:root {
  --navy: #0b1c2c;
  --navy-deep: #07131e;
  --navy-mid: #143047;
  --ivory: #f7f4ef;
  --ivory-2: #efe8dc;
  --white: #ffffff;
  --ink: #1c1a17;
  --ink-soft: #4a453e;
  --red: #8b1e1e;
  --red-deep: #6e1616;
  --gold: #c4a35a;
  --gold-soft: #d4bf8a;
  --line: rgba(196, 163, 90, 0.35);
  --shadow: 0 18px 50px rgba(11, 28, 44, 0.12);
  --radius: 4px;
  --header-h: 92px;
  --font-serif: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --max: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.85;
  letter-spacing: 0.02em;
}

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

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

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: 1rem;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: 0.08em;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--gold);
  color: var(--navy);
  padding: 0.6rem 1rem;
  z-index: 1000;
}

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

.container {
  width: min(var(--max), calc(100% - 2.5rem));
  margin-inline: auto;
}

.section {
  padding: 5.5rem 0;
}

.section--navy {
  background: var(--navy);
  color: var(--ivory);
}

.section--ivory {
  background: var(--ivory);
}

.section--white {
  background: var(--white);
}

.kicker {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.28em;
  color: var(--gold);
  margin-bottom: 0.8rem;
}

.section--navy .kicker {
  color: var(--gold-soft);
}

.section-title {
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  margin-bottom: 0.4em;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 42em;
}

.section--navy .section-lead {
  color: rgba(247, 244, 239, 0.82);
}

.gold-rule {
  width: 64px;
  height: 1px;
  background: var(--gold);
  margin: 1.2rem 0 2rem;
  border: 0;
}

/* Header */
.topbar {
  background: var(--navy-deep);
  color: var(--ivory);
  font-size: 0.95rem;
  padding: 0.45rem 0;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar a {
  color: var(--gold-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 239, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1.5rem;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.logo-mark {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  letter-spacing: 0.18em;
  color: var(--navy);
}

.logo-en {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
}

.nav {
  display: flex;
  gap: 1.35rem;
  align-items: center;
}

.nav a {
  font-size: 0.98rem;
  letter-spacing: 0.08em;
  padding: 0.4rem 0;
  border-bottom: 1px solid transparent;
}

.nav a:hover,
.nav a[aria-current="page"] {
  border-bottom-color: var(--gold);
  color: var(--navy);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.cart-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--navy);
  color: var(--ivory);
  padding: 0.7rem 1.15rem;
  min-height: 48px;
  letter-spacing: 0.12em;
  border: 0;
  cursor: pointer;
}

.cart-count {
  background: var(--red);
  color: white;
  min-width: 1.5rem;
  height: 1.5rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
}

.menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--navy);
  color: var(--navy);
  min-width: 48px;
  min-height: 48px;
  cursor: pointer;
  font-size: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0.75rem 1.7rem;
  border: 1px solid transparent;
  letter-spacing: 0.14em;
  cursor: pointer;
  font-size: 1.05rem;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn--gold {
  background: var(--gold);
  color: var(--navy-deep);
}

.btn--gold:hover {
  background: var(--gold-soft);
}

.btn--navy {
  background: var(--navy);
  color: var(--ivory);
}

.btn--navy:hover {
  background: var(--navy-mid);
}

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

.btn--red:hover {
  background: var(--red-deep);
}

.btn--ghost {
  background: transparent;
  color: var(--ivory);
  border-color: rgba(247, 244, 239, 0.55);
}

.btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold-soft);
}

.btn--ghost-dark {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}

.btn--ghost-dark:hover {
  background: var(--navy);
  color: var(--ivory);
}

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

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  color: var(--ivory);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 19, 30, 0.82) 0%, rgba(7, 19, 30, 0.45) 55%, rgba(7, 19, 30, 0.28) 100%),
    radial-gradient(ellipse at 20% 80%, rgba(139, 30, 30, 0.18), transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 6rem 0 5rem;
  max-width: 38rem;
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  letter-spacing: 0.14em;
  line-height: 1.4;
}

.hero p {
  font-size: 1.15rem;
  color: rgba(247, 244, 239, 0.9);
}

.seigaiha {
  background-image: radial-gradient(circle at 50% 120%, transparent 36%, rgba(196, 163, 90, 0.09) 37%, rgba(196, 163, 90, 0.09) 42%, transparent 43%);
  background-size: 42px 24px;
}

/* Product cards */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}

.product-card {
  background: var(--white);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  border: 1px solid transparent;
}

.product-card:hover {
  border-color: var(--gold);
}

.product-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.product-card-body {
  padding: 1.4rem 1.35rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}

.product-card h3 {
  font-size: 1.25rem;
  margin: 0;
}

.product-meta {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.price {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: var(--navy);
  letter-spacing: 0.04em;
  margin: 0.4rem 0;
}

.price small {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-left: 0.35rem;
}

.product-card .btn {
  margin-top: auto;
}

/* Trust / features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.2rem;
}

.feature-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(196, 163, 90, 0.22);
  padding: 1.6rem 1.2rem;
  text-align: center;
}

.feature-num {
  color: var(--gold);
  font-family: var(--font-serif);
  letter-spacing: 0.2em;
  font-size: 0.85rem;
  display: block;
  margin-bottom: 0.6rem;
}

.feature-card h3 {
  font-size: 1.1rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: rgba(247, 244, 239, 0.78);
  margin: 0;
}

/* Process steps */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.8rem;
  counter-reset: step;
}

.step {
  text-align: center;
  padding: 1.4rem 0.8rem;
  position: relative;
}

.step::after {
  content: "→";
  position: absolute;
  right: -0.45rem;
  top: 1.7rem;
  color: var(--gold);
  font-size: 1.1rem;
}

.step:last-child::after {
  content: none;
}

.step-circle {
  width: 64px;
  height: 64px;
  margin: 0 auto 0.9rem;
  border: 1px solid var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  color: var(--navy);
  background: var(--white);
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
}

.how-card {
  background: var(--white);
  padding: 2rem 1.4rem;
  border-top: 3px solid var(--gold);
  box-shadow: var(--shadow);
}

.how-card .n {
  font-family: var(--font-serif);
  color: var(--gold);
  font-size: 1.6rem;
  letter-spacing: 0.12em;
}

/* Occasions */
.occasion-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.occasion {
  background: var(--navy);
  color: var(--ivory);
  min-height: 140px;
  display: flex;
  align-items: flex-end;
  padding: 1.4rem;
  background-size: cover;
  background-position: center;
  position: relative;
}

.occasion::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent, rgba(7, 19, 30, 0.82));
}

.occasion span {
  position: relative;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  letter-spacing: 0.14em;
}

/* Reviews */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.review {
  background: var(--white);
  padding: 1.8rem 1.5rem;
  border: 1px solid var(--ivory-2);
}

.review p {
  font-size: 1.02rem;
}

.review footer {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.review-note {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 1.2rem;
}

/* Delivery band */
.delivery-band {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.dl-grid {
  display: grid;
  gap: 0.9rem;
}

.dl-grid div {
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.75rem;
}

.dl-grid dt {
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.15rem;
}

.section--navy .dl-grid dt {
  color: var(--gold-soft);
}

.dl-grid dd {
  margin: 0;
}

/* FAQ */
.faq details {
  background: var(--white);
  border-bottom: 1px solid var(--ivory-2);
  padding: 0.2rem 0;
}

.faq summary {
  cursor: pointer;
  font-size: 1.08rem;
  padding: 1.15rem 0.4rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "＋";
  color: var(--gold);
  font-size: 1.2rem;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  padding: 0 0.4rem 1.2rem;
  color: var(--ink-soft);
}

/* Product detail */
.pdp {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: start;
  padding: 3rem 0 4rem;
}

.pdp-gallery img.main {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.thumbs {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.7rem;
}

.thumbs a,
.thumbs button {
  border: 1px solid transparent;
  padding: 0;
  background: none;
  cursor: pointer;
  display: block;
}

.thumbs a[aria-current="true"],
.thumbs button[aria-pressed="true"] {
  border-color: var(--gold);
}

.thumbs img {
  width: 92px;
  height: 72px;
  object-fit: cover;
}

.option-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin: 1rem 0 1.4rem;
}

.option {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid var(--ivory-2);
  padding: 0.85rem 1rem;
  cursor: pointer;
  background: var(--white);
}

.option:has(input:checked) {
  border-color: var(--gold);
  background: #fbf7ee;
}

.qty {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem 0 1.4rem;
}

.qty button {
  width: 48px;
  height: 48px;
  border: 1px solid var(--navy);
  background: var(--white);
  cursor: pointer;
  font-size: 1.3rem;
}

.qty input {
  width: 72px;
  height: 48px;
  text-align: center;
  border: 1px solid var(--ivory-2);
}

.info-blocks {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.info-blocks article {
  background: var(--ivory);
  padding: 1.2rem 1.3rem;
}

.cut-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.cut-card {
  background: var(--white);
  padding: 1.8rem 1.4rem;
  border-top: 3px solid var(--navy);
}

/* Cart / checkout */
.cart-layout,
.checkout-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 2.2rem;
  padding: 2.5rem 0 4rem;
}

.cart-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 1.1rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--ivory-2);
  align-items: center;
}

.cart-row img {
  width: 110px;
  height: 88px;
  object-fit: cover;
}

.summary {
  background: var(--white);
  padding: 1.8rem 1.5rem;
  border: 1px solid var(--ivory-2);
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}

.summary dl {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.55rem 1rem;
}

.summary dt,
.summary dd {
  margin: 0;
}

.summary .grand {
  font-size: 1.35rem;
  font-family: var(--font-serif);
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
  margin-top: 0.4rem;
}

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

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-weight: 500;
}

label.field input,
label.field select,
label.field textarea {
  min-height: 50px;
  padding: 0.6rem 0.8rem;
  border: 1px solid #d7cfc3;
  background: var(--white);
}

label.field textarea {
  min-height: 120px;
}

.pay-option {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  border: 1px solid var(--ivory-2);
  padding: 1rem;
  background: var(--white);
}

.pay-option:has(input:checked) {
  border-color: var(--gold);
}

.confirm {
  text-align: center;
  padding: 5rem 0 6rem;
}

.confirm h1 {
  font-size: 2rem;
}

/* Footer */
.footer {
  background: var(--navy-deep);
  color: rgba(247, 244, 239, 0.82);
  padding: 3.5rem 0 2rem;
  font-size: 0.98rem;
}

.footer a:hover {
  color: var(--gold-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer .logo-mark {
  color: var(--ivory);
}

.footer h3 {
  color: var(--gold-soft);
  font-size: 1rem;
  letter-spacing: 0.16em;
}

.footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer li {
  margin: 0.4rem 0;
}

.footer-bottom {
  border-top: 1px solid rgba(196, 163, 90, 0.2);
  padding-top: 1.2rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.page-hero {
  background: var(--navy);
  color: var(--ivory);
  padding: 3.5rem 0 2.8rem;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.notice {
  background: #f3eee4;
  border-left: 3px solid var(--gold);
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
  font-size: 0.98rem;
}

.sticky-cart {
  display: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.toast {
  position: fixed;
  bottom: 5.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy);
  color: var(--ivory);
  padding: 0.9rem 1.4rem;
  z-index: 80;
  letter-spacing: 0.08em;
}

@media (max-width: 980px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 72px;
  }

  .nav {
    display: none;
  }

  .nav-toggle:checked ~ .nav {
    display: flex;
    flex-direction: column;
    width: 100%;
    order: 3;
    background: var(--ivory);
    padding: 0.4rem 0 1rem;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .product-grid,
  .feature-grid,
  .steps,
  .how-grid,
  .occasion-grid,
  .review-grid,
  .cut-grid,
  .footer-grid,
  .pdp,
  .cart-layout,
  .checkout-layout,
  .delivery-band,
  .contact-grid,
  .form-row-2 {
    grid-template-columns: 1fr;
  }

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

  .step::after {
    display: none;
  }

  .hero {
    min-height: 78vh;
  }

  .pdp-gallery img.main {
    height: 280px;
  }

  .cart-row {
    grid-template-columns: 90px 1fr;
  }

  .sticky-cart {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 60;
    background: var(--navy);
    color: var(--ivory);
    padding: 0.7rem 1rem;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.2);
  }

  .sticky-cart .btn {
    min-height: 48px;
    flex: 1;
  }

  body:not(.no-sticky) {
    padding-bottom: 76px;
  }

  body.no-sticky .sticky-cart {
    display: none;
  }

  .product-card img {
    height: 200px;
  }
}

@media (max-width: 640px) {
  html,
  body {
    font-size: 17px;
  }

  .feature-grid,
  .how-grid,
  .steps,
  .occasion-grid {
    grid-template-columns: 1fr;
  }

  .container {
    width: min(var(--max), calc(100% - 1.6rem));
  }

  .section {
    padding: 3.4rem 0;
  }

  .btn {
    width: 100%;
  }

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

  .topbar {
    font-size: 0.88rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}