.container{max-width:1200px;margin:0 auto;padding:2rem;min-height:100vh;display:flex;flex-direction:column}h1{font-size:2.5rem;margin-bottom:1rem;text-align:center;color:#333}p{font-size:1.1rem;margin-bottom:2rem;text-align:center;color:#666}.error-message{background-color:#ffebee;color:#c62828;padding:1rem;border-radius:8px;margin-bottom:2rem;text-align:center;border-left:4px solid #c62828}.upload-section{margin-bottom:2rem;text-align:center}.upload-label{display:block;padding:3rem;border:2px dashed #ccc;border-radius:8px;cursor:pointer;transition:all .3s ease;background-color:#f9f9f9}.upload-label:hover{border-color:#646cff;background-color:#f0f0ff}.file-input{display:none}.file-list{margin-bottom:2rem;background-color:#f9f9f9;padding:1.5rem;border-radius:8px;box-shadow:0 2px 4px #0000001a}.file-list h3{margin-bottom:1rem;color:#333}.file-list ul{list-style:none}.file-list li{display:flex;justify-content:space-between;align-items:center;padding:.75rem;border-bottom:1px solid #eee}.file-list li:last-child{border-bottom:none}.remove-btn{background-color:#f44336;color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;font-size:.875rem;transition:background-color .3s ease}.remove-btn:hover{background-color:#d32f2f}.merge-btn{background-color:#646cff;color:#fff;border:none;padding:1rem 2rem;border-radius:8px;cursor:pointer;font-size:1.1rem;font-weight:500;transition:all .3s ease;align-self:center;margin-top:auto}.merge-btn:hover:not(:disabled){background-color:#535bf2;transform:translateY(-2px);box-shadow:0 4px 8px #646cff4d}.merge-btn:disabled{background-color:#ccc;cursor:not-allowed;transform:none;box-shadow:none}@media (max-width: 480px){h1{font-size:2rem}.upload-label{padding:2rem}.merge-btn{width:100%;padding:1rem}.file-list li{flex-direction:column;align-items:flex-start;gap:.5rem}.remove-btn{align-self:flex-end}}@media (prefers-color-scheme: dark){h1,.file-list h3{color:#f1f1f1}p{color:#aaa}.upload-label{background-color:#333;border-color:#555}.upload-label:hover{background-color:#444;border-color:#646cff}.file-list{background-color:#333;box-shadow:0 2px 4px #0000004d}.file-list li{border-bottom-color:#555}.error-message{background-color:#421a1a;color:#ffcdd2;border-left-color:#f44336}}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box;margin:0;padding:0}body{min-width:320px;min-height:100vh}#root{width:100%;min-height:100vh}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}}.container{max-width:1200px;margin:0 auto;padding:2rem}@media (max-width: 768px){.container{padding:1rem}}