grid.css

body {
  width: 100%;
  height: 100px;
  background-color: white;
  margin: 0;
  position: relative;
}

nav {
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 2%;
  margin: 0;
  text-align: right;
}

nav a {
  text-decoration: none;
  background-color: hsla(184, 100%, 22%, 0.856);
  color: hsl(0, 0%, 95%);
  border-radius: 10px;
  width: 15%;
  padding: 1% 2%;
}

nav a:hover {
  background-color: rgb(63, 160, 63);
}
main {
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 0);
}
.main-container {
  width: 70%;
  display: grid;
  grid-template-areas:
    "t t t o"
    "t t t o"
    "b b i i"
    "b b e e"
    "b b e e";
  column-gap: 10px;
  row-gap: 10px;
  margin: 0 auto;
}

.first-container {
  padding: 7em;
  background-color: orangered;
  grid-area: t;
}

.second-container {
  padding: 2em;
  background-color: orange;
  grid-area: o;
}

.third-container {
  padding: 7em;
  background-color: green;
  grid-area: b;
}

.fourth-container {
  padding: 2em;
  background-color: hsla(184, 100%, 22%, 0.856);
  grid-area: i;
}

.fifth-container {
  padding: 2em;
  background-color: hsla(184, 100%, 22%, 0.856);
  grid-area: e;
}