nav.css

header.main {
  padding: 30px;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: #6204bf;
  z-index: 9;
  position: fixed;
  width: 100%;
  height: 100px;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0px 0px 3px 1px #6204bf;

}

header.main .container {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header.main a.logo {
  display: flex;
  align-items: center;
}

header.main a.logo img {
  height: 68px;
}

.sidenav {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  background-color: #111111;
  overflow-x: hidden;
  transition: 0.5s;
  padding-top: 60px;
}

.sidenav-open {
  width: 250px;
}

.sidenav a {
  padding: 8px 8px 8px 32px;
  text-decoration: none;
  text-transform: uppercase;
  color: #818181;
  display: block;
  transition: 0.3s;
}

.sidenav a:hover, .sidenav a.active {
  color: #ffffff;
}

.nav-toggle {
  font-size: 30px;
  cursor: pointer;
}

.sidenav .closebtn {
  position: absolute;
  top: 25px;
  right: 25px;
  font-size: 3rem;
  margin-left: 50px;
}

@media screen and (min-width: 768px) {
  .sidenav {
    width: auto;
    position: static;
    height: 46px;
    overflow: hidden;
    background-color: transparent;
    transition: 0.5s;
    padding-top: 0;
  }

  .sidenav a {
    display: inline-block;
    color: #ccc;
    transition: 0.3s color;
  }

  .sidenav a:hover, .sidenav a.active {
    color: #fff;
  }

  .sidenav .closebtn {
    display: none;
  }

  .nav-toggle {
    display: none;
  }
}

@media screen and (min-width: 1350px) {
  header.main .container {
      width: 80%;
      margin: 0 auto;
  }
}