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

html {
    font-size: 62.5%;
}

@font-face {
font-family: "lato-bold";
src: url(../assets/fonts/lato/Lato-Bold.ttf);
}

@font-face {
font-family: "lato-light";
src: url(../assets/fonts/lato/Lato-Light.ttf);
}

@font-face {
font-family: "lato-regular";
src: url(../assets/fonts/lato/Lato-Regular.ttf);
}

h1 {
    position: relative;
    font-family: "lato-bold";
    color: #400046;
    font-size: 5.5em;
    z-index: 1;
}

h2 {
    font-family: "lato-bold";
    color: #400046;
    font-size: 5em;
}

h3 {
    font-family: "lato-bold";
    color: #400046;
    font-size: 4em;
}


.navbar {
    width: 100%;
    height: 15.61497em;
    background-color: #8777B2;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-logo {
    padding-left: 7em;
}

.nasa-logo {
    width: 120px;
    height: 100px;
} 

.navbar-list {
    padding-right: 4em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 3em;
}

.explore-navbar-list {
    padding-right: 4em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5em;
}

.navbar-links {
    font-family: "lato-regular";
    color: white;
    text-transform: uppercase;
    font-size: 2em;
    margin-top: 3em;
    list-style-type: none;
    z-index: 1;
}

.navbar-links a:link {
    color: white;
    text-decoration: none;
}

.navbar-links a:visited {
    color: white;
}

.chandra-button {
    width: 6em;
    height: 2em;
    border: 1px solid #39BDEF;
    display: flex;
    justify-content: center;
    align-items: center;
}

.chandra a:link {
    color: #39BDEF;
}

.chandra a:visited {
    color: #39BDEF;
}

.logo-header {
    width: 100%;
    height: 29.2em;
    background-color: #000D46;
    display: flex;
    justify-content: center;
}


.logo {
    width: 803px;
    height: 534px;
    position: relative;
    top: -29.8%;
}

.intro-container {
    width: 100%;
    padding: 8em 3em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.intro-center {
    width: 110em;
    display: flex;
    flex-direction: column;
}

.intro-header-container {
    width: 70em;
    padding-bottom: 2em;
}

.intro-text-container {
    width: 100%;
    padding-bottom: 5em;
    display: flex;
    flex-direction: column;
}

.intro-text {
    font-family: "lato-regular";
    font-size: 2.4em;
    line-height: 1.1em;
}

.get-started-button-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.get-started-button {
    width: 29.5302em;
    height: 7.7em;
    border: none;
    border-radius: 37px;
    background: #001D35;
    cursor: pointer;
    outline: none;
    text-decoration: none;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.get-started-button-text {
  font-family: "lato-bold";
  color: #f5dbff;
  font-size: 3em;
  font-weight: 700;
}

.get-started-button:hover {
    background: #a849e3;
}

.get-started-button-text:hover {
    color: white;
  }

.get-started-button-text a:visited {
    color: white;
    text-decoration: none;
}

.sci-son-container {
    width: 100%;
    background-color: #F0F0F0;
    padding-top: 2.5em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.sci-son-center {
    width: 92.5em;
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
}

.science-container {
    width: 50%;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.science-text-container {
    padding: 3.1em 0;
}

.science-text {
    font-family: "lato-regular";
    padding: 0.6em 0;
    font-size: 1.7em;
    line-height: 1.2em;
}

.sonification-text a:link {
    text-decoration: none;
    color: #0000EE;
}

.sonification-text a:visited {
    color: #8777B2;
}

.sci-son-break {
    height: 45em;
    margin: 0 2em;
    border: 1px solid #8777B2;;
}

.sonification-container {
    width: 50%;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.sonification-text-container {
    padding: 3.1em 0;
}


.sonification-text {
    font-family: "lato-regular";
    padding: 0.6em 0;
    font-size: 1.7em;
    line-height: 1.2em;
}


.lessons-container {
    width: 100%;
    background-color: white;
    padding-top: 2.5em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.lessons-center {
    width: 92.5em;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.lessons-text-container {
    width: 100%;
    padding-bottom: 4em;
    display: flex;
    flex-direction: column;
}

.lessons-text {
    font-family: "lato-regular";
    padding: 2.5em 0;
    font-size: 1.7em;
    line-height: 1.2em;
}

.videos-container {
    width: 100%;
    background-color: white;
    padding-top: 1em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.videos-center {
    width: 120em;
    padding-bottom: 2.5em;
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 4.5em;
}

.videos {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.videos-embed {
    width: 460px;
    height: 250px;
}

.videos-text-container {
    padding-top: 3px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.videos-text {
    color: #400046;
    font-family: "lato-bold";
    font-size: 1.7em;
    font-weight: bold;
    padding-top: 0.1em;
}

.videos-text-title {
    color: #400046;
    font-family: "lato-regular";
    font-size: 1.7em;
    padding-top: 0.1em;
}

.videos-text-title a:link {
    text-decoration: none;
}

.videos-text-title a:visited {
    color: #400046;
}



.eximages-container {
    width: 100%;
    background-color: white;
    padding-top: 1em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.eximages-center {
    width: 120em;
    padding-bottom: 2.5em;
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 2.5em;
}

.eximages {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.eximages-embed {
    width: 460px;
    height: 250px;
}

.eximages-text-container {
    padding-top: 3px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.eximages-text {
    color: #400046;
    font-family: "lato-bold";
    font-size: 1.4em;
    font-weight: bold;
    padding-top: 0.1em;
}

.eximages-text-reg {
    color: #400046;
    font-family: "lato-regular";
    font-size: 1.4em;
    font-weight: normal;
    padding-top: 0.1em;
}

.eximages-text-title {
    color: #400046;
    font-family: "lato-regular";
    font-size: 1.7em;
    padding-top: 0.1em;
}

.eximages-text-title a:link {
    text-decoration: none;
}

.eximages-text-title a:visited {
    color: #400046;
}









.teacher-container {
    width: 100%;
    background-color: white;
    padding-top: 2.5em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.teacher-center {
    width: 92.5em;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.teachernotes {
    font-family: "lato-bold";
    color: #400046;
    font-size: 2em;
}

.eximagesnotes {
    font-family: "lato-bold";
    color: #400046;
    font-size: 2em;
}


.survey {
    font-family: "lato-bold";
    color: #400046;
	font-size: 1.6em;
	line-height: 1.6em;
	margin-bottom: 2em;
	text-align: center;
	background-color: #f3ccb9;
	padding: 1.7em;
}

.teacher-text-container {
    width: 100%;
    padding-bottom: 4em;
    display: flex;
    flex-direction: column;
}

.teacher-text {
    font-family: "lato-regular";
    padding: 1.5em 1em;
    font-size: 1.7em;
    line-height: 1.2em;
}

.teacher-text-inner {
    font-family: "lato-regular";
    margin-left: 2.5em;
    padding: 0.9em 1em;
    font-size: 1.7em;
    line-height: 1.2em;
}

.teacher-text-inner a:visited {
    color: #8777B2;
}



.resources-container {
    width: 100%;
    background-color: #F0F0F0;
    padding-top: 2.5em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.resources-center {
    width: 92.5em;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.resources-text-container {
    width: 100%;
    padding-bottom: 2.5em;
    display: flex;
    flex-direction: column;
}

.resources-text {
    font-family: "lato-regular";
    padding: 0.8em 0;
    font-size: 1.7em;
    line-height: 1.2em;
}

.resources-text a:visited {
    color: #8777B2;
}


.footer {
    width: 100%;
    background-color: #000D46;
    display: flex;
    justify-content: center;
}

.footer-contact {
    width: 90%;
    padding: 3em 0;;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    flex-wrap: wrap;
    gap: 3em;
}

.footer-contact-block {
    display: flex;
    flex-direction: column;
}

.footer-contact-block-text {
    font-family: "lato-regular";
    color: #F0F0F0;
    font-size: 1.3em;
}

.footer-contact-block-socials {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.footer-contact-block-img {
    margin-left: 0.5em;
}

.footer-about-block {
    padding-top: 2.5%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.4em;
}

.footer-about-block-text {
    font-family: "lato-regular";
    color: #F0F0F0;
    font-size: 1.2em;
}

.footer-about-block-text a:link{
    text-decoration: none;
    color: #5e9eb1;;
}

.footer-about-block-text a:visited{
    text-decoration: none;
    color: #5e9eb1;;
}

.explore-container {
    width: 100%;
    padding: 8em 3em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.explore-container:nth-child(2n) {
    background-color: #F0F0F0;
}

.explore-center {
    width: 110em;
    display: flex;
    flex-direction: column;
}

.explore-system-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5em;
}

.more-container {
    width: 100%;
    background-color: #F0F0F0;
    padding-top: 2.5em;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.more-center {
    padding: 2em 0;
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
}

.more-systems {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.more-systems-break {
    height: 15em;
    margin: 0 2em;
    border: 1px solid #8777B2;;
}

.more-systems-button-container {
    padding-bottom: 5em;
    display: flex;
    justify-content: center;
    align-items: center;
}

.more-systems-button {
    width: 29.5302em;
    height: 7.7em;
    border: none;
    border-radius: 37px;
    background: #001D35;
    cursor: pointer;
    outline: none;
    text-decoration: none;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.more-systems-button-text {
  font-family: "lato-bold";
  color: #f5dbff;
  font-size: 3em;
  font-weight: 700;
}

.more-systems-button:hover {
    background: #a849e3;
}

.more-systems-button-text:hover {
    color: white;
  }

.more-systems-button-text a:visited {
    color: white;
    text-decoration: none;
}

@media (max-width: 1420px) {

    html {
        font-size: 55%;
    }

    .logo {
        width: 676px;
        height: 450px;
        top: -24.1%;
    }
}

@media (max-width: 1200px) {

    .logo {
        width: 601px;
        height: 400px;
        top: -10.9%;
    }

    .more-systems-break  {
        display: none;
    }
}

@media (max-width: 1000px) {

    .intro-center {
        width: 95em;
    }

    .explore-center {
        width: 95em;
    }
}

@media (max-width: 900px) {

    .intro-container {
        padding-top: 11em;
    }

    .intro-center {
        width: 80em;
    }
    
    .sci-son-center {
        width: 80.5em;
    }

    .sci-son-break {
        height: 48em;
    }

    .lessons-center {
        width: 80em;
    }

    .teacher-center {
        width: 80em;
    }
	
	
    .resources-center {
        width: 80em;
    }

    .explore-container {
        padding-top: 11em;
    }

    .explore-center {
        width: 80em;
    }
}

@media (max-width: 750px) {

    .navbar-logo {
        padding-left: 1em;
    }

    .nasa-logo {
        width: 84px;
        height: 70px;
    }

    .navbar-list {
        padding-right: 4em;
        gap: 3em;
    }
    
    .navbar-links {
        font-size: 2em;
        margin-top: 1em;
    }

    .intro-container {
        padding-top: 12em;
    }

    .intro-center {
        width: 75em;
    }
    
    .sci-son-center {
        width: 75.5em;
    }

    .sci-son-break {
        height: 55em;
    }

    .lessons-center {
        width: 75em;
    }

    .teacher-center {
        width: 70em;
    }
	
	
    .resources-center {
        width: 70em;
    }

    .explore-container {
        padding-top: 12em;
    }

    .explore-center {
        width: 75em;
    }
}

@media (max-width: 700px) {

    .navbar {
        height: 13em;
    }

    .intro-container {
        padding-top: 11em;
    }

    .intro-center {
        width: 70em;
    }
    
    .sci-son-center {
        width: 70.5em;
    }

    .lessons-center {
        width: 70em;
    }

    .explore-container {
        padding-top: 11em;
    }

    .explore-center {
        width: 70em;
    }
}

@media (max-width: 650px) {

    h1 {
        font-size: 4.5em;
    }

    .logo-header {
        width: 100%;
        height: 20.2em;
    }

    .logo {
        width: 451px;
        height: 300px;
        top: -20%;
    }

    .intro-container {
        padding-top: 10em;
    }

    .intro-header-container {
        width: 55em;
        padding-bottom: 2em;
    }

    .intro-center {
        width: 60em;
    }
    
    .sci-son-center {
        width: 62.5em;
    }

    .sci-son-break {
        height: 58em;
    }

    .lessons-center {
        width: 62.5em;
    }

    .teacher-center {
        width: 62.5em;
    }
	
	

    .resources-center {
        width: 60em;
    }

    .explore-container {
        padding-top: 10em;
    }

    .explore-center {
        width: 60em;
    }
}

@media (max-width: 600px) {

    .navbar-list {
        padding-right: 1em;
        gap: 3em;
    }
    
    .navbar-links {
        font-size: 1.75em;
    }

    .intro-center {
        width: 50em;
    }
    
    .sci-son-center {
        width: 60.5em;
    }

    .lessons-center {
        width: 60em;
    }

    .teacher-center {
        width: 60em;
    }

    .explore-center {
        width: 50em;
    }
}

@media (max-width: 550px) {

    .navbar {
        height: 12em;
        justify-content: space-evenly;
    }

    .navbar-logo {
        padding-left: 0.5em;
    }

    .nasa-logo {
        width: 72px;
        height: 60px;
    }

    .navbar-list {
        padding-right: 0.5em;
        gap: 1em;
    }

    .logo {
        width: 414px;
        height: 275px;
        top: -10%;
    }

    .intro-container {
        padding-top: 7em;
    }

    .intro-header-container {
        width: 50em;
    }
    
    .sci-son-center {
        width: 50.5em;
    }

    .sci-son-break {
        height: 69em;
    }

    .lessons-center {
        width: 50em;
    }

    .teacher-center {
        width: 50em;
    }
	
	
    .resources-center {
        width: 50em;
    }

    .explore-container {
        padding-top: 7em;
    }

    .explore-center {
        width: 50em;
    }
}

@media (max-width: 500px) {

    .logo {
        width: 376px;
        height: 250px;
        top: 0.1%;
    }

    .intro-header-container {
        padding-bottom: 2em;
    }
}

@media (max-width: 450px) {

    .navbar {
        height: 10em;
    }

    .navbar-logo {
        padding-left: 0;
    }

    .nasa-logo {
        width: 60px;
        height: 50px;
    }

    .navbar-list {
        padding-right: 0;
        gap: 0.5;
    }
    
    .navbar-links {
        font-size: 1.4em;
    }

    .logo-header {
        height: 15.2em;
    }

    .logo {
        width: 301px;
        height: 200px;
        top: -6.5%;
    }

    .intro-container {
        padding-top: 5em;
    }

    .intro-header-container {
        width: 40em;
    }

    .intro-center {
        width: 40em;
    }
    
    .sci-son-center {
        width: 50.5em;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .science-container {
        width: 35em;
    }

    .sonification-container {
        width: 35em;
    }

    .sci-son-break {
        height: 0;
        border: none;
    }

    .lessons-center {
        width: 40em;
    }

    .videos-embed {
        width: 368px;
        height: 200px;
    }
	
	.eximages-embed {
        width: 368px;
        height: 200px;
    }

    .teacher-center {
        width: 40em;
    }

    .teacher-text-inner {
        margin-left: 0.4em;
    }
	
	
    .resources-center {
        width: 40em;
    }

    .explore-container {
        padding-top: 5em;
    }

    .explore-center {
        width: 40em;
    }
}

@media (max-width: 370px) {

    .intro-header-container {
        width: 35em;
    }

    .intro-center {
        width: 35em;
    }

    .sonification-container {
        width: 35em;
    }

    .sci-son-break {
        height: 0;
        border: none;
    }

    .lessons-center {
        width: 35em;
    }

    .videos-embed {
        width: 331px;
        height: 180px;
    }
	
	.eximages-embed {
        width: 331px;
        height: 180px;
    }

    .teacher-center {
        width: 40em;
    }
	
	
    .resources-center {
        width: 35em;
    }

    .explore-container {
        padding-top: 5em;
    }

    .explore-center {
        width: 35em;
    }
}

@media (max-width: 340px) {
    
    html {
        font-size: 55%;
    }

    h1 {
        font-size: 4.5em;
    }

    .navbar {
        height: 10em;
        justify-content: space-evenly;
    }

    .navbar-logo {
        padding-left: 0;
    }

    .nasa-logo {
        width: 48px;
        height: 40px;
    }

    .navbar-list {
        padding-right: 0;
        gap: 0.5;
    }
    
    .navbar-links {
        font-size: 1.3em;
    }

    .logo {
        width: 301px;
        height: 200px;
        top: -6.5%;
    }

    .intro-container {
        padding-top: 5em;
    }

    .intro-header-container {
        width: 35em;
        padding-bottom: 2em;
    }

    .intro-center {
        width: 35em;
    }
    
    .sci-son-center {
        width: 50.5em;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .science-container {
        width: 35em;
    }
}

@media (max-width: 310px) {
    
    .navbar-links {
        font-size: 1.1em;
    }

    .intro-header-container {
        width: 28em;
    }

    .sonification-container {
        width: 30em;
    }

    .lessons-center {
        width: 30em;
    }

    .videos-embed {
        width: 276px;
        height: 150px;
    }
	
	.eximages-embed {
        width: 276px;
        height: 150px;
    }

    .teacher-center {
        width: 30em;
    }
	
	
    .resources-center {
        width: 30em;
    }

    .explore-center {
        width: 30em;
    }
}