/* founder-brain: three answers become rules, then a live visitor question is answered using those rules.
   Prefix .hero-founder-brain / .fb- */
.hero-founder-brain .fb-in{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.86fr) minmax(0,1fr);gap:clamp(16px,2.2vw,28px);align-items:start;padding:clamp(24px,3vw,40px) clamp(14px,2vw,26px) clamp(36px,4vw,52px);min-height:520px}
.hero-founder-brain .fb-lbl{margin:0 0 14px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-3)}

/* column 1: the interview, on warm paper */
.hero-founder-brain .fb-col-you{background:#F7F2EC;border-radius:var(--r-tile);padding:20px 18px 24px;border:1px solid rgba(23,19,17,.08)}
.hero-founder-brain .fb-cards{display:grid;gap:12px}
.hero-founder-brain .fb-card{border-radius:16px;padding:14px 16px;background:#fff;border:1px solid rgba(23,19,17,.08);box-shadow:0 14px 30px -22px rgba(23,19,17,.35)}
.hero-founder-brain .fb-q{margin:0 0 6px;font-family:'Instrument Serif',Georgia,serif;font-size:17px;line-height:1.15;color:#171311}
.hero-founder-brain .fb-a{margin:0;font-size:13px;line-height:1.4;color:#5B4E45}

/* column 2: the rules, lit as each answer lands */
.hero-founder-brain .fb-col-logic{position:relative;padding-top:44px;min-height:100%;display:flex;flex-direction:column;justify-content:center}
.hero-founder-brain .fb-col-logic .fb-lbl{position:absolute;top:0;left:0}
.hero-founder-brain .fb-rules{display:grid;gap:14px}
.hero-founder-brain .fb-rule{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;padding:12px 14px;border-radius:14px;background:var(--bg-2);border:1px solid var(--line);font-family:var(--font-mono);font-size:12px;color:var(--text-2);transition:background .4s var(--ease),border-color .4s var(--ease),box-shadow .4s var(--ease)}
.hero-founder-brain .fb-rule i{font-style:normal}
.hero-founder-brain .fb-rule b{font-weight:400;color:var(--accent)}
.hero-founder-brain .fb-rule.is-lit{background:var(--accent-tint);border-color:rgba(36,87,255,.35);color:var(--ink);box-shadow:0 0 0 1px rgba(36,87,255,.15)}
.hero-founder-brain .fb-dot{position:absolute;left:0;top:0;z-index:6;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px 3px rgba(36,87,255,.55);pointer-events:none}

/* column 3: the live reply, dark */
.hero-founder-brain .fb-col-live{background:#171311;color:#F7F2EC;border-radius:var(--r-tile);padding:20px 18px 22px;display:flex;flex-direction:column;gap:12px}
.hero-founder-brain .fb-col-live .fb-lbl{color:rgba(247,242,236,.55)}
.hero-founder-brain .fb-chat{display:flex;flex-direction:column;gap:12px}
.hero-founder-brain .fb-visitor{align-self:flex-start;max-width:88%;margin:0;padding:9px 13px;border-radius:14px 14px 14px 4px;background:rgba(247,242,236,.1);font-size:13px;line-height:1.4;color:#F7F2EC}
.hero-founder-brain .fb-trace{display:grid;gap:6px;padding:2px 2px 2px 4px;border-left:2px solid rgba(36,87,255,.4)}
.hero-founder-brain .fb-trace p{margin:0;padding-left:10px;font-size:11px;line-height:1.5;color:rgba(247,242,236,.55);position:relative}
.hero-founder-brain .fb-trace p::before{content:"";position:absolute;left:-15px;top:6px;width:6px;height:6px;border-radius:50%;background:rgba(247,242,236,.25)}
.hero-founder-brain .fb-trace p.is-said{color:#7FB0FF}
.hero-founder-brain .fb-trace p.is-said::before{background:#2457FF;box-shadow:0 0 8px 2px rgba(36,87,255,.6)}
.hero-founder-brain .fb-reply{align-self:flex-end;max-width:92%;margin:0;padding:10px 14px;border-radius:14px 14px 4px 14px;background:#2457FF;color:#fff;font-size:13px;line-height:1.42}
.hero-founder-brain .fb-tag{align-self:flex-end;font-family:var(--font-mono);font-size:10px;letter-spacing:.04em;color:#7FE3B6;display:inline-flex;align-items:center;gap:5px}
.hero-founder-brain .fb-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:#1DBF73}

@media (max-width:900px){
  .hero-founder-brain .fb-in{grid-template-columns:minmax(0,1fr);min-height:0;padding:18px 14px 40px;gap:22px}
  .hero-founder-brain .fb-col-logic{padding-top:0}
  .hero-founder-brain .fb-col-logic .fb-lbl{position:static}
}