* {
    margin: 0;
  }

body {
  background-color:ghostwhite;
  overflow-x: hidden;
  font-family: Arial, Helvetica, sans-serif;
}

.page-heading {
  font-size: 5em;
  font-family: Arial, Helvetica, sans-serif;
  color: cadetblue;
  text-align: center;
  margin: auto;
  padding-top: 60px;
  padding-bottom: 10px;
  width: auto;
}

.sub-heading {
  font-size: 3em;
  font-family: Arial, Helvetica, sans-serif;
  color: cadetblue;
  text-align: center;
  margin: auto;
  margin-bottom: 45px;
  padding-top: 10px;
  padding-bottom: 10px;
  width: auto;
}

.sub-heading a {
    color: black;
    font-style: italic;
}

/* div p {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 24px;
  margin: auto;
  padding: 30px;
  font-weight: 500;
} */

p {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 24px;
    line-height: 1.6;
    color: #444;
    margin: 0 0 16px 0;  /* restore some vertical rhythm */
}

/* Only apply this to legacy sections, not the splash */
#sample p,
#features p {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 24px;
    font-weight: 500;
    padding: 30px;
    margin: auto;

}

img {
  display: block;
  padding: 35px;
  margin: auto;
  width: 75%;
  height: 75%;
}

#start {
  float: none;
  padding-top: 40px;
}

#features ul {   
  font-family: Arial, Helvetica, sans-serif;
  font-size: 24px;
}

#sample {
/*   float: left;
  background-color: #fdfbfb;
  margin: 1em;
  width: 100% */

  margin: auto;
  width: 45%;
}

.sampleImg {
  /*   float: left;
    background-color: #fdfbfb;
    margin: 1em;
    width: 100% */
  
    margin: auto;
    width: 60%;
}

#sampleSemantics {
  /*   float: left;
    background-color: #fdfbfb;
    margin: 1em;
    width: 100% */
  
    margin: auto;
    width: 50%;
}

.capabilities-intro p {
    margin-bottom: 10px;
}


.splash-container {
    max-width: 1200px; /* widened */
    margin: 0 auto;
    padding: 40px 20px;
    text-align: center;
}

.splash-title {
    font-size: 2.4rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #222;
}

.splash-text {
    font-size: 1.15rem;
    line-height: 1.65;
    margin-bottom: 22px;
    color: #444;
}

.splash-capabilities {
    /* margin: 40px auto; */
    text-align: left;
    max-width: 900px; /* widened */
    margin-top: 10px;
    margin: auto;
}

.cap-title {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #222;
    text-align: center;
}

.cap-list {
    list-style: disc;
    padding-left: 30px;
    font-size: 1.5rem;
    line-height: 1.55;
    color: #444;
}

.cap-list li {
    margin-bottom: 10px;
}

.splash-image {
    display: block;
    margin: 40px auto 0 auto;
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 4px 18px rgba(0,0,0,0.12);
}

.definition-block {
    margin-bottom: 40px;   /* spacing between sections */
}

.definition-headline {
    font-weight: 700;
    font-size: 1.9rem;
    margin-bottom: 10px;   /* tight connection to the paragraph */
    color: #222;
}




/***************************** navigation menu */
a {
  text-decoration: none;
}

#nav_home {
  background-color: #D3D3D3;
  margin: 0 auto;
  width: 100%;
  height: 50px;
  padding: 10px 0px 10px 70px;
  /* margin-top: 25px; */
}

#nav_home ul {
  /* padding-top: 20px; */
  height: 50px;

}

#nav_home > ul > li:not(:last-child) {
  border-right: 1px solid black;
}
 
#nav_home ul li {
  float: left;
  list-style: none;
  position: relative;
}

#nav_home ul li a {
	display: block;
	text-decoration: none;
	font-size: 20px;
  font-family: Arial, Helvetica, sans-serif;
	/* color: #1e1e1e; */
  color: darkred;
  font-weight: bold;
	padding: 0px 10px;

}

#nav_home ul li ul {
	display: none;
	position: absolute;
	background-color: white;
	padding: 5px;
	border-radius: 0px 0px 4px 4px;
}

#nav_home ul li:hover ul {
	display: block;
  height: auto;
  width: 14rem;
}

#nav_home li:hover {
  background-color: #f3f3f3;
}

/* add drop down arrow to menu */
#aiCommand::after,
#changes::after,
#system::after,
#environment::after,
#manuals::after {
  content: "\25BE";
}

/* submenu */
#nav_home ul li ul li {
  width: 220px;
	/* border-radius: 4px; */
}

/* .group {
  border-bottom: 3px solid lightgray;
}
 */
#nav_home ul li ul li a  {
	padding: 8px 14px;
}

#nav_home ul li ul li a:hover {
	background-color: #f3f3f3;
}

/************************************* footer */
footer {
clear: both;
background-color: lightskyblue;
border-top: 2px solid black;
padding: 2px;
width: 100%;
bottom: 0;
} 

footer p {
	font-size: 1em;
	text-align: center;
  padding-bottom: 2px;
  margin: 0;
}

/* portrait */
@media only screen and (max-width: 361px) {

  #nav_home ul li:hover ul {
    display: block;
    height: auto;
    width: 8rem;
  }
  
  .page-heading, .sub-heading {
    padding-top: 15px;
  }

  #hephaestus-definition {
    max-width: 900px;
    margin: 0 auto 40px;
    text-align: left;
}
  
  #hephaestus-definition p {
    width: 95%;
    font-size: .75em;
    padding: 3px;
  }

  #nav_home {
    background-color: ghostwhite;
    margin: 0 auto;
    width: 100%;
    height: 50px;
    margin-top: 25px;
    padding: 10px 0px 10px 20px;
  }

  #nav_home ul {
    padding-top: 0px;
    padding-left: 5px;
  }

  #sample {
    display: none;
  }

  #start {
    display: none;
  }

  .page-heading, .sub-heading {
    font-size: 1.5em;
  }
}

/* landscape */
@media only screen and (max-width: 740px) {

  #nav_home {
    background-color: ghostwhite;
    margin: 0 auto;
    width: 100%;
    height: 50px;
    margin-top: 25px;
    padding: 10px 0px 10px 0px;
  }

  #nav_home ul li:hover ul {
    display: block;
    height: auto;
    width: 9rem;
  }

  #nav_home ul li a {
    display: block;
    text-decoration: none;
    font-size: 15px;
    font-family: Arial, Helvetica, sans-serif;
    /* color: #1e1e1e; */
    color: darkred;
    font-weight: bold;
    padding: 0px 10px;
  
  }
  
  #hephaestus-definition p {
    width: 95%;
    font-size: .75em;
    padding: 3px;
  }
  
  #nav_home ul {
    padding-top: 0px;
    padding-left: 5px;
  }

  #sample {
    display: none;
  }

  #start {
    display: none;
  }

  .page-heading, .sub-heading {
    font-size: 1.5em;
  }
}