html {
  background-color: #FFFFFF;
  background-image: linear-gradient(to bottom, darkgreen , lightgreen, white);
  background-repeat: no-repeat;
  font-family: verdana;
}

ul {
  list-style: none;
}

body {
  width: 90%;
  max-width: 900px;
  margin: 0 auto;
  background-color: #E0E0E0;
  background-image: linear-gradient(to bottom, #E0E0E0, #FFFFFF);
  padding: 40px 0px 0px 0px;
  border: 0px;
}

.header {
   background-color: #E0E0E0;
   position: fixed;
   top: 0px;
}

.header__content {
   display: flex;
   align-items: left;
   justify-content: space-between;
   padding: 0 15px;
   min-height: 45px;
}

.classic {
    color: #000000;
    padding: 11px;
    font-family: verdana;
    font-size: 16px;
    border: 1px;
    cursor: pointer;
    transition: color 0.4s;
}

.classic:hover {
    color: #4080EE;
}

.ref {
    text-align: right;
    color: #006400;
    font-family: verdana;
    font-size: 12px;
    border: 1px;
    cursor: pointer;
    transition: color 0.4s;
}

.ref:hover {
    color: #00AA00;
    font-size: 12px;
}

.nav {
   font-family: verdana;
   font-size: 14px;
   color: #606060;
}

.nav__list {
   display: flex;
   column-gap: 4px;
}

.hamburger {
  display: none;
  cursor: pointer;
}

.bar {
  height: 2px;
  width: 27px;
  background-color: #000000;
  margin: 5px 0;
  transition: all 0.3s;
}

a {
  font-family: verdana;
  font-size: 16px;
  color: #0000FF;  
  text-decoration: none;
}

a:hover {
  font-family: verdana;
  font-size: 16px;
  color: #0000FF;  
  text-decoration: none;
}

h1 {
  font-size: 40px;
  text-align: left;
  margin: 0;
  padding: 20px 70px;    
  color: #0000AA;
  text-shadow: 3px 3px 1px grey;
}

h2 {
  font-size: 21px;
  text-align: center;
  margin: 0;
  padding: 20px 0px;    
  color: #0000AA;
}

h3 {
  font-size: 18px;
  text-align: center;
  margin: 0;
  padding: 5px 0px;    
  color: #006400;
  text-shadow: 1px 1px 1px grey;
}

h4 {
  font-size: 28px;
  text-align: left;
  margin: 0;
  padding: 20px 70px;    
  color: #0000AA;
  text-shadow: 3px 3px 1px grey;
}

h5 {
  font-size: 18px;
  text-align: left;
  margin: 0;
  padding: 12px;
  color: #0000AA;
}

p, li {
  font-family: verdana;
  font-size: 15px;    
  line-height: 1.2;
  margin-left: 20px;
}

text {
  font-family: verdana;
  font-size: 13px;    
  line-height: 1.1;
  margin-left: 10px;
}

.right {
  color: #0000FF;
  text-align: right;
}

.left {
  color: #000000;
  text-align: left;
}

.rot {
  background-color: #ff9999;
  text-align: center;
}
.gruen {
  background-color: #99ff99;
  text-align: center;
}

article {
  width: 90%;
  padding: 10px;
  background-color: #FFFFFF;
  background-image: linear-gradient(to bottom, #E0E0E0, #FFFFFF);
  text-align: left;
  float: left;
}

.simple {
  box-shadow: 8px 8px 8px grey;
  background-color: #E8F0F7;
}

.desktop {
display: block;
}

.mobile {
display: none;
}

.copy {
  color: #808080;
  text-align: right;
}

.copy a {
  color: #808080;
  padding: 12px 16px;
  font-size: 14px;
  text-decoration: none;
}

footer {
  clear: both;
  padding: 0px 10px;
}

.scaleA {
  width: 60%;
  max-width: 500px;
}

.scaleB {
  width: 20%;
  max-width: 300px;
}

.scaleC {
  width: 100%;
  max-width: 600px;
}

img {
  display: block;
}

.portrait {
  margin: 0 0 15px 0;
}

.nav--open {
  display: block !important;
}

.hamburger--open .bar:nth-child(1) {
   transform: translateY(7px) rotate(45deg);
}

.hamburger--open .bar:nth-child(2) {
   opacity: 0;
}

.hamburger--open .bar:nth-child(3) {
   transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 750px) {
  .desktop {
    display: block;
  }

  .mobile {
    display: none;
  }

  .nav {
    position: fixed;
    background-color: #E0E0E0;
    top: 45px;
    left: 5%;
    padding: 15px;
    display: none;
  }

  .nav__list {
    flex-direction: column;
    row-gap: 6px;
  }

  .hamburger {
    display: block;
    padding: 9px;
  }

h1 {
  font-size: 24px;
  padding: 10px 35px;   
  text-shadow: 2px 2px 1px grey;
}

h4 {
  font-size: 22px;
  padding: 10px 35px;
  text-shadow: 2px 2px 1px grey;
}
}

@media (max-width: 400px) {
  .desktop {
    display: none;
  }

  .mobile {
    display: block;
  }

  .nav {
    position: fixed;
    background-color: #E0E0E0;
    top: 45px;
    left: 5%;
    padding: 15px;
    display: none;
  }

  .nav__list {
    flex-direction: column;
    row-gap: 6px;
  }

  .hamburger {
    display: block;
    padding: 9px;
  }

h1 {
  font-size: 24px;
  padding: 10px 35px;   
  text-shadow: 2px 2px 1px grey;
}

h4 {
  font-size: 22px;
  padding: 10px 35px;
  text-shadow: 2px 2px 1px grey;
}
}