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