/* =====================================================
   MOBILE NAV — Hamburger for small screens
   ===================================================== */

/* Hamburger button — only shown on mobile */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 250ms ease;
}

/* Hamburger open animation */
.nav-hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(var(--bg-rgb), 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  flex-direction: column;
  gap: 0.2rem;
  z-index: 99;
}

.mobile-nav.open { display: flex; }

.mobile-nav .nav-link {
  font-size: 0.9rem;
  padding: 0.65rem 0.8rem;
  border-radius: 8px;
  width: 100%;
  display: block;
  color: var(--text-secondary);
}

.mobile-nav .nav-link.active,
.mobile-nav .nav-link:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  .nav-links { display: none; }
}