/* Bio Farm TOYODA — Editorial Mincho (direction A)
   Mobile-first plain CSS. */

:root {
  --cream: #f7f5ee;
  --cream-deep: #efece0;
  --ink: #2c4a33;
  --ink-soft: #4c6350;
  --green-dark: #1e3325;
  --gold: #c0a35e;
  --red: #b43a2b;
  --line: rgba(44, 74, 51, 0.22);
  --serif-ja: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --serif-en: "Cormorant Garamond", Georgia, serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--serif-ja);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-weight: 600; }

.eyebrow {
  font-family: var(--serif-en);
  font-size: 0.75rem;
  letter-spacing: 0.42em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.placeholder-caption {
  font-family: var(--serif-en);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  opacity: 0.55;
}

.pc-only { display: none; }
@media (min-width: 720px) {
  .pc-only { display: inline; }
  .sp-only { display: none; }
}

/* ============ HEADER ============ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 1.1rem;
  background: rgba(247, 245, 238, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: auto;
}

.brand-text { line-height: 1.3; white-space: nowrap; }
.brand-ja { display: block; font-size: 1rem; letter-spacing: 0.14em; }
.brand-en {
  display: block;
  font-family: var(--serif-en);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

/* nav — hamburger on mobile */
.nav-toggle { display: none; }

.nav-toggle-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle-label span {
  display: block;
  height: 1px;
  background: var(--ink);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) { opacity: 0; }
.nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--cream);
  border-bottom: 1px solid var(--line);
  padding: 0.5rem 1.5rem 1.2rem;
}
.nav-toggle:checked ~ .site-nav { display: flex; }

.site-nav a {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
  letter-spacing: 0.22em;
}
.site-nav a:last-of-type { border-bottom: none; }

.lang {
  display: flex;
  gap: 1rem;
  padding-top: 0.9rem;
  font-family: var(--serif-en);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}
.lang-active { border-bottom: 1px solid var(--ink); }
.lang-soon { opacity: 0.38; cursor: default; }

@media (min-width: 900px) {
  .site-header { padding: 0.8rem 2.4rem; }
  .nav-toggle-label { display: none; }
  .site-nav {
    position: static;
    display: flex !important;
    flex-direction: row;
    align-items: center;
    gap: 2rem;
    background: none;
    border: none;
    padding: 0;
  }
  .site-nav a {
    padding: 0;
    border: none;
    font-size: 0.88rem;
  }
  .site-nav a:hover { color: var(--gold); }
  .lang { padding-top: 0; margin-left: 1.2rem; gap: 0.8rem; }
}

/* ============ HERO ============ */

.hero {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: var(--cream);
}

.hero-art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 4rem 1.4rem 4.2rem;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}

.hero-eyebrow {
  font-family: var(--serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.42em;
  opacity: 0.85;
  margin-bottom: 1.2rem;
}

.hero-title {
  font-size: clamp(2rem, 6.5vw, 3.6rem);
  line-height: 1.55;
  letter-spacing: 0.12em;
  font-weight: 600;
  text-shadow: 0 1px 14px rgba(20, 35, 25, 0.45);
}

.hero-sub {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(0.95rem, 2.2vw, 1.15rem);
  letter-spacing: 0.05em;
  margin-top: 1.3rem;
  opacity: 0.92;
}

.hero-tategaki {
  position: absolute;
  z-index: 2;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-size: 0.72rem;
  letter-spacing: 0.55em;
  opacity: 0.75;
  border-right: 1px solid rgba(247, 245, 238, 0.4);
  padding-right: 0.6rem;
}

.hero-caption {
  position: absolute;
  z-index: 2;
  left: 1.4rem;
  bottom: 0.9rem;
  color: var(--cream);
  opacity: 0.5;
}

@media (min-width: 900px) {
  .hero { min-height: 86vh; }
  .hero-inner { padding: 5rem 2.4rem 6rem; }
  .hero-tategaki { right: 2.2rem; }
  .hero-caption { left: 2.4rem; }
}

/* ============ PRINCIPLE ============ */

.principle {
  text-align: center;
  padding: 4.5rem 1.4rem 3.8rem;
  max-width: 760px;
  margin: 0 auto;
}

.principle-title {
  font-size: clamp(2.4rem, 8vw, 3.4rem);
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  margin: 1.6rem 0 1.8rem;
  font-weight: 500;
}

.principle-ja { letter-spacing: 0.1em; }

.principle-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-top: 1.1rem;
}

.rice-divider {
  width: 22px;
  height: 56px;
  margin-top: 2.4rem;
}

/* ============ PRODUCTS ============ */

.products {
  max-width: 1160px;
  margin: 0 auto;
  padding: 2.5rem 1.4rem 4.5rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.8rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  letter-spacing: 0.18em;
  font-weight: 600;
}

.section-head-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.4rem;
}

@media (min-width: 560px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem 1.6rem; }
}
@media (min-width: 980px) {
  .product-grid { grid-template-columns: repeat(4, 1fr); gap: 1.8rem; }
}

.product-art {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  margin-bottom: 1rem;
}
.product-art svg,
.product-art img { width: 100%; height: 100%; display: block; object-fit: cover; }
.product-art .placeholder-caption {
  position: absolute;
  left: 0.6rem;
  bottom: 0.45rem;
  color: #fff;
  opacity: 0.55;
}

.product-name { font-size: 1.15rem; letter-spacing: 0.14em; }

.product-name-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
}

.product-desc { font-size: 0.88rem; line-height: 1.85; }

.product-price {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  margin-top: 0.9rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
  font-family: var(--serif-en);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* ============ METHOD ============ */

.method {
  background: var(--cream-deep);
  text-align: center;
  padding: 4.5rem 1.4rem 4.8rem;
}

.method-title {
  font-size: clamp(1.5rem, 5vw, 2.3rem);
  letter-spacing: 0.16em;
  margin-top: 1.4rem;
  font-weight: 600;
}

.method-sub {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 0.7rem;
}

.method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.6rem;
  max-width: 1100px;
  margin: 3.2rem auto 0;
  text-align: left;
}

@media (min-width: 560px) {
  .method-grid { grid-template-columns: repeat(2, 1fr); gap: 2.6rem 2.2rem; }
}
@media (min-width: 980px) {
  .method-grid { grid-template-columns: repeat(4, 1fr); }
}

.method-num {
  font-size: 2.3rem;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.9rem;
  font-weight: 500;
}

.method-step h3 {
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  margin-bottom: 0.5rem;
}
.method-step h3 span {
  display: block;
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  margin-top: 0.15rem;
}

.method-step p:last-child { font-size: 0.86rem; line-height: 1.9; }

/* ============ LETTER ============ */

.letter {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4.5rem 1.4rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.4rem;
  align-items: center;
}

@media (min-width: 820px) {
  .letter { grid-template-columns: 5fr 7fr; gap: 3.6rem; }
}

.letter-portrait {
  position: relative;
  max-width: 400px;
}
.letter-portrait svg { width: 100%; height: auto; display: block; }
.letter-portrait .placeholder-caption {
  position: absolute;
  left: 0.6rem;
  bottom: 0.45rem;
  color: #fff;
  opacity: 0.5;
}

.letter-body h2 {
  font-size: clamp(1.5rem, 5vw, 2.1rem);
  letter-spacing: 0.12em;
  margin: 1.2rem 0 1.4rem;
  font-weight: 600;
}

.letter-body > p:not(.eyebrow) {
  font-size: 0.95rem;
  margin-bottom: 1.1rem;
}

.letter-sign {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  margin-top: 1.8rem;
}

.letter-sign-name { letter-spacing: 0.14em; }

.letter-seal {
  writing-mode: vertical-rl;
  font-size: 0.95rem;
  line-height: 1;
  color: var(--red);
  border: 1.5px solid var(--red);
  padding: 0.45rem 0.28rem;
  letter-spacing: 0.2em;
  border-radius: 2px;
}

/* ============ FOOTER ============ */

.site-footer {
  background: var(--green-dark);
  color: rgba(247, 245, 238, 0.88);
  padding: 3.4rem 1.4rem 1.6rem;
  font-size: 0.86rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.2rem;
}

@media (min-width: 820px) {
  .footer-inner { grid-template-columns: auto 1fr 1fr; gap: 3.5rem; }
}

.footer-logo {
  width: 130px;
  filter: brightness(0) invert(0.95) sepia(0.08);
  opacity: 0.85;
}

.footer-company {
  letter-spacing: 0.12em;
  margin-bottom: 0.5rem;
}
.footer-company span {
  display: block;
  font-family: var(--serif-en);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  opacity: 0.7;
}

.footer-info a:hover, .footer-contact a:hover { color: var(--gold); }

.footer-head {
  letter-spacing: 0.22em;
  border-bottom: 1px solid rgba(247, 245, 238, 0.3);
  padding-bottom: 0.4rem;
  margin-bottom: 0.7rem;
  display: inline-block;
}

.footer-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.78rem;
  opacity: 0.7;
}

.footer-copy {
  max-width: 1100px;
  margin: 2.8rem auto 0;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(247, 245, 238, 0.18);
  font-family: var(--serif-en);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  opacity: 0.6;
  text-align: center;
}