:root{--bg:#eef9fb;--panel:#fff;--ink:#304052;--muted:#6d7c89;--line:#d9edf3;--accent:#27b7cc;--danger:#e06478;--shadow:0 16px 42px rgba(31,87,106,.13);--radius:22px}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:linear-gradient(135deg,#fdf7d9 0,#eafaff 36%,#f9f0ff 100%);color:var(--ink)}button,input,select{font:inherit}button{border:0;cursor:pointer}.shell{width:min(1240px,calc(100% - 22px));margin:0 auto;padding:22px 0 42px}.panel{background:rgba(255,255,255,.9);border:1px solid rgba(255,255,255,.8);border-radius:var(--radius);box-shadow:var(--shadow);backdrop-filter:blur(10px)}.hero{padding:22px;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:16px}.eyebrow,.section-kicker{margin:0 0 6px;color:#1398aa;font-weight:900;letter-spacing:.04em}.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.05;margin:0 0 10px}.lead{margin:0;color:#536574;line-height:1.8}.nav{display:flex;gap:10px;flex-wrap:wrap}.nav a{display:inline-flex;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:999px;padding:10px 13px;font-weight:800;color:#3f727b}.layout{display:grid;grid-template-columns:minmax(0,1.05fr) 430px;gap:16px}.stage-panel,.control-panel,.pieces-panel,.share-panel{padding:18px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:12px}.panel-head h2,.panel-head h3{margin:0}.compact{margin-bottom:12px}.pill{display:inline-flex;border-radius:999px;padding:8px 12px;background:#edf7fa;color:#32838e;font-weight:900}.stage-meta{border:1px solid var(--line);border-radius:16px;padding:12px;background:#f8fdff;margin-bottom:12px}.stage-meta strong{display:block}.stage-meta span{display:block;color:var(--muted);font-size:14px;margin-top:4px}.bar{height:10px;border-radius:999px;background:#e5f1f5;overflow:hidden;margin-top:10px}.bar i{display:block;height:100%;width:0%;background:linear-gradient(90deg,#26b8ca,#ffabd3);border-radius:inherit}.canvas-wrap{position:relative;border-radius:18px;overflow:hidden;background:#d9f8ff;border:1px solid var(--line);display:grid;place-items:center}.canvas-wrap canvas{display:block;max-width:100%;height:auto;background:#eaf9ff;touch-action:manipulation}.empty{position:absolute;inset:0;display:grid;place-items:center;text-align:center;color:#6b8190;background:linear-gradient(135deg,#edfaff,#fff8dd)}.empty strong{display:block;font-size:22px}.empty span{display:block;margin-top:8px}.empty.hidden{display:none}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}.metrics article{background:#f8fdff;border:1px solid var(--line);border-radius:16px;padding:12px;text-align:center}.metrics span{display:block;color:var(--muted);font-size:13px}.metrics strong{font-size:25px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}.field{display:grid;gap:6px}.field.wide{grid-column:1/-1}.field span{font-size:13px;color:#4c6470;font-weight:900}input[type=file],select,input[type=text]{width:100%;border:1px solid var(--line);border-radius:13px;background:#fff;padding:11px 12px;color:var(--ink)}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.actions.two{grid-template-columns:1fr 1fr}.actions button{border-radius:14px;padding:12px;background:#edf7fa;color:#315b63;font-weight:900}.actions button.primary{background:linear-gradient(135deg,#25b8ca,#56dbe8);color:#fff}.actions button:disabled{opacity:.45;cursor:not-allowed}.note{font-size:13px;line-height:1.7;color:var(--muted);margin:12px 0 0}.preset-wrap{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.preset{background:#f6fbfd;border:1px solid var(--line);border-radius:999px;padding:8px 10px;font-size:12px;color:#4c6a73;font-weight:800}.pieces{display:grid;gap:8px;max-height:420px;overflow:auto;padding-right:4px}.piece{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center;border:1px solid var(--line);border-radius:15px;background:#fbfeff;padding:8px}.piece-num{width:34px;height:34px;border-radius:11px;background:#dff8fd;color:#15899a;display:grid;place-items:center;font-weight:1000}.piece.open .piece-num{background:#e8fff1;color:#28965a}.piece button{border-radius:12px;padding:10px 12px;font-weight:900;background:#edf7fa;color:#315b63}.piece.open button{background:#fff0f3;color:#be4c63}.share-box{white-space:pre-wrap;line-height:1.7;border:1px solid var(--line);border-radius:16px;background:#f8fdff;padding:13px;color:#445f6b;min-height:112px}@media(max-width:980px){.hero{display:block}.nav{margin-top:14px}.layout{grid-template-columns:1fr}.side{display:grid;gap:16px}.pieces{max-height:none}}@media(max-width:560px){.fields,.actions,.actions.two,.metrics{grid-template-columns:1fr}.shell{width:min(100% - 14px,1240px);padding-top:12px}.hero,.stage-panel,.control-panel,.pieces-panel,.share-panel{padding:14px;border-radius:18px}.piece{grid-template-columns:auto 1fr}.piece button{grid-column:1/-1}}
.file-field input[type=file]{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.file-pick-btn{display:flex;align-items:center;justify-content:center;min-height:46px;border:1px solid rgba(255,255,255,.55);border-radius:14px;background:linear-gradient(135deg,#fff8db,#bff3fb);box-shadow:0 10px 26px rgba(31,87,106,.12);color:#49626d;font-weight:1000;cursor:pointer}.file-pick-btn::before{content:'🖼️';margin-right:8px}.file-name{font-size:12px;color:#6d7c89;line-height:1.5;word-break:break-all;background:#f8fdff;border:1px solid var(--line);border-radius:12px;padding:8px 10px}

/* 20260602 display compact fix: keep the work area visible at 100% browser zoom */
@media (min-width: 981px){
  .shell{
    width:min(1120px,calc(100% - 18px));
    padding:10px 0 18px;
  }
  .hero{
    padding:14px 18px;
    margin-bottom:10px;
    align-items:center;
  }
  .hero h1{
    font-size:clamp(26px,3.2vw,38px);
    margin-bottom:0;
  }
  .eyebrow,.section-kicker{
    margin-bottom:3px;
  }
  .nav a{
    padding:8px 11px;
  }
  .layout{
    grid-template-columns:minmax(420px,560px) 390px;
    gap:12px;
    align-items:start;
    justify-content:center;
  }
  .stage-panel,.control-panel,.pieces-panel,.share-panel{
    padding:13px;
  }
  .panel-head{
    margin-bottom:8px;
  }
  .panel-head h2,.panel-head h3{
    font-size:20px;
  }
  .stage-meta{
    padding:9px 11px;
    margin-bottom:8px;
  }
  .stage-meta span{
    font-size:13px;
    margin-top:2px;
  }
  .bar{
    height:7px;
    margin-top:7px;
  }
  .canvas-wrap{
    max-height:calc(100vh - 276px);
    min-height:260px;
  }
  .canvas-wrap canvas{
    max-height:calc(100vh - 276px);
    width:auto;
    max-width:100%;
  }
  .metrics{
    gap:8px;
    margin-top:8px;
  }
  .metrics article{
    padding:8px;
  }
  .metrics strong{
    font-size:21px;
  }
  .fields{
    gap:8px;
  }
  input[type=file],select,input[type=text]{
    padding:9px 10px;
  }
  .actions{
    gap:8px;
    margin-top:9px;
  }
  .actions button{
    padding:10px;
  }
  .preset-wrap{
    gap:6px;
    margin-bottom:8px;
  }
  .preset{
    padding:7px 9px;
  }
  .pieces{
    max-height:calc(100vh - 510px);
  }
  .piece{
    padding:6px;
    gap:6px;
  }
  .piece-num{
    width:30px;
    height:30px;
  }
  .piece button{
    padding:8px 10px;
  }
  .share-box{
    min-height:92px;
    padding:10px;
    line-height:1.55;
    font-size:13px;
  }
}

@media (min-width: 981px) and (max-height: 760px){
  .shell{width:min(1040px,calc(100% - 14px));padding:7px 0 12px;}
  .hero{padding:10px 14px;margin-bottom:8px;}
  .hero h1{font-size:30px;}
  .layout{grid-template-columns:minmax(390px,500px) 370px;gap:10px;}
  .stage-panel,.control-panel,.pieces-panel,.share-panel{padding:10px;}
  .panel-head h2,.panel-head h3{font-size:18px;}
  .stage-meta{padding:7px 9px;}
  .canvas-wrap{max-height:calc(100vh - 232px);min-height:220px;}
  .canvas-wrap canvas{max-height:calc(100vh - 232px);}
  .metrics article{padding:6px;}
  .metrics strong{font-size:19px;}
  .pieces{max-height:calc(100vh - 455px);}
  .share-box{min-height:76px;}
}


/* 20260602 header width + X post button fix */
@media (min-width: 981px){
  .hero, .layout{
    width:min(962px,100%);
    margin-left:auto;
    margin-right:auto;
  }
  .hero{
    margin-bottom:10px;
  }
  .actions.one{
    grid-template-columns:1fr;
  }
}
@media (min-width: 981px) and (max-height: 760px){
  .hero, .layout{
    width:min(880px,100%);
  }
}