#app-content[data-theme=dark]{--bg-body: #0f172a;--bg-card: #1e293b;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--border: #334155;--shadow: 0 4px 24px rgba(0,0,0,0.3);--primary-light: rgba(67,97,238,0.12);--dark: #f1f5f9;--gray: #94a3b8;--gray-1: #cbd5e1;--gray-2: #94a3b8;--gray-3: #64748b;--gray-4: #475569;--gray-5: #334155;--gray-6: #1e293b;--light: #1e293b;--white: #1e293b;--dark-2: #e2e8f0;--success-light: rgba(5,150,105,0.15);--bg-gradient: linear-gradient(160deg,#0f172a 0%,#1e293b 100%)}#app-content[data-theme=light]{--bg-body: #f8fafc;--bg-card: #ffffff;--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #94a3b8;--border: #e2e8f0;--shadow: 0 4px 24px rgba(67,97,238,0.08);--primary-light: rgba(67,97,238,0.08);--dark: #1a1a2e;--gray: #6c757d;--gray-1: #334155;--gray-2: #64748b;--gray-3: #94a3b8;--gray-4: #cbd5e1;--gray-5: #e2e8f0;--gray-6: #f1f5f9;--light: #f8f9fa;--white: #ffffff;--dark-2: #1e293b;--success-light: #ecfdf5;--bg-gradient: linear-gradient(160deg,#f0f4ff 0%,#e8eeff 40%,#f5f0ff 100%)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:"Inter",system-ui,-apple-system,sans-serif;background:var(--gray-6);color:var(--dark);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-family:"Poppins","Inter",sans-serif;font-weight:700;line-height:1.3;color:var(--dark)}img{max-width:100%;height:auto}a{color:#4361ee;text-decoration:none;transition:color .2s}a:hover{color:#3730a3}.d-none{display:none !important}.flex-grow-1{flex-grow:1}.text-center{text-align:center}.mb-0{margin-bottom:0}.me-1{margin-right:.25rem}.me-2{margin-right:.5rem}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.hero-section{padding:120px 0 80px;background:linear-gradient(135deg, #4361ee 0%, #3a0ca3 50%, #7209b7 100%);color:#fff;position:relative;overflow:hidden}.hero-section::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:60px;background:var(--bg-gradient);clip-path:ellipse(55% 100% at 50% 100%)}.hero-title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;margin-bottom:12px}.hero-desc{font-size:1.05rem;opacity:.9;max-width:560px}.tool-wrapper{margin-top:-30px;position:relative;z-index:10;padding-bottom:2rem}.tool-card{background:var(--bg-card);border-radius:20px;padding:2rem;box-shadow:0 4px 24px rgba(67,97,238,.08);border:1px solid rgba(67,97,238,.08)}@media(max-width: 768px){.tool-card{padding:1.2rem}}.upload-zone{border:2px dashed rgba(67,97,238,.3);border-radius:16px;padding:2.5rem 1.5rem;text-align:center;background:rgba(67,97,238,.03);cursor:pointer;transition:all .3s;position:relative}.upload-zone:hover,.upload-zone.dragover{border-color:#4361ee;background:rgba(67,97,238,.07)}.upload-icon-circle{width:72px;height:72px;background:linear-gradient(135deg, #4361ee, #7209b7);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1.25rem;font-size:1.75rem;color:#fff;box-shadow:0 8px 24px rgba(67,97,238,.3)}.upload-zone h3{font-size:1.25rem;margin-bottom:.5rem;color:var(--dark)}.upload-zone p{color:var(--gray-2);font-size:.9rem}.browse-btn{display:inline-flex;align-items:center;gap:8px;margin-top:1.25rem;padding:12px 28px;background:#4361ee;color:#fff;border:none;border-radius:10px;font-weight:600;font-size:.95rem;cursor:pointer;transition:all .3s}.browse-btn:hover{background:#3730a3;transform:translateY(-1px);box-shadow:0 4px 12px rgba(67,97,238,.3)}.file-info-bar{display:flex;align-items:center;gap:12px;padding:1rem 1.25rem;background:var(--success-light);border:1px solid #a7f3d0;border-radius:10px;margin-top:1.25rem}.file-info-bar i{color:#059669;font-size:1.25rem}.file-info-bar .file-name{font-weight:600;font-size:.95rem;color:var(--text-primary)}.file-info-bar .file-meta{color:var(--gray-2);font-size:.85rem}#pdf-canvas{display:block;max-width:100%;height:auto;margin:1.5rem auto;border-radius:10px;border:1px solid var(--border);box-shadow:var(--shadow)}.controls-bar{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;padding:1rem;background:var(--gray-6);border-radius:10px;margin:1rem 0}.ctrl-btn{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:1px solid var(--gray-4);background:var(--bg-card);border-radius:8px;cursor:pointer;font-size:1rem;color:var(--gray-1);transition:all .2s}.ctrl-btn:hover{background:#4361ee;color:#fff;border-color:#4361ee}.page-input-field{width:60px;height:44px;text-align:center;border:1px solid var(--gray-4);border-radius:8px;font-weight:700;font-size:1rem;background:var(--bg-card);color:var(--dark)}.page-input-field:focus{outline:none;border-color:#4361ee;box-shadow:0 0 0 3px rgba(67,97,238,.15)}.action-buttons{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:1.5rem 0}.act-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border:none;border-radius:10px;font-weight:600;font-size:.95rem;cursor:pointer;transition:all .3s}.act-btn-primary{background:#4361ee;color:#fff;box-shadow:0 4px 12px rgba(67,97,238,.3)}.act-btn-primary:hover{background:#3730a3;transform:translateY(-2px);box-shadow:0 8px 20px rgba(67,97,238,.4)}.act-btn-success{background:#059669;color:#fff;box-shadow:0 4px 12px rgba(5,150,105,.3)}.act-btn-success:hover{background:#047857;transform:translateY(-2px)}.act-btn-ghost{background:var(--gray-6);color:var(--gray-1);border:1px solid var(--gray-4)}.act-btn-ghost:hover{background:var(--gray-5);transform:translateY(-2px)}.progress-wrap{display:none;margin:1.25rem 0}.progress-wrap.active{display:block}.progress-track{width:100%;height:8px;background:var(--gray-5);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg, #4361ee, #7209b7);border-radius:4px;width:0%;transition:width .4s ease}.progress-label{display:flex;justify-content:space-between;font-size:.85rem;color:var(--gray-2);margin-bottom:6px}.thumbs-row{display:flex;gap:10px;padding:1rem;overflow-x:auto;background:var(--gray-6);border-radius:10px;margin-top:1.25rem}.thumbs-row::-webkit-scrollbar{height:6px}.thumbs-row::-webkit-scrollbar-track{background:rgba(0,0,0,0)}.thumbs-row::-webkit-scrollbar-thumb{background:var(--gray-4);border-radius:3px}.thumb-item{flex-shrink:0;width:70px;border-radius:8px;border:2px solid rgba(0,0,0,0);cursor:pointer;position:relative;transition:all .2s;box-shadow:0 1px 3px rgba(0,0,0,.1)}.thumb-item:hover{border-color:#4361ee;transform:translateY(-2px)}.thumb-item.active{border-color:#059669;box-shadow:0 0 0 2px rgba(5,150,105,.3)}.thumb-item.selected{border-color:#4361ee;box-shadow:0 0 0 2px rgba(67,97,238,.3)}.thumb-badge{display:none;position:absolute;top:-6px;right:-6px;width:20px;height:20px;background:#4361ee;border-radius:50%;color:#fff;font-size:11px;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(67,97,238,.4)}.thumb-item.selected .thumb-badge{display:flex}.selection-bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:1rem;padding:.75rem 1rem;background:var(--gray-6);border-radius:10px}.sel-label{font-size:.85rem;font-weight:600;color:var(--gray-2);margin-right:4px}.sel-btn{display:inline-flex;align-items:center;gap:4px;padding:6px 14px;font-size:.82rem;font-weight:600;border:1px solid var(--gray-4);border-radius:8px;background:var(--bg-card);color:var(--gray-1);cursor:pointer;transition:all .2s}.sel-btn:hover{border-color:#4361ee;color:#4361ee;background:var(--primary-light)}.sel-btn:active{transform:scale(0.96)}.sel-count{margin-left:auto;font-size:.82rem;color:var(--gray-2);font-weight:600}#customRangeInput{padding:6px 12px;font-size:.82rem;border:1px solid var(--gray-4);border-radius:8px;outline:none;width:160px;background:var(--bg-card);color:var(--text-primary);transition:border-color .2s}#customRangeInput:focus{border-color:#4361ee}#customApplyBtn{padding:6px 14px;font-size:.82rem;font-weight:600;border:none;border-radius:8px;background:#4361ee;color:#fff;cursor:pointer;transition:all .2s}#customApplyBtn:hover{background:#3730a3}.result-banner{display:none;background:linear-gradient(135deg, #059669, #047857);color:#fff;border-radius:14px;padding:2.5rem;text-align:center;margin-top:1.5rem;animation:slideUp .4s ease}.result-banner.active{display:block}.result-banner h3{color:#fff;margin-bottom:.5rem}.result-stats{display:grid;grid-template-columns:repeat(3, 1fr);gap:1rem;margin:1.5rem 0}.result-stat{background:hsla(0,0%,100%,.15);border-radius:10px;padding:1rem;backdrop-filter:blur(8px)}.result-stat .val{font-size:1.75rem;font-weight:800}.result-stat .lbl{font-size:.85rem;opacity:.9}.btn-result-download{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;background:#fff;color:#047857;border:none;border-radius:10px;font-weight:700;font-size:1.05rem;cursor:pointer;transition:all .3s}.btn-result-download:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,0,0,.2)}.loading-screen{position:fixed;inset:0;background:rgba(0,0,0,.55);backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;z-index:9999}.loading-screen.active{display:flex}.spinner-ring{width:56px;height:56px;border:4px solid hsla(0,0%,100%,.2);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}.toast-msg{position:fixed;top:90px;right:20px;z-index:9999;min-width:280px;max-width:400px;padding:1rem 1.25rem;border-radius:10px;color:#fff;font-weight:500;font-size:.9rem;box-shadow:0 10px 30px rgba(0,0,0,.2);animation:slideInRight .3s ease;display:flex;align-items:center;gap:10px}.toast-msg.t-success{background:#059669}.toast-msg.t-danger{background:#e11d48}.toast-msg.t-warning{background:#d97706}.toast-msg.t-info{background:#4361ee}#floatThemeToggle{position:fixed;top:100px;right:20px;width:48px;height:48px;background:var(--bg-card);border:1px solid var(--border);border-radius:50%;cursor:pointer;z-index:1000;display:flex;align-items:center;justify-content:center;color:var(--text-primary);font-size:1.2rem;box-shadow:var(--shadow);transition:all .3s}#floatThemeToggle:hover{background:#4361ee;color:#fff;border-color:#4361ee}#backToTop{position:fixed;bottom:30px;right:20px;width:48px;height:48px;background:#4361ee;border:none;border-radius:50%;cursor:pointer;z-index:1000;display:none;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;box-shadow:0 10px 20px rgba(0,0,0,.2);transition:all .3s}#backToTop:hover{background:#3730a3;transform:translateY(-3px)}#backToTop.show{display:flex}.content-section{padding:40px 0}.content-card{background:var(--bg-card);border-radius:20px;padding:40px;margin-bottom:32px;box-shadow:0 4px 24px rgba(67,97,238,.08);border:1px solid rgba(67,97,238,.08)}.content-card h2{font-size:1.4rem;margin-bottom:16px}.content-card p{color:var(--text-secondary);margin-bottom:14px;line-height:1.8}.content-card ul{color:var(--text-secondary);margin-bottom:14px;padding-left:20px}.content-card ul li{margin-bottom:6px}.trust-bar{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;padding:16px 24px;background:var(--bg-card);border-radius:14px;margin-bottom:32px;border:1px solid var(--border)}.trust-item{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--text-secondary)}.trust-item i{color:#4361ee;font-size:1rem}.step{display:flex;gap:16px;margin-bottom:24px;align-items:flex-start}.step-num{width:40px;height:40px;background:linear-gradient(135deg, #4361ee, #7209b7);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:1.1rem;flex-shrink:0}.step-content h3{font-size:1.1rem;margin-bottom:6px}.step-content p{color:var(--text-secondary);font-size:.95rem;line-height:1.7}.tips-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:20px;margin-top:20px}.tip-item{background:var(--gray-6);border-radius:14px;padding:24px;border:1px solid var(--border);transition:all .3s}.tip-item:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.06)}.tip-icon{width:44px;height:44px;background:linear-gradient(135deg, #4361ee, #7209b7);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;margin-bottom:14px}.tip-item h4{font-size:1rem;margin-bottom:8px}.tip-item p{font-size:.88rem;color:var(--text-secondary);line-height:1.65;margin-bottom:0}.case-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:20px;margin-top:20px}.case-card{background:var(--gray-6);border-radius:14px;padding:24px;border:1px solid var(--border);transition:all .3s}.case-card:hover{transform:translateY(-3px)}.case-number{width:36px;height:36px;background:linear-gradient(135deg, #4361ee, #7209b7);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:1rem;margin-bottom:12px}.case-card h3{font-size:1rem;margin-bottom:10px}.case-detail{font-size:.88rem;color:var(--text-secondary);margin-bottom:8px;line-height:1.65}.case-detail strong{color:var(--text-primary)}.faq-section{padding:0}.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;margin-bottom:10px;overflow:hidden}.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;background:rgba(0,0,0,0);border:none;font-weight:600;font-size:.95rem;color:var(--text-primary);cursor:pointer;text-align:left;font-family:inherit;transition:background .2s}.faq-question:hover{background:var(--gray-6)}.faq-toggle{color:var(--text-muted);transition:transform .3s}.faq-item.open .faq-toggle i{transform:rotate(180deg)}.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease}.faq-answer div{padding:0 1.25rem 1rem;color:var(--text-secondary);font-size:.92rem;line-height:1.7}.faq-item.open .faq-answer{max-height:500px}.related-tools{padding:0}.related-grid{display:grid;grid-template-columns:repeat(5, 1fr);gap:1rem;margin-top:1.5rem}.related-card{display:flex;flex-direction:column;align-items:center;text-align:center;padding:1.25rem .75rem;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;transition:all .3s;text-decoration:none;color:var(--text-primary)}.related-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,.08);border-color:#4361ee}.related-icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--primary-light);border-radius:8px;color:#4361ee;font-size:1.1rem;margin-bottom:.6rem}.related-name{font-weight:700;font-size:.85rem;color:var(--text-primary);margin-bottom:.25rem}.related-desc{font-size:.75rem;color:var(--text-muted);line-height:1.4}@keyframes spin{to{transform:rotate(360deg)}}@keyframes slideUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}@media(max-width: 991px){.related-grid{grid-template-columns:repeat(3, 1fr)}.result-stats{grid-template-columns:1fr}}@media(max-width: 767px){.hero-section{padding:100px 0 60px}.hero-title{font-size:2rem}.hero-desc{font-size:1rem}.content-card{padding:24px}.case-grid,.tips-grid{grid-template-columns:1fr}.upload-zone{padding:2rem 1rem}.action-buttons{flex-direction:column}.act-btn{justify-content:center;width:100%}}@media(max-width: 575px){.related-grid{grid-template-columns:repeat(2, 1fr)}.tool-card{padding:1rem}}