/* =============================================
   NAVBAR STYLES
   ============================================= */

/* ---- Top Bar ---- */
.topbar {
  background: var(--clr-primary-dark);
  color: rgba(255,255,255,0.75);
  font-size: var(--fs-xs);
  letter-spacing: 0.03em;
  padding-block: var(--sp-2);
  display: none; /* Show on larger screens */
}
@media (min-width: 768px) { .topbar { display: block; } }

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.topbar a {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  color: rgba(255,255,255,0.72);
  transition: color var(--transition-fast);
}
.topbar a:hover { color: var(--clr-accent-light); }

.topbar .social-links {
  display: flex;
  gap: var(--sp-3);
}
.topbar .social-links a {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}
.topbar .social-links a:hover {
  background: var(--clr-accent);
  color: var(--clr-dark);
}

/* ---- Main Navbar ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--clr-white);
  box-shadow: 0 2px 0 var(--clr-border);
  height: var(--nav-height);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-8);
}

/* ---- Logo ---- */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
  text-decoration: none;
}

.nav-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(26,58,110,0.15));
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-text .college-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-primary-dark);
  letter-spacing: -0.01em;
}

.nav-logo-text .college-sub {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--clr-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---- Nav Menu ---- */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex: 1;
  justify-content: center;
}

.nav-item {
  position: relative;
}

/* Keep dropdown open while cursor moves from trigger to menu */
@media (min-width: 901px) {
  .nav-item.has-dropdown::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    height: 12px;
  }
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-text);
  transition: all var(--transition-fast);
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.nav-link:hover,
.nav-link.active {
  color: var(--clr-primary);
  background: rgba(26,58,110,0.06);
}

/* ---- Dropdown Arrow ---- */
.nav-link .nav-arrow {
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: 2px;
}

.nav-item:hover .nav-arrow,
.nav-item.open .nav-arrow {
  transform: rotate(180deg);
}

/* ---- Dropdown Menu ---- */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--clr-border);
  padding: var(--sp-2);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility 0s var(--transition-base);
  transform: translateX(-50%) translateY(-8px);
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* On mobile, visibility is handled by JS toggle */
.nav-item.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Arrow pip */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: var(--clr-white);
  border-left: 1px solid var(--clr-border);
  border-top: 1px solid var(--clr-border);
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-text);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.dropdown-link:hover {
  background: rgba(26,58,110,0.06);
  color: var(--clr-primary);
}
.dropdown-link .dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(26,58,110,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: background var(--transition-fast);
}
.dropdown-link:hover .dropdown-icon {
  background: var(--clr-primary);
  color: var(--clr-white);
}

/* Divider inside dropdown */
.dropdown-divider {
  height: 1px;
  background: var(--clr-border);
  margin: var(--sp-2);
}

/* ---- Nav CTA ---- */
.nav-cta {
  flex-shrink: 0;
}

/* ---- Hamburger (mobile) ---- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--sp-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  background: transparent;
  transition: background var(--transition-fast);
}
.nav-toggle:hover { background: var(--clr-bg); }

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--clr-primary-dark);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  transform-origin: center;
}

/* Hamburger → X animation */
.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Mobile Styles ---- */
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-cta    { display: none; }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 100vw;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    background: var(--clr-white);
    padding: var(--sp-6);
    gap: var(--sp-2);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    box-shadow: var(--shadow-xl);
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-link {
    padding: var(--sp-3) var(--sp-4);
    font-size: var(--fs-base);
    border-radius: var(--radius-md);
    justify-content: space-between;
  }

  /* Dropdown on mobile */
  .nav-item:hover .dropdown-menu {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: none;
  }

  .dropdown-menu {
    position: static;
    width: 100%;
    max-width: 100%;
    left: auto;
    top: auto;
    min-width: 0;
    transform: none;
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    overflow: hidden;
    box-shadow: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: var(--clr-off-white);
    padding: 0;
    margin-top: 0;
    transition: max-height var(--transition-slow), opacity var(--transition-fast), margin-top var(--transition-fast), visibility 0s var(--transition-slow);
  }
  .dropdown-menu::before { display: none; }

  .nav-item.open .dropdown-menu {
    max-height: 260px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    padding: var(--sp-1);
    transition: max-height var(--transition-slow), opacity var(--transition-fast), margin-top var(--transition-fast), visibility 0s;
    margin-top: var(--sp-1);
    border: 1px solid var(--clr-border);
    transform: none;
  }

  .dropdown-link {
    min-width: 0;
    padding: var(--sp-2) var(--sp-3);
    border-radius: var(--radius-sm);
    font-size: var(--fs-sm);
    line-height: 1.35;
    white-space: normal;
    word-break: break-word;
  }

  .dropdown-link .dropdown-icon {
    width: 28px;
    height: 28px;
    font-size: 0.9rem;
  }

  .dropdown-divider {
    margin: var(--sp-1) var(--sp-2);
  }

  .mobile-cta {
    margin-top: auto;
    padding-top: var(--sp-6);
    border-top: 1px solid var(--clr-border);
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
  }
  .mobile-cta .btn { justify-content: center; }
}