.menu-btn,
.menu-btn *,
nav * {
  padding: 0;
  margin: 0;
}

#menu_toggle {
  opacity: 0;
  visibility: hidden;
  display: none;
}

.menu-btn {
  background: rgba(250, 250, 250, 0.5);
  display: flex;
  align-items: center;
  width: 46px;
  height: 46px;
  cursor: pointer;
  position: sticky;
  top: 0;
  left: 100%;
  z-index: 1001;
}

.menu-btn>span,
.menu-btn>span::before,
.menu-btn>span::after {
  transition: all 0.2s linear;
  display: block;
  position: absolute;
  width: 100%;
  height: 4px;
  background-color: #616161;
}

.menu-btn>span::before {
  content: '';
  top: -14px;
}

.menu-btn>span::after {
  content: '';
  top: 14px;
}

.menu-btn:hover>span,
.menu-btn:hover>span::after,
.menu-btn:hover>span::before {
  background-color: #4654d6;
}

#menu_toggle:checked~.menu-btn>span,
#menu_toggle:checked~.menu-btn>span::before,
#menu_toggle:checked~.menu-btn>span::after {
  background-color: #9b3030;
}

#menu_toggle:checked~.menu-btn>span {
  transform: rotate(45deg);
}

#menu_toggle:checked~.menu-btn>span::before {
  top: 0;
  transform: rotate(0);
}

#menu_toggle:checked~.menu-btn>span::after {
  top: 0;
  transform: rotate(90deg);
}