:root {
  --black: #000000;
  --white: #ffffff;
  --cream: #f5f1e8;
  --matcha: #8b9d83;
  --terracotta: #c17b5c;
  --sage: #a8b5a0;
  --ink-soft: rgba(0, 0, 0, 0.68);
  --line: rgba(0, 0, 0, 0.12);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--black);
  font-family: "Noto Serif JP", serif;
}

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

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  background: var(--black);
  color: var(--white);
  padding: 0.75rem 1rem;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid transparent;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.site-header.is-scrolled {
  border-color: var(--line);
}

.brand img,
.site-footer img {
  width: 74px;
  aspect-ratio: 1;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.nav a,
.footer-links a {
  transition: color 160ms ease;
}

.nav a:hover,
.footer-links a:hover {
  color: var(--black);
}

.header-cta {
  border: 1px solid var(--black);
  border-radius: 999px;
  padding: 0.7rem 1.1rem;
  font-size: 0.88rem;
  font-weight: 700;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1.08fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  min-height: calc(100vh - 96px);
  padding: clamp(2rem, 6vw, 5rem) clamp(1rem, 5vw, 4rem);
  background: var(--white);
}

.hero-copy,
.product-info,
.confidence-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--terracotta);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: "Noto Serif JP", serif;
  letter-spacing: 0;
  line-height: 0.95;
}

h1 {
  margin-bottom: 1.5rem;
  font-size: clamp(2.7rem, 6vw, 5.8rem);
}

h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(2.3rem, 5vw, 5.3rem);
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1rem;
}

.hero-text,
.lead,
.confidence-copy p,
.steps p,
.confidence-grid p,
.faq p,
.site-footer p,
.secure-note {
  color: var(--ink-soft);
  line-height: 1.7;
}

.hero-text,
.lead {
  max-width: 570px;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
}

.hero-actions,
.trust-row,
.price-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-actions {
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  padding: 0.95rem 1.35rem;
  font-weight: 800;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--black);
  color: var(--white);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.18);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.54);
}

.wide {
  width: 100%;
  margin-top: 1.3rem;
}

.trust-row {
  margin-top: 2rem;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.trust-row span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.8rem;
  background: rgba(255, 255, 255, 0.42);
}

.hero-media {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: var(--white);
}

.hero-media img {
  width: 100%;
  height: min(72vh, 720px);
  object-fit: cover;
}

.marquee {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line);
  background: var(--black);
  color: var(--white);
}

.marquee span {
  padding: 1rem;
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.product-section,
.split-section,
.confidence,
.faq,
.site-footer {
  padding: clamp(3.5rem, 7vw, 7rem) clamp(1rem, 5vw, 4rem);
}

.product-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(300px, 0.75fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  background: var(--white);
}

.product-gallery {
  display: grid;
  gap: 1rem;
}

.main-product,
.mini-gallery img,
.quote-band img {
  border-radius: 8px;
  background: var(--cream);
}

.main-product {
  width: 100%;
  max-height: 740px;
  object-fit: cover;
}

.mini-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.mini-gallery img {
  width: 100%;
  aspect-ratio: 1.25;
  object-fit: cover;
}

.product-info {
  position: sticky;
  top: 122px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(1.25rem, 3vw, 2rem);
  background: #fbfaf6;
}

.price-row {
  justify-content: space-between;
  margin: 1.6rem 0;
}

.price {
  font-family: "Noto Serif JP", serif;
  font-size: 2.3rem;
  font-weight: 700;
}

.stock {
  border-radius: 999px;
  padding: 0.5rem 0.75rem;
  background: rgba(139, 157, 131, 0.18);
  color: #42543d;
  font-size: 0.82rem;
  font-weight: 800;
}

.check-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.55rem;
  color: var(--ink-soft);
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.12rem;
  content: "";
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--matcha);
}

.secure-note {
  margin: 1rem 0 0;
  font-size: 0.88rem;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(300px, 1.2fr);
  gap: clamp(2rem, 5vw, 4rem);
  background: var(--cream);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.steps article,
.confidence-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.52);
}

.steps span {
  display: inline-flex;
  margin-bottom: 1.6rem;
  color: var(--terracotta);
  font-family: "Noto Serif JP", serif;
  font-size: 1.8rem;
}

.confidence {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(300px, 1.1fr);
  gap: clamp(2rem, 5vw, 4rem);
  background: #e8eee4;
}

.confidence-grid {
  display: grid;
  gap: 1rem;
}

.confidence-grid article {
  background: rgba(255, 255, 255, 0.46);
}

.quote-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(300px, 1fr);
  align-items: stretch;
  background: var(--black);
  color: var(--white);
}

.quote-band img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  border-radius: 0;
}

.quote-band div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vw, 5rem);
}

.quote-band p {
  max-width: 760px;
  font-family: "Noto Serif JP", serif;
  font-size: clamp(2.5rem, 6vw, 6rem);
  line-height: 0.98;
}

.quote-band span {
  color: rgba(255, 255, 255, 0.64);
}

.faq {
  max-width: 980px;
  margin: 0 auto;
}

.faq details {
  border-top: 1px solid var(--line);
  padding: 1.25rem 0;
}

.faq details:last-child {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 800;
}

.faq p {
  max-width: 700px;
  margin: 0.9rem 0 0;
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.site-footer p {
  margin: 1rem 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1rem;
  color: var(--ink-soft);
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero,
  .product-section,
  .split-section,
  .confidence,
  .quote-band {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 2rem;
  }

  .hero-media img {
    height: auto;
  }

  .marquee {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-info {
    position: static;
  }

  .steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 0.75rem 1rem;
  }

  .brand img {
    width: 58px;
  }

  .header-cta {
    padding: 0.62rem 0.9rem;
  }

  h1 {
    font-size: 3.35rem;
  }

  .hero-actions .button,
  .wide {
    width: 100%;
  }

  .marquee {
    grid-template-columns: 1fr;
  }

  .mini-gallery {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }
}