:root{--chestnut:#4361ee;--chestnut-dark:#3a0ca3;--accent:#4cc9f0;--success:#06d6a0;--snow:#fff;--snow-dark:#f1f5f9;--gray-200:#e2e8f0;--gray-300:#cbd5e1;--gray-500:#64748b;--dark:#1e293b;--grad-primary:linear-gradient(135deg,#4361ee,#3a0ca3);--grad-accent:linear-gradient(135deg,#4cc9f0,#06d6a0);--shadow-sm:0 2px 8px rgba(0,0,0,0.06);--shadow-md:0 8px 25px rgba(67,97,238,0.1);--shadow-lg:0 20px 60px rgba(0,0,0,0.08);--radius-sm:12px;--radius-md:16px;--radius-lg:24px;--transition:all .25s ease}#app-content{background:linear-gradient(160deg, #f8faff 0%, #f0f4ff 40%, #f5f0ff 100%);min-height:100vh;color:var(--dark)}#app-content[data-theme=dark]{--chestnut:#818cf8;--chestnut-dark:#6366f1;--accent:#22d3ee;--success:#34d399;--snow:#1e293b;--snow-dark:#0f172a;--gray-200:#334155;--gray-300:#475569;--gray-500:#94a3b8;--dark:#f1f5f9;--shadow-sm:0 2px 8px rgba(0,0,0,0.2);--shadow-md:0 8px 25px rgba(0,0,0,0.3);--shadow-lg:0 20px 60px rgba(0,0,0,0.4);background:linear-gradient(160deg, #0f172a 0%, #1e293b 40%, #0f172a 100%)}#floatThemeToggle{position:fixed;top:80px;right:16px;z-index:999;width:44px;height:44px;border-radius:50%;border:2px solid var(--gray-200);background:var(--snow);color:var(--dark);font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition);box-shadow:var(--shadow-md)}#floatThemeToggle:hover{transform:scale(1.1);border-color:var(--chestnut)}.hero-section{background:var(--grad-primary);padding:80px 0 60px;color:#fff;position:relative;overflow:hidden}.hero-section::before{content:"";position:absolute;inset:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23fff" fill-opacity="0.06" d="M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,250.7C672,235,768,181,864,181.3C960,181,1056,235,1152,234.7C1248,235,1344,181,1392,154.7L1440,128L1440,320L0,320Z"/></svg>') no-repeat bottom/cover}.hero-title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;margin-bottom:6px}.hero-desc{font-size:1rem;opacity:.9;max-width:600px;line-height:1.7}.hero-badges{display:flex;flex-wrap:wrap;gap:.5rem;margin:.8rem 0}.hero-badge{background:hsla(0,0%,100%,.15);border-radius:50px;padding:.3rem 1rem;font-weight:500;font-size:.82rem;display:flex;align-items:center;gap:.3rem}.tool-section{margin-top:-30px;position:relative;z-index:10;padding-bottom:2rem}.tool-card{background:var(--snow);border-radius:20px;padding:2rem;box-shadow:var(--shadow-lg);border:1px solid var(--gray-200)}.step-indicator{display:flex;justify-content:space-between;margin:1.5rem 0 2rem;position:relative}.step-indicator::before{content:"";position:absolute;top:20px;left:15%;right:15%;height:3px;background:var(--gray-200);z-index:1}.step{text-align:center;z-index:2;flex:1}.step .step-number{width:40px;height:40px;border-radius:50%;background:var(--gray-200);color:var(--gray-500);display:flex;align-items:center;justify-content:center;margin:0 auto 6px;font-weight:700;font-size:1rem;border:3px solid var(--snow);transition:var(--transition)}.step.active .step-number{background:var(--chestnut);color:#fff;box-shadow:0 0 0 4px rgba(67,97,238,.2);transform:scale(1.1)}.step.done .step-number{background:var(--success);color:#fff}.step.active .step-label{color:var(--chestnut);font-weight:700}.step-label{font-weight:600;color:var(--gray-500);font-size:.8rem;transition:var(--transition)}.upload-area{position:relative;border:3px dashed var(--gray-300);border-radius:16px;padding:2.5rem 1.5rem;text-align:center;background:rgba(67,97,238,.03);transition:var(--transition);cursor:pointer}.upload-area:hover,.upload-area.dragover{border-color:var(--chestnut);background:rgba(67,97,238,.08)}.browse-btn{background:var(--grad-primary);color:var(--snow);border:none;padding:12px 32px;border-radius:50px;font-weight:700;font-size:.9rem;cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;gap:8px;box-shadow:0 8px 25px rgba(67,97,238,.3)}.browse-btn:hover{transform:translateY(-2px) scale(1.03);box-shadow:0 12px 30px rgba(67,97,238,.4)}.app-btn{background:var(--grad-accent);color:#fff;border:none;padding:12px 28px;border-radius:50px;font-weight:700;font-size:.9rem;cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;gap:8px;box-shadow:0 6px 20px rgba(4,211,160,.3)}.app-btn:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(4,211,160,.4)}.result-card{background:linear-gradient(135deg, #06d6a0, #00b4d8);color:#fff;border-radius:16px;padding:2rem;text-align:center;margin:1rem 0}.result-card h4{color:#fff;font-weight:700;margin-bottom:4px}.load-mask{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;flex-direction:column;opacity:0;pointer-events:none;transition:opacity .3s}.load-mask.active{opacity:1;pointer-events:auto}.load-spinner{width:50px;height:50px;border:5px solid hsla(0,0%,100%,.2);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin-bottom:12px}@keyframes spin{to{transform:rotate(360deg)}}.load-txt{color:#fff;font-size:1.1rem;font-weight:600}.load-sub{color:hsla(0,0%,100%,.7);font-size:.85rem;margin-top:4px}.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(20px);z-index:99999;padding:12px 28px;border-radius:12px;font-weight:600;font-size:.9rem;color:#fff;box-shadow:0 8px 30px rgba(0,0,0,.2);opacity:0;pointer-events:none;transition:all .35s ease}.toast.on{opacity:1;transform:translateX(-50%) translateY(0);pointer-events:auto}.toast.ok{background:var(--success)}.toast.err{background:#ef4444}.toast.wrn{background:#f59e0b;color:#1e293b}.toast.inf{background:var(--chestnut)}#backToTop{position:fixed;bottom:32px;right:32px;width:64px;height:64px;border-radius:50%;background:var(--grad-primary);color:#fff;border:none;font-size:1.6rem;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 30px rgba(67,97,238,.4);opacity:0;pointer-events:none;transition:all .35s ease;z-index:999}#backToTop.show{opacity:1;pointer-events:auto}#backToTop:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(67,97,238,.5)}.content-card{background:var(--snow);border-radius:20px;padding:40px;margin-bottom:32px;box-shadow:var(--shadow-lg);border:1px solid var(--gray-200)}.content-card h2{font-size:1.4rem;margin-bottom:16px}.content-card p{color:var(--gray-500);margin-bottom:14px;line-height:1.8}.content-card ul{color:var(--gray-500);margin-bottom:14px;padding-left:20px}.content-card ul li{margin-bottom:6px}.preview-container{background:var(--dark);border-radius:var(--radius-sm);padding:1rem;margin-bottom:1rem;max-height:350px;overflow-y:auto}.preview-title{color:var(--snow);font-weight:600;margin-bottom:.8rem;display:flex;align-items:center;gap:8px}.preview-canvas{display:block;margin:0 auto .5rem;border-radius:6px;box-shadow:0 4px 15px rgba(0,0,0,.3);max-width:100%}.options-section{background:var(--snow-dark);border-radius:var(--radius-sm);padding:1.2rem;margin-bottom:1rem;border:1px solid var(--gray-200)}.options-title{font-weight:700;margin-bottom:.8rem;display:flex;align-items:center;gap:8px}.option-item{display:flex;align-items:center;gap:10px;padding:.4rem 0}.option-item input[type=checkbox]{width:18px;height:18px;accent-color:var(--chestnut)}.html-output{background:#0f172a;color:#e2e8f0;padding:1.2rem;border-radius:var(--radius-sm);font-family:Monaco,Menlo,"Courier 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i{transform:rotate(180deg)}.faq-question{width:100%;padding:14px 18px;background:var(--snow);border:none;text-align:left;font-weight:600;font-size:.9rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--dark)}.faq-answer{padding:0 18px;max-height:0;overflow:hidden;transition:max-height .35s ease;font-size:.85rem;color:var(--gray-500)}.faq-answer>div{padding:0 0 14px}.faq-toggle i{transition:transform .3s}.related-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(180px, 1fr));gap:12px}.related-card{display:flex;align-items:center;gap:10px;padding:12px 14px;background:var(--snow);border:1px solid var(--gray-200);border-radius:12px;text-decoration:none;color:var(--dark);transition:var(--transition)}.related-card:hover{border-color:var(--chestnut);box-shadow:var(--shadow-sm)}.related-card strong{font-size:.82rem}.related-card span{font-size:.72rem;color:var(--gray-500)}.upload-icon{width:60px;height:60px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#fff;margin:0 auto}.upload-icon.pdf{background:linear-gradient(135deg, #dc2626, #ef4444)}.upload-icon.html{background:linear-gradient(135deg, #e34c26, #f97316)}.upload-icon.arrow{width:44px;height:44px;background:var(--grad-primary);font-size:1.2rem}.upload-icon-container{display:flex;justify-content:center;align-items:center;gap:.8rem;margin-bottom:1rem}.upload-title{font-size:1.2rem;font-weight:700;margin-bottom:4px}.upload-subtitle{color:var(--gray-500);font-size:.9rem;margin-bottom:1rem;text-align:center}.upload-badges{display:flex;justify-content:center;gap:.8rem;flex-wrap:wrap}.upload-badge{background:var(--snow);padding:6px 14px;border-radius:50px;font-size:.82rem;display:flex;align-items:center;gap:6px;box-shadow:var(--shadow-sm);border:1px solid var(--gray-200)}.upload-section{text-align:center;margin-bottom:1rem}.step-label+.upload-section h2{font-size:1.3rem;margin-bottom:8px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:50px;font-weight:700;font-size:.9rem;cursor:pointer;transition:var(--transition);border:none;text-decoration:none}.btn-primary{background:var(--grad-primary);color:#fff;box-shadow:0 4px 15px rgba(67,97,238,.4)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(67,97,238,.5)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-secondary{background:var(--snow);color:var(--dark);border:2px solid var(--gray-200)}.btn-secondary:hover{border-color:var(--chestnut);color:var(--chestnut)}.btn-success{background:var(--grad-accent);color:#fff}.btn-success:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(4,211,160,.4)}.btn-lg{padding:14px 32px;font-size:1rem}.action-section{padding:0}.progress-section{background:var(--snow-dark);border-radius:var(--radius-sm);padding:1.2rem;margin-bottom:1rem;border:1px solid var(--gray-200)}.progress-step{display:flex;align-items:center;gap:12px;padding:10px;margin:6px 0;border-radius:8px;background:var(--snow);border-left:4px solid var(--gray-300);transition:var(--transition)}.progress-step.active{background:rgba(67,97,238,.06);border-left-color:var(--chestnut)}.progress-step.completed{background:rgba(6,214,160,.08);border-left-color:var(--success)}.result-icon{width:70px;height:70px;background:hsla(0,0%,100%,.2);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1rem;font-size:2rem}.result-title{font-size:1.5rem;margin-bottom:4px}.result-subtitle{opacity:.9;margin-bottom:1.5rem}.result-stats{display:flex;justify-content:center;gap:2rem;margin-bottom:1.5rem;flex-wrap:wrap}.result-stat-value{font-size:1.8rem;font-weight:800}.result-stat-label{font-size:.82rem;opacity:.85}.result-actions{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.result-actions .btn{background:#fff;color:var(--success)}.file-details h4{margin-bottom:4px}.file-details small{color:var(--gray-500);font-size:.82rem}.text-center{text-align:center}.text-muted{color:var(--gray-500)}.mt-3{margin-top:1rem}.mt-4{margin-top:1.5rem}.mb-4{margin-bottom:1.5rem}.ms-2{margin-left:.5rem}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;line-height:1.7;color:#333;max-width:900px;margin:0 auto;padding:40px;background:#f8f9fa}.document-container{background:#fff;border-radius:12px;box-shadow:0 5px 20px rgba(0,0,0,.1);overflow:hidden}.header{background:linear-gradient(135deg, #e34c26, #f97316);color:#fff;padding:30px;text-align:center}.content-section{padding:30px}.page-section{margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid #eee}.page-section:last-child{border-bottom:none}.page-header{background:#fff7ed;padding:15px;border-radius:8px;margin-bottom:15px;border-left:4px solid #e34c26}.page-content p{margin-bottom:12px}.footer{background:#1e293b;color:#f8fafc;padding:20px;text-align:center}@media(max-width: 768px){body{padding:10px}.header,.content-section,.footer{padding:20px}}@media(max-width: 480px){.hero-section{padding:64px 16px 40px}.hero-title{font-size:1.8rem}.hero-desc{font-size:.92rem}#floatThemeToggle{top:70px;right:12px;width:38px;height:38px;font-size:1rem}.tool-card,.content-card{padding:20px}.step-indicator{flex-direction:column;gap:12px}.step-indicator::before{display:none}.upload-area{padding:2rem 1rem}.file-header{flex-direction:column;align-items:flex-start}.result-stats{gap:1rem}.preview-container,.html-output{max-height:240px}.related-grid{grid-template-columns:1fr}#backToTop{width:52px;height:52px;bottom:20px;right:20px;font-size:1.3rem}.btn{padding:11px 22px;font-size:.85rem}.btn-lg{padding:12px 24px;font-size:.95rem}.header,.content-section,.footer{padding:20px}}@media(prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}}