styles.css

* {
    box-sizing: border-box;
}

h1::selection {
    color: #1B244A;
    background-color: #FFFFFF;
}

.scoreboard::selection {
    color: #080001;
    background-color: #F94F6D;
}

body {
    background: #1B244A;
    font-family: Orbitron, sans-serif;
    color: #FFFFFF; 
    margin: 7.5rem 0;
}

main {
    display: flex;
    flex-flow: column nowrap;
    align-items: center;
    text-align: center;
}

button {
    font-family: Orbitron, sans-serif;
    background-color: #1B244A;
    border: 2px solid #9AABD8;
    border-radius: 4px;
}

.scoreboards {
    display: flex;
    flex-flow: row wrap;
    gap: 6rem;
    justify-content: center;
}

h1 {
    font-family: Orbitron, sans-serif;
    font-size: 2.75rem;
}

.scoreboard {
    font-size: 5rem;
    background-color: #080001;
    color: #F94F6D;
    border-radius: 4px;
    padding: 2rem 4rem;
}

.score-btns {
    display: flex;
    flex-flow: row nowrap;
    gap: 12px;
}

button:not(.new-game-btn) {
    margin-top: 1rem;
    font-size: 1.75rem;
    width: 5rem;
    height: 3rem;
    color: #9AABD8;
}

.new-game-btn {
    margin-top: -3rem;
    color: #FFFFFF;
    font-size: 1.5rem;
    width: 72%;
    font-weight: 900;
}

button:hover {
    transition: border 0.3s ease-in-out, background-color 0.5s ease-in-out;
    cursor: pointer;
    border: 4px solid #B9C9F5;
    background-color: #2C355B;
}

button:active {
    transition: box-shadow 0.1s ease-in-out;
    box-shadow: 0 0 0 2px #2470D6;
}