.puzzle-grid{background:#fff;border-radius:12px;grid-template-rows:32px 56px 2px repeat(3,84px);grid-template-columns:40px repeat(3,84px) 2px 84px;gap:0;width:fit-content;padding:10px 10px 18px;display:grid;box-shadow:0 2px 10px #0000001a}.puzzle-grid__col-label,.puzzle-grid__row-label{color:#999;text-transform:uppercase;letter-spacing:.5px;justify-content:center;align-items:center;font-size:14px;font-weight:600;display:flex}.puzzle-grid__col-sum,.puzzle-grid__row-sum{color:#555;justify-content:center;align-items:center;margin:2px;font-size:20px;font-weight:700;display:flex}.puzzle-grid__cell{background:#fff;border:2px solid silver;border-radius:6px;justify-content:center;align-items:center;margin:2px;font-size:26px;transition:background .15s;display:flex;position:relative}.puzzle-grid__input{text-align:center;color:#333;-moz-appearance:textfield;background:0 0;border:none;border-radius:4px;outline:none;width:100%;height:100%;font-family:JetBrains Mono,monospace;font-size:24px}.puzzle-grid__input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.puzzle-grid__input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.puzzle-grid__input:focus{background:#e8f0fe}.puzzle-grid__sum-input{text-align:center;color:#555;-moz-appearance:textfield;background:0 0;border:none;border-radius:4px;outline:none;width:100%;height:100%;font-family:JetBrains Mono,monospace;font-size:20px;font-weight:700}.puzzle-grid__sum-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.puzzle-grid__sum-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.puzzle-grid__sum-input:focus{background:#f0f0f0;border-radius:4px}.puzzle-grid__h-separator,.puzzle-grid__v-separator{background:#b0b0b0}.puzzle-grid__cell--given{color:#222;background:#e9ecef;border-color:#b0b0b0;font-weight:700}.puzzle-grid__cell--solved{color:#0c5460;background:#d1ecf1;border-color:#a8d8e8;font-weight:600}.puzzle-grid__cell--empty{color:#bbb;font-size:26px}.puzzle-grid__cell--valid{border-color:#a3d9b1;background:#d4edda!important}.puzzle-grid__row-sum--valid,.puzzle-grid__col-sum--valid{color:#28a745}.puzzle-grid__cell--warn{border-color:#e0c97f;background:#fff3cd!important}.puzzle-grid__row-sum--error,.puzzle-grid__col-sum--error{color:#dc3545}.puzzle-grid__cell--highlight{transition:background .15s,border-color .15s;background:#ffe0b2!important;border-color:#fb8c00!important}.puzzle-grid__row-sum--highlight,.puzzle-grid__col-sum--highlight,.puzzle-grid__label--highlight{color:#e65100!important}.log-panel{width:100%;min-height:80px;max-height:200px;font-family:JetBrains Mono,monospace;font-size:18px;overflow-y:auto}.log-entry{border-left:8px solid;border-radius:2px;margin-bottom:2px;padding:4px 10px;line-height:1.5}.log-auto{color:#666;background:#f0f0f0;border-left-color:#999}.log-info{color:#2a6496;background:#e8f4fd;border-left-color:#4a90d9}.log-error{color:#a71d2a;background:#fdecea;border-left-color:#dc3545}.log-success{color:#1e7e34;background:#eaf7ec;border-left-color:#28a745;font-weight:700}.log-ref{text-underline-offset:3px;cursor:pointer;border-radius:2px;-webkit-text-decoration:underline dotted;text-decoration:underline dotted;transition:background .1s}.log-ref:hover{background:#00000014;text-decoration:underline}.help-panel{background:#fff;border:1px solid #e0e0e0;border-radius:10px;padding:12px 16px;font-size:14px;line-height:1.5;overflow-y:auto;box-shadow:0 1px 4px #0000000f}.help-panel h3{color:#2c3e50;margin:0 0 8px;font-size:15px;font-weight:700}.help-panel table{border-collapse:collapse;width:100%}.help-panel td{vertical-align:top;padding:3px 0}.help-signature{white-space:nowrap;width:1px;padding-right:16px}.help-description{color:#666;font-size:13px}.help-panel .help-note{color:#888;margin-top:8px;font-size:13px;font-style:italic}.hl-keyword{color:#00f}.hl-method{color:#795e26}.hl-param{color:#001080}.hl-punct{color:#333}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:JetBrains Mono,monospace;font-size:16px}.app{background:#f0f4f8;gap:16px;height:100vh;padding:16px 20px;display:flex}.left-panel{flex-direction:column;flex:1;align-items:flex-end;gap:12px;display:flex;overflow:hidden}.right-panel{flex-direction:column;flex:0 66.666%;gap:12px;min-width:0;max-width:66.666%;display:flex}.controls{gap:8px;display:flex}.controls button{cursor:pointer;color:#fff;background:#4a90d9;border:none;border-radius:8px;justify-content:center;align-items:center;gap:6px;width:160px;padding:12px 20px;font-family:JetBrains Mono,monospace;font-size:16px;font-weight:400;transition:background .15s;display:inline-flex;box-shadow:0 1px 3px #0000001f}.controls button:hover{background:#357abd}.controls button:active{background:#2c6aab}.controls button:disabled{cursor:not-allowed;box-shadow:none;background:#ccc}.btn-icon{vertical-align:middle;font-size:1.4em;font-weight:400;line-height:1}.run-button{cursor:pointer;color:#fff;background:#28a745;border:none;border-radius:8px;justify-content:center;align-items:center;gap:6px;width:160px;padding:12px 20px;font-family:JetBrains Mono,monospace;font-size:16px;font-weight:400;transition:background .15s;display:inline-flex;box-shadow:0 2px 6px #28a7454d}.run-button:hover{background:#218838}.run-button:active{background:#1e7e34}.run-button:disabled{cursor:not-allowed;box-shadow:none;background:#ccc}