:root{--bg-primary:#06080f;--bg-secondary:#0c1021;--bg-card:rgba(14, 19, 37, 0.75);--bg-card-hover:rgba(20, 27, 50, 0.85);--bg-input:rgba(10, 15, 30, 0.6);--bg-input-hover:rgba(15, 22, 42, 0.8);--bg-glass:rgba(255, 255, 255, 0.03);--border-subtle:rgba(255, 255, 255, 0.06);--border-default:rgba(255, 255, 255, 0.1);--border-hover:rgba(255, 255, 255, 0.15);--border-focus:rgba(59, 130, 246, 0.5);--text-primary:#e8ecf4;--text-secondary:#8b95a8;--text-muted:#4a5568;--text-accent:#60a5fa;--accent-blue:#3b82f6;--accent-purple:#8b5cf6;--accent-indigo:#6366f1;--accent-cyan:#22d3ee;--gradient-primary:linear-gradient(135deg, #3b82f6, #8b5cf6);--gradient-soft:linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));--gradient-glow:linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(139, 92, 246, 0.3));--success:#34d399;--error:#f87171;--warning:#fbbf24;--shadow-sm:0 1px 3px rgba(0, 0, 0, 0.3);--shadow-md:0 4px 16px rgba(0, 0, 0, 0.4);--shadow-lg:0 8px 32px rgba(0, 0, 0, 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var(--border-subtle)}.logo-text{font-size:24px;font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.5px}.logo-sub{font-size:12px;color:var(--text-muted);font-weight:400;letter-spacing:.3px}.card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:24px;margin-bottom:16px;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transition:border-color var(--transition-normal),box-shadow var(--transition-normal)}.card:hover{border-color:var(--border-default)}.card-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}.card-header 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var(--transition-normal)}.dropzone.drag-over,.dropzone:hover{border-color:var(--accent-blue);background:rgba(59,130,246,.05)}.dropzone.drag-over::before,.dropzone:hover::before{opacity:1}.dropzone.drag-over{transform:scale(1.01);box-shadow:var(--shadow-glow)}.dropzone-content{position:relative;z-index:1}.dropzone-icon{color:var(--text-muted);margin-bottom:12px;transition:color var(--transition-normal),transform var(--transition-normal)}.dropzone:hover .dropzone-icon{color:var(--accent-blue);transform:translateY(-4px)}.dropzone-text{font-size:15px;font-weight:500;color:var(--text-secondary);margin-bottom:6px}.dropzone-hint{font-size:13px;color:var(--text-muted)}.file-info{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--gradient-soft);border:1px solid 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var(--transition-normal)}.stage.active{opacity:1;background:rgba(59,130,246,.08);border-color:rgba(59,130,246,.2)}.stage.done{opacity:.7;background:rgba(52,211,153,.05);border-color:rgba(52,211,153,.1)}.stage-icon{font-size:20px;flex-shrink:0}.stage-info{flex:1}.stage-name{font-size:13px;font-weight:600;color:var(--text-primary)}.stage-detail{font-size:12px;color:var(--text-muted)}.progress-bar-container{height:6px;background:var(--border-subtle);border-radius:3px;overflow:hidden}.progress-bar{height:100%;width:0%;background:var(--gradient-primary);border-radius:3px;transition:width .5s ease;position:relative}.progress-bar::after{content:'';position:absolute;right:0;top:0;bottom:0;width:60px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3));animation:shimmer 1.5s infinite}@keyframes shimmer{0%{opacity:0}50%{opacity:1}100%{opacity:0}}.progress-percent{text-align:center;font-family:var(--font-mono);font-size:14px;color:var(--text-accent);margin-top:8px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:20px}.stat-item{padding:12px;background:var(--bg-input);border-radius:var(--radius-sm);text-align:center;border:1px solid var(--border-subtle)}.stat-value{font-family:var(--font-mono);font-size:18px;font-weight:600;color:var(--text-accent);display:block;margin-bottom:2px}.stat-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.3px}.error-section{border-color:rgba(248,113,113,.2)}.error-message{padding:14px;background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.15);border-radius:var(--radius-sm);color:var(--error);font-size:14px;margin-bottom:16px;word-break:break-word}.footer{padding:24px 0;text-align:center;margin-top:auto}.footer p{font-size:12px;color:var(--text-muted)}@media (max-width:600px){.settings-grid{grid-template-columns:1fr}.preset-options{flex-direction:column}.stats-grid{grid-template-columns:repeat(2,1fr)}.card{padding:18px}.logo-text{font-size:20px}}@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.card{animation:fadeInUp .5s ease both}.card:first-child{animation-delay:50ms}.card:nth-child(2){animation-delay:.1s}.card:nth-child(3){animation-delay:.15s}.card:nth-child(4){animation-delay:.2s}@keyframes spin{to{transform:rotate(360deg)}}.btn-convert.loading{pointer-events:none;opacity:.7}.btn-convert.loading::after{content:'';width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear 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