* {
    margin: 0; padding: 0; border: 0; box-sizing: border-box;
}

html, :root {
    font-size: 62.5%; /* 10/16 16px is the default font size */
}

body {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 1.4rem; /* 1 rem is = to 10px, 1.5rem = 15px; 3rem = 30px; */
    background-color: #222;
    color: #eee;
    min-height: 100vh;
    border: 4px solid orangered;
}

#disc {
    width: 20rem; height: 20rem;
    background-image: linear-gradient(45deg, #141, #363);
    border-radius: 50%;
    text-align: center;
    line-height: 20rem;
    font-size: 8rem;
    font-weight: bold;
    color: #fafdfd;
    position: absolute; /* being specific on location */
    top: 2rem; right: 2rem; 
}

h1 {
    margin: 12px;
    width: calc(100% - 25rem);
    font-weight: normal;
    line-height: 1.4;
    font-size: 4rem;
}

h1 strong {
    color: orangered;
}


article {
    background-image: linear-gradient(90deg, gray , #2c2c2c 70%);
    margin: 2rem;
    padding: 12px;
}
h2 {
    text-align: center;
    border-bottom: 3px solid white;
    padding: 8px;
    font-weight: normal;
    text-transform: lowercase;
    letter-spacing: .8rem;
    font-size: 2.5rem;
    margin-bottom: 12px;
}


article h3, article div {
    border: 8px solid rgb(0, 255, 115);
    width: 15vw;
    aspect-ratio: 1/1; /* keeps things square */
}

section {
    position: relative;
}

#display1 {
    text-align: center;
    border: 2px solid rgb(5, 237, 245);
    height: 250px;
    margin-bottom: 12px;
}

#display1 h3, #display1 div {
    display: inline-block;
    border: 8px solid rgb(0, 68, 255);
    vertical-align: middle;
}

#display2 {
    border: 2px solid skyblue;
    height: 250px;
    display: flex; /* goes with the parent */
    margin-bottom: 12px;
    justify-content: center;
    gap: 5px;
}

#display2 * {
    height: 15vw;
}

#display3 {
    border: 2px solid rgb(0, 255, 229);
    margin-bottom: 12px;
    text-align: center;
    height: 250px;
}

#display3 * {
    display: inline;
    padding: 20px;
    margin: 5px;
}

h3 {
    color: red;
    position: absolute;
    top: 10px; left: 10px;
}