:root{--primary: #6366f1;--primary-dark: #4f46e5;--secondary: #8b5cf6;--accent: #a78bfa;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--bg-dark: #0f0f1a;--glass-bg: rgba(255, 255, 255, .07);--glass-border: rgba(255, 255, 255, .15);--glass-hover: rgba(255, 255, 255, .12);--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--shadow-glow: 0 0 30px rgba(99, 102, 241, .3)}*,*:before,*:after{box-sizing:border-box}html,body{height:100%;margin:0;padding:0;font-family:Noto Sans KR,Inter,sans-serif;background:var(--bg-dark);color:var(--text-primary);overflow:hidden}.app-bg{background:linear-gradient(135deg,#0f0f1a,#1a0f2e 40%,#0f1a2e);min-height:100vh}.glass{background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:16px}.glass-sm{background:var(--glass-bg);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid var(--glass-border);border-radius:10px}.glass:hover{background:var(--glass-hover)}.nav-header{position:sticky;top:0;background:#0f0f1ad9;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border);padding:0 24px;height:60px;display:flex;align-items:center;gap:16px;z-index:100}.nav-logo{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap}.nav-link{display:flex;align-items:center;gap:6px;padding:6px 14px;border-radius:8px;color:var(--text-secondary);text-decoration:none;font-size:.875rem;font-weight:500;transition:all .2s}.nav-link:hover{color:var(--text-primary);background:var(--glass-hover)}.nav-link.active{color:var(--primary);background:#6366f126}.sidebar{width:260px;min-width:260px;height:calc(100vh - 60px);display:flex;flex-direction:column;gap:0;overflow:hidden;border-right:1px solid var(--glass-border);background:#0f0f1a99}.dropzone{margin:12px;border:2px dashed rgba(99,102,241,.4);border-radius:12px;padding:20px 12px;text-align:center;cursor:pointer;transition:all .3s;background:#6366f10d}.dropzone:hover,.dropzone.drag-over{border-color:var(--primary);background:#6366f11f;box-shadow:inset 0 0 20px #6366f11a}.dropzone .material-icons-round{font-size:36px;color:var(--primary)}#thumbnail-list{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;padding:8px;display:flex;flex-direction:column;gap:6px}.thumbnail-item{cursor:pointer;border-radius:10px;border:2px solid transparent;transition:all .2s;overflow:hidden;position:relative;flex-shrink:0;background:#ffffff0a}.thumbnail-item:hover{border-color:#6366f180;background:#6366f114}.thumbnail-item.active{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary),0 0 16px #6366f14d}.thumbnail-item img.thumb-img{width:auto;max-width:100%;display:block;border-radius:6px}.thumbnail-item .thumb-box-canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border-radius:6px;pointer-events:none}.thumbnail-num{position:absolute;bottom:4px;left:6px;background:#0009;color:#fff;font-size:11px;padding:1px 5px;border-radius:4px}.main-viewer{flex:1;display:flex;flex-direction:column;height:calc(100vh - 60px);overflow:hidden}.toolbar{display:flex;align-items:center;gap:8px;padding:10px 16px;border-bottom:1px solid var(--glass-border);background:#0f0f1ab3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);flex-wrap:wrap}.toolbar .separator{width:1px;height:28px;background:var(--glass-border);margin:0 4px}#canvas-wrapper{flex:1;overflow:auto;display:flex;align-items:flex-start;justify-content:center;padding:20px;background:radial-gradient(ellipse at center,rgba(99,102,241,.05) 0%,transparent 70%)}#canvas-container{box-shadow:0 20px 60px #00000080,0 0 0 1px #ffffff0d;border-radius:4px}.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:9px;font-size:.8125rem;font-weight:600;cursor:pointer;transition:all .2s;border:none;outline:none;white-space:nowrap}.btn .material-icons-round{font-size:18px}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;box-shadow:0 4px 12px #6366f14d}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 16px #6366f166}.btn-primary:active{transform:translateY(0)}.btn-ghost{background:var(--glass-bg);color:var(--text-secondary);border:1px solid var(--glass-border)}.btn-ghost:hover{background:var(--glass-hover);color:var(--text-primary)}.btn-ghost.active{background:#6366f12e;border-color:#6366f166;color:#818cf8}.btn-success{background:linear-gradient(135deg,#059669,#10b981);color:#fff;box-shadow:0 4px 12px #10b98140}.btn-success:hover{transform:translateY(-1px);box-shadow:0 6px 16px #10b98159}.btn-warning{background:linear-gradient(135deg,#d97706,#f59e0b);color:#fff}.btn-warning:hover{transform:translateY(-1px)}.btn-danger{background:linear-gradient(135deg,#dc2626,#ef4444);color:#fff}.btn-danger:hover{transform:translateY(-1px)}.btn-active{background:#6366f140!important;color:var(--accent)!important;border-color:var(--primary)!important}.btn:disabled{opacity:.4;cursor:not-allowed;transform:none!important}.status-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600}.status-idle{background:#64748b33;color:#94a3b8}.status-detecting{background:#f59e0b26;color:#fbbf24;animation:pulse-badge 1.5s infinite}.status-done{background:#10b98126;color:#34d399}.status-error{background:#ef444426;color:#f87171}@keyframes pulse-badge{0%,to{opacity:1}50%{opacity:.6}}#toast-container{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:8px;z-index:9999;pointer-events:none}.toast{display:flex;align-items:center;gap:10px;padding:12px 18px;border-radius:12px;font-size:.875rem;font-weight:500;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid;pointer-events:all;animation:toast-in .3s ease-out;min-width:260px;max-width:380px;box-shadow:0 8px 24px #0006}.toast-success{background:#059669e6;border-color:#10b98180;color:#fff}.toast-error{background:#b91c1ce6;border-color:#ef444480;color:#fff}.toast-info{background:#4338cae6;border-color:#6366f180;color:#fff}.toast-warning{background:#b45309e6;border-color:#f59e0b80;color:#fff}.toast .material-icons-round{font-size:20px}@keyframes toast-in{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes toast-out{0%{transform:translate(0);opacity:1}to{transform:translate(100%);opacity:0}}#modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:1000}#modal-overlay.show{display:flex}.modal-card{background:#191632f2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--glass-border);border-radius:20px;padding:28px;width:90%;max-width:480px;box-shadow:0 30px 80px #00000080,var(--shadow-glow);animation:modal-in .25s ease-out}@keyframes modal-in{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.modal-title{font-size:1.125rem;font-weight:700;margin:0 0 20px}.input-glass{background:#ffffff12;border:1px solid rgba(255,255,255,.15);border-radius:10px;color:var(--text-primary);font-size:.875rem;padding:9px 14px;outline:none;transition:all 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transparent;color:var(--text-secondary)}.source-item:hover{background:var(--glass-hover);border-color:var(--glass-border);color:var(--text-primary)}.source-item.active{background:#6366f126;border-color:#6366f166;color:var(--primary)}.source-item .material-icons-round{font-size:20px}.question-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;padding:16px}.question-card{border-radius:12px;border:2px solid var(--glass-border);overflow:hidden;cursor:pointer;transition:all .2s;background:#ffffff0a;position:relative}.question-card:hover{border-color:#6366f180;box-shadow:0 4px 16px #6366f133}.question-card.selected{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary),0 4px 16px #6366f14d}.question-card img{width:100%;display:block;background:#fff}.question-card .checkbox-overlay{position:absolute;top:8px;left:8px;width:22px;height:22px;border-radius:6px;background:#00000080;border:2px solid 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#0009;border-radius:2px;padding:56.7px;position:relative;color:#000;font-family:"Noto Serif KR",Batang,serif}.exam-header{border-bottom:2px solid #222;padding-bottom:12px;margin-bottom:14px}.exam-header h1{font-size:18px;font-weight:800;text-align:center;margin:0 0 8px}.exam-meta-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:4px;font-size:12px}.exam-columns{display:flex;gap:22.68px;flex:1}.exam-col{flex:1;display:flex;flex-direction:column;gap:0}.exam-question{break-inside:avoid}.exam-question-num{font-size:12px;font-weight:700;margin-bottom:4px;color:#111}.exam-question-img{width:100%;display:block}.exam-page-num{text-align:center;font-size:11px;padding-top:8px;border-top:1px solid #ccc;color:#555}@keyframes preview-flash{0%{box-shadow:0 0 #6366f100;outline:2px solid rgba(99,102,241,0)}30%{box-shadow:0 0 12px 4px #6366f18c;outline:2px solid rgba(99,102,241,.9)}70%{box-shadow:0 0 8px 2px #6366f159;outline:2px solid rgba(99,102,241,.6)}to{box-shadow:0 0 8px 2px #6366f140;outline:2px solid rgba(99,102,241,.5)}}.preview-item-highlight{border-radius:3px;animation:preview-flash .4s ease forwards;outline:2px solid rgba(99,102,241,.5);box-shadow:0 0 8px 2px #6366f140;transition:outline .2s,box-shadow .2s}.exam-paper-card{border-radius:14px;border:1px solid var(--glass-border);background:var(--glass-bg);padding:18px;transition:all .2s}.exam-paper-card:hover{border-color:#6366f166;background:var(--glass-hover)}.range-slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:4px;border-radius:2px;background:#ffffff1a;outline:none;cursor:pointer}.range-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));cursor:pointer;box-shadow:0 2px 8px #6366f166}.tab-group{display:flex;background:#ffffff0d;border-radius:10px;padding:3px;gap:2px}.tab-btn{flex:1;padding:6px 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.2s}.question-list-item:hover{background:var(--glass-hover);color:var(--text-primary)}.question-list-item:active{cursor:grabbing}.question-list-item.qli-preview-active{background:#4f46e51a;border-left:3px solid #4F46E5}[data-theme=light] .question-list-item.qli-preview-active{background:#4f46e514;border-left-color:#4f46e5}.question-list-item .drag-handle{color:var(--text-muted);cursor:grab}.question-list-item .qli-header{display:flex;align-items:center;gap:4px}.question-list-item .qli-label{flex:1;font-size:.75rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.question-list-item .qli-btns{display:flex;align-items:center;gap:2px;margin-left:auto}.question-list-item img{width:100%;height:auto;object-fit:contain;border-radius:4px;background:#ffffff0f;display:block;max-height:160px}.question-list-item .qli-meta{font-size:.7rem;color:var(--text-muted)}@media print{body{background:#fff!important;overflow:auto!important}.a4-page{width:210mm!important;min-height:297mm!important;padding:15mm!important;margin:0!important;box-shadow:none!important;page-break-after:always}.exam-columns{gap:6mm}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}}@page{size:A4 portrait;margin:0}.hidden{display:none!important}.text-gradient{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.gap-indicator{font-size:.75rem;color:var(--text-muted)}.detection-indicator{display:flex;align-items:center;gap:6px;padding:4px 8px;border-radius:8px;font-size:.75rem}.dot-pulse{width:8px;height:8px;border-radius:50%;background:var(--warning);animation:dot-pulse 1.2s ease-in-out infinite}@keyframes dot-pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.5);opacity:.5}}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:48px 24px;color:var(--text-muted);text-align:center}.empty-state .material-icons-round{font-size:52px;opacity:.4}.empty-state p{font-size:.9rem;max-width:240px;line-height:1.6}.icon-badge{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;flex-shrink:0}.icon-badge .material-icons-round{font-size:20px;color:#fff}.custom-checkbox{width:18px;height:18px;border-radius:5px;border:2px solid rgba(255,255,255,.25);cursor:pointer;transition:all .15s;flex-shrink:0;display:flex;align-items:center;justify-content:center}.custom-checkbox.checked{background:var(--primary);border-color:var(--primary)}.sidebar-search-wrap{position:relative;padding:0 8px 8px;display:flex;align-items:center}.sidebar-search-wrap input{width:100%;background:#ffffff0f;border:1px solid var(--glass-border);border-radius:8px;color:#fff;font-size:.8rem;padding:7px 30px;outline:none;box-sizing:border-box}.sidebar-search-clear{position:absolute;right:15px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center;padding:4px;z-index:10}.sidebar-search-wrap input:focus{border-color:var(--primary);background:#6366f11a;box-shadow:0 0 0 2px #6366f126}.sidebar-search-wrap input::placeholder{color:var(--text-muted)}.sidebar-search-clear:hover{color:var(--text-primary)}.sidebar-search-clear .material-icons-round{font-size:15px}[data-theme=light]{--primary: #4F46E5;--primary-dark: #3730A3;--secondary: #6366F1;--accent: #818CF8;--success: #059669;--warning: #D97706;--danger: #DC2626;--bg-dark: #F7F8FA;--glass-bg: rgba(255, 255, 255, .92);--glass-border: rgba(17, 24, 39, .09);--glass-hover: rgba(255, 255, 255, 1);--text-primary: #111827;--text-secondary:#374151;--text-muted: #6B7280;--shadow-glow: 0 0 24px rgba(79, 70, 229, .12)}[data-theme=light] body,[data-theme=light] .app-bg{background:#f7f8fa;color:var(--text-primary)}[data-theme=light] .btn-primary{background:#4f46e5;color:#fff;box-shadow:0 2px 8px #4f46e547}[data-theme=light] .btn-primary:hover{background:#3730a3;box-shadow:0 4px 14px #4f46e561}[data-theme=light] .btn-success{background:#059669;color:#fff;box-shadow:0 2px 8px #05966940}[data-theme=light] .btn-danger{background:#dc2626;color:#fff;box-shadow:0 2px 8px #dc262640}[data-theme=light] .btn-warning{background:#d97706;color:#fff;box-shadow:0 2px 8px #d9770640}[data-theme=light] .nav-header{background:#fffffff2!important;border-bottom:1px solid rgba(17,24,39,.09)!important;box-shadow:0 1px 3px #1118270f}[data-theme=light] .nav-link{color:var(--text-secondary)}[data-theme=light] .nav-link:hover{color:#4f46e5;background:#4f46e512}[data-theme=light] .nav-link.active{color:#4f46e5;background:#4f46e517;font-weight:600}[data-theme=light] .sidebar{background:#f1f3f7!important;border-right:1px solid rgba(17,24,39,.09)!important}[data-theme=light] .toolbar{background:#fffffff7!important;border-bottom:1px solid rgba(17,24,39,.09)!important;box-shadow:0 1px 3px #1118270d}[data-theme=light] .settings-panel{background:#f1f3f7!important;border-left:1px solid rgba(17,24,39,.09)!important}[data-theme=light] .settings-section{background:#fff;border-color:#11182717;box-shadow:0 1px 3px #1118270a}[data-theme=light] .btn-ghost{background:#fff;color:var(--text-secondary);border-color:#11182724}[data-theme=light] .btn-ghost:hover{background:#4f46e50f;color:#4f46e5;border-color:#4f46e54d}[data-theme=light] .source-item{color:var(--text-secondary)}[data-theme=light] .source-item:hover{background:#4f46e512;color:var(--text-primary);border-color:#4f46e540}[data-theme=light] .source-item.active{background:#4f46e51a;border-color:#4f46e5;color:#4f46e5;font-weight:600}[data-theme=light] .question-card{background:#fff;border-color:#1118271a;box-shadow:0 1px 3px #1118270d}[data-theme=light] .question-card:hover{border-color:#4f46e5;box-shadow:0 4px 12px #4f46e524}[data-theme=light] .question-card.selected{border-color:#4f46e5;box-shadow:0 0 0 2px #4f46e559;background:#4f46e50a}[data-theme=light] .selection-bar{background:#fffffffa!important;border-top:1px solid rgba(17,24,39,.09)!important}[data-theme=light] .tab-group{background:#1118270f}[data-theme=light] .tab-btn{color:var(--text-muted)}[data-theme=light] .tab-btn.active{background:#fff;color:#4f46e5;box-shadow:0 1px 4px #1118271a;font-weight:600}[data-theme=light] .input-glass{background:#fff;border-color:#11182724;color:var(--text-primary)}[data-theme=light] .input-glass:focus{background:#fff;border-color:#4f46e5;box-shadow:0 0 0 3px #4f46e51f}[data-theme=light] 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