:root {
  --color-primary: #1a1a1a;
  --color-primary-light: #3a3a3a;
  --color-primary-dark: #000;
  --color-accent: #8b1a1a;
  --color-accent-light: #b04a4a;
  --color-bg: #f5f0e8;
  --color-bg-card: #fff;
  --color-text: #2d2b29;
  --color-text-light: #7a7672;
  --color-text-on-dark: #f0ece6;
  --color-border: #e0ddd8;

  --font-sans: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-serif: 'Zen Old Mincho', 'Yu Mincho', serif;

  --container-max: 1140px;
  --container-padding: 20px;

  --header-height: 72px;

  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

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

.sp-only {
  display: none;
}

@media (max-width: 767px) {
  .sp-only {
    display: block;
  }
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-on-dark);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.logo-mark {
  font-size: 1.5rem;
  line-height: 1;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  color: var(--color-text-on-dark);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  border-radius: 4px;
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.cta-btn {
  background: var(--color-accent);
  color: #fff;
  font-weight: 500;
  padding: 10px 24px;
  border-radius: 6px;
}

.nav-link.cta-btn:hover {
  background: var(--color-accent-light);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-on-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

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

@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.98);
    backdrop-filter: blur(12px);
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .nav.active {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 16px;
  }

  .nav-link {
    font-size: 1.125rem;
    padding: 12px 24px;
  }
}

/* Hero */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(26, 26, 26, 0.6) 0%, rgba(0, 0, 0, 0.4) 100%),
    url('https://images.unsplash.com/photo-1615361200141-f45040f367be?w=1600&q=80') center/cover no-repeat;
  transform: scale(1.05);
  animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
  from { transform: scale(1); }
  to { transform: scale(1.1); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, var(--color-bg) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-text-on-dark);
  padding: 0 var(--container-padding);
  animation: heroFadeIn 1.2s ease-out;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-subtitle {
  font-size: 0.875rem;
  letter-spacing: 0.3em;
  margin-bottom: 20px;
  opacity: 0.8;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.08em;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  line-height: 1.8;
  opacity: 0.85;
  margin-bottom: 40px;
}

.hero-cta {
  display: inline-block;
  padding: 16px 48px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  border-radius: 8px;
  transition: background var(--transition), transform var(--transition);
}

.hero-cta:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-on-dark);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  opacity: 0.6;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-text-on-dark), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(0.5); opacity: 0.3; }
  50% { transform: scaleY(1); opacity: 1; }
}

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.3;
  color: var(--color-primary);
}

.section-divider {
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin: 20px auto 0;
}

/* About */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about-image img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.about-image:hover img {
  transform: scale(1.05);
}

.about-text {
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--color-text-light);
}

.about-text p + p {
  margin-top: 20px;
}

.about-emphasis {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: var(--color-primary);
  font-weight: 500;
  padding: 20px 24px;
  background: var(--color-bg-card);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
}

@media (max-width: 767px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-image img {
    height: 300px;
  }
}

/* Features */
.features {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
}

.features .section-title {
  color: var(--color-text-on-dark);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 40px 32px;
  text-align: center;
  transition: transform var(--transition), background var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.08);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  color: var(--color-accent-light);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.feature-desc {
  font-size: 0.875rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 767px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card {
    padding: 32px 24px;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Craft */
.craft-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.craft-steps {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.craft-step {
  display: flex;
  gap: 20px;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}

.step-body h3 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.step-body p {
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--color-text-light);
}

.craft-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.craft-image img {
  width: 100%;
  height: 600px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.craft-image:hover img {
  transform: scale(1.05);
}

@media (max-width: 767px) {
  .craft-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .craft-image {
    order: -1;
  }

  .craft-image img {
    height: 300px;
  }
}

/* Gallery */
.gallery {
  background: var(--color-primary);
}

.gallery .section-title {
  color: var(--color-text-on-dark);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.gallery-item {
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px 24px 20px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: var(--color-text-on-dark);
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  transform: translateY(10px);
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
}

.gallery-item:hover figcaption {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 767px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item img {
    height: 280px;
  }

  .gallery-item figcaption {
    opacity: 1;
    transform: translateY(0);
  }
}

/* CTA Section */
.cta-section {
  position: relative;
  text-align: center;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(26, 26, 26, 0.85) 0%, rgba(0, 0, 0, 0.75) 100%),
    url('https://images.unsplash.com/photo-1559737558-2f5a35f4523b?w=1600&q=80') center/cover no-repeat;
  background-attachment: fixed;
}

.cta-content {
  position: relative;
  padding: 120px 0;
  color: var(--color-text-on-dark);
}

.cta-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.cta-desc {
  font-size: 1rem;
  font-weight: 300;
  opacity: 0.8;
  margin-bottom: 40px;
}

.cta-button {
  display: inline-block;
  padding: 18px 56px;
  background: var(--color-accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  border-radius: 8px;
  transition: background var(--transition), transform var(--transition);
}

.cta-button:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background: var(--color-primary-dark);
  color: var(--color-text-on-dark);
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  font-size: 0.875rem;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.footer-links a:hover {
  opacity: 1;
}

.footer-bottom {
  padding-top: 30px;
  text-align: center;
  font-size: 0.8125rem;
  opacity: 0.5;
}

@media (max-width: 767px) {
  .footer-content {
    flex-direction: column;
    gap: 24px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 16px;
  }
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Delay helpers */
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }