/* Pure Amino — FAQ page.
   Reuses the Research-Partners editorial system (paper-neutral, ink-black,
   axis rules, mono numerals). Loaded after partners.css so the shared
   --rp-* tokens, .rp-hero, .rp-btn, and .rp-foot rules are in scope; this
   file adds only the FAQ-specific hero tweaks, jump nav, and accordion. */

.faq-wrap .faq-hero {
    align-items: flex-start;
}
.faq-hero h1 em { color: var(--cat-neuro); }

/* ── Jump nav (right column of hero) ─────────────────────────────────── */
.faq-jump {
    display: flex; flex-direction: column;
    border: 1px solid var(--rp-hairline);
    background: var(--rp-paper);
}
.faq-jump a {
    display: flex; align-items: center; gap: 12px;
    padding: 15px 20px;
    border-bottom: 1px solid var(--rp-hairline);
    font-weight: 500; font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
    color: var(--rp-ink);
    transition: background .18s, padding-left .18s;
}
.faq-jump a:last-child { border-bottom: none; }
.faq-jump a .d {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--cat-neuro); flex-shrink: 0;
}
.faq-jump a .c {
    margin-left: auto;
    font-family: var(--font-mono); font-size: 11px; color: var(--rp-dim);
    letter-spacing: 0;
}
.faq-jump a:hover { background: var(--rp-paper-2); padding-left: 26px; }

/* ── FAQ groups ──────────────────────────────────────────────────────── */
.faq-group {
    padding: 56px 40px;
    border-bottom: 1px solid var(--rp-hairline);
    scroll-margin-top: 84px; /* clear the sticky nav on anchor jump */
}
.faq-group-head { margin-bottom: 12px; }

.faq-list {
    border-top: 1px solid var(--rp-hairline);
}

/* Accordion item — native <details>, no JS required. */
.faq-item {
    border-bottom: 1px solid var(--rp-hairline);
}
.faq-item summary {
    list-style: none; cursor: pointer;
    display: grid; grid-template-columns: 60px 1fr 24px; gap: 32px;
    align-items: center;
    padding: 26px 0;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:focus-visible {
    outline: 2px solid var(--rp-ink); outline-offset: 4px;
}
.faq-item summary .num {
    font-family: var(--font-mono); font-size: 11px; color: var(--rp-dim);
}
.faq-item summary .q {
    font-family: var(--font-display); font-weight: 600;
    font-size: 18px; line-height: 1.25; letter-spacing: -.015em; text-transform: uppercase;
    color: var(--rp-ink);
}

/* +/× toggle mark */
.faq-item summary .mark {
    position: relative; width: 16px; height: 16px; justify-self: center;
}
.faq-item summary .mark::before,
.faq-item summary .mark::after {
    content: ''; position: absolute; top: 50%; left: 50%;
    width: 14px; height: 1.5px; background: var(--rp-ink);
    transform: translate(-50%, -50%);
    transition: transform .24s var(--ease-standard, cubic-bezier(.2,.6,.2,1));
}
.faq-item summary .mark::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item[open] summary .mark::after { transform: translate(-50%, -50%) rotate(0); }

.faq-item .a {
    font-size: 14px; line-height: 1.75; color: var(--rp-dim);
    max-width: 62ch;
    padding: 0 0 28px 92px; /* align under the question, past the num column */
}
.faq-item .a strong { color: var(--rp-ink); }
.faq-item .a a {
    color: var(--rp-ink);
    text-decoration: underline; text-underline-offset: 3px;
    text-decoration-color: var(--rp-hairline);
}
.faq-item .a a:hover { text-decoration-color: var(--rp-ink); }

/* ── Contact CTA ─────────────────────────────────────────────────────── */
.faq-contact {
    padding: 88px 40px;
    border-bottom: 1px solid var(--rp-hairline);
}
.faq-contact h2 {
    font-family: var(--font-display); font-weight: 600;
    font-size: clamp(40px, 6vw, 88px);
    line-height: .92; letter-spacing: -.03em; text-transform: uppercase;
    margin: 18px 0 18px;
}
.faq-contact p {
    font-size: 15px; line-height: 1.7; color: var(--rp-dim);
    max-width: 56ch; margin-bottom: 32px;
}
.faq-contact-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.faq-foot .mega { color: var(--rp-ink); }

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .faq-group, .faq-contact { padding: 56px 28px; }
}

@media (max-width: 640px) {
    .faq-group, .faq-contact { padding: 48px 18px; }
    .faq-jump a { padding: 16px 18px; }
    .faq-item summary {
        grid-template-columns: 40px 1fr 20px; gap: 16px;
        padding: 22px 0;
    }
    .faq-item summary .q { font-size: 16px; }
    .faq-item .a { padding-left: 56px; }
    .faq-contact h2 { font-size: clamp(32px, 9vw, 56px); }
}