/* Shared navigation styles */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
  display: none;
}

.nav-overlay.open {
  display: block;
}

.main-nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  gap: 10px;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
  border-radius: 30px;
  padding: 10px 20px;
  border: 2px solid rgba(255,255,255,0.5);
  transition: left .3s;
}

.hamburger {
  display: none;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 101;
  padding: 8px 10px;
  font-size: 1.5rem;
  color: #fff;
  background: rgba(255,255,255,0.2);
  border: 2px solid rgba(255,255,255,0.5);
  border-radius: 6px;
  cursor: pointer;
}

.main-nav .nav-btn {
  white-space: nowrap;
  padding: .4rem .8rem;
  font-size: 1rem;
  color: #fff;
  text-decoration: none;
  border-radius: 30px;
  border: 2px solid rgba(255,255,255,0);
  background: rgba(255,255,255,0);
  transition: background .3s, border-color .3s;
}

.main-nav .nav-btn:hover,
.main-nav .nav-btn:focus {
  background: rgba(255,255,255,0.3);
  border-color: #fff;
  outline: none;
}

.main-nav .nav-btn.active {
  background: rgba(255,255,255,0.6);
  border-color: #fff;
  box-shadow: 0 0 10px rgba(255,255,255,0.5);
  border-radius: 50px / 100%;
  transform: scale(1.05);
  pointer-events: none;
}

@media (max-width: 768px) {
  .hamburger { display: block; }
  .main-nav {
    flex-direction: column;
    top: 0;
    bottom: 0;
    left: -100%;
    transform: none;
    right: auto;
    width: 70vw;
    /* Ensure the first menu item appears below the hamburger button */
    padding-top: 80px;
    border-radius: 0;
  }
  .main-nav.open { left: 0; }
  body.nav-open .nav-overlay { display: block; }
  body.nav-open { overflow: hidden; }
  .main-nav .nav-btn {
    width: 100%;
    text-align: left;
  }
}