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

/* Dark Theme (default) */
:root {
  --color-bg: #151010;
  --color-bg-alt: #1e1814;
  --color-text: #f5f0eb;
  --color-text-light: #c4b8a8;
  --color-accent: #d4a85c;
  --color-accent-dark: #e8c078;
  --color-card: #221c17;
  --color-card-border: rgba(212, 168, 92, 0.2);
  --color-header-bg: rgba(21, 16, 16, 0.97);
  --color-hero-overlay1: rgba(21, 16, 16, 0.7);
  --color-hero-overlay2: rgba(21, 16, 16, 0.8);
  --color-shadow: rgba(0, 0, 0, 0.5);
  --font-main: 'Noto Sans JP', sans-serif;
  --font-display: 'Oswald', sans-serif;
  --max-width: 1200px;
  --transition: 0.3s ease;
}

/* Light Theme */
[data-theme="light"] {
  --color-bg: #faf8f5;
  --color-bg-alt: #f0ebe4;
  --color-text: #2c2420;
  --color-text-light: #6b5d50;
  --color-accent: #b8860b;
  --color-accent-dark: #9a7209;
  --color-card: #ffffff;
  --color-card-border: rgba(184, 134, 11, 0.15);
  --color-header-bg: rgba(250, 248, 245, 0.97);
  --color-hero-overlay1: rgba(250, 248, 245, 0.3);
  --color-hero-overlay2: rgba(250, 248, 245, 0.4);
  --color-shadow: rgba(44, 36, 32, 0.1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 2;
  font-size: 16px;
  transition: background var(--transition), color var(--transition);
}

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-accent); }

/* Header */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--color-header-bg);
  backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid var(--color-card-border);
  transition: background var(--transition);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.2rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-text);
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-light);
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.nav-links a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-card-border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: border-color var(--transition), transform var(--transition);
}
.theme-toggle:hover {
  border-color: var(--color-accent);
  transform: scale(1.1);
}

/* Hero Slideshow */
.hero-slideshow {
  position: relative;
  width: 100%;
  height: 70vh;
  overflow: hidden;
  margin-top: 72px;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 2.5s ease;
}

.hero-slide.active {
  opacity: 1;
}

.hero-indicators {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.8rem;
  z-index: 10;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.indicator.active {
  background: var(--color-accent);
  transform: scale(1.3);
}

/* Section */
.section {
  padding: 7rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 1rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: 3.5rem;
  font-size: 1.05rem;
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
}

.product-card {
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: 0;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px var(--color-shadow);
  border-color: var(--color-accent);
}

.product-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-card-border);
}

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

.slide-indicator {
  position: absolute;
  bottom: 0.5rem;
  right: 0.5rem;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
}

.product-info {
  padding: 1.8rem;
}

.product-info h3 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
  color: var(--color-text);
  letter-spacing: 1px;
}

.product-info .serial {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--color-accent);
  text-transform: uppercase;
}

.product-info p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.8;
}

.product-price {
  display: block;
  margin-top: 1rem;
  font-size: 1.2rem;
  color: var(--color-accent-dark);
  font-weight: 600;
}

/* Custom Order Section */
.custom-section {
  background: var(--color-bg-alt);
  max-width: 100%;
  padding: 7rem 2rem;
}

.custom-section .section-title,
.custom-section .section-subtitle {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.custom-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.custom-card {
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: 0;
  padding: 2rem;
}

.custom-card h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.custom-card ul,
.custom-card ol {
  padding-left: 1.2rem;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.custom-card li {
  margin-bottom: 0.5rem;
}

.custom-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* Category Title */
.category-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-accent);
  margin-top: 3.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-card-border);
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 600;
}

/* About */
.about-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.1rem;
  line-height: 2.4;
}

/* Contact */
.contact-section {
  background: var(--color-bg-alt);
  padding: 7rem 2rem;
  transition: background var(--transition);
}

.contact-info {
  text-align: center;
}

.contact-info p {
  color: var(--color-text-light);
  margin-bottom: 2rem;
  font-size: 1.05rem;
  line-height: 2;
}

.btn {
  display: inline-block;
  padding: 1.1rem 2.8rem;
  background: var(--color-accent);
  color: var(--color-bg);
  border: none;
  border-radius: 3px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.btn:hover {
  background: var(--color-accent-dark);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.btn-instagram {
  padding: 1.2rem 3rem;
  font-size: 1.05rem;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

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

.modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.modal-slider img {
  max-width: 80vw;
  max-height: 75vh;
  object-fit: contain;
}

.modal-close {
  position: absolute;
  top: -2rem;
  right: -1rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-controls {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 1.5rem;
}

.modal-prev,
.modal-next {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.3s, background 0.3s;
}

.modal-prev:hover,
.modal-next:hover {
  border-color: var(--color-accent);
  background: rgba(212, 168, 92, 0.2);
}

.modal-counter {
  color: #fff;
  font-size: 1rem;
  letter-spacing: 2px;
}

/* Footer */
.footer {
  text-align: center;
  padding: 3.5rem 2rem;
  color: var(--color-text-light);
  font-size: 0.9rem;
  border-top: 1px solid var(--color-card-border);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  order: 3;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Responsive */
@media (max-width: 1024px) {
  .nav-links { gap: 1.5rem; }
  .nav-links a { font-size: 0.85rem; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: var(--color-header-bg);
    backdrop-filter: blur(10px);
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--color-card-border);
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    font-size: 1rem;
    padding: 0.5rem 0;
  }

  .header-inner { padding: 1rem 1.5rem; }
  .hero-slideshow { height: 50vh; margin-top: 60px; }
  .section { padding: 4rem 1.5rem; }
  .section-title { font-size: 1.7rem; }
  .section-subtitle { font-size: 0.95rem; margin-bottom: 2.5rem; }
  .product-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .product-info { padding: 1.4rem; }
  .custom-section { padding: 4rem 1.5rem; }
  .custom-content { grid-template-columns: 1fr; }
  .contact-section { padding: 4rem 1.5rem; }
  .btn { padding: 1rem 2rem; font-size: 0.95rem; }
  .btn-instagram { padding: 1rem 2rem; font-size: 0.95rem; }
  .about-content { font-size: 1rem; line-height: 2.2; }
  .footer { padding: 2.5rem 1.5rem; }

  .modal-slider img {
    max-width: 95vw;
    max-height: 60vh;
  }
}

@media (max-width: 480px) {
  .logo { font-size: 1.3rem; }
  .hero-slideshow { height: 40vh; }
  .product-info h3 { font-size: 1.05rem; }
  .product-price { font-size: 1.05rem; }
}