/* tō pottery — 共通スタイルシート
   完成イメージに合わせたサンセリフ基調。静か・モノクロ・余白。作品写真が主役。 */

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

:root {
  --black:      #111111;
  --white:      #FFFFFF;
  --off-white:  #F5F3EF;
  --line:       #EBEBEB;
  --mid:        #8A8A8A;
  --dark:       #333333;
  --terracotta: #B85F4B;

  --sans-en: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --sans-jp: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;

  --pad-x: 3rem;
  --max-w: 1280px;
  --header-h: 68px;
}

html { scroll-behavior: smooth; font-size: 15px; }

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--sans-jp);
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--black); color: var(--white); }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
ul { list-style: none; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--terracotta);
  outline-offset: 2px;
}

main { display: block; padding-top: var(--header-h); }

/* ── 欧文ラベル共通 ─────────────────────────────────────── */
.en, .nav-links a, .work-name, .work-price, .link-arrow, .section-label, .badge,
.product-spec dt, .product-pager, .filter-btn, .process-num, .footer-nav a, .footer-sub a,
.footer-copy, .footer-top, .artist-label, .brand-word {
  font-family: var(--sans-en);
}

/* ── Header ─────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 0 var(--pad-x);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand img { width: 30px; height: 30px; }
.brand-word { font-size: 0.95rem; letter-spacing: 0.08em; color: var(--black); }
.brand--light .brand-word { color: var(--white); }
.brand--light img { filter: invert(1); }

.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  font-family: var(--sans-jp);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--black);
  padding: 0.4rem 0;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--terracotta); }

.nav-right { display: flex; align-items: center; gap: 1.2rem; }
.nav-shop { display: flex; align-items: center; color: var(--black); padding: 0.4rem; }
.nav-shop:hover { color: var(--terracotta); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none; border: none;
  padding: 10px;
  margin-right: -10px;
  -webkit-tap-highlight-color: transparent;
}
.hamburger span { display: block; width: 22px; height: 1px; background: var(--black); }

.mobile-menu {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--white);
  z-index: 99;
  flex-direction: column;
  padding: 2rem var(--pad-x);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 1rem;
  letter-spacing: 0.08em;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  min-height: 48px;
}

/* ── レイアウト共通 ────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 3.5rem var(--pad-x) 5rem; }
.container--top { padding-top: 2.4rem; }

.page-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 2.4rem; flex-wrap: wrap; }
.page-title { font-family: var(--sans-jp); font-size: 1.25rem; font-weight: 400; letter-spacing: 0.14em; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin: 0 0 1.4rem; }
.section-label { font-size: 0.72rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--black); }

.lead { font-size: 0.85rem; color: var(--dark); max-width: 36rem; margin-bottom: 2.4rem; }
.empty-note { font-size: 0.85rem; color: var(--mid); padding: 2rem 0; }

.link-arrow {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  border-bottom: 1px solid var(--black);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.link-arrow::after { content: '\2192'; margin-left: 0.5em; }
.link-arrow:hover { color: var(--terracotta); border-color: var(--terracotta); }
.link-arrow--light { color: var(--white); border-color: rgba(255,255,255,0.7); }
.link-arrow--light:hover { color: var(--white); border-color: var(--white); }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--sans-jp);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-align: center;
  padding: 0.95rem 2.2rem;
  border: 1px solid var(--black);
  color: var(--black);
  background: transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.btn:hover { background: var(--black); color: var(--white); }
.btn--primary { background: var(--terracotta); border-color: var(--terracotta); color: var(--white); }
.btn--primary:hover { background: #a2503e; border-color: #a2503e; color: var(--white); }
.btn--small { padding: 0.65rem 1.5rem; font-size: 0.72rem; }
.btn--disabled { border-color: var(--line); color: var(--mid); cursor: default; pointer-events: none; }

/* ── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-block;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 0.22rem 0.55rem;
  line-height: 1.4;
  vertical-align: middle;
  white-space: nowrap;
}
.badge-new { background: var(--terracotta); color: var(--white); }
.badge-soldout { border: 1px solid var(--mid); color: var(--mid); }
.badge-archive { border: 1px solid var(--line); color: var(--mid); }

/* ── Works grid ─────────────────────────────────────────── */
.works-filter { display: flex; gap: 1.8rem; margin-bottom: 2rem; border-bottom: 1px solid var(--line); overflow-x: auto; }
.filter-btn {
  font-family: var(--sans-jp);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mid);
  background: none; border: none; cursor: pointer;
  padding: 0 0 0.8rem;
  position: relative;
  white-space: nowrap;
}
.filter-btn::after { content: ''; position: absolute; bottom: -1px; left: 0; right: 0; height: 1px; background: var(--black); transform: scaleX(0); transition: transform 0.2s; }
.filter-btn.active { color: var(--black); }
.filter-btn.active::after { transform: scaleX(1); }

.works-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.2rem 1.4rem; }
.works-grid--4 { grid-template-columns: repeat(4, 1fr); }

.work-item { display: block; }
.work-image { aspect-ratio: 1; background: var(--white); overflow: hidden; }
.work-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.work-item:hover .work-image img { transform: scale(1.03); }

.image-placeholder { width: 100%; height: 100%; min-height: 120px; display: flex; align-items: center; justify-content: center; background: #F2F2F2; }
.image-placeholder span { font-family: var(--sans-en); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--mid); text-transform: uppercase; }

.work-meta { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.6rem; padding-top: 0.8rem; }
.work-name { font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--black); }
.work-price { font-size: 0.7rem; letter-spacing: 0.06em; color: var(--dark); margin-top: 0.25rem; }
.work-meta .badge { margin-top: 0.1rem; }

.container--top .link-arrow { margin-top: 2.2rem; }

/* ── Banner（テラコッタ帯） ─────────────────────────────── */
.banner { display: grid; grid-template-columns: 1fr 1fr; height: 300px; }
.banner-text {
  background: var(--terracotta);
  color: var(--white);
  display: flex; flex-direction: column; justify-content: center; align-items: flex-start;
  padding: 2.5rem var(--pad-x);
}
.banner-text p { font-size: 0.95rem; letter-spacing: 0.16em; line-height: 2.2; }
.banner-rule { display: block; width: 32px; height: 1px; background: rgba(255,255,255,0.8); margin: 1.2rem 0; }
.banner-photo { background: var(--black); overflow: hidden; height: 100%; min-height: 0; }
.banner-photo img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1); opacity: 0.9; }
.banner--top { grid-template-columns: 38% 1fr; }
.banner--bottom { grid-template-columns: 1fr 32%; margin-top: 2rem; }
.banner-text--vertical { align-items: center; justify-content: center; text-align: center; }
.banner-text--vertical p { letter-spacing: 0.3em; font-size: 1rem; }

.teaser-row { display: flex; justify-content: space-between; align-items: center; gap: 2rem; border-bottom: 1px solid var(--line); padding-bottom: 2.4rem; }
.teaser-text { font-size: 0.85rem; color: var(--dark); }

/* ── Instagram grid ─────────────────────────────────────── */
.ig-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.5rem; }
.ig-grid a { display: block; aspect-ratio: 1; overflow: hidden; background: var(--white); }
.ig-grid img { width: 100%; height: 100%; object-fit: cover; transition: opacity 0.2s; }
.ig-grid a:hover img { opacity: 0.85; }
.ig-grid--all { grid-template-columns: repeat(6, 1fr); }
.sns-links { display: flex; gap: 2rem; margin-top: 1.6rem; }
.sns-block { margin-top: 3.5rem; }

/* ── Product detail ─────────────────────────────────────── */
.product-detail { display: grid; grid-template-columns: 64px minmax(0, 1fr) 360px; gap: 1.2rem 3rem; align-items: start; }
.product-thumbs { display: flex; flex-direction: column; gap: 0.5rem; }
.product-thumb { width: 64px; aspect-ratio: 1; padding: 0; border: 1px solid transparent; background: var(--white); cursor: pointer; overflow: hidden; opacity: 0.6; transition: opacity 0.2s; }
.product-thumb.active, .product-thumb:hover { opacity: 1; border-color: var(--black); }
.product-thumb img { width: 100%; height: 100%; object-fit: cover; }

.product-main-image { aspect-ratio: 1; background: var(--white); overflow: hidden; }
.product-main-image img { width: 100%; height: 100%; object-fit: cover; }
.product-pager { display: flex; justify-content: center; align-items: center; gap: 1.2rem; margin-top: 1rem; font-size: 0.72rem; letter-spacing: 0.1em; color: var(--dark); }
.product-pager a, .product-pager span[aria-hidden] { font-size: 1.1rem; line-height: 1; color: var(--black); padding: 0.3rem 0.5rem; }
.product-pager span[aria-hidden] { color: var(--line); }

.product-name { font-family: var(--sans-en); font-size: 1.05rem; font-weight: 400; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 0.4rem; display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.product-price { font-family: var(--sans-en); font-size: 1rem; letter-spacing: 0.06em; margin-bottom: 1.8rem; }

.product-spec { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.6rem; }
.product-spec div { display: grid; grid-template-columns: 6.5rem 1fr; gap: 1rem; font-size: 0.78rem; }
.product-spec dt { color: var(--mid); letter-spacing: 0.05em; }
.product-spec dd { color: var(--dark); }

.product-note { font-size: 0.74rem; line-height: 1.9; color: var(--dark); margin-bottom: 1.6rem; }
.product-cta .btn { display: block; width: 100%; }
.buy-note { font-size: 0.68rem; color: var(--mid); margin-top: 0.5rem; text-align: center; }

.accordion { margin-top: 2.2rem; border-top: 1px solid var(--line); }
.accordion details { border-bottom: 1px solid var(--line); }
.accordion summary {
  list-style: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.78rem; letter-spacing: 0.06em;
  padding: 0.95rem 0;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: '+'; font-family: var(--sans-en); font-size: 1rem; color: var(--mid); }
.accordion details[open] summary::after { content: '\2212'; }
.accordion-body { padding: 0 0 1.2rem; font-size: 0.78rem; line-height: 2; color: var(--dark); }
.accordion-body a { text-decoration: underline; text-underline-offset: 3px; }

/* ── ABOUT ──────────────────────────────────────────────── */
.about-layout { display: grid; grid-template-columns: 46% 1fr; min-height: calc(100vh - var(--header-h)); }
.about-photo { background: var(--white); overflow: hidden; }
.about-photo img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1); }
.about-text { padding: 3.5rem 4rem 4rem; max-width: 620px; }
.about-text .page-title { margin-bottom: 2rem; }
.about-body p { font-size: 0.82rem; line-height: 2.1; color: var(--dark); margin-bottom: 1.3rem; }
.about-sign { letter-spacing: 0.12em; color: var(--black) !important; }

.artist { display: flex; gap: 1.6rem; align-items: flex-end; margin-top: 3rem; }
.artist-photo { width: 84px; aspect-ratio: 3/4; overflow: hidden; background: var(--white); flex-shrink: 0; }
.artist-photo img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1); }
.artist-text p { font-size: 0.72rem; line-height: 1.9; color: var(--dark); }
.artist-label { font-size: 0.62rem; letter-spacing: 0.12em; color: var(--mid) !important; margin-bottom: 0.3rem; }

/* ── PROCESS ────────────────────────────────────────────── */
.process-list { display: flex; flex-direction: column; }
.process-step { display: grid; grid-template-columns: 200px 1fr; gap: 2.2rem; align-items: center; padding: 0.55rem 0; }
.process-photo { aspect-ratio: 16/10; background: var(--white); overflow: hidden; }
.process-photo img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1); }
.process-num { font-size: 0.72rem; letter-spacing: 0.12em; color: var(--terracotta); margin-bottom: 0.3rem; }
.process-title { font-family: var(--sans-jp); font-size: 1rem; font-weight: 400; letter-spacing: 0.1em; margin-bottom: 0.4rem; }
.process-body { font-size: 0.76rem; line-height: 1.9; color: var(--dark); max-width: 30rem; }

.process-branch { margin: 2rem 0; padding: 2.2rem 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.process-branch-lead { font-size: 0.78rem; color: var(--dark); margin-bottom: 1.6rem; }
.branch-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.4rem; }
.branch-item .process-photo { margin-bottom: 1rem; }

/* ── EVENTS ─────────────────────────────────────────────── */
.event-card { display: grid; grid-template-columns: 42% 1fr; gap: 2.4rem; align-items: center; margin-bottom: 2rem; }
.event-photo { aspect-ratio: 16/10; background: var(--white); overflow: hidden; }
.event-photo img { width: 100%; height: 100%; object-fit: cover; }
.event-title { font-family: var(--sans-jp); font-size: 1rem; font-weight: 400; letter-spacing: 0.1em; margin-bottom: 0.6rem; }
.event-meta { font-family: var(--sans-en); font-size: 0.78rem; letter-spacing: 0.06em; color: var(--dark); margin-bottom: 1rem; }
.event-desc { font-size: 0.78rem; color: var(--dark); margin-bottom: 1rem; }
.past-events { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); }

/* ── CONTACT ────────────────────────────────────────────── */
.contact-inner { display: grid; grid-template-columns: 1fr 1.3fr; gap: 4rem; align-items: start; }
.contact-body { font-size: 0.82rem; line-height: 2.1; color: var(--dark); }
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; font-size: 0.68rem; letter-spacing: 0.08em; color: var(--mid); margin-bottom: 0.4rem; }
.form-input, .form-textarea {
  width: 100%; background: transparent; border: none; border-bottom: 1px solid var(--line);
  padding: 0.7rem 0; font-family: var(--sans-jp); font-size: 1rem; color: var(--black);
  outline: none; transition: border-color 0.2s; -webkit-appearance: none; border-radius: 0;
}
.form-input:focus, .form-textarea:focus { border-bottom-color: var(--black); }
.form-textarea { resize: vertical; min-height: 6rem; }
.form-status { margin-top: 1rem; font-size: 0.78rem; color: var(--dark); }

/* ── 静的ページ ─────────────────────────────────────────── */
.prose { max-width: 42rem; }
.prose h2 { font-family: var(--sans-jp); font-size: 0.92rem; font-weight: 500; letter-spacing: 0.08em; margin: 2.2rem 0 0.8rem; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose ul { font-size: 0.82rem; line-height: 2; color: var(--dark); margin-bottom: 1rem; }
.prose ul { padding-left: 1.3rem; list-style: disc; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.8rem; margin-bottom: 1.5rem; }
.prose th, .prose td { text-align: left; padding: 0.8rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { width: 32%; color: var(--mid); font-weight: 400; }
.text-mid { color: var(--mid); }

/* ── Footer（黒） ───────────────────────────────────────── */
footer { background: var(--black); color: var(--white); margin-top: 2rem; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 2.6rem var(--pad-x) 2rem; }
.footer-row { display: flex; align-items: center; gap: 1.6rem; flex-wrap: wrap; }
.footer-nav { display: flex; gap: 1.1rem; }
.footer-nav a { font-family: var(--sans-jp); font-size: 0.64rem; letter-spacing: 0.06em; color: var(--white); white-space: nowrap; }
.footer-right { display: flex; align-items: center; gap: 1.2rem; margin-left: auto; flex-wrap: wrap; }
.footer-sub { display: flex; gap: 0.9rem; }
.footer-sub a { font-family: var(--sans-jp); font-size: 0.6rem; letter-spacing: 0.04em; color: rgba(255,255,255,0.75); white-space: nowrap; }
.footer-sns { display: flex; align-items: center; gap: 0.9rem; padding-left: 1.2rem; border-left: 1px solid rgba(255,255,255,0.25); }
.footer-sns a { display: flex; align-items: center; font-family: var(--sans-en); font-size: 0.64rem; letter-spacing: 0.06em; color: rgba(255,255,255,0.85); }
.footer-nav a:hover, .footer-sub a:hover, .footer-sns a:hover { color: var(--terracotta); }
.footer-row--bottom { justify-content: space-between; margin-top: 2rem; padding-top: 1.4rem; border-top: 1px solid rgba(255,255,255,0.12); }
.footer-copy { font-size: 0.64rem; letter-spacing: 0.06em; color: rgba(255,255,255,0.6); }
.footer-top { font-size: 0.64rem; letter-spacing: 0.1em; color: rgba(255,255,255,0.8); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 1100px) {
  .works-grid--4 { grid-template-columns: repeat(3, 1fr); }
  .product-detail { grid-template-columns: 56px minmax(0, 1fr) 300px; gap: 1rem 2rem; }
  .ig-grid--all { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 900px) {
  :root { --pad-x: 1.4rem; --header-h: 60px; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .brand img { width: 26px; height: 26px; }
  .brand-word { font-size: 0.85rem; }
  .container { padding: 2.4rem var(--pad-x) 3.5rem; }

  .works-grid, .works-grid--4 { grid-template-columns: repeat(2, 1fr); gap: 1.6rem 0.9rem; }

  .banner, .banner--top, .banner--bottom { grid-template-columns: 1fr; height: auto; }
  .banner-photo { height: 200px; }
  .banner--bottom .banner-photo { order: 1; }
  .banner--bottom .banner-text { order: 2; }
  .banner-text { padding: 2rem var(--pad-x); }
  .banner-text--vertical p { letter-spacing: 0.2em; }
  .teaser-row { flex-direction: column; align-items: flex-start; gap: 1.2rem; }
  .ig-grid { grid-template-columns: repeat(3, 1fr); }
  .ig-grid--all { grid-template-columns: repeat(3, 1fr); }

  .product-detail { grid-template-columns: 1fr; gap: 1.4rem; }
  .product-thumbs { order: 2; flex-direction: row; overflow-x: auto; }
  .product-main { order: 1; }
  .product-info { order: 3; }

  .about-layout { grid-template-columns: 1fr; min-height: 0; }
  .about-photo { aspect-ratio: 4/3; }
  .about-text { padding: 2.4rem var(--pad-x) 3rem; }

  .process-step { grid-template-columns: 1fr; gap: 1rem; padding: 1.2rem 0; }
  .branch-grid { grid-template-columns: 1fr; }
  .event-card { grid-template-columns: 1fr; gap: 1.2rem; }
  .contact-inner { grid-template-columns: 1fr; gap: 2rem; }

  .footer-row { flex-direction: column; align-items: flex-start; gap: 1.4rem; }
  .footer-right { margin-left: 0; flex-direction: column; align-items: flex-start; }
  .footer-sub { flex-wrap: wrap; gap: 0.6rem 1.2rem; }
  .footer-sns { padding-left: 0; border-left: none; }
  .footer-row--bottom { flex-direction: row; justify-content: space-between; }
}

@media (hover: none) {
  .work-item:hover .work-image img { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}