/* Koan - Japanese Zen theme: wabi-sabi, enso, negative space */
:root {
  --sand: #e6ddc9;
  --sand-soft: #f2ecdc;
  --paper: #faf6ec;
  --ink: #232018;
  --ink-soft: #56503f;
  --moss: #6b7355;
  --moss-soft: #a1a888;
  --clay: #b5714b;
  --line: #d5cbb1;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  font-weight: 400;
}
h1, h2, h3, .serif {
  font-family: 'Noto Serif JP', 'Noto Serif', Georgia, serif;
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.35;
  color: var(--ink);
}
h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.15rem; }
a { color: var(--moss); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--clay); }
img { max-width: 100%; display: block; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 32px; }

/* Header */
header.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(6px);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding: 22px 32px; max-width: 1140px; margin: 0 auto;
}
.brand {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.35rem; letter-spacing: 0.08em;
  display: flex; align-items: center; gap: 12px;
  color: var(--ink);
}
.brand-mark {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1.5px solid var(--ink);
  display: grid; place-items: center;
  font-size: 0.9rem; font-family: 'Noto Serif JP', serif;
  color: var(--ink);
}
nav.main-nav { display: flex; gap: 30px; align-items: center; flex-wrap: wrap; }
nav.main-nav a {
  color: var(--ink-soft); font-size: 0.9rem;
  letter-spacing: 0.05em;
}
nav.main-nav a:hover { color: var(--clay); text-decoration: none; }
.header-tools { display: flex; align-items: center; gap: 20px; }
.lang-switch { display: flex; gap: 14px; }
.lang-switch button {
  background: transparent; border: 0; padding: 4px 0; cursor: pointer;
  font-family: inherit; font-weight: 500; font-size: 0.85rem;
  letter-spacing: 0.1em; color: var(--ink-soft);
  border-bottom: 1px solid transparent;
}
.lang-switch button.active {
  color: var(--ink);
  border-bottom-color: var(--clay);
}
.cart-btn {
  color: var(--ink-soft); font-size: 0.9rem;
  display: inline-flex; gap: 8px; align-items: center;
  letter-spacing: 0.05em;
}
.cart-btn:hover { color: var(--clay); }
.cart-count {
  color: var(--clay); font-size: 0.85rem;
}

/* Buttons */
.btn {
  display: inline-block; padding: 14px 32px;
  font-weight: 500; font-size: 0.9rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer; border: 1px solid var(--ink);
  background: transparent; color: var(--ink);
  font-family: inherit; transition: all 0.4s ease;
}
.btn:hover {
  background: var(--ink); color: var(--paper);
  text-decoration: none;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--clay); border-color: var(--clay); color: var(--paper); }
.btn-outline { background: transparent; color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: var(--paper); }
.btn-block { display: block; width: 100%; text-align: center; }

/* Hero */
.hero {
  padding: 100px 0 90px;
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center;
}
.hero-eyebrow {
  display: inline-block; font-size: 0.78rem;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--moss); margin-bottom: 26px;
}
.hero h1 { margin-bottom: 24px; }
.hero p.lead {
  font-size: 1.05rem; color: var(--ink-soft);
  margin: 0 0 40px; max-width: 480px; line-height: 1.85;
}
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; }
.hero-image { position: relative; padding: 12px; }
.hero-image img { border-radius: 2px; }

/* Enso mark */
.enso {
  position: absolute; top: -20px; left: -20px;
  width: 80px; height: 80px;
  border: 2px solid var(--clay);
  border-radius: 50%;
  border-right-color: transparent;
  transform: rotate(-30deg);
  opacity: 0.5;
  pointer-events: none;
}

/* Badges strip */
.badges {
  display: flex; gap: 48px; flex-wrap: wrap;
  padding: 34px 0; border-bottom: 1px solid var(--line);
  justify-content: center;
}
.badge {
  font-size: 0.78rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--ink-soft);
}
.badge::before {
  content: "◦"; color: var(--clay);
  margin-right: 10px; font-size: 1.1rem;
  vertical-align: middle;
}

/* Sections */
section { padding: 90px 0; }
.section-title { margin-bottom: 16px; }
.section-sub {
  color: var(--ink-soft); max-width: 560px;
  margin-bottom: 56px; font-size: 1rem; line-height: 1.85;
}

/* Cards */
.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
}
.card {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.card h3 { margin-bottom: 12px; }
.card p { color: var(--ink-soft); font-size: 0.95rem; line-height: 1.8; }

/* Product grid */
.product-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 50px;
}
.product-card {
  display: flex; flex-direction: column;
  background: var(--sand-soft);
  padding: 24px;
  transition: box-shadow 0.4s ease;
}
.product-card:hover { box-shadow: 0 8px 40px rgba(35, 32, 24, 0.06); }
.product-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; margin-bottom: 22px; }
.product-card h3 { margin-bottom: 8px; font-size: 1.05rem; }
.product-card .price {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.4rem; color: var(--clay); margin: 10px 0 22px;
  letter-spacing: 0.02em;
}

/* Product detail */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: start; }
.product-detail img { border-radius: 2px; background: var(--sand-soft); padding: 24px; }
.pd-price {
  font-family: 'Noto Serif JP', serif;
  font-size: 2rem; color: var(--clay); margin: 16px 0 28px;
}
.pd-block { margin-top: 36px; padding-top: 28px; border-top: 1px solid var(--line); }
.pd-block h3 {
  margin-bottom: 14px; color: var(--moss);
  font-size: 0.85rem; letter-spacing: 0.2em; text-transform: uppercase;
  font-family: 'Inter', sans-serif;
}
.pd-block ul { padding-left: 22px; color: var(--ink-soft); }
.pd-block li { margin-bottom: 8px; }
.pd-block p { color: var(--ink-soft); }

/* Forms */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.form-grid .full { grid-column: 1 / -1; }
label {
  display: block; margin-bottom: 8px;
  font-size: 0.78rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft);
}
input, textarea, select {
  width: 100%; padding: 14px 4px;
  border: 0; border-bottom: 1px solid var(--line);
  background: transparent; font-family: inherit; font-size: 1rem;
  color: var(--ink); border-radius: 0;
  transition: border-color 0.3s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none; border-bottom-color: var(--clay);
}
textarea { resize: vertical; min-height: 120px; }

/* Cart */
.cart-item {
  display: grid; grid-template-columns: 110px 1fr auto; gap: 30px;
  align-items: center; padding: 32px 0; border-bottom: 1px solid var(--line);
}
.cart-item img { background: var(--sand-soft); padding: 8px; }
.cart-item h3 { font-size: 1.05rem; margin-bottom: 6px; }
.qty {
  display: inline-flex; align-items: center; gap: 16px;
  margin-top: 14px;
}
.qty button {
  width: 28px; height: 28px; border: 1px solid var(--line);
  background: transparent; cursor: pointer;
  font-family: inherit; font-size: 0.9rem; color: var(--ink);
  transition: all 0.3s;
}
.qty button:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.qty span { font-family: 'Noto Serif JP', serif; }
.cart-total {
  text-align: right; margin-top: 40px; padding-top: 30px;
  border-top: 1px solid var(--ink);
}
.cart-total .sum {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.9rem; color: var(--clay);
}

/* FAQ */
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%; text-align: left; background: transparent; border: 0;
  padding: 28px 0; font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem; color: var(--ink); cursor: pointer;
  display: flex; justify-content: space-between;
  align-items: center; gap: 24px; letter-spacing: 0.01em;
}
.faq-q::after {
  content: "＋"; font-size: 1.2rem; color: var(--clay);
  font-family: 'Inter', sans-serif; font-weight: 300;
  transition: transform 0.4s ease;
}
.faq-item.open .faq-q::after { content: "−"; }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease;
  color: var(--ink-soft);
}
.faq-item.open .faq-a { max-height: 500px; padding-bottom: 28px; }

/* Legal */
.legal { max-width: 760px; margin: 0 auto; }
.legal h2 {
  margin: 44px 0 16px; font-size: 1.15rem;
  color: var(--moss);
}
.legal h2:first-of-type { margin-top: 24px; }
.legal p, .legal li { color: var(--ink-soft); margin-bottom: 12px; line-height: 1.85; }
.legal ol, .legal ul { padding-left: 24px; }

/* Reviews */
.review {
  padding: 36px 0; border-top: 1px solid var(--line);
}
.review .who {
  margin-top: 20px; font-size: 0.82rem;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--ink-soft);
}
.review .stars {
  color: var(--clay); letter-spacing: 6px; margin-bottom: 16px;
  font-size: 0.85rem;
}
.review p {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem; color: var(--ink); line-height: 1.75;
}

/* Footer */
footer.site-footer {
  background: var(--sand-soft);
  border-top: 1px solid var(--line);
  padding: 80px 0 30px; margin-top: 60px;
}
footer.site-footer h4 {
  font-family: 'Inter', sans-serif;
  font-weight: 500; color: var(--ink-soft);
  margin-bottom: 20px; font-size: 0.78rem;
  text-transform: uppercase; letter-spacing: 0.22em;
}
footer.site-footer a {
  color: var(--ink-soft); font-size: 0.9rem;
  line-height: 2.1;
}
footer.site-footer a:hover { color: var(--clay); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 50px; }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 2px; }
.footer-brand .brand { color: var(--ink); margin-bottom: 18px; }
.footer-brand p { color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 18px; line-height: 1.8; }
.certs { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.cert {
  border: 1px solid var(--line); padding: 5px 12px;
  font-size: 0.7rem; letter-spacing: 0.15em;
  color: var(--ink-soft); text-transform: uppercase;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 56px; padding-top: 26px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px;
  font-size: 0.78rem; color: var(--ink-soft);
  letter-spacing: 0.08em;
}

/* Thx */
.thx-wrap { text-align: center; padding: 120px 0; }
.thx-icon {
  width: 90px; height: 90px; border-radius: 50%;
  border: 1.5px solid var(--clay); color: var(--clay);
  font-size: 2.2rem; display: grid; place-items: center;
  margin: 0 auto 34px;
  font-family: 'Noto Serif JP', serif;
}

/* Banners */
.info-banner {
  background: var(--sand-soft); border-left: 3px solid var(--clay);
  padding: 20px 26px; margin: 30px 0;
  color: var(--ink-soft); font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 860px) {
  .hero-grid, .product-detail, .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  nav.main-nav { display: none; }
  .hero { padding: 60px 0; }
  section { padding: 60px 0; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .cart-item { grid-template-columns: 80px 1fr; }
  .cart-item .ci-total { grid-column: 2; text-align: left; }
  .container { padding: 0 22px; }
}