/*
 * Münzenbacher - Modern Coin Shop Stylesheet
 * Version: 1.0
 * Design System: Gold-Brown color scheme with Inter & Playfair Display
 */

/* ================================
   CSS CUSTOM PROPERTIES (Variables)
   ================================ */
:root {
  /* Color Palette - Gold & Brown Theme */
  --color-primary: #9b7a46;
  --color-primary-light: #bfa36b;
  --color-primary-dark: #6f5938;
  --color-secondary: #5a4a2a;
  --color-accent: #d4af37;
  
  --color-bg-main: #ffffff;
  --color-bg-light: #fbf8f3;
  --color-bg-card: #f9f4ed;
  --color-bg-footer: #2c2c2c;
  
  --color-text-primary: #222222;
  --color-text-secondary: #6b6b6b;
  --color-text-light: #999999;
  --color-text-white: #ffffff;
  
  --color-border: #e6e6e6;
  --color-border-light: rgba(191, 163, 107, 0.2);
  
  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Playfair Display', serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-round: 50%;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(155, 122, 70, 0.12);
  --shadow-md: 0 4px 16px rgba(155, 122, 70, 0.15);
  --shadow-lg: 0 8px 32px rgba(155, 122, 70, 0.18);
  --shadow-xl: 0 12px 48px rgba(155, 122, 70, 0.22);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max-width: 1200px;
  --content-max-width: 900px;
  --header-height: 80px;
}

/* ================================
   RESET & BASE STYLES
   ================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ================================
   TYPOGRAPHY
   ================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

strong, b {
  font-weight: 600;
}

/* ================================
   LAYOUT UTILITIES
   ================================ */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.content {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section--light {
  background-color: var(--color-bg-light);
}

/* ================================
   HEADER
   ================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.98) 0%, 
    rgba(250, 248, 245, 0.98) 50%, 
    rgba(243, 231, 215, 0.98) 100%
  );
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
}

.header__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  background: linear-gradient(135deg, 
    var(--color-primary) 0%, 
    var(--color-primary-light) 50%, 
    var(--color-primary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  padding: 0 var(--spacing-xs);
}

.header__logo::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: var(--spacing-xs);
  right: var(--spacing-xs);
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(191, 163, 107, 0.5) 50%, 
    transparent 100%
  );
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav__link {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-primary-dark);
  transition: all var(--transition-fast);
  position: relative;
}

.nav__link:hover {
  background: rgba(191, 163, 107, 0.15);
  transform: translateY(-2px);
  color: var(--color-secondary);
}

.nav__link--active {
  background: linear-gradient(135deg, 
    rgba(155, 122, 70, 0.12) 0%, 
    rgba(191, 163, 107, 0.12) 100%
  );
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.nav__link--cart {
  padding: var(--spacing-xs) 0.75rem;
  margin-left: var(--spacing-xs);
  background: linear-gradient(135deg, 
    var(--color-primary) 0%, 
    var(--color-primary-light) 100%
  );
  color: var(--color-text-white);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(155, 122, 70, 0.25);
}

.nav__link--cart:hover {
  background: linear-gradient(135deg, 
    var(--color-primary-light) 0%, 
    var(--color-primary) 100%
  );
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(155, 122, 70, 0.35);
}

.nav__link--cart svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.9) 0%, 
    rgba(248, 247, 243, 0.9) 100%
  );
  color: var(--color-primary);
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-left: var(--spacing-xs);
}

.menu-toggle:hover {
  background: linear-gradient(135deg, 
    rgba(155, 122, 70, 0.1) 0%, 
    rgba(191, 163, 107, 0.1) 100%
  );
  border-color: rgba(155, 122, 70, 0.3);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.hamburger {
  position: relative;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  left: 0;
}

.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

/* Side Menu */
.side-menu {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  width: 280px;
  background: linear-gradient(180deg, 
    rgba(255, 255, 255, 0.98), 
    rgba(250, 248, 245, 0.95)
  );
  box-shadow: -4px 0 20px rgba(155, 122, 70, 0.15);
  overflow-y: auto;
  z-index: 1300;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  backdrop-filter: blur(8px);
  border-left: 2px solid var(--color-border-light);
}

.side-menu--open {
  transform: translateX(0);
}

.side-menu__list {
  list-style: none;
  padding: var(--spacing-md) 0;
}

.side-menu__item {
  margin: 4px var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.side-menu__item:hover {
  background: linear-gradient(90deg, 
    rgba(191, 163, 107, 0.1), 
    rgba(155, 122, 70, 0.08)
  );
  transform: translateX(4px);
}

.side-menu__link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-primary-dark);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.side-menu__link:hover {
  color: var(--color-primary);
  background: rgba(255, 253, 248, 0.8);
  text-shadow: 0 1px 2px rgba(155, 122, 70, 0.1);
}

/* ================================
   BREADCRUMBS
   ================================ */
.breadcrumbs {
  padding: var(--spacing-md) 0;
  font-size: 0.875rem;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  list-style: none;
}

.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.breadcrumbs__item:not(:last-child)::after {
  content: '›';
  color: var(--color-text-secondary);
}

.breadcrumbs__link {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumbs__link:hover {
  color: var(--color-primary);
}

.breadcrumbs__current {
  color: var(--color-primary-dark);
  font-weight: 500;
}

/* ================================
   PRODUCT PAGE
   ================================ */
.product {
  padding: var(--spacing-2xl) 0;
}

.product__container {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.product__image-wrapper {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-md));
  height: fit-content;
}

.product__image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, #f8f7f3 60%, #e6e6e6 100%);
  box-shadow: var(--shadow-lg);
  border: 2px solid #e8dcc0;
  padding: var(--spacing-lg);
}

.product__info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.product__title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

.product__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  font-weight: 400;
  margin-bottom: var(--spacing-lg);
}

.product__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.product__meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.product__meta-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product__meta-value {
  font-weight: 600;
  color: var(--color-primary-dark);
}

.product__description {
  line-height: 1.8;
  color: var(--color-text-primary);
}

.product__features {
  list-style: none;
  display: grid;
  gap: var(--spacing-sm);
}

.product__feature {
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
}

.product__feature::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: bold;
  flex-shrink: 0;
}

.product__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(90deg, 
    var(--color-primary) 0%, 
    var(--color-primary-light) 100%
  );
  color: var(--color-text-white);
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: 32px;
  box-shadow: 0 4px 20px rgba(155, 122, 70, 0.35);
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
}

.product__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(155, 122, 70, 0.45);
}

/* Related Products */
.related-products {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg-light);
}

.related-products__title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: 2rem;
}

.related-products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.product-card {
  background: var(--color-bg-main);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card__image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, #f8f7f3 60%, #e6e6e6 100%);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-md);
}

.product-card__title,
.card-body h3,
.category-card .category-title,
.coin-card .card-body h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  display: block;
}

.product-card__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.product-card__link {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9375rem;
}

/* ================================
   FOOTER
   ================================ */
.footer {
  background: var(--color-bg-footer);
  color: var(--color-text-white);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-2xl);
}

.footer__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer__links {
  display: flex;
  gap: var(--spacing-xl);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
  list-style: none;
}

.footer__link {
  color: var(--color-text-white);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-primary-light);
}

.footer__copyright {
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.875rem;
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */
@media (max-width: 768px) {
  /* Header */
  .header__nav {
    display: none;
  }
  
  .header__nav--mobile {
    display: flex;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .header__logo {
    font-size: 1.375rem;
  }
  
  /* Product Page */
  .product__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .product__image-wrapper {
    position: relative;
    top: 0;
  }
  
  .product__title {
    font-size: 2rem;
  }
  
  /* Typography */
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  
  /* Spacing */
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  /* Related Products */
  .related-products__grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .product__title {
    font-size: 1.75rem;
  }
  
  .related-products__grid {
    grid-template-columns: 1fr;
  }
}

/* ================================
   UTILITY CLASSES
   ================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Loading Animation for Lazy Images */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.img-loading {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite linear;
}