/* ==========================================================================
   navigation.css - Perls Holzschmiede
   Theme-Bar, Site Header, Hauptnavigation, Mobile Menue
   ========================================================================== */

/*
   Erwartete HTML-Struktur:
   ========================

   <div class="theme-bar" role="toolbar" aria-label="Design wechseln">
     <div class="theme-bar-inner">
       <span class="theme-bar-label" id="theme-label">Design:</span>
       <div class="theme-buttons" role="radiogroup" aria-labelledby="theme-label">
         <button class="theme-btn active" data-theme="natur"
                 role="radio" aria-checked="true" aria-label="Natur-Design">
           <span class="sr-only">Natur</span>
         </button>
         <button class="theme-btn" data-theme="modern"
                 role="radio" aria-checked="false" aria-label="Modern-Design">
           <span class="sr-only">Modern</span>
         </button>
         <button class="theme-btn" data-theme="hell"
                 role="radio" aria-checked="false" aria-label="Helles Design">
           <span class="sr-only">Hell</span>
         </button>
         <button class="theme-btn" data-theme="rustikal"
                 role="radio" aria-checked="false" aria-label="Rustikales Design">
           <span class="sr-only">Rustikal</span>
         </button>
       </div>
     </div>
   </div>

   <header class="site-header" role="banner">
     <div class="header-inner">
       <div class="site-logo">
         <a href="index.html" aria-label="Perls Holzschmiede - Startseite">
           Perls Holzschmiede
         </a>
       </div>

       <button class="menu-toggle" aria-expanded="false" aria-controls="main-nav"
               aria-label="Menue oeffnen">
         <span class="menu-toggle-bar"></span>
         <span class="menu-toggle-bar"></span>
         <span class="menu-toggle-bar"></span>
       </button>

       <nav class="main-nav" id="main-nav" role="navigation" aria-label="Hauptnavigation">
         <ul class="nav-list">
           <li><a href="index.html" class="nav-link" data-page="index">Startseite</a></li>
           <li><a href="shop.html" class="nav-link" data-page="shop">Shop</a></li>
           <li><a href="galerie.html" class="nav-link" data-page="galerie">Galerie</a></li>
           <li><a href="kontakt.html" class="nav-link" data-page="kontakt">Kontakt</a></li>
         </ul>
         <a href="shop.html#warenkorb" class="nav-cart" aria-label="Warenkorb">
           <svg class="nav-cart-icon" width="22" height="22" viewBox="0 0 24 24"
                fill="none" stroke="currentColor" stroke-width="2"
                stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
             <circle cx="9" cy="21" r="1"/>
             <circle cx="20" cy="21" r="1"/>
             <path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6"/>
           </svg>
           <span class="cart-badge" aria-live="polite" aria-label="Artikel im Warenkorb">0</span>
         </a>
       </nav>
     </div>
   </header>
*/


/* --------------------------------------------------------------------------
   1. Theme-Bar (Design-Umschalter am oberen Rand)
   -------------------------------------------------------------------------- */

.theme-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--theme-bar-height, 2.5rem);
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-fixed, 300);
  display: flex;
  align-items: center;
}

.theme-bar-inner {
  width: 100%;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
}

.theme-bar-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  user-select: none;
}

.theme-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Einzelner Theme-Button (Farbkreis) */
.theme-btn {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  position: relative;
  flex-shrink: 0;
}

.theme-btn:hover {
  transform: scale(1.15);
}

.theme-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Tooltip per CSS */
.theme-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-text);
  color: var(--color-surface);
  font-size: var(--text-xs);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.theme-btn:hover::after {
  opacity: 1;
}

/* Theme-Farben fuer die Buttons */
.theme-btn[data-theme="natur"] {
  background-color: #8B6914;
}
.theme-btn[data-theme="natur"]::after {
  content: "Natur";
}

.theme-btn[data-theme="modern"] {
  background-color: #5B7FA5;
}
.theme-btn[data-theme="modern"]::after {
  content: "Modern";
}

.theme-btn[data-theme="hell"] {
  background-color: #6B8F6B;
}
.theme-btn[data-theme="hell"]::after {
  content: "Hell";
}

.theme-btn[data-theme="rustikal"] {
  background-color: #C46A2B;
}
.theme-btn[data-theme="rustikal"]::after {
  content: "Rustikal";
}

/* Aktiver Theme-Button */
.theme-btn.active {
  border-color: var(--color-text);
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-text);
}


/* --------------------------------------------------------------------------
   2. Site Header (Logo + Navigation)
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: var(--theme-bar-height, 2.5rem);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-sticky, 200);
  transition: box-shadow var(--transition-normal);
}

/* Verstaerkter Schatten beim Scrollen */
.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  width: 100%;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: var(--header-height, 4rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
}


/* --------------------------------------------------------------------------
   3. Site Logo
   -------------------------------------------------------------------------- */

.site-logo {
  flex-shrink: 0;
}

.site-logo a {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.site-logo a:hover {
  color: var(--color-primary-dark);
  text-decoration: none;
}


/* --------------------------------------------------------------------------
   4. Hauptnavigation (Desktop)
   -------------------------------------------------------------------------- */

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text);
  font-size: var(--text-base);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast),
              border-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}


/* --------------------------------------------------------------------------
   5. Warenkorb-Icon mit Badge
   -------------------------------------------------------------------------- */

.nav-cart {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
  margin-left: var(--space-sm);
}

.nav-cart:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-hover);
  text-decoration: none;
}

.nav-cart:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.nav-cart-icon {
  display: block;
}

.cart-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: var(--text-xs);
  font-weight: 700;
  line-height: 18px;
  text-align: center;
  border-radius: var(--radius-full);
  pointer-events: none;
  transition: transform var(--transition-fast),
              opacity var(--transition-fast);
}

/* Badge ausblenden wenn 0 Artikel */
.cart-badge.hidden {
  opacity: 0;
  transform: scale(0);
}


/* --------------------------------------------------------------------------
   6. Hamburger-Menue-Button (Mobile)
   -------------------------------------------------------------------------- */

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-xs);
  border-radius: var(--radius-md);
  z-index: calc(var(--z-modal, 400) + 1);
  transition: background-color var(--transition-fast);
}

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

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

.menu-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-normal),
              opacity var(--transition-normal);
}

.menu-toggle-bar + .menu-toggle-bar {
  margin-top: 5px;
}

/* Hamburger -> X Animation */
.menu-toggle.active .menu-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.active .menu-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* --------------------------------------------------------------------------
   7. Overlay-Hintergrund fuer mobiles Menue
   -------------------------------------------------------------------------- */

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-modal, 400) - 1);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.nav-overlay.visible {
  display: block;
  opacity: 1;
}


/* --------------------------------------------------------------------------
   8. Body-Offset
   Theme-Bar und Header schieben den Seiteninhalt nach unten
   -------------------------------------------------------------------------- */

body {
  padding-top: calc(var(--theme-bar-height, 2.5rem) + var(--header-height, 4rem));
}


/* --------------------------------------------------------------------------
   9. Responsive / Mobile (< 768px)
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {

  /* Hamburger einblenden */
  .menu-toggle {
    display: flex;
  }

  /* Navigation als Vollbild-Overlay */
  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    background-color: var(--color-surface);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: calc(var(--theme-bar-height, 2.5rem) + var(--header-height, 4rem) + var(--space-lg)) var(--space-lg) var(--space-lg);
    gap: var(--space-md);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal, 400);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    visibility: hidden;
  }

  .main-nav.open {
    transform: translateX(0);
    visibility: visible;
  }

  /* Linkliste vertikal */
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    padding: var(--space-md);
    font-size: var(--text-lg);
    border-bottom: 1px solid var(--color-border);
    border-left: 3px solid transparent;
  }

  .nav-link.active {
    border-bottom-color: var(--color-border);
    border-left-color: var(--color-primary);
    background-color: var(--color-surface-hover);
  }

  /* Warenkorb im mobilen Menue */
  .nav-cart {
    margin-left: 0;
    margin-top: var(--space-md);
    align-self: flex-start;
    width: auto;
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-sm);
  }

  /* Logo kleiner auf Mobilgeraeten */
  .site-logo a {
    font-size: var(--text-lg);
  }
}


/* --------------------------------------------------------------------------
   10. Responsive / Tablet (768px - 1023px)
   -------------------------------------------------------------------------- */

@media (min-width: 768px) and (max-width: 1023px) {

  .nav-link {
    padding: var(--space-sm) var(--space-sm);
    font-size: var(--text-sm);
  }
}


/* --------------------------------------------------------------------------
   11. Print-Stile
   -------------------------------------------------------------------------- */

@media print {
  .theme-bar,
  .menu-toggle,
  .nav-cart,
  .nav-overlay {
    display: none !important;
  }

  .site-header {
    position: static;
    box-shadow: none;
    border-bottom: 1px solid #000;
  }

  .main-nav {
    position: static !important;
    transform: none !important;
    visibility: visible !important;
  }

  body {
    padding-top: 0;
  }
}