html, body {
  height: auto;
  width: 100%;
  padding: 0;
  margin: 0;
  font-family: 'Open Sans', sans-serif;
  background: var(--color-bg);
	color: var(--color-fg);
  min-height: 100vh;
  display:flex;
  flex-direction:column;
}

:root,
:root.light {
	--color-bg: #fff;
	--color-fg: #000;
  --color-bg-light: rgba(0, 0, 0, 0.15);
  --color-fg-light: rgba(0, 0, 0, 0.5);
}
:root.dark {
	--color-bg: #2f2f2f;
	--color-fg: #fff;
  --color-bg-light: rgba(255, 255, 255, 0.15);
  --color-fg-light: rgba(255, 255, 255, 0.5);
}
:root.oled {
	--color-bg: #000;
	--color-fg: #fff;
  --color-bg-light: rgba(255, 255, 255, 0.15);
  --color-fg-light: rgba(255, 255, 255, 0.5);
}

.header h1 {
  transform: translateY(-50%);
}

.header .navigation-links {
  position: absolute;
  text-align: center;
  height: 50%;
  width: 100%;
  bottom: 0;
/*   border: 2px solid red;
  border-bottom: none; */
}

.header .navigation-links a {
  display: inline-block;
  text-decoration: none;
  line-height: 45px;
  transform: translateY(-2px);
  border-radius: 10px 10px 0 0;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-bottom: none;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  height: 100%;
  width: auto;
  z-index: 2;
  font-size: 20px;
  text-align: center;
  font-family: 'Open Sans', sans-serif;
}

.header .navigation-links a:hover {
  border: 2px solid rgb(255, 255, 255);
  border-bottom: none;
}

#banner {
  display: block;
  background-color: orange;
/*   position: fixed; */
  color: white;
  transform: translateY(91px);
  text-align: center;
  font-size: 18px;
  width: 100%;
/*   border: 2px solid red; */
  z-index: 1;
}


#themes input, label {
  float: left;
}

#themes label + input {
  clear: both;
}

.main-content .description-text a {
  color: var(--color-fg);
}

.header h1, a {
  color: white;
  text-align: center;
/*   border: 5px solid red; */
}

/* #dropdown-button {
  position: absolute;
  transform: rotate(-90deg);
  width: 50px;
  height: 35px;
  top: 0;
  background: none;
  border: none;
  transition: transform .5s;
}

#dropdown-button span {
  position: absolute;
  left: 0;
  top: 35px;
  width: 100px;
  border-radius: 5px;
  background-color: white;
  color: black;
  display: none;
}

#dropdown-button:hover > #dropdown-button span {
  transition: transform .5s;
  transform: rotate(0);
  display: block;
}

#dropdown-button span a {
  font-size: 20px;
  color: black;
} */

.main-content {
  width: 100%;
  height: auto;
  display: block;
  margin-top: 75px;
  position: relative;
/*   position: absolute; */
  flex: 1 0 auto;
  padding-bottom: 1em;
  box-sizing: border-box;
/*   border: 5px solid red; */
/*   z-index: 1; */
}

.main-content .title-text {
  width: 50%;
  border-bottom: 2px solid var(--color-fg);
}

.main-content .description-text {
  margin-top: -15px;
  color: var(--color-fg);
}

#nav-style {
  display: inline-block;
  text-decoration: none;
/*   line-height: 45px; */
/*   transform: translateY(-100%); */
  border-radius: 10px;
  border: 2px solid var(--color-fg-light);
  background: var(--color-bg-light);
/*   background: var(--color-fg); */
  color: var(--color-fg);
/*   height: 25%; */
  width: auto;
  z-index: 2;
/*   font-size: 15px; */
  text-align: center;
  font-family: 'Open Sans', sans-serif;
}

#nav-style:hover {
  border: 2px solid var(--color-fg);
}

.header {
  width: 100%;
  position: fixed;
  top: 0;
  background-image: url('nav-bg.svg');
  background-size: cover;
  background-position: center;
  border-bottom: 5px solid black;
  z-index: 2;
/*   border: 5px solid red; */
}

.footer {
  background-color: #3c3c3c;
  height: 100px;
/*   position: static; */
/*   transform: translateY(100%); */
/*   display: block; */
  position: relative;
  text-align: center;
  color: white;
  bottom: 0;
/*   flex-shrink: 0; */
}

.footer a {
  padding: 0 10px;
  border-left: 2.5px solid white;
}

.footer div {
  padding: 0 10px;
  border-left: 2.5px solid white;
  border-right: 2.5px solid white;
}

/* Popup container - can be anything you want */
.popup {
  position: relative;
  display: inline-block;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  text-decoration: underline;
}

/* The actual popup */
.popup .popuptext {
  visibility: hidden;
  width: 160px;
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 8px 0;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -80px;
}

/* Popup arrow */
.popup .popuptext::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: #555 transparent transparent transparent;
}

/* Toggle this class - hide and show the popup */
.popup .show {
  visibility: visible;
  -webkit-animation: fadeIn 1s;
  animation: fadeIn 1s;
}

/* Add animation (fade in the popup) */
@-webkit-keyframes fadeIn {
  from {opacity: 0;} 
  to {opacity:1;}
}

@keyframes fadeIn {
  from {opacity: 0;}
  to {opacity:1;}
}