:root{--font-sans:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--color-text-primary:#1a1a1a;--color-text-secondary:#555;--color-text-tertiary:#888;--color-text-info:#1a6dca;--color-text-warning:#b45309;--color-text-success:#15803d;--color-background-primary:#fff;--color-background-secondary:#f7f7f8;--color-background-info:#eff6ff;--color-border-secondary:#d1d5db;--color-border-tertiary:#e5e7eb;--color-border-info:#93c5fd;--color-border-warning:#fbbf24;--border-radius-md:8px;--border-radius-lg:12px}@media (prefers-color-scheme:dark){:root{--color-text-primary:#e5e5e5;--color-text-secondary:#a3a3a3;--color-text-tertiary:#737373;--color-text-info:#60a5fa;--color-text-warning:#fbbf24;--color-text-success:#4ade80;--color-background-primary:#1a1a1a;--color-background-secondary:#262626;--color-background-info:#1e293b;--color-border-secondary:#404040;--color-border-tertiary:#333;--color-border-info:#3b82f6;--color-border-warning:#d97706;--border-radius-md:8px;--border-radius-lg:12px}}*{box-sizing:border-box}body{font-family:var(--font-sans);background:var(--color-background-secondary);color:var(--color-text-primary);-webkit-font-smoothing:antialiased;margin:0}#root{min-height:100dvh}.app-outer{background:var(--color-background-secondary);justify-content:center;align-items:center;min-height:100dvh;padding:20px;display:flex}.app-card{background:var(--color-background-primary);border-radius:12px;width:100%;max-width:640px;overflow:hidden;box-shadow:0 1px 4px #0000001a}@media (width<=520px){.app-outer{align-items:flex-start;padding:0}.app-card{min-height:100dvh;box-shadow:none;border-radius:0;flex-direction:column;display:flex}}.bb-input-row{align-items:flex-end;gap:8px;display:flex}@media (width<=520px){.bb-input-row{flex-direction:column;gap:6px}.bb-submit-btn{width:100%!important;height:44px!important;font-size:14px!important}.bb-textarea{width:100%!important;font-size:16px!important}}