
 /*  The code of the files will be attached to the description box below. You can download or view the code if you want */