/* css reset rule*/
* {
    margin: 0; padding: 0;
}


/* type selector */

body {
    background-color: #234;
    color:#eee;
    font-family: Verdana, arial, sans-serif;
    padding: 12px;
}
header {
    border: 4px solid #222;
    padding: 12px
}

/* child selector */

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

/* descendent selector */

header span {
    display: block;
    border: 0px;
    color: #ff4;
}

/* class selector*/

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

/* ==================== */
/* CSS Examples */
section {
    display: flex;
    justify-content: center;
    flex-flow: row wrap;
    /* allows extra scoll */
    margin-bottom: 800px;
}
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;
}

/* 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 15px white
}
#art3 h2 {
    font-family: "Quantico", "sans-serif";
    text-align: center;
    font-size: 18pt;
    color: yellow;
}
#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: 2px solid yellowgreen;
    width: 100%;
    text-align: center;
    /* padding-bottom: 10px; */
}
#art5 {
    position: relative;
}
#art5 div {
    /* setting position absolute to ALL divs within art5 */
    position: absolute;
}
#art5 div:nth-of-type(1) {
    width: 40%; aspect-ratio: 1;
    background-color: #f44;
    bottom: 10px; left: 64px;
    z-index: 2;
}
#art5 div:nth-of-type(2) {
    width: 40%; aspect-ratio: 1;
    background-color: #44f;
    bottom:-10px; right: 64px;
    z-index: 1;
}
#art6 {
    transition: all 300ms linear;
}
/* pseudo element */
#art6:hover {
    background-color: #404;
    color: #ff4;
    border: 2px solid yellowgreen;
}

/* adjacent selector */

header + p {
    display: none;
}


/* css ruleset, aka rule
selector {
    declaration1;
    decleration2;
    property: value;
    property: value;
    property: value, value2, value3;
    property: value value;
}
    */