/* ============================================
   navbar.css — Sticky Navigation Bar
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--navbar-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

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

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition: opacity var(--transition);
}

.nav-logo:hover { opacity: 0.8; }

.nav-logo strong {
  font-weight: 800;
  color: var(--accent);
}

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  background: var(--bg-3);
}

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

/* Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Theme toggle */
.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  background: var(--bg-3);
  color: var(--text);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(20deg);
}

/* Mobile toggle button */
.nav-mobile-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  background: var(--bg-3);
  color: var(--text);
  font-size: 1.1rem;
  align-items: center;
  justify-content: center;
}

/* ===== Mobile Menu ===== */
.mobile-menu {
  display: none;
  flex-direction: column;
  position: fixed;
  top: 64px;
  left: 0; right: 0;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  z-index: 999;
  padding: 1rem 1.5rem 1.5rem;
  gap: 0.25rem;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.mobile-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-muted);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }
  .mobile-menu { display: flex; }
}

/* Page padding for fixed navbar */
body {
  padding-top: 64px;
}