body {background-color: #234; color: #eee; font-family: verdana,Arial, sans-serif; padding: 12px; border: 4px solid #222; padding-bottom: 800px; margin: 4px; padding: 12px;}

header {padding: 12px;}

header > h1 {text-align: center; font-weight: normal; text-transform: uppercase; color: yellowgreen; padding-bottom: 20px; margin-bottom: 20px; border-bottom: 2px solid hotpink;}

header span {display: block; color: #ff4;}

.subtitle {text-align: center; 
    /* border: 2px solid #222;  */
    padding: 10px;
    line-height: 1.5;
    text-transform: lowercase;
    letter-spacing: 8px;
}

/* adjacent selector */

header + p {display: none;}

/* css reset rule is identified by "*" as the selector*/

* {margin: 0; padding: 0;}


/*=============*/
/* CSS Examples */

section {
    display: flex;
    justify-content: center;
    flex-flow: row wrap;
    border: 2px solid yellow;
}

section article {
    border: 2px solid hotpink;
    max-width: 360px;
    min-height: 200px;
    margin: 10px;
    flex: 0 0 auto;
    padding: 4px;
}

article h2 {
    font-size: 16pt;
}

article p {
    margin: 8px;
    line-height: 1.4;
}

/* ID selector */

#art1 div {
    width: 70%;
    aspect-ratio: 2/1;
    background-color: skyblue;
    margin: 20px auto;
    border-radius: 20px;
}

#art2 div {
    width: 70%;
    aspect-ratio: 2.5/1;
    background-color: #000;
    /* center a block */
    margin: 20px auto;
    border-radius: 20px;
    box-shadow: -4px 8px 14px white;
}

#art3 h2 {
    font-family: "Playwrite HU", cursive;
    text-align: center;
    font-size: 18pt;
    color:  #ff3;
}

#art4 {
    /* use position relative on the parent */
    position: relative;
}

#art4 h2 {
    color: #ff3;
    /* use position absolute on the child you want to manipulate */
    position: absolute;
    bottom: 10px; left: 0;
    border: 0px solid yellowgreen;
    width: 100%;
    text-align: center;
    /* padding-bottom: 10px; */
}

#art5 {
    position: relative;
}

#art5 div {
    /* setting position absolute to all divs withing art5 */
    position: absolute;
}

#art5 div:nth-of-type(1) {
    width: 40%;
    aspect-ratio: 1;
    background-color: #f44;
    bottom: 10px; left: 64px;
    z-index: 5;
}

#art5 div:nth-of-type(2) {
    width: 40%;
    aspect-ratio: 1;
    background-color: #44f;
    bottom: -10px; right: 64px;
    z-index: 3;
}

#art6 {
    transition: all 300ms linear;
}
/* pseudo element */
#art6:hover {
    background-color: #404;
    color: #ff4;
    border: 2px solid yellowgreen
}