:root {
  --height: 0;
}

/*General HTML*/
html {
  background-color: rgb(19, 19, 19);
}

body {
  margin: 0;
  cursor: default;
  user-select: none;
}

/*Background*/
div.image {
  margin-left: 0;
  position: relative;
}

img#background-pic {
  display: block;
  margin-left: auto;
  height: 400px;
  width: 100%;
  max-width: 900px; 
  object-fit: cover;
}

h1#header-font {
  position: absolute;
  font-family: Antonio;
  top: 0;
  color: rgb(139, 174, 102);
  margin-left: 1%;
  font-size: 40px;
}

/*mitte*/
div.center {
  justify-content: center;
  display: flex;
  align-items: center;
  width: 100%;
  margin-left: 1%;
  margin-right: 1%;
  text-align: center;
  flex-direction: column;
}

/*fonts*/
h1.headline {
  color: white;
  font-family: OS;
}

/*buttons*/
button.btn1 {
  font-family: OS;
  background: none;
  transition: 0.2s;
  border: 1px rgb(139, 187, 146) solid;
  border-radius: 100px;
  color: rgb(139, 187, 146);
  margin-bottom: 10px;
  font-size: 19px;
  cursor: pointer;
}

button.btn1:hover {
  font-size: 20px;
  border: 1px rgb(42, 131, 95) solid;
  color: rgb(42, 131, 95);
}

a {
  color: rgb(139, 187, 146);
  font-size: 20px;
  transition: 0.2s;
  font-family: OS;
}

a::after {
  content: "👆";
  font-family: NE-1;
  display: inline-block;
  transform: rotate(-30deg);
}

a:hover {
  font-size: 19px;
}

button.back {
  bottom: 2%;
  right: 2%;
  background: none;
  border: 1px rgb(235, 213, 171) solid;
  position: absolute;
  height: 70px;
  width: 70px;
  border-radius: 100px;
  position: fixed;
  font-size: 40px;
  text-align: center;
  font-family: NE-2;
  color: rgb(139, 174, 102);
  transition: 0.2s;
  cursor: pointer;
}

button.back:hover {
  font-size: 42px;
  height: 72px;
  width: 72px;
}

/*table*/
table {
  border-collapse: collapse;
  border: 2px rgb(139, 174, 102) solid;
  width: 90%;
  text-align: center;
}

tr,
td,
th {
  border: 2px rgb(139, 174, 102) solid;
  font-family: OS;
  color: rgb(235, 213, 171);
  font-size: 20px;
  text-align: center;
  padding-top: 10px;
  padding-bottom: 20px;
}

/*iframe display*/
iframe {
  height: var(--height);
  border: none;
  filter: invert();
  width: 100%;
}