.itm-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,0.5);z-index:99999;display:none;align-items:center;justify-content:center;padding:1rem}.itm-modal{background:var(--bg-primary,#fff);border-radius:0.75rem;width:100%;max-width:540px;max-height:85vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,0.3)}.itm-header{display:flex;align-items:center;justify-content:space-between;padding:0.875rem 1.25rem;border-bottom:1px solid var(--border,#e2e8f0)}.itm-title{font-weight:700;font-size:0.9375rem;color:var(--text-primary,#0f172a)}.itm-close{background:none;border:none;font-size:1.5rem;line-height:1;color:var(--text-muted,#94a3b8);cursor:pointer}.itm-close:hover{color:var(--text-primary,#0f172a)}.itm-body{padding:1.25rem}.itm-dropzone{border:2px dashed var(--border,#cbd5e1);border-radius:0.5rem;padding:2rem 1rem;text-align:center;cursor:pointer;transition:all 0.15s;background:var(--bg-secondary,#f8fafc)}.itm-dropzone:hover,.itm-dropzone.dragover{border-color:var(--primary,#6366f1);background:rgba(99,102,241,0.04)}.itm-dropzone-icon{font-size:2.5rem;margin-bottom:0.5rem}.itm-dropzone-text{color:var(--text-secondary,#475569);font-size:0.875rem}.itm-browse{color:var(--primary,#6366f1);cursor:pointer;font-weight:600;text-decoration:underline}.itm-dropzone-hint{color:var(--text-muted,#94a3b8);font-size:0.75rem;margin-top:0.375rem}.itm-file-input{position:absolute;width:0;height:0;opacity:0}.itm-pdf-header{font-size:0.875rem;font-weight:600;color:var(--text-primary,#0f172a);margin-bottom:0.75rem}.itm-pdf-pages{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:0.625rem;max-height:320px;overflow-y:auto;padding:0.25rem}.itm-pdf-page{border:2px solid var(--border,#e2e8f0);border-radius:0.5rem;cursor:pointer;text-align:center;padding:0.375rem;transition:all 0.12s;background:var(--bg-primary,#fff)}.itm-pdf-page:hover{border-color:var(--primary,#6366f1)}.itm-pdf-page.selected{border-color:var(--primary,#6366f1);background:rgba(99,102,241,0.04);box-shadow:0 0 0 2px rgba(99,102,241,0.2)}.itm-pdf-thumb{width:100%;height:auto;border-radius:0.25rem;border:1px solid var(--border,#e2e8f0);background:#fff}.itm-pdf-page-num{font-size:0.6875rem;color:var(--text-secondary,#475569);margin-top:0.25rem;font-weight:500}.itm-pdf-actions{display:flex;gap:0.5rem;margin-top:0.875rem;flex-wrap:wrap}.itm-url-row{margin-top:0.75rem}.itm-url-divider{text-align:center;font-size:0.6875rem;color:var(--text-muted,#94a3b8);margin-bottom:0.5rem;position:relative}.itm-url-divider span{background:var(--bg-primary,#fff);padding:0 0.75rem;position:relative;z-index:1}.itm-url-divider::before{content:"";position:absolute;left:0;right:0;top:50%;border-top:1px solid var(--border,#e2e8f0)}.itm-url-input-row{display:flex;gap:0.375rem}.itm-url-input{flex:1;padding:0.4rem 0.625rem;border:1px solid var(--border,#cbd5e1);border-radius:0.375rem;font-size:0.75rem;color:var(--text-primary,#0f172a);background:var(--bg-primary,#fff);outline:none}.itm-url-input:focus{border-color:var(--primary,#6366f1)}.itm-url-input::placeholder{color:var(--text-muted,#94a3b8)}.itm-url-input:disabled{opacity:0.5}.itm-url-btn{padding:0.4rem 0.75rem;background:var(--bg-tertiary,#f1f5f9);color:var(--text-secondary,#475569);border:1px solid var(--border,#cbd5e1);border-radius:0.375rem;font-size:0.75rem;font-weight:500;cursor:pointer;white-space:nowrap}.itm-url-btn:hover{background:var(--border,#e2e8f0);color:var(--text-primary,#0f172a)}.itm-url-btn:disabled{opacity:0.5;cursor:default}[data-theme="dark"] .itm-url-input{background:#0f172a;border-color:#334155;color:#e2e8f0}[data-theme="dark"] .itm-url-divider span{background:var(--bg-primary,#1e293b)}[data-theme="dark"] .itm-url-divider::before{border-top-color:rgba(255,255,255,0.06)}[data-theme="dark"] .itm-url-btn{background:#334155;color:#cbd5e1;border-color:#475569}[data-theme="dark"] .itm-url-btn:hover{background:#475569;color:#fff}.itm-preview{display:flex;align-items:center;gap:0.75rem;padding:0.625rem;background:var(--bg-secondary,#f8fafc);border:1px solid var(--border,#e2e8f0);border-radius:0.5rem;position:relative;margin-top:0.75rem}.itm-preview img{max-width:120px;max-height:80px;border-radius:0.375rem;border:1px solid var(--border,#e2e8f0);object-fit:contain;background:#fff}.itm-preview-info{font-size:0.75rem;color:var(--text-secondary,#475569)}.itm-remove{position:absolute;top:6px;right:6px;background:#ef4444;color:#fff;border:none;border-radius:50%;width:22px;height:22px;font-size:0.8rem;cursor:pointer;display:flex;align-items:center;justify-content:center}.itm-error{padding:0.5rem 0.75rem;background:rgba(239,68,68,0.08);color:#dc2626;border:1px solid rgba(239,68,68,0.2);border-radius:0.375rem;font-size:0.8125rem;margin-top:0.75rem}.itm-scan-btn{margin-top:0.75rem;padding:0.625rem 1.5rem;background:var(--primary,#6366f1);color:#fff;border:none;border-radius:0.5rem;font-size:0.875rem;font-weight:600;cursor:pointer;transition:all 0.12s}.itm-scan-btn:hover:not(:disabled){filter:brightness(1.1)}.itm-scan-btn:disabled{opacity:0.4;cursor:default}.itm-processing{text-align:center;padding:2rem 1rem}.itm-spinner{width:36px;height:36px;margin:0 auto 1rem;border:3px solid var(--border,#e2e8f0);border-top-color:var(--primary,#6366f1);border-radius:50%;animation:itm-spin 0.7s linear infinite}@keyframes itm-spin{to{transform:rotate(360deg)}}.itm-processing-text{font-size:0.875rem;color:var(--text-secondary,#475569);font-weight:500}.itm-quote{margin-top:1.5rem;padding:1rem 1.25rem;background:var(--bg-secondary,#f8fafc);border-radius:0.5rem;border-left:3px solid var(--primary,#6366f1);animation:itm-quote-in 0.4s ease}@keyframes itm-quote-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.itm-quote-text{font-size:0.8125rem;color:var(--text-primary,#0f172a);line-height:1.5;font-style:italic}.itm-quote-author{font-size:0.6875rem;color:var(--text-muted,#94a3b8);margin-top:0.375rem;font-weight:500}[data-theme="dark"] .itm-quote{background:rgba(255,255,255,0.03)}[data-theme="dark"] .itm-quote-text{color:#e2e8f0}.itm-pick-header{font-size:0.875rem;font-weight:600;color:var(--text-primary,#0f172a);margin-bottom:0.75rem}.itm-pick-list{display:flex;flex-direction:column;gap:0.5rem;max-height:300px;overflow-y:auto}.itm-problem{display:flex;align-items:flex-start;gap:0.625rem;padding:0.625rem 0.75rem;border:1px solid var(--border,#e2e8f0);border-radius:0.5rem;cursor:pointer;transition:all 0.12s;background:var(--bg-primary,#fff)}.itm-problem:hover{border-color:var(--primary,#6366f1);background:rgba(99,102,241,0.03)}.itm-problem.selected{border-color:var(--primary,#6366f1);background:rgba(99,102,241,0.06)}.itm-problem-check{padding-top:2px}.itm-problem-cb{accent-color:var(--primary,#6366f1);width:16px;height:16px;cursor:pointer}.itm-problem-content{flex:1;min-width:0}.itm-problem-display{font-size:1rem;color:var(--text-primary,#0f172a);line-height:1.5;overflow-x:auto}.itm-problem-meta{font-size:0.6875rem;color:var(--text-muted,#94a3b8);margin-top:2px}.itm-problem-expr{margin-top:3px}.itm-problem-expr code{font-family:"JetBrains Mono",monospace;font-size:0.75rem;background:var(--bg-tertiary,#f1f5f9);padding:2px 6px;border-radius:3px;color:var(--text-secondary,#475569)}.itm-pick-actions{display:flex;gap:0.5rem;margin-top:0.875rem;flex-wrap:wrap}.itm-btn-primary,.itm-btn{padding:0.5rem 1rem;border-radius:0.375rem;font-size:0.8125rem;font-weight:600;cursor:pointer;transition:all 0.12s;border:none}.itm-btn-primary{background:var(--primary,#6366f1);color:#fff}.itm-btn-primary:hover:not(:disabled){filter:brightness(1.1)}.itm-btn-primary:disabled{opacity:0.4;cursor:default}.itm-btn{background:var(--bg-tertiary,#f1f5f9);color:var(--text-secondary,#475569)}.itm-btn:hover{background:var(--border,#e2e8f0);color:var(--text-primary,#0f172a)}.itm-select-all{display:flex;align-items:center;gap:0.5rem;padding:0.375rem 0.75rem;margin-bottom:0.5rem;font-size:0.8125rem;color:var(--text-secondary,#475569);cursor:pointer;user-select:none}.itm-select-all input{accent-color:var(--primary,#6366f1);width:15px;height:15px;cursor:pointer}.itm-results-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,0.55);z-index:100000;display:none;align-items:flex-start;justify-content:center;padding:2rem 1rem;overflow-y:auto}.itm-results-modal{background:var(--bg-primary,#fff);border-radius:0.75rem;width:100%;max-width:700px;box-shadow:0 20px 60px rgba(0,0,0,0.3);margin:1rem auto}.itm-results-header{display:flex;align-items:center;justify-content:space-between;padding:0.875rem 1.25rem;border-bottom:1px solid var(--border,#e2e8f0)}.itm-results-title{font-weight:700;font-size:0.9375rem;color:var(--text-primary,#0f172a)}.itm-results-body{padding:1.25rem}.itm-result-card{border:1px solid var(--border,#e2e8f0);border-radius:0.5rem;margin-bottom:0.75rem;overflow:hidden;transition:border-color 0.15s}.itm-result-card.solving{border-color:var(--primary,#6366f1)}.itm-result-card.solved{border-color:#22c55e}.itm-result-card.error{border-color:#ef4444}.itm-result-card-header{display:flex;align-items:center;gap:0.625rem;padding:0.625rem 0.875rem;background:var(--bg-secondary,#f8fafc);border-bottom:1px solid var(--border,#e2e8f0);font-size:0.8125rem}.itm-result-num{background:var(--primary,#6366f1);color:#fff;width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.6875rem;font-weight:700;flex-shrink:0}.itm-result-problem{flex:1;min-width:0;overflow-x:auto}.itm-result-status{font-size:0.6875rem;font-weight:600;padding:2px 8px;border-radius:10px;white-space:nowrap}.itm-result-status.pending{background:var(--bg-tertiary,#f1f5f9);color:var(--text-muted,#94a3b8)}.itm-result-status.solving{background:rgba(99,102,241,0.1);color:var(--primary,#6366f1)}.itm-result-status.done{background:rgba(34,197,94,0.1);color:#16a34a}.itm-result-status.fail{background:rgba(239,68,68,0.08);color:#dc2626}.itm-result-card-body{padding:0.75rem 0.875rem;min-height:2.5rem}.itm-result-card-body .itm-spinner{width:20px;height:20px;margin:0.5rem auto}.itm-result-integral{font-size:0.9rem;margin-bottom:0.375rem}.itm-result-answer{font-size:1.05rem;font-weight:500}.itm-result-method{display:inline-block;margin-top:0.375rem;font-size:0.6875rem;padding:2px 8px;background:var(--bg-tertiary,#f1f5f9);color:var(--text-secondary,#475569);border-radius:10px}.itm-result-error-msg{color:#dc2626;font-size:0.8125rem}.itm-result-steps-btn{background:none;border:none;color:var(--primary,#6366f1);font-size:0.75rem;font-weight:600;cursor:pointer;padding:0.25rem 0;margin-top:0.375rem}.itm-result-steps-btn:hover{text-decoration:underline}.itm-result-steps-area{display:none;margin-top:0.5rem;padding:0.625rem;background:var(--bg-secondary,#f8fafc);border-radius:0.375rem;font-size:0.8125rem;overflow-x:auto}.itm-result-steps-area.open{display:block}.itm-result-step{margin-bottom:0.5rem}.itm-result-step-title{font-size:0.6875rem;font-weight:600;color:var(--text-muted,#94a3b8);margin-bottom:2px}.itm-results-footer{display:flex;gap:0.5rem;justify-content:flex-end;padding:0.75rem 1.25rem;border-top:1px solid var(--border,#e2e8f0)}[data-theme="dark"] .itm-modal{background:var(--bg-primary,#1e293b)}[data-theme="dark"] .itm-header{border-bottom-color:rgba(255,255,255,0.06)}[data-theme="dark"] .itm-title{color:#f1f5f9}[data-theme="dark"] .itm-dropzone{border-color:#334155;background:#0f172a}[data-theme="dark"] .itm-dropzone:hover,[data-theme="dark"] .itm-dropzone.dragover{border-color:#6366f1;background:rgba(99,102,241,0.08)}[data-theme="dark"] .itm-preview{background:#0f172a;border-color:#334155}[data-theme="dark"] .itm-problem{background:#0f172a;border-color:#334155}[data-theme="dark"] .itm-problem:hover{border-color:#6366f1;background:rgba(99,102,241,0.06)}[data-theme="dark"] .itm-problem.selected{background:rgba(99,102,241,0.1)}[data-theme="dark"] .itm-problem-display{color:#f1f5f9}[data-theme="dark"] .itm-problem-expr code{background:#334155;color:#cbd5e1}[data-theme="dark"] .itm-btn{background:#334155;color:#cbd5e1}[data-theme="dark"] .itm-btn:hover{background:#475569;color:#fff}[data-theme="dark"] .itm-results-modal{background:var(--bg-primary,#1e293b)}[data-theme="dark"] .itm-results-header{border-bottom-color:rgba(255,255,255,0.06)}[data-theme="dark"] .itm-results-title{color:#f1f5f9}[data-theme="dark"] .itm-result-card{border-color:#334155}[data-theme="dark"] .itm-result-card-header{background:#0f172a;border-bottom-color:#334155}[data-theme="dark"] .itm-result-method{background:#334155;color:#cbd5e1}[data-theme="dark"] .itm-result-steps-area{background:#0f172a}[data-theme="dark"] .itm-results-footer{border-top-color:rgba(255,255,255,0.06)}[data-theme="dark"] .itm-select-all{color:#94a3b8}[data-theme="dark"] .itm-pdf-header{color:#f1f5f9}[data-theme="dark"] .itm-pdf-page{background:#0f172a;border-color:#334155}[data-theme="dark"] .itm-pdf-page:hover{border-color:#6366f1}[data-theme="dark"] .itm-pdf-page.selected{background:rgba(99,102,241,0.08)}[data-theme="dark"] .itm-pdf-thumb{border-color:#334155}@media (max-width:640px){.itm-modal{max-width:100%;margin:0.5rem}.itm-body{padding:0.875rem}.itm-pick-list{max-height:200px}.itm-results-modal{max-width:100%;margin:0.5rem}.itm-results-body{padding:0.875rem}}