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

.tagesschrift-regular {
  font-family: "Tagesschrift", system-ui;
  font-weight: 400;
  font-style: normal;
}


.bitcount-grid-double {
  font-family: "Bitcount Grid Double", system-ui;
  font-optical-sizing: auto;
  font-weight: 500;
  font-style: normal;
  font-variation-settings:
    "slnt" 0,
    "CRSV" 0.5,
    "ELSH" 0,
    "ELXP" 0;
}

body {
    background-color: gray;
    color: white;
}

html {
    scroll-behavior: smooth;
}

h3 a { 
    color: white;
}

h3 a:visited {
    color: pink;
}

/* header + nav bar */
header {
    text-align: center;
    position: fixed;
    width: 100%;
    z-index: 999;
}

h1 {
    font-size: 72px;
    margin: 20px 0px 0px 0px;
}

li {
    display: inline-block;
    background-color: white;
    color: black;
    padding: 5px;
    margin: 10px;
}

/* first section (opener) */
.quote {
    /* text-align: center;
    padding: 50px 0px; */
    position: relative;
    top: 300px;
    left: 10%;
    width: 50%; 
    z-index: 10;
}

#section1 {
    background-image: url(moon-images/stars.jpg);
    background-size: cover;
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.redmoon {
    background-image: url(moon-images/moon-red.png); /* alt way to add images, without html img tag */
    width: 700px;
    height: 700px;
    background-size: contain; /* cover also works? */
    position: absolute; /* when you use position absolute, you want the parent to be position relative */
    z-index: 9;
    bottom: -100px;
    right: -100px;
}

.bluemoon {
    background-image: url(moon-images/moon-blue.png); /* alt way to add images, without html img tag */
    width: 800px;
    height: 800px;
    background-size: contain; /* cover also works? */
    position: absolute; /* when you use position absolute, you want the parent to be position relative */
    z-index: 8;
    top: -100px;
    right: -100px;
}

.bwmoon {
    background-image: url(moon-images/moon-bw.png); /* alt way to add images, without html img tag */
    width: 600px;
    height: 600px;
    background-size: contain; /* cover also works? */
    position: absolute; /* when you use position absolute, you want the parent to be position relative */
    z-index: 7;
    bottom: -100px;
    left: -100px;
}

/* second section (moon facts) */
#section2 {
    background-image: url(moon-images/galaxy.jpg);
    background-size: cover;
    background-position: bottom;
    height: 100vh; /* viewport height */
    width: 100%;
}

.flex-column {
    text-align: center;
    width: 25%; 
    margin: 0 50px;
}

/* less pixels make better responsive design (start trying to think in percentages and viewport height instead of pixels) */

/* third section (videos) */
#section3 {
    background-color: black;
}

iframe {
    margin: 100px 50px;
}

/* flex box stuff */
.flex-area {
    display: flex;
    /* display flex always goes on the parent */
    flex-direction: row;
    justify-content: center;
    /* justify content to centering horizontally flex boxes */
    align-items: center;
    /* align-items for vertically centering flex boxes */
}

#section4 {
    background-color: black;
    padding: 100px 0px 100px 0px;
}

/* phases / grid section */
.parent {
display: grid;
grid-template-columns: repeat(3, 1fr);
grid-template-rows: repeat(4, 1fr);
grid-column-gap: 0px;
grid-row-gap: 0px;
text-align: center;
width: 60%;
margin: 0 auto;
}


.div1 { 
    grid-area: 1 / 1 / 2 / 4; 
    background-image: url(moon-images/phases-all.jpg);
    background-size: contain;
    background-position: center;
    color: rgb(71, 156, 185);
}

.div2 { 
    grid-area: 2 / 1 / 3 / 2; 
    background-image: url(moon-images/phase1.jpg);
    height: 300px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.div3 { 
    grid-area: 2 / 2 / 3 / 3; 
    background-image: url(moon-images/phase2.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.div4 { 
    grid-area: 2 / 3 / 3 / 4; 
    background-image: url(moon-images/phase3.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.div5 { 
    grid-area: 3 / 1 / 4 / 2; 
    background-image: url(moon-images/phase4.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.div6 { 
    grid-area: 3 / 2 / 4 / 3; 
    background-image: url(moon-images/phase5.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.div7 { 
    grid-area: 3 / 3 / 4 / 4; 
    background-image: url(moon-images/phase6.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.div8 { 
    grid-area: 4 / 1 / 5 / 2; 
    background-image: url(moon-images/phase7.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.div9 { 
    grid-area: 4 / 2 / 5 / 3; 
    background-image: url(moon-images/phase8.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}


#section4 h2 { /* only targeting the h2 inside section4 (could also use parent or div1 */
    font-size: 36px;
}

p {
    text-transform: uppercase;
    color: rgb(71, 156, 185);
    font-weight: 600;
}

.parent * { /* all children of the parent will take these properties */
    display: flex;
    justify-content: center;
    align-items: center;
}