Евгений

html,
body {
   scroll-behavior: smooth;
}

.userIcon {
    width: 50px;
    height: 50px;

    border-radius: 50%;
    background-color: darken($base-color, 30%);

    overflow: hidden;

    display:flex;

    img{
      margin: auto;
      max-width: 100%;
      max-height: 100%;
    }
}

.container {
    width: 600px;
    margin: auto;
    border: 1px solid black;
    padding: 5px
}

.container input {
  display: inline-block;
}

@media only screen and (max-width: 768px)
.main-navigation.toggled-on .sub-menu {
    display: none;
}