/* ═══════════════════════════════════════════
   ICETCSE-2027 | Navbar Styles
   navbar.css
═══════════════════════════════════════════ */

/* ── NAVBAR ── */
#navbar {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10,22,40,0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: all 0.3s ease;
}
#navbar.scrolled {
  background: rgba(10,22,40,0.99);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1rem;
}

/* Brand */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-mitk-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
}
.nav-brand-sep {
  width: 1px;
  height: 28px;
  background: rgba(255,255,255,0.15);
}
.nav-brand-text { display: flex; flex-direction: column; }
.nav-brand-name {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 1px;
  line-height: 1.2;
}
.nav-brand-sub {
  font-size: 10px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.3px;
}

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: rgba(255,255,255,0.65);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: rgba(232,160,32,0.08);
}

/* Right side */
.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.nav-elsevier-logo {
  height: 44px;
  width: auto;
  object-fit: contain;
  opacity: 0.8;
  filter: brightness(1.15);
  transition: opacity 0.2s;
}
.nav-elsevier-logo:hover { opacity: 1; }
.nav-cta {
  background: var(--accent);
  color: var(--navy) !important;
  padding: 8px 18px !important;
  border-radius: 6px !important;
  font-weight: 700 !important;
  font-size: 13px !important;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--accent2) !important;
  color: var(--navy) !important;
}

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.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;
  flex-direction: column;
  background: rgba(10,22,40,0.99);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 1rem 2rem 1.5rem;
  gap: 0.25rem;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: color 0.2s;
}
.nav-mobile a:hover { color: var(--accent); }
.nav-mobile .nav-cta {
  background: var(--accent);
  color: var(--navy) !important;
  text-align: center;
  border-radius: 6px !important;
  padding: 12px !important;
  margin-top: 0.5rem;
  border-bottom: none !important;
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .nav-links { gap: 0; }
  .nav-links a { font-size: 12px; padding: 6px 8px; }
}
@media (max-width: 768px) {
  .nav-links, .nav-right { display: none; }
  .nav-hamburger { display: flex; }
  .nav-inner { height: 60px; }
}