*{box-sizing:border-box;margin:0;padding:0}:root{--sidebar-width:70px;--sidebar-width-expanded:200px;--bg-primary:#1e1e2e;--bg-secondary:#2a2a3a;--accent:#7c3aed;--text-primary:#f1f1f1;--text-secondary:#a1a1aa}body{background:var(--bg-primary);color:var(--text-primary);height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;overflow:hidden}.app-container{height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid #ffffff1a;flex-direction:column;align-items:center;padding:1rem 0;transition:width .3s;display:flex}.sidebar:hover{width:var(--sidebar-width-expanded)}.logo{margin-bottom:2rem;font-size:1.5rem}.messenger-list{flex-direction:column;flex:1;gap:.5rem;width:100%;padding:0 .5rem;display:flex}.messenger-btn{width:100%;color:var(--text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:12px;align-items:center;gap:1rem;padding:.75rem 1rem;transition:all .2s;display:flex}.messenger-btn:hover,.messenger-btn.active{background:var(--accent);color:#fff}.messenger-btn .icon{text-align:center;min-width:24px;font-size:1.25rem}.messenger-btn .label{opacity:0;transition:opacity .2s}.sidebar:hover .messenger-btn .label{opacity:1}.sidebar-footer{padding:1rem}#settings-btn{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;font-size:1.25rem}.content-area{background:#fff;flex:1;position:relative}webview{border:none;width:100%;height:100%}.loading-overlay{background:var(--bg-primary);z-index:100;flex-direction:column;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.loading-overlay.hidden{display:none}.spinner{border:3px solid var(--bg-secondary);border-top-color:var(--accent);border-radius:50%;width:40px;height:40px;margin-bottom:1rem;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (width<=768px){.sidebar,.sidebar:hover{width:60px}.messenger-btn .label{display:none}}