/* COOTTRO — 枯山水: white ground, the brand's red disc as a stone in raked sand.
   Mincho headlines over gothic text, latin labels as quiet captions.
   Single light look, chosen to match the logo. */
:root {
  --paper: #FFFFFF;
  --paper-2: #F6F3F2;
  --ink: #17151A;
  --ink-2: #5A5560;
  --line: #E3DDDB;
  --shu: #D5141B;
  --shu-deep: #A90F15;
  --shu-tint: #FBEAEA;
  --on-shu: #FFFFFF;
  --night: #17151A;
  --night-ink: #F4F2F0;
  --night-mute: #9C97A1;
  --night-line: #34303A;
  --scrim: rgba(23, 21, 26, .55);
  --font-mincho: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  --font-gothic: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  --font-latin: "Jost", "Futura", "Century Gothic", "Zen Kaku Gothic New", sans-serif;
  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-gothic);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html[lang="en"] body { font-family: var(--font-latin); font-size: 17px; line-height: 1.65; }
img { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--shu); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

/* ---------- type ---------- */
.label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-latin); font-weight: 500;
  font-size: 12px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--ink-2); line-height: 1.4;
}
.label::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--shu); flex: none; }
html[lang="en"] .label { font-family: var(--font-gothic); letter-spacing: .2em; }
.h-display, .h-page, .h-section, h3, .dlg-title {
  font-family: var(--font-mincho); font-weight: 600; margin: 0;
  font-feature-settings: "palt"; text-wrap: balance; word-break: auto-phrase;
}
.h-section { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.6rem); line-height: 1.4; letter-spacing: .04em; }
.h-page { font-size: clamp(2.2rem, 1.4rem + 3vw, 3.6rem); line-height: 1.3; letter-spacing: .06em; }
html[lang="en"] .h-section, html[lang="en"] .h-page { letter-spacing: 0; line-height: 1.15; }
.lead { color: var(--ink-2); max-width: 38em; margin: 0; }
html[lang="en"] .lead { max-width: 34em; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(1.2) blur(8px); -webkit-backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; gap: 28px; min-height: 72px; }
.brand-link { flex: none; display: block; }
.brand-link img { height: 38px; width: auto; }
.main-nav { display: flex; gap: 26px; margin-left: auto; }
.main-nav a, .mobile-nav a { text-decoration: none; font-size: 14px; font-weight: 500; letter-spacing: .06em; color: var(--ink); }
.main-nav a { position: relative; padding-block: 6px; }
.main-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--shu);
  transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { transform: scaleX(1); }
.header-tools { display: flex; align-items: center; gap: 14px; }
.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 2px; overflow: hidden; }
.lang-switch a {
  font: 500 12px/1 var(--font-latin); letter-spacing: .08em; padding: 9px 12px; text-decoration: none;
  background: var(--paper); color: var(--ink-2);
}
.lang-switch a[aria-current="true"] { background: var(--ink); color: var(--paper); }
.menu-btn {
  display: none; font: 500 13px/1 var(--font-gothic); letter-spacing: .08em;
  background: var(--paper); color: var(--ink); border: 1px solid var(--ink); padding: 10px 14px; cursor: pointer;
}
.mobile-nav { border-top: 1px solid var(--line); background: var(--paper); }
.mobile-nav ul { list-style: none; margin: 0; padding-block: 8px 16px; display: grid; }
.mobile-nav a { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 14px;
  font: 500 15px/1 var(--font-gothic); letter-spacing: .06em; text-decoration: none; cursor: pointer;
  padding: 17px 26px; border: 1px solid transparent; border-radius: 2px;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
html[lang="en"] .btn { font-family: var(--font-latin); letter-spacing: .03em; }
.btn::after { content: ""; width: 22px; height: 1px; background: currentColor; transition: width .2s ease; }
.btn:hover::after { width: 30px; }
.btn--primary { background: var(--shu); color: var(--on-shu); }
.btn--primary:hover { background: var(--shu-deep); }
.btn--ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--small { padding: 12px 18px; font-size: 13px; }
.btn--small::after { width: 14px; }
.btn--light { background: var(--on-shu); color: var(--shu); }
.btn--light:hover { background: var(--ink); color: var(--on-shu); }
.text-link { display: inline-flex; align-items: center; gap: 10px; font-weight: 500; text-decoration: none; border-bottom: 1px solid var(--ink); padding-bottom: 2px; }
.text-link:hover { color: var(--shu); border-color: var(--shu); }

/* ---------- hero (home) ---------- */
.hero { padding-block: clamp(40px, 7vw, 104px) clamp(48px, 7vw, 96px); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(24px, 4vw, 64px); align-items: center; }
.hero-copy { display: grid; gap: 28px; min-width: 0; }
.h-display { font-size: clamp(2.6rem, 1.4rem + 4.6vw, 5.2rem); line-height: 1.22; letter-spacing: .06em; }
html[lang="en"] .h-display { letter-spacing: -.005em; line-height: 1.06; }
.h-display em { font-style: normal; color: var(--shu); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { font-size: 13px; color: var(--ink-2); margin: 0; letter-spacing: .04em; }
.hero-art-wrap { position: relative; min-width: 0; }
.hero-art { width: 100%; max-width: 100%; aspect-ratio: 1; display: block; }
.hero-art .rake-line, .hero-art .ring { stroke: var(--line); stroke-width: 1.4; fill: none; }
.hero-art .stone { fill: var(--shu); }
.hero-art .pebble { fill: var(--ink); }
.hero-art .ripple { stroke: var(--shu); stroke-width: 1.6; fill: none; opacity: 0; transform-box: fill-box; transform-origin: center; }
@media (prefers-reduced-motion: no-preference) {
  .hero-art .ripple { animation: ripple 7.5s cubic-bezier(.2, .6, .3, 1) infinite; }
  .hero-art .ripple:nth-of-type(2) { animation-delay: 2.5s; }
  .hero-art .ripple:nth-of-type(3) { animation-delay: 5s; }
}
@keyframes ripple { 0% { transform: scale(1); opacity: .55; } 100% { transform: scale(1.75); opacity: 0; } }
.tategaki {
  position: absolute; top: 4%; right: 0; margin: 0;
  writing-mode: vertical-rl; font-family: var(--font-mincho); font-weight: 500;
  font-size: 14px; letter-spacing: .5em; color: var(--ink-2);
}

/* ---------- page hero (inner pages) ---------- */
.page-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.page-hero .wrap { position: relative; z-index: 1; display: grid; gap: 22px; padding-block: clamp(48px, 7vw, 96px); }
.page-hero::after {
  content: ""; position: absolute; top: 50%; right: -120px; width: 520px; height: 520px; transform: translateY(-50%);
  background:
    radial-gradient(circle at 50% 50%, var(--shu) 0 92px, transparent 93px),
    repeating-radial-gradient(circle at 50% 50%, transparent 0 106px, var(--line) 106px 107.5px, transparent 107.5px 119px);
  -webkit-mask: radial-gradient(circle at 50% 50%, #000 0 52%, transparent 70%);
  mask: radial-gradient(circle at 50% 50%, #000 0 52%, transparent 70%);
  pointer-events: none;
}
.page-hero .lead { max-width: 34em; }

/* ---------- sections ---------- */
.section { padding-block: clamp(64px, 9vw, 128px); scroll-margin-top: 72px; }
.section--tight { padding-block: clamp(48px, 6vw, 88px); }
.section--tint { background: var(--paper-2); }
.section-head { display: grid; gap: 18px; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head--split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: end; column-gap: 48px; }
.section-head--split .lead { justify-self: end; }
.stack { display: grid; gap: 18px; min-width: 0; }

/* ---------- brand (home) ---------- */
.brand-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.brand-body { display: grid; gap: 1.2em; min-width: 0; }
.brand-body p { margin: 0; max-width: 34em; }
.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); margin-top: 12px; }
.fact { padding: 18px 16px 0 0; display: grid; gap: 4px; min-width: 0; }
.fact + .fact { padding-left: 16px; border-left: 1px solid var(--line); }
.fact-num { font: 300 clamp(2.2rem, 1.6rem + 2vw, 3.2rem)/1 var(--font-latin); color: var(--shu); font-variant-numeric: tabular-nums; }
.fact-label { font-size: 13px; color: var(--ink-2); line-height: 1.5; }

/* ---------- category tiles (home) ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tile { background: var(--paper); padding: clamp(22px, 2.4vw, 32px); display: flex; flex-direction: column; gap: 14px; min-width: 0; text-decoration: none; color: var(--ink); transition: background-color .2s ease; }
.tile:hover { background: var(--paper-2); }
.tile-mark { font: 300 clamp(1.9rem, 1.4rem + 1.4vw, 2.6rem)/1 var(--font-latin); color: var(--shu); letter-spacing: .02em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tile h3 { font-size: 1.28rem; line-height: 1.45; letter-spacing: .04em; }
html[lang="en"] .tile h3 { letter-spacing: 0; line-height: 1.25; }
.sub { font: 500 11px/1.4 var(--font-latin); letter-spacing: .18em; text-transform: uppercase; color: var(--ink-2); }
html[lang="en"] .sub { font-family: var(--font-gothic); letter-spacing: .12em; }
.tile .sub { margin-top: -8px; }
.tile p { margin: 0; font-size: 14.5px; color: var(--ink-2); line-height: 1.8; }
html[lang="en"] .tile p { font-size: 15px; line-height: 1.6; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0; }
.tile .tags { margin-top: auto; padding-top: 6px; }
.tags li { font: 400 12px/1 var(--font-latin); letter-spacing: .04em; padding: 6px 10px; border: 1px solid var(--line); background: var(--paper); font-variant-numeric: tabular-nums; }
.tile-foot { display: flex; justify-content: space-between; align-items: center; font: 500 12px/1 var(--font-latin); letter-spacing: .08em; color: var(--ink-2); padding-top: 4px; }
.tile-foot span:last-child { color: var(--shu); transition: transform .2s ease; }
.tile:hover .tile-foot span:last-child { transform: translateX(4px); }
.tile--wide { grid-column: span 2; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 14px 28px; align-content: start; }
.tile--wide .tile-mark { font-size: clamp(3rem, 2rem + 3.4vw, 5rem); }
.tile--wide .tile-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.tile--wide .tile-foot { grid-column: 1 / -1; }
.more-row { margin-top: 28px; display: flex; justify-content: flex-end; }

/* ---------- why (home) ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(28px, 3vw, 40px); }
.why-item { display: grid; gap: 14px; align-content: start; min-width: 0; padding-top: 22px; border-top: 1px solid var(--ink); }
.kanji-row { display: flex; align-items: baseline; gap: 12px; }
.kanji { font: 600 3.4rem/1 var(--font-mincho); color: var(--shu); }
.romaji { font: 500 11px/1 var(--font-latin); letter-spacing: .22em; color: var(--ink-2); }
.why-item h3 { font-size: 1.2rem; line-height: 1.5; }
.why-item p { margin: 0; font-size: 14.5px; color: var(--ink-2); line-height: 1.85; }
html[lang="en"] .why-item p { font-size: 15px; line-height: 1.6; }

/* ---------- markets (home) ---------- */
.market-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.market { padding: 28px 24px 32px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.market + .market { border-left: 1px solid var(--line); }
.market:first-child { padding-left: 0; }
.market h3 { font-size: 1.7rem; line-height: 1.3; letter-spacing: .06em; }
html[lang="en"] .market h3 { font-size: 1.5rem; letter-spacing: 0; }
.market p { margin: 0; font-size: 14.5px; color: var(--ink-2); line-height: 1.8; }
.market-key { justify-self: start; font-size: 12px; font-weight: 500; color: var(--shu); border: 1px solid currentColor; padding: 4px 10px; letter-spacing: .06em; line-height: 1.4; }

/* ---------- partner band ---------- */
.partner { background: var(--shu); color: var(--on-shu); position: relative; overflow: hidden; scroll-margin-top: 72px; }
.partner::before, .partner::after {
  content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .28); pointer-events: none;
  width: 520px; height: 520px; right: -140px; top: 50%; transform: translateY(-50%);
}
.partner::after { width: 360px; height: 360px; right: -60px; border-color: rgba(255, 255, 255, .4); }
.partner-row { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 24px 64px; align-items: end; padding-block: clamp(56px, 8vw, 104px); }
.partner .label { color: var(--on-shu); }
.partner .label::before { background: var(--on-shu); }
.partner .h-section { margin-top: 16px; }
.partner-side { display: grid; gap: 24px; justify-items: start; }
.partner-side p { margin: 0; max-width: 30em; }

/* ---------- grade guide (products) ---------- */
.grade-guide { display: grid; gap: 14px; }
.grade-row { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 16px; align-items: stretch; }
.grade-row-label { font-family: var(--font-mincho); font-weight: 600; font-size: 1.1rem; align-self: center; }
html[lang="en"] .grade-row-label { font-size: 1.05rem; }
.grade-steps { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 6px; }
.grade-step { padding: 18px 20px; border: 1px solid var(--shu); display: grid; gap: 6px; min-width: 0; background: var(--paper); }
.grade-step b { font: 400 2rem/1 var(--font-latin); letter-spacing: .02em; }
.grade-step span { font-size: 13px; line-height: 1.5; }
.grade-step small { font: 400 12px/1.4 var(--font-latin); letter-spacing: .04em; color: var(--ink-2); }
.grade-step--1 { background: var(--shu); color: var(--on-shu); }
.grade-step--1 small { color: var(--on-shu); opacity: .85; }
.grade-step--2 { background: var(--shu-tint); }
.grade-step--3 { border-color: var(--line); }
.grade-scale { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 16px; }
.grade-scale-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; font: 500 11px/1 var(--font-latin); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-2); }
.grade-scale-bar::before { content: ""; order: 1; flex: 1; height: 1px; background: linear-gradient(90deg, var(--shu), var(--line)); }
.grade-scale-bar span:last-child { order: 2; }

/* ---------- core products ---------- */
.core-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.core-card { display: grid; grid-template-columns: minmax(0, 120px) minmax(0, 1fr); gap: 20px; align-items: center; padding: 20px; border: 1px solid var(--line); background: var(--paper); min-width: 0; position: relative; }
.core-card img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: contain; background: var(--paper-2); }
.core-card .stack { gap: 6px; }
.core-grade { font: 300 2.3rem/1 var(--font-latin); color: var(--shu); font-variant-numeric: tabular-nums; }
.core-meta { font-size: 13px; color: var(--ink-2); line-height: 1.6; }

/* ---------- filter + catalog ---------- */
.filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: clamp(32px, 4vw, 48px); }
.filter button {
  font: 500 13px/1 var(--font-gothic); letter-spacing: .04em; padding: 11px 16px; cursor: pointer;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: 999px;
  display: inline-flex; gap: 8px; align-items: center;
}
html[lang="en"] .filter button { font-family: var(--font-latin); }
.filter button span { font: 400 11px/1 var(--font-latin); color: var(--ink-2); font-variant-numeric: tabular-nums; }
.filter button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.filter button[aria-pressed="true"] span { color: var(--paper); opacity: .7; }
.cat-block { display: grid; gap: 24px; scroll-margin-top: 88px; }
.cat-block + .cat-block { margin-top: clamp(48px, 6vw, 80px); }
.cat-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px 40px; align-items: end; padding-bottom: 18px; border-bottom: 1px solid var(--ink); }
.cat-head h2 { font-family: var(--font-mincho); font-weight: 600; font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem); margin: 0; line-height: 1.35; font-feature-settings: "palt"; }
.cat-head p { margin: 0; font-size: 14.5px; color: var(--ink-2); line-height: 1.75; justify-self: end; max-width: 30em; }
.card-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.card { position: relative; display: flex; flex-direction: column; min-width: 0; border: 1px solid var(--line); background: var(--paper); transition: border-color .2s ease; }
.card:hover { border-color: var(--ink); }
.card-img { background: var(--paper-2); aspect-ratio: 4 / 5; display: grid; place-items: center; overflow: hidden; }
.card-img img { width: 100%; height: 100%; object-fit: contain; transition: transform .35s ease; }
.card:hover .card-img img { transform: scale(1.03); }
@media (prefers-reduced-motion: reduce) { .card:hover .card-img img, .card-img img { transform: none; transition: none; } }
.card-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.code { font: 500 11px/1 var(--font-latin); letter-spacing: .14em; color: var(--ink-2); }
.badge { font: 500 11px/1 var(--font-gothic); letter-spacing: .08em; color: var(--on-shu); background: var(--shu); padding: 5px 8px; }
.card-grade { font: 300 1.9rem/1.05 var(--font-latin); color: var(--shu); font-variant-numeric: tabular-nums; }
.card-grade--word { font-family: var(--font-mincho); font-weight: 600; font-size: 1.2rem; line-height: 1.4; color: var(--ink); }
html[lang="en"] .card-grade--word { font-family: var(--font-latin); font-weight: 500; font-size: 1.25rem; }
.card-series { font: 500 13px/1.4 var(--font-latin); letter-spacing: .06em; }
.card-meta { font-size: 13px; color: var(--ink-2); line-height: 1.6; margin: 0; }
.card-description { font-size: 1rem; line-height: 1.65; margin: 4px 0; color: var(--ink-2); }
#care .card-img { position: relative; min-width: 0; }
#care .card-img img { position: absolute; inset: 0; }
.image-pending { padding: 24px; margin: 0; text-align: center; font-size: 1.1rem; line-height: 1.6; }
.image-pending span { display: block; font-size: .875rem; margin-top: 16px; color: var(--ink-2); }
.dlg-details h3 { font-size: 1.1rem; margin-bottom: 8px; }
.dlg-details p, .dlg-details ul { font-size: 1rem; line-height: 1.7; margin: 0; }
.dlg-details ul { padding-left: 20px; }
.card .tags { margin-top: auto; padding-top: 8px; }
.card-open { font: 500 13px/1 var(--font-gothic); background: none; border: 0; padding: 12px 0 0; margin-top: 4px; color: var(--ink); cursor: pointer; text-align: left; display: inline-flex; gap: 10px; align-items: center; border-top: 1px solid var(--line); }
html[lang="en"] .card-open { font-family: var(--font-latin); }
.card-open::before { content: ""; position: absolute; inset: 0; }
.card-open::after { content: ""; width: 16px; height: 1px; background: var(--shu); transition: width .2s ease; }
.card:hover .card-open::after { width: 24px; }
.manual-note { margin-top: clamp(48px, 6vw, 72px); padding: 20px 24px; background: var(--paper-2); font-size: 14px; color: var(--ink-2); line-height: 1.8; border-left: 3px solid var(--shu); }

/* ---------- product dialog ---------- */
.product-dialog {
  width: min(960px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); padding: 0; border: 0;
  background: var(--paper); color: var(--ink); overflow: auto;
}
.product-dialog::backdrop { background: var(--scrim); }
.dlg-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.dlg-gallery { background: var(--paper-2); padding: 24px; display: grid; gap: 14px; align-content: start; min-width: 0; }
.dlg-main { aspect-ratio: 4 / 5; width: 100%; min-width: 0; position: relative; overflow: hidden; }
.dlg-main img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.dlg-thumbs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.dlg-thumbs button { border: 1px solid var(--line); background: var(--paper); padding: 6px 6px 8px; cursor: pointer; display: grid; gap: 4px; font: 500 12px/1.2 var(--font-gothic); color: var(--ink-2); }
.dlg-thumbs button[aria-pressed="true"] { border-color: var(--ink); color: var(--ink); }
.dlg-thumbs img { aspect-ratio: 4 / 5; width: 100%; object-fit: contain; }
.dlg-sample { font: 400 .875rem/1.5 var(--font-latin); color: var(--ink-2); margin: 0; }
.dlg-info { padding: 32px; display: grid; gap: 16px; align-content: start; min-width: 0; position: relative; }
.dlg-close { position: absolute; z-index: 2; top: 12px; right: 12px; width: 40px; height: 40px; border: 1px solid var(--line); background: var(--paper); cursor: pointer; font-size: 20px; line-height: 1; color: var(--ink); }
.dlg-close:hover { border-color: var(--ink); }
.dlg-title { font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.2rem); line-height: 1.2; padding-right: 48px; word-break: normal; overflow-wrap: anywhere; }
.dlg-grade { font: 300 2.6rem/1 var(--font-latin); color: var(--shu); font-variant-numeric: tabular-nums; }
.dlg-grade--word { font-family: var(--font-mincho); font-weight: 600; font-size: 1.5rem; color: var(--ink); }
html[lang="en"] .dlg-grade--word { font-family: var(--font-latin); font-weight: 500; }
.spec-list { margin: 0; display: grid; grid-template-columns: max-content minmax(0, 1fr); border-top: 1px solid var(--line); }
.spec-list dt, .spec-list dd { padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14px; line-height: 1.6; }
.spec-list dt { color: var(--ink-2); padding-right: 24px; }
.spec-list dd { margin: 0; }
.dlg-note { margin: 0; font-size: 13.5px; line-height: 1.7; padding: 12px 14px; background: var(--shu-tint); }
.dlg-note strong { color: var(--shu-deep); margin-right: 6px; }

/* ---------- about ---------- */
.statement-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.statement-grid .h-section { font-size: clamp(1.9rem, 1.3rem + 2.2vw, 2.9rem); }
.statement-body { display: grid; gap: 1.2em; }
.statement-body p { margin: 0; max-width: 34em; }
.principles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(28px, 4vw, 48px) clamp(28px, 5vw, 72px); }
.principles .why-item { grid-template-columns: auto minmax(0, 1fr); column-gap: 24px; }
.principles .kanji-row { grid-row: span 2; flex-direction: column; align-items: center; gap: 10px; }
.company { margin: 0; display: grid; grid-template-columns: minmax(0, 200px) minmax(0, 1fr); border-top: 1px solid var(--ink); max-width: 860px; }
.company dt, .company dd { padding: 20px 0; border-bottom: 1px solid var(--line); line-height: 1.7; }
.company dt { color: var(--ink-2); font-size: 14px; padding-right: 24px; }
.company dd { margin: 0; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 80px); align-items: start; }
.form { display: grid; gap: 22px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.field { display: grid; gap: 8px; min-width: 0; }
.field > label, .field > legend, .field-label { font-size: 14px; font-weight: 500; display: flex; gap: 8px; align-items: center; padding: 0; }
.req, .opt { font: 500 11px/1 var(--font-gothic); padding: 4px 6px; letter-spacing: .04em; }
.req { background: var(--shu); color: var(--on-shu); }
.opt { border: 1px solid var(--line); color: var(--ink-2); }
.field input, .field select, .field textarea {
  font: inherit; font-size: 16px; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 2px; padding: 13px 14px; width: 100%; min-width: 0;
}
.field textarea { min-height: 160px; resize: vertical; line-height: 1.7; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px var(--shu-tint); }
fieldset.field { border: 0; margin: 0; padding: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span { display: inline-block; font-size: 13px; padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px; line-height: 1.2; }
.chip input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip input:focus-visible + span { outline: 2px solid var(--shu); outline-offset: 2px; }
.form-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.form-status { margin: 0; font-size: 14px; line-height: 1.7; padding: 14px 16px; background: var(--paper-2); border-left: 3px solid var(--ink); }
.form-status[data-state="ok"] { border-color: var(--shu); }
.contact-aside { display: grid; gap: 36px; }
.flow { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: flow; }
.flow li { counter-increment: flow; display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 4px 12px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.flow li::before { content: counter(flow, decimal-leading-zero); grid-row: span 2; font: 300 1.6rem/1 var(--font-latin); color: var(--shu); font-variant-numeric: tabular-nums; }
.flow b { font-weight: 500; }
.flow span { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }
.direct { margin: 0; display: grid; grid-template-columns: max-content minmax(0, 1fr); border-top: 1px solid var(--ink); }
.direct dt, .direct dd { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.direct dt { color: var(--ink-2); padding-right: 20px; }
.direct dd { margin: 0; }
.aside-title { font-family: var(--font-mincho); font-weight: 600; font-size: 1.2rem; margin: 0 0 12px; }

/* ---------- footer ---------- */
.site-footer { background: var(--night); color: var(--night-ink); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: 40px; padding-block: 72px 48px; }
.footer-brand { display: grid; gap: 18px; align-content: start; }
.footer-brand img { width: 220px; height: auto; }
.footer-brand p { margin: 0; color: var(--night-mute); font-size: 14px; }
.footer-col h2 { font: 500 12px/1.4 var(--font-latin); letter-spacing: .2em; text-transform: uppercase; color: var(--night-mute); margin: 0 0 14px; }
html[lang="en"] .footer-col h2 { font-family: var(--font-gothic); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: 14px; }
.footer-col a { text-decoration: none; color: var(--night-ink); }
.footer-col a:hover { color: var(--night-mute); }
.footer-col dl { margin: 0; display: grid; gap: 10px; font-size: 14px; }
.footer-col dt { color: var(--night-mute); font-size: 12px; }
.footer-col dd { margin: 0; }
.footer-bottom { border-top: 1px solid var(--night-line); padding-block: 22px 28px; font: 400 12px/1.6 var(--font-latin); letter-spacing: .08em; color: var(--night-mute); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .product-grid, .why-grid, .market-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .market:nth-child(3) { border-left: 0; padding-left: 0; }
  .market:nth-child(n+3) { border-top: 1px solid var(--line); }
  .card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .core-grid { grid-template-columns: minmax(0, 1fr); }
  .core-card { grid-template-columns: minmax(0, 110px) minmax(0, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 880px) {
  .main-nav, .header-tools .btn { display: none; }
  .header-tools { margin-left: auto; }
  .menu-btn { display: inline-block; }
  .hero-grid, .brand-grid, .partner-row, .section-head--split, .statement-grid, .contact-grid, .cat-head { grid-template-columns: minmax(0, 1fr); }
  .section-head--split .lead, .cat-head p { justify-self: start; }
  .hero-art-wrap { max-width: 440px; width: 100%; justify-self: center; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dlg-grid { grid-template-columns: minmax(0, 1fr); }
  .dlg-gallery { padding: 16px; }
  .dlg-main { max-height: 46vh; aspect-ratio: auto; height: 46vh; }
  .dlg-thumbs img { max-height: 90px; }
  .dlg-info { padding: 24px 20px 28px; }
  .principles { grid-template-columns: minmax(0, 1fr); }
  .page-hero::after { width: 360px; height: 360px; right: -170px; opacity: .7;
    background:
      radial-gradient(circle at 50% 50%, var(--shu) 0 64px, transparent 65px),
      repeating-radial-gradient(circle at 50% 50%, transparent 0 76px, var(--line) 76px 77.5px, transparent 77.5px 88px); }
}
@media (max-width: 640px) {
  .brand-link img { height: 30px; }
  .header-row { min-height: 62px; gap: 12px; }
  .product-grid, .why-grid, .market-grid { grid-template-columns: minmax(0, 1fr); }
  .tile--wide { grid-column: auto; grid-template-columns: minmax(0, 1fr); }
  .market { padding-left: 0; padding-right: 0; }
  .market + .market { border-left: 0; border-top: 1px solid var(--line); }
  .facts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .tategaki { font-size: 12px; }
  .partner::before { display: none; }
  .partner::after { width: 220px; height: 220px; right: -90px; top: auto; bottom: -90px; transform: none; }
  .form-row { grid-template-columns: minmax(0, 1fr); }
  .page-hero::after { width: 220px; height: 220px; top: -40px; right: -90px; transform: none; opacity: 1;
    background:
      radial-gradient(circle at 50% 50%, var(--shu) 0 40px, transparent 41px),
      repeating-radial-gradient(circle at 50% 50%, transparent 0 50px, var(--line) 50px 51.5px, transparent 51.5px 60px); }
  .grade-row, .grade-scale { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .grade-scale > span { display: none; }
  .grade-step { padding: 14px 12px; }
  .grade-step b { font-size: 1.6rem; }
  .company { grid-template-columns: minmax(0, 1fr); }
  .company dt { padding-bottom: 0; border-bottom: 0; }
  .company dd { padding-top: 4px; }
}
@media (max-width: 460px) {
  .card-grid { grid-template-columns: minmax(0, 1fr); }
  .card { flex-direction: row; }
  .card-img { width: 38%; flex: none; aspect-ratio: auto; }
  .card-body { padding: 14px 14px 16px; }
}

.hero-product { width:100%; height:auto; display:block; border-radius:4px; }
.form-help { margin:0; color:var(--ink-2); font-size:14px; line-height:1.7; }
.footer-col a[href^="mailto:"] { overflow-wrap:anywhere; }

[hidden] { display:none !important; }
.dlg-thumbs:has(button[hidden]) { grid-template-columns:repeat(auto-fit,minmax(80px,120px)); }