:root{--bg:#0b0d12;--bg-elevated:#12151c;--bg-soft:#181c26;--border:#252a36;--border-strong:#323846;--text:#eef1f7;--text-muted:#9aa3b5;--text-faint:#6b7385;--accent:#6d8cff;--accent-soft:rgba(109,140,255,.14);--accent-hover:#8aa3ff;--user-bg:#243056;--danger:#ff6b7a;--danger-soft:rgba(255,107,122,.12);--radius:14px;--radius-sm:10px;--shadow:0 12px 40px rgba(0,0,0,.35);--sidebar-w:280px;--font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%;max-height:100dvh;overflow:hidden;background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer;border:none;background:none}.app{display:grid;grid-template-columns:var(--sidebar-w) 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