/* nav.css */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0;
  transition: background var(--transition-base), border-color var(--transition-base), padding var(--transition-base);
}

.site-nav.scrolled {
  background: rgba(8, 11, 15, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-bg-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--spacing-container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-container-padding);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text-heading);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.nav-logo-mark {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-body);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--color-text-heading);
  background: rgba(255,255,255,0.05);
}

.nav-links a.active {
  color: var(--color-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Mobile nav */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: transparent;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-body);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  top: 72px;
  background: var(--color-bg);
  z-index: 999;
  padding: 32px var(--spacing-container-padding);
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--color-bg-border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--color-text-body);
  font-size: 1.1rem;
  font-weight: 500;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-bg-border);
  text-decoration: none;
}
.mobile-menu a:hover { color: var(--color-primary); }
.mobile-menu .btn { margin-top: 16px; width: 100%; justify-content: center; }

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-outline { display: none; }
  .nav-hamburger { display: flex; }
}