/*
Theme Name: Sekai Art no Tobira
Description: 世界アートの扉 izutsuya.art 専用テーマ（白基調ギャラリー / 問い合わせ購入導線）
Author: IZUTSUYA
Version: 2026.08.14
*/
:root{
  --ink:#1c1a17;
  --brass:#9a7b4f;
  --paper:#faf8f5;
  --paper-deep:#f2efe9;
  --line:#e3ded5;
  --sub:#6f6a61;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
  background:var(--paper);color:var(--ink);
  line-height:1.75;font-size:15px;
  -webkit-font-smoothing:antialiased;
}
.serif{font-family:"Yu Mincho","Hiragino Mincho ProN","Noto Serif JP",serif;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:1200px;margin:0 auto;padding:0 28px;}

/* ---- label ---- */
.label{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11px;font-weight:700;letter-spacing:.18em;color:var(--brass);
}
.label::before{content:"";width:18px;height:2px;background:var(--brass);}

/* ---- header ---- */
.site-header{
  position:sticky;top:0;z-index:10;
  background:rgba(250,248,245,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.hwrap{
  max-width:1200px;margin:0 auto;padding:0 28px;
  display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px;
}
.logo{font-size:19px;letter-spacing:.22em;font-weight:600;white-space:nowrap;}
.logo small{
  display:block;font-family:"Hiragino Kaku Gothic ProN",sans-serif;
  font-size:9px;letter-spacing:.28em;color:var(--sub);font-weight:400;margin-top:1px;
}
.gnav{display:flex;gap:30px;font-size:13px;letter-spacing:.06em;}
.gnav a{padding:4px 0;border-bottom:2px solid transparent;transition:border-color .2s;}
.gnav a:hover{border-color:var(--brass);}
.nav-cta{
  border:1px solid var(--ink);padding:9px 20px;border-radius:2px;
  font-size:12.5px;letter-spacing:.08em;transition:background .2s,color .2s;white-space:nowrap;
}
.nav-cta:hover{background:var(--ink);color:var(--paper);}

/* ---- buttons ---- */
.btn{
  display:inline-block;padding:14px 34px;border-radius:2px;
  font-size:13.5px;letter-spacing:.1em;transition:opacity .2s,background .2s,color .2s;
  border:1px solid var(--ink);cursor:pointer;
}
.btn-primary{background:var(--ink);color:var(--paper);}
.btn-primary:hover{opacity:.82;}
.btn-ghost:hover{background:var(--ink);color:var(--paper);}
.btn-block{display:block;text-align:center;width:100%;}

/* ---- hero ---- */
.hero{max-width:1200px;margin:0 auto;padding:72px 28px 80px;
  display:grid;grid-template-columns:1fr 460px;gap:64px;align-items:center;}
.hero h1{
  font-size:clamp(30px,3.6vw,44px);line-height:1.45;letter-spacing:.08em;
  font-weight:600;margin:22px 0 18px;
}
.hero .lede{color:var(--sub);max-width:420px;line-height:1.9;font-size:14.5px;}
.hero-actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap;}
.hero-figure{position:relative;}
.hero-figure .frame{
  border:1px solid var(--line);background:#fff;padding:16px;border-radius:2px;
  box-shadow:0 24px 60px -30px rgba(28,26,23,.35);
}
.hero-figure .frame img{aspect-ratio:4/5;object-fit:cover;width:100%;}
.hero-caption{
  margin-top:14px;display:flex;justify-content:space-between;align-items:baseline;
  font-size:11.5px;color:var(--sub);letter-spacing:.05em;
}
.hero-caption b{color:var(--ink);font-weight:600;letter-spacing:.08em;}

/* ---- trust strip ---- */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper-deep);}
.trust-inner{
  max-width:1200px;margin:0 auto;padding:18px 28px;
  display:flex;gap:40px;flex-wrap:wrap;
  font-size:12.5px;color:var(--sub);letter-spacing:.04em;
}
.trust-inner span b{color:var(--ink);font-weight:600;}

/* ---- section ---- */
.section{max-width:1200px;margin:0 auto;padding:84px 28px 96px;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:40px;gap:16px;flex-wrap:wrap;}
.section-head h2{font-size:26px;letter-spacing:.14em;font-weight:600;margin-top:14px;}
.more-link{font-size:13px;letter-spacing:.08em;border-bottom:1px solid var(--ink);padding-bottom:2px;}
.more-link:hover{color:var(--brass);border-color:var(--brass);}

/* ---- works grid ---- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;}
.card{background:#fff;border:1px solid var(--line);border-radius:2px;transition:box-shadow .25s,transform .25s;}
.card:hover{box-shadow:0 18px 44px -22px rgba(28,26,23,.3);transform:translateY(-3px);}
.card .thumb{padding:14px 14px 0;}
.card .thumb img{aspect-ratio:4/5;object-fit:cover;border:1px solid var(--line);width:100%;}
.card-body{padding:18px 20px 22px;}
.status{
  font-size:10.5px;font-weight:700;letter-spacing:.16em;color:var(--brass);
  display:inline-flex;align-items:center;gap:7px;
}
.status::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brass);}
.status.is-sold{color:var(--sub);}
.status.is-sold::before{background:var(--sub);}
.card-body h3{font-size:17px;letter-spacing:.06em;font-weight:600;margin:8px 0 2px;}
.card-artist{font-size:12.5px;color:var(--sub);letter-spacing:.05em;}
.card-foot{
  display:flex;justify-content:space-between;align-items:baseline;
  margin-top:14px;padding-top:14px;border-top:1px solid var(--line);
}
.price{font-size:16px;font-weight:600;letter-spacing:.03em;}
.price small{font-size:10.5px;color:var(--sub);font-weight:400;margin-left:4px;}
.card-link{font-size:12px;color:var(--sub);letter-spacing:.06em;}
.card:hover .card-link{color:var(--brass);}

/* ---- flow ---- */
.flow{border-top:1px solid var(--line);background:var(--paper-deep);}
.flow-inner{max-width:1200px;margin:0 auto;padding:76px 28px 84px;
  display:grid;grid-template-columns:minmax(0,420px) 1fr;gap:64px;}
.flow h2{font-size:24px;letter-spacing:.14em;font-weight:600;margin:14px 0 16px;}
.flow p{color:var(--sub);font-size:14px;line-height:1.9;}
.steps{list-style:none;display:grid;gap:0;align-self:center;}
.steps li{
  display:grid;grid-template-columns:56px 1fr;gap:18px;align-items:baseline;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.steps li:first-child{border-top:1px solid var(--line);}
.step-no{font-size:20px;letter-spacing:.1em;color:var(--brass);}
.steps b{font-size:15px;letter-spacing:.06em;display:block;margin-bottom:2px;}
.steps span{font-size:13px;color:var(--sub);}

/* ---- artwork detail ---- */
.artwork{max-width:1200px;margin:0 auto;padding:56px 28px 96px;
  display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:64px;align-items:start;}
.artwork-figure{position:sticky;top:96px;}
.artwork-figure .frame{
  border:1px solid var(--line);background:#fff;padding:20px;border-radius:2px;
  box-shadow:0 24px 60px -30px rgba(28,26,23,.3);
}
.artwork-figure .frame img{width:100%;}
.artwork-side h1{font-size:30px;letter-spacing:.06em;font-weight:600;line-height:1.4;margin:10px 0 6px;}
.artwork-side .by{font-size:13.5px;color:var(--sub);letter-spacing:.05em;}
.artwork-side .by a{border-bottom:1px solid var(--line);}
.artwork-side .by a:hover{color:var(--brass);border-color:var(--brass);}
.artwork-price{font-size:26px;font-weight:600;letter-spacing:.03em;margin:22px 0 4px;}
.artwork-price small{font-size:12px;color:var(--sub);font-weight:400;margin-left:6px;}
.spec{width:100%;border-collapse:collapse;margin:22px 0 26px;font-size:13.5px;}
.spec th,.spec td{padding:10px 2px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;}
.spec th{color:var(--sub);font-weight:400;width:7em;letter-spacing:.05em;}
.artwork-notes{margin-top:18px;font-size:12.5px;color:var(--sub);line-height:2;}
.artwork-notes b{color:var(--ink);font-weight:600;}
.artwork-desc{margin-top:20px;font-size:14px;color:var(--sub);line-height:2;}
.sold-note{
  border:1px solid var(--line);background:var(--paper-deep);border-radius:2px;
  padding:14px 18px;font-size:13px;color:var(--sub);margin-top:8px;
}

/* ---- archive / artist ---- */
.page-head{max-width:1200px;margin:0 auto;padding:64px 28px 0;}
.page-head h1{font-size:30px;letter-spacing:.12em;font-weight:600;margin-top:14px;}
.page-head .desc{color:var(--sub);font-size:14px;max-width:640px;margin-top:12px;line-height:1.9;}
.archive-grid{padding-top:44px;}
.filterbar{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px;}
.filterbar a{
  border:1px solid var(--line);background:#fff;border-radius:2px;
  padding:7px 16px;font-size:12.5px;letter-spacing:.05em;transition:background .2s,color .2s;
}
.filterbar a:hover{border-color:var(--ink);}
.filterbar a.is-active{background:var(--ink);color:var(--paper);border-color:var(--ink);}

/* ---- artists list ---- */
.artist-list{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;}
.artist-card{background:#fff;border:1px solid var(--line);border-radius:2px;padding:26px 26px 24px;transition:box-shadow .25s;}
.artist-card:hover{box-shadow:0 18px 44px -22px rgba(28,26,23,.25);}
.artist-card h3{font-size:18px;letter-spacing:.08em;font-weight:600;margin-bottom:4px;}
.artist-card .count{font-size:12px;color:var(--sub);letter-spacing:.05em;}

/* ---- prose (固定ページ/記事) ---- */
.prose{max-width:760px;margin:0 auto;padding:56px 28px 96px;}
.prose h1{font-size:30px;letter-spacing:.1em;font-weight:600;margin-bottom:28px;line-height:1.5;}
.prose h2{font-size:21px;letter-spacing:.08em;font-weight:600;margin:44px 0 14px;padding-bottom:10px;border-bottom:1px solid var(--line);}
.prose h3{font-size:17px;font-weight:600;margin:30px 0 10px;}
.prose p{margin:0 0 1.2em;color:#3b3833;}
.prose ul,.prose ol{margin:0 0 1.4em 1.4em;color:#3b3833;}
.prose li{margin-bottom:.4em;}
.prose img{border:1px solid var(--line);border-radius:2px;}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.6em;font-size:14px;}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.prose th{background:var(--paper-deep);font-weight:600;}
.prose a{color:var(--brass);border-bottom:1px solid currentColor;}

/* ---- journal list ---- */
.journal-list{max-width:860px;margin:0 auto;padding:44px 28px 96px;}
.journal-item{display:grid;grid-template-columns:200px 1fr;gap:28px;padding:26px 0;border-bottom:1px solid var(--line);align-items:center;}
.journal-item img{aspect-ratio:16/10;object-fit:cover;border:1px solid var(--line);border-radius:2px;}
.journal-item h2{font-size:18px;letter-spacing:.04em;font-weight:600;line-height:1.6;}
.journal-item h2 a:hover{color:var(--brass);}
.journal-item time{font-size:12px;color:var(--sub);letter-spacing:.06em;}

/* ---- pagination ---- */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:56px;font-size:13px;}
.pagination .page-numbers{border:1px solid var(--line);background:#fff;border-radius:2px;padding:8px 14px;}
.pagination .page-numbers.current{background:var(--ink);color:var(--paper);border-color:var(--ink);}
.pagination a.page-numbers:hover{border-color:var(--ink);}

/* ---- footer ---- */
.site-footer{border-top:1px solid var(--line);margin-top:0;}
.fwrap{max-width:1200px;margin:0 auto;padding:40px 28px 36px;
  display:flex;flex-direction:column;align-items:center;gap:18px;
  font-size:12px;color:var(--sub);letter-spacing:.05em;text-align:center;}
.fnav{display:flex;gap:28px;flex-wrap:wrap;justify-content:center;}
.fcopy{display:block;}
.fnav a:hover{color:var(--ink);}

/* ---- mobile ---- */
@media (max-width:900px){
  /* ヘッダーを2段に。1段目=ロゴ+CTA、2段目=ナビ帯（入り切らなければ横スワイプ） */
  .hwrap{flex-wrap:wrap;height:auto;min-height:64px;padding:0 22px;row-gap:0;}
  .logo{order:1;padding:9px 0;}
  .nav-cta{order:2;}
  .gnav{
    order:3;width:100%;gap:22px;font-size:12.5px;
    border-top:1px solid var(--line);margin-top:9px;padding:9px 0;
    overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;
  }
  .gnav::-webkit-scrollbar{display:none;}
  .gnav a{white-space:nowrap;padding:0;border-bottom:none;}
  .hero{grid-template-columns:1fr;padding:44px 22px 56px;gap:44px;}
  .hero h1{font-size:26px;}
  .hero .lede{max-width:none;}
  .grid{grid-template-columns:1fr;gap:26px;}
  .section{padding:64px 22px 72px;}
  .flow-inner{grid-template-columns:1fr;padding:60px 22px 68px;gap:36px;}
  .trust-inner{gap:14px;flex-direction:column;padding:20px 22px;}
  .artwork{grid-template-columns:1fr;gap:36px;padding:36px 22px 72px;}
  .artwork-figure{position:static;}
  .artist-list{grid-template-columns:1fr;}
  .journal-item{grid-template-columns:1fr;gap:14px;}
  .page-head{padding:44px 22px 0;}
  .fwrap{padding:32px 22px;gap:14px;}
  .fnav{gap:12px 18px;}
}
@media (min-width:901px) and (max-width:1100px){
  .grid{grid-template-columns:repeat(2,1fr);}
  .artist-list{grid-template-columns:repeat(2,1fr);}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;}
}

/* ---- contact form ---- */
.contact-form{margin-top:28px;}
.hp-field{position:absolute;left:-9999px;top:-9999px;}
.form-row{margin-bottom:20px;}
.form-row label{display:block;font-size:13px;font-weight:600;letter-spacing:.05em;margin-bottom:7px;}
.form-row .req{
  font-size:10px;color:#a04d3c;font-weight:700;letter-spacing:.1em;margin-left:6px;
}
.form-row input,.form-row textarea{
  width:100%;border:1px solid var(--line);background:#fff;border-radius:2px;
  padding:12px 14px;font-size:15px;font-family:inherit;color:var(--ink);
}
.form-row input:focus,.form-row textarea:focus{outline:2px solid var(--brass);outline-offset:0;border-color:var(--brass);}
.form-privacy{font-size:12px;color:var(--sub);margin-top:14px;}
.form-notice{border:1px solid var(--line);border-radius:2px;padding:16px 20px;font-size:14px;margin:20px 0;background:#fff;}
.form-notice.is-ok{border-color:var(--brass);}
.form-notice.is-error{border-color:#a04d3c;color:#7a3628;}

/* prose内ボタンはリンク装飾を打ち消す */
.prose a.btn{border-bottom:none;color:inherit;}
.prose a.btn-primary{color:var(--paper);}

/* ---- journal cards ---- */
.journal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;}
.jcard{background:#fff;border:1px solid var(--line);border-radius:2px;transition:box-shadow .25s,transform .25s;}
.jcard:hover{box-shadow:0 18px 44px -22px rgba(28,26,23,.3);transform:translateY(-3px);}
.jcard-thumb img{aspect-ratio:16/10;object-fit:cover;width:100%;border-bottom:1px solid var(--line);}
.jcard-body{padding:18px 20px 22px;}
.jcard-meta{display:flex;align-items:baseline;gap:14px;font-size:11px;color:var(--sub);letter-spacing:.08em;margin-bottom:8px;}
.jcard-cat{color:var(--brass);font-weight:700;letter-spacing:.14em;}
.jcard-body h2{font-size:16px;letter-spacing:.04em;font-weight:600;line-height:1.6;}
.jcard:hover h2{color:var(--brass);}

/* ---- article ---- */
.article-head{max-width:760px;margin:0 auto;padding:56px 28px 0;}
.article-head h1{font-size:30px;letter-spacing:.06em;font-weight:600;line-height:1.55;margin-top:10px;}
.article-eyecatch{max-width:960px;margin:36px auto 0;padding:0 28px;}
.article-eyecatch img{width:100%;border:1px solid var(--line);border-radius:2px;}
.article-body{padding-top:40px;}

/* ---- article cta ---- */
.article-cta{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper-deep);}
.article-cta-inner{max-width:960px;margin:0 auto;padding:44px 28px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.article-cta-title{font-size:22px;letter-spacing:.08em;font-weight:600;margin:12px 0 6px;}
.article-cta-lede{font-size:13px;color:var(--sub);}

@media (max-width:900px){
  .journal-grid{grid-template-columns:1fr;gap:26px;}
  .article-head{padding:40px 22px 0;}
  .article-head h1{font-size:23px;}
  .article-eyecatch{padding:0 22px;margin-top:28px;}
  .article-cta-inner{padding:36px 22px;}
}
@media (min-width:901px) and (max-width:1100px){
  .journal-grid{grid-template-columns:repeat(2,1fr);}
}

/* prose内の表は自身の中で横スクロール／長いURLは折り返す */
.prose table{display:block;overflow-x:auto;}
.prose a{overflow-wrap:anywhere;}


/* 狭幅（〜420px）でロゴとCTAを1段に収める */
@media (max-width:420px){
  .hwrap{padding:0 16px;gap:10px;}
  .logo{font-size:17px;letter-spacing:.16em;}
  .logo small{letter-spacing:.2em;}
  .nav-cta{padding:8px 13px;font-size:11.5px;letter-spacing:.05em;}
  .gnav{gap:18px;font-size:12px;}
}

/* ---- 作品詳細の追従CTA（インラインCTAが画面上に抜けたら出る） ---- */
.afab{
  position:fixed;right:20px;bottom:20px;z-index:30;
  display:block;max-width:min(300px,calc(100vw - 40px));
  padding:12px 20px;border-radius:2px;
  background:var(--ink);color:var(--paper);
  box-shadow:0 16px 40px -18px rgba(28,26,23,.65);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s,transform .22s,visibility .22s;
}
.afab.is-visible{opacity:1;visibility:visible;transform:none;}
.afab-title{
  display:block;font-size:11px;letter-spacing:.06em;color:rgba(250,248,245,.62);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.afab-act{display:block;font-size:13px;letter-spacing:.08em;margin-top:2px;white-space:nowrap;}
.afab:hover{opacity:.88;}
@media (max-width:420px){
  .afab{right:16px;bottom:16px;padding:11px 16px;}
  .afab-act{font-size:12.5px;}
}