@font-face {
  font-family: "spaceQuest";
  src: url("fonts\spaceQuest.otf") format("opentype");
  font-weight: normal;
  font-style: normal;
}

.text-green-highlight{
  color:#00ff55;
}

section{
    margin: 0px;
}

p{
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-size: 17px;
    color: #05070d;
    line-height: 1.7;
}

.p-white{
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    color: #ffffff;
}


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

/* Page background */
body {
    margin: 0;
  font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;

  color: white;
}

header{
  /*position: fixed;*/

}

/* Header area */
.site-header {
  padding: 10px 20px;
}



container{
    max-width: 1100;
    background-color: #05070d;
    height: 70vh;
}


/* Navbar container */
.navbar {

   position: sticky;
   top: 0;
  z-index: 1000;

  max-width: 1100px;          /* keeps it from stretching full width */
  margin: 0 auto;             /* centers it */
  padding: 18px 28px;
  background: rgba(10, 14, 24, 0.95);
  border: 1px solid rgba(0, 255, 85, 0.35);
  border-radius: 18px;

  display: flex;
  justify-content: space-between;
  align-items: center;

  box-shadow:
    0 0 12px rgba(0, 255, 85, 0.15),
    0 0 30px rgba(0, 255, 85, 0.06);
}

/* Logo */
.nav-logo {
  font-size: 1.2rem;
  font-weight: bold;
  letter-spacing: 2px;
  color: #00ff55;
  text-transform: uppercase;
  text-shadow: 0 0 8px rgba(0, 255, 85, 0.45);
}



/* Links container */
.nav-links {
  list-style: none;
  display: flex;
  gap: 24px;
}

/* Links */
.nav-links a {
  text-decoration: none;
  color: #e8ecff;
  font-size: 1rem;
  transition: 0.25s ease;
  padding: 8px 12px;
  border-radius: 10px;
}

/* Hover effect */
.nav-links a:hover {
  color: #00ff55;
  background: rgba(0, 255, 85, 0.08);
  box-shadow: 0 0 10px rgba(0, 255, 85, 0.2);
}




.container{
    max-width: 1100px;
}


/* Create two equal columns that sits next to each other */
.column {
  flex: 50%;
  padding: 0 4px;
  margin-left: 50px;
  margin-right: 50px;
}

.column h2{
    padding-top: 0px;
    
}

.column img {
  margin-top: 0px;
  width: 100%;
  height: 200px;
  vertical-align: middle;
  box-shadow: 6px 6px 10px rgba(202, 202, 202, 0.5);
}



html{
    height: 100%;   /*We add this to fix a common alignment issue*/
    border-style: none;
    border: 0px;
    margin: 0px;
    padding: 0px;
    background-color: rgb(0, 0, 0);
}
h1{
  font-family: "Audiowide", sans-serif;
    /*font-family: oswald, sans-serif;*/
    font-size: 55px;
    

    color: rgb(255, 255, 255);
    text-align: center;
    text-shadow:rgba(0, 0, 0, 0.105) 2px 2px 6px;
    letter-spacing: 2px;
    margin-top: 15px;
    margin-bottom: 15px;
    padding: 15px;
}

h2{
    font-family: oswald, sans-serif;
    font-size: 40px;

    color: rgb(255, 255, 255);
    text-align: center;
    text-shadow:rgba(0, 0, 0, 0.105) 2px 2px 6px;
    letter-spacing: 2px;
    margin-top: 15px;
    margin-bottom: 15px;

}

h3{
    font-family: open-sans, sans-serif;
    font-size: 30px;
    font-weight: bold;
    font-style: italic;
    text-align: center;
    color:rgb(31, 31, 31);
    letter-spacing: 0.8px;
}

h4{
    font-style: open-sans, sans-serif;
    font-size: 15px;
    font-weight: lighter;
    text-align: center;
    font-style:italic;
    color: rgb(70, 70, 70);
    letter-spacing: 0.5px;
}



h5{
    font-size: 15px;
    color:rgb(255, 255, 255);
}


container{
  max-width: 1100px;          /* keeps it from stretching full width */
  margin: 0 auto;             /* centers it */
}





body{
    background-color: rgb(0, 0, 0);
    
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;


}



/*This is used to add a spaced bar between sections*/
.titleBarSpacer{
    height: 70px;
    width: auto;
    background-color: rgb(255, 255, 255);
}

.titleBarGrey{
    height: 100px;
    width: auto;
    background-color: rgb(238, 238, 238);
    text-align: center;
    padding-top: 20px;
    padding-bottom: 0px;

}

/*This contains the name of the section and has a different background*/
.titleBar{
    height: 150px;
    width: auto;
    text-align: center;
    padding-top: 5px;
    padding-bottom: 5px;
    background-position-y: -600px;
    background-position-x: -5800px;
    

}

.chapterSelectBox{
    text-align: center;
    vertical-align: top;
    height: 400px;
    width: 50%;
    border: 6px solid rgb(215, 215, 215) ;
    box-sizing: border-box;
    padding: 10px;
    float: left;

    
    
}

/*Container that will hold the picture for the chapter inside. This is to make it easier to move the picture to center.*/
.chapterSelectImage{
    width: 382px;
    height: 150px;
    margin-top: 10px;
    margin-bottom: 10px;
    border-radius: 10px;
    box-shadow: 0 0 5px rgb(76, 76, 76);

    margin-left: 30px;
    margin-right: 30px;
    margin-top: 20px;
    margin-bottom: 20px;
    padding: 5px;
}

.chapterSelectPicture{
    width: 100%;
    height: 100%;
    border-radius: 10px;
    box-shadow: 0 0 5px rgb(76, 76, 76);

}


.chapterSection{
    
    background-color: white;
    padding-top: 50px;
    padding-bottom: 50px;
    height: auto;


}

.gridContainer{
    display: grid;
    grid-template-columns: repeat(auto, auto, auto, auto);
    gap: 20px;
    justify-content: center;
    height: auto;
}








.hero{
  height: 80vh;
  max-width: 1100px;     /* stops stretching */
  margin: 0 auto;        /* centers section horizontally */

  display: flex;
  justify-content: center;  /* horizontal centering */
  align-items: center;      /* vertical centering */

   text-align:center;
  min-height: 400px;     /* gives the section height so vertical centering works */
  
  background-image: url("images/aesthetic-physics.png");
  background-size: cover;
  background-position: top;
  background-repeat: no-repeat;
  margin-bottom: 40px;
}

.blackhole{
  background-image: url("images\blackole-background.png");
  justify-content: center;  /* horizontal centering */
  align-items: center;      /* vertical centering */

}




/*The CSS below makes a two column section when using Section element*/
.two-column-section {

}

.section-container {
  max-width: 1100px;
  margin: 0 auto;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.image-container{
  width: auto;
  height: auto;
  max-width: 50ch;
  object-fit: contain;
  justify-content: center;
  align-items: center;
}

.blackhole-container{
  background-image: url("imageszz/blackole-background.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}



.text-container{
    max-width: 65ch;
}


.text-column {
  flex: 1;
}

.image-column {
  flex: 1;
}

.image-column img {
  width: 100%;
  border-radius: 12px;
}

.cta-button {
  margin-top: 20px;
  padding: 12px 24px;
  background: #00ff55;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}






.progress-container {
  width: 100%;
  height: 8px;
  background: #a96969;
}

.progress-bar {
  height: 8px;
  background: #04AA6D;
  width: 0%;
}

.content {
  padding: 100px 0;
  margin: 50px auto 0 auto;
  width: 80%;
}

.warp-down{
  display: flex;
  flex-wrap: wrap;   /* This makes items drop down */
  gap: 20px;  
}