:root{--ink:#26415f;--muted:#475569;--bg:#f8fafc;--line:#cbd5e1;--orange:#ff8200;--orange-ring:#e65c00;--orange-text:#c2410c;--orange-soft:#fff4e6;--font-sans:ui-sans-serif, system-ui, sans-serif;--font-marelle:"Marelle 2", "Comic Sans MS", cursive;--desk-w:100px;--desk-h:80px}*{box-sizing:border-box}[hidden]{display:none!important}body{font:15px/1.4 var(--font-sans);background:var(--bg);color:var(--ink);flex-direction:column;height:100vh;margin:0;padding:12px 16px;display:flex}:focus-visible{outline:3px solid var(--ink);outline-offset:2px;box-shadow:0 0 0 2px #fff}.marelle{font-family:var(--font-marelle);font-synthesis:none;letter-spacing:0;font-style:normal;font-weight:400;line-height:1.6}button{border:2px solid var(--ink);background:var(--ink);color:#fff;min-height:40px;font:bold 15px var(--font-sans);cursor:pointer;border-radius:12px;padding:8px 14px}button:hover:not(:disabled){filter:brightness(1.25)}button:disabled{opacity:.4;cursor:not-allowed}button.secondary{color:var(--ink);background:#fff}button.secondary:hover:not(:disabled){filter:none;background:#eef2f7}button.danger{color:#b91c1c;background:#fff;border-color:#b91c1c}button.on{background:var(--orange-text);border-color:var(--orange-text);color:#fff}.topbar{flex-wrap:wrap;align-items:center;gap:6px 20px;margin-bottom:10px;display:flex}.home{color:var(--ink);border-radius:999px;align-items:center;gap:8px;padding:2px 10px 2px 2px;text-decoration:none;display:inline-flex}.home span{font-size:20px}.home:hover{text-decoration:underline}.home img{object-fit:cover;border:2px solid #ffedd5;border-radius:50%;width:36px;height:36px}.topbar h1{margin:0;font-size:30px}.title-field{flex:260px;align-items:center;gap:8px;display:flex}.title-field label{white-space:nowrap;font-size:19px}.title-field input{border:2px solid var(--line);min-width:0;min-height:44px;color:var(--ink);background:#fff;border-radius:12px;flex:1;padding:4px 12px;font-size:20px}.title-field input::placeholder{color:#64748b}.topbar-right{flex-wrap:wrap;align-items:center;gap:8px 12px;margin-left:auto;display:flex}.seg-wrap{align-items:center;gap:8px;display:flex}#viewLabel{font-size:19px}.seg{border:2px solid var(--ink);border-radius:12px;display:inline-flex;overflow:hidden}.seg button{color:var(--ink);background:#fff;border:0;border-radius:0;min-height:36px}.seg button:hover:not(:disabled){filter:none;background:#eef2f7}.seg button[aria-pressed=true]{background:var(--ink);color:#fff}.steps{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;margin:0 0 10px;padding:0;list-style:none;display:grid}.step{border:1px solid var(--line);background:#fff;border-radius:16px;padding:8px 14px 12px}.step-head{align-items:center;gap:10px;display:flex}.step h2{margin:0;font-size:22px}.num{background:var(--orange-text);color:#fff;width:26px;height:26px;font:bold 14px var(--font-sans);border-radius:50%;flex:none;justify-content:center;align-items:center;display:inline-flex}.step-help{color:var(--muted);margin:0 0 8px 36px;font-size:14px}.step-actions{flex-wrap:wrap;gap:8px;display:flex}@media screen and (height<=820px){body{padding-top:8px;padding-bottom:8px}.topbar{margin-bottom:6px}.steps{gap:8px;margin-bottom:6px}.step{padding:6px 12px 8px}.step-head{margin-bottom:6px}.step-help{display:none}.hint-bar{margin-bottom:6px;padding:6px 12px}}.hint-bar{background:var(--orange-soft);border:1px solid #fed7aa;border-left:5px solid var(--orange);border-radius:12px;margin-bottom:10px;padding:8px 12px;font-size:14px}.hint-bar.edit{border-color:var(--line);border-left-color:var(--ink);background:#eef2f7}.container{flex:1;gap:16px;min-height:0;display:flex;overflow:hidden}.sidebar{border:1px solid var(--line);background:#fff;border-radius:16px;flex-direction:column;flex:none;gap:10px;width:270px;padding:12px;display:flex}.sidebar h2{text-align:center;margin:0;font-size:22px}#student-list{background:var(--bg);border:2px dashed #94a3b8;border-radius:12px;flex-direction:column;flex:1;align-items:center;gap:10px;min-height:120px;padding:10px;display:flex;overflow-y:auto}body.has-selection #student-list{min-height:72px}#student-list.drag-over{background:#e8f5e9;border-color:#1e7e34}.empty-msg{color:var(--muted);text-align:center;margin:auto 0;font-size:14px}.sel-panel{border:1px solid var(--line);background:#fff;border-radius:12px;flex:0 auto;min-height:0;padding:10px;font-size:14px;overflow-y:auto}.sel-top{flex-direction:column;align-items:flex-end;gap:6px;margin-bottom:8px;display:flex}.sel-name{border:2px solid var(--line);width:100%;min-height:40px;font:bold 15px var(--font-sans);color:var(--ink);background:#fff;border-radius:12px;padding:4px 10px}.sel-top button{min-height:36px;padding:4px 12px;font-size:14px}.sel-tags{flex-direction:column;gap:6px;margin-bottom:8px;display:flex}.sel-tag{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:8px;align-items:center;gap:8px;padding:6px 8px;display:flex}.sel-tag input{flex:none;width:20px;height:20px;margin:0}.sel-hint{color:var(--muted);margin:4px 0 8px}.sel-panel .wide{width:100%}.classroom-container{border:1px solid var(--line);background:#fff;border-radius:16px;flex-direction:column;flex:1;min-width:0;padding:16px;display:flex;overflow:auto}.legend{flex-wrap:wrap;justify-content:center;gap:8px;margin:0 auto 14px;display:flex}.legend-item{border:1px solid var(--line);background:#fff;border-radius:999px;align-items:center;gap:8px;padding:3px 12px 3px 4px;font-size:14px;display:inline-flex}.legend-item.zero{opacity:.6}.legend-total{color:var(--muted);align-items:center;padding:3px 10px;font-size:14px;display:inline-flex}#roomFit{flex:none;width:max-content;margin:0 auto}.room{gap:14px;width:max-content;display:flex}.room.board-bottom{flex-direction:column}.room.board-top{flex-direction:column-reverse}.room.board-right{flex-direction:row}.room.board-left{flex-direction:row-reverse}.classroom{background:#eef2f5;border-radius:12px;gap:15px;padding:10px;display:grid}.grid-cell{border-radius:8px;justify-content:center;align-items:center;min-width:70px;min-height:60px;display:flex;position:relative}.grid-cell.move-target{outline:2px dashed var(--ink);outline-offset:-2px;cursor:pointer}.grid-cell.drag-over{background:#26415f1f}.table-group{background:#dcb37b;border-radius:10px;padding:8px;position:relative;box-shadow:0 2px 4px #00000026}.table-group.moving{outline:3px solid var(--ink)}.seats-container{gap:5px;display:grid}.seats-container.n1{grid-template-columns:repeat(1, var(--desk-w))}.seats-container.n2{grid-template-columns:repeat(2, var(--desk-w))}.seats-container.n3{grid-template-columns:repeat(3, var(--desk-w))}.seats-container.n4{grid-template-columns:repeat(2, var(--desk-w))}.seats-container.n4.wide{grid-template-columns:repeat(4, var(--desk-w))}.desk{width:var(--desk-w);min-height:var(--desk-h);background:#ffffff8c;border:2px dashed #64748b;border-radius:6px;justify-content:center;align-items:center;display:flex}.desk.drag-over{background:#d1ffd6;border-color:#1e7e34}body.has-selection .desk.empty{cursor:pointer;background:#d1ffd6e6;border-color:#1e7e34}.tbtn{height:28px;min-height:0;font:bold 13px var(--font-sans);text-align:center;cursor:pointer;z-index:10;user-select:none;white-space:nowrap;background:var(--ink);color:#fff;border:2px solid #fff;border-radius:999px;padding:0 10px;line-height:24px;position:absolute}.tbtn.seats{top:-14px;left:-6px}.tbtn.del{background:#b91c1c;width:28px;padding:0;font-size:18px;top:-14px;right:-6px}.tbtn.move{cursor:grab;bottom:-14px;left:50%;transform:translate(-50%)}.add-cell{color:var(--ink);border:2px dashed var(--ink);background:#fff}.board{color:#f0f0f0;text-align:center;font-family:var(--font-marelle);font-synthesis:none;letter-spacing:0;user-select:none;background:#203a27;border:8px solid #5c3a21;border-radius:8px;padding:8px 20px;font-size:26px;font-weight:400;line-height:1.5;box-shadow:inset 0 0 10px #00000080,0 4px 6px #00000026}.room.board-bottom .board,.room.board-top .board{align-self:center;width:80%;min-width:260px;max-width:600px;margin:16px 0}.room.board-left .board,.room.board-right .board{writing-mode:vertical-rl;justify-content:center;align-items:center;margin:0 6px;padding:20px 8px;display:flex}.student{color:var(--ink);border:2px solid var(--ink);cursor:grab;text-align:center;user-select:none;z-index:5;-webkit-hyphens:auto;hyphens:auto;hyphenate-limit-chars:6 3 3;overflow-wrap:break-word;background:#fff;border-radius:8px;width:90px;padding:5px 4px 6px;font-size:14px;font-weight:700;line-height:1.25;position:relative;box-shadow:0 1px 3px #0003}.student:active{cursor:grabbing}.student.selected{box-shadow:0 0 0 2px #fff, 0 0 0 5px var(--orange-ring)}.student.dragging{opacity:.5}.tags{flex-wrap:wrap;justify-content:center;gap:3px;margin-top:4px;display:flex}.tag{border:1px solid #0006;border-radius:6px;padding:1px 6px;font-size:12px;font-weight:700;line-height:1.3;display:inline-block}.legend-item .tag,.sel-tag .tag,.imp-preview .tag{padding:2px 7px;font-size:13px}@keyframes popIn{0%{opacity:.5;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.animate-drop{animation:.3s cubic-bezier(.175,.885,.32,1.275) forwards popIn}@media (prefers-reduced-motion:reduce){.animate-drop{animation:none}#toast{transition:none}}dialog{width:min(900px,94vw);max-height:90vh;color:var(--ink);font:15px/1.4 var(--font-sans);border:none;border-radius:16px;padding:20px;overflow:auto;box-shadow:0 10px 40px #0000004d}dialog::backdrop{background:#0f172a80}dialog h2{margin:0 0 8px;font-size:26px}.hint{color:var(--muted);margin:8px 0;font-size:14px}.dialog-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;margin-top:16px;display:flex}dialog input[type=text],dialog input[type=number],dialog select,dialog textarea{border:2px solid var(--line);min-height:40px;font:15px var(--font-sans);color:var(--ink);background:#fff;border-radius:12px;padding:6px 10px}.form-grid{grid-template-columns:220px 1fr;align-items:center;gap:10px 12px;max-width:560px;display:grid}.form-grid label{font-weight:700}.form-grid input[type=number]{width:90px}.tag-head,.tag-row{grid-template-columns:44px 110px 1fr 240px 100px;align-items:center;gap:8px;display:grid}.tag-head{color:var(--muted);margin-bottom:6px;font-size:13px;font-weight:700}.tag-row{border-top:1px solid #e2e8f0;padding:6px 0}.tag-row input[type=color]{border:2px solid var(--line);background:#fff;border-radius:12px;width:44px;height:40px;padding:2px}.tag-row button{padding:4px 8px}#importText{resize:vertical;width:100%;margin-top:4px}label.block{margin-top:10px;font-weight:700;display:block}details{margin:8px 0}summary{cursor:pointer;color:var(--ink);font-weight:700;text-decoration:underline}.import-summary{margin:10px 0 6px;font-weight:700}.imp-preview{background:var(--bg);border:1px solid #e2e8f0;border-radius:12px;padding:6px 10px;font-size:14px}.imp-preview div{flex-wrap:wrap;align-items:center;gap:6px;padding:3px 0;display:flex}.imp-unk{color:var(--muted);font-style:italic}.imp-unknown{margin-top:8px}.imp-unk-row{padding:4px 0;display:block}.imp-unk-row input,.imp-mode input{vertical-align:middle;width:18px;height:18px}.imp-mode{flex-wrap:wrap;gap:20px;margin-top:10px;display:flex}#toast{background:var(--ink);color:#fff;text-align:center;opacity:0;pointer-events:none;z-index:1000;border-radius:12px;max-width:90vw;padding:10px 18px;font-size:15px;transition:opacity .25s;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}#toast.show{opacity:1}.print-only{display:none}@media print{*{-webkit-print-color-adjust:exact!important;print-color-adjust:exact!important}html,body{background:#fff!important;margin:0!important;padding:0!important}body{height:auto;display:block!important}.no-print,.sidebar,.tbtn,.add-cell,#toast{display:none!important}.print-only{display:block}.container{display:block;overflow:visible}.classroom-container{background:0 0;border:0;flex-direction:column;align-items:center;padding:0;display:flex;overflow:visible}#printTitle{text-align:center;color:var(--ink);margin:0 0 8px;font-size:30px}#legend{margin-bottom:8px}#roomFit{overflow:hidden}.classroom{background:0 0}.grid-cell{outline:none!important}.table-group{box-shadow:none;break-inside:avoid;outline:none!important}.student{box-shadow:none!important;outline:none!important}.desk,.desk.empty{background-color:#ffffffb3!important;border:2px dashed #64748b!important}.board{box-shadow:none}}