/* ==========================================================================
   AI Hub v2: hub index pages (T19): Agents, Platforms, Solutions, Resources.
   Loads after system.css.  Everything here is page-level; spacing uses the system tokens.

   Contents
    1  Shared bits (wide hero, chips, section variants)
    2  Product grid (agents 3 x 3, platforms 4 x 2) on the system .pcard
    3  Which agent first? (pill tabs + split panel extras)
    4  Agents and platforms explainer (trio + example rows)
    5  ERP Pro modular map (base panel + hairline grid)
    6  Solutions cards (department, industry, buyer)
    7  Featured use-case cards
    8  Resources doors and featured guide
    9  FAQ in two columns (L-19)
   10  Responsive
   ========================================================================== */

/* ---------- 1. Shared bits ---------- */
@media (min-width: 1101px) { .hero__grid--wide { grid-template-columns: minmax(0, 8.6fr) minmax(0, 4.4fr); } }
.chip--line { background: transparent; border: 1px solid var(--line-strong); color: var(--ink-2); }
.hub-tabs .pills { margin-bottom: var(--gap-head); }
.hub-tabs .tabpanel.is-card-panel { display: block; }

/* ---------- 2. Product grid: same-size cards, whole card is the link ---------- */
.pgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 24px); }
.pgrid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.pgrid .pcard { flex: none; min-width: 0; }
.pgrid--4 .pcard__name { font-size: 1.3125rem; }
.pgrid--4 .pcard__body { padding: 18px 20px 20px; }
.pgrid .pcard__line { font-size: 1rem; }

/* ---------- 3. Which agent first? ---------- */
.hub-split { min-height: 0; }
.pick__label { font-size: .75rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.pick { display: grid; gap: 12px; }
.ucard { width: 100%; }
.ucard__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; }
.ucard__top .icon { width: 18px; height: 18px; color: var(--ink-3); transition: transform var(--t); }
.ucard:hover .ucard__top .icon { transform: translateX(3px); }
.pick__d { color: var(--ink-2); font-size: .9375rem; line-height: 1.5; }
.split__products a { color: var(--ink); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--coral); }
.split__products a:hover { color: var(--coral-text); }
.split__dark .eyebrow { margin-bottom: -4px; }

/* ---------- 4. Agents and platforms: three columns, then example rows ---------- */
.trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.trio__item { display: flex; flex-direction: column; gap: 10px; padding: 4px clamp(20px, 2.4vw, 32px) 12px; border-left: 1px solid var(--line-strong); }
.trio__n { font-size: .8125rem; font-weight: 600; letter-spacing: .16em; color: var(--coral-text); }
.trio__item .icon { width: 44px; height: 44px; margin: clamp(20px, 2.4vw, 32px) 0 clamp(16px, 2vw, 24px); color: var(--coral-text); stroke-width: 1.15; }
.trio__item h3 { font-family: var(--font-serif); font-weight: 600; font-size: 1.5rem; line-height: 1.2; letter-spacing: -.01em; }
.trio__item p:last-child { color: var(--ink-2); font-size: 1rem; line-height: 1.6; }
.flowrows { margin-top: var(--gap-block); border-top: 1px solid var(--line-strong); }
.flowrows__label { margin: clamp(28px, 3vw, 40px) 0 14px; }
.flowrow { display: grid; grid-template-columns: 48px minmax(0, 1fr) minmax(0, 1.5fr) auto; gap: 8px clamp(16px, 2.4vw, 32px); align-items: center; padding: 20px 0; border-bottom: 1px solid var(--line-strong); }
.flowrow__n { font-size: .8125rem; font-weight: 600; letter-spacing: .16em; color: var(--coral-text); }
.flowrow__t { font-family: var(--font-serif); font-weight: 600; font-size: 1.3125rem; line-height: 1.25; letter-spacing: -.01em; }
.flowrow__d { color: var(--ink-2); font-size: 1rem; line-height: 1.55; }
.flowrow__chips { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; justify-content: flex-end; }
.flowrow__chips .icon { width: 16px; height: 16px; color: var(--ink-3); }

/* ---------- 5. ERP Pro modular map ---------- */
.erp__base { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: clamp(24px, 4vw, 64px); align-items: center; padding: clamp(28px, 3.4vw, 48px); background: var(--dark); color: var(--on-dark); --focus: #F2EFE6; border-radius: var(--r-lg); }
.erp__base .h3 { font-size: clamp(1.5rem, 1.2vw + 1.1rem, 2rem); margin-top: 10px; }
.erp__base .small { margin-top: 10px; }
.erp__items { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
.erp__items li { display: flex; gap: 12px; align-items: center; padding: 13px 0; border-top: 1px solid var(--line-dark); font-size: 1rem; line-height: 1.35; }
.erp__items li:nth-child(-n+2) { border-top: 0; }
.erp__items .icon { width: 18px; height: 18px; color: var(--coral-lt); }
.erp__join { display: grid; justify-items: center; gap: 10px; padding: 18px 0 20px; }
.erp__join::before { content: ''; width: 1px; height: 28px; background: var(--line-strong); }
.erp__join .micro { text-transform: uppercase; letter-spacing: .14em; font-weight: 600; }
.erp__map .hgrid__cell { min-height: 160px; }
.erp__map .hgrid__cell .icon { margin-bottom: 18px; }
.erp__map .hgrid__cell h3 { font-size: 1.25rem; }
.erp__cap { margin-top: clamp(24px, 3vw, 36px); text-align: center; font-family: var(--font-serif); font-style: italic; font-size: clamp(1.125rem, .6vw + 1rem, 1.375rem); color: var(--ink-2); text-wrap: balance; }

/* ---------- 6. Solutions cards: icon, name, pain, promise, chips ---------- */
.sgrid { display: grid; gap: clamp(16px, 2vw, 24px); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.sgrid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.scard { position: relative; display: flex; flex-direction: column; gap: 14px; height: 100%; padding: clamp(24px, 2.6vw, 32px); background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.scard__top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 6px; }
.scard .icon-tile { width: 56px; height: 56px; border-radius: 15px; }
.scard .icon-tile .icon { width: 26px; height: 26px; }
.scard__go { display: grid; place-items: center; flex: none; width: 40px; height: 40px; border-radius: 50%; background: color-mix(in srgb, var(--ink) 8%, transparent); color: var(--ink); transition: transform var(--t); }
.scard__go .icon { width: 18px; height: 18px; transition: transform var(--t); }
.scard:hover .scard__go .icon { transform: translateX(2px); }
.scard__name { font-family: var(--font-serif); font-weight: 600; font-size: clamp(1.3125rem, .6vw + 1.1rem, 1.5rem); line-height: 1.2; letter-spacing: -.01em; }
.scard__link::after { content: ''; position: absolute; inset: 0; z-index: 1; border-radius: 16px; }   /* whole card is the link */
.scard__link:focus-visible { outline: none; }
.scard:has(.scard__link:focus-visible) { outline: 3px solid var(--focus); outline-offset: 3px; }
.scard__pain { color: var(--ink-3); font-size: 1rem; line-height: 1.55; text-wrap: pretty; }
.scard__promise { color: var(--ink); font-weight: 500; font-size: 1rem; line-height: 1.55; text-wrap: pretty; }
.scard__foot { margin-top: auto; padding-top: 18px; border-top: 1px solid var(--line); display: grid; gap: 10px; }
.scard__chips { display: flex; flex-wrap: wrap; gap: 8px; }
.scard__detail { color: var(--ink-2); font-size: .9375rem; line-height: 1.55; }

/* ---------- 7. Featured use-case cards (same look as the library cards) ---------- */
.ugrid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2vw, 24px); }
.ugrid > li { display: flex; }
.uccard { position: relative; display: flex; flex-direction: column; gap: 12px; width: 100%; padding: clamp(22px, 2.2vw, 28px); background: var(--white); border: 1px solid var(--line); border-radius: 16px; }
.uccard__dept { font-size: .75rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--coral-text); }
.uccard__title { font-family: var(--font-serif); font-weight: 600; font-size: 1.1875rem; line-height: 1.28; letter-spacing: -.01em; text-wrap: balance; }
.uccard__link::after { content: ''; position: absolute; inset: 0; z-index: 1; border-radius: 16px; }
.uccard__link:focus-visible { outline: none; }
.uccard:has(.uccard__link:focus-visible) { outline: 3px solid var(--focus); outline-offset: 3px; }
.uccard__line { color: var(--ink-2); font-size: .9375rem; line-height: 1.6; text-wrap: pretty; }
.uccard__chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2px; }
.uccard__foot { margin-top: auto; padding-top: 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-top: 1px solid var(--line); }
.uccard__ind { font-size: .8125rem; line-height: 1.45; color: var(--ink-3); }
.uccard__go { display: grid; place-items: center; flex: none; width: 36px; height: 36px; border-radius: 50%; background: color-mix(in srgb, var(--ink) 8%, transparent); color: var(--ink); }
.uccard__go .icon { width: 16px; height: 16px; transition: transform var(--t); }
.uccard:hover .uccard__go .icon { transform: translateX(2px); }
.ugrid__more { margin-top: var(--gap-block); display: flex; justify-content: center; }

/* ---------- 8. Resources: three doors, featured guide ---------- */
.doors { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 24px); }
.door { display: flex; flex-direction: column; gap: 18px; padding: clamp(24px, 2.6vw, 32px); background: var(--white); border: 1px solid var(--line); border-radius: var(--r-lg); }
.door__name { font-family: var(--font-serif); font-weight: 600; font-size: 1.75rem; line-height: 1.15; letter-spacing: -.01em; }
.door__line { color: var(--ink-2); font-size: 1.0625rem; line-height: 1.5; margin-top: -6px; }
.door__label { font-size: .75rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-top: 6px; }
.door__list { border-bottom: 1px solid var(--line); }
.door__item { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 16px; padding: 14px 0; border-top: 1px solid var(--line); font-weight: 500; line-height: 1.4; transition: color var(--t); }
.door__item--thumb { grid-template-columns: 96px minmax(0, 1fr) auto; }
.door__item:hover { color: var(--coral-text); }
.door__item .icon { width: 18px; height: 18px; color: var(--ink-3); transition: transform var(--t); }
.door__item:hover .icon { transform: translateX(3px); color: inherit; }
.door__thumb { width: 96px; aspect-ratio: 16 / 9; border-radius: 8px; overflow: hidden; background: var(--tan); border: 1px solid var(--line); }
.door__thumb img { width: 100%; height: 100%; object-fit: cover; }
.door__foot { margin-top: auto; display: grid; gap: 4px; }
.door__foot .micro { margin-top: 2px; }
.fguide { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); align-items: center; }
.gcover { justify-self: center; width: min(100%, 320px); aspect-ratio: 3 / 4; display: flex; flex-direction: column; justify-content: space-between; padding: clamp(24px, 3vw, 36px); background: var(--dark); color: var(--on-dark); border-radius: 14px; box-shadow: var(--shadow-frame); border-left: 8px solid var(--coral); }
.gcover__eyebrow { font-size: .6875rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--coral-lt); }
.gcover__title { font-family: var(--font-serif); font-weight: 600; font-size: clamp(1.5rem, 1.4vw + 1rem, 2rem); line-height: 1.15; letter-spacing: -.01em; }
.gcover__title em { display: block; font-style: italic; font-weight: 500; color: var(--coral-lt); }
.gcover__foot { font-size: .8125rem; color: var(--on-dark-3); }
.fguide__copy { display: grid; gap: 18px; justify-items: start; }
.fguide__copy .lead { max-width: 30em; }

/* ---------- 9. FAQ in two columns (L-19): heading left, accordion right ---------- */
.faq { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.faq__head { display: grid; gap: 20px; position: sticky; top: calc(var(--header-h) + 32px); }

/* ---------- 10. Responsive ---------- */
@media (max-width: 1100px) {
  .pgrid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ugrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .doors { grid-template-columns: 1fr; }
  .flowrow { grid-template-columns: 40px minmax(0, 1fr) minmax(0, 1.4fr); }
  .flowrow__chips { grid-column: 2 / -1; justify-content: flex-start; }
}
@media (max-width: 1000px) {
  .faq, .fguide, .erp__base { grid-template-columns: 1fr; }
  .faq__head { position: static; }
  .sgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .trio { grid-template-columns: 1fr; }
  .trio__item { border-left: 0; padding: 28px 0; border-top: 1px solid var(--line-strong); }
  .trio__item:first-child { border-top: 0; padding-top: 4px; }
  .trio__item .icon { margin: 14px 0; }
  .pgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .pgrid, .pgrid--4, .sgrid, .sgrid--2, .ugrid { grid-template-columns: 1fr; }
  .flowrow { grid-template-columns: 1fr; gap: 6px; padding: 18px 0; }
  .flowrow__chips { grid-column: auto; margin-top: 6px; }
  .erp__items { grid-template-columns: 1fr; }
  .erp__items li:nth-child(2) { border-top: 1px solid var(--line-dark); }
  .door__item--thumb { grid-template-columns: 80px minmax(0, 1fr) auto; }
  .door__thumb { width: 80px; }
}

/* ---------- 11. Centred text link under a section, and the example rows that follow the label directly ---------- */
.hub-cta { margin-top: var(--gap-block); display: flex; justify-content: center; }
.flowrows--flush { margin-top: 0; }