.flat-root{--f-bg:#fff;--f-fg:#111827;--f-fg-soft:#4b5563;--f-muted:#f3f4f6;--f-card:#fff;--f-border:#e5e7eb;font-family:var(--font-ubuntu),"Ubuntu",ui-sans-serif,system-ui,sans-serif;background:var(--f-bg);color:var(--f-fg);min-height:100vh;-webkit-font-smoothing:antialiased}.flat-root[data-flat-theme=dark]{--f-bg:#0b0f19;--f-fg:#f9fafb;--f-fg-soft:#9ca3af;--f-muted:#111827;--f-card:#111827;--f-border:#1f2937}.flat-root ::-moz-selection{background:#3b82f6;color:#fff}.flat-root ::selection{background:#3b82f6;color:#fff}.flat-root h1,.flat-root h2,.flat-root h3{letter-spacing:-.02em;font-weight:800}