body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

nav#mobile-menu {
  background-color: #333;
  position: relative;
}

nav#mobile-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  display: none;
}

nav#mobile-menu ul li {
  display: block;
}

nav#mobile-menu ul li a {
  color: white;
  text-decoration: none;
  padding: 15px 20px;
  display: block;
}

nav#mobile-menu ul li a:hover {
  background-color: #555;
}

.menu-btn {
  display: block;
  cursor: pointer;
  width: 30px;
  height: 30px;
  position: absolute;
  top: 15px;
  right: 20px;
}

.menu-btn div {
  width: 100%;
  height: 4px;
  background-color: black;
  margin: 6px 0;
  transition: 0.3s;
}

/* Alternative */

.menu-btn {
  display: block;
  cursor: pointer;
  width: 30px;
  height: 30px;
  position: absolute;
  top: 15px;
  right: 20px;
  & div {
    width: 100%;
    height: 4px;
    background-color: white;
    margin: 6px 0;
    transition: 0.3s;
  }
}
/* ---------------------------------------- */
#menu-toggle {
  display: none;
}

#menu-toggle:checked + .menu-btn div:nth-child(1) {
  transform: rotate(-45deg) translate(-9px, 5px);
  background-color: white;
}

#menu-toggle:checked + .menu-btn div:nth-child(2) {
  opacity: 0;
}

#menu-toggle:checked + .menu-btn div:nth-child(3) {
  transform: rotate(45deg) translate(-9px, -5px);
  background-color: white;
}

#menu-toggle:checked ~ ul {
  display: flex;
}

/* Alternative */

#menu-toggle {
  display: none;
  &:checked + .menu-btn div:nth-child(1) {
    transform: rotate(-45deg) translate(-9px, 5px);
  }
  &:checked + .menu-btn div:nth-child(2) {
    opacity: 0;
  }
  &:checked + .menu-btn div:nth-child(3) {
    transform: rotate(45deg) translate(-9px, -5px);
  }
  &:checked ~ ul {
    display: flex;
  }
}

/* ---------------------------------------- */
@media screen and (min-width: 993px) {
  nav#mobile-menu ul {
    display: flex;
    flex-direction: row;
    justify-content: center;
  }

  nav#mobile-menu ul li {
    display: inline-block;
  }

  nav#mobile-menu ul li a {
    padding: 15px 20px;
  }

  .menu-btn {
    display: none;
  }
}

/* Alternative */
@media screen and (min-width: 993px) {
  nav#mobile-menu ul {
    display: flex;
    flex-direction: row;
    justify-content: center;
    & li {
      display: inline-block;
      & a {
        padding: 15px 20px;
      }
    }
  }
  .menu-btn {
    display: none;
  }
}