:root{--bg: #0f1115;--bg-panel: #181b22;--bg-panel-2: #222731;--border: #282c36;--fg: #e6e8ee;--fg-muted: #8c93a3;--accent: #ffcc00;--sidebar-width: 300px;--topbar-height: 48px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--fg);background:var(--bg)}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;overflow:hidden;-webkit-text-size-adjust:100%}.app-shell{display:grid;grid-template-columns:1fr 0;grid-template-rows:var(--topbar-height) 1fr;grid-template-areas:"top top" "canvas sidebar";height:100dvh;transition:grid-template-columns .18s ease;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}.app-shell input,.app-shell textarea,.app-shell [contenteditable=true]{user-select:text;-webkit-user-select:text}.app-shell--sidebar-open{grid-template-columns:1fr var(--sidebar-width)}.top-bar{grid-area:top;display:flex;align-items:center;justify-content:space-between;padding:0 12px 0 16px;background:var(--bg-panel);border-bottom:1px solid 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