/* TriAxis Global - Website v3 stylesheet
   Tokens and conventions from Stage 5 build specification (18 April 2026)
   + Build specification addendum (26 May 2026)
   Fonts: Inter (sans), Source Serif 4 (pull statements only, used sparingly) */

:root {
  --color-brand-navy: #1F2A44;
  --color-brand-slate: #334155;
  --color-brand-slate-light: #64748B;
  --color-surface: #FFFFFF;
  --color-surface-muted: #F8FAFC;
  --color-surface-deep: #0F172A;
  --color-line: #CBD5E1;
  --color-accent: #0E7490;
  --color-focus: #0E7490;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;
  --space-9: 128px;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.06), 0 2px 8px rgba(15, 23, 42, 0.04);

  --motion-duration-fast: 120ms;
  --motion-duration-base: 200ms;
  --motion-easing: cubic-bezier(0.2, 0.6, 0.2, 1);

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Source Serif 4", Georgia, serif;

  --grid-max-width: 1200px;
  --grid-gutter: 24px;
  --measure-body: 68ch;
  --measure-content: 720px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-brand-slate);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  color: var(--color-brand-navy);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-3);
}
h1 { font-size: 40px; line-height: 1.15; }
h2 { font-size: 28px; line-height: 1.2; margin-top: var(--space-6); }
h3 { font-size: 22px; line-height: 1.3; margin-top: var(--space-4); }
h4 { font-size: 16px; line-height: 1.4; }

p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure-body);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--motion-duration-fast) var(--motion-easing);
}
a:hover { border-bottom-color: var(--color-accent); }

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-brand-slate-light);
  margin: 0 0 var(--space-2);
  display: block;
}

.lead {
  font-size: 20px;
  line-height: 1.55;
  color: var(--color-brand-slate);
  max-width: var(--measure-body);
  margin: 0 0 var(--space-4);
}

.small {
  font-size: 14px;
  line-height: 1.55;
  color: var(--color-brand-slate-light);
}

.container {
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--grid-gutter);
}

/* Wider screens: increase outer gutter so content doesn't hug the page edge */
@media (min-width: 1024px) {
  .container { padding: 0 var(--space-6); }
}
@media (min-width: 1440px) {
  .container { padding: 0 var(--space-7); }
}

/* Centre narrow text blocks (720px) inside the wider container (1200px) */
.content {
  max-width: var(--measure-content);
  margin-left: auto;
  margin-right: auto;
}

/* Section heads sit at the left of the wider container, but headings and leads
   are constrained so they wrap deliberately rather than sprawl. */
.section-head h2 { max-width: 24ch; }
.section-head .lead { max-width: 64ch; }

/* Skip to content */
.skip-link {
  position: absolute;
  top: -40px;
  left: var(--space-3);
  background: var(--color-brand-navy);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  z-index: 100;
}
.skip-link:focus { top: var(--space-3); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: saturate(180%) blur(6px);
  -webkit-backdrop-filter: saturate(180%) blur(6px);
  border-bottom: 1px solid var(--color-line);
  z-index: 50;
  transition: padding var(--motion-duration-base) var(--motion-easing);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}
.site-header.is-compact .container { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.site-header.is-compact .brand img { height: 28px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-brand-navy);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 18px;
  border: none;
  transition: gap var(--motion-duration-base) var(--motion-easing);
}
.brand:hover { border: none; }
.brand img {
  height: 36px;
  width: auto;
  display: block;
  transition: height var(--motion-duration-base) var(--motion-easing);
}
.brand-text { display: inline-flex; flex-direction: column; line-height: 1.1; }
.brand-text .brand-name { font-weight: 600; }
.brand-text .brand-sub {
  color: var(--color-brand-slate-light);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}

.primary-nav { display: flex; gap: var(--space-5); align-items: center; }
.primary-nav a {
  color: var(--color-brand-slate);
  border: none;
  font-size: 15px;
  font-weight: 500;
  padding: var(--space-2) 0;
}
.primary-nav a:hover { color: var(--color-brand-navy); border: none; }
.primary-nav a.is-current { color: var(--color-brand-navy); font-weight: 600; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid var(--color-brand-navy);
  background: var(--color-brand-navy);
  color: #fff;
  cursor: pointer;
  transition: background var(--motion-duration-base) var(--motion-easing),
              color var(--motion-duration-base) var(--motion-easing);
}
.btn:hover { background: transparent; color: var(--color-brand-navy); border-color: var(--color-brand-navy); }
.btn.ghost { background: transparent; color: var(--color-brand-navy); }
.btn.ghost:hover { background: var(--color-brand-navy); color: #fff; }

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  font-family: inherit;
  font-size: 14px;
  color: var(--color-brand-navy);
  cursor: pointer;
}

/* Breadcrumbs (per 26 May 2026 addendum) */
.breadcrumbs {
  padding: var(--space-4) 0 0;
  font-size: 13px;
  color: var(--color-brand-slate-light);
}
.breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: var(--space-2); }
.breadcrumbs li + li::before {
  content: "›";
  color: var(--color-brand-slate-light);
  padding: 0 var(--space-1);
}
.breadcrumbs a {
  color: var(--color-brand-slate-light);
  border-bottom: none;
}
.breadcrumbs a:hover { color: var(--color-brand-navy); border-bottom: 1px solid var(--color-brand-navy); }
.breadcrumbs [aria-current="page"] { color: var(--color-brand-slate); }

/* Hero */
.hero {
  background: var(--color-surface-deep);
  color: #fff;
  padding: var(--space-8) 0 var(--space-7);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 85% 30%, rgba(14, 116, 144, 0.15), transparent 50%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero .label { color: rgba(255, 255, 255, 0.6); }
.hero h1 {
  color: #fff;
  font-size: 56px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 18ch;
  margin-bottom: var(--space-4);
}
.hero .hero-subline {
  font-family: var(--font-serif);
  font-size: 22px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.92);
  max-width: 30ch;
  margin: 0 0 var(--space-4);
  font-weight: 400;
}
.hero .lead { color: rgba(255, 255, 255, 0.82); max-width: 60ch; }
.hero .actions { margin-top: var(--space-5); display: flex; gap: var(--space-3); flex-wrap: wrap; }
.hero .btn { background: #fff; color: var(--color-brand-navy); border-color: #fff; }
.hero .btn:hover { background: transparent; color: #fff; border-color: #fff; }
.hero .btn.ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.5); }
.hero .btn.ghost:hover { background: #fff; color: var(--color-brand-navy); border-color: #fff; }

/* Page header (non-hero) */
.page-header { padding: var(--space-6) 0 var(--space-5); }
.page-header h1 { max-width: 20ch; }
.page-header .lead { max-width: 66ch; }

/* Section */
section { padding: var(--space-6) 0; }
section.muted { background: var(--color-surface-muted); }
section.narrow { padding: var(--space-5) 0; }
.section-head { margin-bottom: var(--space-5); }

/* Cards grid */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
}
.card h3 { margin-top: 0; font-size: 20px; }
.card p { font-size: 16px; }
.card .card-link {
  margin-top: auto;
  padding-top: var(--space-3);
  display: inline-block;
  font-weight: 500;
  align-self: flex-start;
}

/* Leadership list */
.leader {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-5);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-line);
  scroll-margin-top: var(--space-7);
}
.leader:first-of-type { border-top: 0; padding-top: 0; }
.leader-photo {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-md);
  background: var(--color-surface-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brand-slate-light);
  font-size: 13px;
  text-align: center;
  padding: var(--space-3);
  overflow: hidden;
}
.leader-photo:has(img) { padding: 0; }
.leader-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.leader-body h3 { margin-top: 0; }
.leader-role { color: var(--color-brand-slate-light); font-style: italic; margin: 0 0 var(--space-3); }

/* Leadership strip (compact thumbnails on homepage) */
.leader-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.leader-strip + .leader-strip {
  grid-template-columns: repeat(3, 1fr);
  max-width: 75%;
  margin-bottom: 0;
}
.leader-strip a {
  display: block;
  color: inherit;
  border-bottom: none;
  text-align: center;
}
.leader-strip a:hover { border-bottom: none; }
.leader-strip .leader-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  height: auto;
  margin-bottom: var(--space-3);
}
.leader-strip .leader-name {
  display: block;
  font-weight: 600;
  color: var(--color-brand-navy);
  font-size: 15px;
}
.leader-strip .leader-role-small {
  display: block;
  color: var(--color-brand-slate-light);
  font-size: 13px;
  margin-top: 2px;
}

/* Capability detail list */
.capability {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-line);
}
.capability:first-of-type { border-top: 0; padding-top: 0; }
.capability h3 { margin-top: 0; }

/* Flagship offer panel */
.flagship {
  background: var(--color-brand-navy);
  color: rgba(255, 255, 255, 0.92);
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-lg);
  margin: var(--space-5) 0;
}
.flagship .label { color: rgba(255, 255, 255, 0.6); }
.flagship h3 { color: #fff; margin-top: 0; }
.flagship p { color: rgba(255, 255, 255, 0.85); }
.flagship .btn { background: #fff; color: var(--color-brand-navy); border-color: #fff; margin-top: var(--space-3); }
.flagship .btn:hover { background: transparent; color: #fff; }

/* Contact panel */
.contact-panel { background: var(--color-surface-muted); padding: var(--space-6) 0; }
.contact-panel h2 { margin-top: 0; }
.contact-panel p { max-width: 60ch; margin-bottom: var(--space-4); }

/* Pull statement */
.pull {
  font-family: var(--font-serif);
  font-size: 28px;
  line-height: 1.35;
  color: var(--color-brand-navy);
  max-width: 30ch;
  font-weight: 400;
  margin: var(--space-6) 0;
}

/* Draft banner */
.draft-banner {
  background: #FEF3C7;
  border-top: 1px solid #F59E0B;
  border-bottom: 1px solid #F59E0B;
  color: #92400E;
  padding: var(--space-3) 0;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
}

/* Footer */
.site-footer {
  background: var(--color-surface-deep);
  color: rgba(255, 255, 255, 0.82);
  padding: var(--space-7) 0 var(--space-5);
  font-size: 14px;
}
.site-footer h3 {
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  margin: 0 0 var(--space-3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-5);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-grid a {
  color: rgba(255, 255, 255, 0.82);
  border: none;
  display: block;
  padding: 4px 0;
}
.footer-grid a:hover { color: #fff; border: none; }
.site-footer .footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.site-footer .footer-brand img { height: 32px; width: auto; }
.site-footer .footer-brand .brand-name { color: #fff; font-weight: 600; font-size: 16px; }
.site-footer .acknowledgment {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.66);
  max-width: 52ch;
  margin: 0 0 var(--space-3);
}
.site-footer .meta {
  margin-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  gap: var(--space-5);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  flex-wrap: wrap;
}

/* Form */
.form { display: grid; gap: var(--space-4); max-width: 640px; }
.form label { display: block; font-weight: 500; color: var(--color-brand-navy); margin-bottom: var(--space-2); }
.form input,
.form select,
.form textarea {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: var(--color-brand-slate);
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}
.form input:focus,
.form select:focus,
.form textarea:focus {
  border-color: var(--color-accent);
  outline: 2px solid var(--color-focus);
  outline-offset: 1px;
}
.form textarea { min-height: 160px; resize: vertical; }
.form .required { color: var(--color-brand-slate-light); font-size: 13px; font-weight: 400; }
.form .field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

/* Sectors overview tiles */
.sector-tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.sector-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--motion-duration-base) var(--motion-easing),
              transform var(--motion-duration-base) var(--motion-easing);
  color: inherit;
  border-bottom: 1px solid var(--color-line);
}
.sector-tile:hover { border-color: var(--color-brand-navy); transform: translateY(-2px); }
.sector-tile h3 { margin: 0 0 var(--space-2); }
.sector-tile p { font-size: 16px; margin: 0 0 var(--space-3); }
.sector-tile .more { font-weight: 500; color: var(--color-accent); }

/* Definition list utility */
.defs {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-3) var(--space-5);
  margin: var(--space-4) 0;
}
.defs dt { font-weight: 500; color: var(--color-brand-navy); }
.defs dd { margin: 0; color: var(--color-brand-slate); }

/* Utility */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.muted-text { color: var(--color-brand-slate-light); }
.cta-row { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-5); }

/* Tablet */
@media (max-width: 960px) {
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  .hero h1 { font-size: 40px; }
  .hero { padding: var(--space-8) 0 var(--space-7); }
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .leader { grid-template-columns: 120px 1fr; }
  .leader-photo { width: 120px; height: 120px; }
  .leader-strip { grid-template-columns: repeat(2, 1fr); }
  .leader-strip + .leader-strip { grid-template-columns: repeat(2, 1fr); max-width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .sector-tiles { grid-template-columns: 1fr; }
  .form .field-row { grid-template-columns: 1fr; }
  .defs { grid-template-columns: 1fr; gap: var(--space-1) 0; }
  .defs dt { margin-top: var(--space-2); }
}

/* Mobile */
@media (max-width: 640px) {
  .primary-nav { display: none; }
  .primary-nav.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: var(--space-3) var(--grid-gutter);
    border-bottom: 1px solid var(--color-line);
  }
  .primary-nav.is-open a {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-line);
  }
  .primary-nav.is-open a:last-child { border-bottom: 0; }
  .menu-toggle { display: inline-flex; }
  .hero h1 { font-size: 32px; }
  .hero { padding: var(--space-7) 0 var(--space-6); }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .leader { grid-template-columns: 1fr; }
  .leader-photo { width: 120px; height: 120px; }
  .leader-strip { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .brand-text .brand-sub { display: none; }
  .breadcrumbs ol { font-size: 12px; }
}

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