/* ==========================================================================
   hub.css - AI Search hub + spoke pages (/aeo, /aeo-technical-schema,
   /ai-citations, /content-marketing, /ai-search-playbook).
   Builds on style.css tokens and the vp-* layout from the vertical pages.
   ========================================================================== */
.vp-hero { background: var(--ink); padding: 148px 32px 88px; color: var(--cream); position: relative; overflow: hidden; }
.vp-hero::before { content:''; position:absolute; inset:0; background-image: radial-gradient(ellipse 700px 500px at 80% 20%, rgba(37,64,255,0.22), transparent 60%); pointer-events:none; }
.vp-hero-inner { max-width: 1200px; margin: 0 auto; position: relative; z-index: 1; }
.vp-crumbs { font-size: 0.78rem; color: #6B8099; margin-bottom: 22px; }
.vp-crumbs a { color: #8AA0B0; text-decoration: none; }
.vp-crumbs a:hover { color: var(--cream); }
.vp-hero h1 { font-family: var(--fsans); font-size: clamp(2.4rem, 5.5vw, 4.2rem); font-weight: 800; letter-spacing: -0.035em; line-height: 1.02; color: var(--cream); margin: 18px 0 22px; max-width: 20ch; }
.vp-hero h1 em { font-family: var(--fserif); font-style: italic; font-weight: 500; color: var(--cobalt); }
.vp-hero-sub { font-size: 1.08rem; line-height: 1.6; color: #B0BCD0; max-width: 640px; margin-bottom: 32px; }
.vp-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* The quotable short answer - first thing a human or a model reads */
.hub-answer { padding: 0 32px; margin-top: -40px; position: relative; z-index: 2; }
.hub-answer-inner { max-width: 1200px; margin: 0 auto; background: var(--white); border: 1px solid var(--line); border-left: 4px solid var(--cobalt); border-radius: 10px; padding: 30px 34px; box-shadow: 0 18px 40px -20px rgba(10,10,10,0.25); display: grid; grid-template-columns: 170px 1fr; gap: 28px; }
.hub-answer-label { font-family: var(--fserif); font-style: italic; font-size: 1.05rem; color: var(--cobalt); line-height: 1.3; }
.hub-answer-label small { display: block; font-family: var(--fsans); font-style: normal; font-size: 0.72rem; color: var(--steel); margin-top: 6px; }
.hub-answer p { font-size: 1.06rem; line-height: 1.7; color: var(--ink); margin: 0; }
.hub-answer p + p { margin-top: 12px; color: var(--slate); font-size: 0.98rem; }

.vp-section { padding: 88px 32px; }
.vp-section-inner { max-width: 1200px; margin: 0 auto; }
.vp-section.dark { background: var(--ink); color: var(--cream); }
.vp-section.paper { background: var(--paper); }
.vp-section h2 { font-family: var(--fsans); font-size: clamp(1.9rem, 4vw, 3rem); font-weight: 800; letter-spacing: -0.035em; line-height: 1.06; margin: 0 0 20px; max-width: 22ch; }
.vp-section h2 em { font-family: var(--fserif); font-style: italic; font-weight: 500; color: var(--cobalt); }
.vp-section.dark h2 { color: var(--cream); }
.vp-lead { font-size: 1.05rem; line-height: 1.7; color: var(--slate); max-width: 680px; margin-bottom: 44px; }
.vp-lead + .vp-lead { margin-top: -28px; }
.vp-section.dark .vp-lead { color: #B0BCD0; }
.vp-lead a, .hub-prose a, .pb-chapter a:not(.hub-link) { color: var(--cobalt); text-underline-offset: 3px; }

/* Cards with icon */
.hub-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.hub-card { background: var(--white); border: 1px solid var(--line); border-radius: 10px; padding: 26px 26px 28px; transition: border-color .2s ease, transform .25s cubic-bezier(0.16,1,0.3,1), box-shadow .25s ease; }
.hub-card:hover { border-color: rgba(37,64,255,0.25); transform: translateY(-3px); box-shadow: 0 14px 30px -18px rgba(37,64,255,0.4); }
.hub-card-ico { width: 40px; height: 40px; border-radius: 9px; display: grid; place-items: center; background: var(--cobalt-tint); color: var(--cobalt); margin-bottom: 16px; font-family: var(--fserif); font-style: italic; font-size: 1rem; }
.hub-card h3 { font-size: 1.02rem; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 8px; }
.hub-card p { font-size: 0.9rem; color: var(--slate); line-height: 1.6; margin: 0; }
.hub-card .hub-card-foot { margin-top: 12px; font-size: 0.78rem; color: var(--steel); }
.vp-section.dark .hub-card { background: rgba(245,239,230,0.04); border-color: rgba(245,239,230,0.08); }
.vp-section.dark .hub-card h3 { color: var(--cream); }
.vp-section.dark .hub-card p { color: #8098B4; }
.vp-section.dark .hub-card-ico { background: rgba(37,64,255,0.25); color: #7CA3FF; }

/* Steps / timeline */
.hub-steps { list-style: none; counter-reset: step; display: grid; gap: 0; max-width: 880px; padding: 0; }
.hub-steps li { counter-increment: step; display: grid; grid-template-columns: 64px 1fr; gap: 20px; padding: 22px 0; border-top: 1px solid var(--line); }
.hub-steps li:last-child { border-bottom: 1px solid var(--line); }
.hub-steps li::before { content: counter(step, decimal-leading-zero); font-family: var(--fserif); font-style: italic; font-size: 1.6rem; color: var(--cobalt); line-height: 1; }
.hub-steps .when { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); display: block; margin-bottom: 4px; }
.hub-steps h3 { font-size: 1.05rem; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 6px; }
.hub-steps p { font-size: 0.92rem; color: var(--slate); line-height: 1.6; margin: 0; }

/* Honest bit: will / won't */
.hub-honest { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hub-honest-col { border-radius: 10px; padding: 28px 30px; }
.hub-honest-col.yes { background: rgba(245,239,230,0.05); border: 1px solid rgba(245,239,230,0.1); }
.hub-honest-col.no { background: rgba(37,64,255,0.12); border: 1px solid rgba(37,64,255,0.35); }
.hub-honest-col h3 { font-family: var(--fserif); font-style: italic; font-weight: 500; font-size: 1.25rem; color: var(--cream); margin: 0 0 16px; }
.hub-honest-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.hub-honest-col li { position: relative; padding-left: 26px; font-size: 0.92rem; line-height: 1.6; color: #B0BCD0; }
.hub-honest-col li strong { color: var(--cream); font-weight: 600; }
.hub-honest-col.yes li::before { content: '\2713'; position: absolute; left: 0; color: #7CA3FF; font-weight: 700; }
.hub-honest-col.no li::before { content: '\2715'; position: absolute; left: 0; color: #7CA3FF; font-weight: 700; }

/* Proof row */
.hub-proof { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.hub-proof div { background: var(--white); border: 1px solid var(--line); border-radius: 10px; padding: 26px; }
.hub-proof b { display: block; font-size: 2.1rem; font-weight: 800; letter-spacing: -0.04em; color: var(--cobalt); line-height: 1; margin-bottom: 10px; }
.hub-proof span { font-size: 0.86rem; color: var(--slate); line-height: 1.5; display: block; }
.hub-proof-note { font-size: 0.8rem; color: var(--steel); margin-top: 18px; max-width: 760px; line-height: 1.6; }

/* Related links - tiles that echo the mega menu */
.hub-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
a.hub-link { --mx: 50%; --my: 50%; position: relative; isolation: isolate; display: flex; flex-direction: column; gap: 6px; padding: 20px 22px; border: 1px solid var(--line); border-radius: 10px; background: var(--cream); text-decoration: none; color: var(--ink); transition: border-color .2s ease, transform .25s cubic-bezier(0.16,1,0.3,1); }
a.hub-link::before { content:''; position: absolute; inset: 0; border-radius: inherit; z-index: -1; opacity: 0; background: radial-gradient(200px circle at var(--mx) var(--my), rgba(37,64,255,0.12), transparent 70%); transition: opacity .25s ease; }
a.hub-link:hover { border-color: rgba(37,64,255,0.3); transform: translateY(-2px); }
a.hub-link:hover::before { opacity: 1; }
.hub-link-kind { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cobalt); }
.hub-link-title { font-size: 0.98rem; font-weight: 700; letter-spacing: -0.015em; line-height: 1.3; }
.hub-link-title::after { content: ' \2192'; color: var(--cobalt); display: inline-block; transition: transform .25s cubic-bezier(0.16,1,0.3,1); }
a.hub-link:hover .hub-link-title::after { transform: translateX(4px); }
.vp-section.paper a.hub-link { background: var(--white); }

/* Prose block */
.hub-prose { max-width: 720px; }
.hub-prose p { font-size: 1.02rem; line-height: 1.75; color: var(--slate); margin: 0 0 16px; }
.hub-prose p strong { color: var(--ink); }
.vp-section.dark .hub-prose p { color: #B0BCD0; }
.vp-section.dark .hub-prose p strong { color: var(--cream); }
.hub-split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.hub-quote { font-family: var(--fserif); font-style: italic; font-size: clamp(1.4rem, 2.6vw, 2rem); line-height: 1.3; color: var(--ink); border-left: 3px solid var(--cobalt); padding-left: 24px; }
.hub-quote small { display: block; font-family: var(--fsans); font-style: normal; font-size: 0.8rem; color: var(--steel); margin-top: 14px; }

/* FAQ */
.vp-faq { padding: 88px 32px; }
.vp-faq-inner { max-width: 1200px; margin: 0 auto; }
.vp-faq h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; letter-spacing: -0.035em; line-height: 1.06; margin: 0 0 36px; }
.vp-faq h2 em { font-family: var(--fserif); font-style: italic; font-weight: 500; color: var(--cobalt); }
.vp-faq .faq-list { max-width: 880px; }

/* CTA */
.vp-cta { background: var(--ink); padding: 96px 32px; text-align: center; }
.vp-cta-inner { max-width: 680px; margin: 0 auto; }
.vp-cta h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; letter-spacing: -0.035em; color: var(--cream); margin: 16px 0 20px; line-height: 1.06; }
.vp-cta h2 em { font-family: var(--fserif); font-style: italic; color: var(--cobalt); font-weight: 500; }
.vp-cta p { font-size: 1rem; color: #B0BCD0; line-height: 1.6; margin-bottom: 32px; }
.vp-cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* Playbook */
.pb-wrap { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 240px 1fr; gap: 64px; align-items: start; }
.pb-toc { position: sticky; top: 92px; }
.pb-toc-label { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); margin-bottom: 12px; }
.pb-toc ol { list-style: none; padding: 0; margin: 0; counter-reset: toc; border-left: 1px solid var(--line); }
.pb-toc li { counter-increment: toc; }
.pb-toc a { display: flex; gap: 10px; padding: 7px 0 7px 16px; margin-left: -1px; border-left: 2px solid transparent; font-size: 0.86rem; color: var(--slate); text-decoration: none; transition: color .15s, border-color .15s; }
.pb-toc a::before { content: counter(toc, decimal-leading-zero); font-family: var(--fserif); font-style: italic; color: var(--cobalt); font-size: 0.8rem; }
.pb-toc a:hover, .pb-toc a.on { color: var(--ink); border-left-color: var(--cobalt); }
.pb-chapter { padding: 8px 0 56px; border-bottom: 1px solid var(--line); margin-bottom: 56px; scroll-margin-top: 90px; }
.pb-chapter:last-child { border-bottom: none; margin-bottom: 0; }
.pb-num { font-family: var(--fserif); font-style: italic; color: var(--cobalt); font-size: 1rem; margin-bottom: 8px; }
.pb-chapter h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800; letter-spacing: -0.035em; line-height: 1.08; margin: 0 0 18px; max-width: 24ch; }
.pb-chapter h2 em { font-family: var(--fserif); font-style: italic; font-weight: 500; color: var(--cobalt); }
.pb-chapter > p { font-size: 1.02rem; line-height: 1.75; color: var(--slate); margin: 0 0 16px; max-width: 720px; }
.pb-chapter > p strong { color: var(--ink); }
.pb-check { list-style: none; padding: 22px 26px; margin: 22px 0; background: var(--white); border: 1px solid var(--line); border-radius: 10px; display: grid; gap: 10px; max-width: 720px; }
.pb-check li { position: relative; padding-left: 30px; font-size: 0.93rem; line-height: 1.55; color: var(--ink); }
.pb-check li::before { content: ''; position: absolute; left: 0; top: 2px; width: 16px; height: 16px; border: 2px solid var(--cobalt); border-radius: 4px; }
.pb-check li span { color: var(--slate); }
.pb-note { max-width: 720px; padding: 16px 20px; border-radius: 8px; background: var(--cobalt-tint); font-size: 0.9rem; line-height: 1.6; color: var(--ink); margin: 18px 0; }
.pb-note b { color: var(--cobalt); }
.pb-more { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.pb-more a { font-size: 0.84rem; font-weight: 600; color: var(--ink); text-decoration: none; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); transition: border-color .15s, color .15s; }
.pb-more a:hover { border-color: var(--cobalt); color: var(--cobalt); }
.pb-table { width: 100%; max-width: 760px; border-collapse: collapse; margin: 18px 0; font-size: 0.9rem; }
.pb-table th, .pb-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; line-height: 1.5; }
.pb-table th { font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--steel); font-weight: 600; }
.pb-table td:first-child { font-weight: 700; white-space: nowrap; }
.pb-table td { color: var(--slate); }

@media (max-width: 960px) {
  .hub-cards, .hub-links, .hub-proof { grid-template-columns: 1fr 1fr; }
  .hub-split, .hub-honest { grid-template-columns: 1fr; gap: 24px; }
  .pb-wrap { grid-template-columns: 1fr; gap: 32px; }
  .pb-toc { position: static; }
}
@media (max-width: 600px) {
  .vp-hero { padding: 116px 16px 76px; }
  .vp-section, .vp-faq { padding: 64px 16px; }
  .hub-answer { padding: 0 16px; }
  .hub-answer-inner { grid-template-columns: 1fr; gap: 10px; padding: 24px 22px; }
  .hub-cards, .hub-links, .hub-proof { grid-template-columns: 1fr; }
  .hub-steps li { grid-template-columns: 44px 1fr; gap: 12px; }
  .vp-cta { padding: 72px 16px; }
  .pb-table td:first-child { white-space: normal; }
}

/* Small cobalt text fails contrast on ink - lift it on dark backgrounds */
.vp-hero .hero-eyebrow-pill { color: #9DB6FF; border-color: rgba(124,163,255,0.35); background: rgba(37,64,255,0.16); }
.vp-hero h1 em, .vp-section.dark h2 em, .vp-cta h2 em { color: #6F8BFF; }
.hub-steps .when, .hub-proof-note, .hub-quote small, .pb-toc-label, .pb-table th, .hub-answer-label small, .hub-card .hub-card-foot { color: var(--slate); }

/* Playbook author block */
.pb-author-wrap { padding-bottom: 0; padding-top: 72px; }
.pb-author { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 88px 1fr; gap: 28px; padding: 30px 34px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.pb-author img { width: 88px; height: 88px; border-radius: 50%; object-fit: cover; }
.pb-author-kicker { font-family: var(--fserif); font-style: italic; font-size: 1.05rem; color: var(--cobalt); margin-bottom: 10px; }
.pb-author p { font-size: 0.98rem; line-height: 1.7; color: var(--slate); margin: 0 0 12px; max-width: 760px; }
.pb-author p:last-child { margin-bottom: 0; }
.pb-author p strong { color: var(--ink); }
@media (max-width: 600px) { .pb-author { grid-template-columns: 1fr; padding: 24px 20px; } .pb-author-wrap { padding-top: 56px; } }