.header{background:#fff;box-shadow:0 2px 4px #0000001a;left:0;padding:1rem 0;position:fixed;right:0;top:0;width:100%;z-index:1000}.header .container{align-items:center;display:flex;justify-content:space-between;margin:0 auto;max-width:1200px;min-height:60px;padding:0 1rem;width:100%}.logo{align-items:center;color:#333;font-size:1.5rem;font-weight:700;text-decoration:none}.logo-icon{margin-right:.25rem}.nav-menu{align-items:center;display:flex;gap:2rem}.nav-link{color:#666;font-weight:500;text-decoration:none;transition:color .2s}.nav-link:hover{color:#333}.nav-dropdown{cursor:pointer;position:relative}.nav-auth{align-items:center;display:flex;gap:.5rem}.btn-login{background:none;color:#666;padding:.5rem 1rem}.btn-login,.btn-signup{border:none;cursor:pointer;font-weight:500}.btn-signup{background:#ff4757;border-radius:6px;color:#fff;padding:.75rem 1.5rem;transition:background .2s}.btn-signup:hover{background:#ff3742}.btn-menu{background:none;border:none;color:#666;cursor:pointer;font-size:1.2rem}@media (max-width:1024px){.nav-menu{gap:1rem}.nav-link{font-size:.9rem}}@media (max-width:768px){.header .container{flex-wrap:wrap;padding:0 1rem}.nav-menu{display:none}.logo{font-size:1.25rem}.nav-auth{gap:.5rem}.btn-login{display:none}.btn-signup{font-size:.9rem;padding:.5rem 1rem}.btn-menu{display:block}}@media (max-width:480px){.header .container{padding:0 .5rem}.logo{font-size:1.1rem}.btn-signup{font-size:.8rem;padding:.4rem .8rem}}.tool-card{background:#fff;border:1px solid #e5e5e5;border-radius:12px;color:inherit;display:block;padding:1.5rem;text-decoration:none;transition:transform .2s,box-shadow .2s}.tool-card:hover{box-shadow:0 8px 25px #0000001a;transform:translateY(-2px)}.tool-icon{align-items:center;border-radius:10px;color:#fff;display:flex;font-size:1.5rem;height:50px;justify-content:center;margin-bottom:1rem;width:50px}.tool-title{color:#333;font-size:1.1rem;font-weight:600;line-height:1.3;margin-bottom:.75rem}.tool-description{color:#666;font-size:.9rem;line-height:1.4;margin:0}@media (max-width:768px){.tool-card{padding:1.5rem}.tool-icon{font-size:1.5rem;height:50px;margin-bottom:1rem;width:50px}.tool-title{font-size:1.1rem;margin-bottom:.75rem}.tool-description{font-size:.9rem;line-height:1.4}}@media (max-width:480px){.tool-card{padding:1rem}.tool-icon{font-size:1.25rem;height:40px;margin-bottom:.75rem;width:40px}.tool-title{font-size:1rem;margin-bottom:.5rem}.tool-description{font-size:.85rem}}.homepage{background:linear-gradient(135deg,#f5f7fa,#c3cfe2);min-height:100vh;overflow-x:hidden;padding-top:80px;width:100%}.main-content{padding-top:2rem}.hero-section{padding:2rem 0 4rem;text-align:center}.hero-title{color:#333;font-size:2.5rem;font-weight:700;line-height:1.2;margin-bottom:1.5rem;margin-left:auto;margin-right:auto;max-width:800px}.hero-subtitle{color:#666;font-size:1.1rem;line-height:1.6;margin:0 auto;max-width:900px}.tools-section{background:#fff;border-radius:20px 20px 0 0;margin-top:2rem;min-height:60vh;padding:3rem 0;width:100%}.category-tabs{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-bottom:3rem;padding:0 1rem}.category-tab{background:none;border:none;border-radius:25px;color:#666;cursor:pointer;font-size:.9rem;font-weight:500;padding:.75rem 1rem;transition:all .2s;white-space:nowrap}.category-tab.active{background:#333;color:#fff}.category-tab:hover:not(.active){background:#f5f5f5}.tools-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));margin:0 auto;max-width:1200px;padding:0 1rem}.container{padding:0 2rem}@media (max-width:1024px){.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1.1rem}.tools-grid{gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}}@media (max-width:768px){.hero-section{padding:2rem 0 3rem}.hero-title{font-size:2rem;margin-bottom:1rem}.hero-subtitle{font-size:1rem}.tools-section{border-radius:15px 15px 0 0;padding:2rem 0}.category-tabs{-ms-overflow-style:none;justify-content:flex-start;margin-bottom:2rem;overflow-x:auto;padding:0 1rem 1rem;scrollbar-width:none}.category-tabs::-webkit-scrollbar{display:none}.category-tab{font-size:.9rem;padding:.6rem 1.2rem;white-space:nowrap}.tools-grid{gap:1rem;grid-template-columns:1fr}.container,.tools-grid{padding:0 1rem}}@media (max-width:480px){.hero-section{padding:1.5rem 0 2rem}.hero-title{font-size:1.75rem;line-height:1.2}.hero-subtitle{font-size:.9rem;line-height:1.5}.tools-section{border-radius:12px 12px 0 0;padding:1.5rem 0}.category-tabs{margin-bottom:1.5rem;padding:0 .5rem 1rem}.category-tab{font-size:.85rem;padding:.5rem 1rem}.container,.tools-grid{padding:0 .5rem}}@media (max-width:896px) and (orientation:landscape){.hero-section{padding:1rem 0 2rem}.hero-title{font-size:1.5rem}.hero-subtitle{font-size:.9rem}}.file-dropzone{background-color:#f8fafc;border:2px dashed #cbd5e0;border-radius:8px;cursor:pointer;padding:3rem 2rem;text-align:center;transition:all .3s ease}.file-dropzone.active,.file-dropzone:hover{background-color:#ebf8ff;border-color:#4299e1}.dropzone-content i{color:#a0aec0;font-size:3rem;margin-bottom:1rem}.dropzone-content p{color:#4a5568;margin:.5rem 0}.file-types{color:#718096;font-size:.875rem}@media (max-width:768px){.file-dropzone{margin:0 1rem;padding:2rem 1rem}.dropzone-content i{font-size:2rem}.dropzone-content p{font-size:.9rem}.file-types{font-size:.8rem}}@media (max-width:480px){.file-dropzone{margin:0 .5rem;padding:1.5rem .5rem}.dropzone-content i{font-size:1.5rem}.dropzone-content p{font-size:.85rem;margin:.25rem 0}.file-types{font-size:.75rem}}.file-thumbnail{align-items:center;background:#fff;border:1px solid #e2e8f0;border-radius:8px;display:flex;margin-bottom:.5rem;padding:1rem;position:relative;transition:all .3s ease}.file-thumbnail.uploaded-success{background-color:#f8fff9;border:2px solid #28a745;box-shadow:0 2px 8px #28a74533}.file-thumbnail.uploading{background-color:#f8f9ff;border:2px solid #007bff}.file-thumbnail.upload-error{background-color:#fff8f8;border:2px solid #dc3545}.thumbnail-image{flex-shrink:0;height:60px;margin-right:1rem;width:60px}.thumbnail-image img{object-fit:cover}.file-icon,.thumbnail-image img{border-radius:4px;height:100%;width:100%}.file-icon{align-items:center;background:#f7fafc;display:flex;justify-content:center}.file-icon i{font-size:2rem}.file-info{flex:1 1;min-width:0}.file-name{color:#000;font-weight:500;margin:0 0 .25rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-size{color:#718096;font-size:.875rem;margin:0}.progress-bar{background:#e2e8f0;border-radius:2px;height:4px;margin-top:.5rem;overflow:hidden;width:100%}.progress-fill{background:#4299e1;height:100%;transition:width .3s ease}.file-actions{gap:.5rem}.file-actions,.remove-btn{align-items:center;display:flex}.remove-btn{background:none;border:none;border-radius:50%;color:#e53e3e;cursor:pointer;font-size:1rem;font-weight:700;height:30px;justify-content:center;padding:.5rem;transition:all .2s;width:30px}.remove-btn:hover{background-color:#fed7d7;transform:scale(1.1)}.loading-preview{align-items:center;background:#f8f9fa;display:flex;flex-direction:column;justify-content:center}.loading-text{color:#6c757d;font-size:.75rem;margin-top:.25rem}.upload-success-indicator{align-items:center;background-color:#28a745;border-radius:12px;color:#fff;display:flex;font-size:12px;gap:4px;padding:2px 8px;position:absolute;right:8px;top:8px}.success-icon{font-weight:700}@media (max-width:768px){.file-thumbnail{flex-direction:column;padding:.75rem;text-align:center}.thumbnail-image{height:50px;margin:0 auto .75rem;width:50px}.file-info{margin-bottom:.75rem}.file-name{font-size:.9rem}.file-size{font-size:.8rem}.file-actions{justify-content:center}}@media (max-width:480px){.file-thumbnail{padding:.5rem}.thumbnail-image{height:40px;margin-bottom:.5rem;width:40px}.file-name{font-size:.85rem}.file-size{font-size:.75rem}}.file-merge-page{background-color:#f7fafc;min-height:100vh;overflow-x:hidden;overflow-y:auto;padding-top:100px}.files-section{margin-bottom:2rem;max-height:70vh;overflow-y:auto;padding-right:.5rem}.files-section::-webkit-scrollbar{width:8px}.files-section::-webkit-scrollbar-track{background:#f1f1f1;border-radius:4px}.files-section::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}.files-section::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.files-grid{grid-gap:1rem;display:grid;gap:1rem;padding-bottom:1rem}.btn{border:none;border-radius:6px;cursor:pointer;font-weight:500;padding:.75rem 1.5rem;transition:all .2s}.btn:disabled{cursor:not-allowed;opacity:.5}.btn-primary{background-color:#4299e1;color:#fff}.btn-primary:hover:not(:disabled){background-color:#3182ce}.btn-success{background-color:#48bb78;color:#fff}.btn-success:hover:not(:disabled){background-color:#38a169}.action-buttons{align-items:center;display:flex;flex-wrap:wrap;gap:1rem}.text-3xl{font-size:1.875rem}.text-xl{font-size:1.25rem}.text-lg{font-size:1.125rem}.font-bold{font-weight:700}.font-semibold{font-weight:600}.font-medium{font-weight:500}.mb-8{margin-bottom:2rem}.mb-4{margin-bottom:1rem}.mb-2{margin-bottom:.5rem}.mx-auto{margin-left:auto;margin-right:auto}.space-y-1>*+*{margin-top:.25rem}.list-decimal{list-style-type:decimal}.list-inside{list-style-position:inside}.text-gray-600{color:#718096}@media (max-width:768px){.file-merge-page .container{padding:0 1rem}.text-3xl{font-size:1.5rem}.text-xl{font-size:1.1rem}.action-buttons{flex-direction:column;gap:.5rem}.btn{padding:.75rem;width:100%}.files-grid{grid-template-columns:1fr}.mb-8{margin-bottom:1.5rem}.mb-4{margin-bottom:1rem}}@media (max-width:480px){.file-merge-page .container{padding:0 .5rem}.text-3xl{font-size:1.25rem}.text-xl{font-size:1rem}.py-8{padding-bottom:1rem;padding-top:1rem}.btn{font-size:.9rem}}.coming-soon-page{background:linear-gradient(135deg,#667eea,#764ba2);display:flex;flex-direction:column;min-height:100vh}.coming-soon-content{align-items:center;display:flex;flex:1 1;justify-content:center;padding:2rem}.coming-soon-card{background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d;max-width:500px;padding:3rem;text-align:center;width:100%}.coming-soon-icon{font-size:5rem;margin-bottom:1.5rem}.coming-soon-title{color:#2d3748;font-size:2.5rem;font-weight:700;margin-bottom:1rem}.back-home-button:hover,.coming-soon-description{color:#718096;font-size:1.125rem;line-height:1.6;margin-bottom:2rem}.back-home-button{background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:8px;color:#fff;cursor:pointer;font-size:1rem;font-weight:600;padding:.875rem 2rem;transition:transform .2s,box-shadow .2s}.back-home-button:hover{box-shadow:0 10px 20px #667eea66;transform:translateY(-2px)}*{box-sizing:border-box;margin:0;padding:0}:root{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#242424;color:#ffffffde;color-scheme:light dark;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;font-synthesis:none;font-weight:400;line-height:1.5;text-rendering:optimizeLegibility}a{color:#646cff;font-weight:500;text-decoration:inherit}a:hover{color:#535bf2}html{overflow-x:hidden;overflow-y:auto;scroll-behavior:smooth}body,html{height:100%;width:100%}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f7fafc;display:flex;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0;min-height:100vh;min-width:320px;overflow-x:hidden;overflow-y:auto;place-items:center;position:relative}h1{font-size:3.2em;line-height:1.1}button{background-color:#1a1a1a;border:1px solid #0000;border-radius:8px;cursor:pointer;font-family:inherit;font-size:1em;font-weight:500;padding:.6em 1.2em;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}#root{min-height:100vh;width:100%}.container{box-sizing:border-box;margin:0 auto;max-width:1200px;padding:0 1rem;width:100%}@media (prefers-color-scheme:light){:root{background-color:#fff;color:#213547}a:hover{color:#747bff}button{background-color:#f9f9f9}}