:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;cursor:pointer;transition:border-color .25s}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}:root{--primary-color: #6366f1;--primary-hover: #5855eb;--secondary-color: #8b5cf6;--accent-color: #ec4899;--text-color: #1f2937;--text-light: #6b7280;--text-muted: #9ca3af;--bg-light: #f9fafb;--bg-white: #ffffff;--border-color: #e5e7eb;--border-selected: #6366f1;--bg-selected: #eef2ff;--error-color: #ef4444;--error-bg: #fef2f2;--success-color: #10b981;--warning-color: #f59e0b;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);--gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);--nav-bg: rgba(255, 255, 255, .95);--hero-bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);--section-bg: #ffffff;--card-bg: linear-gradient(to bottom right, #f9fafb, #f3f4f6);--card-bg-hover: linear-gradient(to bottom right, #faf5ff, #ede9fe);--footer-bg: #1f2937;--footer-text: #ffffff;--footer-muted: #9ca3af;--footer-border: #374151;--lang-btn-border: rgba(0, 0, 0, .15);--lang-btn-color: #64748b;--lang-btn-hover-bg: rgba(124, 58, 237, .05);--lang-btn-hover-color: #7c3aed;--lang-btn-hover-border: rgba(124, 58, 237, .3);--lang-btn-active-bg: rgba(124, 58, 237, .1);--lang-btn-active-color: #7c3aed;--lang-btn-active-border: #7c3aed;--skeleton-base: #f0f0f0;--skeleton-shine: #e0e0e0;--dropzone-bg: #ffffff;--step-bg: #ffffff}[data-theme=dark]{--primary-color: #818cf8;--primary-hover: #6366f1;--secondary-color: #a78bfa;--accent-color: #f472b6;--text-color: #f3f4f6;--text-light: #d1d5db;--text-muted: #9ca3af;--bg-light: #1f2937;--bg-white: #111827;--border-color: #374151;--border-selected: #818cf8;--bg-selected: #1e1b4b;--error-color: #f87171;--error-bg: #451a1a;--success-color: #34d399;--warning-color: #fbbf24;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -2px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .4), 0 10px 10px -5px rgba(0, 0, 0, .3);--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);--gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);--nav-bg: rgba(17, 24, 39, .95);--hero-bg: linear-gradient(135deg, #111827 0%, #1f2937 100%);--section-bg: #111827;--card-bg: linear-gradient(to bottom right, #1f2937, #374151);--card-bg-hover: linear-gradient(to bottom right, #2e1065, #1e1b4b);--footer-bg: #0f172a;--footer-text: #f3f4f6;--footer-muted: #9ca3af;--footer-border: #1e293b;--lang-btn-border: rgba(255, 255, 255, .15);--lang-btn-color: #94a3b8;--lang-btn-hover-bg: rgba(129, 140, 248, .1);--lang-btn-hover-color: #a5b4fc;--lang-btn-hover-border: rgba(129, 140, 248, .3);--lang-btn-active-bg: rgba(129, 140, 248, .15);--lang-btn-active-color: #a5b4fc;--lang-btn-active-border: #818cf8;--skeleton-base: #374151;--skeleton-shine: #4b5563;--dropzone-bg: #1f2937;--step-bg: #1f2937}*{box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--text-color);line-height:1.6;margin:0;background-color:var(--bg-white)}#root{width:100%}.landing-page{opacity:0;transform:translateY(20px);transition:all .6s ease-out}.landing-page.visible{opacity:1;transform:translateY(0)}.nav-header{position:fixed;top:0;left:0;right:0;background:var(--nav-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);z-index:1000;padding:1rem 0}.nav-container{max-width:1200px;margin:0 auto;padding:0 2rem;display:flex;justify-content:space-between;align-items:center}.nav-brand{display:flex;align-items:center;gap:.75rem;font-weight:700;font-size:1.25rem;color:var(--text-color)}.nav-brand-icon{width:2rem;height:2rem;background:linear-gradient(to bottom 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var(--lang-btn-border);color:var(--lang-btn-color);cursor:pointer;border-radius:4px;font-size:.875rem;font-weight:500;transition:all .2s ease}.lang-btn:hover{background:var(--lang-btn-hover-bg);color:var(--lang-btn-hover-color);border-color:var(--lang-btn-hover-border)}.lang-btn.active{background:var(--lang-btn-active-bg);color:var(--lang-btn-active-color);border-color:var(--lang-btn-active-border);font-weight:600}.lang-btn:focus{outline:2px solid var(--lang-btn-hover-border);outline-offset:2px}.hero-section-new{padding:8rem 2rem 4rem;background:var(--hero-bg);min-height:100vh;display:flex;align-items:center}.hero-container{max-width:1200px;margin:0 auto;width:100%}.hero-content-center{text-align:center;max-width:800px;margin:0 auto}.hero-title-new{font-size:3.5rem;font-weight:800;line-height:1.1;color:var(--text-color);margin-bottom:1.5rem;animation:fadeInUp .6s ease-out .2s 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0;background:var(--section-bg)}.features-container-updated{max-width:1280px;margin:0 auto;padding:0 1rem}.features-header-updated{text-align:center;margin-bottom:4rem}.features-header-updated h2{font-size:2rem;font-weight:800;color:var(--text-color);margin-bottom:1rem}.features-header-updated p{font-size:1.25rem;color:var(--text-light);max-width:32rem;margin:0 auto}.features-grid-updated{display:grid;grid-template-columns:repeat(1,1fr);gap:2rem}@media(min-width:768px){.features-grid-updated{grid-template-columns:repeat(2,1fr)}}@media(min-width:1024px){.features-grid-updated{grid-template-columns:repeat(4,1fr)}}.feature-card-updated{text-align:center;padding:1.5rem;border-radius:1rem;background:var(--card-bg);transition:all .3s ease;transform:scale(1);box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f}.feature-card-updated:hover{background:var(--card-bg-hover);transform:scale(1.05);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d}.feature-icon-updated{width:4rem;height:4rem;background:linear-gradient(to bottom right,#7c3aed,#2563eb);border-radius:1rem;display:flex;align-items:center;justify-content:center;margin:0 auto 1rem}.feature-card-updated h3{font-size:1.25rem;font-weight:700;color:var(--text-color);margin-bottom:.5rem}.feature-card-updated p{color:var(--text-light);line-height:1.625;margin:0}.how-it-works-section-new{padding:6rem 2rem;background:var(--bg-light)}.section-container{max-width:1200px;margin:0 auto}.section-header-new{text-align:center;max-width:600px;margin:0 auto 4rem}.section-header-new h2{font-size:2.5rem;font-weight:800;color:var(--text-color);margin-bottom:1rem}.section-header-new p{font-size:1.125rem;color:var(--text-light)}.steps-container-new{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;position:relative}.step-item-new{background:var(--step-bg);border-radius:16px;padding:2rem;text-align:left;position:relative;border:1px solid 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p{color:var(--text-color);font-style:italic;margin-bottom:1.5rem;line-height:1.6}.testimonial-author-new{display:flex;align-items:center;gap:1rem}.author-avatar-new{width:48px;height:48px;background:var(--primary-color);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.125rem}.author-name-new{font-weight:600;color:var(--text-color)}.author-role-new{color:var(--text-light);font-size:.875rem}.cta-section-new{padding:6rem 2rem;background:var(--primary-color);text-align:center}.cta-container{max-width:800px;margin:0 auto}.cta-content-new h2{font-size:2.5rem;font-weight:800;color:#fff;margin-bottom:1rem}.cta-content-new p{font-size:1.125rem;color:#ffffffe6;margin-bottom:2rem}.cta-buttons-new{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.cta-primary-button{background:#fff;color:var(--primary-color);border:none;border-radius:12px;padding:1rem 2rem;font-size:1.125rem;font-weight:600;cursor:pointer;transition:all .3s ease}.cta-primary-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-xl)}.cta-secondary-button{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3);border-radius:12px;padding:1rem 2rem;font-size:1.125rem;font-weight:600;cursor:pointer;transition:all .3s ease}.cta-secondary-button:hover{background:#ffffff1a}.footer-new{background:var(--footer-bg);color:var(--footer-text);padding:3rem 2rem 1rem}.footer-container{max-width:1200px;margin:0 auto}.footer-content{display:grid;grid-template-columns:1fr;gap:3rem;margin-bottom:2rem}.footer-brand{max-width:300px}.footer-logo{display:flex;align-items:center;gap:.75rem;font-weight:700;font-size:1.25rem;margin-bottom:1rem}.footer-brand-icon{width:1.5rem;height:1.5rem;background:linear-gradient(to bottom right,#7c3aed,#2563eb);border-radius:.375rem;display:flex;align-items:center;justify-content:center}.footer-brand p{color:var(--footer-muted);line-height:1.6}.footer-bottom{border-top:1px solid var(--footer-border);padding-top:1rem;text-align:center}.footer-bottom p{color:var(--footer-muted);margin:0}.footer-github-link{display:inline-flex;align-items:center;gap:.5rem;color:var(--footer-muted);text-decoration:none;font-size:.875rem;transition:color .3s ease}.footer-github-link:hover{color:var(--footer-text)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.app-container{min-height:100vh;background:var(--bg-light);padding:2rem 0}.content-container{max-width:1200px;margin:0 auto;padding:0 1rem}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:2.5rem;font-weight:800;margin-bottom:.5rem;color:var(--text-color)}.subtitle{font-size:1.125rem;color:var(--text-light)}.file-uploader{display:flex;flex-direction:column;align-items:center;width:100%;margin-bottom:2rem}.dropzone{width:100%;height:200px;border:2px dashed var(--border-color);border-radius:16px;display:flex;align-items:center;justify-content:center;background:var(--bg-white);cursor:pointer;transition:all .3s ease;padding:1.5rem;margin-bottom:1rem}.dropzone:hover{background:var(--bg-light);border-color:var(--primary-color);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.dropzone-content{text-align:center}.dropzone-title{font-size:1.25rem;font-weight:600;margin-bottom:.5rem;color:var(--text-color)}.dropzone-subtitle{font-size:.875rem;color:var(--text-light);margin-bottom:1rem}.select-button{background:var(--gradient-primary);color:#fff;border:none;border-radius:8px;padding:.75rem 1.5rem;font-size:.875rem;font-weight:600;cursor:pointer;transition:all .3s 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1.5rem;font-size:.875rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow)}.primary-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.primary-button:disabled{opacity:.6;cursor:not-allowed;transform:none}.outline-button{background:transparent;color:var(--text-color);border:1px solid var(--border-color);border-radius:8px;padding:.75rem 1.5rem;font-size:.875rem;font-weight:600;cursor:pointer;transition:all .3s ease}.outline-button:hover{background:var(--bg-light);border-color:var(--primary-color);color:var(--primary-color)}.compression-options{background:var(--bg-light);border-radius:12px;padding:1.5rem;border:1px solid var(--border-color)}.option-label{font-weight:600;margin:0 0 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ease}.progress-status{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--text-color);font-size:.875rem;font-weight:600;z-index:10}.thumbnail-section{display:flex;flex-direction:column;gap:1rem}.thumbnail-header{display:flex;justify-content:space-between;align-items:center}.selection-info{font-weight:500;margin:0;color:var(--text-color)}.small-button{background:transparent;color:var(--text-color);border:1px solid var(--border-color);border-radius:6px;padding:.5rem .75rem;font-size:.75rem;font-weight:600;cursor:pointer;transition:all .3s ease}.small-button:hover:not(:disabled){background:var(--bg-light);border-color:var(--primary-color);color:var(--primary-color)}.small-button:disabled{opacity:.5;cursor:not-allowed}.thumbnail-controls{display:flex;align-items:center;justify-content:flex-end;margin-bottom:.75rem;padding:0 .5rem}.thumbnail-zoom-label{margin:0 8px;font-size:.875rem;color:var(--text-light)}.thumbnail-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem;width:100%}.thumbnail-item{border:2px solid var(--border-color);border-radius:12px;overflow:hidden;background:var(--bg-white);transition:all .3s ease;cursor:pointer;position:relative}.thumbnail-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.thumbnail-item.selected{border-color:var(--border-selected);background:var(--bg-selected)}.thumbnail-item.dragging{opacity:.8;transform:scale(1.05) rotate(2deg);z-index:20;box-shadow:var(--shadow-xl);border-color:var(--primary-color)}.thumbnail-item.drop-target{border-color:var(--primary-color);box-shadow:0 0 0 4px #6366f133;transform:translateY(-2px)}.thumbnail-item.drop-before:before{content:"";position:absolute;left:-8px;top:0;height:100%;width:4px;background:var(--primary-color);border-radius:2px;z-index:5}.thumbnail-item.drop-after:after{content:"";position:absolute;right:-8px;top:0;height:100%;width:4px;background:var(--primary-color);border-radius:2px;z-index:5}.thumbnail-remove-btn{position:absolute;top:8px;right:8px;z-index:20;background:#ef4444e6;color:#fff;border:none;border-radius:50%;width:28px;height:28px;font-size:18px;line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;padding:0;transition:all .3s ease;opacity:0;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.thumbnail-item:hover .thumbnail-remove-btn{opacity:1}.thumbnail-remove-btn:hover{background:#ef4444;transform:scale(1.1)}.thumbnail-image-container{width:100%;padding-top:141.4%;position:relative;background:var(--bg-light)}.thumbnail-image-container.loading{background:var(--bg-light)}.thumbnail-skeleton{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(90deg,var(--skeleton-base) 25%,var(--skeleton-shine) 50%,var(--skeleton-base) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.thumbnail-image-wrapper{position:absolute;top:0;left:0;width:100%;height:100%}.thumbnail-image{width:100%;height:100%;object-fit:contain}.thumbnail-info{padding:.75rem;border-top:1px solid var(--border-color);text-align:center}.thumbnail-info p{margin:0;font-size:.875rem;font-weight:600;color:var(--text-color)}.file-selector-container{margin-bottom:1.5rem;background:var(--bg-light);border-radius:12px;padding:1.5rem;border:1px solid var(--border-color)}.file-selector-container h3{font-size:1rem;margin:0 0 1rem;color:var(--text-color);font-weight:600}.merged-files-list{display:flex;flex-wrap:wrap;gap:.75rem;padding:1rem;background:var(--bg-white);border-radius:8px;border:1px solid var(--border-color);max-height:150px;overflow-y:auto}.merged-file-item{display:flex;align-items:center;padding:.5rem .75rem;background:var(--bg-light);border-radius:8px;border:1px solid var(--border-color);font-size:.875rem;max-width:250px;position:relative;cursor:pointer;transition:all .3s ease}.merged-file-item:hover{border-color:var(--primary-color);background:var(--bg-selected)}.merged-file-item .file-icon{margin-right:.5rem;font-size:1rem}.merged-file-item .file-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}.merged-file-item:hover:after{content:attr(data-tooltip);position:absolute;bottom:-36px;left:50%;transform:translate(-50%);background:#000000e6;color:#fff;padding:6px 12px;border-radius:6px;font-size:12px;white-space:nowrap;z-index:100;box-shadow:var(--shadow-lg)}.merge-note{font-size:.8rem;color:var(--text-light);margin:1rem 0 0;font-style:italic}.error-container{background:var(--error-bg);color:var(--error-color);border-radius:12px;border:1px solid var(--error-color);padding:1.5rem;margin-top:1rem}.error-container p{margin:.25rem 0}@media(max-width:768px){.nav-container{flex-wrap:wrap}.nav-links{display:none}.hamburger-btn{display:flex}.mobile-menu{display:flex;flex-direction:column;gap:1rem;width:100%;padding:1rem 0;border-top:1px solid var(--border-color)}.mobile-menu-link{color:var(--text-light);text-decoration:none;font-weight:500;padding:.5rem 0;transition:color .3s ease}.mobile-menu-link:hover{color:var(--primary-color)}.mobile-cta{align-self:flex-start}.hero-title-new{font-size:2.5rem}.hero-description-new{font-size:1rem}.hero-buttons{flex-direction:column;align-items:center}.features-grid-updated,.steps-container-new,.testimonials-grid-new{grid-template-columns:1fr}.cta-buttons-new{flex-direction:column;align-items:center}.footer-content{grid-template-columns:1fr;gap:2rem}.editor-header{flex-direction:column;align-items:flex-start}.button-group{width:100%;justify-content:space-between}.compression-controls{flex-direction:column;gap:.75rem}.thumbnail-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}.section-header-new h2,.cta-content-new h2{font-size:2rem}}@media(max-width:480px){.hero-title-new{font-size:2rem}.hero-description-new{font-size:.9rem}.upload-dropzone-new{padding:2rem 1rem}.nav-container{padding:0 1rem}}