Multi level dropdown open to the left - html

Question

I have a multi-level dropdown but it opens to the right by default. I have tried to tweak it a lot but doesn't seem to work no matter what I try.
I'll provide the code here. The HTML might be a little messed up because I had to remove the rails code in there and only leave plain HTML.
The dropdowns open to the right and overflow the window. If anyone has a better way to do it, I am all ears.
.dropdown-wrapper {
ul {
list-style: none;
padding: 0;
margin: 0;
// background: #1bc2a2;
}
li>ul {
margin-right: 190px;
}
ul li {
font-size: 16px !important;
margin-top: 10px;
display: block;
position: relative;
color: goldenrod;
float: left;
min-width: 100px;
cursor: pointer;
// background: #1bc2a2;
}
ul li:not(:last-child) {
border-bottom: 1px solid goldenrod;
}
li ul {
display: none;
}
ul li a {
display: block;
padding: 10px;
text-decoration: none;
white-space: nowrap;
color: goldenrod;
border-radius: 0;
box-shadow: none;
}
ul li a:hover {
background: #FAF9F6;
border-radius: 0;
}
ul li:hover {
background: #FAF9F6;
}
li:hover>ul {
display: block;
position: absolute;
margin-left: 2px;
}
.main-navigation {
ul {
background: white;
}
}
li:hover li {
float: none;
}
// li:hover a { background: #1bc2a2; }
li:hover li a:hover {
background: #FAF9F6;
}
.main-navigation li ul li {
border-top: 0;
}
ul ul ul {
left: 100%;
top: 0;
}
ul:before,
ul:after {
content: " ";
/* 1 */
display: table;
/* 2 */
}
ul:after {
clear: both;
}
}
<ul class="main-navigation">
<li>Treatments Provided
<ul>
<li>1</li>
</li>
<li>2
<ul>
<li class="">
<a href=>a</a>
</li>
</ul>
</ul>
</li>
</ul>