:root{--bg:#f4f4f2;--panel:#fff;--ink:#1a1a1a;--muted:#6b6b6b;--line:#e2e2df;--accent:#d9480f;--accent-ink:#fff;--bot:#eef1f5;--user:#d9480f;--radius:14px}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--ink);margin:0;font:16px/1.4 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:inherit}button{font:inherit}.btn{border-radius:var(--radius);background:var(--accent);min-height:52px;color:var(--accent-ink);cursor:pointer;border:0;justify-content:center;align-items:center;gap:8px;padding:0 20px;font-size:17px;font-weight:700;display:inline-flex}.btn:disabled{opacity:.5;cursor:default}.btn.secondary{background:var(--panel);color:var(--ink);border:2px solid var(--line)}.input{border-radius:var(--radius);border:2px solid var(--line);background:var(--panel);width:100%;min-height:52px;padding:0 16px;font-size:18px}.input:focus{border-color:var(--accent);outline:none}.card{background:var(--panel);border:1px solid 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