styles.css

html {
    box-sizing: border-box;
}

/* The Universal Selector */
*, /* All elements*/
*::before,  /* All ::before pseudo-elements */
*::after {  /* All ::after pseudo-elements */
            /* height & width will now include border & padding by default but can be over-ridden as needed */
    box-sizing: inherit;
}

/* Pseudo-classes for hyperlink colors */
a:link    {color: #a3a3a3;}    /* custom color for un-clicked links */
a:visited {color: #a3a3a3;}    /* custom color for clicked links */
a:hover   {color: #e6e6e6;}    /* custom color for links when hovered over */
a:active  {color: #e6e6e6;}    /* custom color for links being actively clicked */

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #343a40;
    font-family: sans-serif;
    overflow: auto;
}

header {
    height: 100px;
    width: 100%;
    font-size: 18px;
    text-align: center;
    letter-spacing: 8px;
    color: #C0C0C0;
}

h1 {
    font-size: 60px;
    font-family: 'RocknRoll One', sans-serif;
    margin: 5px auto 0 auto;
}

main {
    display: flex;
    flex-direction: column;
    text-align: center;
    width: 500px;
    margin-bottom: 15px;
}

#game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    grid-template-areas:
        'grid-box-1 | grid-box-2 | grid-box-3'
        'grid-box-4 | grid-box-5 | grid-box-6'
        'grid-box-7 | grid-box-8 | grid-box-9';
    gap: 5px;
    min-height: 500px;
}

#outcome {
    margin: 15px 0 20px 0;
    border-radius: 10px;
    background-color: #ced4da;
    height: 100px;
    font-family: 'RocknRoll One', sans-serif;
    font-size: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#restart-box {
    display: flex;
    align-self: center;
    align-items: center;
    justify-content: center;
    color: #C0C0C0;
    border: 3px solid #C0C0C0;
    border-radius: 14px;
    height: 60px;
    width: 225px;
}

h2 {
    font-family: 'RocknRoll One', sans-serif;
    font-size: 22px;
}

.outcome-text {
    font-size: 35px;
}

.game-box {
    align-self: center;
    justify-self: center;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Comic Neue', cursive;
    font-size: 125px;
    width: 150px;
    height: 150px;
    border-radius: 10%;
    background-color: #CED4DA;
}

.unclaimed-box:hover {
    background-color: orange;
}

.win-background {
    background-color: #ccff33 !important;
}

footer {
    bottom: 0;
    margin-top: auto;
    padding-top: 5px;
    height: 60px;
    width: 100%;
    font-size: 18px;
    text-align: center;
    letter-spacing: 2px;
    color: #C0C0C0;
}

/* breakpoint to resize footer for smaller screens */
@media only screen and (max-width: 500px) {
    footer {
        height: 55px;
        font-size: 14px;
    }

    .footer-link {
        font-size: 12px;
    }
}