/* Layout: full-screen drawing sheet; slim top bar; on-demand keypad sheet docked bottom (bottom-right on iPad) */
:root{
  --bg:#EEF1EE; --paper:#F8FAF8; --grid:#DCE3DE; --grid-major:#C3CEC7;
  --ink:#1D2822; --muted:#5E6E65; --line:#CBD5CF;
  --conf:#1D2822; --unconf:#C8412B; --diag:#3D6FA8; --sel:#E0A400; --warn:#E06D00;
  --panel:#FFFFFF; --key:#EEF2EF; --key-ink:#1D2822; --go:#2F6B4F; --go-ink:#FFFFFF;
  --ui:"IBM Plex Sans JP","Hiragino Sans","Hiragino Kaku Gothic ProN",system-ui,sans-serif;
  --num:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#121815; --paper:#161D19; --grid:#1F2924; --grid-major:#2C3832;
  --ink:#E3EAE5; --muted:#93A399; --line:#2E3A33;
  --conf:#E3EAE5; --unconf:#FF7A62; --diag:#7FAEE6; --sel:#FFC832; --warn:#FF9A3D;
  --panel:#1C2420; --key:#26302B; --key-ink:#E3EAE5; --go:#3F8A66; --go-ink:#FFFFFF; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#121815; --paper:#161D19; --grid:#1F2924; --grid-major:#2C3832;
  --ink:#E3EAE5; --muted:#93A399; --line:#2E3A33;
  --conf:#E3EAE5; --unconf:#FF7A62; --diag:#7FAEE6; --sel:#FFC832; --warn:#FF9A3D;
  --panel:#1C2420; --key:#26302B; --key-ink:#E3EAE5; --go:#3F8A66; --go-ink:#FFFFFF; color-scheme:dark}
html,body{height:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--ui);overflow:hidden;overscroll-behavior:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}
.app{height:100%;display:grid;grid-template-rows:auto 1fr;grid-template-columns:minmax(0,1fr)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;touch-action:manipulation}
button:focus-visible{outline:2px solid var(--sel);outline-offset:2px}
.top{display:flex;flex-wrap:nowrap;align-items:center;gap:8px;padding:8px 12px;background:var(--panel);border-bottom:1px solid var(--line)}
.brand{font-weight:600;font-size:15px;letter-spacing:.04em;flex:1 1 auto;min-width:40px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.seg{display:flex;background:var(--key);border-radius:10px;padding:3px}
.seg button{padding:8px 14px;border-radius:8px;font-size:14px;color:var(--muted);min-height:38px}
.seg button[aria-pressed="true"]{background:var(--panel);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.12)}
.tools{display:flex;gap:6px;margin-left:auto;flex-wrap:nowrap;align-items:center;flex:0 0 auto}
.tb.ic{width:40px;flex:0 0 40px;padding:0;display:inline-flex;align-items:center;justify-content:center}
.tb.ic.on{background:var(--sel);color:#1D2822}
.tsep{width:1px;height:24px;background:var(--line);margin:0 2px}
.tb.add{background:var(--go);color:var(--go-ink);font-weight:600;padding:8px 12px;display:inline-flex;align-items:center;gap:2px}
.tb.add b{font-size:18px;font-weight:500;line-height:1}
.tb.add.open{box-shadow:0 0 0 2px var(--sel)}
#b-measure.on{background:var(--go);color:var(--go-ink);font-weight:600}
.toolchip{max-width:150px;overflow:hidden;text-overflow:ellipsis;display:inline-flex;align-items:center;gap:4px;height:38px;padding:0 12px;border-radius:8px;background:color-mix(in srgb,var(--go) 16%,transparent);color:var(--ink);font-size:14px;font-weight:600;border:1.5px solid var(--go);white-space:nowrap}
.tb.stop{font-weight:600;transition:background .15s}
.tb.stop:not(:disabled){background:var(--unconf);color:#fff}
.tb.stop:disabled{opacity:.35}
.stage.active::after{content:"";position:absolute;inset:0;border:3px solid var(--go);pointer-events:none;z-index:2;opacity:.75}
@media (max-width:700px){.tb.add{padding:8px 8px}.toolchip{padding:0 8px}}
.tb{padding:8px 12px;border-radius:8px;font-size:14px;min-height:38px;background:var(--key)}
.tb:disabled{opacity:.4}
.stage{position:relative;min-height:0}
#cv{position:absolute;inset:0;width:100%;height:100%;touch-action:none;display:block}
.hud{position:absolute;left:44px;top:50px;right:40px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;pointer-events:none}
.hint{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--ink)}
.chip{background:var(--sel);color:#1D2822;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:600}
.ctx{position:absolute;left:40px;bottom:calc(40px + env(safe-area-inset-bottom,0px));display:flex;gap:8px;flex-wrap:wrap}
.ctx button{background:var(--panel);border:1px solid var(--line);padding:10px 16px;border-radius:10px;font-size:15px;min-height:44px}
.ctx button.go{background:var(--go);color:var(--go-ink);border-color:transparent;font-weight:600}
.scale{position:absolute;right:40px;top:40px;font:500 12px var(--num);color:var(--muted);pointer-events:none}
.sheet{position:fixed;left:0;right:0;bottom:0;background:var(--panel);border-top:1px solid var(--line);border-radius:14px 14px 0 0;padding:8px 10px calc(10px + env(safe-area-inset-bottom,0px));box-shadow:0 -6px 24px rgba(0,0,0,.18);transform:translateY(105%);transition:transform .18s ease-out;z-index:5;max-height:80%;overflow:auto}
.sheet.open{transform:none}
.sheet:not(.open){pointer-events:none}
@media (min-width:720px){.sheet{left:auto;right:16px;bottom:16px;width:256px;border-radius:14px;border:1px solid var(--line);padding-bottom:10px}}
@media (prefers-reduced-motion:reduce){.sheet{transition:none}}
.sh-head{display:flex;align-items:center;gap:6px;margin-bottom:6px;cursor:grab;flex-wrap:wrap}
.sheet{touch-action:none}
.sheet textarea{touch-action:auto}
.sheet::before{content:"";display:block;width:64px;height:6px;border-radius:3px;background:var(--muted);opacity:.45;margin:0 auto 8px;cursor:grab}
.sheet.dragging{transition:none;box-shadow:0 10px 32px rgba(0,0,0,.28)}
.sheet.free{left:var(--px);top:var(--py);right:auto;bottom:auto;width:min(256px,calc(100vw - 32px));border:1px solid var(--line);border-radius:16px;padding-bottom:14px;max-height:calc(100% - 32px);transform:none;opacity:0;visibility:hidden;transition:opacity .15s,visibility .15s}
.sheet.free.open{opacity:1;visibility:visible}
.sh-title{font-weight:600;font-size:13px}
.sh-sub{font:500 11px var(--num);color:var(--muted)}
.x{margin-left:auto;width:30px;height:30px;border-radius:8px;background:var(--key);font-size:15px}
.disp{display:flex;align-items:baseline;justify-content:flex-end;gap:4px;background:var(--key);border-radius:8px;padding:5px 10px;margin-bottom:6px;min-height:38px;flex-wrap:wrap}
.disp .v{font:700 21px var(--num);letter-spacing:.02em;font-variant-numeric:tabular-nums}
.disp .v.ph{color:var(--muted);font-weight:500}
.disp .u{font:500 11px var(--num);color:var(--muted)}
.disp .lab{margin-right:auto;font-size:10px;color:var(--muted);align-self:center}
.keys{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
.keys button{background:var(--key);color:var(--key-ink);border-radius:7px;min-height:34px;font:500 16px var(--num)}
.keys button:active{filter:brightness(.92)}
.keys .ok{grid-column:4;grid-row:4 / span 2;background:var(--go);color:var(--go-ink);font:600 13px var(--ui)}
.keys .zero{grid-column:span 2}
.keys .sm{font:600 11px var(--ui)}
.row{display:flex;gap:4px;flex-wrap:wrap;margin-top:5px}
.row button{flex:1 1 auto;background:var(--key);border-radius:7px;min-height:30px;padding:0 8px;font-size:12px}
.row button.danger{color:var(--unconf)}
.row .lbl{align-self:center;font-size:11px;color:var(--muted);flex:0 0 auto}
.row button.on{background:var(--sel);color:#1D2822;font-weight:600}
.dir{display:grid;grid-template-columns:repeat(3,40px);gap:4px;justify-content:center;margin-bottom:6px}
.dir button{height:32px;border-radius:7px;background:var(--key);font-size:15px}
.dir button.on{background:var(--sel);color:#1D2822}
.dir .ang{font:600 13px var(--num)}
.note{font-size:11px;color:var(--muted);line-height:1.5;margin-top:5px}
.snapchip{position:absolute;transform:translate(-50%,calc(-100% - 14px));background:var(--sel);color:#1D2822;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .15s;box-shadow:0 2px 6px rgba(0,0,0,.2)}
.snapchip.show{opacity:1}
.toast{position:fixed;left:50%;top:70px;transform:translateX(-50%);background:var(--ink);color:var(--panel);padding:8px 16px;border-radius:999px;font-size:13px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:9}
.toast.show{opacity:1}
.pop{position:absolute;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 28px rgba(0,0,0,.22);padding:6px;z-index:6;display:grid;gap:4px}
.pop button{min-height:34px;border-radius:8px;background:var(--key);padding:0 10px;font-size:13px;text-align:left;white-space:nowrap}
.pop button:disabled{opacity:.4}
.pop .sep{height:1px;background:var(--line);margin:2px 0}
.pop button.danger{color:var(--unconf)}
#fan{position:fixed;top:58px;right:16px;grid-template-columns:200px}
#fan button.on{background:var(--go);color:var(--go-ink);font-weight:600}
#fan .soon{font-size:10px;color:var(--muted)}
#menu{position:fixed;left:12px;top:58px;max-height:calc(100vh - 80px);overflow:auto}
.lrow{display:grid;grid-template-columns:36px 36px minmax(80px,170px) auto;gap:4px;align-items:center}
.pop .lrow button{text-align:center;padding:0 8px}
.lrow .ln{font-size:13px;padding:0 4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pop .lrow button.on{color:var(--go);font-weight:700}
[hidden]{display:none!important}
.chips{position:absolute;z-index:6;display:flex;flex-direction:column;gap:2px;width:220px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:6px;box-shadow:0 8px 28px rgba(0,0,0,.22)}
#loupe{position:absolute;left:0;top:0;will-change:transform;z-index:7;width:132px;height:132px;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 1px var(--line),0 8px 22px rgba(0,0,0,.28);pointer-events:none;background:var(--bg)}
.chips .mgrip{height:18px;margin:-4px -6px 2px;display:flex;align-items:center;justify-content:center;cursor:grab;touch-action:none}
.chips .mgrip::before{content:"";width:64px;height:6px;border-radius:3px;background:var(--muted);opacity:.45}
.chips .mhead{display:flex;align-items:center;gap:4px;padding:0 0 4px;border-bottom:1px solid var(--line);margin-bottom:2px}
.chips .mt{font-size:12px;font-weight:600;color:var(--ink);padding:2px 4px;flex:1;min-width:0}
.chips .tabs{display:flex;gap:2px;flex:1;min-width:0;background:var(--key);border-radius:8px;padding:2px}
.chips .tabs button{flex:1 1 auto;min-height:26px;border-radius:6px;padding:0 6px;font-size:11px;background:transparent;color:var(--muted)}
.chips .tabs button.on{background:var(--panel);color:var(--ink);font-weight:700;box-shadow:0 1px 2px rgba(0,0,0,.15)}
.chips .mnext,.chips .mback{min-height:28px;border-radius:7px;background:var(--key);padding:0 8px;font-size:12px}
.chips .mlist{display:flex;flex-direction:column;gap:1px}
.chips .mi{display:flex;align-items:center;gap:4px;min-height:32px;border-radius:7px;background:transparent;padding:0 6px;font-size:13px;text-align:left}
.chips .mi:active,.chips .mi:hover{background:var(--key)}
.chips .mi .ck{width:14px;color:var(--go);font-weight:700}
.chips .mi .ml{flex:1}
.chips .mi .sf{color:var(--muted);font-size:15px}
.chips .mi.danger{color:var(--unconf);border-top:1px solid var(--line);border-radius:0 0 7px 7px;margin-top:2px}
.x.more{margin-left:0;font-size:18px;line-height:1}
.chips button{white-space:nowrap}
.chips button.on{background:var(--sel);color:#1D2822;font-weight:600}
.chips button.danger{color:var(--unconf)}
.keys .op{font:600 15px var(--num);background:var(--line)}
.keys .dk{font-size:15px}
.keys .dk.on{background:var(--sel);color:#1D2822}
.tb.on{background:var(--sel);color:#1D2822;font-weight:600}
textarea{width:100%;height:120px;font:12px var(--num);background:var(--key);color:var(--ink);border:0;border-radius:8px;padding:8px;box-sizing:border-box;-webkit-user-select:text;user-select:text}