/* ========================================================================== */
/* Navigation */
/* ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: var(--z-nav);
  transition: var(--transition-medium);
  padding: 0.75rem 0;
}

[data-theme="dark"] .navbar {
  background: rgba(17, 24, 39, 0.95);
}

.navbar.scrolled {
  box-shadow: 0 4px 20px var(--shadow-light);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo a {
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
}

.logo-text {
  color: var(--primary-color);
}

.logo-dot {
  color: var(--secondary-color);
  margin-left: 2px;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--primary-color);
  background: var(--bg-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  gap: 3px;
}

.hamburger {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}