:root{--font-sans:"Outfit", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--bg-app:#f8fafc;--bg-card:#fff;--bg-input:#f1f5f9;--text-main:#0f172a;--text-muted:#64748b;--border-color:#e2e8f0;--primary:#185abd;--primary-hover:#104f8a;--primary-light:#deecf9;--success:#10b981;--success-bg:#e6ffec;--success-word:#acf2bd;--danger:#ef4444;--danger-bg:#ffeef0;--danger-word:#fdb8c0;--warning:#f59e0b;--warning-bg:#fffbeb;--placeholder-bg:repeating-linear-gradient(45deg, #f1f5f9, #f1f5f9 10px, #f8fafc 10px, #f8fafc 20px);--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);--shadow-xl:0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--transition:all .3s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-app:#0f172a;--bg-card:#1e293b;--bg-input:#334155;--text-main:#f8fafc;--text-muted:#94a3b8;--border-color:#334155;--primary:#479ef5;--primary-hover:#185abd;--primary-light:#1e3a5f;--success:#34d399;--success-bg:#143525;--success-word:#065f46;--danger:#f87171;--danger-bg:#441d24;--danger-word:#7f1d1d;--warning:#fbbf24;--warning-bg:#451a03;--placeholder-bg:repeating-linear-gradient(45deg, #1e293b, #1e293b 10px, #1b2535 10px, #1b2535 20px)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-main);transition:var(--transition);min-height:100vh;padding-bottom:60px;line-height:1.6}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.app-container{max-width:1600px;margin:0 auto;padding:24px}.app-header{border-bottom:1px solid var(--border-color);flex-wrap:wrap;justify-content:space-between;align-items:center;margin-bottom:32px;padding-bottom:16px;display:flex}.brand{align-items:center;gap:12px;display:flex}.brand-icon{background:linear-gradient(135deg, var(--primary), #2b579a);color:#fff;border-radius:var(--radius-md);justify-content:center;align-items:center;width:42px;height:42px;display:flex;box-shadow:0 4px 12px rgba(24,90,189,.35)}.brand h1{letter-spacing:-.5px;background:linear-gradient(to right, var(--text-main), var(--primary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:24px;font-weight:800}.theme-toggle-btn{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-main);cursor:pointer;box-shadow:var(--shadow-sm);transition:var(--transition);border-radius:50%;justify-content:center;align-items:center;padding:10px;display:flex}.theme-toggle-btn:hover{border-color:var(--primary);color:var(--primary);transform:scale(1.1)rotate(15deg)}.upload-grid{grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px;display:grid}@media (max-width:768px){.upload-grid{grid-template-columns:1fr}}.upload-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:var(--transition);padding:24px;position:relative;overflow:hidden}.upload-card:before{content:"";background:linear-gradient(90deg, var(--primary), transparent);opacity:0;width:100%;height:4px;transition:var(--transition);position:absolute;top:0;left:0}.upload-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.upload-card.active:before{opacity:1}.card-title{align-items:center;gap:8px;margin-bottom:16px;font-size:16px;font-weight:700;display:flex}.card-title .badge{background:var(--primary-light);color:var(--primary);border-radius:12px;padding:2px 8px;font-size:11px;font-weight:500}.upload-zone{border:2px dashed var(--border-color);border-radius:var(--radius-md);text-align:center;cursor:pointer;transition:var(--transition);background:var(--bg-app);padding:32px 16px}.upload-zone:hover,.upload-zone.dragover{border-color:var(--primary);background:var(--primary-light);opacity:.9}[data-theme=dark] .upload-zone:hover,[data-theme=dark] .upload-zone.dragover{background:rgba(99,102,241,.1)}.upload-icon{color:var(--text-muted);transition:var(--transition);margin-bottom:12px}.upload-zone:hover .upload-icon{color:var(--primary);transform:translateY(-4px)}.upload-text{color:var(--text-main);font-size:14px;font-weight:500}.upload-hint{color:var(--text-muted);margin-top:4px;font-size:12px}.file-input{display:none}.file-info-box{background:var(--bg-app);border-radius:var(--radius-sm);border:1px solid var(--border-color);align-items:center;gap:12px;margin-top:16px;padding:12px;animation:.3s slideIn;display:flex}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.file-icon{color:#2b579a}.file-details{flex:1;min-width:0}.file-name{color:var(--text-main);white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:600;overflow:hidden}.file-size{color:var(--text-muted);font-size:11px}.remove-file-btn{color:var(--text-muted);cursor:pointer;transition:var(--transition);background:0 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#4f46e5);color:#fff;border:none;box-shadow:0 4px 14px rgba(99,102,241,.4)}.btn-primary:hover{color:#fff;background:linear-gradient(135deg,#4f46e5,#4338ca);transform:translateY(-1px);box-shadow:0 6px 20px rgba(99,102,241,.5)}.btn-primary:disabled{background:var(--text-muted);opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.btn-accent{color:#fff;background:linear-gradient(135deg,#a855f7,#7c3aed);border:none;box-shadow:0 4px 14px rgba(124,58,237,.4)}.btn-accent:hover{color:#fff;background:linear-gradient(135deg,#9333ea,#6d28d9);transform:translateY(-1px);box-shadow:0 6px 20px rgba(124,58,237,.5)}.segmented-control{background:var(--bg-input);border-radius:var(--radius-md);gap:2px;padding:4px;display:flex}.segmented-btn{color:var(--text-muted);border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);background:0 0;border:none;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:600;display:flex}.segmented-btn.active{background:var(--bg-card);color:var(--text-main);box-shadow:var(--shadow-sm)}.compare-wrapper{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);flex-direction:column;min-height:400px;display:flex;overflow:hidden}.compare-header-bar{background:var(--bg-input);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:12px 24px;display:flex}.doc-path-title{color:var(--text-muted);align-items:center;gap:8px;font-size:13px;font-weight:600;display:flex}.compare-container-split{grid-template-columns:1fr 1fr;display:grid;position:relative;overflow:auto}.compare-container-split:after{content:"";background:var(--border-color);z-index:10;width:1px;position:absolute;top:0;bottom:0;left:50%}.compare-pane,.compare-container-unified{background:var(--bg-card);max-height:70vh;padding:32px;overflow-y:auto}.diff-row{align-items:stretch;margin-bottom:2px;display:flex}.diff-block{border-radius:var(--radius-md);border:1px solid transparent;margin-bottom:12px;padding:14px 18px;font-size:15px;transition:all .25s cubic-bezier(.4,0,.2,1);position:relative}.diff-block:hover{transform:scale(1.008)translate(2px)}.split-row{grid-template-columns:1fr 1fr;gap:32px;margin-bottom:8px;display:grid;position:relative}.split-row:after{content:"";position:absolute;top:0;bottom:0;left:calc(50% - 16px)}.split-col{min-height:30px;margin-bottom:16px}.split-col:last-child{margin-bottom:0}.diff-added{border-left:5px solid var(--success);border-top:1px solid rgba(16,185,129,.12);border-bottom:1px solid rgba(16,185,129,.12);border-right:1px solid rgba(16,185,129,.12);background:linear-gradient(90deg,rgba(16,185,129,.08) 0%,rgba(16,185,129,.02) 100%)!important}.diff-added:hover{box-shadow:0 6px 16px rgba(16,185,129,.12)}.diff-removed{border-left:5px solid var(--danger);border-top:1px solid rgba(239,68,68,.12);border-bottom:1px solid rgba(239,68,68,.12);border-right:1px solid rgba(239,68,68,.12);background:linear-gradient(90deg,rgba(239,68,68,.08) 0%,rgba(239,68,68,.02) 100%)!important}.diff-removed:hover{box-shadow:0 6px 16px rgba(239,68,68,.12)}.diff-modified{border-left:5px solid var(--warning);border-top:1px solid rgba(245,158,11,.12);border-bottom:1px solid rgba(245,158,11,.12);border-right:1px solid rgba(245,158,11,.12);background:linear-gradient(90deg,rgba(245,158,11,.08) 0%,rgba(245,158,11,.02) 100%)!important}.diff-modified:hover{box-shadow:0 6px 16px rgba(245,158,11,.12)}[data-theme=dark] .diff-added{border-top:1px solid rgba(52,211,153,.2);border-bottom:1px solid 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var(--border-color);border-radius:var(--radius-sm);height:100%;min-height:50px}ins.word-added{color:#047857;border-bottom:1px solid rgba(16,185,129,.3);border-radius:4px;padding:2px 4px;font-weight:600;text-decoration:none;background-color:rgba(16,185,129,.18)!important}del.word-removed{color:#b91c1c;border-bottom:1px solid rgba(239,68,68,.3);border-radius:4px;padding:2px 4px;font-weight:600;text-decoration:line-through;background-color:rgba(239,68,68,.15)!important}[data-theme=dark] ins.word-added{color:#34d399;border-bottom:1px solid rgba(52,211,153,.4);background-color:rgba(52,211,153,.25)!important}[data-theme=dark] del.word-removed{color:#f87171;border-bottom:1px solid rgba(248,113,113,.4);background-color:rgba(248,113,113,.25)!important}.empty-state{text-align:center;color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;padding:80px 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linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.diff-block p{margin-bottom:0}.diff-block h1,.diff-block h2,.diff-block h3,.diff-block h4{margin-bottom:4px;font-weight:700}.diff-block h1{font-size:22px}.diff-block h2{font-size:18px}.diff-block h3{font-size:16px}.compare-table{border-collapse:collapse;width:100%;margin-top:8px;font-size:14px}.compare-table th,.compare-table td{border:1px solid var(--border-color);text-align:left;padding:8px 12px}.compare-table th{background-color:var(--bg-input);font-weight:600}.table-row-added{background-color:var(--success-bg)}.table-row-removed{background-color:var(--danger-bg)}.table-row-modified{background-color:var(--warning-bg)}.table-cell-placeholder{background:var(--placeholder-bg);min-height:20px}.diff-image-wrapper{border-radius:var(--radius-sm);border:1px solid var(--border-color);max-width:100%;margin:8px 0;display:inline-block;position:relative;overflow:hidden}.diff-image-wrapper img{object-fit:contain;max-width:100%;max-height:240px;display:block}.diff-image-badge{color:#fff;z-index:5;border-radius:4px;padding:2px 6px;font-size:10px;font-weight:700;position:absolute;top:8px;left:8px}.diff-image-badge.old{background-color:var(--danger)}.diff-image-badge.new{background-color:var(--success)}.instructions-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-top:32px;padding:32px}.instructions-card h2{color:var(--text-main);border-bottom:2px solid var(--border-color);align-items:center;gap:10px;margin-bottom:20px;padding-bottom:10px;font-size:20px;font-weight:700;display:flex}.instructions-card h3{color:var(--primary);margin-top:24px;margin-bottom:12px;font-size:16px;font-weight:700}.instructions-card ol{margin-bottom:16px;padding-left:20px}.instructions-card li{color:var(--text-main);margin-bottom:10px;font-size:14px}.instructions-card 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16px;margin-top:16px;padding-top:16px;font-size:13px;display:flex}.footer-lang-bar a{color:var(--text-muted);transition:var(--transition);text-decoration:none}.footer-lang-bar a:hover{color:var(--primary);text-decoration:underline}.footer-lang-bar a.active{color:var(--text-main);pointer-events:none;font-weight:700}.switch-container{cursor:pointer;color:var(--text-muted);-ms-user-select:none;user-select:none;transition:var(--transition);align-items:center;gap:8px;font-size:13px;font-weight:600;display:inline-flex}.switch-container input[type=checkbox]{display:none}.switch-slider{background-color:var(--border-color);width:36px;height:20px;transition:var(--transition);border-radius:20px;display:inline-block;position:relative}.switch-dot{background-color:var(--bg-card);width:14px;height:14px;transition:var(--transition);box-shadow:var(--shadow-sm);border-radius:50%;position:absolute;bottom:3px;left:3px}.switch-container input[type=checkbox]:checked+.switch-slider{background-color:var(--primary)}.switch-container input[type=checkbox]:checked+.switch-slider .switch-dot{background-color:#fff;transform:translate(16px)}.switch-container.disabled{opacity:.4;pointer-events:none}