body.mobile-page #site-nav {
  display: none;
}

@media (max-width: 1200px) {

  /* Show full-screen overlay when open */
  body.mobile-page #site-nav.open {
    display: flex;
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.75rem;
    z-index: 99998; /* above content, below button */
  }


  /* Hamburger button */
  body.mobile-page .menu-toggle {
    display: inline-flex;
    position: fixed;
    top: 14px;
    right: 16px;
    width: 44px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    z-index: 99999;
  }

  .menu-toggle .menu-bar {
    position: absolute;
    left: 10px;
    right: 10px;
    height: 2px;
    background: #fff;
    transition: transform 0.25s ease, top 0.25s ease, opacity 0.2s ease;
  }
  .menu-toggle .menu-bar:nth-child(1) { top: 10px; }
  .menu-toggle .menu-bar:nth-child(2) { top: 17px; }
  .menu-toggle .menu-bar:nth-child(3) { top: 24px; }

  .menu-toggle[aria-expanded="true"] .menu-bar:nth-child(1) {
    top: 17px;
    transform: rotate(45deg);
  }
  .menu-toggle[aria-expanded="true"] .menu-bar:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] .menu-bar:nth-child(3) {
    top: 17px;
    transform: rotate(-45deg);
  }
}
.menu-toggle { position: relative; overflow: hidden; } 

.menu-star {
  position: absolute;
  inset: 0;         
  width: 28px;
  height: 28px;
  margin: auto;
  fill: #ffffff;      
  opacity: 0;         
  transform: scale(0.2) rotate(-20deg);
  transition:
    opacity .38s cubic-bezier(.2,.7,0,1),
    transform .58s cubic-bezier(.16,1,.3,1);
  pointer-events: none;
  filter: drop-shadow(0 6px 16px rgba(255,213,74,.35));
}
.menu-toggle[aria-expanded="true"] .menu-bar {
  opacity: 0;
  transform: scaleX(.3);
}
.menu-toggle[aria-expanded="true"] .menu-star {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

@media (min-width: 1200px) {
  body.mobile-page #site-nav {
    display: flex;
    position: static;
    background: transparent;
    width: auto;
    height: auto;
  }
}

@media (min-width: 901px) {
  .menu-toggle {
    display: none;
  }
}

@media (max-width: 1600px) {
  .research-sect {
  width: 100%;
  }
  .research__p {
    font-size: 1.5rem;
  }
  .research__title {
    font-size: 4rem;
  }
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 3rem;
}

.non-visible {
  display: none;
}

.mobile-a,
.mobile-a:link,
.mobile-a:visited {
  font-weight: bold;
  color: white !important;
  text-decoration: none !important;
  border-bottom: none !important;
}

.mobile-a:hover,
.mobile-a.active {
  color: #ffd700 !important;
  border-bottom: 2px solid #ffd700 !important;
}