/* ===================================
   CSS Variables for Easy Theming
   =================================== */
:root {
  /* Colors - easily changeable */
  --primary-color: #161c14;
  --primary-hover: #161c14;
  --secondary-color: #161c14;
  --text-color: #161c14;
  --text-light: #161c14;
  --background: hsl(27,100%,98%);
  --background-darker: hsl(190, 21%, 84%);
  --background-light: #ffffff;
  --header-background: hsla(197, 71%, 39%, 0.73);
  --border-color: hsl(0,0%,80%);
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-hover: rgba(0, 0, 0, 0.2);

  /* Spacing */
  --spacing-xxs: 2px;
  --spacing-xs: 6px;
  --spacing-sm: 12px;
  --spacing-md: 18px;
  --spacing-lg: 28px;
  --spacing-xl: 36px;
  --spacing-xxl: 48px;

  /* Typography */
  --font-family: "Montserrat", -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-xxl: 24px;
  --font-weight-normal: 350;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Layout */
  --max-width: 1200px;
  --border-radius: 0px;
  --sidebar-width: 200px;
  --card-image-size: 270px;
}

/* ===================================
   Reset & Base Styles
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

/* weigh can be from 100 to 900 for montserrat font */
body {
  font-family: var(--font-family);
  font-family: "Montserrat", sans-serif;
  font-optical-sizing: auto;
  font-weight: 350;
  font-style: normal;
  color: var(--text-color);
  background-color: var(--background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

p {
  max-width: 800px;
  margin: 0 auto;
}

p a {
  text-decoration: underline;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ===================================
   Accessibility
   =================================== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-color);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 200;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

/* ===================================
   Header Styles
   =================================== */
.site-header {
  background: var(--header-background);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 99;
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  display: flex;
  justify-content: space-between;
}

/* Logo Icon - Left side */
.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
  height: 50px;
  margin: 5px;
  font-size: var(--font-size-sm);
}

.logo-icon {
  display: block;
}

/* Desktop Category Navigation - Middle */
.category-nav-desktop {
  display: none;
}

.category-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: clamp(var(--spacing-xxs), 1.5vw, var(--spacing-sm));
  align-items: center;
}

/* Shared navigation link styles */
.category-nav-link,
.nav-link {
  display: block;
  color: var(--text-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.category-nav-link:hover,
.nav-link:hover {
  font-weight: 800;
}

/* Desktop header navigation - compact */
.category-nav-link {
  padding: var(--spacing-xs) clamp(var(--spacing-xxs), 1vw, var(--spacing-sm));
  font-weight: var(--font-weight-medium);
  font-size: 15px;
  white-space: nowrap;
  color: var(--background-light);
}

/* Mobile menu navigation - larger touch targets */
.nav-link {
  padding: var(--spacing-sm);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
}

/* Mobile Menu Toggle - Right side */
.menu-checkbox {
  display: none;
}

.menu-toggle {
  display: flex; /* Show on mobile */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 50px;
  cursor: pointer;
}

.menu-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--background);
  transition: all 0.3s ease;
  border-radius: 2px;
  position: relative;
}

/* Transform to X when checkbox is checked */
.menu-checkbox:checked ~ .menu-toggle .menu-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-checkbox:checked ~ .menu-toggle .menu-bar:nth-child(2) {
  opacity: 0;
}

.menu-checkbox:checked ~ .menu-toggle .menu-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Show menu when checkbox is checked */
.menu-checkbox:checked ~ .category-nav-mobile {
  display: block;
}

/* Category Navigation - Mobile Only */
.category-nav-mobile {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--background);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 6px var(--shadow);
  text-align: center;
}

.category-nav-mobile.active {
  display: block;
}

.category-menu {
  list-style: none;
  padding: var(--spacing-sm);
  backdrop-filter: blur(5px);
}

.category-menu li {
  margin-bottom: var(--spacing-xs);
}

/* ===================================
   Desktop Sidebar Navigation
   =================================== */
.sidebar-nav {
  display: none;
}

.page-wrapper {
  display: block;
}

/* Category Card (for subcategories) */
.category-card {
  display: block;
  background: var(--background);
  border-radius: var(--border-radius);
  overflow: hidden;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 2px 8px var(--shadow);
}

.category-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px var(--shadow-hover);
  border-color: var(--primary-color);
}

/* ===================================
   Main Content
   =================================== */
.main-content {
  min-height: 60vh;
  padding: var(--spacing-md) var(--spacing-sm);
}

/* Loader */
.loader {
  text-align: center;
  padding: var(--spacing-xxl);
}

.spinner {
  width: 50px;
  height: 50px;
  margin: 0 auto var(--spacing-md);
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error-message {
    text-align: center;
}

/* ===================================
   Home Page - Large Category Tiles
   =================================== */
.hero-img {
  width: 150px;
  margin: 0 auto var(--spacing-md);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-light);
  overflow: hidden;
  line-height: 1.2;
}

.home-hero {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.home-hero h1 {
  font-size: var(--font-size-xxl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.home-hero h2 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.home-hero p {
  font-size: var(--font-size-base);
  color: var(--text-light);
}

.category-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  max-width: var(--max-width);
  justify-content: center;
  margin: auto;
}

/* ===================================
   Shared Card Styles
   =================================== */
.card {
  background: var(--background-light);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 2px 8px var(--shadow);
  max-width: var(--card-image-size);
  display: flex;
  flex-direction: column;
  position: relative;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px var(--shadow-hover);
  border-color: var(--border-color);
}

.card-image {
  width: var(--card-image-size);
  height: var(--card-image-size);
  object-fit: contain;
  object-position: center;
  background: var(--background-light);
  flex-shrink: 0;
  display: block;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-light);
  line-height: 1.2;
}

.image-grid .card-image,
.category-tiles .card-image {
  width: 100%;
}

.card-image-grid {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  flex-shrink: 0;
  margin: var(--spacing-sm) 0;
  border: 1px solid var(--border-color);
}

.card-image-grid img {
  width: 50%;
  aspect-ratio: 1;
  object-fit: contain;
  background: var(--background-light);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  box-sizing: border-box;
}

.card-image-grid img:nth-child(2n) {
  border-right: none;
}

.card-image-grid img:nth-child(n+3) {
  border-bottom: none;
}

.card-image-single {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  margin: var(--spacing-sm) 0;
}

.card-image-single img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  background: var(--background-light);
  box-sizing: border-box;
  border: 1px solid var(--border-color);
}

.card-content {
  padding: var(--spacing-sm);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.card-suggested {
  font-size: var(--font-size-lg);
}

.card-description {
  font-size: var(--font-size-base);
  color: var(--text-light);
  line-height: 1.6;
}

/* Card links */
.card a,
a.card {
  text-decoration: none;
}

.category-tile,
.image-card {
  cursor: pointer;
}

/* ===================================
   Category Page - Image Gallery
   Also Image Detail Inherits some of these rules
   =================================== */
.category-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.category-title {
  font-size: var(--font-size-xxl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm);
}

.category-description {
  font-size: var(--font-size-lg);
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

.image-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  justify-content: center;
}

/* Image Card uses shared card styles */
.image-card {
  cursor: pointer;
}

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  text-align: center;
  border-radius: var(--border-radius);
  transition: var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--header-background);
  color: var(--text-color);
  border: 1px solid var(--header-background);
}

.btn-primary:hover {
  color: var(--background-light);
  font-weight: var(--font-weight-bold);
  border: 1px solid var(--text-color);
}

.btn-secondary {
  background: var(--background);
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
}

/* ===================================
   Image Detail Page
   =================================== */
.image-detail-container {
  margin: 0 auto var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: calc(var(--card-image-size) * 2);
  width: fit-content;
}

.card.image-detail-container a img.card-image {
  width: calc(var(--card-image-size) * 2);
  height: calc(var(--card-image-size) * 2);
  max-width: calc(var(--card-image-size) * 2);
  max-height: calc(var(--card-image-size) * 2);
}

.image-detail-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: 0 var(--spacing-lg) var(--spacing-lg);
}

/* Related Images Section */
.related-images {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.related-images h2 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.related-images .image-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  justify-content: center;
}

.related-images .card a {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.related-images .card-content {
  padding: var(--spacing-md);
}

/* ===================================
   Static Pages
   =================================== */
.static-page {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-sm);
}

.static-page h1 {
  font-size: var(--font-size-xxl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.static-page h2 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.static-page h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.static-page p {
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.static-page ul {
  margin-left: 0;
  margin-bottom: var(--spacing-md);
  list-style: none;
  padding-left: 0;
}

.static-page ol {
  margin-left: 0;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-sm);
}

.static-page li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.3;
}

.static-page a {
  text-decoration: underline;
}

.static-page a:hover{
  font-weight: var(--font-weight-bold);
}

/* ===================================
   Ad Placeholders
   =================================== */
.ad-banner {
  background: var(--background-light);
  border: 1px dashed var(--border-color);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--spacing-md) 0;
}

/* ===================================
   Footer
   =================================== */
.site-footer {
  background: var(--background-light);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) var(--spacing-sm);
  margin-top: var(--spacing-xxl);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--text-color);
}

.footer-copyright {
  font-size: 14px;
  color: var(--text-light);
}

@media (min-width: 768px) {
  /* Hide mobile menu on tablet/desktop */
  .menu-toggle {
    display: none;
  }

  .category-nav-desktop {
    display: none;
  }

  .category-nav-mobile {
    display: none !important;
  }

  /* Subtitle larger on tablet/desktop */
  .site-subtitle {
    font-size: 1rem;
  }

  .image-detail-actions {
    flex-wrap: wrap;
    justify-content: center;
  }

  /* Hide desktop header */
  .site-header {
    display: none;
  }

  /* Desktop Sidebar Layout */
  .sidebar-nav {
    display: block;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--background-darker);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 98;
  }

  .page-wrapper {
    margin-left: var(--sidebar-width);
  }

  .sidebar-header {
    padding: var(--spacing-xxs);
    display: flex;
    align-items: center;
    min-height: 60px;
  }

  .sidebar-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
  }

  .sidebar-content {
    overflow-x: hidden;
    min-width: 0;
  }

  .sidebar-categories {
    list-style: none;
    padding: 0;
    margin: 0;
    min-width: 0;
  }

  .sidebar-category-item {
    margin: 0;
    min-width: 0;
  }

  .sidebar-category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-width: 0;
  }

  .expand-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-left: var(--spacing-xs);
    flex-shrink: 0;
    color: var(--text-color);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-lg);
    line-height: 1;
    cursor: pointer;
    user-select: none;
  }

  .expand-icon:hover {
    opacity: 0.7;
  }

  .no-expand {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
  }

  .sidebar-category-link {
    flex: 1;
    min-width: 0;
    color: var(--text-color);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    padding: var(--spacing-xxs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .sidebar-categories > .sidebar-category-item > .sidebar-category-header > .sidebar-category-link {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
  }

  .sidebar-categories > .sidebar-category-item > .sidebar-category-header > .sidebar-category-link:hover {
    font-weight: var(--font-weight-bold);
  }

  .sidebar-categories > .sidebar-category-item > .sidebar-category-header > .sidebar-category-link.active {
    font-weight: var(--font-weight-bold);
  }

  .sidebar-subcategories .sidebar-category-link:hover {
    font-weight: var(--font-weight-bold);
  }

  .sidebar-subcategories .sidebar-category-link.active {
    font-weight: var(--font-weight-bold);
  }

  .sidebar-subcategories {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    min-width: 0;
  }

/* watch out here if the subcategories exceeds 1000px this could cause some subcategories to be hidden and not seen. If you see subcategories become hidden you can increase this value to double or triple. */
  .sidebar-category-item.expanded > .sidebar-subcategories {
    max-height: 1000px;
  }
}

/* ===================================
   Lazy Loading
   =================================== */
.lazy-image {
  opacity: 0;
  transition: opacity 0.3s ease-in;
}

.lazy-image.loaded {
  opacity: 1;
}

/* Loading placeholder */
.image-placeholder {
  background: linear-gradient(90deg, var(--background-light) 25%, #e0e0e0 50%, var(--background-light) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===================================
   Mobile Full Width Cards (< 500px)
   =================================== */
@media (max-width: 499px) {
  .main-content {
    padding: 0;
  }

  .category-grid,
  .image-gallery {
    gap: var(--spacing-md);
    margin: 0;
  }

  .card {
    max-width: 100%;
    border-radius: 0;
    margin: 0;
  }

  .image-detail-container {
    align-items: center;
    margin: 0 auto var(--spacing-lg);
    max-width: 100%;
    width: 100%;
  }

  .card.image-detail-container a img.card-image {
    width: 100%;
    height: auto;
    max-width: 100%;
    max-height: none;
    aspect-ratio: 1;
  }

  .image-detail {
    margin: 0;
    padding: 0;
  }

  .related-images {
    padding: var(--spacing-xl) 0 0;
    margin-top: 0;
    border-top: none;
  }

  .related-images h2 {
    padding: 0 var(--spacing-sm);
  }

  .related-images .image-grid {
    gap: var(--spacing-md);
    padding: 0;
    justify-content: center;
  }

  .related-images .card {
    margin: 0 auto;
  }

  .hero-img {
    margin: var(--spacing-md) auto;
    width: 200px;
  }
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}