header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  pointer-events: none;
  z-index: 10;
  color: var(--color);
  --menu-btn-size: 3rem;
}
.has_page_header header {
  position: fixed;
}
header.inverted {
  --color: var(--color-white);
  --color-background: var(--color-grey);
}
#header_inner {
  display: flex;
  justify-content: space-between;
  align-items: start;
  padding: var(--header-padding-top) var(--header-padding-sides) var(--header-padding-bottom);
}
.has_page_header #header_inner {
  background: linear-gradient(rgba(0, 0, 0, 0.5), transparent);
}
.main_nav_item, .main_sub_nav_item, #menu_btn {
  pointer-events: all;
}


/* TOP BAR */

#top_bar {
  height: 2.5rem;
  display: flex;
  background-color: var(--color-grey-blur);
  backdrop-filter: blur(20px);
  color: var(--color-white);
  align-items: center;
  gap: 2rem;
  font-size: var(--font-size-small);
  padding: 0 var(--header-padding-sides);
  pointer-events: all;
}
#top_bar .icon {
  color: white;
  height: 1.1em;
  margin-right: .5em;
}


/* LOGO */

#logo_link {
  width: var(--logo-width);
  pointer-events: all;
  min-width: 8rem;
}
#logo {
  width: 100%;
}


/* NAV */

#nav_wrapper, #main_nav {
  display: flex;
  align-items: center;
  font-weight: var(--strong-font);
}
#header_inner, #nav_wrapper, #main_nav, #main_nav_list {
  gap: 2em;
}
#main_nav_list {
  display: flex;
  align-items: center;
}
@media (hover: hover) {
  .nav_link:hover {
    text-decoration: underline;
    text-underline-offset: .5em;
    text-decoration-thickness: 2px;
    text-decoration-skip-ink: none;
  }
}
.main_nav_item {
  position: relative;
}
.main_sub_nav_list {
  display: none;
}
.main_nav_item:hover .main_sub_nav_list,
.main_sub_nav_list:hover {
  display: flex;
}
.main_sub_nav_list {
  position: absolute;
  top: 0;
  left: 0;
  padding-top: 2.55em;
  flex-direction: column;
  gap: 1.2em;
}
#main_nav .nav_item {
  white-space: nowrap;
}
#home_nav_item {
  display: none;
}
.inverted .main_sub_nav_item {
  text-shadow: 0 0 10px rgba(0, 0, 0, .5);
}




/* MOBILE NAV */

#menu_btn, #close_menu_btn {
  position: relative;
  display: none;
  width: var(--menu-btn-size);
  height: calc(var(--menu-btn-size) / 3);
  border-top: 2px solid var(--color);
  border-bottom: 2px solid var(--color);
  text-indent: -9999px;
}
#menu_btn:after {
  position: absolute;
  content: '';
  width: 100%;
  height: 2px;
  background-color: var(--color);
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}
#close_menu_btn {
  position: fixed;
  top: 3rem;
  right: var(--site-padding-sides);
  height: var(--menu-btn-size);
  border: none;
}
#close_menu_btn:after, #close_menu_btn:before {
  position: absolute;
  content: '';
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  z-index: 1;
}
#close_menu_btn:before {
  transform: translate(-50%, -50%) rotate(-45deg);
}

@media (max-width: 1023px) {

  #top_bar {
    justify-content: space-between;
  }
  #menu_btn {
    display: block;
  }
  .nav_open #close_menu_btn {
    display: block;
  }
  #main_nav {
    display: none;
  }
  .nav_open #main_nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-grey);
    color: var(--color-white);
    justify-content: center;
    z-index: 200;
    overflow-y: auto;
    pointer-events: all;
    padding: 7rem 0;
    display: block;
    font-size: 1.5em;
  }
  #main_nav_list {
    flex-direction: column;
    pointer-events: none;
  }
  #home_nav_item {
    display: block;
  }
  .main_sub_nav_list {
    --gap: 1em;
    display: flex;
    position: static;
    padding-top: var(--gap);
    gap: var(--gap);
  }
  .main_sub_nav_item {
    font-weight: normal;
  }
  .social_link .icon {
    filter: invert(1) brightness(2);
  }
  .inverted .main_sub_nav_item {
    text-shadow: none;
    font-weight: 300;
  }

}




/* CTA */

#cta_btn {
  border: 2px solid var(--color);
  padding: .25em .5em;
  cursor: pointer;
  white-space: nowrap;
}
@media (hover: hover) {
  #cta_btn:hover {
    background-color: var(--color);
    color: var(--color-background);
  }
}





/* SOCIAL */

.social_link .icon {
  height: 1.6em;
}
header.inverted .social_link .icon {
  filter: invert(1) brightness(2);
}