body {
  margin: 0;
  padding: 0;
  background-color: black;
  font-family: 'IBM Plex Sans', sans-serif;
}

#one:hover {
  background-color: #66ccff;
}

#two:hover {
  background-color: #99ff99;
}

#three:hover {
  background-color: #ffff66;
}

.topnav {
  overflow: hidden;
  background-color: black;
}

.topnav a {
  float: right;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.active {
  background-color: #4CAF50;
  color: white;
}

.topnav img {
	height: 20px;
	padding: 10px;
}

.topnav .icon {
  display: none;
}

.topnav a:hover {
  background-color: #ff6666;
  color: black;
}

.topnav img:hover {
	cursor: pointer;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {
    display: none;
  }
  .topnav a.icon {
    float: center;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: center;
  }
  .topnav.responsive {float: none;}
  .topnav.responsive {position: relative;}
  .topnav.responsive {
    display: block;
    width: 100%;
    text-align: left;
  }
}

.grid-container {
  display: grid;
  grid-template-rows: 220px 220px;
  grid-template-columns: 30% 30% 30%;
  grid-gap: 20px;
  justify-content: center;
}

.grid-itemfull {
  text-align: center;
  grid-column-start: 1; 
  grid-column-end: 4;
  justify-content: center;
}

@media screen and (max-width: 600px) {
  .grid-container {
    display: grid;
    grid-template-rows: 220px 220px;
    grid-template-columns: 40% 40%;
    grid-gap: 20px;
    justify-content: center;
  }
  .grid-itemfull {
  text-align: center;
  grid-column-start: 2;
  grid-column-end: 3;
  justify-content: center;
  }
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

button {
	border: none;
	background: black;
}

h1 {
  color: lightgrey;
  text-align: center;
  margin-left: 20px;
  margin-right: 20px;
}

p {
  color: white;
  text-align: center;
  margin-left: 20px;
  margin-right: 20px;
  font-family: "Courier New", Courier, monospace;
}

a {
  color: white;
  text-decoration: none;
}

a:hover {
  color: #ff6666;
  text-decoration: none;
}