*{box-sizing:border-box;margin:0;padding:0}html,body,#root{background-color:#111827;width:100%;height:100%;overflow:hidden}:root{--bg-canvas:#f0f0f0;--bg-panel:#fff;--text-main:#333;--text-light:#666;--border-color:#e0e0e0;--accent:#555;--accent-hover:#e2e6ea;--danger:#dc3545;--active-blue:#3b82f6}*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,sans-serif}#app-container{flex-direction:row;width:100vw;height:100vh;display:flex;overflow:hidden}header,.secondary-toolbar{box-sizing:border-box!important;flex-shrink:0!important;width:100%!important;max-width:100%!important}.material-symbols-outlined{font-variation-settings:"FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;vertical-align:middle;-webkit-user-select:none;user-select:none;font-family:Material Symbols Outlined}.icon-btn{cursor:pointer;width:34px;height:34px;color:var(--text-main);background:0 0;border:1px solid #0000;border-radius:4px;justify-content:center;align-items:center;transition:all .15s 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