/* シームレステクスチャ工房
   建材の見本帳。地は生成りの厚紙、罫は墨の細線、有彩色は墨出しの朱だけ。
   色を正しく判断できるよう、プレビューの周りは無彩色の中間グレーにする。
   角は四角く、影は使わない。 */
:root{
  --paper:#efeee9;
  --paper2:#e6e4dd;
  --ink:#191917;
  --sub:#5c5b55;
  --faint:#8f8d85;
  --line:#c8c6bd;
  --well:#808180;      /* プレビューの周囲。ほぼ中間グレー */
  --red:#d33b14;
  --sans:"Zen Kaku Gothic New","Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --ease:cubic-bezier(.2,.8,.2,1);
}
[hidden]{display:none !important}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:13px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overscroll-behavior:none}
button{font:inherit;color:inherit;touch-action:manipulation;background:none;border:0;cursor:pointer}
a{color:inherit}
:focus-visible{outline:2px solid var(--red);outline-offset:1px}
.mono{font-family:var(--mono);font-size:11.5px;letter-spacing:-.01em}
.lab{font-size:11.5px;color:var(--sub);white-space:nowrap}
.note{font-size:11px;line-height:1.7;color:var(--sub)}

/* ── 全体の配置 ───────────────────
   PC：元画像｜仕上がり｜設定 の3列で画面に収める。
   狭い画面：仕上がり→元画像→設定 の順に1列で、ページ全体がスクロールする。 */
#app{display:grid;grid-template-columns:minmax(0,1fr);grid-template-areas:"top" "stage" "src" "panel"}
#top{grid-area:top}
#srcPane{grid-area:src;min-width:0}
#stage{grid-area:stage;min-width:0;display:flex;flex-direction:column}
#panel{grid-area:panel;min-width:0;display:flex;flex-direction:column}
@media (min-width:1080px){
  html,body{height:100%;overflow:hidden}
  #app{height:100vh;height:100dvh;grid-template-columns:320px minmax(0,1fr) 304px;grid-template-rows:auto minmax(0,1fr);
    grid-template-areas:"top top top" "src stage panel"}
  #srcPane{overflow-y:auto;border-right:1px solid var(--ink)}
  #panel{border-left:1px solid var(--ink);min-height:0}
  #stage{min-height:0}
  .p-scroll{flex:1 1 auto;min-height:0;overflow-y:auto}
  #viewWrap{flex:1 1 auto;min-height:0}
}
@media (max-width:1079.98px){
  #viewWrap{height:min(62vh,100vw);min-height:300px}
  #srcPane{border-top:1px solid var(--ink)}
  #panel{border-top:1px solid var(--ink)}
  .savebar{position:sticky;bottom:0;z-index:5;padding-bottom:calc(10px + env(safe-area-inset-bottom))}
}

/* ── 見出し ─────────────────── */
#top{display:flex;align-items:center;gap:10px;padding:8px 14px;border-bottom:1px solid var(--ink);
  padding-left:calc(14px + env(safe-area-inset-left));padding-right:calc(14px + env(safe-area-inset-right))}
#top .mark{flex:none}
#top h1{font-size:18px;font-weight:900;letter-spacing:.08em;line-height:1.2;white-space:nowrap}
#top p{font-size:12px;color:var(--sub);min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
#top .btn{margin-left:auto;flex:none}
@media (max-width:560px){#top p{display:none}#top h1{font-size:15px;letter-spacing:.02em}}

/* ── 部品 ─────────────────── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--ink);background:var(--paper);
  padding:6px 12px;font-size:12.5px;font-weight:700;line-height:1.3;border-radius:1px;transition:background .12s,color .12s;white-space:nowrap}
.btn:hover{background:var(--paper2)}
.btn:active{background:var(--ink);color:var(--paper)}
.btn.mini{padding:4px 8px;font-size:11.5px;font-weight:500}
.btn.wide{width:100%;margin-top:8px}
.btn[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.btn:disabled{opacity:.4;cursor:default;background:var(--paper);color:var(--ink)}
.btn.key{background:var(--ink);color:var(--paper);padding:11px 14px;font-size:14px;width:100%}
.btn.key:hover{background:#34342f}
.btn.key:disabled{background:var(--ink);color:var(--paper);opacity:.35}

.seg{display:flex;border:1px solid var(--ink);border-radius:1px;min-width:0}
.seg button{flex:1 1 auto;padding:5px 6px;font-size:12px;line-height:1.35;border-left:1px solid var(--ink);min-width:0;white-space:nowrap;transition:background .12s,color .12s}
.seg button:first-child{border-left:0}
.seg button:hover{background:var(--paper2)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--paper);font-weight:700}
/* 5つを3＋2で並べる。空きマスを作らず、すき間1pxを地の色で線に見せる */
.seg.stack{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--ink)}
.seg.stack button{grid-column:span 2;border-left:0;background:var(--paper)}
.seg.stack button:nth-child(n+4){grid-column:span 3}
.seg.stack button:hover{background:var(--paper2)}
.seg.stack button[aria-pressed="true"]{background:var(--ink)}

input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:22px;background:none;cursor:pointer;margin:0;touch-action:none}
input[type=range]::-webkit-slider-runnable-track{height:1px;background:var(--ink)}
input[type=range]::-moz-range-track{height:1px;background:var(--ink)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:9px;height:17px;margin-top:-8px;background:var(--ink);border:0;border-radius:0}
input[type=range]::-moz-range-thumb{width:9px;height:17px;background:var(--ink);border:0;border-radius:0}

.check{display:inline-flex;align-items:center;gap:6px;font-size:12px;cursor:pointer;margin-right:10px}
.check input{appearance:none;-webkit-appearance:none;width:14px;height:14px;border:1px solid var(--ink);background:var(--paper);flex:none;cursor:pointer;display:grid;place-content:center}
.check input:checked{background:var(--ink)}
.check input:checked::after{content:"";width:6px;height:6px;background:var(--paper)}

/* ── 元画像 ─────────────────── */
.pane-head{display:flex;align-items:baseline;justify-content:space-between;gap:8px;padding:10px 14px 6px}
.pane-head h2{font-size:12.5px;font-weight:700}
.pane-head .mono{color:var(--sub)}
#srcWrap{position:relative;margin:0 14px;background:var(--well);min-height:170px;display:flex;align-items:center;justify-content:center;overflow:hidden}
#srcCv{display:block;touch-action:pan-y;cursor:crosshair;max-width:100%}
#srcEmpty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;padding:16px;color:#fff;font-size:12px}
.src-tools{padding:10px 14px 16px;display:flex;flex-direction:column;gap:8px}
.src-tools .row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
#cands{flex:0 0 auto}
#cands button{min-width:30px;font-family:var(--mono)}
#srcTool{flex:1 1 auto}

/* ── 仕上がり ─────────────────── */
#viewTools{display:flex;align-items:center;gap:10px 14px;flex-wrap:wrap;padding:8px 12px;border-bottom:1px solid var(--ink)}
#viewMode{flex:0 0 auto}
#viewMode button{padding:4px 12px}
.zoom{display:flex;align-items:center;gap:8px;flex:1 1 180px;min-width:140px;max-width:320px}
.zoom .mono{min-width:30px;text-align:right}
.toggles{display:flex;gap:4px;flex-wrap:wrap}
#brushBar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:6px 12px;border-bottom:1px solid var(--ink);background:var(--paper2)}
#brushBar input{width:120px;flex:0 1 120px}
#viewWrap{position:relative;background:var(--well);overflow:hidden}
#view,#strokeCv{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:pan-y}
#view{cursor:grab}
#view.dragging{cursor:grabbing}
#view.brush{cursor:none}
#view.squint{filter:blur(7px);transform:scale(1.04)}
#strokeCv{pointer-events:none}
#ring{position:absolute;border:1px solid #fff;outline:1px solid #000;border-radius:50%;pointer-events:none;transform:translate(-50%,-50%)}
#working{position:absolute;right:10px;top:10px;background:var(--ink);color:var(--paper);font-size:11px;padding:2px 8px}

#drop{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;text-align:center;padding:20px;
  color:#fff;cursor:pointer;background:var(--well);border:0}
#drop strong{font-size:20px;font-weight:700;letter-spacing:.04em}
#drop>span{font-size:12px;line-height:1.8;max-width:460px}
#drop.over{background:#6a6b6a}
.samples{display:flex;align-items:center;gap:6px;margin-top:10px;flex-wrap:wrap;justify-content:center}
.samples .lab{color:#fff}
.samples .btn{border-color:#fff;background:transparent;color:#fff}
.samples .btn:hover{background:#fff;color:var(--ink)}

#meter{border-top:1px solid var(--ink);padding:7px 12px;display:flex;align-items:center;gap:6px 16px;flex-wrap:wrap}
.m-score{display:flex;align-items:center;gap:8px;flex:none}
.m-num{font-size:14px;font-weight:600;min-width:24px;text-align:right}
.m-bar{display:block;width:90px;height:7px;border:1px solid var(--ink)}
.m-bar i{display:block;height:100%;background:var(--ink);width:0;transition:width .3s var(--ease)}
.m-hint{font-size:11.5px;color:var(--sub);min-width:0;flex:1 1 240px;line-height:1.5}

/* ── 設定 ─────────────────── */
.grp{border-bottom:1px solid var(--ink);padding:0 14px}
.grp summary{list-style:none;cursor:pointer;padding:10px 18px 10px 0;font-size:12.5px;font-weight:700;position:relative;display:flex;justify-content:space-between;gap:8px}
.grp summary::-webkit-details-marker{display:none}
.grp summary::after{content:"+";position:absolute;right:0;top:9px;font-family:var(--mono);font-weight:400}
.grp[open] summary::after{content:"-"}
.grp .now{font-weight:400;color:var(--sub);font-size:11.5px}
.grp[open]{padding-bottom:14px}
.grp>.note{margin-top:7px}
.field{margin-top:12px}
.field:first-of-type{margin-top:4px}
.f-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px;font-size:12px;margin-bottom:3px}
.f-head .mono{color:var(--sub)}
.field .note{margin-top:5px}
.field .check{margin-top:3px}
.slider{margin-top:8px}
.slider .f-head{margin-bottom:0}
.slider .desc{font-size:11px;color:var(--sub);line-height:1.6;margin-top:-1px}
.pfoot{padding:14px;display:flex;flex-direction:column;gap:6px}
.flinks{font-size:11px;color:var(--sub);display:flex;flex-wrap:wrap;gap:0 6px}
.flinks .sep{color:var(--line)}
.savebar{flex:none;background:var(--paper);border-top:1px solid var(--ink);padding:10px 14px;display:flex;flex-direction:column;gap:6px}
.save-sum{color:var(--sub);min-height:1em}
#saveProg{position:relative;height:18px;border:1px solid var(--ink)}
#saveProg i{position:absolute;left:0;top:0;bottom:0;background:var(--ink);width:0}
#saveProg span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:10.5px;color:#fff;mix-blend-mode:difference}

/* ── 保存モーダル（タッチ端末）。IMAGE_SAVE_UX 準拠 ── */
#saveModal{position:fixed;inset:0;z-index:90;background:rgba(25,25,23,.55);overflow-y:auto;overscroll-behavior:contain;
  display:flex;align-items:flex-start;justify-content:center;padding:calc(16px + env(safe-area-inset-top)) 14px calc(16px + env(safe-area-inset-bottom));
  opacity:0;transition:opacity .18s}
#saveModal.open{opacity:1}
.sm-card{background:var(--paper);border:1px solid var(--ink);width:min(520px,100%);padding:14px;opacity:0;transform:translateY(8px);transition:opacity .2s,transform .24s var(--ease)}
#saveModal.open .sm-card{opacity:1;transform:none}
.sm-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.sm-head span{font-size:14px;font-weight:700}
.sm-preview{display:flex;align-items:center;justify-content:center;background:var(--well);padding:10px}
.sm-preview img{max-width:100%;max-height:min(62vh,640px);width:auto;height:auto;object-fit:contain;display:block;-webkit-touch-callout:default}
/* 複数枚：2列に並べ、どれも長押しできる大きさを保つ。収まらなければオーバーレイごとスクロール */
.sm-card.multi{display:flex;flex-direction:column}
.sm-card.multi .sm-head{order:-3}
.sm-card.multi .sm-acts{order:-2;margin:0 0 4px}
.sm-card.multi .sm-note{order:-1;margin:0 0 10px}
.sm-preview.multi{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;align-items:start}
.sm-preview.multi figure{margin:0;min-width:0}
.sm-preview.multi img{width:100%;max-height:none;aspect-ratio:auto}
.sm-preview.multi figcaption{font-family:var(--mono);font-size:10.5px;color:#f2f1ec;margin-top:3px;letter-spacing:.04em}
.sm-note{font-size:11.5px;color:var(--sub);line-height:1.8;margin-top:10px}
.sm-acts{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.sm-acts .btn{flex:1 1 auto;padding:10px 12px;width:auto;font-size:13px}

#toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom));transform:translate(-50%,10px);background:var(--ink);color:var(--paper);
  font-size:12.5px;padding:7px 14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s var(--ease);z-index:100;max-width:calc(100vw - 28px)}
#toast.show{opacity:1;transform:translate(-50%,0)}

@media (prefers-reduced-motion:reduce){
  .sm-card,#saveModal,#toast,.m-bar i{transition:none}
}