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.pf-dot{background:var(--indigo)}.pf-thread{background:var(--chatgpt-bg);border:1px solid var(--chatgpt-line);border-radius:18px;padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}.pf-tutor .pf-thread{background:var(--card);border:1px solid var(--card-line);border-top:3px solid var(--indigo)}.pf-bubble{max-width:88%;padding:12px 15px;border-radius:14px;font-size:14.5px;line-height:1.55}.pf-bubble.pf-user{align-self:flex-end;background:var(--blue);color:#fff;border-bottom-right-radius:4px}.pf-bubble.pf-bot{align-self:flex-start;background:var(--card);border:1px solid var(--card-line);color:var(--ink);border-bottom-left-radius:4px}.pf-chatgpt .pf-bubble.pf-bot{border-color:var(--chatgpt-line)}.pf-step{display:block}.pf-step+.pf-step{margin-top:6px}.pf-final{display:inline-block;margin-top:8px;font-weight:700;padding:3px 9px;background:var(--indigo-ink);color:var(--indigo);border-radius:8px}.pf-exchange{display:flex;flex-direction:column;gap:8px}.pf-exchange-row{display:flex;align-items:flex-start;gap:8px}.pf-exchange-row.pf-reverse{flex-direction:row-reverse}.pf-num{flex:none;width:20px;height:20px;border-radius:50%;background:var(--indigo-ink);color:var(--indigo);font-family:IBM Plex Mono,monospace;font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:2px}.pf-tag{align-self:flex-start;margin-left:28px;font-family:IBM Plex Mono,monospace;font-size:11px;font-weight:600;letter-spacing:.03em;color:var(--teal);background:var(--teal-bg);padding:3px 8px;border-radius:6px;display:inline-block}.pf-tag.pf-mist{color:var(--mist);background:var(--chatgpt-line);margin-left:0}.pf-quote{padding:46px 48px 36px;text-align:center;background:var(--paper);border-radius:0 0 20px 20px}.pf-quote blockquote{margin:0 auto;max-width:52ch;font-family:Fraunces,serif;font-style:italic;font-weight:440;font-size:clamp(19px,2.4vw,25px);line-height:1.45;color:var(--ink)}.pf-quote blockquote b{font-style:normal;color:var(--indigo);font-weight:560}.pf-caption{margin-top:18px;font-family:IBM Plex Mono,monospace;font-size:11.5px;letter-spacing:.06em;color:var(--mist)}@media (max-width: 760px){.pf-compare{grid-template-columns:1fr;padding:36px 26px 0}.pf-hero{padding:40px 26px 52px}.pf-problem{margin:-26px 26px 0;flex-direction:column;gap:6px}.pf-quote{padding:36px 26px 28px}}.chat-paste-hint{margin:0 24px 10px;font-size:12px;line-height:1.4;color:#6b7280}@media (max-width: 640px){.chat-paste-hint{margin-left:16px;margin-right:16px}}