:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}body{margin:0}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}:root{--font-sans:"Inter", system-ui, -apple-system, sans-serif;--font-serif:"Sawarabi Mincho", "Hiragino Mincho ProN", serif;--primary:#f43f5e;--primary-hover:#e11d48;--correct:#e11d48;--warning:#d97706;--incorrect:#2563eb;--bg-app:#fafaf9;--bg-sidebar:#f5f5f4;--bg-card:#fff;--border-color:#e7e5e4;--text-main:#292524;--text-muted:#78716c;--text-inverse:#fff;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -1px #0000000a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-overlay:0 20px 25px -5px #00000026, 0 10px 10px -5px #0000000a;--radius-sm:8px;--radius-md:12px;--radius-lg:20px}[data-theme=dark]{--bg-app:#0c0a09;--bg-sidebar:#1c1917;--bg-card:#262220;--border-color:#3f3f46;--text-main:#f5f5f4;--text-muted:#a8a29e;--text-inverse:#0c0a09;--primary:#fb7185;--primary-hover:#fda4af;--correct:#fb7185;--warning:#fbbf24;--incorrect:#60a5fa;--shadow-sm:0 1px 2px 0 #00000080;--shadow-md:0 4px 6px -1px #0000004d, 0 2px 4px -1px #0003;--shadow-lg:0 10px 15px -3px #0006, 0 4px 6px -2px #0000004d}*{box-sizing:border-box;margin:0;padding:0;transition:background-color .3s,border-color .3s}body{font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-main);overflow-x:hidden}#root{flex-direction:column;min-height:100svh;display:flex;border-inline:none!important;width:100%!important;max-width:100%!important}.app-container{width:100vw;height:100vh;display:flex;overflow:hidden}.sidebar{background-color:var(--bg-sidebar);border-right:1px solid var(--border-color);flex-direction:column;flex-shrink:0;width:320px;height:100%;display:flex}.sidebar-header{border-bottom:1px solid var(--border-color);align-items:center;gap:12px;padding:24px;display:flex}.logo-icon{color:var(--primary);justify-content:center;align-items:center;display:flex}.logo-text{letter-spacing:-.5px;color:var(--text-main);font-size:20px;font-weight:800}.logo-sub{color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;margin-top:-2px;font-size:11px;font-weight:500}.sidebar-content{flex-direction:column;flex:1;gap:28px;padding:24px;display:flex;overflow-y:auto}.section-title{text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);margin-bottom:12px;font-size:12px;font-weight:700}.api-status-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);flex-direction:column;gap:12px;padding:16px;display:flex}.status-badge{align-items:center;gap:6px;font-size:13px;font-weight:600;display:inline-flex}.status-dot{border-radius:50%;width:8px;height:8px}.status-dot.success{background-color:#10b981;box-shadow:0 0 8px #10b981}.status-dot.danger{background-color:#ef4444;box-shadow:0 0 8px #ef4444}.api-input-group{flex-direction:column;gap:6px;display:flex}.api-input-group label{color:var(--text-muted);font-size:12px;font-weight:600}.input-with-icon{align-items:center;display:flex;position:relative}.input-icon{color:var(--text-muted);pointer-events:none;position:absolute;left:12px}.api-input{border-radius:var(--radius-sm);border:1px solid var(--border-color);background-color:var(--bg-app);width:100%;color:var(--text-main);outline:none;padding:10px 12px 10px 38px;font-size:14px}.api-input:focus{border-color:var(--primary);box-shadow:0 0 0 2px #f43f5e26}.btn{border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;width:100%;padding:12px 16px;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background-color:var(--primary);color:var(--text-inverse)}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 4px 12px #f43f5e40}.btn-secondary{background-color:var(--bg-card);color:var(--text-main);border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.btn-secondary:hover{background-color:var(--bg-sidebar)}.btn-danger{color:#ef4444;background-color:#ef44441a}.btn-danger:hover{background-color:#ef444433}.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none!important;transform:none!important}.setting-item{justify-content:space-between;align-items:center;padding:10px 0;display:flex}.setting-label{flex-direction:column;gap:2px;display:flex}.setting-title{color:var(--text-main);font-size:14px;font-weight:600}.setting-desc{color:var(--text-muted);font-size:11px}.switch{width:44px;height:24px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:var(--border-color);border-radius:24px;transition:all .3s;position:absolute;inset:0}.slider:before{content:"";background-color:#fff;border-radius:50%;width:18px;height:18px;transition:all .3s;position:absolute;bottom:3px;left:3px}input:checked+.slider{background-color:var(--primary)}input:checked+.slider:before{transform:translate(20px)}.theme-toggle-container{border-top:1px solid var(--border-color);padding:16px 24px}.main-viewport{background-color:var(--bg-app);flex-direction:column;flex:1;height:100%;display:flex;overflow:hidden}.top-bar{border-bottom:1px solid var(--border-color);background-color:var(--bg-card);flex-shrink:0;justify-content:space-between;align-items:center;height:70px;padding:0 24px;display:flex}.top-bar-title{font-size:18px;font-weight:700}.viewport-body{flex:1;display:flex;position:relative;overflow:hidden}.empty-state{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:40px;display:flex;overflow-y:auto}.drop-zone{border:2px dashed var(--border-color);border-radius:var(--radius-lg);background-color:var(--bg-card);width:100%;max-width:500px;box-shadow:var(--shadow-md);cursor:pointer;flex-direction:column;align-items:center;gap:20px;padding:48px 32px;transition:all .3s;display:flex}.drop-zone:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-2px)}.drop-icon-wrapper{width:80px;height:80px;color:var(--primary);background-color:#f43f5e14;border-radius:50%;justify-content:center;align-items:center;font-size:32px;display:flex}.drop-title{font-size:18px;font-weight:700}.drop-desc{color:var(--text-muted);font-size:14px}.hidden-file-input{display:none}.demo-suggestion-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);text-align:left;align-items:center;gap:16px;max-width:500px;margin-top:32px;padding:16px 24px;display:flex}.demo-suggestion-text h4{margin-bottom:2px;font-size:14px;font-weight:700}.demo-suggestion-text p{color:var(--text-muted);font-size:12px}.canvas-section{background-color:#e2e8f0;flex:1;justify-content:center;align-items:center;padding:24px;display:flex;position:relative;overflow:hidden}[data-theme=dark] .canvas-section{background-color:#0f172a}.canvas-wrapper{max-width:100%;max-height:100%;box-shadow:var(--shadow-lg);border-radius:var(--radius-md);background-color:var(--bg-card);position:relative;overflow:hidden}.grading-image{-webkit-user-select:none;user-select:none;pointer-events:none;width:auto;max-width:100%;height:auto;max-height:80vh;display:block}.svg-overlay{pointer-events:auto;width:100%;height:100%;position:absolute;top:0;left:0}.marking-group{cursor:pointer;pointer-events:auto}.marking-box{fill:none;stroke-width:2px;transition:all .2s}.marking-group:hover .marking-box{stroke-width:3px}.marking-circle{fill:none;stroke:var(--correct);stroke-width:4px;stroke-linecap:round;transition:all .2s}.marking-x{fill:none;stroke:var(--incorrect);stroke-width:4px;stroke-linecap:round;stroke-linejoin:round}.marking-triangle{fill:none;stroke:var(--warning);stroke-width:4px;stroke-linejoin:round;stroke-linecap:round}.marking-group:hover .marking-circle{stroke-width:6px;filter:drop-shadow(0 0 6px #e11d4866)}.marking-group:hover .marking-x{stroke-width:6px;filter:drop-shadow(0 0 6px #2563eb66)}.marking-group:hover .marking-triangle{stroke-width:6px;filter:drop-shadow(0 0 6px #d9770666)}.marking-group.selected .marking-box{stroke-dasharray:4;animation:1s linear infinite dash}@keyframes dash{to{stroke-dashoffset:-8px}}.grade-tooltip{z-index:100;-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-md);width:260px;box-shadow:var(--shadow-lg);pointer-events:auto;color:#1c1917;background:#ffffffd9;border:1px solid #ffffff4d;padding:16px;transition:opacity .2s,transform .2s;position:absolute;transform:translate(-50%,-100%)translateY(-12px)}[data-theme=dark] .grade-tooltip{color:#f5f5f4;background:#262220d9;border:1px solid #ffffff1a}.tooltip-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-bottom:8px;padding-bottom:8px;display:flex}.tooltip-title{font-size:16px;font-weight:800;font-family:var(--font-serif)}.tooltip-badge{text-transform:uppercase;border-radius:12px;padding:2px 8px;font-size:11px;font-weight:700}.tooltip-badge.correct{color:var(--correct);background-color:#e11d481a}.tooltip-badge.warning{color:var(--warning);background-color:#d977061a}.tooltip-badge.incorrect{color:var(--incorrect);background-color:#2563eb1a}.tooltip-body{color:var(--text-main);margin-bottom:12px;font-size:13px;line-height:1.4}.tooltip-actions{gap:8px;display:flex}.tooltip-btn{border-radius:var(--radius-sm);border:1px solid var(--border-color);background-color:var(--bg-card);color:var(--text-main);cursor:pointer;text-align:center;flex:1;padding:6px 8px;font-size:11px;font-weight:600;transition:all .2s}.tooltip-btn:hover{background-color:var(--border-color)}.edit-popup{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-overlay);z-index:110;flex-direction:column;gap:16px;width:320px;padding:20px;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.edit-popup-title{align-items:center;gap:8px;font-size:16px;font-weight:700;display:flex}.edit-grade-options{gap:8px;display:flex}.grade-option-btn{border-radius:var(--radius-sm);border:1px solid var(--border-color);background-color:var(--bg-app);color:var(--text-main);cursor:pointer;flex-direction:column;flex:1;align-items:center;gap:4px;padding:8px;font-size:12px;font-weight:600;transition:all .2s;display:flex}.grade-option-btn.active.correct{border-color:var(--correct);color:var(--correct);background-color:#e11d481a}.grade-option-btn.active.warning{border-color:var(--warning);color:var(--warning);background-color:#d977061a}.grade-option-btn.active.incorrect{border-color:var(--incorrect);color:var(--incorrect);background-color:#2563eb1a}.edit-feedback-textarea{border:1px solid var(--border-color);border-radius:var(--radius-sm);background-color:var(--bg-app);width:100%;height:80px;color:var(--text-main);resize:none;outline:none;padding:8px;font-size:13px}.edit-feedback-textarea:focus{border-color:var(--primary)}.edit-actions{gap:8px;display:flex}.scanner-container{pointer-events:none;justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:absolute;top:0;left:0}.scanner-line{background:linear-gradient(to right, transparent, var(--primary), transparent);width:100%;height:4px;box-shadow:0 0 12px var(--primary);animation:2s linear infinite scan;position:absolute;left:0}@keyframes scan{0%{top:0%}50%{top:100%}to{top:0%}}.analysis-spinner{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border-radius:var(--radius-md);color:#fff;z-index:10;box-shadow:var(--shadow-lg);text-align:center;background:#000000b3;flex-direction:column;align-items:center;gap:16px;max-width:280px;padding:24px;display:flex}.spinner{border:3px solid #ffffff4d;border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:1s ease-in-out infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.grading-panel{background-color:var(--bg-card);border-left:1px solid var(--border-color);flex-direction:column;flex-shrink:0;width:360px;height:100%;display:flex}.panel-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.panel-title{font-size:16px;font-weight:700}.stats-container{gap:8px;display:flex}.stat-pill{background-color:var(--bg-sidebar);border-radius:20px;padding:4px 8px;font-size:11px;font-weight:700}.stat-pill.correct{color:var(--correct);background-color:#e11d4814}.stat-pill.warning{color:var(--warning);background-color:#d9770614}.stat-pill.incorrect{color:var(--incorrect);background-color:#2563eb14}.score-banner{border-bottom:1px solid var(--border-color);background:linear-gradient(135deg,#f43f5e0d,#aa3bff0d);justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.score-info h4{text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px;font-size:12px}.score-value{color:var(--correct);font-size:28px;font-weight:800;font-family:var(--font-sans)}.score-total{color:var(--text-muted);font-size:16px;font-weight:500}.graded-list{flex-direction:column;flex:1;gap:12px;padding:16px 24px;display:flex;overflow-y:auto}.graded-item{border-radius:var(--radius-md);border:1px solid var(--border-color);background-color:var(--bg-app);cursor:pointer;align-items:flex-start;gap:12px;padding:12px;transition:all .2s;display:flex}.graded-item:hover{border-color:var(--primary);background-color:var(--bg-card);box-shadow:var(--shadow-sm);transform:translate(-2px)}.graded-item.selected{border-color:var(--primary);background-color:var(--bg-card);box-shadow:var(--shadow-md)}.item-badge{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:16px;font-weight:800;display:flex}.item-badge.correct{color:var(--correct);background-color:#e11d481a}.item-badge.warning{color:var(--warning);background-color:#d977061a}.item-badge.incorrect{color:var(--incorrect);background-color:#2563eb1a}.item-content{flex-direction:column;flex:1;gap:4px;display:flex}.item-kanji-row{align-items:center;gap:8px;display:flex}.item-kanji{font-size:18px;font-weight:700;font-family:var(--font-serif)}.item-index{color:var(--text-muted);font-size:11px}.item-feedback{color:var(--text-muted);font-size:12px;line-height:1.4}.panel-footer{border-top:1px solid var(--border-color);flex-direction:column;gap:8px;padding:20px 24px;display:flex}@media print{.sidebar,.grading-panel,.top-bar,.tooltip-actions,.theme-toggle-container,.floating-toolbar{display:none!important}.app-container,.main-viewport{width:100%;height:auto;overflow:visible}.canvas-section{padding:0;background-color:#fff!important}.canvas-wrapper{box-shadow:none;border-radius:0}.grading-image{width:100%;max-height:100%}}.floating-toolbar{-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-md);pointer-events:auto;z-index:10;background:#fffc;border:1px solid #ffffff4d;border-radius:30px;align-items:center;gap:16px;padding:8px 16px;display:flex}[data-theme=dark] .floating-toolbar{background:#262220cc;border:1px solid #ffffff1a}.toolbar-btn{color:var(--text-main);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:6px;transition:all .2s;display:flex}.toolbar-btn:hover{background-color:var(--border-color)}.toolbar-divider{background-color:var(--border-color);width:1px;height:20px}.toolbar-slider-group{color:var(--text-muted);align-items:center;gap:8px;font-size:12px;font-weight:600;display:flex}.toolbar-slider{cursor:pointer;width:80px;accent-color:var(--primary)}