style.css

#menuToggle input:checked ~ #menu .button:after {
  right: 0;
}


body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    display: flex;
    height: 100vh;
    
}

#menuToggle {
    display: block;
    background: #333;
    position: fixed;
    width: 40px;
    height: 32px;
    top: 20px;
    left: 20px;
    z-index: 1;
    -webkit-user-select: none;
    user-select: none;
    
}

#menuToggle a
{
  text-decoration: none;
  color: #232323;
  position: relative;
  left:-78px;
  transition: color 0.3s ease;
}

#menuToggle a:hover
{
  color: rgb(223, 240, 138);
}



#menuToggle input {
    display: block;
    width: 40px;
    height: 32px;
    position: absolute;
    top: -7px;
    left: -5px;
    cursor: pointer;
    opacity: 0; /* hide the original checkbox */
    z-index: 2; /* places the checkbox above the hamburger spans */
    -webkit-touch-callout: none;
    
}

#menuToggle span { /* hamburger bars */
    display: block;
    width: 33px;
    height: 4px;
    margin-bottom: 5px;
    position: relative;
    background: #cdcdcd;
    border-radius: 3px;
    z-index: 1;
    transform-origin: 4px 0px;
    transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
    background 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
    opacity 0.55s ease;
}

#menuToggle span:first-child {
    transform-origin: 0% 0%;
}

#menuToggle span:nth-last-child(2)
{
  transform-origin: 0% 100%;
}


#menu {
    position: fixed;
    width: 280px;
    background: #333;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    height: 100%;
    overflow-y: auto;
    padding-top: 180px;
    margin: -100px 0 0 -50px;
    top: 0;
    left: -200px;
    transition: all 0.3s ease-in-out;
}

#menuToggle input:checked ~ span
{
  opacity: 1;
  transform: rotate(45deg) translate(-2px, -1px);
  background: #f2f0f0;
}

#menuToggle input:checked ~ span:nth-last-child(3)
{
  opacity: 0;
  transform: rotate(0deg) scale(0.2, 0.2);
}
#menuToggle input:checked ~ span:nth-last-child(2)
{
  transform: rotate(-45deg) translate(0, -1px);
}

#menuToggle input:checked ~ #menu {
    left: 0;
}

#menu a {
    padding: 15px;
    color: #fff;
    text-align: right;
    text-decoration: none;
    font-size: 18px;
    display: block;
    transition: background 0.3s ease-in-out;
}

#menu a:hover {
    background: #555;
}


#menuToggle input:checked ~ #menu a:hover:after {
  right: 0;
}

#map-container {
    flex: 1;
    height: 100%;
}

#map {
    width: 100%;
    height: 100%;
}