/* =========================================================
   NASDAN — AI & Machine Learning page
   Dominant visual metaphor: Intelligence Pipeline
   (DATA → MODEL → INSIGHT → DECISION → ACTION)
   Extends tokens.css / main.css. Section-specific styles only.
   ========================================================= */

/* =========================================================
   1. HERO — intelligence pipeline
   ========================================================= */
/* Hero background matches the Contact page's treatment exactly: same navy
   gradient, same soft dot pattern (not the previous bottom-anchored radial
   field), same amber glow stripe -- see .contact-hero / .contact-hero::before
   / .contact-hero-stripe in contact.css (also ported this way to .hwb-hero,
   .cli-hero, .dvo-hero and .cyb-hero on the other service pages). */
.ai-hero {
  position: relative;
  padding-block: var(--sp-9) var(--sp-8);
  background: linear-gradient(150deg, var(--nasdan-navy) 0%, var(--nasdan-navy-700) 100%);
  overflow: hidden;
}
.ai-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.16) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(150deg, rgba(0,0,0,0.9) 0%, transparent 60%);
  mask-image: linear-gradient(150deg, rgba(0,0,0,0.9) 0%, transparent 60%);
  pointer-events: none;
}
.ai-hero-stripe {
  position: absolute; top: -10%; right: -8%; width: 46%; aspect-ratio: 1/1;
  background: radial-gradient(circle, rgba(255,193,7,0.28) 0%, rgba(255,193,7,0) 70%);
  filter: blur(6px);
}
.ai-hero-inner { position: relative; z-index: 1; max-width: 680px; text-align: left; margin-inline: auto; text-align: center; margin-bottom: var(--sp-8); }
.ai-hero-eyebrow { display: inline-flex; align-items: center; gap: var(--sp-2); margin-bottom: var(--sp-3); color: var(--nasdan-amber); justify-content: center; }
.ai-hero-eyebrow .eyebrow-mark { background: var(--nasdan-amber); }
.ai-hero-headline {
  font-size: var(--fs-h1); font-weight: var(--fw-light); letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight); color: var(--white); margin-bottom: var(--sp-4); margin-inline: auto; max-width: 18ch;
}
.ai-hero-lead { font-size: var(--fs-body); max-width: 56ch; margin-inline: auto; margin-bottom: var(--sp-6); color: var(--paper-300); }
.ai-hero-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; justify-content: center; }
.ai-hero-actions .btn-ghost-nasdan { color: var(--white); border-color: rgba(255,255,255,0.32); }
.ai-hero-actions .btn-ghost-nasdan:hover { background: rgba(255,255,255,0.08); border-color: var(--white); }

/* --- pipeline strip --- */
.ai-pipeline { position: relative; z-index: 1; }
.ai-pipeline-track {
  display: flex; align-items: center; justify-content: center; gap: var(--sp-3);
  overflow-x: auto; padding: var(--sp-3) var(--sp-2) var(--sp-2);
}
.ai-pipe-node { flex: none; display: flex; flex-direction: column; align-items: center; gap: var(--sp-3); }
.ai-pipe-connector { flex: none; width: 34px; height: 1px; background: repeating-linear-gradient(90deg, rgba(255,255,255,0.3) 0 4px, transparent 4px 8px); margin-bottom: 30px; }

.ai-pipe-icon {
  width: 96px; height: 96px; border-radius: 20px; background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.14); display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.ai-pipe-label { font-size: 0.8125rem; font-weight: var(--fw-medium); color: var(--paper-300); letter-spacing: var(--ls-wide); }
.ai-pipe-label--amber { color: var(--nasdan-amber); }
.ai-pipe-node--final .ai-pipe-icon { border-color: rgba(255,193,7,0.5); }

.ai-pipe-icon--data { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 18px; }
.ai-pipe-icon--data span { border-radius: 5px; background: rgba(255,255,255,0.18); }
.ai-pipe-icon--data span:nth-child(1) { height: 22px; }
.ai-pipe-icon--data span:nth-child(2) { height: 32px; background: rgba(255,193,7,0.3); }
.ai-pipe-icon--data span:nth-child(3) { height: 32px; }
.ai-pipe-icon--data span:nth-child(4) { height: 22px; background: rgba(255,193,7,0.3); }

.ai-pipe-icon--model { position: relative; }
.ai-model-lines { position: absolute; inset: 16px; width: calc(100% - 32px); height: calc(100% - 32px); }
.ai-model-node { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--nasdan-amber); }
.ai-mn-1 { top: 20px; left: 20px; } .ai-mn-2 { bottom: 20px; left: 20px; }
.ai-mn-3 { top: 20px; right: 20px; } .ai-mn-4 { bottom: 20px; right: 20px; }

.ai-insight-bars { display: flex; align-items: flex-end; gap: 8px; height: 54px; }
.ai-insight-bars span { display: block; width: 10px; height: var(--h); border-radius: 3px; background: var(--nasdan-amber); }
.ai-insight-bars span:nth-child(2), .ai-insight-bars span:nth-child(4) { background: rgba(255,255,255,0.4); }

.ai-decision-check {
  width: 52px; height: 52px; border-radius: 50%; background: rgba(255,193,7,0.14);
  border: 1px solid rgba(255,193,7,0.4); display: flex; align-items: center; justify-content: center; color: var(--nasdan-amber);
}
.ai-decision-check svg { width: 26px; height: 26px; }

.ai-pipe-icon--action { background: var(--nasdan-amber); border-color: var(--nasdan-amber); }
.ai-pipe-icon--action span { width: 34px; height: 34px; border-radius: 50%; background: var(--nasdan-navy); position: relative; }
.ai-pipe-icon--action span::before, .ai-pipe-icon--action span::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(11,22,63,0.4);
  animation: aiActionPulse 2.2s var(--ease-out) infinite;
}
.ai-pipe-icon--action span::after { animation-delay: 1.1s; }
@keyframes aiActionPulse { 0% { transform: scale(1); opacity: 0.7; } 100% { transform: scale(2.2); opacity: 0; } }

/* =========================================================
   3. WHAT WE BUILD — horizontal tabs, two-column panel content
   ========================================================= */
.ai-build { padding-block: var(--section-pad-y); }
.ai-build-head { display: grid; grid-template-columns: 0.85fr 1fr; gap: var(--sp-8); align-items: start; }
.ai-build-head .text-h2 { margin-bottom: 0; }
.ai-build-head .text-lead { color: var(--ink-500); padding-top: 0.4rem; }

.ai-build-tabs { display: flex; gap: var(--sp-2); flex-wrap: wrap; margin-top: var(--sp-8); border-bottom: 1px solid var(--ink-200); }
.ai-build-tab {
  font-family: var(--font-sans); font-size: 0.9375rem; font-weight: var(--fw-medium); color: var(--ink-500);
  background: none; border: none; padding: var(--sp-3) var(--sp-4); cursor: pointer; position: relative;
  border-bottom: 2px solid transparent; margin-bottom: -1px; transition: color var(--dur-base) var(--ease-out);
}
.ai-build-tab:hover { color: var(--ink-900); }
.ai-build-tab.is-active { color: var(--nasdan-navy); border-bottom-color: var(--nasdan-amber); }

.ai-build-panels { margin-top: var(--sp-8); }
.ai-build-panel { display: none; }
.ai-build-panel.is-active { display: block; animation: aiPanelFade 0.35s var(--ease-out); }
@keyframes aiPanelFade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.ai-build-panel-grid { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: var(--sp-9); align-items: start; }
.ai-build-panel-copy h3 { font-size: 1.6rem; font-weight: var(--fw-light); letter-spacing: var(--ls-tight); color: var(--ink-900); margin-bottom: var(--sp-3); max-width: 16ch; }
.ai-build-panel-copy p { color: var(--ink-500); line-height: var(--lh-relaxed); }

.ai-build-panel-list { display: grid; grid-template-columns: 1fr 1fr; column-gap: var(--sp-7); row-gap: var(--sp-5); }
.ai-build-item { position: relative; padding-left: var(--sp-5); }
.ai-build-item::before {
  content: ""; position: absolute; left: 0; top: 0.5em; width: 8px; height: 8px; border-radius: 50%; background: var(--nasdan-amber);
}
.ai-build-item strong { display: block; font-size: 0.9375rem; font-weight: var(--fw-medium); color: var(--ink-900); margin-bottom: 0.3rem; }
.ai-build-item p { font-size: 0.875rem; color: var(--ink-500); line-height: var(--lh-relaxed); }

/* =========================================================
   3b. SOLUTIONS WE DELIVER — concrete product-type card grid
   ========================================================= */
.ai-solutions { padding-block: var(--section-pad-y); background: var(--cloud); }
.ai-solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); margin-top: var(--sp-8); }
.ai-solution-card { padding: var(--sp-5); background: var(--white); border-radius: var(--radius-md); border: 1px solid var(--ink-200); }
.ai-solution-card h3 { font-size: 1.0625rem; font-weight: var(--fw-medium); color: var(--ink-900); margin-bottom: var(--sp-2); }
.ai-solution-card p { font-size: 0.9375rem; color: var(--ink-500); line-height: var(--lh-relaxed); }

/* Amber fill with navy text/link, same contrast treatment as the site's
   other amber-background sections (see .industries-section--amber in
   main.css, and .porto-inline-cta / .cli-inline-cta / .dvo-inline-cta /
   .mit-inline-cta on the other service pages). */
.ai-inline-cta {
  margin-top: var(--sp-8); display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6); background: var(--nasdan-amber); border: 1px solid transparent; border-radius: var(--radius-md);
  flex-wrap: wrap;
}
.ai-inline-cta span:first-child { font-size: 0.9375rem; font-weight: var(--fw-medium); color: var(--nasdan-navy); }
.ai-inline-cta .btn-link-nasdan { color: var(--nasdan-navy); border-color: rgba(11,22,63,0.3); }
.ai-inline-cta .btn-link-nasdan:hover { border-color: var(--nasdan-navy); }

/* =========================================================
   4. DATA READINESS — navy section, checklist
   ========================================================= */
.ai-readiness { padding-block: var(--section-pad-y); background: var(--nasdan-navy); }
.ai-readiness-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-8); align-items: center; }
.ai-readiness-copy .btn-link-nasdan { margin-top: var(--sp-5); }
.ai-readiness-checklist { display: flex; flex-direction: column; gap: var(--sp-4); }
.ai-check-row { display: flex; gap: var(--sp-4); align-items: flex-start; padding: var(--sp-4); border: 1px solid rgba(255,255,255,0.12); border-radius: var(--radius-md); background: rgba(255,255,255,0.04); }
.ai-check-mark {
  flex: none; width: 26px; height: 26px; border-radius: 50%; background: rgba(255,193,7,0.16);
  border: 1px solid rgba(255,193,7,0.4); color: var(--nasdan-amber); display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
}
.ai-check-row strong { display: block; color: var(--white); font-size: 0.9375rem; font-weight: var(--fw-medium); margin-bottom: 0.25rem; }
.ai-check-row p { color: var(--paper-300); font-size: 0.8438rem; }

/* =========================================================
   4b. AI DELIVERY PIPELINE — 5-step process rail
   ========================================================= */
.ai-process { padding-block: var(--section-pad-y); background: var(--cloud); }
.ai-process-rail { display: flex; align-items: stretch; gap: var(--sp-3); margin-top: var(--sp-8); }
.ai-process-step { flex: 1; padding: var(--sp-5); border-radius: var(--radius-md); border: 1px solid var(--ink-200); background: var(--white); }
/* Solid NASDAN amber (not the pale amber-100 tint), same contrast
   treatment as the site's other amber-background elements: navy for the
   label/heading, ink-700 for body copy instead of the lighter ink-500
   (see .dvo-process-step--final on the DevOps page). */
.ai-process-step--final { border-color: transparent; background: var(--nasdan-amber); }
.ai-process-num { display: block; font-size: 0.75rem; font-weight: var(--fw-semibold); color: var(--ink-400); letter-spacing: var(--ls-wide); margin-bottom: var(--sp-3); }
.ai-process-step--final .ai-process-num { color: var(--nasdan-navy); }
.ai-process-step h3 { font-size: 1rem; font-weight: var(--fw-medium); color: var(--ink-900); margin-bottom: var(--sp-2); }
.ai-process-step p { font-size: 0.8438rem; color: var(--ink-500); line-height: var(--lh-relaxed); }
.ai-process-step--final p { color: var(--ink-700); }
.ai-process-arrow { flex: none; display: flex; align-items: center; color: var(--ink-200); }
.ai-process-arrow svg { width: 18px; height: 18px; }

/* =========================================================
   5d. EXPLORE MOSAIC — editorial bento grid, checkerboard of
   solid text tiles and abstract CSS-drawn visual tiles
   ========================================================= */
.ai-mosaic { padding-block: var(--section-pad-y); }
.ai-mosaic-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-rows: 240px;
  gap: var(--sp-3); margin-top: var(--sp-8);
}
.ai-mosaic-tile {
  position: relative; display: flex; flex-direction: column; justify-content: flex-end; gap: var(--sp-2);
  padding: var(--sp-5); border-radius: var(--radius-md); overflow: hidden;
  transition: transform var(--dur-base) var(--ease-out);
}
.ai-mosaic-tile:hover { transform: translateY(-3px); }

.ai-mosaic-tile--navy { background: var(--nasdan-navy); justify-content: center; }
.ai-mosaic-tile--navy .ai-mosaic-eyebrow { color: var(--nasdan-amber); }
.ai-mosaic-tile--navy h3 { color: var(--white); }
.ai-mosaic-tile--navy p { color: var(--paper-300); }
.ai-mosaic-tile--navy .ai-mosaic-link { color: var(--white); }

.ai-mosaic-tile--light { background: var(--white); border: 1px solid var(--ink-200); justify-content: center; }
.ai-mosaic-tile--light .ai-mosaic-eyebrow { color: var(--ink-400); }
.ai-mosaic-tile--light h3 { color: var(--ink-900); }
.ai-mosaic-tile--light p { color: var(--ink-500); }
.ai-mosaic-tile--light .ai-mosaic-link { color: var(--nasdan-navy); }

.ai-mosaic-tile--amber { background: var(--nasdan-amber-100); justify-content: center; }
.ai-mosaic-tile--amber .ai-mosaic-eyebrow { color: var(--nasdan-amber-700); }
.ai-mosaic-tile--amber h3 { color: var(--ink-900); }
.ai-mosaic-tile--amber p { color: var(--ink-700); }
.ai-mosaic-tile--amber .ai-mosaic-link { color: var(--nasdan-navy); }

.ai-mosaic-eyebrow { font-size: 0.75rem; font-weight: var(--fw-semibold); letter-spacing: var(--ls-wide); text-transform: uppercase; }
.ai-mosaic-tile h3 { font-size: 1.1875rem; font-weight: var(--fw-medium); line-height: var(--lh-snug); max-width: 22ch; }
.ai-mosaic-tile p { font-size: 0.875rem; line-height: var(--lh-relaxed); max-width: 32ch; }
.ai-mosaic-link { display: inline-flex; align-items: center; gap: 6px; font-size: 0.8125rem; font-weight: var(--fw-medium); margin-top: var(--sp-2); }
.ai-mosaic-link svg { width: 14px; height: 14px; transition: transform var(--dur-base) var(--ease-out); }
.ai-mosaic-tile:hover .ai-mosaic-link svg { transform: translateX(3px); }

/* --- abstract CSS-drawn visual tiles --- */
.ai-mosaic-tile--visual { background: var(--nasdan-navy-800); justify-content: flex-end; }
.ai-mosaic-visual-label {
  position: relative; z-index: 1; display: inline-block; font-size: 0.75rem; font-weight: var(--fw-medium);
  color: var(--white); background: rgba(11,22,63,0.6); backdrop-filter: blur(4px);
  padding: 0.4rem 0.8rem; border-radius: var(--radius-pill); align-self: flex-start;
}
.ai-mosaic-tile--mesh { background-image: radial-gradient(rgba(255,193,7,0.35) 1.5px, transparent 1.5px), radial-gradient(rgba(255,255,255,0.14) 1.5px, transparent 1.5px); background-size: 26px 26px, 26px 26px; background-position: 0 0, 13px 13px; background-color: var(--nasdan-navy-800); }
.ai-mosaic-tile--nodes { background-color: var(--nasdan-navy-600); background-image: linear-gradient(135deg, rgba(255,193,7,0.18) 0%, transparent 45%), radial-gradient(circle at 20% 30%, rgba(255,255,255,0.16) 0 3px, transparent 3px), radial-gradient(circle at 70% 60%, rgba(255,193,7,0.4) 0 3px, transparent 3px), radial-gradient(circle at 45% 80%, rgba(255,255,255,0.16) 0 3px, transparent 3px), radial-gradient(circle at 85% 20%, rgba(255,255,255,0.16) 0 3px, transparent 3px); }
.ai-mosaic-tile--grid { background-color: var(--nasdan-navy); background-image: linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px); background-size: 22px 22px; }

/* =========================================================
   5c. FAQ (shared pattern, established on custom-software.html)
   ========================================================= */
.ai-faq { padding-block: var(--section-pad-y); background: var(--cloud); }
.faq-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: var(--sp-9); align-items: start; }
.faq-head p a { color: var(--nasdan-navy); font-weight: var(--fw-medium); text-decoration: underline; text-underline-offset: 3px; }
.faq-list { display: flex; flex-direction: column; }
.faq-item { border-bottom: 1px solid var(--ink-200); }
.faq-item:first-child { border-top: 1px solid var(--ink-200); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); padding: var(--sp-5) 0; background: none; border: none; cursor: pointer; text-align: left; font-size: 1rem; font-weight: var(--fw-medium); color: var(--ink-900); }
.faq-icon { position: relative; flex: none; width: 20px; height: 20px; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; top: 50%; left: 50%; background: var(--ink-700); transform: translate(-50%, -50%); transition: transform var(--dur-base) var(--ease-out); }
.faq-icon::before { width: 12px; height: 1.6px; }
.faq-icon::after { width: 1.6px; height: 12px; }
.faq-item.is-open .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg) scale(0); }
.faq-item.is-open .faq-question { color: var(--nasdan-navy); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height var(--dur-slow) var(--ease-out); }
.faq-answer p { padding-bottom: var(--sp-5); margin: 0; color: var(--ink-500); line-height: var(--lh-relaxed); max-width: 60ch; }

/* =========================================================
   6. FINAL CTA — network graphic
   ========================================================= */
.ai-final-panel { position: relative; overflow: hidden; }
.ai-final-graphic { position: absolute; inset: 0; pointer-events: none; opacity: 0.6; }
.ai-final-graphic svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.ai-final-node { position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--nasdan-amber); box-shadow: 0 0 10px rgba(255,193,7,0.6); }
.ai-final-node.n1 { left: 10%; top: 50%; } .ai-final-node.n2 { left: 40%; top: 30%; }
.ai-final-node.n3 { left: 70%; top: 45%; } .ai-final-node.n4 { left: 90%; top: 25%; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1199.98px) {
  .ai-readiness-grid { grid-template-columns: 1fr; }

  .ai-build-head { grid-template-columns: 1fr; gap: var(--sp-4); }
  .ai-build-panel-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .ai-build-panel-copy h3 { max-width: none; }

  .ai-solutions-grid { grid-template-columns: 1fr 1fr; }
  .ai-process-rail { flex-wrap: wrap; }
  .ai-process-step { flex: 1 1 calc(33.333% - var(--sp-3)); min-width: 220px; }
  .ai-process-arrow { display: none; }
  .faq-grid { grid-template-columns: 1fr; gap: var(--sp-6); }

  .ai-mosaic-grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 220px; }
}

@media (max-width: 991.98px) {
  .ai-pipeline-track { justify-content: flex-start; }
}

@media (max-width: 767.98px) {
  .ai-hero { padding-block: var(--sp-8) var(--sp-6); }
  .ai-hero-headline { max-width: 100%; font-size: clamp(1.75rem, 1.5rem + 2.2vw, 2.25rem); }
  .ai-hero-actions { flex-direction: column; align-items: stretch; }
  .ai-hero-actions .btn-nasdan { white-space: normal; text-align: center; }
  .ai-pipe-icon { width: 76px; height: 76px; border-radius: 16px; }
  .ai-pipe-connector { width: 20px; margin-bottom: 24px; }

  .ai-build-tabs { overflow-x: auto; flex-wrap: nowrap; }
  .ai-build-tab { white-space: nowrap; }
  .ai-build-panel-list { grid-template-columns: 1fr; row-gap: var(--sp-4); }

  .ai-solutions-grid { grid-template-columns: 1fr; }
  .ai-inline-cta { flex-direction: column; align-items: stretch; text-align: center; }
  .ai-inline-cta .btn-link-nasdan { justify-content: center; }

  .ai-process-step { flex: 1 1 100%; }

  .ai-mosaic-grid { grid-template-columns: 1fr; grid-auto-rows: 200px; }
  .ai-mosaic-tile h3 { max-width: none; }
  .ai-mosaic-tile p { max-width: none; }
}

@media (max-width: 575.98px) {
  .ai-pipeline-track { gap: var(--sp-2); }
  .ai-pipe-icon { width: 64px; height: 64px; }
  .ai-pipe-label { font-size: 0.6875rem; }
  .ai-decision-check { width: 40px; height: 40px; }
  .ai-decision-check svg { width: 20px; height: 20px; }
}