body{margin:0;font-family:Arial,sans-serif}canvas{border:1px solid #ddd;box-shadow:0 2px 4px #0000001a}.pdf-viewer-container{position:relative;width:100%;height:100vh;overflow-y:auto}.loading-indicator{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center}.pdf-content{position:relative;padding-bottom:50px}.pdf-pages canvas{display:block;margin:10px auto;max-width:100%}.scale-controls{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:5px;background:#000000b3;padding:10px;border-radius:10px}.scale-controls button{background:#fff;border:none;padding:5px 10px;font-size:18px;cursor:pointer;border-radius:5px;box-shadow:0 2px 4px #0003}.scale-controls button:hover{background:#e0e0e0}@media (max-width: 768px){.scale-controls{display:none}}.scroll-to-top{position:fixed;bottom:20px;left:20px;background:#000000b3;color:#fff;border:none;padding:10px;font-size:18px;cursor:pointer;border-radius:50%;box-shadow:0 2px 4px #0003}.scroll-to-top:hover{background:#333}.error-container{text-align:center;padding:20px}.error-container h2{color:#d32f2f}.error-container p{color:#555}