:root {
  --ink: #123d5b;
  --muted: #5f7180;
  --line: rgba(28, 92, 126, 0.14);
  --blue: #1677a7;
  --teal: #31a8a0;
  --green: #7fb543;
  --lavender: #8a79be;
  --paper: #ffffff;
  --soft: #f7fbfd;
  --shadow: 0 18px 55px rgba(25, 87, 119, 0.09);
  --radius: 26px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
}
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
a:hover { color: #0a5f89; }
img { max-width: 100%; }

/* Landing page */
.landing-page { min-height: 100svh; overflow: hidden; }
.landing {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  isolation: isolate;
  background: #fff;
}
.landing-nav {
  position: absolute;
  z-index: 5;
  top: clamp(24px, 4vw, 54px);
  right: clamp(24px, 6vw, 88px);
  display: flex;
  gap: clamp(28px, 4vw, 56px);
  font-size: clamp(17px, 1.6vw, 22px);
  letter-spacing: 0.015em;
}
.landing-nav a,
.quiet-nav a {
  color: #1477a5;
  text-decoration: none;
  font-weight: 500;
  transition: transform 180ms ease, color 180ms ease;
}
.landing-nav a:hover,
.quiet-nav a:hover { color: #2b9c96; transform: translateY(-1px); }
.hero-logo {
  position: relative;
  z-index: 3;
  width: min(58vw, 560px);
  min-width: 280px;
  filter: drop-shadow(0 14px 34px rgba(30, 105, 138, 0.08));
  transform: translateY(-3vh);
}
.sun-glow {
  position: absolute;
  z-index: 0;
  width: min(58vw, 720px);
  height: min(58vw, 720px);
  left: -18vw;
  top: -28vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 223, 115, 0.19), rgba(217, 244, 237, 0.08) 45%, rgba(255,255,255,0) 72%);
  filter: blur(2px);
}
.landing-waves {
  position: absolute;
  z-index: 1;
  inset: auto 0 0;
  width: 100%;
  height: clamp(150px, 27vh, 310px);
  display: block;
}

/* Shared interior layout */
.site-header {
  max-width: 1220px;
  margin: 0 auto;
  padding: 30px clamp(22px, 5vw, 70px) 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}
.brand { display: inline-flex; width: 205px; text-decoration: none; }
.brand img { width: 100%; height: auto; display: block; }
.quiet-nav { display: flex; gap: clamp(25px, 4vw, 50px); font-size: 18px; }
.page-shell { max-width: 1140px; margin: 0 auto; padding: 48px clamp(22px, 5vw, 70px) 100px; }
.page-hero { max-width: 820px; margin-bottom: 48px; }
.eyebrow {
  margin: 0 0 9px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
h1, h2, h3 { margin-top: 0; line-height: 1.16; letter-spacing: -0.025em; }
h1 { font-size: clamp(42px, 7vw, 78px); font-weight: 520; margin-bottom: 20px; }
h2 { font-size: clamp(28px, 4vw, 43px); font-weight: 520; }
h3 { font-size: 22px; font-weight: 600; }
.lede { color: var(--muted); font-size: clamp(18px, 2vw, 22px); max-width: 760px; }
.section { margin-top: 72px; }
.section-heading { margin-bottom: 28px; }
.site-footer {
  max-width: 1140px;
  margin: 0 auto;
  padding: 26px clamp(22px, 5vw, 70px) 46px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px 30px;
  color: var(--muted);
  font-size: 14px;
}
.site-footer a { color: var(--muted); }

/* Learn hub */
.learn-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}
.learn-card,
.content-card,
.client-card,
.app-card,
.publication-card,
.rd-card {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.94);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.learn-card {
  min-height: 230px;
  padding: clamp(26px, 4vw, 42px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: var(--ink);
  overflow: hidden;
  position: relative;
}
.learn-card::after {
  content: "↗";
  position: absolute;
  right: 28px;
  top: 25px;
  color: rgba(22,119,167,0.42);
  font-size: 24px;
}
.learn-card:hover { transform: translateY(-3px); transition: transform 180ms ease; color: var(--ink); }
.learn-card p { color: var(--muted); margin: 0; max-width: 42ch; }
.learn-card h2 { font-size: 31px; margin-bottom: 20px; }
.learn-card.wide { grid-column: 1 / -1; }

/* About */
.about-layout { display: grid; grid-template-columns: minmax(230px, 0.72fr) minmax(0, 1.6fr); gap: clamp(34px, 7vw, 86px); align-items: start; }
.portrait-wrap { position: sticky; top: 28px; }
.portrait-wrap img { width: 100%; border-radius: 30px; box-shadow: var(--shadow); display: block; }
.about-copy p { margin: 0 0 26px; font-size: clamp(18px, 2vw, 21px); }

/* Case studies */
.client-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.client-card { padding: 30px; display: grid; grid-template-columns: 125px 1fr; gap: 26px; align-items: start; }
.logo-frame { min-height: 88px; display: grid; place-items: center; padding: 8px; }
.logo-frame img { max-width: 118px; max-height: 78px; object-fit: contain; }
.client-card p { margin: 0; color: #334f61; }
.client-card h3 { margin-bottom: 12px; }

/* Apps */
.app-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.app-card { padding: 30px; display: grid; grid-template-columns: 112px 1fr; gap: 26px; align-items: start; }
.app-icon { width: 104px; aspect-ratio: 1; border-radius: 23px; display: grid; place-items: center; overflow: hidden; background: var(--soft); }
.app-icon img { width: 100%; height: 100%; object-fit: contain; }
.app-card p { margin: 0; color: #334f61; }
.app-links { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 18px; font-size: 14px; }
.app-links a { text-decoration: none; font-weight: 600; }
.category-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.category-link { padding: 25px 27px; border-top: 1px solid var(--line); color: var(--ink); text-decoration: none; font-size: 21px; }
.category-link:hover { color: var(--blue); }

/* R&D / publications / connect */
.rd-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.rd-card { padding: 27px 30px; }
.rd-card h3 { margin-bottom: 9px; }
.rd-card p { margin: 0; color: var(--muted); }
.publication-list { display: grid; gap: 17px; }
.publication-card { padding: 25px 28px; }
.publication-card p { margin: 0; }
.publication-card .app-links { margin-top: 10px; }
.connect-panel { max-width: 850px; padding: clamp(32px, 6vw, 66px); border: 1px solid var(--line); border-radius: 34px; box-shadow: var(--shadow); }
.connect-email { display: inline-block; margin-top: 20px; font-size: clamp(23px, 4vw, 42px); letter-spacing: -0.02em; text-decoration: none; overflow-wrap: anywhere; }
.back-link { display: inline-block; margin-top: 36px; text-decoration: none; font-weight: 600; }

@media (max-width: 840px) {
  .learn-grid, .client-grid, .app-grid, .rd-grid, .category-list { grid-template-columns: 1fr; }
  .learn-card.wide { grid-column: auto; }
  .about-layout { grid-template-columns: 1fr; }
  .portrait-wrap { position: static; max-width: 370px; }
  .client-card, .app-card { grid-template-columns: 95px 1fr; }
  .logo-frame { min-height: 70px; }
  .logo-frame img { max-width: 88px; max-height: 65px; }
  .app-icon { width: 88px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .site-header { padding-top: 22px; }
  .brand { width: 155px; }
  .quiet-nav { font-size: 16px; gap: 22px; }
  .page-shell { padding-top: 34px; }
  .page-hero { margin-bottom: 36px; }
  .client-card, .app-card { grid-template-columns: 1fr; }
  .logo-frame { justify-content: start; place-items: start; min-height: auto; }
  .logo-frame img { max-width: 140px; max-height: 75px; }
  .app-icon { width: 96px; }
  .landing-nav { top: 24px; right: 24px; }
  .hero-logo { width: 76vw; }
  .site-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}


/* Visible primary navigation tabs */
.site-header {
  flex-wrap: wrap;
  padding-bottom: 24px;
}
.tab-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 7px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(247, 251, 253, 0.94);
  box-shadow: 0 10px 28px rgba(25, 87, 119, 0.07);
}
.site-header .tab-nav {
  margin-left: auto;
}
.tab-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}
.tab-nav a:hover {
  color: var(--blue);
  background: #fff;
  transform: translateY(-1px);
}
.tab-nav a.active {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 5px 13px rgba(22, 119, 167, 0.22);
}
.landing-tabs {
  position: absolute;
  z-index: 6;
  top: clamp(20px, 3vw, 40px);
  left: 50%;
  width: min(calc(100% - 36px), 980px);
  transform: translateX(-50%);
}
.landing-tabs a { font-size: clamp(13px, 1.15vw, 15px); }

@media (max-width: 960px) {
  .site-header {
    justify-content: center;
  }
  .site-header .brand { margin-right: auto; }
  .site-header .tab-nav {
    flex-basis: 100%;
    margin: 4px 0 0;
  }
}

@media (max-width: 640px) {
  .site-header { padding-left: 14px; padding-right: 14px; }
  .site-header .brand { margin: 0 auto 4px; }
  .tab-nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .tab-nav a { flex: 0 0 auto; font-size: 14px; padding: 8px 12px; }
  .landing-tabs {
    width: calc(100% - 22px);
    top: 12px;
  }
  .hero-logo { transform: translateY(3vh); }
}


/* Review refinements: featured leadership case studies and one-page app portfolio */
.client-grid.featured-stack > .client-card {
  grid-column: 1 / -1;
  grid-template-columns: 160px minmax(0, 1fr);
  padding: 36px;
}
.client-grid.featured-stack > .client-card .logo-frame {
  min-height: 105px;
}
.client-grid.featured-stack > .client-card .logo-frame img {
  max-width: 150px;
  max-height: 96px;
}
.app-category {
  scroll-margin-top: 24px;
}
.app-category + .app-category {
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.section-intro {
  max-width: 760px;
  margin: -8px 0 0;
  color: var(--muted);
  font-size: 18px;
}
.app-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}
.app-list .app-card {
  grid-template-columns: 120px minmax(0, 1fr);
  padding: 30px 34px;
}
.app-list .app-icon {
  width: 108px;
}

@media (max-width: 840px) {
  .client-grid.featured-stack > .client-card {
    grid-template-columns: 105px minmax(0, 1fr);
    padding: 30px;
  }
  .client-grid.featured-stack > .client-card .logo-frame img {
    max-width: 98px;
    max-height: 74px;
  }
  .app-list .app-card {
    grid-template-columns: 100px minmax(0, 1fr);
  }
  .app-list .app-icon { width: 92px; }
}

@media (max-width: 560px) {
  .client-grid.featured-stack > .client-card,
  .app-list .app-card {
    grid-template-columns: 1fr;
  }
  .client-grid.featured-stack > .client-card {
    padding: 27px;
  }
  .app-list .app-card { padding: 27px; }
  .app-list .app-icon { width: 96px; }
}


/* Ai4 preview: concise board-level founder positioning */
.profile-line {
  margin: -4px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.1vw, 23px);
  font-weight: 500;
  letter-spacing: 0.005em;
}
.profile-line span { padding: 0 0.28em; color: var(--teal); }
.profile-summary {
  max-width: 720px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}
.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 17px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--soft);
  color: var(--ink);
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}
.action-link:hover { transform: translateY(-1px); background: #fff; color: var(--blue); }
.action-link.primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
  box-shadow: 0 7px 18px rgba(22, 119, 167, 0.18);
}
.action-link.primary:hover { background: #0f6e9c; color: #fff; }
@media (max-width: 560px) {
  .profile-line { font-size: 18px; line-height: 1.5; }
  .about-actions { flex-direction: column; align-items: stretch; }
  .action-link { width: 100%; }
}


/* Board/advisor integrated revision */
.landing-brand {
  position: relative;
  z-index: 3;
  width: min(88vw, 920px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transform: translateY(-2vh);
}
.landing-brand .hero-logo {
  width: min(58vw, 560px);
  min-width: 280px;
  transform: none;
}
.landing-positioning {
  max-width: 860px;
  margin: 28px auto 0;
  color: #496678;
  font-size: clamp(16px, 1.8vw, 21px);
  line-height: 1.5;
  letter-spacing: -0.01em;
}
.profile-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em 0.65em;
  align-items: center;
  margin: -2px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 600;
}
.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.highlight-card {
  min-height: 152px;
  padding: 27px 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(145deg, #ffffff, #f7fbfd);
  box-shadow: 0 14px 38px rgba(25, 87, 119, 0.075);
}
.highlight-metric {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: clamp(25px, 3vw, 36px);
  font-weight: 650;
  line-height: 1.1;
  letter-spacing: -0.035em;
}
.highlight-label {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.45;
}
.board-featured-stack > .board-featured-card {
  border-left: 4px solid rgba(22, 119, 167, 0.58);
}
.board-featured-stack > .board-featured-card p {
  font-size: 17px;
  line-height: 1.65;
}
.supporting-grid .supporting-card {
  grid-template-columns: 100px minmax(0, 1fr);
  padding: 27px;
  box-shadow: 0 12px 34px rgba(25, 87, 119, 0.065);
}
.supporting-grid .supporting-card .logo-frame img {
  max-width: 94px;
  max-height: 65px;
}
.supporting-grid .supporting-card p {
  font-size: 15.5px;
  line-height: 1.58;
}
.publication-section:first-of-type { margin-top: 20px; }
@media (max-width: 860px) {
  .highlight-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .landing-brand { transform: translateY(4vh); }
  .landing-brand .hero-logo { width: 76vw; }
  .landing-positioning { margin-top: 20px; font-size: 16px; }
  .highlight-grid { grid-template-columns: 1fr; }
  .highlight-card { min-height: auto; }
  .supporting-grid .supporting-card { grid-template-columns: 1fr; }
}

/* Technical, accessibility, and credibility cleanup */
.skip-link {
  position: fixed;
  z-index: 1000;
  left: 16px;
  top: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); }
a:focus-visible {
  outline: 3px solid rgba(22, 119, 167, 0.48);
  outline-offset: 4px;
  border-radius: 6px;
}
.innovation-grid .rd-card { padding: 30px; }
.innovation-grid .rd-card > p { margin-bottom: 16px; }
.innovation-list {
  margin: 0;
  padding-left: 1.2em;
  color: #334f61;
}
.innovation-list li + li { margin-top: 12px; }
.publication-card h3 { margin-bottom: 10px; }
.publication-card cite { font-style: italic; }
.connect-panel h1 { font-size: clamp(38px, 6vw, 66px); max-width: 760px; }
.contact-actions { margin-top: 30px; }
.redirect-page { max-width: 760px; padding-top: 90px; }

@media print {
  .skip-link { display: none !important; }
  .client-card, .highlight-card, .rd-card, .publication-card { break-inside: avoid; }
}