:root{--primary:#005bac;--accent:#008c95;--warning:#a16207;--danger:#b3261e;--success:#137333;--surface:#fff;--surface-muted:#f5f9fc;--surface-strong:#edf4f8;--border:#d7e1ea;--border-strong:#b9c8d6;--ink:#162033;--muted:#5b667a;--on-primary:#fff;--focus:#8ec5ff;--success-soft:#e5f4e8;--danger-soft:#fceeee;color:var(--ink);background:var(--surface-muted);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Noto Sans JP,Yu Gothic UI,Meiryo,Inter,system-ui,sans-serif}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}.app-shell{min-height:100svh;color:var(--ink);background:linear-gradient(#eef6fb 0,#f7fafc 240px,#f4f7f9 100%)}.topbar{z-index:10;border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffff5;justify-content:space-between;align-items:center;gap:16px;padding:12px 18px;display:flex;position:sticky;top:0;box-shadow:0 10px 28px #16203314}.brand-block{align-items:center;gap:12px;min-width:0;display:flex}.brand-mark{width:38px;height:38px;color:var(--on-primary);background:#0b4e82;border-radius:8px;flex:none;place-items:center;display:grid;box-shadow:inset 0 -10px 18px #00000029}.brand-block h1{margin:0;font-size:1.25rem;line-height:1.2}.brand-block p{color:var(--muted);margin:2px 0 0;font-size:.8125rem}.top-actions,.button-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.workspace{grid-template-columns:minmax(300px,340px) minmax(560px,1fr) minmax(320px,380px);align-items:start;gap:14px;max-width:1680px;margin:0 auto;padding:14px 16px 10px;display:grid}.rail{gap:12px;display:grid}.panel,.board-panel{background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:0 12px 32px #1620330f}.panel{padding:12px}.board-panel{border-top:4px solid #0b4e82;min-width:0;overflow:hidden}.panel-heading,.board-toolbar,.seat-editor{justify-content:space-between;align-items:center;gap:12px;display:flex}.board-toolbar{border-bottom:1px solid var(--border);background:#fbfdff;padding:12px 14px}.board-strip{border-bottom:1px solid var(--border);background:#f4f8fb;justify-content:space-between;align-items:center;gap:12px;padding:9px 14px;display:flex}.view-tabs,.seat-legend{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.view-tabs span,.seat-legend span{white-space:nowrap;border-radius:4px;align-items:center;min-height:26px;padding:4px 8px;font-size:.74rem;font-weight:760;display:inline-flex}.view-tabs span{color:var(--muted);border:1px solid var(--border);background:#fff}.view-tabs .active{color:var(--on-primary);background:#0b4e82;border-color:#0b4e82}.seat-legend span:before{content:"";border-radius:50%;width:8px;height:8px;margin-right:5px}.legend-boy:before{background:#5ea1d9}.legend-girl:before{background:#e58b78}.legend-repeat:before{background:var(--danger)}.legend-fixed:before{background:var(--warning)}.legend-alert:before{background:var(--danger)}.panel-heading{margin-bottom:12px}.panel-heading>:first-child{min-width:0}.kicker{color:var(--primary);text-transform:uppercase;font-size:.6875rem;font-weight:760;line-height:1.2;display:block}h2,h3{color:var(--ink);margin:2px 0 0;font-size:1rem;line-height:1.25}h3{font-size:.95rem}button,input,select,textarea{font:inherit}input,select,textarea{box-sizing:border-box;width:100%;min-width:0;color:var(--ink);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:9px 10px}textarea{resize:vertical}label{color:var(--muted);gap:6px;font-size:.8125rem;font-weight:700;display:grid}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.primary-button,.secondary-button,.danger-button,.icon-button,.text-button{white-space:nowrap;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;gap:7px;min-height:38px;padding:8px 11px;font-size:.875rem;font-weight:760;display:inline-flex}.primary-button{color:var(--on-primary);background:var(--primary)}.secondary-button,.icon-button{color:var(--primary);background:var(--surface);border-color:var(--border-strong)}.danger-button{color:var(--danger);background:var(--danger-soft);border-color:#f2b8b5}.text-button{color:var(--primary);background:0 0;padding-inline:4px}.small-icon{width:32px;height:32px;color:var(--danger);background:var(--surface);border:1px solid var(--border);border-radius:6px;flex:none;place-items:center;display:inline-grid}.field-grid{gap:10px;display:grid}.field-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.student-form{grid-template-columns:1fr .8fr;gap:8px;display:grid}.student-form input[aria-label=メモ],.student-form .primary-button{grid-column:1/-1}.mode-switch{background:var(--surface-strong);border:1px solid var(--border);border-radius:8px;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;margin-bottom:10px;padding:4px;display:grid}.mode-switch button{min-height:36px;color:var(--muted);background:0 0;border:1px solid #0000;border-radius:6px;font-weight:760}.mode-switch button.active{color:var(--on-primary);background:var(--primary)}.mode-note{color:var(--muted);background:var(--surface-strong);border:1px solid var(--border);border-radius:8px;margin:0;padding:10px 11px;font-size:.8125rem;line-height:1.55}.import-area{margin-top:12px}.student-list{gap:8px;max-height:420px;margin-top:12px;padding-right:2px;display:grid;overflow:auto}.student-row{background:var(--surface);border:1px solid var(--border);border-radius:8px;gap:7px;padding:8px;display:grid}.student-row-main,.student-row-controls{align-items:center;gap:6px;display:grid}.student-row-main{grid-template-columns:minmax(0,1fr) 32px}.student-row-controls{grid-template-columns:repeat(3,minmax(0,1fr))}.student-row input,.student-row select{min-height:32px;padding:6px 7px;font-size:.8125rem}.student-row input:read-only{color:var(--primary);background:#f8fbfd;font-weight:760}.number-badge{min-height:32px;color:var(--primary);background:var(--surface-strong);border:1px solid var(--border);border-radius:6px;place-items:center;padding:0 7px;font-size:.6875rem;font-weight:760;display:inline-grid}.metric-row,.metric-column{gap:8px;display:grid}.metric-row{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:12px}.template-tools,.rule-grid{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:8px;margin-top:12px;display:grid}.template-tools .template-select,.rule-grid input{grid-column:1/-1}.compact-list,.detail-list,.reason-list{gap:8px;margin-top:10px;display:grid}.compact-list p,.detail-list p,.reason-list p{color:var(--muted);margin:0;font-size:.78rem}.compact-item{grid-template-columns:minmax(0,1fr) 32px;align-items:center;gap:6px;min-width:0;display:grid}.compact-item>button:first-child,.compact-item>span{min-height:34px;color:var(--ink);text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:6px;gap:2px;padding:7px 9px;font-size:.8rem;font-weight:760;display:grid}.compact-item small,.compact-item span span,.reason-item small,.detail-item span{min-width:0;color:var(--muted);overflow-wrap:anywhere;font-size:.72rem;font-weight:700}.rule-editor{border-top:1px solid var(--border);margin-top:12px;padding-top:10px}.metric{background:var(--surface-strong);border:1px solid var(--border);border-radius:6px;justify-content:space-between;align-items:center;gap:8px;min-height:38px;padding:8px 10px;display:flex}.metric span{color:var(--muted);font-size:.75rem;font-weight:700}.metric strong{color:var(--ink);font-size:.95rem}.status-pill{white-space:nowrap;border-radius:4px;flex:none;align-items:center;gap:5px;min-height:26px;padding:4px 8px;font-size:.75rem;font-weight:760;display:inline-flex}.status-pill.success{color:var(--success);background:var(--success-soft)}.status-pill.danger{color:var(--danger);background:var(--danger-soft)}.status-pill.neutral{color:var(--muted);background:var(--surface-strong)}.seat-grid{--seat-min:78px;background:linear-gradient(#173d3a 0 42px,#0000 42px),#eef3f6;gap:8px;min-height:520px;padding:58px 14px 14px;display:grid;position:relative;overflow:auto}.seat-grid:before{color:#e8fbf4;content:"黒板";letter-spacing:0;pointer-events:none;border:1px solid #e8fbf473;border-radius:4px;place-items:center;width:min(420px,100% - 28px);height:26px;font-size:.8rem;font-weight:760;display:grid;position:absolute;top:12px;left:50%;transform:translate(-50%)}.seat-tile{min-width:var(--seat-min);aspect-ratio:1.08;min-height:84px;color:var(--ink);text-align:left;background:#fbfdff;border:1px solid #cbd8e2;border-radius:8px;flex-direction:column;justify-content:space-between;padding:9px;transition:border-color .12s,box-shadow .12s,transform .12s;display:flex;position:relative;overflow:hidden;box-shadow:0 5px 12px #16203312}.seat-tile strong{color:var(--ink);overflow-wrap:anywhere;font-size:clamp(.75rem,1.5vw,.95rem);line-height:1.2;display:block}.seat-tile span{color:var(--muted);overflow-wrap:anywhere;font-size:.6875rem;line-height:1.25}.seat-tile:hover{border-color:#8bb6d8;transform:translateY(-1px);box-shadow:0 9px 18px #1620331f}.seat-tile .seat-index{color:var(--primary);font-weight:760}.seat-tile.boy{background:linear-gradient(#f7fbff 0,#eaf5ff 100%);border-color:#c2ddef}.seat-tile.girl{background:linear-gradient(snow 0,#fff0ec 100%);border-color:#efc9bd}.seat-tile.blocked{color:#6b7280;background:repeating-linear-gradient(135deg,#eef1f5 0 8px,#e1e6ee 8px 16px)}.seat-tile.fixed{border-color:var(--warning);box-shadow:inset 0 0 0 1px var(--warning)}.seat-tile.repeat{border-color:var(--danger);box-shadow:inset 0 0 0 2px var(--danger)}.seat-tile.alert-target{border-color:var(--danger);box-shadow:inset 0 0 0 2px var(--danger), 0 0 0 3px #b3261e21, 0 9px 18px #1620331f}.seat-tile.alert-horizontal{border-color:#9f1239;box-shadow:inset 0 0 0 2px #9f1239,0 0 0 3px #9f123924,0 9px 18px #1620331f}.seat-tile.alert-neighbor{border-color:#b45309;box-shadow:inset 0 0 0 2px #b45309,0 0 0 3px #b4530924,0 9px 18px #1620331f}.seat-tile.alert-empty{border-style:dashed;border-color:var(--warning);box-shadow:inset 0 0 0 2px #a1620759,0 0 0 3px #a162071f,0 9px 18px #1620331a}.seat-tile.selected{outline:3px solid var(--focus);outline-offset:1px}.seat-alert-badge{background:var(--danger);border-radius:4px;align-items:center;min-height:18px;padding:2px 5px;font-weight:760;line-height:1;display:inline-flex;position:absolute;bottom:6px;right:6px;color:#fff!important;font-size:.62rem!important}.seat-tile.alert-empty .seat-alert-badge,.seat-tile.alert-neighbor .seat-alert-badge{background:var(--warning)}.seat-lock{color:var(--warning);position:absolute;top:7px;right:7px}.seat-editor{border-top:1px solid var(--border);background:#fbfdff;grid-template-columns:minmax(72px,.5fr) auto minmax(170px,1fr);align-items:end;padding:12px 14px;display:grid}.seat-editor p{color:var(--muted);grid-column:2/-1;margin:0;font-size:.875rem}.swap-editor{grid-column:1/-1;grid-template-columns:minmax(180px,1fr) auto;align-items:end;gap:8px;min-width:0;display:grid}.swap-preview{color:var(--muted);border:1px solid var(--border);background:#f3f8fb;border-radius:6px;grid-column:1/-1;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:8px;padding:8px;font-size:.78rem;display:grid}.swap-preview span{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.swap-preview strong{color:var(--primary)}.swap-editor p{color:var(--warning);grid-column:1/-1;font-size:.75rem}.slider-row,.select-row{grid-template-columns:minmax(64px,.35fr) minmax(0,1fr) 44px;align-items:center;gap:8px;margin-top:10px;display:grid}.slider-row input{padding:0}.select-row select{min-height:34px;padding:7px 9px}.slider-row strong,.select-row strong{color:var(--ink);text-align:right}.toggle-line{flex-direction:row;align-items:center;gap:8px;margin-top:12px;display:flex}.toggle-line input{width:18px;height:18px}.empty-result{min-height:108px;color:var(--muted);background:var(--surface-strong);border:1px dashed var(--border-strong);border-radius:8px;place-items:center;gap:8px;display:grid}.empty-result p,.history-list p,.warning-list p{margin:0}.comparison-panel{border-top:4px solid #0b4e82}.warning-panel{border-top:4px solid #b7791f}.comparison-table,.warning-list{gap:7px;display:grid}.comparison-row{border:1px solid var(--border);background:#f8fbfd;border-radius:6px;grid-template-columns:minmax(72px,1.2fr) repeat(3,minmax(50px,.8fr));align-items:center;gap:6px;min-height:34px;padding:7px 8px;font-size:.76rem;display:grid}.comparison-row span{overflow-wrap:anywhere;min-width:0}.comparison-head{color:var(--muted);background:0 0;border-color:#0000;min-height:24px;padding-block:0;font-weight:760}.delta{text-align:center;border-radius:4px;justify-self:start;min-width:42px;padding:3px 6px}.delta.good{color:var(--success);background:var(--success-soft)}.delta.bad{color:var(--danger);background:var(--danger-soft)}.delta.neutral{color:var(--muted);background:var(--surface-strong)}.warning-item{color:#5f3d08;text-align:left;background:#fff7e6;border:1px solid #f0d8a8;border-radius:6px;grid-template-columns:minmax(0,1fr);align-items:center;gap:8px;width:100%;min-height:38px;padding:8px 10px;font-size:.8rem;display:grid}.warning-item span{overflow-wrap:anywhere;min-width:0}.warning-item small{color:#755217;overflow-wrap:anywhere;font-size:.72rem;line-height:1.45}.warning-item.same-seat{color:var(--danger);background:var(--danger-soft);border-color:#f2b8b5}.warning-item.neighbor,.warning-item.horizontal,.warning-item.separation,.warning-item.empty{color:#5f3d08;background:#fff7e6;border-color:#f0d8a8}.warning-item.active,.detail-item.active{border-color:var(--primary);box-shadow:0 0 0 3px #0b4e821f}.detail-item,.reason-item,.migration-status{background:var(--surface-strong);border:1px solid var(--border);border-radius:6px;gap:5px;padding:8px 10px;font-size:.78rem;display:grid}.detail-item strong,.reason-list>strong{color:var(--ink)}.migration-status{grid-template-columns:repeat(3,minmax(0,1fr))}.migration-status p{color:var(--muted);grid-column:1/-1;margin:0;font-size:.76rem}.history-list{gap:8px;max-height:310px;display:grid;overflow:auto}.status-bar{max-width:1680px;color:var(--muted);border-top:1px solid var(--border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffff0;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 14px;margin:0 auto 10px;padding:8px 16px 10px;font-size:.76rem;font-weight:700;display:flex}.status-bar span{background:var(--surface-strong);border:1px solid var(--border);border-radius:4px;align-items:center;min-height:22px;padding:3px 8px;display:inline-flex}.history-item{grid-template-columns:minmax(0,1fr) 32px;align-items:center;gap:6px;display:grid}.history-item>button:first-child{min-height:44px;color:var(--ink);text-align:left;background:var(--surface);border:1px solid var(--border);border-radius:6px;gap:3px;padding:8px 10px;display:grid}.history-item span{color:var(--muted);font-size:.75rem}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width<=1180px){.workspace{grid-template-columns:1fr}.rail{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width>=900px) and (width<=1180px) and (orientation:landscape){.workspace{grid-template-columns:minmax(280px,320px) minmax(0,1fr)}.analytics-rail{grid-column:1/-1;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.seat-grid{--seat-min:66px;min-height:430px}.seat-editor{grid-template-columns:minmax(80px,.45fr) auto minmax(180px,1fr)}}@media (width<=760px){.topbar,.board-toolbar,.seat-editor{flex-direction:column;align-items:stretch}.seat-editor{grid-template-columns:1fr}.seat-editor p{grid-column:auto}.swap-editor{grid-template-columns:1fr}.top-actions,.button-row{width:100%}.top-actions>*,.button-row>*{flex:auto}.workspace{padding:10px}.board-strip{flex-direction:column;align-items:flex-start}.seat-grid{--seat-min:50px;gap:5px;min-height:auto;padding:48px 8px 10px}.seat-grid:before{height:24px;top:10px}.seat-tile{min-height:64px;padding:6px;box-shadow:0 4px 10px #1620330f}.seat-tile strong{font-size:.72rem}.rail{grid-template-columns:1fr}.student-row-controls{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=390px){.student-row-controls{grid-template-columns:1fr}}@media print{.topbar,.rail,.board-toolbar .button-row,.seat-editor{display:none}.app-shell,.workspace,.board-panel{background:#fff;border:0;margin:0;padding:0;display:block}.board-toolbar{border:0;display:block}.seat-grid{background:#fff;padding:8mm;overflow:visible}.seat-tile{break-inside:avoid;border-color:#777;min-height:22mm;box-shadow:none!important}}