style.css

body {
    background: #132535;
    color: #ebeff0;
    font-family: 'Open Sans', sans-serif; /*Explain how all/most "children" elements inside of this one will "inherit" these styles and use the same font/color/font-size*/

    /*Don't change padding/margin to 0 until styling the nav menu, to show why they're needed*/
    padding: 0;
    margin: 0;
}

html {
    scroll-behavior: smooth; /*Don't add until the end when talking about cool CSS stuff we didn't cover*/
}

/*Don't add this main part (HTML or CSS) either, until towards the end when we want to do one quick fix so that the page is readable on large things*/
main {
    margin: 0 auto; /*Note that this is a quick trick to get things centered*/
    padding: 1em;
    width: 100%;
    max-width: 850px;
}

h1, h2, h3 {
    font-size: 3em;
    margin: 10px 0;
}
h1 {
    font-size: 4em;
    text-align: center;
}
h2 {
    font-size: 3em;
}
h3 {
    font-size: 2em;
}

a {
    text-decoration: none;
    color: #105a9d;
}
a:hover {
    text-decoration: underline;
    /*Emphasize this is a normal CSS block and we could've done absolutely anything here we wanted*/
}

/*Make styling the navigation the first big piece we style (probably give its own video section?); introduce margin/padding, width/height, and flex-box basics here*/

#navigation {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    width: 100%;
    height: 80px;
    margin: 0;
    padding: 0;
    background: #105a9d;
}
#navigation li {
    height: 100%;
    width: 100%;
    list-style: none;
}
#navigation li a {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    padding: 0 5px;
    color: #ebeff0;
    height: 100%;
}
#navigation li a:hover {
    background: #ebeff0;
    color: #105a9d;
    text-decoration: none;
}

/*Next up, focus on making the image grid, introducing classes*/
.image-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}
.image-grid img {
    height: 300px;
    border: solid 1px white; /*Introduce borders to separate images*/
}

.hot-text {
    padding: 2px;
    color: lightcoral;
    background: lightyellow;
    border-radius: 5px;
}
.cold-text {
    padding: 2px;
    color: aquamarine;
    background: lightskyblue;
    border-radius: 5px;
}

/*Finally, style the dojo; first, set up the dojo, then turn David to face the right way, then finally style the button (even using a kung-fu font)*/
#david-dojo-arena {
    /*Need to set container position as absolute so child positioning works*/
    position: absolute;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    width: 500px;
    height: 300px;
    background: white;
    border: solid 10px #2a3b6a;
    border-radius: 5px;
}

#david-dojo-david {
    position: absolute;
    transform: scaleX(-1); /*Use a trick that scaling by a negative is the same thing as flipping (if you've taken linear algebra, you should know this, and shame on you for forgetting)*/
}
#david-dojo-opponent {
    position: absolute;
    left: 400px;
}

#david-dojo-fight {
    /*Look on Google Fonts for a Karate looking font*/
    font-family: "Permanent Marker", cursive;
    margin: 0;
    padding: 5px;
    font-size: 2em;
    color: inherit;
    background: red;
    border: none;
}
#david-dojo-fight:hover {
    padding: 10px;
    background: url("img/david_karate.PNG");
    background-size: cover; /*Note background is way too zoomed in at first, but we can adjust that with this setting*/
}