:root{
  --bg:#eceef1; --panel:#f8f9fa; --panel2:#e0e4e8; --line:#cfd4da;
  --fg:#1a1d21; --dim:#6d727a; --accent:#1a1d21; --accentfg:#ffffff;
  --r:12px;
  color-scheme:light dark;
}
/* 既定は「よぞら」。html側にもクラスを付けるのは、JSが走る前の一瞬だけ
   明るい地色が見えるのを防ぐため（html要素の背景と color-scheme に効かせる）。 */
html.paper,body.paper{ color-scheme:light }
html.night,body.night{ color-scheme:dark }
body.paper{
  --bg:#f4f2ec; --panel:#ffffff; --panel2:#eceadf; --line:#dcd7c8;
  --fg:#24272d; --dim:#7e7a6c; --accent:#24272d; --accentfg:#ffffff;
}
body.night{
  --bg:#0d1016; --panel:#161b24; --panel2:#1e2531; --line:#2c3444;
  --fg:#e8ecf3; --dim:#8d97a8; --accent:#ffcf5c; --accentfg:#1a1408;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
html{background:#eceef1}
html.paper{background:#f4f2ec}
html.night{background:#0d1016}
body{
  background:var(--bg) !important; color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;
  font-size:15px; line-height:1.6; -webkit-text-size-adjust:100%;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) calc(20px + env(safe-area-inset-bottom)) env(safe-area-inset-left);
  transition:background .3s,color .3s;
}
.wrap{max-width:520px;margin:0 auto;padding:14px 14px 40px}
header{display:flex;align-items:baseline;gap:10px;margin:2px 0 10px}
h1{font-size:20px;letter-spacing:.22em;margin:0;font-weight:600}
header .tag{font-size:11.5px;color:var(--dim);letter-spacing:.04em}
.board{position:relative;display:flex;justify-content:center}
canvas{display:block;touch-action:none;border-radius:50%}
.readout{display:flex;justify-content:center;gap:14px;font-variant-numeric:tabular-nums;
  font-size:12px;color:var(--dim);margin:10px 0 2px;letter-spacing:.06em}
.readout b{color:var(--fg);font-weight:600}
.hint{text-align:center;font-size:12px;color:var(--dim);min-height:1.6em;margin:2px 0 10px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
button,select{font-family:inherit;font-size:14px;color:var(--fg)}
.btn{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:10px 14px;cursor:pointer;transition:background .15s,border-color .15s,opacity .15s}
.btn:active{background:var(--panel2)}
.btn.on{background:var(--accent);border-color:var(--accent);color:var(--accentfg);font-weight:600}
.btn.wide{flex:1;text-align:center}
.btn.play{min-width:74px;font-size:16px}
.btn[disabled]{opacity:.32;cursor:default}
.btn.ico{padding:10px 12px;font-size:17px;line-height:1}
.pats{display:flex;gap:6px}
.pats .btn{width:40px;padding:10px 0;text-align:center;font-weight:600}
.pats .btn.has{border-color:var(--dim)}
.pats .btn.live{box-shadow:inset 0 0 0 2px var(--accent)}
.parts{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin:12px 0 8px}
.chip{display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r);padding:9px 8px;cursor:pointer;font-size:13px;transition:border-color .15s,opacity .15s}
.chip .dot{width:11px;height:11px;border-radius:3px;flex:none;opacity:.3;transition:opacity .2s}
.chip.has .dot{opacity:1}
.chip.sel{border-color:currentColor}
.chip .n{margin-left:auto;font-size:11px;color:var(--dim);font-variant-numeric:tabular-nums}
.chip.muted{opacity:.45}
.shapebar{display:flex;gap:6px;align-items:center;flex-wrap:wrap;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r);padding:7px 8px;margin-bottom:10px;min-height:52px}
.shapebar .name{font-size:13px;font-weight:600;min-width:62px}
.shapebar .empty{color:var(--dim);font-size:12.5px;padding:0 4px}
.stepper{display:flex;align-items:center;gap:2px;background:var(--panel2);border-radius:9px;padding:2px}
.stepper button{width:32px;height:32px;border:0;background:transparent;font-size:17px;cursor:pointer;border-radius:7px}
.stepper button:active{background:var(--line)}
.stepper .v{min-width:26px;text-align:center;font-variant-numeric:tabular-nums;font-size:14px}
.mini{border:1px solid var(--line);background:var(--panel2);border-radius:9px;padding:8px 9px;
  font-size:12.5px;cursor:pointer;white-space:nowrap}
.mini.on{background:var(--accent);border-color:var(--accent);color:var(--accentfg);font-weight:600}
.mini.part{border-color:var(--fg);font-weight:600}
details{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);margin-top:10px}
summary{padding:12px 14px;cursor:pointer;font-size:14px;font-weight:600;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"＋";float:right;color:var(--dim)}
details[open] summary::after{content:"−"}
.body{padding:2px 14px 14px;border-top:1px solid var(--line)}
.field{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line)}
.field:last-child{border-bottom:0}
.field label{width:78px;flex:none;font-size:13px;color:var(--dim)}
.field .val{width:52px;text-align:right;font-size:12.5px;font-variant-numeric:tabular-nums;color:var(--dim)}
input[type=range]{flex:1;accent-color:var(--fg);height:26px}
select{background:var(--panel2);border:1px solid var(--line);border-radius:9px;padding:8px 10px;flex:1}
.seg{display:flex;gap:4px;flex:1}
.seg button{flex:1;padding:8px 4px;border:1px solid var(--line);background:var(--panel2);
  border-radius:9px;font-size:13px;cursor:pointer}
.seg button.on{background:var(--accent);border-color:var(--accent);color:var(--accentfg);font-weight:600}
.seg button:disabled,select:disabled{opacity:.35;cursor:default}
.field.off label{opacity:.5}
.guide{font-size:12.5px;color:var(--dim);line-height:1.85}
.guide b{color:var(--fg);font-weight:600}
footer{margin-top:18px;font-size:11.5px;color:var(--dim);text-align:center;line-height:2}
footer a{color:var(--dim)}
footer a.about{display:inline-block;margin-bottom:4px;color:var(--fg);font-size:12.5px;font-weight:600}
[hidden]{display:none!important}
body.modal-open{overflow:hidden}
.modal{position:fixed;inset:0;background:rgba(0,0,0,0);display:flex;flex-direction:column;align-items:center;justify-content:flex-start;
  overflow-y:auto;overscroll-behavior:contain;padding-top:max(12px,env(safe-area-inset-top));
  z-index:50;opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .22s ease,background-color .22s ease,visibility 0s linear .22s}
.modal.open{opacity:1;visibility:visible;pointer-events:auto;background:rgba(0,0,0,.45);
  transition:opacity .22s ease,background-color .22s ease,visibility 0s}
.sheet{background:var(--bg);border:1px solid var(--line);border-bottom:0;border-radius:18px 18px 0 0;
  width:100%;max-width:520px;margin:auto auto 0;flex:none;
  padding:12px 16px calc(24px + env(safe-area-inset-bottom));
  display:flex;flex-direction:column;gap:10px;
  transform:translateY(24px);transition:transform .28s cubic-bezier(.22,1,.36,1)}
.modal.open .sheet{transform:translateY(0)}
.sheet::before{content:"";flex:none;width:36px;height:4px;border-radius:2px;background:var(--line);align-self:center}
.sheet h2{font-size:16px;margin:0;font-weight:600}
.sheet .field{border:0;padding:0;margin:0}
.sheet .note{font-size:12px;color:var(--dim);margin:0;line-height:1.75}
.sheet .grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0}
.sheet .grid .btn{text-align:center}
.image-preview-area{display:flex;align-items:center;justify-content:center;min-height:180px;padding:10px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r)}
.image-preview-area img{display:block;width:auto;height:auto;max-width:100%;max-height:460px;max-height:min(52dvh,460px);object-fit:contain;
  -webkit-touch-callout:default}
.image-save-guide{margin:0;color:var(--dim);font-size:12.5px;text-align:center}
.image-actions{grid-template-columns:1fr!important}
.hidefile{display:none}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(12px);opacity:0;
  background:var(--panel);border:1px solid var(--line);color:var(--fg);padding:9px 16px;border-radius:999px;
  font-size:13px;pointer-events:none;transition:.25s;z-index:60}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}