/* ===== SMOOTH SCROLL ===== */
html { scroll-behavior: smooth; }

/* Compensar header fijo */
#about, #areas, #team, #contact {
  scroll-margin-top: 80px;
}

/* ===== ACTIVE NAV LINKS ===== */
.nav-link {
  opacity: 0.65;
  transition: opacity 0.2s ease, border-bottom 0.2s ease;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.nav-link.active,
.nav-link:hover {
  opacity: 1;
}
.nav-link.active {
  border-bottom-color: rgba(255,255,255,0.4);
}

/* ===== SCROLL TO TOP BUTTON ===== */
#scrollTopBtn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 50;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, background 0.2s ease, transform 0.2s ease;
}
#scrollTopBtn.visible {
  opacity: 1;
  pointer-events: auto;
}
#scrollTopBtn:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

/* ===== DRAWER OVERLAY ===== */
#drawerOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 190;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
#drawerOverlay.visible {
  opacity: 1;
  pointer-events: auto;
}