/* ============================================================================
   ISAN — 世界遺産とつながる、知の探求サイト
   v5  Museum-grade  (Louvre / British Museum / Smithsonian / NatGeo 実測ベンチマーク準拠)
   原則: 近黒インク + 白/淡灰の地色 keyline + 単一の赤(#CC1400)を極小使用
        + 大判写真フチなし + 写真の下に小キャプション(暗いグラデ廃止)
        + 細ヘアライン + 大きな側余白 + 静謐モーション + dominant-color LQIP
   ゴシック(Noto Sans JP)のみ。アイコン・絵文字 不使用。
   ============================================================================ */
:root{
  --bg:#FFFFFF;
  --soft:#F7F4EF;          /* セクション交替地色 */
  --soft-2:#F1ECE4;
  --ink:#17120E;           /* 近黒 (純黒を使わない) */
  --body:#4A4239;          /* 本文グレー (BM #4a4a4a 系) */
  --mute:#94897D;          /* 微小ラベル */
  --faint:#B8AE9F;
  --rule:#E8E1D6;          /* ヘアライン罫 */
  --rule-strong:#CDC3B4;
  --red:#CC1400;           /* 単一アクセント (BM #db0c13 / NatGeo #fc4349 で裏打ち) */
  --red-deep:#9E0F00;
  --inner:1440px;
  --pad:clamp(20px,6vw,84px);    /* 大きな側余白 (Louvre 80px) */
  --gap:clamp(16px,1.6vw,26px);
  --e:cubic-bezier(.22,.61,.36,1);
  --photo:cubic-bezier(.16,1,.3,1);
  --fs:1;
  --f:"Noto Sans JP","Hiragino Sans",-apple-system,BlinkMacSystemFont,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f);
  font-size:calc(16px*var(--fs));line-height:1.85;letter-spacing:.012em;
  font-feature-settings:"palt";-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overscroll-behavior-y:none;-webkit-tap-highlight-color:transparent}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--red);color:#fff}
ruby{ruby-align:center}
rt{font-size:.52em;color:var(--mute);font-weight:400;letter-spacing:0}
body[data-ruby="off"] rt{visibility:hidden;font-size:1px}

.kicker{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--mute);text-transform:uppercase;
  display:inline-flex;align-items:center;gap:10px}
.kicker::before{content:"";width:22px;height:2px;background:var(--red);flex:none}
.tick{display:inline-block;width:3px;height:13px;background:var(--rule-strong);border-radius:1px;vertical-align:-1px;margin-right:7px}
.tick.cultural{background:#A9612E}.tick.natural{background:#2E7D4F}.tick.mixed{background:#C28A1B}

@keyframes fadeup{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
@keyframes fadein{from{opacity:0}to{opacity:1}}
@keyframes kb{0%{transform:scale(1.02)}100%{transform:scale(1.12)}}

/* ---------------- top bar ---------------- */
.topbar{position:fixed;top:0;left:0;right:0;z-index:60;height:64px;display:flex;align-items:center;
  padding:0 var(--pad);transition:background .35s var(--e),border-color .35s;border-bottom:1px solid transparent}
.topbar.solid{background:rgba(255,255,255,.94);backdrop-filter:saturate(1.2) blur(18px);border-bottom-color:var(--rule)}
.brand{display:flex;align-items:baseline;gap:12px}
.brand .mark{font-weight:900;font-size:24px;letter-spacing:.06em;color:#fff;text-shadow:0 1px 14px rgba(0,0,0,.45)}
.brand .mark b{color:var(--red);font-weight:900}
.topbar.solid .brand .mark{color:var(--ink);text-shadow:none}
.brand .sub{font-size:10.5px;font-weight:500;letter-spacing:.2em;color:rgba(255,255,255,.78)}
.topbar.solid .brand .sub{color:var(--mute)}
.topbar .spacer{flex:1}
.txtbtn{height:42px;padding:0 16px;border:1px solid rgba(255,255,255,.45);border-radius:2px;background:transparent;
  color:#fff;cursor:pointer;font:inherit;font-size:12px;font-weight:700;letter-spacing:.08em;
  display:inline-flex;align-items:center;gap:8px;transition:.22s var(--e)}
.topbar.solid .txtbtn{border-color:var(--rule-strong);color:var(--ink)}
.txtbtn:hover{border-color:var(--red);color:var(--red)}

/* ---------------- hero (full-bleed photograph) ---------------- */
.hero{position:relative;height:100svh;min-height:600px;overflow:hidden;display:flex;align-items:flex-end;isolation:isolate;background:#15110d}
.hero-stage{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 2s var(--e)}
.hero-slide.on{opacity:1;animation:kb 18s ease-in-out alternate infinite}
.hero-scrim{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,rgba(0,0,0,.42) 0%,rgba(0,0,0,.04) 22%,rgba(0,0,0,0) 44%,rgba(0,0,0,.42) 74%,rgba(0,0,0,.84) 100%)}
.hero-inner{position:relative;z-index:2;width:100%;max-width:var(--inner);margin:0 auto;padding:0 var(--pad) clamp(48px,9vh,110px);color:#fff}
.hero .kicker{color:rgba(255,255,255,.86);animation:fadeup .7s var(--e) .1s both}
.hero h1{font-weight:900;font-size:clamp(40px,7.6vw,108px);line-height:1.04;letter-spacing:-.02em;margin:18px 0 0;
  max-width:16em;text-shadow:0 3px 34px rgba(0,0,0,.5);animation:fadeup .8s var(--e) .22s both}
.hero .lead{font-size:clamp(15px,1.7vw,19px);font-weight:400;line-height:1.8;color:rgba(255,255,255,.9);
  max-width:34em;margin:22px 0 30px;text-shadow:0 1px 16px rgba(0,0,0,.5);animation:fadeup .8s var(--e) .36s both}
.hero .segmented{animation:fadein .6s var(--e) .5s both}
.hero-credit{position:absolute;right:var(--pad);bottom:16px;z-index:3;font-size:10px;letter-spacing:.06em;
  color:rgba(255,255,255,.55);max-width:50%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.segmented{display:inline-flex;border:1px solid rgba(255,255,255,.4);border-radius:2px;overflow:hidden}
.segmented button{border:0;background:transparent;color:rgba(255,255,255,.9);cursor:pointer;font:inherit;
  font-weight:700;font-size:13px;letter-spacing:.04em;padding:13px 26px;min-height:48px;transition:.24s var(--e)}
.segmented button + button{border-left:1px solid rgba(255,255,255,.3)}
.segmented button[aria-selected="true"]{background:#fff;color:var(--red)}

/* ---------------- browse ---------------- */
.browse{position:relative;z-index:2;background:var(--bg);padding-top:clamp(48px,8vh,96px)}
.sec-head{max-width:var(--inner);margin:0 auto;padding:0 var(--pad);display:flex;align-items:flex-end;gap:24px;flex-wrap:wrap}
.sec-head .l{flex:1;min-width:260px}
.sec-eyebrow{font-size:11px;font-weight:700;letter-spacing:.18em;color:var(--red);text-transform:uppercase}
.sec-title{font-weight:900;font-size:clamp(28px,4.4vw,52px);line-height:1.1;letter-spacing:-.015em;margin:12px 0 0}
.sec-sub{color:var(--mute);font-size:14px;margin-top:10px;max-width:40em;line-height:1.8}
.count{font-size:12px;color:var(--mute);letter-spacing:.04em;font-variant-numeric:tabular-nums;white-space:nowrap;padding-bottom:6px}

.modebar{max-width:var(--inner);margin:clamp(28px,4vh,44px) auto 0;padding:0 var(--pad);display:flex;border-bottom:1px solid var(--rule)}
.modebar button{border:0;background:transparent;color:var(--mute);font:inherit;font-weight:700;font-size:13px;
  letter-spacing:.04em;padding:14px 4px;margin-right:30px;cursor:pointer;position:relative;min-height:46px;transition:color .2s}
.modebar button::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--e)}
.modebar button[aria-selected="true"]{color:var(--ink)}
.modebar button[aria-selected="true"]::after{transform:scaleX(1)}
.modebar button:hover{color:var(--ink)}
.mode-panel.hidden{display:none}
.mode-panel{max-width:var(--inner);margin:0 auto;padding:0 var(--pad)}

/* toolbar */
.toolbar{max-width:var(--inner);margin:24px auto 0;padding:0 var(--pad);display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.search{flex:1;min-width:240px;display:flex;align-items:center;gap:11px;background:var(--bg);
  border:1px solid var(--rule-strong);border-radius:2px;padding:0 16px;height:50px;transition:border-color .2s}
.search:focus-within{border-color:var(--red)}
.search input{border:0;outline:0;background:transparent;font:inherit;flex:1;color:var(--ink)}
.search input::placeholder{color:var(--faint)}
.search-icon{width:15px;height:15px;flex:none;position:relative;opacity:.6}
.search-icon::before{content:"";position:absolute;top:0;left:0;width:11px;height:11px;border:1.6px solid var(--mute);border-radius:50%}
.search-icon::after{content:"";position:absolute;bottom:0;right:0;width:2px;height:6px;border-radius:1px;background:var(--mute);transform:rotate(-45deg);transform-origin:top}
.chip{border:1px solid var(--rule-strong);background:var(--bg);border-radius:2px;padding:0 16px;height:50px;font:inherit;
  font-size:13px;font-weight:700;cursor:pointer;color:var(--body);display:inline-flex;align-items:center;gap:9px;transition:.2s var(--e)}
.chip .tick{margin:0}
.chip[aria-pressed="true"]{border-color:var(--ink);color:var(--ink)}
.chip:hover{border-color:var(--ink)}

/* criteria */
.criteria-bar{max-width:var(--inner);margin:20px auto 0;padding:0 var(--pad)}
.criteria-intro{font-size:14px;color:var(--body);line-height:1.85;max-width:46em;margin:0 0 18px}
.crit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule)}
.crit-chip{border:0;background:var(--bg);padding:16px;cursor:pointer;text-align:left;font:inherit;color:var(--ink);transition:background .2s;min-height:74px}
.crit-chip:hover{background:var(--soft)}
.crit-chip[aria-pressed="true"]{background:var(--ink);color:#fff}
.crit-chip .ck{font-weight:900;font-size:18px;color:var(--red);display:block;margin-bottom:5px}
.crit-chip[aria-pressed="true"] .ck{color:#fff}
.crit-chip .cl{font-size:12.5px;line-height:1.5;color:var(--body)}
.crit-chip[aria-pressed="true"] .cl{color:rgba(255,255,255,.82)}
.crit-meaning{margin-top:18px;border-left:3px solid var(--red);background:var(--soft);padding:16px 20px;font-size:14.5px;line-height:1.8;color:var(--ink);animation:fadeup .3s var(--e)}
.crit-meaning b{color:var(--red)}
.crit-clear{margin-top:10px;border:0;background:transparent;color:var(--red);font:inherit;font-weight:700;font-size:13px;cursor:pointer;padding:4px 0}

/* ---------------- editorial photo grid ---------------- */
.grid{max-width:var(--inner);margin:clamp(32px,5vh,56px) auto clamp(80px,12vh,140px);padding:0 var(--pad);
  display:grid;grid-template-columns:repeat(12,1fr);column-gap:var(--gap);row-gap:clamp(34px,4vw,56px)}
.card{grid-column:span 4;cursor:pointer;opacity:0;transform:translateY(20px);transition:opacity .7s var(--e),transform .7s var(--e)}
.card.shown{opacity:1;transform:none}
.card .frame{position:relative;overflow:hidden;aspect-ratio:3/4;background:var(--soft-2);border-radius:2px}
.card .frame-img{position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;transform:scale(1.02);transition:opacity 1.1s var(--e),transform 1.2s var(--photo)}
.card .frame-img.ready{opacity:1;transform:scale(1)}
.card .cap{padding-top:14px}
.card .cap .k{font-size:10.5px;font-weight:700;letter-spacing:.12em;color:var(--mute);text-transform:uppercase;
  display:flex;align-items:center;gap:7px;margin-bottom:6px}
.card .cap .t{font-size:clamp(15px,1.15vw,18px);font-weight:700;line-height:1.42;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  background-image:linear-gradient(var(--red),var(--red));background-size:0% 1.5px;background-repeat:no-repeat;background-position:0 100%;
  transition:background-size .4s var(--e)}
@media(hover:hover){
  .card:hover .frame-img.ready{transform:scale(1.05)}
  .card:hover .cap .t{background-size:100% 1.5px}
}
.card:focus-visible{outline:2px solid var(--red);outline-offset:4px}
.card.feat{grid-column:span 12}
.card.feat .frame{aspect-ratio:21/9}
.card.feat .cap{padding-top:16px;max-width:42em}
.card.feat .cap .t{font-size:clamp(20px,2.4vw,30px)}
.card.half{grid-column:span 6}
.card.half .frame{aspect-ratio:4/3}

@media(max-width:980px){
  .grid{grid-template-columns:repeat(6,1fr)}
  .card{grid-column:span 3}
  .card.half{grid-column:span 6}
}
@media(max-width:560px){
  .grid{grid-template-columns:repeat(2,1fr);row-gap:30px}
  .card,.card.half{grid-column:span 1}
  .card.feat{grid-column:span 2}
  .card .frame{aspect-ratio:4/5}
}

/* ---------------- map (1 mode, demoted) ---------------- */
#map{height:62vh;min-height:380px;margin:24px 0 0;border:1px solid var(--rule);border-radius:2px;overflow:hidden;position:relative;z-index:0;isolation:isolate}
.leaflet-container{background:var(--soft);font-family:inherit}
.leaflet-control-attribution{font-size:10px!important}

/* ---------------- detail (immersive photo essay) ---------------- */
.detail{position:fixed;inset:0;z-index:80;background:var(--bg);overflow-y:auto;-webkit-overflow-scrolling:touch;
  transform:translateY(100%);transition:transform .55s var(--photo)}
.detail.open{transform:none}
.detail.closing{transform:translateY(100%);transition:transform .4s var(--e)}
.dtopbar{position:sticky;top:0;z-index:6;display:flex;align-items:center;gap:14px;height:60px;padding:0 var(--pad);
  background:linear-gradient(rgba(0,0,0,.55),rgba(0,0,0,0));transition:background .3s}
.detail.scrolled .dtopbar{background:rgba(255,255,255,.95);backdrop-filter:blur(16px);border-bottom:1px solid var(--rule)}
.backbtn{display:inline-flex;align-items:center;gap:10px;border:1px solid rgba(255,255,255,.5);background:rgba(0,0,0,.18);
  backdrop-filter:blur(8px);color:#fff;font:inherit;font-weight:700;font-size:13px;letter-spacing:.04em;
  padding:0 18px;height:42px;border-radius:2px;cursor:pointer;transition:.2s var(--e)}
.detail.scrolled .backbtn{border-color:var(--rule-strong);background:var(--bg);color:var(--ink)}
.backbtn:hover{border-color:var(--red);color:var(--red)}
.backbtn .arw{width:13px;height:2px;background:currentColor;position:relative;flex:none}
.backbtn .arw::before{content:"";position:absolute;left:0;top:-3px;width:7px;height:2px;background:currentColor;transform:rotate(-42deg);transform-origin:left}
.backbtn .arw::after{content:"";position:absolute;left:0;top:3px;width:7px;height:2px;background:currentColor;transform:rotate(42deg);transform-origin:left}
.dtopbar .dt{font-weight:700;font-size:13px;color:var(--ink);letter-spacing:.03em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:0;transition:opacity .3s}
.detail.scrolled .dtopbar .dt{opacity:1}

.gallery{position:relative;background:#0d0a07;margin-top:-60px}
.gallery .track{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch;height:86svh;max-height:880px}
.gallery .track::-webkit-scrollbar{display:none}
.gallery .slide{flex:0 0 100%;scroll-snap-align:center;position:relative;background-size:cover;background-position:center}
.gallery .slide img{width:100%;height:100%;object-fit:cover;cursor:zoom-in;opacity:0;transition:opacity 1s var(--e)}
.gallery .slide img.ready{opacity:1}
.gallery .vscrim{position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(0,0,0,.2),rgba(0,0,0,0) 30%,rgba(0,0,0,0) 50%,rgba(0,0,0,.8) 100%)}
.gallery .titleover{position:absolute;left:0;right:0;bottom:0;z-index:3;max-width:var(--inner);margin:0 auto;padding:0 var(--pad) clamp(28px,5vh,56px);color:#fff;pointer-events:none}
.gallery .titleover .cat{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.86);display:inline-flex;align-items:center;gap:9px}
.gallery .titleover .cat::before{content:"";width:22px;height:2px;background:var(--red)}
.gallery .titleover h2{font-weight:900;font-size:clamp(30px,6vw,68px);line-height:1.06;letter-spacing:-.02em;margin:14px 0 0;text-shadow:0 3px 30px rgba(0,0,0,.55)}
.gallery .titleover .en{font-size:clamp(13px,1.5vw,17px);color:rgba(255,255,255,.8);margin-top:10px;letter-spacing:.02em}
.gallery .dots{position:absolute;bottom:18px;right:var(--pad);display:flex;gap:6px;z-index:4}
.gallery .dots i{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.45);transition:width .3s var(--e),background .3s}
.gallery .dots i.on{background:#fff;width:20px;border-radius:3px}
.gallery .gcredit{position:absolute;bottom:16px;left:var(--pad);z-index:4;font-size:10px;color:rgba(255,255,255,.6);cursor:pointer;max-width:46%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.dbody{max-width:760px;margin:0 auto;padding:clamp(44px,7vh,80px) var(--pad) 130px}
.placecard{border:1px solid var(--rule);border-radius:2px;overflow:hidden;margin:0 0 clamp(36px,6vh,56px)}
.placecard .pc-head{display:flex;gap:14px;align-items:baseline;flex-wrap:wrap;padding:16px 18px;border-bottom:1px solid var(--rule)}
.placecard .crumb{font-weight:700;font-size:14px;color:var(--ink);letter-spacing:.02em}
.placecard .crumb .sep{color:var(--faint);margin:0 8px;font-weight:400}
.placecard .crumb .here{color:var(--red)}
.placecard .pc-k{flex:1 0 100%;font-size:10.5px;font-weight:700;letter-spacing:.16em;color:var(--red);text-transform:uppercase;margin-bottom:2px}
.placecard .coord{margin-left:auto;font-size:11.5px;color:var(--mute);font-variant-numeric:tabular-nums;letter-spacing:.03em}
.pc-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule)}
.pc-world{background:var(--bg);display:flex;align-items:center;justify-content:center;padding:16px 18px}
.worldsvg{width:100%;height:auto;display:block}
.worldsvg .grat{stroke:var(--rule);stroke-width:.3}
.worldsvg .land{fill:var(--soft-2);stroke:var(--rule-strong);stroke-width:.22}
.worldsvg .cross{stroke:var(--red);stroke-width:.4;stroke-dasharray:2 2;opacity:.45}
.worldsvg .ring{fill:none;stroke:var(--red);stroke-width:.9;opacity:.7;animation:locpulse 2.4s ease-out infinite}
.worldsvg .pin{fill:var(--red)}
@keyframes locpulse{0%{r:3;opacity:.9}70%{r:11;opacity:0}100%{r:11;opacity:0}}
.pc-map{min-height:220px;background:var(--soft)}
@media(max-width:620px){.pc-grid{grid-template-columns:1fr}.pc-map{min-height:200px}}
.hook{font-weight:700;font-size:clamp(20px,2.8vw,28px);line-height:1.6;color:var(--ink);letter-spacing:-.01em;margin:0 0 8px}
.wow{margin:clamp(30px,5vh,44px) 0;border-top:2px solid var(--red);background:var(--soft);padding:24px 26px}
.wow .lab{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--red);text-transform:uppercase;margin-bottom:12px}
.wow .b{font-size:17px;line-height:1.95;color:var(--ink)}
.dsec{margin-top:clamp(40px,6vh,64px)}
.dsec-h{font-weight:900;font-size:clamp(21px,3vw,30px);line-height:1.3;letter-spacing:-.01em;margin:0 0 16px;display:flex;align-items:center;gap:12px}
.dsec-h::before{content:"";width:24px;height:3px;background:var(--red);flex:none}
.dsec-b{font-size:17px;line-height:2.0;color:var(--body)}
.dsec-b p{margin:0 0 1.2em}
.dsec-b strong{color:var(--ink);font-weight:700}
.dsec-b .dsub{font-weight:700;font-size:clamp(16px,1.5vw,19.5px);color:var(--ink);line-height:1.5;letter-spacing:-.01em;
  margin:1.9em 0 .65em;padding-left:13px;border-left:3px solid var(--rule-strong)}
.dsec-b .dsub:first-child{margin-top:0}
body[data-read="kids"] .dsec-b .dsub{font-size:clamp(17px,1.6vw,20.5px)}
.lead-b{font-size:19px;line-height:1.95;color:var(--ink);font-weight:400;margin:0}
.bodyfig{margin:clamp(36px,6vh,56px) 0;background:#0d0a07}
.dbody .bodyfig{margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);width:100vw}
.bodyfig img{width:100%;max-height:82vh;object-fit:cover;cursor:zoom-in}
.bodyfig figcaption{max-width:760px;margin:0 auto;padding:10px var(--pad) 0;font-size:11.5px;color:var(--mute);line-height:1.5}
.crit-row{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 16px}
.crit-b{font-weight:700;font-size:14px;border:1px solid var(--red);color:var(--red);border-radius:2px;padding:5px 13px;letter-spacing:.03em}
.galgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:4px;margin:4px 0}
.galcell{aspect-ratio:1/1;border:0;border-radius:2px;background-size:cover;background-position:center;background-color:var(--soft-2);cursor:zoom-in;transition:opacity .25s}
@media(hover:hover){.galcell:hover{opacity:.86}}
.cmp{display:flex;flex-direction:column;border-top:1px solid var(--rule)}
.cmp .row{padding:18px 0;border-bottom:1px solid var(--rule)}
.cmp .row .w{font-weight:700;font-size:15px;color:var(--ink);margin-bottom:6px;display:flex;align-items:center;gap:9px}
.cmp .row .w::before{content:"";width:16px;height:2px;background:var(--red);flex:none}
.cmp .row .p{font-size:15.5px;line-height:1.85;color:var(--body)}
.gloss{display:flex;flex-direction:column;border-top:1px solid var(--rule)}
.gloss .g{padding:15px 0;border-bottom:1px solid var(--rule)}
.gloss .g .term{font-weight:700;color:var(--ink)}
.gloss .g .read{color:var(--mute);font-size:12px;margin-left:8px}
.gloss .g .def{font-size:14.5px;color:var(--body);margin-top:4px;line-height:1.8}
.sources{margin-top:clamp(40px,6vh,56px)}
.sources ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.sources li{padding:12px 0;border-bottom:1px solid var(--rule);font-size:14px}
.sources a{color:var(--red);border-bottom:1px solid transparent;transition:border-color .2s}
.sources a:hover{border-bottom-color:var(--red)}
.prep{border:1px dashed var(--rule-strong);border-radius:2px;padding:30px;text-align:center;color:var(--mute);font-size:15px;line-height:1.85}

/* ---------------- lightbox ---------------- */
.lightbox{position:fixed;inset:0;z-index:95;background:rgba(8,6,4,.98);display:none;align-items:center;justify-content:center;touch-action:none}
.lightbox.open{display:flex;animation:fadein .2s var(--e) both}
.lightbox img{max-width:100%;max-height:94vh;object-fit:contain;transform-origin:center;will-change:transform;user-select:none;-webkit-user-drag:none}
.lb-close{position:absolute;top:16px;right:16px;z-index:2;height:42px;padding:0 18px;border:1px solid rgba(255,255,255,.5);
  background:transparent;color:#fff;font:inherit;font-weight:700;font-size:13px;letter-spacing:.06em;border-radius:2px;cursor:pointer}
.lb-close:hover{border-color:var(--red);color:var(--red)}
.lb-credit{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:rgba(255,255,255,.7);font-size:11px;padding:0 24px;cursor:pointer}
.lb-hint{position:absolute;top:18px;left:0;right:0;text-align:center;color:rgba(255,255,255,.35);font-size:11px;letter-spacing:.1em}

/* ---------------- settings sheet ---------------- */
.sheet-bg{position:fixed;inset:0;z-index:90;background:rgba(20,15,10,.42);opacity:0;pointer-events:none;transition:.3s}
.sheet-bg.open{opacity:1;pointer-events:auto}
.sheet{position:fixed;z-index:91;right:0;top:0;bottom:0;width:min(400px,92vw);background:var(--bg);
  box-shadow:-20px 0 60px rgba(20,15,10,.18);transform:translateX(100%);transition:transform .42s var(--photo);
  padding:26px var(--pad);overflow-y:auto;border-left:1px solid var(--rule)}
.sheet.open{transform:none}
.sheet-head{display:flex;align-items:center;gap:14px;margin-bottom:8px}
.sheet-head h3{flex:1;margin:0;font-size:20px;font-weight:900;letter-spacing:-.01em}
.field{margin:0 0 26px;border-top:1px solid var(--rule);padding-top:22px}
.field>label{font-weight:700;display:block;margin-bottom:13px;font-size:14px}
.field .hint{font-size:11.5px;color:var(--mute);font-weight:400;margin-left:8px}
.toggle{display:inline-flex;border:1px solid var(--rule-strong);border-radius:2px;overflow:hidden}
.toggle button{border:0;background:transparent;font:inherit;font-weight:700;font-size:13px;padding:11px 24px;cursor:pointer;color:var(--body);min-height:46px}
.toggle button + button{border-left:1px solid var(--rule-strong)}
.toggle button[aria-selected="true"]{background:var(--ink);color:#fff}
input[type=range]{width:100%;accent-color:var(--red);height:32px}
.gradeopts{display:flex;gap:7px;flex-wrap:wrap}
.gradeopts button{border:1px solid var(--rule-strong);background:var(--bg);color:var(--ink);border-radius:2px;padding:10px 15px;font:inherit;font-weight:700;font-size:13px;cursor:pointer;min-height:46px}
.gradeopts button[aria-selected="true"]{background:var(--red);border-color:var(--red);color:#fff}
.sheet .note{font-size:11.5px;color:var(--mute);line-height:1.85;margin-top:8px}

/* ---------------- read mode (大人 / 子ども) ---------------- */
body[data-read="kids"]{--fs:1.12}
body[data-read="adult"]{--fs:1.04}
body[data-read="kids"] .dsec-b,body[data-read="kids"] .wow .b,body[data-read="kids"] .lead-b{font-size:18.5px;line-height:2.05}

.hidden{display:none!important}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .card{opacity:1;transform:none}
  .hero-slide.on{animation:none}
  .card .frame-img,.gallery .slide img{opacity:1;transform:none}
}