Mysterious gap in mobile navigation

My website is kofiperry.com

I'm trying to style my navigation menu in the mobile version of my site to look vertically aligned with the text on my "about/contact" page. As of now I can't get it to go left enough, and the words "about/contact" are somehow further right of the "selected works" link above it. Could anyone please help? I've tried messing with spacing in my site styles and adjusting margins/padding in my custom css codes. I suspect one block of code is the culprit:

Quote

@media screen and (max-width:1024px) {
.header-nav {
   display: flex !important;
    margin-right: 90% !important;
    margin-left: auto !important;
}
.header-burger {
    display: none !important;
}

So make these items same line or?

Hmm, that's not what I get on mobile. These pictures show what I see on my phone. I want the bottom line "about/contact" to be in the same line as "selected works", and for both of them to be in the same line as the first words of my bio.  

This is all the code I have

Quote

/* remove portfolio pagination */
.item-pagination[data-collection-type^="portfolio"], .item-pagination[data-collection-type^="portfolio"] {
    display: none;
}
div.portfolio-text {
    display: none;
}
div.header-nav-item--active a {
    background-image: none !important;
}
.header-nav-folder-item--active .header-nav-folder-item-content {
  background: none !important;
}
@media screen and (max-width:1024px) {
.header-nav {
   display: flex !important;
    margin-right: 90% !important;
    margin-left: auto !important;
}
.header-burger {
    display: none !important;
}
a#site-title {
    white-space: nowrap; max-width: 50px
}
}
/* Float header */
@media screen and (min-width:992px) {
  .header-title {
    position: fixed;
    top: 4vw;
    left: 5vw;
    z-index: 9999;
}
.header-nav {
    position: fixed;
    top: 15%;
    left: 10%;
    padding: 0 !important;
    transform: translateY(-90%);
}
  nav {
    flex-direction: column;
  }
  div.header-nav-item {
    margin: 0 !important;
    text-align: left !important;
}
  div.header-nav-item  a{
   display: inline-block;
}
.header-actions.header-actions--right {
    position: fixed;
    left: 1vw;
    bottom: 5vw;
    justify-content: flex-start !important;
}
.header-actions--right .header-actions-action a {
    margin-left: 0 !important;
    margin-right: 2.5vw;
}
}
.header-title {
   display: none !important;
}

Thank you so much!