/* Navigation layout and interactions */
.navbar {
  padding: 1rem 0;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

body[data-theme="dark"] .navbar {
  background: rgba(7, 17, 31, 0.82);
}

.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text);
  font-weight: 700;
}

.navbar-brand small {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(15, 91, 255, 0.16);
  background: var(--surface);
  padding: 0.25rem;
}

.navbar-nav .nav-link {
  position: relative;
  color: var(--text);
  font-weight: 500;
  margin: 0 0.35rem;
  padding: 0.6rem 0.95rem;
  transition: color 0.2s ease;
}

.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0.95rem;
  right: 0.95rem;
  bottom: 0.25rem;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}

.navbar-nav .nav-link.active {
  color: var(--primary);
}

.theme-toggle {
  border: 1px solid var(--border);
  margin-left: 0.5rem;
  color: var(--text);
  background: var(--surface);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
}

.theme-toggle:hover {
  transform: translateY(-1px);
}

.navbar-toggler {
  border: none;
}

.navbar-toggler:focus {
  box-shadow: none;
}