:root{font:14px/1.6 'Yu Gothic UI',Meiryo,sans-serif;color:#243c53;background:#edf3f8;--blue:#246aaa;--line:#d6e1eb}*{box-sizing:border-box}body{margin:0}header{background:#203d58;color:white;padding:18px 25px;display:flex;align-items:center;justify-content:space-between}h1{font-size:23px;margin:0}header p{color:#c5daed;margin:3px 0 0}.tag{border:1px solid #a6c3da;border-radius:20px;padding:6px 15px}button,select,input{font:inherit;color:inherit}button{padding:8px 11px;border:1px solid #b9ccdc;background:white;border-radius:7px;cursor:pointer}button:hover{background:#e5f1fc}button:disabled{opacity:.45;cursor:default}button:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #e7a922;outline-offset:2px}.primary{background:var(--blue);color:white;border-color:var(--blue)}.primary:hover{background:#174e7e}.toolbar{padding:11px 20px;background:white;display:flex;gap:8px;align-items:center;flex-wrap:wrap;border-bottom:1px solid var(--line)}.spacer{flex:1}.layout{display:grid;grid-template-columns:215px minmax(430px,1fr) 250px;gap:15px;padding:15px;max-width:1700px;margin:auto}aside,main{min-width:0}aside{background:white;border:1px solid var(--line);border-radius:12px;padding:15px;align-self:start}h2{font-size:15px;margin:0 0 12px}h3{font-size:15px}label{display:block;margin:10px 0}select,input{display:block;width:100%;padding:7px;border:1px solid #b9ccdc;border-radius:6px;background:white}label small{font-size:11px}.editor button{width:100%;margin:3px 0}.pair{display:flex;gap:4px}.pair button{font-size:12px}.muted{font-size:12px;color:#607b90}hr{border:0;border-top:1px solid var(--line);margin:18px 0}.lesson{border:1px solid var(--line);border-radius:12px;padding:12px 16px;background:white;display:flex;gap:8px;align-items:center;flex-wrap:wrap}.lesson label{margin:0;flex:1;min-width:200px}#task{width:100%;margin:0;color:#526c83;font-size:12px}.canvasTitle{display:flex;justify-content:space-between;align-items:center;padding:15px 8px 8px;gap:10px}.canvasTitle h2{margin:0}.canvasTitle span{font-size:11px;color:#58728b}#ladder{padding:8px;border:1px solid var(--line);border-radius:10px;background:white;overflow:auto;min-height:210px}.rung{display:flex;gap:8px;margin:8px 0;padding:10px 5px;border:2px solid transparent;border-radius:8px;min-width:390px;cursor:pointer}.rung.selected{border-color:#7cb1e0;background:#f1f8ff}.rungNumber{width:28px;color:#7b91a4;font:12px Consolas,monospace;padding-top:20px}.network{flex:1;border-left:3px solid #345673;border-right:3px solid #345673;padding:4px 0}.path{display:flex;align-items:center;min-height:62px}.path.selectedPath{background:#dceeff}.wire{flex:1;border-top:2px solid #516b81;min-width:12px}.wire.live{border-color:#d2810a;border-width:3px}.contact,.out{background:transparent;border:0;border-radius:4px;padding:0 4px;min-width:62px;position:relative}.contact:hover,.out:hover{background:#deedfa}.contact.selectedContact{outline:2px solid #2475b9;background:#dceeff}.contact svg,.out svg{display:block;width:62px;height:36px}.deviceLabel{font:13px Consolas,monospace;display:block;white-space:nowrap}.out{align-self:center;min-width:84px}.out svg{width:80px}.out small{display:block;font-size:10px}.emptyBranch{font-size:11px;color:#9a6a20;padding:0 8px}.outputWire{width:20px;border-top:2px solid #516b81;align-self:center}.outputWire.live{border-color:#d2810a;border-width:3px}#notice{min-height:45px;padding:10px 13px;background:#e2edf7;border-radius:8px;margin-top:10px;white-space:pre-line}.chart{margin-top:12px}#chart{background:white;border:1px solid var(--line);border-radius:10px;padding:8px;overflow:auto}#chart svg{min-width:480px;width:100%;display:block}.pb{width:100%;display:flex;justify-content:space-between;align-items:center;margin:7px 0;touch-action:none;user-select:none}.pb.pressed{background:#ffecb9;border-color:#e3b449}.state{font:12px Consolas,monospace;padding:2px 8px;background:#e7eef5;border-radius:15px}.state.on{background:#d5eebd;color:#345d17}.lampRow{display:flex;align-items:center;justify-content:space-between;padding:7px 0}.lamp{width:25px;height:25px;border-radius:50%;background:#d2dce4;border:2px solid #aab8c4}.lamp.on{background:var(--lamp);box-shadow:0 0 9px var(--lamp);border-color:#647e93}.device{display:flex;justify-content:space-between;gap:6px;font-size:12px;padding:4px 0}.mascot{margin-top:18px;border-top:1px solid var(--line);padding-top:12px;text-align:center}.mascot svg{width:125px;display:block;margin:auto}.mascot p{font-size:12px;background:#eef7ff;border-radius:10px;padding:12px;text-align:left;min-height:78px}.mascot h2{color:#246aaa;margin:4px}dialog{max-width:720px;width:90%;border:1px solid var(--line);border-radius:12px;padding:25px;color:#243c53}dialog::backdrop{background:#18364e99}#closeHelp{float:right}@media(max-width:1000px){.layout{grid-template-columns:185px minmax(360px,1fr)}.monitor{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:10px}.monitor .mascot{grid-column:2;grid-row:1/6}.monitor>h2{margin:5px}.monitor .muted{margin:2px}}@media(max-width:620px){header{padding:14px}header h1{font-size:18px}.tag{display:none}.layout{display:block;padding:8px}.editor{margin-bottom:10px}.editor{display:grid;grid-template-columns:1fr 1fr;gap:5px}.editor h2,.editor hr,.editor p{grid-column:1/-1}.monitor{display:block;margin-top:12px}.toolbar{padding:8px}#scanStatus{font-size:12px}.rung{min-width:440px}} 

.circuit{display:flex;flex:1;min-width:0;gap:0}.common{display:flex;align-items:center;border-left:3px solid #345673;min-width:120px;padding:4px 0}.common.selectedPath{background:#dceeff}

/* PLC図面に合わせ、接点は上にアドレス・下に用途名、コイル内にアドレス。 */
.contactCaption{display:block;min-height:18px;font-size:11px;white-space:nowrap}.path{min-height:80px}.common{min-width:130px}.network{border-right:0}.rung{gap:0}.rungNumber{margin-right:8px}.out{display:grid;grid-template-columns:80px 90px;grid-template-rows:18px 36px 18px;min-width:170px;padding:0}.out svg{grid-column:1;grid-row:2}.timerPreset{grid-column:1;grid-row:1;font:12px Consolas,monospace}.out small{grid-column:1;grid-row:3}.coilCaption{grid-column:2;grid-row:2;align-self:center;padding-left:8px;text-align:left;font-size:11px;overflow-wrap:anywhere}.out::after{content:'';position:absolute;left:80px;top:-10px;bottom:-10px;border-left:2px solid #345673}.outputWire{width:20px;flex-shrink:0}

/* 一枚のSVGで接点の隙間だけを開け、母線と並列枝を連続して描く。 */
.ladderDrawing{display:block;width:100%;height:auto;background:white}.ladderDrawing .rung,.ladderDrawing .path,.ladderDrawing .common,.ladderDrawing .contact,.ladderDrawing .out{display:inline;cursor:pointer}.ladderDrawing text{fill:#243c53;pointer-events:none}.ladderDrawing .address{font:11px Consolas,monospace}.ladderDrawing .caption{font:10px 'Yu Gothic UI',Meiryo,sans-serif}.ladderDrawing .selectionBox,.ladderDrawing .branchSelection,.ladderDrawing .rungSelection{fill:transparent;stroke:none}.ladderDrawing .rung.selected>.rungSelection{fill:#f6faff;stroke:#aecce5;stroke-width:1}.ladderDrawing .selectedPath>.branchSelection{fill:#e9f3fc}.ladderDrawing .selectedContact>.selectionBox{fill:#daedfc;stroke:#2475b9;stroke-width:1}.ladderDrawing .contact:hover>.selectionBox,.ladderDrawing .out:hover>.selectionBox{fill:#e0effa}.ladderDrawing .contact:focus-visible>.selectionBox,.ladderDrawing .out:focus-visible>.selectionBox{stroke:#e7a922;stroke-width:2}.ladderDrawing .contact,.ladderDrawing .out{outline:none}

.ladderDrawing .contact{touch-action:manipulation}.ladderDrawing .contact.inputActive>.selectionBox{fill:#fff1ce;stroke:#d29122;stroke-width:1}

.chartSelector{background:white;border:1px solid var(--line);border-radius:8px;padding:10px;margin-bottom:8px}.chartSelector summary{cursor:pointer;font-weight:600}.chartSignalActions{display:flex;gap:8px;margin:10px 0}.chartSignals fieldset{display:flex;flex-wrap:wrap;gap:6px 12px;border:1px solid var(--line);border-radius:6px;margin:8px 0;padding:8px}.chartSignals legend{font-size:12px}.chartSignals label{display:flex;align-items:center;gap:5px;margin:0;min-width:65px;font:12px Consolas,monospace;cursor:pointer}.chartSignals input{display:inline-block;width:auto;margin:0;accent-color:var(--blue)}

.chartTime{display:flex;align-items:center;gap:10px;margin:0 0 8px}.chartTime select{width:110px}

.ladderDrawing .lampCoil.on{filter:drop-shadow(0 0 4px var(--coil-color))}

.ladderDrawing .coilCaptionText{pointer-events:auto;cursor:text}

.ladderDrawing .contactCaptionText{pointer-events:auto;cursor:text}

.ladderDrawing .out.selectedOutput>.selectionBox{fill:#daedfc;stroke:#2475b9;stroke-width:1}

.introLink{padding:8px 11px;border:1px solid #b9ccdc;background:white;border-radius:7px;text-decoration:none;color:inherit}.introLink:hover{background:#e5f1fc}.mascot img{width:175px;max-width:100%;height:auto;display:block;margin:auto;transform-origin:55% 85%;animation:ladderWelcome 4s ease-in-out infinite}.mascot img.operating{animation-duration:2.6s}.mascot img.motionStopped{animation-play-state:paused}#mascotMotion{font-size:11px;margin:8px 0 0} @keyframes ladderWelcome{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-5px) rotate(1deg)}} @media(prefers-reduced-motion:reduce){.mascot img{animation:none}}

.mascot .characterSprite{width:190px;max-width:100%;aspect-ratio:1;display:block;margin:auto;background-image:url('assets/ladder-chan-talk-sheet-v1.png');background-size:200% 200%;background-position:100% 0;background-repeat:no-repeat;animation:mascotWave 1.8s step-end infinite}.mascot .characterSprite.operating{animation-duration:1.4s}.mascot .characterSprite.motionStopped{animation-play-state:paused}@keyframes mascotWave{0%,49%{background-position:100% 0}50%,100%{background-position:100% 100%}}@media(prefers-reduced-motion:reduce){.mascot .characterSprite{animation:none}}

/* Keep K settings and the file picker hidden when not applicable. */
[hidden]{display:none!important}

.holdPB{display:flex;align-items:center;gap:6px;font-size:11px;margin:-2px 0 9px}.holdPB input{width:auto;display:inline;margin:0}.eventTitle{margin-top:16px}.eventRow{font:12px Consolas,monospace;padding:6px 0;border-bottom:1px solid var(--line)}.eventRow small{display:block;font:11px Meiryo,sans-serif;color:#607b90}

/* 課題選択欄と操作ボタンを同じ高さ・位置に揃える。 */
.lesson{align-items:flex-end}
.lesson select,.lesson>button{height:44px}

.pulseComparison{width:100%;overflow-x:auto}.pulseComparison table{border-collapse:collapse;width:100%;min-width:420px;font-size:12px}.pulseComparison caption{text-align:left;font-weight:600;padding:4px 0}.pulseComparison th,.pulseComparison td{border:1px solid var(--line);padding:5px 8px;text-align:center}.pulseComparison tbody th{text-align:left;font-weight:normal}.pulseComparison thead th:nth-child(2){background:#fffdf0}.pulseComparison thead th:nth-child(3){background:#fff2b5}.pulseComparison thead th:nth-child(4){background:#d8f2df}

.ladderActions{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap}#clear{color:#a43535;border-color:#dfb8b8;white-space:nowrap}

.ladderDrawing .out.duplicateOutput>.selectionBox{fill:#fff0f0;stroke:#cf3636;stroke-width:2}

#coilWarning{border:2px solid #cc6b21;max-height:80vh;overflow:auto}#coilWarningTitle{color:#a63f16}#coilWarningDetails{white-space:pre-line;line-height:1.8}#coilWarning form{display:flex;justify-content:flex-end;margin-top:20px}

/* A4 landscape snapshot, shared by preview and browser printing. */
.chartPrintOption{display:inline-flex;align-items:center;gap:6px;margin-right:16px;font-size:12px}
#printSheet{display:none}
#printPreview{width:min(1100px,94vw);max-width:1100px;max-height:90vh;overflow:auto;padding:18px}
.printPreviewTools{display:flex;align-items:center;gap:12px;position:sticky;top:-18px;background:white;padding:10px 0;z-index:1}
.printPreviewTools h2{margin:0;flex:1}
#printPreviewPages{background:#e8edf2;padding:12px;display:grid;gap:16px}
.print-page{display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:3mm;aspect-ratio:277/188;background:white;color:#172b40;overflow:hidden;padding:10mm}
.print-heading h1{font-size:14pt;margin:0 0 1mm}.print-heading p{font-size:8pt;margin:0;line-height:1.35}
.print-panel{min-width:0;min-height:0;overflow:hidden;border:0.3mm solid #a8b4bf;padding:2mm}
.print-panel svg{display:block;width:100%;height:100%;min-width:0!important;min-height:0;max-width:100%;overflow:hidden}
.print-page .print-footer{font-size:8pt;margin:0;text-align:right}
.print-page *{animation:none!important;transition:none!important}
.print-page .lampCoil.on{filter:none}
@page{size:A4 landscape;margin:10mm}
@media print{
 html,body{margin:0!important;padding:0!important;background:white!important;width:auto!important;height:auto!important;min-width:0!important}
 body.print-ready>*:not(#printSheet){display:none!important}
 dialog::backdrop{display:none!important;background:transparent!important}
 #printSheet{display:block!important;color:#172b40;print-color-adjust:exact;-webkit-print-color-adjust:exact}
 #printSheet .print-page{width:277mm;height:188mm;aspect-ratio:auto;padding:0;break-inside:avoid;page-break-inside:avoid}
 #printSheet .print-page+.print-page{break-before:page;page-break-before:always}
}