.main-panel{min-width:0;flex:1;height:100%;display:flex;flex-direction:column;background:var(--panel)}
  .topbar{height:58px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex:0 0 58px}
  .topbar-left,.topbar-right{width:100px;display:flex;align-items:center;padding:0 10px}.topbar-right{justify-content:flex-end}
  .topbar-icon{width:36px;height:36px;border-radius:8px;position:relative}
  .topbar-left .topbar-icon:after{content:"☰";font-size:18px;color:#cfcfcf}.topbar-right .topbar-icon:after{content:"•••";font-size:16px;letter-spacing:2px;color:#cfcfcf}
  .topbar-title{font-size:14px;font-weight:600;color:#d8d8d8}