.app{background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d;padding:40px}.header{text-align:center;margin-bottom:40px}.header h1{color:#333;font-size:32px;margin-bottom:10px}.header p{color:#666;font-size:16px}.input-section{margin-bottom:30px}.input-wrapper{display:flex;gap:10px;margin-bottom:20px}.url-input{flex:1;padding:15px;border:2px solid #e0e0e0;border-radius:10px;font-size:16px;outline:none;transition:border-color .3s}.url-input:focus{border-color:#667eea}.btn{padding:15px 30px;border:none;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s;outline:none}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 20px #667eea66}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-download{background:#4caf50;color:#fff;width:100%;margin-top:10px}.btn-download:hover:not(:disabled){background:#45a049;transform:translateY(-2px);box-shadow:0 5px 20px #4caf5066}.error{background:#fee;border:1px solid #fcc;color:#c33;padding:15px;border-radius:10px;margin-bottom:20px}.success{background:#efe;border:1px solid #cfc;color:#3c3;padding:15px;border-radius:10px;margin-bottom:20px}.loading{text-align:center;padding:20px;color:#667eea}.spinner{border:3px solid #f3f3f3;border-top:3px solid #667eea;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto 10px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.video-info{background:#f9f9f9;padding:20px;border-radius:10px;margin-bottom:20px}.video-header{display:flex;gap:20px;margin-bottom:20px}.video-thumbnail{width:200px;height:112px;object-fit:cover;border-radius:10px}.video-details{flex:1}.video-details h3{color:#333;margin-bottom:10px;font-size:18px}.video-details p{color:#666;font-size:14px}.options-section{display:grid;gap:20px}.option-group{display:flex;flex-direction:column;gap:10px}.option-group label{font-weight:600;color:#333;font-size:14px}.select{padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:14px;outline:none;background:#fff;cursor:pointer;transition:border-color .3s}.select:focus{border-color:#667eea}.format-tabs{display:flex;gap:10px;margin-bottom:20px}.format-tab{flex:1;padding:12px;border:2px solid #e0e0e0;background:#fff;border-radius:8px;cursor:pointer;font-weight:600;transition:all .3s}.format-tab.active{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-color:transparent}.format-tab:hover:not(.active){border-color:#667eea}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}#root{width:100%;max-width:800px}