/* ========================================
   CSS Variables
   ======================================== */
:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --secondary-dark: #2980b9;
  --accent-color: #e74c3c;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #ffffff;
  --bg-alt: #f8f9fa;
  --border-color: #e0e0e0;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 5px 20px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
  --max-width: 1200px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 2.5rem;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--bg-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--secondary-dark);
}

ul {
  list-style: none;
}

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

/* ========================================
   Navigation
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
}

.logo img {
  height: 50px;
  width: auto;
}

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

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  transition: var(--transition);
}

.nav-link:hover {
  background-color: var(--bg-alt);
  color: var(--secondary-color);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--text-color);
  transition: var(--transition);
}

/* ========================================
   Hero Section (Slider)
   ======================================== */
.hero {
  margin-top: 70px;
  position: relative;
  height: 60vh;
  min-height: 400px;
  max-height: 600px;
  overflow: hidden;
}

.slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

.slide.active {
  opacity: 1;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.8);
  border: none;
  font-size: 2rem;
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: var(--transition);
  z-index: 10;
}

.slider-btn:hover {
  background: rgba(255, 255, 255, 0.95);
}

.slider-btn.prev {
  left: var(--spacing-md);
}

.slider-btn.next {
  right: var(--spacing-md);
}

.slider-dots {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
  z-index: 10;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: var(--transition);
}

.dot.active {
  background: rgba(255, 255, 255, 1);
}

/* ========================================
   Sections
   ======================================== */
.section {
  padding: var(--spacing-xl) 0;
}

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

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

/* ========================================
   Products
   ======================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.product-card {
  background: var(--bg-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: var(--transition);
}

.product-card a:hover .product-image {
  opacity: 0.9;
}

.product-card > :not(a) {
  padding: 0 var(--spacing-md);
}

.product-card > :last-child {
  padding-bottom: var(--spacing-md);
}

.product-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: var(--spacing-md) 0 var(--spacing-sm);
  padding: 0 var(--spacing-md);
}

.product-subtitle {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-sm);
}

.product-description {
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   Specialty
   ======================================== */
.specialty-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.specialty-card {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--bg-color);
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.specialty-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.specialty-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
}

.specialty-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.specialty-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.specialty-description {
  color: var(--text-light);
  line-height: 1.6;
}

/* ========================================
   Media Publications
   ======================================== */
.media-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.media-logos img {
  max-height: 36px;
  width: auto;
  filter: grayscale(100%);
  opacity: 0.5;
  transition: var(--transition);
}

.media-logos img:hover {
  filter: grayscale(0%);
  opacity: 0.9;
}

.media-logos img.invert-logo {
  filter: grayscale(100%) invert(1);
}

.media-logos img.invert-logo:hover {
  filter: grayscale(0%) invert(1);
}

/* ========================================
   Supporters
   ======================================== */
.supporters-list {
  max-width: 800px;
  margin: var(--spacing-lg) auto 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.supporters-list li {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-color);
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.supporters-list li:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-lg);
}

.supporters-list a {
  font-size: 1.1rem;
  font-weight: 500;
  display: block;
}

/* ========================================
   Company Profile
   ======================================== */
.profile-table {
  max-width: 900px;
  margin: var(--spacing-lg) auto 0;
  background: var(--bg-color);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.profile-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 1px solid var(--border-color);
}

.profile-row:last-child {
  border-bottom: none;
}

.profile-label {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-alt);
  font-weight: 600;
  color: var(--primary-color);
}

.profile-value {
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-color);
}

.tokusho-link {
  text-align: center;
  margin-top: var(--spacing-lg);
}

.tokusho-link a {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--secondary-color);
  color: white;
  border-radius: 4px;
  font-weight: 600;
  transition: var(--transition);
}

.tokusho-link a:hover {
  background: var(--secondary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  color: white;
  transition: var(--transition);
}

.social-link:hover {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  transform: translateY(-2px);
}

.social-icon {
  font-size: 1.5rem;
  font-weight: bold;
}

.copyright {
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--spacing-md);
  font-size: 0.9rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: white;
    box-shadow: var(--shadow);
    padding: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .section-title {
    font-size: 2rem;
  }

  .profile-row {
    grid-template-columns: 1fr;
  }

  .profile-label {
    border-bottom: none;
  }

  .slider-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 1.5rem;
  }

  .slider-btn.prev {
    left: var(--spacing-sm);
  }

  .slider-btn.next {
    right: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .product-title {
    font-size: 1.5rem;
  }

  .specialty-title {
    font-size: 1.3rem;
  }
}