/* ============================================================
   ERGEN TECHNOVATION — nav.css
   ============================================================ */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 40px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(2,11,24,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}
nav.scrolled {
  background: rgba(2,11,24,0.98);
  box-shadow: 0 4px 40px rgba(0,0,0,0.5);
}
.nav-logo {
  height: 38px;
  cursor: pointer;
  filter: brightness(1.1);
  transition: filter 0.3s;
  display: block;
}
.nav-logo:hover {
  filter: brightness(1.3) drop-shadow(0 0 8px rgba(0,212,255,0.5));
}
.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}
.nav-links li a {
  color: var(--grey);
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 4px;
  transition: all 0.2s;
  font-family: var(--font-mono);
  border: 1px solid transparent;
  white-space: nowrap;
}
.nav-links li a:hover,
.nav-links li a.active {
  color: var(--cyan);
  border-color: var(--border-bright);
  background: rgba(0,212,255,0.05);
}
.nav-links li a.nav-cta {
  background: var(--cyan);
  color: var(--navy) !important;
  border-color: var(--cyan);
  font-weight: 700;
}
.nav-links li a.nav-cta:hover {
  background: transparent;
  color: var(--cyan) !important;
}

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--grey);
  border-radius: 2px;
  transition: all 0.3s;
}
.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: rgba(2,11,24,0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 20px;
  z-index: 999;
}
.nav-mobile.open { display: block; }
.nav-mobile ul { list-style: none; }
.nav-mobile ul li { margin-bottom: 4px; }
.nav-mobile ul li a {
  display: block;
  padding: 12px 16px;
  color: var(--grey);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 4px;
  transition: all 0.2s;
  text-decoration: none;
}
.nav-mobile ul li a:hover,
.nav-mobile ul li a.active { color: var(--cyan); background: rgba(0,212,255,0.05); }
.nav-mobile ul li a.nav-cta {
  background: var(--cyan);
  color: var(--navy);
  font-weight: 700;
  margin-top: 8px;
  text-align: center;
}

@media (max-width: 860px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}