index.css

body {
  font-family: Monocraft, sans-serif;
  margin: 0;
  padding: 0;
  background-color: rgb(29, 31, 45);
}

#navbar {
  display: flex;
  justify-content: space-between;
  position: fixed;
  background-color: rgb(54, 85, 136);

  top: 0;
  left: 0;
  right: 0;
  color: #eaeaea;
}

#navbar .logo,
#navbar .items a {
  padding: 1.25rem 1rem;
}

#navbar .items {
  display: flex;
  gap: 1rem;
}

.items a:hover {
  color: rgb(196, 188, 79);
}

#navbar .hamburger {
  fill: #eaeaea;
  display: none;
}
#navbar .hamburger:hover {
  cursor: pointer;
}

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

main {
  padding: 1rem;
  padding-top: 4rem;
  color: rgb(196, 188, 79);
}

.row {
  display: flex;
  flex-wrap: wrap;
}

.column {
  flex: 25%;
  padding: 20px;
  margin: 0.25rem;
  background-color: rgba(54, 85, 136, 0.4);
  border-radius: 8px;
}

@media screen and (max-width: 600px) {
  #navbar .items {
    display: none;
  }
  #navbar .hamburger {
    display: block;
  }
  .row {
    flex-direction: column;
  }
}

@media screen and (max-width: 600px) {
  #navbar.responsive {
    justify-content: center;
    flex-direction: column;
  }

  #navbar.responsive .items {
    background-color: rgb(24, 28, 77);
    display: flex;
    gap: 0;
    flex-direction: column;
  }
  #navbar.responsive .items a {
    padding-top: 1rem;
    padding-bottom: 1rem;
  }
  #navbar .hamburger {
    position: absolute;
    right: 1rem;
    top: 1.25rem;
  }
}

@media screen and (max-width: 992px) {
  .column {
    flex: 48%;
  }
}