/* css reset rule */
* {
    margin: 0; padding: 0; border: 0;
    font-family: Verdana;
}

body {
    background-color: palegreen;
    min-height: 150vh;
}

header {
    background-color: #FFC;
    min-height: 10vh;
}

h1 {
    text-align: center;
}

.bigRed {
    background-color: #700;
    width: 70vw; height: 30vh;
    margin: 3em auto;
    box-shadow: 1em 1em 5px #222
}

dl {
    margin: 1em auto;
}

dt {
    font-weight: bold;
    text-indent: 2em;
    text-decoration: underline;
    padding: 4px;
}

dd {
    font-style: italic;
    padding: 4px;
}

/* id attribute # vs class attribute . */
#hero {
    height: 800px;
    background-color: #EEE;
    background-image: url(../images/pumpkins.jpg);
    background-size: cover;
    position: relative;
}

#hero h2 {
    text-align: center; 
    color: #EEE;
    font-size: 50px;
    background-color: rgba(80,80,80,.6);
    padding: .5em;
    text-shadow: 0em 0em 1em #000;
}

.button {
    display: block;
    background-color: #EEE;
    color: orange;
    line-height: 60px;
    font-size: 26px;
    width: 160px; height: 60px;
    text-align: center;
    text-decoration: none;
    font-weight: bold;
    padding: .5em;
    border-radius: 3px;
    position: absolute; right: 50px; bottom: 50px;
    transition: all 150ms ease;
    box-shadow: 4px 4px 4px #444;
}

.button:active {
    box-shadow: 2px 2px 2px #222;
    bottom: 48px;
}