body {
  font-family: Arial, Helvetica, sans-serif;
  color: white;
  --color-surface-100:  #121212;
  --color-surface-200:  #282828;
  --color-surface-400:  #575757;
  --color-surface-300:  #3f3f3f;
  --color-surface-500:  #717171;
  --color-surface-600:  #8b8b8b;

  --color-primary-100:  #ffffff;

  background-color: var(--color-surface-100)

}

.header {
  margin-left: 220px;
  margin-right: 20px;
  padding: 10px;
  border-bottom: 2px solid var(--color-surface-200);
}

.header h1 a{
  font-size: 40px;
  text-decoration: none;
  color: white;
}

.sidenav {
  background-color: var(--color-surface-200); /* Black*/
  width: 200px;
  height: 100%;
  position: fixed; top: 0px; left: 0px;
  margin: 0;
  padding: 0;
}

.sidenav h2 {
  padding: 10px 10px 10px 10%;
  font-size: 30px;
}

/* The navigation menu links */
.sidenav a {
  padding: 10%;
  text-decoration: none;
  font-size: 25px;
  color: white;
  display: block;
  border-radius: 10px;
  cursor: pointer;
}

input[type=search] {
  width: 400px;
  margin-left: 10px;
  margin-right: 10px;
  background-color: var(--color-surface-300);
  padding: 12px 20px;
  margin: 0px 0;
  border: 0;
  border-radius: 5px;
  box-sizing: border-box;
  color: white;
}

::placeholder {
  color: white;
  opacity: 1; /* Firefox */
}

button {
  color: white;
  padding: 10px;
  margin-left: 10px;
  border: 0;
  border-radius: 5px;
  background-color: var(--color-surface-400);
  position: absolute;
}

form {
  display: inline-block;
}

ul {
  padding: 0;
}

li {
  display: inline-block;
  padding: 20px;
  background-color: var(--color-surface-300);
  border-radius: 10px;
  margin: 10px;
}

/* When you mouse over the navigation links, change their color */
.sidenav a:hover {
  background-color: var(--color-surface-400);
}
  
.content {
  margin-left: 230px;
  margin-top: 50px;
  font-size: 20px;
}
  /* On smaller screens, where height is less than 450px, change the style of the sidenav (less padding and a smaller font size) */
  @media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px;}
    .sidenav a {font-size: 18px;}
  } 

@media only screen and (max-width: 600px) {

  .header {
    margin-left: auto;
    margin-right: auto;
    padding: 0;
    border-bottom: none;
    text-align: center;
    background-color: var(--color-surface-200);
    position: fixed; top: 0px; left: 0px; right: 0px;
  }

  .header h1 {
    margin: 10px;
  }
  
  .header h1 a{
    font-size: 25px;
    text-decoration: none;
    color: white;
  }
  
  .sidenav {
    height: 70px;
    margin: 0;
    padding: 0;
    overflow: hidden;
    position: fixed; 
    top: auto;
    bottom: 0;
    width: 100%;
    list-style-type: none;
    display: inline-block;
    text-align: center;
  }
  .sidenav h2 {
    margin: auto;
    text-align: center;
    padding: 0;
    font-size: 0px;
  }
  
  /* The navigation menu links */
  .sidenav a {
    padding: 10px;
    padding-left: 15px;
    padding-right: 15px;
    text-decoration: none;
    font-size: 5.5vmin;
    border-radius: 10px;
    display: inline-block;
    margin-left: 10px;
    margin-right: 10px;
    cursor: pointer;
  }
  
  /* When you mouse over the navigation links, change their color */
  .sidenav a:hover {
    background-color: var(--color-surface-400);
    padding-bottom: 15px;
  }

  .content {
    margin-left: 0px;
    margin-top: 80px;
    font-size: 20px;
  }

  input[type=search] {
    width: 80%;
    margin-left: 10px;
    margin-right: 10px;
    background-color: var(--color-surface-300);
    padding: 12px 20px;
    margin: 0px 0;
    border-radius: 5px;
    box-sizing: border-box;
    color: white;
    text-transform: lowercase;
  }
  
  ::placeholder {
    color: white;
    opacity: 1; /* Firefox */
  }
  
  button {
    color: white;
    padding: 10px;
    margin-left: 10px;
    border: 0;
    border-radius: 5px;
    background-color: var(--color-surface-400);
    position: absolute;
  }

  form {
    margin: 10px;
    display: inline-block;
    width: 100%;
    position: fixed;
  }

  ul {
    padding: 0;
    margin-top: 65px;
  }

  li {
    text-align: center;
    display: block;
    padding: 20px;
    background-color: var(--color-surface-300);
    border-radius: 10px;
    margin-top: 10px;
    margin-bottom: 10px;
    position: relative;
    z-index: -2;
    
  }

  p {
    font-size: 0px;
    margin: 0px;
  }
}