Burger menu not going to correct position - html

Question

I have made a burger menu for my site but the dropdown menu/ element does not go inside the menu icon. It moves the wrong way. It goes from left to right but I need it to go from right to left. I can't figure out how to make the menu move the other way. I have tried to tweak some of the tags but either it's not worked or it's broken.
nav {
position: absolute;
top: -2%;
left: 93%;
}
#menuToggle {
display: block;
position: relative;
top: 50px;
left: 50px;
z-index: 1;
-webkit-user-select: none;
user-select: none;
}
#menuToggle a {
text-decoration: none;
color: #232323;
transition: color 0.3s ease;
}
#menuToggle a:hover {
color: tomato;
}
#menuToggle input {
display: block;
width: 40px;
height: 32px;
position: absolute;
top: -7px;
left: -5px;
cursor: pointer;
opacity: 0;
z-index: 2;
-webkit-touch-callout: none;
}
#menuToggle span {
display: block;
width: 33px;
height: 4px;
margin-bottom: 5px;
position: relative;
background: #ffffff;
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%;
}
#menuToggle input:checked~span {
opacity: 1;
transform: rotate(45deg) translate(-2px, -1px);
background: #232323;
}
#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);
}
#menu {
position: absolute;
width: 300px;
margin: -100px 0 0 -50px;
padding: 50px;
padding-top: 125px;
background: #ffffff;
list-style-type: none;
-webkit-font-smoothing: antialiased;
transform-origin: 0% 0%;
transform: translate(-100%, 0);
transition: transform 0.5s cubic-bezier(0.77, 0.2, 0.05, 1.0);
}
#menu li {
padding: 10px 0;
font-size: 22px;
}
#menuToggle input:checked~ul {
transform: none;
}
<nav role="navigation">
<div id="menuToggle">
<input type="checkbox" />
<span></span>
<span></span>
<span></span>
<ul id="menu">
<li>Home</li>
<li>About us</li>
<li>Rules</li>
<li>Support us</li>
</ul>
</div>
</nav>
any help is greatly appreciated, thank you