:root{--bg:#f6f3ee;--surface:#fffdf9;--surface-2:#efe9df;--ink:#26221d;--ink-2:#5d554b;--ink-3:#8a8073;--line:#e2dacd;--line-strong:#cdc2b1;--accent:#7a4b1f;--accent-ink:#fff;--accent-soft:#f1e3d2;--ok:#2f6b3a;--warn:#9a3412;--warn-soft:#fbe9df;--focus:#2f6fd6;--shadow:0 1px 2px #26221d0f, 0 4px 16px #26221d0f;--radius:10px;--serif:"Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;--sans:ui-sans-serif, -apple-system, "Segoe UI", system-ui, Roboto, sans-serif;--mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#1b1916;--surface:#24211d;--surface-2:#2e2a25;--ink:#eee8de;--ink-2:#c2b8aa;--ink-3:#8f8679;--line:#38332d;--line-strong:#4a443c;--accent:#d9a46c;--accent-ink:#1b1916;--accent-soft:#3a2e22;--ok:#8fcf98;--warn:#f0a07a;--warn-soft:#3a2620;--focus:#7fb0ff;--shadow:0 1px 2px #0000004d, 0 4px 16px #00000040;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);font:15px/1.5 var(--sans);-webkit-font-smoothing:antialiased;margin:0}button,input,textarea,select{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.app{grid-template:"top top""side main"1fr/300px minmax(0,1fr);min-height:100vh;display:grid}.topbar{background:var(--surface);border-bottom:1px solid var(--line);z-index:5;grid-area:top;align-items:center;gap:16px;padding:10px 20px;display:flex;position:sticky;top:0}.brand{white-space:nowrap;align-items:center;gap:10px;display:flex}.brand-mark{background:conic-gradient(#857a6a 0 25%, #f1ece2 0 50%, #857a6a 0 75%, #f1ece2 0) 0 0 / 11px 11px;border:1px solid var(--line-strong);border-radius:4px;width:22px;height:22px}.brand-name{font-family:var(--serif);letter-spacing:.01em;font-size:18px;font-weight:600}.sheet-title{min-width:0;max-width:420px;font-family:var(--serif);background:0 0;border:1px solid #0000;border-radius:8px;flex:1;padding:6px 10px;font-size:17px}.sheet-title:hover{border-color:var(--line)}.sheet-title:focus{border-color:var(--line-strong);background:var(--bg);outline:none}.topbar .segmented{margin-left:auto}.sidebar{border-right:1px solid var(--line);flex-direction:column;grid-area:side;gap:16px;max-height:calc(100vh - 57px);padding:16px;display:flex;position:sticky;top:57px;overflow-y:auto}.main{grid-area:main;min-width:0;padding:24px}.btn{border:1px solid var(--line-strong);background:var(--surface);cursor:pointer;white-space:nowrap;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:6px 12px;transition:background .12s,border-color .12s;display:inline-flex}.btn:hover:not(:disabled){background:var(--surface-2)}.btn:disabled{opacity:.45;cursor:default}.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}.btn.primary:hover:not(:disabled){background:var(--accent);filter:brightness(1.08)}.btn.ghost{background:0 0;border-color:#0000}.btn.ghost:hover:not(:disabled){background:var(--surface-2)}.btn.small{padding:3px 8px;font-size:13px}.btn.chip{font-family:var(--mono);border-radius:999px;font-size:12.5px}.segmented{background:var(--surface-2);border-radius:9px;gap:2px;padding:3px;display:inline-flex}.segmented button{cursor:pointer;color:var(--ink-2);white-space:nowrap;background:0 0;border:0;border-radius:7px;padding:5px 12px}.segmented button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow);font-weight:600}.segmented.full{display:flex}.segmented.full button{white-space:normal;flex:1;padding:5px 6px;font-size:13px;line-height:1.25}.icon-btn{cursor:pointer;width:24px;height:24px;color:var(--ink-3);background:0 0;border:0;border-radius:6px;font-size:13px}.icon-btn:hover:not(:disabled){background:var(--surface-2);color:var(--ink)}.icon-btn.danger:hover:not(:disabled){color:var(--warn)}.icon-btn:disabled{opacity:.3;cursor:default}.sidebar-actions{gap:8px;display:flex}.sidebar-actions .btn{flex:1}.diagram-list{flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.diagram-item{border-radius:var(--radius);border:1px solid #0000;position:relative}.diagram-item:hover{background:var(--surface)}.diagram-item.on{background:var(--surface);border-color:var(--line-strong);box-shadow:var(--shadow)}.diagram-select{text-align:left;cursor:pointer;border-radius:var(--radius);background:0 0;border:0;align-items:center;gap:10px;width:100%;padding:8px 56px 8px 8px;display:flex}.thumb{border-radius:3px;flex:none;width:64px;display:block}.diagram-meta{flex-direction:column;gap:2px;min-width:0;display:flex}.diagram-number{color:var(--ink-3);font-variant-numeric:tabular-nums;font-size:12px}.diagram-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:14px;line-height:1.3;display:-webkit-box;overflow:hidden}.badge{border-radius:999px;align-self:flex-start;padding:1px 7px;font-size:11px;font-weight:600}.badge.warn{background:var(--warn-soft);color:var(--warn)}.diagram-actions{opacity:0;grid-template-columns:repeat(2,24px);grid-auto-rows:24px;transition:opacity .12s;display:grid;position:absolute;top:50%;right:4px;transform:translateY(-50%)}.diagram-item:hover .diagram-actions,.diagram-item:focus-within .diagram-actions,.diagram-item.on .diagram-actions{opacity:1}.settings{border:1px solid var(--line);border-radius:var(--radius);flex-direction:column;gap:8px;margin:0;padding:10px 12px 12px;display:flex}.settings legend{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);padding:0 6px;font-size:12px;font-weight:600}.check{cursor:pointer;align-items:center;gap:8px;font-size:14px;display:flex}.check input[type=checkbox],.check input[type=radio]{accent-color:var(--accent);width:16px;height:16px}.ephemeral-note{color:var(--ink-3);text-align:center;margin:auto 0 0;font-size:12.5px;line-height:1.4}.empty{color:var(--ink-2);margin:0;font-size:14px}.editor{grid-template-columns:minmax(280px,560px) minmax(260px,1fr);align-items:start;gap:28px;max-width:1120px;display:grid}.editor-board{flex-direction:column;gap:10px;display:flex}.board-large{width:min(100%,104vh - 239.2px);min-width:280px;box-shadow:var(--shadow);cursor:pointer;border-radius:4px;display:block}.toolbar{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.toolbar-spacer{flex:1}.swatches{gap:6px;display:flex}.swatch{border:2px solid var(--surface);width:20px;height:20px;box-shadow:0 0 0 1px var(--line-strong);cursor:pointer;border-radius:50%;padding:0}.swatch.on{box-shadow:0 0 0 2px var(--ink)}.hint{color:var(--ink-3);margin:0;font-size:13px}.editor-side{flex-direction:column;gap:18px;display:flex}.field{flex-direction:column;gap:6px;display:flex}.field>label,.label{color:var(--ink-2);font-size:13px;font-weight:600}textarea{border:1px solid var(--line-strong);background:var(--surface);resize:vertical;border-radius:8px;width:100%;padding:8px 10px}textarea:focus{border-color:var(--focus);box-shadow:0 0 0 3px color-mix(in srgb, var(--focus) 20%, transparent);outline:none}textarea.notation{font-family:var(--mono);font-size:14px;line-height:1.6}textarea[aria-invalid=true]{border-color:var(--warn)}.problem{background:var(--warn-soft);color:var(--warn);border-radius:8px;padding:8px 10px;font-size:14px}.problem p{margin:0 0 6px}.problem-actions{flex-wrap:wrap;gap:6px;display:flex}.ok{color:var(--ok);margin:0;font-size:13px}.movelist-head{justify-content:space-between;align-items:center;display:flex}.stepper{display:flex}.movelist{border:1px solid var(--line);background:var(--surface);max-height:180px;font-family:var(--mono);border-radius:8px;flex-wrap:wrap;align-items:baseline;gap:2px;margin:0;padding:8px;font-size:14px;list-style:none;display:flex;overflow-y:auto}.movelist li{display:contents}.move-number{color:var(--ink-3);margin-left:6px;font-size:13px}.move{cursor:pointer;background:0 0;border:0;border-radius:5px;padding:1px 5px;font-family:inherit}.move:hover{background:var(--surface-2)}.move.on{background:var(--accent);color:var(--accent-ink)}.move.start{font-family:var(--sans);color:var(--ink-2);font-size:12.5px}.move.start.on{color:var(--accent-ink)}.export-row{border-top:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:6px;padding-top:14px;display:flex}.status{color:var(--ok);font-size:13px}.empty-main{text-align:center;max-width:520px;margin:10vh auto 0}.empty-main h2{font-family:var(--serif);margin:0 0 8px;font-size:26px;font-weight:600}.empty-main p{color:var(--ink-2)}.empty-main .sidebar-actions{justify-content:center}.empty-main .sidebar-actions .btn{flex:none}.toast{background:var(--ink);color:var(--bg);box-shadow:var(--shadow);z-index:10;border-radius:10px;align-items:center;gap:12px;padding:8px 10px 8px 16px;font-size:14px;display:flex;position:fixed;bottom:20px;left:50%;transform:translate(-50%)}.toast .btn{color:inherit;border-color:color-mix(in srgb, var(--bg) 40%, transparent);background:0 0}.preview{justify-content:center;padding-bottom:40px;display:flex;overflow-x:auto}.print-sheet{color:#1d1a16;font-family:var(--serif);flex-direction:column;gap:24px;display:flex}.page{width:210mm;height:297mm;box-shadow:var(--shadow);background:#fff;flex-direction:column;padding:12mm;display:flex;overflow:hidden}.page-head{border-bottom:.4mm solid #1d1a16;justify-content:space-between;align-items:baseline;min-height:7mm;margin-bottom:4mm;padding-bottom:1.5mm;font-size:12pt;display:flex}.page-title{font-weight:600}.page-meta{color:#6b6257;font-size:9pt;font-family:var(--sans)}.page-body{flex:1;min-height:0;display:grid}.layout-grid .page-body{grid-template-rows:repeat(3,minmax(0,1fr));grid-template-columns:1fr 1fr;gap:5mm 8mm}.slot{break-inside:avoid;gap:6mm;min-height:0;display:flex;overflow:hidden}.layout-grid .slot{flex-direction:column;gap:1mm}.layout-grid .slot-figure{align-self:center}.layout-grid .slot-caption{-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:9.5pt;display:-webkit-box;overflow:hidden}.slot-figure{flex-direction:column;flex:none;margin:0;display:flex}.slot-figure>svg{width:auto;height:72mm;display:block}.layout-grid .slot-figure>svg{height:58mm}.slot-figure figcaption{color:#4a433b;align-items:baseline;gap:3mm;width:0;min-width:100%;padding:1mm 0 0 4mm;font-size:9pt;display:flex}.slot-number{color:#1d1a16;font-weight:700}.slot-tomove{margin-left:auto}.slot-notes{flex-direction:column;flex:1;min-width:0;display:flex;overflow:hidden}.slot-caption{white-space:pre-wrap;margin:0 0 1mm;font-size:10.5pt;line-height:1.35}.ruled{flex-direction:column;flex:1;display:flex;overflow:hidden}.ruled span{border-bottom:.25mm solid #c9c1b4;flex:none;height:8mm}.layout-grid .ruled span{height:7mm}.print-only{display:none}@media (width<=900px){.app{grid-template-columns:1fr;grid-template-areas:"top""main""side"}.sidebar{border-right:0;border-top:1px solid var(--line);max-height:none;position:static}.editor{grid-template-columns:1fr}.topbar{flex-wrap:wrap;gap:8px 12px;padding:10px 16px}.main{padding:16px}.sheet-title{flex-basis:100%;order:5;max-width:none}.preview .page{zoom:.45}}@page{size:A4;margin:0}@media print{html,body{background:#fff}.app{display:none}.print-only{display:block}.print-sheet{gap:0}.page{box-shadow:none;break-after:page}.page:last-child{break-after:auto}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}}.setup{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);flex-direction:column;gap:8px;padding:10px;display:flex}.palette{flex-wrap:wrap;align-items:center;gap:6px 12px;display:flex}.palette-row{gap:2px;display:flex}.palette-piece{cursor:pointer;background:#f4f0e6;border:1px solid #0000;border-radius:8px;place-items:center;width:38px;height:38px;padding:0;display:grid}.palette-piece:nth-child(2n){background:#e6dfd1}.palette-piece.on{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent)}.palette-piece.eraser{background:var(--surface-2);width:auto;color:var(--ink-2);padding:0 10px;font-size:13px}.promotion{flex-wrap:wrap;align-items:center;gap:6px;margin-top:10px;display:flex}.setup-row{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.warn-text{color:var(--warn)}.btn.import-btn{border:1px dashed var(--line-strong);margin-top:-8px}.dialog-backdrop{z-index:20;background:#14110e73;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.dialog{background:var(--surface);border-radius:14px;flex-direction:column;gap:14px;width:min(620px,100%);max-height:calc(100vh - 32px);padding:20px 22px;display:flex;overflow-y:auto;box-shadow:0 20px 60px #0000004d}.dialog h2{font-family:var(--serif);margin:0;font-size:22px;font-weight:600}.pick{border:1px solid var(--line);border-radius:var(--radius);flex-direction:column;gap:8px;margin:0;padding:8px 12px 12px;display:flex}.pick legend{color:var(--ink-2);padding:0 6px;font-size:13px;font-weight:600}.pick .check{flex-wrap:wrap}.hint.indent{margin:-6px 0 0 24px}.num,.text{border:1px solid var(--line-strong);background:var(--bg);border-radius:6px;padding:2px 6px}.num{width:56px}.text{width:160px;font-family:var(--mono);font-size:13px}.import-summary{color:var(--ink-2);margin:0;font-size:14px}.dialog-actions{justify-content:flex-end;gap:8px;display:flex}.slot-moves{color:#3d3730;-webkit-line-clamp:3;-webkit-box-orient:vertical;margin:0 0 1.5mm;font-size:9pt;line-height:1.4;display:-webkit-box;overflow:hidden}.layout-grid .slot-moves{-webkit-line-clamp:1;margin-bottom:.5mm}.figurine{vertical-align:-.2em;width:1.15em;height:1.15em;margin-right:-.05em}.branch-btn{color:var(--ink-2);align-self:flex-start;margin-top:-10px;font-size:14px}.cards-head{font-family:var(--sans);color:#8a8073;justify-content:space-between;margin-bottom:3mm;font-size:8pt;display:flex}.cards{border-top:.3mm solid #8a8073;flex:1;grid-template-rows:repeat(4,minmax(0,1fr));display:grid}.card{break-inside:avoid;border-bottom:.3mm solid #8a8073;border-left:.3mm solid #8a8073;border-right:.3mm solid #8a8073;grid-template-columns:1fr 1fr;min-height:0;display:grid;overflow:hidden}.card-face{min-width:0;padding:4mm;overflow:hidden}.card-front{border-right:.3mm dashed #8a8073;gap:3mm;display:flex}.card-front>svg{flex:none;width:auto;height:52mm}.card-front-text{flex-direction:column;gap:1.5mm;min-width:0;display:flex}.card-face p{margin:0}.card-meta{color:#6b6257;align-items:baseline;gap:2mm;font-size:8.5pt;display:flex}.card-number{color:#1d1a16;font-weight:700}.card-tomove{color:#4a433b;font-size:9pt}.card-back{flex-direction:column;gap:1.5mm;display:flex}.card-moves{font-size:10.5pt;line-height:1.4}.card-idea{white-space:pre-wrap;font-size:10pt;line-height:1.35}.card-back-board{align-self:flex-start;width:auto;height:30mm;margin-top:auto}.card-empty-back{color:#a39a8d;font-size:9pt;font-style:italic}.cards-empty{font-family:var(--sans);color:#6b6257;padding:10mm}.eval-guess{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);flex-direction:column;gap:8px;padding:10px 12px;display:flex}.eval-head{justify-content:space-between;align-items:center;display:flex}.verdicts{grid-template-columns:repeat(8,1fr);gap:4px;display:grid}.verdict{border:1px solid var(--line-strong);background:var(--bg);font-family:"Cambria Math", "STIX Two Math", "Apple Symbols", "Segoe UI Symbol", var(--serif);cursor:pointer;border-radius:7px;padding:6px 0;font-size:17px}.verdict:hover{background:var(--surface-2);border-color:var(--accent)}.eval-reveal{flex-direction:column;gap:6px;display:flex}.eval-row{flex-wrap:wrap;align-items:baseline;gap:4px 8px;margin:0;font-size:14px;display:flex}.eval-source{min-width:96px;color:var(--ink-3);font-size:12.5px}.eval-symbol{font-family:"Cambria Math", "STIX Two Math", "Apple Symbols", "Segoe UI Symbol", var(--serif);min-width:22px;font-size:17px;font-weight:600}.eval-score{font-family:var(--mono);color:var(--ink-2);font-size:13px}.eval-feedback{background:var(--surface-2);border-radius:999px;margin-left:auto;padding:1px 8px;font-size:12px;font-weight:600}.eval-feedback.exact{background:color-mix(in srgb, var(--ok) 18%, transparent);color:var(--ok)}.eval-feedback.wrong-side{background:var(--warn-soft);color:var(--warn)}.eval-comment{color:var(--ink-2);margin:0 0 0 104px;font-size:13px}.eval-actions{gap:6px;display:flex}.verdict-symbol{font-family:"Cambria Math", "STIX Two Math", "Apple Symbols", "Segoe UI Symbol", "DejaVu Sans", var(--serif)}.verdict.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.verdict-mark{vertical-align:-.15em;display:inline-block}.verdict .verdict-mark{vertical-align:middle}.eval-depth{color:var(--ink-3);font-family:var(--sans);font-size:11.5px}.notation-hidden{border:1px dashed var(--line-strong);color:var(--ink-3);border-radius:8px;justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;font-size:13.5px;display:flex}.move-hidden{color:var(--ink-3);font-family:var(--sans);margin-left:6px;font-size:12.5px;list-style:none;display:list-item!important}.movelist-foot{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:4px 12px;display:flex}.small-check{color:var(--ink-2);font-size:13px}.eval-head-actions{align-items:center;gap:6px;display:flex}.turning{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);flex-direction:column;gap:6px;padding:10px 12px;display:flex}.turning-list{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.turning-item{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:6px;align-items:baseline;gap:8px;width:100%;padding:4px 6px;display:flex}.turning-item:hover{background:var(--surface-2)}.turning-sev{min-width:18px;color:var(--ink-2);font-weight:700}.turning-sev.blunder{color:var(--warn)}.turning-move{font-family:var(--mono);min-width:72px;font-size:14px}.turning-detail{color:var(--ink-2);font-size:13px}.candidates{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);flex-direction:column;gap:6px;padding:10px 12px;display:flex}.candidate-list{flex-direction:column;gap:3px;margin:0;padding:0;list-style:none;display:flex}.candidate{grid-template-columns:24px 48px 1fr;align-items:baseline;gap:6px;font-size:13.5px;display:grid}.candidate-score{font-family:var(--mono);color:var(--ink-2);text-align:right;font-size:13px}.candidate-line{font-family:var(--mono);color:var(--ink-2);font-size:13px}.candidate-line strong{color:var(--ink)}.turning-add{align-self:flex-start}