.ppc-convo{max-width:780px;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
.pc-toolbar{display:flex;gap:8px;justify-content:flex-end;margin-bottom:8px}
.pc-btn{padding:8px 12px;border:0;border-radius:8px;background:#111827;color:#fff;cursor:pointer}
.pc-btn.ghost{background:#f3f4f6;color:#111827;border:1px solid #e5e7eb}
.pc-window{border:1px solid #e5e7eb;border-radius:12px;min-height:260px;max-height:520px;overflow:auto;padding:12px;background:#fff;margin-bottom:10px}
.pc-form{display:flex;gap:8px}
.pc-input{flex:1;padding:10px;border:1px solid #d0d7de;border-radius:8px}
.pc-send{padding:10px 14px;border:0;border-radius:8px;background:#111827;color:#fff;cursor:pointer}
.pc-msg{padding:10px 12px;border-radius:12px;margin:8px 0;max-width:80%;word-wrap:break-word}
.pc-msg.bot{background:#f3f4f6}
.pc-msg.user{background:#111827;color:#fff;margin-left:auto}
.pc-choices{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 4px}
.pc-chip{padding:8px 12px;border-radius:999px;border:1px solid #d0d7de;background:#f9fafb;cursor:pointer}
.pc-chip:hover{background:#eef2ff;border-color:#c7d2fe}
.pc-results{margin-top:12px;padding:12px;border:1px solid #e5e7eb;border-radius:12px}
.pc-score-wrap{display:flex;gap:16px;align-items:baseline}
.pc-score{font-size:40px;font-weight:800}
.pc-bmk{color:#374151}
.pc-bmk-label{font-weight:600;margin-right:6px}
.pc-of{color:#6b7280;margin-left:6px}
.pc-charts{margin:12px 0}
.pc-bmk-table{width:100%;border-collapse:collapse;margin-top:8px}
.pc-bmk-table th,.pc-bmk-table td{border:1px solid #e5e7eb;padding:8px;text-align:left}
.pc-error{background:#fee2e2;border:1px solid #fecaca;color:#7f1d1d;padding:8px;border-radius:8px;margin-bottom:8px}
.pc-eff{margin:8px 0;color:#111827}
.pc-eff-grade{font-weight:700}