/* Navigation CSS - Modern styles with responsive behavior */
/* Praxis für Osteopathie Martina Möller */

/* ============================================
   DESKTOP NAVIGATION
   ============================================ */

.main-navigation {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.main-navigation:hover {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-sm) var(--container-padding);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
}

/* ============================================
   LOGO STYLING
   ============================================ */

.logo {
  display: flex;
  align-items: center;
  z-index: var(--z-dropdown);
  flex: 0 0 auto;
}

.logo a {
  display: flex;
  align-items: center;
}

.logo img {
  height: 60px;
  width: auto;
  transition: transform var(--transition-base);
}

.logo img:hover {
  transform: scale(1.05);
}

/* ============================================
   SITE TITLE (mobile only, next to logo)
   ============================================ */

.site-title {
  display: none;
}

/* ============================================
   NAVIGATION LINKS - DESKTOP
   ============================================ */

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
}

.nav-links li {
  margin: 0;
}

.nav-links a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  text-decoration: none;
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-base);
  position: relative;
  white-space: nowrap;
}

/* Hover effect with background */
.nav-links a:hover {
  color: var(--color-secondary);
  background-color: var(--color-background);
  transform: translateY(-2px);
}

/* Active page styling */
.nav-links a.active {
  color: var(--color-white);
  background-color: var(--color-secondary);
  font-weight: var(--font-weight-bold);
  box-shadow: var(--shadow-sm);
}

.nav-links a.active:hover {
  background-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Focus styles for accessibility */
.nav-links a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   MOBILE MENU TOGGLE (HAMBURGER)
   ============================================ */

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: var(--z-dropdown);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-base);
}

.mobile-menu-toggle:hover {
  background-color: var(--color-background);
}

.mobile-menu-toggle:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Hamburger icon lines */
.mobile-menu-toggle span {
  display: block;
  width: 28px;
  height: 3px;
  background-color: var(--color-secondary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Animated hamburger to X transformation */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ============================================
   MOBILE RESPONSIVE STYLES
   ============================================ */

@media (max-width: 767px) {
  /* Show mobile menu toggle */
  .mobile-menu-toggle {
    display: flex;
  }
  
  /* Hide navigation links by default on mobile */
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    gap: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--transition-base),
                opacity var(--transition-base),
                padding var(--transition-base);
  }
  
  /* Show navigation when active */
  .nav-links.active {
    max-height: 500px;
    opacity: 1;
    padding: var(--spacing-md);
  }
  
  /* Mobile link styling */
  .nav-links li {
    margin-bottom: var(--spacing-xs);
  }
  
  .nav-links a {
    display: flex;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1.1rem;
    min-height: 44px;
    align-items: center;
    white-space: normal;
  }
  
  .nav-links a:hover {
    transform: translateX(4px);
  }
  
  /* Adjust logo size for mobile */
  .logo img {
    height: 50px;
  }

  /* Show site title on mobile */
  .site-title {
    display: block;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.85rem;
    line-height: 1.3;
    color: var(--color-secondary);
    font-weight: var(--font-weight-medium);
    text-align: center;
    white-space: nowrap;
  }
  
  /* Adjust navigation container padding */
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-sm);
    justify-content: space-between;
    position: relative;
  }
  
  /* Hide centering spacer on mobile */
  .nav-container::after {
    display: none;
  }
  
  .logo {
    width: auto;
  }
}

/* ============================================
   TABLET RESPONSIVE STYLES
   ============================================ */

@media (min-width: 768px) and (max-width: 1023px) {
  .nav-links {
    gap: var(--spacing-xs);
  }
  
  .nav-links a {
    padding: var(--spacing-xs) var(--spacing-xs);
    font-size: 0.9rem;
  }
  
  .logo img {
    height: 50px;
  }
}