*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f0f0f;--bg-secondary:#1a1a1a;--bg-tertiary:#252525;--text:#e8e8e8;--text-muted:#888;--accent:#4a9eff;--accent-hover:#3a8eef;--user-bubble:#2a5a9e;--assistant-bubble:#1e1e1e;--border:#333;--danger:#e55;--radius:12px;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}html,body,#root{background:var(--bg);height:100%;color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;font-size:16px;line-height:1.5;overflow:hidden}.loading-screen{justify-content:center;align-items:center;height:100dvh;display:flex}.loading-spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:32px;height:32px;animation:.8s linear infinite spin}@keyframes 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