:root{font-family:system-ui,'Malgun Gothic',sans-serif;color:#233e39;background:#f3f5ef;--green:#166c57;--line:#dce5dc;--tile:12px}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0}header{max-width:1400px;margin:auto;padding:30px 28px 24px;display:flex;justify-content:space-between;align-items:center}.eyebrow{font-size:10px;font-weight:750;letter-spacing:2px;color:#758a72}h1{font-size:30px;margin:9px 0}h1 span{font-weight:350}p{line-height:1.6}header p{margin:0;color:#687b70;font-size:14px}.badge{font-size:12px;border:1px solid #c8ddcb;background:#e9f3e8;padding:10px 16px;border-radius:30px;color:#397546}main{max-width:1400px;margin:auto;padding:0 28px 28px}.toolbar{display:flex;gap:8px;margin-bottom:16px}.spacer{flex:1}button,.filebutton,select{font:inherit;font-size:13px;border:1px solid #cddbd1;border-radius:8px;background:white;color:#2b4c42;padding:10px 13px;cursor:pointer}button:hover,.filebutton:hover{background:#eaf3e9}button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #eab53c;outline-offset:2px}button:disabled{opacity:.45;cursor:not-allowed}.filebutton input{display:none}.layout{display:grid;grid-template-columns:minmax(300px,420px) minmax(490px,1fr);gap:20px;align-items:start}.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:0 4px 16px #24493204}.boardpanel{position:sticky;top:14px}.sectionhead{display:flex;justify-content:space-between;gap:10px;align-items:center}.sectionhead h2{font-size:17px;margin:0}.sectionhead h2 b{color:#8ba78d;font-size:12px;margin-right:10px}.sectionhead>span{font-size:12px;color:#7a897b}.hint{font-size:12px;color:#6d7e72;margin:12px 0}.viewLabel{font-size:12px;color:#27765c;background:#edf5e8;border-radius:7px;padding:8px 10px;margin:12px 0}.board{display:grid;grid-template-columns:20px repeat(10,1fr);gap:3px;user-select:none;touch-action:none}.cell{padding:0;aspect-ratio:1;border-radius:4px;border:1px solid #dfe8df;background:#f2f5ee;min-width:0}.board .cell:disabled{opacity:1;cursor:default}.cell.on{background:#517968;border-color:#416555;box-shadow:inset 0 2px #ffffff25}.cell.newcell{background:#f3b841;border-color:#d79c22}.cell.clearing{outline:2px solid #ec865b;outline-offset:-2px}.coord{font-size:10px;color:#7d9280;display:flex;align-items:center;justify-content:center}.legend{font-size:11px;color:#718577;display:flex;align-items:center;gap:6px;margin-top:14px}.legend i{width:10px;height:10px;border-radius:2px;background:#517968;margin-left:8px}.legend i.new{background:#f3b841}.legend i.clear{background:#ec865b}.editToggle{font-size:12px}.right{display:grid;gap:16px}.choices{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.choice{border:1px solid #dfe8dc;border-radius:10px;background:#f9fbf7;overflow:hidden}.choice.active{border:2px solid #338866}.choicePick{display:block;width:100%;border:0;background:transparent;padding:10px}.choicePick strong{font-size:14px}.choiceDrawing{height:83px;display:flex;align-items:center;justify-content:center}.choiceDrawing .shapeDiagram{--tile:13px}.choiceDrawing.placeholder{font-size:34px;color:#bdcbbf}.choiceTools{display:flex;justify-content:center;gap:6px;padding:0 6px 7px}.choiceTools button{font-size:16px;padding:1px 10px}.choice:nth-child(2) .shapeDiagram i.on{background:#9a81c0}.choice:nth-child(3) .shapeDiagram i.on{background:#d7a24c}.selectionTools{display:flex;justify-content:space-between;align-items:center;gap:8px;margin:8px 0 12px}.selectionTools button{font-size:11px;padding:6px 9px}.selectionTools .hint{margin:0}.catalog{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:7px}.catalogTile{padding:7px 2px 5px;display:flex;flex-direction:column;align-items:center;background:#fcfdf9}.catalogTile strong{font-size:17px;line-height:1.2}.catalogDrawing{height:67px;display:flex;align-items:center;justify-content:center}.catalogTile>span:last-child{font-size:10px;color:#829082}.catalogTile .shapeDiagram{--tile:9px;gap:1px}.shapeDiagram{display:grid;gap:2px;width:max-content}.shapeDiagram i{display:block;width:var(--tile);height:var(--tile);background:transparent;border-radius:1px}.shapeDiagram i.on{background:#60a48d;border:1px solid #498c77}.catalogNote{font-size:10px;margin-bottom:0}.powerInputs{display:flex;gap:12px;margin-top:14px}.powerInputs label{flex:1;font-size:13px}.powerInputs small{font-size:10px}.powerInputs select{display:block;width:100%;margin-top:7px}.settingsrow{display:flex;gap:12px;margin-top:12px}.settingsrow label{font-size:12px;flex:1}.settingsrow select{display:block;width:100%;margin-top:7px;font-size:12px}.notice{font-size:11px;color:#947039;background:#fff8e9;border-radius:8px;padding:9px 12px}.actions{display:flex;gap:10px;margin-top:16px}.primary{background:var(--green);color:white;border-color:var(--green);flex:1;text-align:left;font-weight:650;padding:13px 18px}.primary:hover{background:#125b49}.primary span{float:right}#status{font-size:12px;color:#456b55;margin-bottom:0}#status.error{color:#b13c2c}.abilityAdvice{border:1px solid #e7cf95;background:#fff8e8;border-radius:10px;padding:14px;margin-top:14px;font-size:13px}.abilityAdvice p{font-size:12px}.abilityAdvice button{background:#ffe7ab;font-size:12px}.empty{text-align:center;color:#93a393;font-size:13px;padding:24px 0}.step{display:block;text-align:left;width:100%;margin:8px 0;border:1px solid #dce6db;padding:14px;background:#fcfdfa;min-height:96px;overflow:auto}.step.selected{border:2px solid #378b6d;background:#eff7ec;padding:13px}.step strong{font-size:14px;display:block}.step span{font-size:12px;display:block;line-height:1.7;margin-top:5px}.resultShape{float:right;margin-left:10px;--tile:12px}.resultShape i.on{background:#d7a242;border-color:#bf8b29}.powerStep{background:#fff9e9;border-color:#e7c981}#total{color:#267657;font-weight:700}details{font-size:12px;color:#64796a;margin-top:14px}summary{cursor:pointer;font-weight:600}footer{margin-top:22px;padding:0 4px;font-size:11px;color:#869487}footer a{color:#347f66}footer details{padding:15px 18px;background:#e9eee4;border-radius:12px}.error{color:#a33}
@media(max-width:1050px){.catalog{grid-template-columns:repeat(5,minmax(0,1fr))}.layout{grid-template-columns:minmax(280px,360px) minmax(400px,1fr)}}@media(max-width:820px){.layout{grid-template-columns:1fr}.boardpanel{position:static;max-width:440px;width:100%;margin:auto}.right{min-width:0}.catalog{grid-template-columns:repeat(7,minmax(0,1fr))}.badge{display:none}}@media(max-width:560px){main{padding:0 12px 24px}header{padding:24px 16px}h1{font-size:24px}.panel{padding:15px}.catalog{grid-template-columns:repeat(5,minmax(0,1fr))}.settingsrow{flex-direction:column}.toolbar{flex-wrap:wrap}.choices{gap:6px}.sectionhead>span{font-size:10px}.selectionTools .hint{font-size:10px}}

/* A/B/C colors remain separate until the user confirms placement. */
:root{--slot-a:#428bca;--slot-b:#9a65be;--slot-c:#db932b}
.board .cell[data-piece="0"]{background:var(--slot-a);border-color:#286aa3}
.board .cell[data-piece="1"]{background:var(--slot-b);border-color:#75449d}
.board .cell[data-piece="2"]{background:var(--slot-c);border-color:#a87019}
.board .cell[data-piece="4"]{background:#c75168;border-color:#a2364b}
.board .cell[data-piece]{color:white;font-size:11px;font-weight:750;box-shadow:inset 0 1px #ffffff35}
.choice[data-slot="0"] .shapeDiagram i.on,.step[data-slot="0"] .shapeDiagram i.on{background:var(--slot-a);border-color:#286aa3}
.choice[data-slot="1"] .shapeDiagram i.on,.step[data-slot="1"] .shapeDiagram i.on{background:var(--slot-b);border-color:#75449d}
.choice[data-slot="2"] .shapeDiagram i.on,.step[data-slot="2"] .shapeDiagram i.on{background:var(--slot-c);border-color:#a87019}
.step[data-slot="4"] .shapeDiagram i.on{background:#c75168;border-color:#a2364b}
.step[data-slot="0"]{border-left:5px solid var(--slot-a)}.step[data-slot="1"]{border-left:5px solid var(--slot-b)}.step[data-slot="2"]{border-left:5px solid var(--slot-c)}
.legend{flex-wrap:wrap}.legend i.slotA{background:var(--slot-a)}.legend i.slotB{background:var(--slot-b)}.legend i.slotC{background:var(--slot-c)}
.finishPanel{background:#edf6e9;border-radius:10px;padding:10px;margin-bottom:12px}.finishPanel .actions{margin:0}.finishPanel .hint{font-size:11px;margin:8px 0 0}.finishPanel .primary{text-align:center}

.choice.planned .choicePick{height:100%;padding:10px 8px}.choice.planned .choicePick strong{display:block}.orderBadge{display:inline-block;background:#e7efe3;color:#365d45;border-radius:12px;font-size:11px;font-weight:750;padding:3px 9px;margin-bottom:7px}.choice.active .orderBadge{background:#226b51;color:#fff}.choiceCoord{display:block;font-size:12px;font-weight:700;margin:2px 0 4px}.placementInfo{margin-top:12px;border-top:1px solid #dce5dc;padding-top:12px}.placementInfo>strong{font-size:12px}.placementInfo .step{min-height:0;cursor:default;padding:10px 12px;margin-bottom:4px}.placementInfo .step strong{font-size:13px}.placementInfo .step span{font-size:11px;margin-top:3px}.placementInfo .hint{margin:8px 0;font-size:11px}

.stepNavigation{display:flex;gap:8px;margin:0 0 12px}.stepNavigation button{flex:1;font-size:15px;font-weight:750;padding:12px}.stepNavigation #nextStep{background:#166c57;color:#fff;border-color:#166c57}.stepNavigation #nextStep:hover{background:#125b49}.choice.planned .choicePick{text-align:center;cursor:default}.choice.planned.active{background:#edf6e9}.board .cell.currentPlacement{box-shadow:inset 0 0 0 2px #163e33,0 0 0 1px #163e33}.board .cell.currentPlacement.clearing{outline:2px solid #ec865b;outline-offset:-4px}

.strategySelect{display:block;font-size:13px;margin-top:14px}.strategySelect select{display:block;width:100%;margin-top:7px}.strategyAdvice{margin-top:12px;padding:12px;background:#f2f6ed;border-radius:8px;font-size:12px;color:#45664f}.strategyAdvice p{margin:5px 0;font-size:11px;line-height:1.5}