style.css

* {
  margin: 0;
  box-sizing: border-box;
}
body {
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, yellow, pink) no-repeat;
}

#container {
  width: 100%;
  height: 100vh;
} 

aside {
  padding: 1em;
  width: 100%;
  display: grid;
  grid-template-columns: auto 50px;
  font-size: 1.5em;
  align-items: center;
}

main {
  overflow: auto;
  max-height: calc(100vh - 100px);
}

#user {
  display: grid;
  grid-template-columns: 60px auto;
  align-items: center;
  color:   maroon;
}

#user img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

#hamburger {
  width: 50px;
  height: 50px;
  cursor: pointer;
}

.active {
  display: block;
  position: absolute;
  top: 100px;
  right: 0;
  background: rgb(255,255,255,0.8);
  width: 50%;
  height: calc(100vh - 100px);
}

nav {
  display: none;
  padding: 1em;
}

ul {
  padding: 0;
}

nav ul li {
  list-style: none;
  margin: 0;
  width: 80px;
}

nav ul li a {
  text-decoration: none;
  color: darkblue;
  width: 200px;
}

nav ul li a:hover {
  color: green;
}

main p {
  margin: 20px 50px;
}

@media only screen and (min-width: 768px) {
  main {
    overflow: auto;
    max-height: calc(100vh - 280px);
  }
  aside {
    grid-template-columns: auto 500px;
    align-items: start;
  }

  #hamburger {
    display: none;
  }

  #user {
    display: flex;
    flex-direction: column;
    margin: 30px 0 0 100px;
    align-items: start;
  }

  #user div {
    margin-top: 10px;
    font-size: 1.4em;
    /* height: 100px; */
    justify-content: flex-start;
  }

  #user img {
    width: 150px;
    height: 150px;
    border-radius: 5%;
  }

  nav {
    display: inline;
  }

  ul {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
  }

  ul li {
    display: inline-block;
    margin: 1.5em auto;
  }

  main p {
    margin: 20px 70px;
  }
}