How do i fix this stuff???

Buladistributions.com

password: hello1234

anyone know how to fix the bugs with my header and when in mobile this issue?

Also need help on this other stuff

heres all my sites code

/* Rebecca Grace Designs Mobile Banner Image */
@media only screen and (max-width: 640px) {
  #collection-66462544776b141c396831ff {
    #page .page-section:nth-of-type(1) {
      .section-background img {
        display: none !important;
      }
      .section-background {
        background: url("https://images.squarespace-cdn.com/content/66462503af4f68627ee53eb5/065b5bc5-40b5-426d-b7c2-1cc4e2bd953c/Untitled+design+%285%29.png?content-type=image%2Fpng");
        background-repeat: no-repeat;
        background-size: 100% 100%;
      }
    }
  }
}
/* REBECCA GRACE DESIGNS */
/* Shopping Cart Page */
.cart-title {
  visibility: hidden;
}
.cart-title:before {
  visibility: visible;
  content: "Your Bula Products";
}
/* REBECCA GRACE DESIGNS */
/* Shopping Cart Checkout Button */
.cart-checkout-button {
  background-color: Green !important; // background-color 
  color: white !important; // font-color
}
/* Rebecca Grace Designs Mobile Banner Image */
@media only screen and (max-width: 640px) {
  #collection-664695ed5e83ba096c1505a6 {
    #page .page-section:nth-of-type(1) {
      .section-background img {
        display: none !important;
      }
      .section-background {
        background: url("https://images.squarespace-cdn.com/content/66462503af4f68627ee53eb5/426ba184-f663-4b48-9d73-afde9411b10e/About+Us+%282%29.png?content-type=image%2Fpng");
        background-repeat: no-repeat;
        background-size: 100% 100% ;
      }
    }
  }
}

// REMOVE SHOP CATEGORY SEPARATOR

.products.collection-content-wrapper .breadcrumb-separator {

  display: none;
  
  }
// SHOP CATEGORY BUTTONS

.products.collection-content-wrapper .nested-category-breadcrumb-link,
.products.collection-content-wrapper .category-link {

border-radius: 5px;
color: White;
background-color: Green;
border: 1px solid White !important;
padding: 5px 20px !important;
margin: 10px !important;

}
// STACK SHOP CATEGORIES ON MOBILE

@media screen and (max-width: 640px) {
  .products.collection-content-wrapper .nested-category-children {
    flex-wrap: wrap;
    justify-content: center;
    overflow-x: hidden;
  }
}

/*Split navigation*/
.header-nav {
    position: absolute;
    top: 62px;
    bottom: 0;
    margin-top: 0!important;
    margin-left: -10px!important;
}

.header-nav-item:nth-of-type(6) {
    margin-right: 500px!important;
}
@media screen and (min-width: 1000px){ 
  
}
.header-title-logo a {
    z-index: 1000;
    position: relative;
}
// CROSS DISSOLVE ANIMATION
@-moz-keyframes fadeEffect{
    0% { opacity: 0; }
    5% { opacity: 0; -moz-transform: translateY(0px); }
    10% { opacity: 1; -moz-transform: translateY(0px); }
    25% { opacity: 1; -moz-transform: translateY(0px); }
    30% { opacity: 0; -moz-transform: translateY(0px); }
    80% { opacity: 0; }
    100% { opacity: 0; }
}
@-webkit-keyframes fadeEffect{
    0% { opacity: 0; }
    5% { opacity: 0; -webkit-transform: translateY(0px); }
    10% { opacity: 1; -webkit-transform: translateY(0px); }
    25% { opacity: 1; -webkit-transform: translateY(0px); }
    30% { opacity: 0; -webkit-transform: translateY(0px); }
    80% { opacity: 0; }
    100% { opacity: 0; }
}
@-ms-keyframes fadeEffect{
    0% { opacity: 0; }
    5% { opacity: 0; -ms-transform: translateY(0px); }
    10% { opacity: 1; -ms-transform: translateY(0px); }
    25% { opacity: 1; -ms-transform: translateY(0px); }
    30% { opacity: 0; -ms-transform: translateY(0px); }
    80% { opacity: 0; }
    100% { opacity: 0; }
} 
/* describe what you're hiding from desktop */

@media screen and (min-width:768px) {
section[data-section-id="6647c76ca819f5434c06e7f6"] {
    display: none;
}
}

/* describe what you're hiding from mobile */

@media screen and (max-width:767px) {
section[data-section-id="664c3e91cfc0c378a86d9f11"]{
    display: none;
}
}
@media screen and (max-width: 768px) {
.header-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(400px);
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
}
.header--menu-open .header-menu {
     transform: translateX(0);
}
.header-menu-nav-folder, .header-menu-nav-item a, .header--menu-open .header-menu .header-menu-nav-list,
.header-menu-actions, .header-menu-cta {
    transition: unset !important;
    transform: unset !important;
}}
.header-menu .header-menu-bg{
  background-image: url(https://images.squarespace-cdn.com/content/66462503af4f68627ee53eb5/371c3734-9e79-409d-96c2-dfb85f1434e3/Untitled+design-5.png?content-type=image%2Fpng);
  background-size: cover;
}
.header-nav-folder-content {

border: 1px solid gold;

}
.animated-text {
  visibility: hidden;
}
input {
  position: ;
  opacity: 0;
  z-index: -1;
}
// Layout
.row {
  display:flex;
  .col {
    flex:1;
    &:last-child {
      margin-left: 1em;
    }
  }
}

Please help