/* ==================== CSS Variables ==================== */
:root {
  --koyoyama-red: #C41E3A;
  --koyoyama-red-light: #E63950;
  --koyoyama-red-dark: #9A1830;
  --carbon-black: #1A1A1A;
  --carbon-dark: #0D0D0D;
  --carbon-medium: #404040;
  --steel-gray-100: #F5F5F5;
  --steel-gray-200: #E0E0E0;
  --steel-gray-300: #BDBDBD;
  --steel-gray-400: #9E9E9E;
  --steel-gray-500: #757575;
  --color-success: #2E7D32;
  --color-warning: #F57C00;
  --font-primary: 'Inter', -apple-system, sans-serif;
  --font-display: 'Montserrat', sans-serif;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --shadow-card: 0 2px 12px rgba(0,0,0,0.1);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.2);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--carbon-black);
  background: #fff;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-primary);
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background: var(--koyoyama-red);
  color: white;
  border-color: var(--koyoyama-red);
}

.btn--primary:hover {
  background: var(--koyoyama-red-light);
  border-color: var(--koyoyama-red-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(196, 30, 58, 0.4);
}

.btn--dark {
  background: var(--carbon-black);
  color: white;
  border-color: var(--carbon-black);
}

.btn--dark:hover {
  background: var(--carbon-medium);
  border-color: var(--carbon-medium);
}

.btn--outline {
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,0.3);
}

.btn--outline:hover {
  border-color: white;
  background: rgba(255,255,255,0.1);
}

.btn--white {
  background: white;
  color: var(--koyoyama-red);
  border-color: white;
}

.btn--white:hover {
  background: var(--steel-gray-100);
  transform: translateY(-3px);
}

.btn--outline-white {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.5);
}

.btn--outline-white:hover {
  border-color: white;
  background: rgba(255,255,255,0.1);
}

.btn--sm {
  padding: 10px 20px;
  font-size: 14px;
}

.btn--lg {
  padding: 18px 36px;
  font-size: 16px;
}

.btn--full {
  width: 100%;
}

/* ==================== Navigation ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 13, 13, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(13, 13, 13, 1);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.navbar__top {
  background: var(--koyoyama-red);
  padding: 8px 0;
  text-align: center;
}

.navbar__top-text {
  color: white;
  font-size: 13px;
  font-weight: 600;
}

.navbar__main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  height: 80px;
}

.navbar__logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 900;
  color: white;
  letter-spacing: 3px;
}

.navbar__logo span {
  color: var(--koyoyama-red);
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}

.navbar__item {
  position: relative;
}

.navbar__link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.navbar__link:hover {
  color: white;
}

.navbar__link svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

.navbar__item:hover .navbar__link svg {
  transform: rotate(180deg);
}

.navbar__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 200px;
  background: var(--carbon-dark);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hover);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  padding: 8px 0;
}

.navbar__item:hover .navbar__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.navbar__dropdown a {
  display: block;
  padding: 10px 20px;
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  transition: all var(--transition-fast);
}

.navbar__dropdown a:hover {
  background: rgba(196, 30, 58, 0.3);
  color: white;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.navbar__search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.navbar__search:hover {
  background: rgba(255,255,255,0.15);
  color: white;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: white;
  transition: all var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--carbon-dark);
  z-index: 999;
  padding: 100px 40px 40px;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu__list li {
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.mobile-menu__list a {
  display: block;
  padding: 20px 0;
  color: white;
  font-size: 20px;
  font-weight: 600;
}

/* Search Modal */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.9);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 150px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.search-modal.active {
  opacity: 1;
  visibility: visible;
}

.search-modal__content {
  width: 100%;
  max-width: 700px;
  padding: 0 20px;
  position: relative;
}

.search-modal__input {
  width: 100%;
  padding: 20px 60px 20px 24px;
  font-size: 20px;
  background: var(--carbon-dark);
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-lg);
  color: white;
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-modal__input:focus {
  border-color: var(--koyoyama-red);
}

.search-modal__close {
  position: absolute;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 40px;
  color: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.search-modal__close:hover {
  color: white;
}

@media (max-width: 1024px) {
  .navbar__menu {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .navbar__main {
    padding: 0 20px;
  }
}

/* ==================== Hero Section ==================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--carbon-dark);
  position: relative;
  overflow: hidden;
  padding-top: 120px;
}

.hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 80%, rgba(196, 30, 58, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(196, 30, 58, 0.1) 0%, transparent 40%),
    linear-gradient(180deg, var(--carbon-dark) 0%, #0a0a0a 100%);
}

.hero__pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(90deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 80px);
}

.hero__container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__content {
  color: white;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(196, 30, 58, 0.2);
  border: 1px solid var(--koyoyama-red);
  border-radius: var(--radius-full);
  color: var(--koyoyama-red-light);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 24px;
}

.hero__title span {
  color: var(--koyoyama-red);
}

.hero__subtitle {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 40px;
  max-width: 500px;
}

.hero__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__tire {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__tire-img {
  width: 100%;
  max-width: 550px;
  animation: float 6s ease-in-out infinite;
  filter: drop-shadow(0 30px 60px rgba(0,0,0,0.5));
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

.hero__tire-img svg {
  width: 100%;
  height: auto;
}

@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .hero__subtitle {
    margin: 0 auto 40px;
  }
  .hero__buttons {
    justify-content: center;
  }
  .hero__tire {
    order: -1;
  }
  .hero__tire-img {
    max-width: 400px;
  }
}

@media (max-width: 768px) {
  .hero {
    padding-top: 100px;
  }
  .hero__container {
    padding: 0 20px;
  }
}

/* ==================== Tire Finder ==================== */
.tire-finder {
  background: var(--carbon-black);
  padding: 60px 0;
  position: relative;
}

.tire-finder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--koyoyama-red), transparent);
}

.tire-finder__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.tire-finder__header {
  text-align: center;
  margin-bottom: 40px;
}

.tire-finder__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: white;
  margin-bottom: 8px;
}

.tire-finder__subtitle {
  color: rgba(255,255,255,0.5);
  font-size: 16px;
}

.tire-finder__form {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

.finder-group {
  flex: 1;
  min-width: 180px;
}

.finder-label {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.finder-select {
  width: 100%;
  padding: 16px 20px;
  background: var(--carbon-medium);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23999' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

.finder-select:focus {
  outline: none;
  border-color: var(--koyoyama-red);
}

.finder-select option {
  background: var(--carbon-black);
  color: white;
}

.finder-result {
  margin-top: 30px;
  display: none;
}

.finder-result.active {
  display: block;
}

.finder-result__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.finder-result__empty {
  text-align: center;
  padding: 40px;
  color: rgba(255,255,255,0.5);
}

@media (max-width: 768px) {
  .tire-finder__container {
    padding: 0 20px;
  }
  .tire-finder__form {
    flex-direction: column;
  }
  .finder-group {
    width: 100%;
  }
}

/* ==================== Section Styles ==================== */
.section {
  padding: 100px 0;
}

.section__header {
  text-align: center;
  margin-bottom: 60px;
}

.section__tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(196, 30, 58, 0.1);
  color: var(--koyoyama-red);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--carbon-black);
  margin-bottom: 16px;
}

.section__desc {
  font-size: 18px;
  color: var(--steel-gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ==================== Categories ==================== */
.categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.category-card {
  position: relative;
  height: 450px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  background: var(--carbon-dark);
  display: block;
}

.category-card__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,0.9) 100%);
  z-index: 1;
}

.category-card__image {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-slow);
}

.category-card:hover .category-card__image {
  transform: scale(1.05);
}

.category-card__icon {
  width: 280px;
  height: 280px;
  opacity: 0.3;
  transition: opacity var(--transition-normal);
}

.category-card:hover .category-card__icon {
  opacity: 0.4;
}

.category-card__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px;
  z-index: 2;
  color: white;
}

.category-card__code {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--koyoyama-red-light);
  margin-bottom: 8px;
}

.category-card__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.category-card__count {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}

.category-card__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: white;
  font-weight: 600;
  font-size: 15px;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-normal);
}

.category-card:hover .category-card__link {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .categories {
    grid-template-columns: 1fr;
  }
  .category-card {
    height: 350px;
  }
}

/* ==================== Products Grid ==================== */
.products {
  background: var(--steel-gray-100);
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.product-card__image {
  position: relative;
  aspect-ratio: 1;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card__icon {
  width: 70%;
  height: 70%;
  opacity: 0.6;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__icon {
  transform: scale(1.1) rotate(5deg);
}

.product-card__badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 12px;
  background: var(--koyoyama-red);
  color: white;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
}

.product-card__body {
  padding: 24px;
}

.product-card__series {
  font-size: 11px;
  font-weight: 700;
  color: var(--koyoyama-red);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.product-card__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--carbon-black);
  margin-bottom: 8px;
}

.product-card__spec {
  font-size: 14px;
  color: var(--steel-gray-500);
  margin-bottom: 16px;
}

.product-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.product-card__price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--koyoyama-red);
}

.product-card__price span {
  font-size: 13px;
  font-weight: 400;
  color: var(--steel-gray-400);
}

@media (max-width: 1200px) {
  .products__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .products__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .products__grid {
    grid-template-columns: 1fr;
  }
}

/* ==================== Features ==================== */
.features {
  background: var(--carbon-dark);
}

.features .section__title {
  color: white;
}

.features .section__desc {
  color: rgba(255,255,255,0.5);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(196, 30, 58, 0.3);
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  background: linear-gradient(135deg, var(--koyoyama-red) 0%, var(--koyoyama-red-dark) 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-card__icon svg {
  width: 36px;
  height: 36px;
  color: white;
}

.feature-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: white;
  margin-bottom: 12px;
}

.feature-card__desc {
  font-size: 15px;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
}

@media (max-width: 1200px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .features__grid {
    grid-template-columns: 1fr;
  }
}

/* ==================== Specs Table ==================== */
.table-wrapper {
  overflow-x: auto;
}

.specs__table {
  width: 100%;
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  min-width: 700px;
}

.specs__table th,
.specs__table td {
  padding: 20px 24px;
  text-align: left;
  border-bottom: 1px solid var(--steel-gray-200);
}

.specs__table th {
  background: var(--steel-gray-100);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--steel-gray-500);
}

.specs__table td {
  font-size: 15px;
  color: var(--carbon-black);
}

.specs__table tr:last-child td {
  border-bottom: none;
}

.specs__table tr:hover td {
  background: var(--steel-gray-100);
}

.specs__table .highlight {
  color: var(--koyoyama-red);
  font-weight: 700;
}

/* ==================== CTA ==================== */
.cta {
  background: linear-gradient(135deg, var(--koyoyama-red) 0%, var(--koyoyama-red-dark) 100%);
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
  animation: pulse 6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.cta__content {
  position: relative;
  z-index: 1;
}

.cta__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: white;
  margin-bottom: 20px;
}

.cta__desc {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta__buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==================== Footer ==================== */
.footer {
  background: var(--carbon-dark);
  padding: 80px 0 40px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: white;
  margin-bottom: 20px;
}

.footer__logo span {
  color: var(--koyoyama-red);
}

.footer__desc {
  font-size: 15px;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  margin-bottom: 24px;
}

.footer__social {
  display: flex;
  gap: 12px;
}

.footer__social a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  color: white;
  font-size: 18px;
  transition: all var(--transition-fast);
}

.footer__social a:hover {
  background: var(--koyoyama-red);
  transform: translateY(-3px);
}

.footer__title {
  font-size: 14px;
  font-weight: 700;
  color: white;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.footer__links {
  list-style: none;
}

.footer__links li {
  margin-bottom: 12px;
}

.footer__links a {
  color: rgba(255,255,255,0.5);
  font-size: 15px;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--koyoyama-red);
}

.footer__links--inline {
  display: flex;
  gap: 24px;
}

.footer__links--inline a {
  color: rgba(255,255,255,0.4);
  font-size: 14px;
}

.footer__bottom {
  max-width: 1400px;
  margin: 60px auto 0;
  padding: 30px 40px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer__copyright {
  font-size: 14px;
  color: rgba(255,255,255,0.4);
}

@media (max-width: 1200px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 20px;
  }
  .footer__bottom {
    flex-direction: column;
    text-align: center;
    padding: 30px 20px 0;
  }
}

/* ==================== Page Header ==================== */
.page-header {
  background: var(--carbon-dark);
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(196, 30, 58, 0.1) 0%, transparent 70%);
}

.page-header__content {
  position: relative;
  z-index: 1;
}

.page-header__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  color: white;
  margin-bottom: 16px;
}

.page-header__title span {
  color: var(--koyoyama-red);
}

.page-header__breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: rgba(255,255,255,0.5);
  font-size: 15px;
}

.page-header__breadcrumb a {
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
}

.page-header__breadcrumb a:hover {
  color: white;
}

/* ==================== Products Page ==================== */
.products-filters {
  background: white;
  padding: 30px 0;
  border-bottom: 1px solid var(--steel-gray-200);
  position: sticky;
  top: 80px;
  z-index: 100;
}

.products-filters__container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 20px;
  background: var(--steel-gray-100);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--carbon-medium);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--koyoyama-red);
  color: white;
  border-color: var(--koyoyama-red);
}

.products-list {
  padding: 60px 0;
}

.products-list__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

@media (max-width: 1200px) {
  .products-list__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .products-filters__container {
    padding: 0 20px;
    overflow-x: auto;
    flex-wrap: nowrap;
  }
  .filter-btn {
    flex-shrink: 0;
  }
  .products-list__grid {
    grid-template-columns: 1fr;
    padding: 0 20px;
    gap: 24px;
  }
}

/* ==================== About Page ==================== */
.about-intro {
  padding: 100px 0;
}

.about-intro__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-intro__content h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 24px;
}

.about-intro__content p {
  color: var(--steel-gray-500);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-intro__image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-intro__tire {
  width: 400px;
  height: 400px;
  animation: float 6s ease-in-out infinite;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  background: var(--carbon-dark);
  padding: 80px 40px;
}

.stat-item {
  text-align: center;
}

.stat-item__number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--koyoyama-red);
  margin-bottom: 8px;
}

.stat-item__label {
  font-size: 16px;
  color: rgba(255,255,255,0.6);
}

@media (max-width: 1024px) {
  .about-intro__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 60px 20px;
  }
}

/* ==================== Contact Page ==================== */
.contact-section {
  padding: 100px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.contact-info {
  background: var(--carbon-dark);
  padding: 40px;
  border-radius: var(--radius-xl);
}

.contact-info__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  margin-bottom: 32px;
}

.contact-info__item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  background: rgba(196, 30, 58, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--koyoyama-red);
  flex-shrink: 0;
}

.contact-info__text h4 {
  color: white;
  font-size: 16px;
  margin-bottom: 4px;
}

.contact-info__text p,
.contact-info__text a {
  color: rgba(255,255,255,0.6);
  font-size: 15px;
}

.contact-info__text a:hover {
  color: var(--koyoyama-red);
}

.contact-form {
  background: white;
  padding: 40px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
}

.contact-form__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--carbon-medium);
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 16px;
  background: var(--steel-gray-100);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-size: 16px;
  color: var(--carbon-black);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--koyoyama-red);
  background: white;
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr;
    padding: 0 20px;
  }
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ==================== Animations ==================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==================== Utilities ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.hidden { display: none !important; }
.visible { display: block !important; }