:root {
  --color-text: #1d1d1f;
  --color-text-light: #6e6e73;
  --color-bg: #ffffff;
  --color-bg-light: #f5f5f7;
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-border: #d2d2d7;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

a {
  color: var(--color-text);
  text-decoration: none;
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

a:hover {
  color: var(--color-accent);
}

button {
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

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

.product-image {
  width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: var(--spacing-md);
  background-color: var(--color-bg-light);
}

.kit-image-container,
.part-image-container {
  margin-bottom: var(--spacing-lg);
}

.image-description {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
  font-style: italic;
  line-height: 1.5;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Mobile-first improvements */
@media (max-width: 768px) {
  :root {
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.25rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  body {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
  }
}

/* Header */
.header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.8);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text);
  text-transform: uppercase;
}

.logo:hover {
  color: var(--color-text);
  opacity: 0.8;
}

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

.nav-link {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  padding: var(--spacing-xs) 0;
  position: relative;
}

.nav-link:hover {
  color: var(--color-text);
}

.nav-link.active {
  color: var(--color-text);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--color-text);
}

/* Footer */
.footer {
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg) 0;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  text-align: center;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

/* Buttons */
.button {
  display: inline-block;
  padding: 1.1rem 2.2rem;
  font-size: 1.1rem;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
  text-align: center;
}

.button-primary {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.button-primary:hover {
  background-color: var(--color-text-light);
  color: var(--color-bg);
  transform: translateY(-2px);
}

@media (hover: none) and (pointer: coarse) {
  .button-primary:hover {
    transform: none;
  }
}

.button-secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-text);
}

.button-secondary:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

@media (hover: none) and (pointer: coarse) {
  .button-secondary:hover {
    background-color: transparent;
    color: var(--color-text);
  }
}

.add-to-cart-button {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 1.1rem 2.2rem;
  font-size: 1.1rem;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
  cursor: pointer;
  display: inline-block;
}

.add-to-cart-button:hover {
  background-color: var(--color-text-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

@media (hover: none) and (pointer: coarse) {
  .add-to-cart-button:hover {
    transform: none;
  }
}

.add-to-cart-button:active {
  transform: translateY(0);
}

.add-to-cart-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Product Cards */
.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 0;
  background-color: var(--color-bg);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  height: 100%;
  overflow: hidden;
}

.product-card .product-card-content {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  gap: var(--spacing-sm);
}

.product-card:hover {
  border-color: var(--color-text);
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

@media (hover: none) and (pointer: coarse) {
  .product-card:hover {
    transform: none;
  }
  
  .product-card:hover .product-card-image {
    transform: none;
  }
}

.product-card-name {
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0;
  color: var(--color-text);
  line-height: 1.3;
}

.product-card-description {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  flex-grow: 1;
  margin-bottom: 0;
}

.product-card-difficulty {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text);
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  width: fit-content;
  margin-top: auto;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background-color: var(--color-bg-light);
}

.product-card-price {
  font-size: 1.625rem;
  font-weight: 600;
  margin-top: var(--spacing-xs);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.product-card-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: 12px 12px 0 0;
  background-color: var(--color-bg-light);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-card-image {
  transform: scale(1.06);
}

/* Homepage */
.home {
  min-height: 100vh;
}

.hero {
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  min-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 2;
}

.hero-splatter {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1;
  pointer-events: none;
  opacity: 0.25;
  width: 100%;
  max-width: 1200px;
}

.splatter-image {
  width: 100%;
  height: auto;
  object-fit: contain;
  transform: rotate(0deg);
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  margin-bottom: var(--spacing-md);
  line-height: 1.05;
}

.hero-subtitle {
  font-size: 1.375rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
  line-height: 1.5;
  font-weight: 400;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.statements {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.statements-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.statement {
  text-align: center;
}

.statement-title {
  font-size: 1.375rem;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.statement-text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Flagship Spotlight - Apple Style */
.flagship-spotlight {
  padding: 0;
  margin: 0;
  background-color: var(--color-bg);
}

.flagship-hero {
  display: block;
  position: relative;
  width: 100%;
  min-height: 80vh;
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.flagship-hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  background-color: var(--color-bg-light);
  background-image: url('./flagship-hero.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.flagship-bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.85);
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), filter 0.6s ease;
  display: block;
}

.flagship-hero:hover .flagship-bg-image {
  transform: scale(1.02);
  filter: brightness(0.9);
}

.flagship-hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0.85) 100%);
}

.flagship-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-md);
  opacity: 0.7;
}

.flagship-title {
  font-size: 5.5rem;
  font-weight: 600;
  letter-spacing: -0.05em;
  margin-bottom: var(--spacing-md);
  line-height: 1.05;
  color: var(--color-text);
}

.flagship-description {
  font-size: 2.25rem;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.03em;
}

.flagship-subdescription {
  font-size: 1.125rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

.flagship-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.flagship-price {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.flagship-cta {
  font-size: 1.25rem;
  color: var(--color-text);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: opacity 0.3s ease;
}

.flagship-hero:hover .flagship-cta {
  opacity: 0.7;
}

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

.section-title {
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

/* Page layouts */
.page-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.page-title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-sm);
}

.page-description {
  font-size: 1.125rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.kits-page,
.parts-page,
.guides-page,
.about-page {
  padding: var(--spacing-lg) 0;
  min-height: 100vh;
}

.kits-grid,
.categories-grid,
.parts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.category-card {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-md);
  background-color: var(--color-bg);
  transition: var(--transition);
  text-align: center;
}

.category-card:hover {
  border-color: var(--color-text);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

@media (hover: none) and (pointer: coarse) {
  .category-card:hover {
    transform: none;
  }
}

.category-name {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-xs);
}

.category-description {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.category-header {
  margin-bottom: var(--spacing-xl);
}

.back-link {
  display: inline-block;
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  transition: var(--transition);
}

.back-link:hover {
  color: var(--color-text);
}

.category-title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Detail pages */
.kit-detail,
.part-detail,
.guide-detail {
  padding: var(--spacing-lg) 0;
  min-height: 100vh;
}

.kit-detail-header,
.part-detail-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.kit-detail-main,
.part-detail-main {
  max-width: 800px;
  margin: 0 auto;
}

.kit-title,
.part-title,
.guide-title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
}

.kit-intro,
.part-explanation {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.part-explanation {
  font-size: 1.125rem;
  color: var(--color-text);
}

.kit-meta {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.kit-difficulty {
  display: inline-block;
  font-size: 0.9375rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.kit-price,
.part-price {
  font-size: 1.5rem;
  font-weight: 500;
}

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

.kit-detail-content,
.part-detail-content,
.guide-content {
  max-width: 800px;
  margin: 0 auto;
}

.detail-section {
  margin-bottom: var(--spacing-xl);
}

.section-heading {
  font-size: 1.75rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-md);
}

.subsection-heading {
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.section-text {
  font-size: 1.125rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.detail-list,
.spec-list,
.used-in-list {
  list-style: none;
  padding: 0;
}

.detail-list-item,
.spec-item {
  font-size: 1.125rem;
  line-height: 1.7;
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-md);
  position: relative;
  color: var(--color-text);
}

.detail-list-item::before,
.spec-item::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-text-light);
}

.used-in-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.used-in-link {
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: var(--color-text-light);
  text-underline-offset: 4px;
  transition: var(--transition);
}

.used-in-link:hover {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

/* Guides */
.guides-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.guide-item {
  display: block;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.guide-item:hover {
  border-bottom-color: var(--color-text);
}

.guide-item:last-child {
  border-bottom: none;
}

.guide-title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

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

.guide-paragraph {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text);
}

/* About */
.about-content {
  max-width: 700px;
  margin: 0 auto;
}

.about-title {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.about-intro {
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
}

.about-text p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text);
}

.about-note {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-lg);
}

.note-text {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.note-text strong {
  color: var(--color-text);
  font-weight: 500;
}

/* 404 */
.not-found {
  padding: var(--spacing-xl) 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.not-found-content {
  text-align: center;
}

.not-found-title {
  font-size: 6rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-md);
}

.not-found-text {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

/* Responsive */
@media (max-width: 768px) {
  /* Header mobile improvements */
  .header {
    border-bottom-width: 1px;
  }
  
  .header-container {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .logo {
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    font-weight: 700;
  }
  
  .hero-splatter {
    display: none;
  }
  
  .nav {
    gap: var(--spacing-md);
    flex-wrap: nowrap;
    justify-content: space-around;
    width: 100%;
    padding: var(--spacing-xs) 0;
  }
  
  .nav-link {
    font-size: 0.9375rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Footer mobile */
  .footer {
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-lg);
  }
  
  .footer-container {
    padding: 0 var(--spacing-md);
  }

  /* Hero mobile */
  .hero {
    padding: var(--spacing-lg) var(--spacing-sm);
    min-height: 65vh;
  }

  .hero-title {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
  }

  .hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    padding: 0 var(--spacing-sm);
  }

  .hero-actions {
    flex-direction: row;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 0 var(--spacing-sm);
  }
  
  .button {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }
  
  .flagship-hero {
    min-height: 70vh;
  }
  
  .flagship-hero {
    min-height: 60vh;
  }
  
  .flagship-hero-content {
    min-height: 60vh;
    padding: var(--spacing-lg) var(--spacing-sm);
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.9) 100%);
  }
  
  .flagship-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
  }
  
  .flagship-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
  }
  
  .flagship-subdescription {
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-sm);
  }
  
  .flagship-footer {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
  
  .flagship-price {
    font-size: 1.5rem;
  }
  
  .flagship-cta {
    font-size: 0.9375rem;
  }

  /* Statements mobile */
  .statements {
    padding: var(--spacing-lg) 0;
  }

  .statements-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .statement {
    padding: 0 var(--spacing-sm);
  }

  /* Products grid mobile */
  .featured {
    padding: var(--spacing-lg) 0;
  }

  .products-grid,
  .kits-grid,
  .categories-grid,
  .parts-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .section-title {
    font-size: 1.75rem;
    padding: 0 var(--spacing-sm);
  }

  /* Page titles mobile */
  .page-header {
    padding: 0 var(--spacing-sm);
  }

  .page-title,
  .category-title,
  .kit-title,
  .part-title,
  .guide-title,
  .about-title {
    font-size: 1.875rem;
    line-height: 1.2;
  }

  .page-description {
    font-size: 1rem;
    padding: 0 var(--spacing-xs);
  }

  /* Kit detail mobile */
  .kit-detail,
  .part-detail,
  .guide-detail,
  .about-page {
    padding: var(--spacing-md) 0;
  }

  .kit-detail-header,
  .part-detail-header {
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
  }

  .kit-intro,
  .part-explanation {
    font-size: 1.125rem;
    padding: 0 var(--spacing-xs);
  }

  .kit-meta {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
  }

  .add-to-cart-button {
    width: 100%;
    padding: 1.1rem 1.65rem;
    font-size: 1.1rem;
    margin-top: var(--spacing-sm);
  }

  /* Detail sections mobile */
  .kit-detail-content,
  .part-detail-content,
  .guide-content,
  .about-content {
    padding: 0 var(--spacing-sm);
  }

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

  .section-heading {
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
  }

  .section-text,
  .detail-list-item,
  .spec-item {
    font-size: 1rem;
    line-height: 1.7;
  }

  .detail-list-item,
  .spec-item {
    padding-left: var(--spacing-md);
  }

  /* Guide mobile */
  .guides-list {
    padding: 0 var(--spacing-sm);
  }

  .guide-item {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .guide-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
  }

  .guide-description {
    font-size: 0.9375rem;
  }

  .guide-paragraph {
    font-size: 1rem;
    line-height: 1.75;
  }

  /* About mobile */
  .about-text {
    padding: 0 var(--spacing-xs);
  }

  .about-intro {
    font-size: 1.125rem;
  }

  .about-text p {
    font-size: 1rem;
    line-height: 1.75;
  }

  .about-note {
    margin: var(--spacing-md) var(--spacing-sm) 0;
    padding: var(--spacing-md);
  }

  /* Category pages mobile */
  .category-header {
    padding: 0 var(--spacing-sm);
    margin-bottom: var(--spacing-md);
  }

  .back-link {
    font-size: 0.9375rem;
    padding: var(--spacing-xs) 0;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  /* Product cards mobile */
  .product-card .product-card-content {
    padding: var(--spacing-md);
  }
  
  .product-card-image {
    height: 180px;
  }

  .product-card-name {
    font-size: 1.25rem;
  }
  
  .product-card-description {
    font-size: 0.9375rem;
    line-height: 1.6;
  }
  
  .product-card-price {
    font-size: 1.5rem;
  }
  
  .product-card-difficulty {
    font-size: 0.6875rem;
    padding: 0.3125rem 0.625rem;
    letter-spacing: 0.06em;
  }

  /* Category cards mobile */
  .category-card {
    padding: var(--spacing-md);
  }

  .category-name {
    font-size: 1.375rem;
  }

  /* 404 mobile */
  .not-found {
    padding: var(--spacing-xl) var(--spacing-sm);
  }

  .not-found-title {
    font-size: 4rem;
  }

  .not-found-text {
    font-size: 1.125rem;
    padding: 0 var(--spacing-sm);
  }

  .not-found-content .button {
    width: auto;
    padding: 1rem 2rem;
  }
}

/* Extra small devices */
@media (max-width: 480px) {
  .hero-title {
    font-size: 1.875rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .page-title,
  .kit-title,
  .part-title,
  .guide-title,
  .about-title {
    font-size: 1.625rem;
  }

  .nav {
    gap: var(--spacing-xs);
  }

  .nav-link {
    font-size: 0.875rem;
    padding: var(--spacing-xs);
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  a,
  button {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
  }

  .button,
  .add-to-cart-button,
  .nav-link,
  .product-card,
  .category-card {
    min-height: 44px;
  }

  .product-card:active,
  .category-card:active {
    transform: translateY(0);
    opacity: 0.9;
  }
  
  .hero-splatter {
    display: none;
  }
}