section {
    height: 100vh;
  }

  nav {
    position: fixed;
    background-color: #7386D5;
    color: white;
  }
  .container{
    min-height: 100%;
    height: 100%;
  }

.menu {
display: block;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.overlay {
  position: absolute; /* Stay in place */
  z-index: 10; /* Sit on top */
  overflow-x: hidden; /* Disable horizontal scroll */
}
.overlay-content {
    position: absolute;
    z-index: 8;
    overflow: hidden;
}