:root{--bg:#e9edef;--surface:#fff;--muted:#64748b;--text:#0f172a;--line:#e2e8f0;--primary:#10b981;--primary-dark:#047857;--chat:#efeae2;--bubble:#fff;--mine:#d9fdd3;--shadow:0 16px 45px rgba(15,23,42,.08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color-scheme:light}.dark{--bg:#0b141a;--surface:#111b21;--muted:#94a3b8;--text:#f8fafc;--line:rgba(255,255,255,.1);--chat:#0b141a;--bubble:#202c33;--mine:#d9fdd3;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.boot-screen{min-height:100vh;display:grid;place-items:center;background:var(--bg);padding:24px}.boot-card{max-width:680px;width:100%;border:1px solid var(--line);border-radius:28px;background:var(--surface);box-shadow:var(--shadow);padding:28px}.boot-card h1{margin:0 0 10px;font-size:32px}.boot-card p{color:var(--muted);line-height:1.6}.boot-card.error{border-color:#fecaca;background:#fff1f2;color:#7f1d1d}.boot-card.error 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