/* ── Main navigation dropdown ──────────────────────────────────────────────
   Styles the sub-menu that layouts/partials/site-navigation.html renders for
   any main-menu entry that has children (currently Achievements → Thesis,
   Video). Loaded site-wide through the custom_css list in hugo.toml. */

.site-nav-item { position: relative; }

.site-nav-caret {
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 0.4em;
  border-style: solid;
  border-width: 0.32em 0.3em 0;
  border-color: currentColor transparent transparent;
  vertical-align: middle;
  transition: transform 0.2s ease;
}

.site-nav-item--has-children:hover .site-nav-caret,
.site-nav-item--has-children:focus-within .site-nav-caret,
.site-nav-item--open .site-nav-caret { transform: rotate(180deg); }

.site-nav-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 70;
  min-width: 190px;
  margin: 0;
  padding: 0.35rem 0;
  list-style: none;
  background: #fff;
  border-radius: 6px;
  border-top: 3px solid #ED1A3B;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

/* Hover, keyboard focus, and the script's tap toggle all open the panel. */
.site-nav-item--has-children:hover > .site-nav-dropdown,
.site-nav-item--has-children:focus-within > .site-nav-dropdown,
.site-nav-item--open > .site-nav-dropdown { display: block; }

.site-nav-dropdown-link {
  display: block;
  padding: 0.55rem 1.1rem;
  font-size: 0.95rem;
  line-height: 1.3;
  color: #1a1a1a !important;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav-dropdown-link:hover,
.site-nav-dropdown-link:focus {
  background: #f4f6f8;
  color: #c01632 !important;
}

/* Below the flex-l breakpoint the nav stacks, so the panel sits in the flow
   rather than floating over the hero image. */
@media screen and (max-width: 59.99em) {
  .site-nav-item { display: block !important; padding-right: 0 !important; }

  .site-nav-dropdown {
    position: static;
    min-width: 0;
    margin: 0.25rem 0 0.5rem;
    padding: 0.25rem 0;
    background: rgba(255, 255, 255, 0.12);
    border-top: none;
    border-radius: 4px;
    box-shadow: none;
  }

  .site-nav-dropdown-link { color: #fff !important; padding: 0.5rem 0.85rem; }

  .site-nav-dropdown-link:hover,
  .site-nav-dropdown-link:focus {
    background: rgba(255, 255, 255, 0.2);
    color: #fff !important;
  }
}