/* AliHub Insights
   Layout concept: a reference-architecture stack. Tracks are drawn as layers;
   Identity & Security is the cross-cutting pillar beside them. */
:root {
  --bg: #F4F6F9;
  --surface: #FFFFFF;
  --ink: #0B1B33;
  --muted: #3A4659;
  --subtle: #556175;
  --line: #D9DFE7;
  --accent: #1D4ED8;
  --accent-soft: #E7EDFC;
  --on-accent: #FFFFFF;
  --live: #047857;
  --live-soft: #E1F2EA;
  --band: #0B1B33;
  --band-ink: #F4F6F9;
  --band-muted: #B9C3D3;
  /* Carousel cover thumbnails keep their printed colours in both themes */
  --cover-paper: #F4F6F9;
  --cover-ink: #0B1B33;
  --cover-subtle: #556175;
  --cover-dt: #1D4ED8;
  --cover-ls: #047857;
  --cover-tile-ink: #FFFFFF;
  --font-display: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 18px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0A1120;
    --surface: #111A2C;
    --ink: #E8EDF5;
    --muted: #B7C1D1;
    --subtle: #8E9BB0;
    --line: #25314A;
    --accent: #8AA9FF;
    --accent-soft: #17244A;
    --on-accent: #0A1120;
    --live: #4CC9A0;
    --live-soft: #12322A;
    --band: #111A2C;
    --band-ink: #E8EDF5;
    --band-muted: #A9B4C6;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0A1120;
  --surface: #111A2C;
  --ink: #E8EDF5;
  --muted: #B7C1D1;
  --subtle: #8E9BB0;
  --line: #25314A;
  --accent: #8AA9FF;
  --accent-soft: #17244A;
  --on-accent: #0A1120;
  --live: #4CC9A0;
  --live-soft: #12322A;
  --band: #111A2C;
  --band-ink: #E8EDF5;
  --band-muted: #A9B4C6;
  color-scheme: dark;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
}
img { max-width: 100%; }
a { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
p { margin: 0; }

.wrap {
  max-width: 1120px;
  margin-inline: auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--subtle);
}

.skip { position: absolute; left: -9999px; top: 0; }
.skip:focus {
  left: max(16px, env(safe-area-inset-left, 0px));
  top: 12px;
  z-index: 10;
  background: var(--surface);
  color: var(--ink);
  padding: 10px 16px;
  border-radius: 10px;
}

/* ---------- Header & footer ---------- */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.header-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  padding-block: 14px;
}
.wordmark {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--subtle);
  text-decoration: none;
  padding-block: 8px;
}
.wordmark span { font-weight: 800; color: var(--ink); }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 24px; }
.site-nav a {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding-block: 10px;
}
.site-nav a:hover { color: var(--ink); }

.site-footer { border-top: 1px solid var(--line); }
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 28px;
  color: var(--subtle);
  font-size: 0.9rem;
}

/* ---------- Shared blocks ---------- */
.hero { padding-block: 72px 48px; }
.hero h1 {
  margin-top: 18px;
  max-width: 15ch;
  font-size: clamp(2.3rem, 5.4vw, 4.1rem);
  font-weight: 800;
  letter-spacing: -0.035em;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.lead { margin-top: 22px; max-width: 60ch; font-size: 1.15rem; color: var(--muted); }

.section { padding-block: 48px; }
.section-tight { padding-block: 8px 56px; }
.section-head { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; }
.section-head p { max-width: 62ch; color: var(--muted); }
.list-title { margin-bottom: 18px; font-size: 1.4rem; font-weight: 800; }

.chip {
  align-self: flex-start;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 6px 14px;
}
.meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--subtle);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 6px 12px;
}
.status.live { background: var(--live-soft); color: var(--live); }
.status.live::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.status.soon { border: 1px solid var(--line); color: var(--subtle); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}
.btn.primary { background: var(--accent); color: var(--on-accent); }
.btn.ghost { border: 1px solid var(--line); color: var(--ink); background: var(--surface); }
.btn.light { background: var(--band-ink); color: var(--band); }

/* ---------- Featured insight card ---------- */
.feature {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  align-items: center;
  gap: 40px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease;
}
.feature:hover { border-color: var(--accent); }
.feature:hover .feature-cta { text-decoration: underline; }
.feature.compact { grid-template-columns: minmax(0, 170px) minmax(0, 1fr); gap: 28px; padding: 22px; }
.feature-body { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.feature-body h3 { font-size: clamp(1.45rem, 2.6vw, 2rem); font-weight: 800; }
.feature.compact h3 { font-size: clamp(1.25rem, 2.2vw, 1.55rem); }
.feature-body p { color: var(--muted); max-width: 58ch; }
.feature-cta { font-weight: 700; color: var(--accent); }

/* Carousel cover thumbnail, drawn in CSS so it scales with its card */
.cover {
  container-type: inline-size;
  width: 100%;
  max-width: 100%;
  aspect-ratio: 4 / 5;
  display: flex;
  flex-direction: column;
  gap: 5cqi;
  padding: 7cqi;
  background: var(--cover-paper);
  color: var(--cover-ink);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.cover-title {
  display: flex;
  flex-direction: column;
  gap: 1.4cqi;
  font-family: var(--font-display);
  font-size: 6.2cqi;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.cover-title .c-dt { color: var(--cover-dt); }
.cover-title .c-ls { color: var(--cover-ls); }
.cover-title .c-vs { font-size: 3.4cqi; font-weight: 700; color: var(--cover-subtle); }
.cover-tiles { flex: 1; min-height: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 3cqi; }
.tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 5cqi 4.5cqi;
  border-radius: 4cqi;
  color: var(--cover-tile-ink);
  font-family: var(--font-display);
  font-size: 4.6cqi;
  font-weight: 800;
  line-height: 1.05;
}
.tile.dt { background: var(--cover-dt); }
.tile.ls { background: var(--cover-ls); }
.tile svg { width: 14cqi; height: 14cqi; fill: var(--cover-tile-ink); }

/* ---------- Tracks as an architecture stack ---------- */
.stack { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 250px); gap: 12px; }
.layers { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.layer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px 24px;
  padding: 24px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease;
}
.layer:hover { border-color: var(--accent); }
.layer-text { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.layer h3 { font-size: 1.35rem; font-weight: 800; }
.layer-text p { color: var(--muted); font-size: 0.98rem; }
.layer.pillar {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  background: var(--accent-soft);
}

/* ---------- About band ---------- */
.about { background: var(--band); color: var(--band-ink); }
.about .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 24px 56px;
  padding-block: 64px;
}
.about .eyebrow { color: var(--band-muted); }
.about h2 { margin-top: 12px; font-size: clamp(1.8rem, 3.4vw, 2.6rem); font-weight: 800; }
.about-body { display: flex; flex-direction: column; gap: 16px; align-items: flex-start; }
.about-body p { max-width: 62ch; color: var(--band-muted); }

/* ---------- Track & insight pages ---------- */
.page-head { padding-block: 40px 40px; }
.back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-block: 10px;
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
}
.back:hover { color: var(--ink); }
.page-head .eyebrow { margin-top: 18px; }
.page-head h1 { margin-top: 12px; max-width: 22ch; font-size: clamp(2rem, 4.4vw, 3.2rem); font-weight: 800; letter-spacing: -0.03em; }

.topics { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 0; padding: 0; list-style: none; }
.topics li {
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
}

.empty {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 36px 32px;
  background: var(--surface);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}
.empty h3 { font-size: 1.3rem; font-weight: 800; }
.empty p { color: var(--muted); max-width: 56ch; }

.pdf-frame {
  display: block;
  width: 100%;
  height: min(80vh, 900px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.pdf-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }

.two-col { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 48px; }
.takeaways { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.takeaways li {
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.45;
}
.outline { margin: 0; padding: 0; list-style: none; counter-reset: page; }
.outline li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding-block: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.outline li::before {
  counter-increment: page;
  content: counter(page, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--subtle);
  padding-top: 2px;
}
.outline strong { color: var(--ink); }

/* ---------- Responsive ---------- */
@media (max-width: 780px) {
  .feature, .feature.compact { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .feature .cover { max-width: 300px; }
  .stack { grid-template-columns: minmax(0, 1fr); }
  .about .wrap { grid-template-columns: minmax(0, 1fr); }
  .two-col { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .pdf-frame { display: none; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .hero { padding-block: 48px 32px; }
  .layer { grid-template-columns: minmax(0, 1fr); padding: 22px; }
  .feature { padding: 20px; }
  .empty { padding: 28px 22px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}