*,*:before,*:after{box-sizing:inherit}html,body{margin:0;padding:0;width:100vw;height:100vh;overflow:hidden;box-sizing:border-box;font-family:Arial,sans-serif;font-size:16px;line-height:1.5;background-color:#fff;color:#333}#root{width:100%;height:100%;display:block;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:#0070f3;text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;font-size:1em;padding:.5em 1em;border:none;border-radius:4px;background-color:#0070f3;color:#fff;cursor:pointer;transition:background-color .2s ease}button:hover{background-color:#005bb5}.global-header{position:fixed;top:0;left:0;right:0;width:100%;height:50px;background-color:#fff;z-index:1100;display:flex;align-items:center;justify-content:center;padding:0 16px;box-sizing:border-box;box-shadow:0 2px 4px #0000001a;overflow:hidden}.global-header h1{margin:0;font-size:1.5em;color:#333}.user-menu-button{position:absolute;top:10px;right:16px;padding:8px 12px;font-size:1em;cursor:pointer}@media(max-width:600px){.global-header h1{display:none}.global-header{padding:0 8px}.user-menu-button{right:8px;top:8px}}.playlist-header-fixed{position:fixed;top:90px;left:0;right:0;width:100%;background-color:#f8f9fa;padding:12px 24px;box-sizing:border-box;z-index:1000;display:flex;flex-wrap:wrap;align-items:center;gap:16px;border-bottom:1px solid #e0e0e0}.playback-menu-container{display:flex;align-items:center;gap:24px;flex:1}.left-controls{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.right-controls{margin-left:auto;display:flex;gap:8px}.left-controls input[type=number]{padding:4px 8px;border:1px solid #ccc;border-radius:4px}@media(max-width:768px){.playlist-header-fixed{flex-direction:column;align-items:stretch;padding:16px}.header-toggle{align-self:center}.playback-menu-container{flex-direction:column;align-items:stretch}.right-controls{margin-left:0;justify-content:center}}.lyrics-view-container{display:flex;height:calc(100vh - 90px);background-color:#f5f5f5;margin-top:30px}.lyrics-sidebar{width:250px;background-color:#e8e8e8;border-right:1px solid #ccc;display:flex;flex-direction:column;overflow-y:auto}.sidebar-title{padding:16px;margin:0;font-size:.9rem;text-transform:uppercase;color:#666;border-bottom:1px solid #ccc}.sidebar-lane{margin-bottom:8px}.lane-header{padding:8px 16px;font-weight:700;font-size:.85rem;background-color:#dfdfdf;color:#333}.sidebar-block{padding:10px 16px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #eee;background-color:#f8f8f8;transition:background-color .2s}.sidebar-block:hover{background-color:#fff}.sidebar-block.active{background-color:#fff;border-left:4px solid #333}.block-title{font-weight:500;font-size:.95rem}.block-bar{font-size:.75rem;color:#888}.lyrics-main{flex:1;display:flex;flex-direction:column;background-color:#fff}.editor-container{display:flex;flex-direction:column;height:100%}.editor-header{padding:16px 24px;border-bottom:1px solid #eee;display:flex;justify-content:space-between;align-items:center}.editor-title-input{font-size:1.5rem;font-weight:700;border:none;outline:none;background:transparent}.editor-title-input:focus{border-bottom:2px solid #ccc}.editor-controls label{font-size:.85rem;color:#666;display:flex;align-items:center;gap:8px}.editor-controls input{width:50px;padding:4px;border:1px solid #ccc;border-radius:4px}.editor-textarea{flex:1;border:none;padding:24px;font-size:1.1rem;line-height:1.6;resize:none;outline:none;font-family:inherit}.editor-empty,.sidebar-empty{padding:24px;color:#888;text-align:center;font-style:italic}.sidebar-block.playing{background-color:#e8f4ff;border-right:4px solid #007bff}.sidebar-block.active.playing{background-color:#e8f4ff;border-left:4px solid #333;border-right:4px solid #007bff}@media(max-width:768px){.lyrics-view-container{flex-direction:column}.lyrics-sidebar{width:100%;max-height:200px;border-right:none;border-bottom:1px solid #ccc}}.focus-view-container{display:flex;flex-direction:column;height:calc(100vh - 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