/* ============================================================
   TD Medical College — Navigation Bar
   ============================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0 5%;
  height: var(--navbar-height, 72px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
  background: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

/* --- Logo / Brand --- */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-brand img {
  height: 42px;
  width: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(200, 164, 90, 0.3);
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
}

.nav-brand-text .brand-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.nav-brand-text .brand-sub {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: #c8a45a;
}

/* --- Desktop Links --- */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: #f5f0e8;
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background: #c8a45a;
  transition: width 0.3s ease;
}

.nav-links a:hover { color: #c8a45a; }

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a.active { color: #c8a45a; }

/* --- Hamburger --- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: #f5f0e8;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Mobile Menu --- */
@media (max-width: 1024px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 1rem;
    letter-spacing: 2px;
  }

  .hamburger {
    display: flex;
  }
}

/* Mobile overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}