/* ============================================================
   Governance Intelligence — site components
   Built on tokens.css + base.css, matching the Claude Design
   handoff's ui_kits/website/styles.css patterns exactly.
   ============================================================ */

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--space-6); }
.container--narrow { max-width: var(--container-tight); }
.container--wide { max-width: var(--container-wide); }

img { max-width: 100%; display: block; }

/* ---- Header ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line-1);
}

.site-header__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.site-logo img { height: 28px; width: auto; }

.site-logo__wordmark {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--weight-medium);
  letter-spacing: -0.005em;
  color: var(--fg-1);
}

.nav-toggle {
  display: none;
  background: var(--white);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--fg-1);
  padding: var(--space-2) var(--space-3);
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--fg-2);
  padding: var(--space-2) 0;
  position: relative;
}

.site-nav a:hover { color: var(--fg-1); text-decoration: none; }

.site-nav a[aria-current="page"] { color: var(--fg-1); }
.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--accent);
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .site-nav { display: none; width: 100%; }
  .site-nav.is-open { display: block; }
  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    border-top: 1px solid var(--line-1);
    margin-top: var(--space-3);
    padding: var(--space-3) 0;
  }
  .site-nav a { padding: var(--space-2) 0; display: block; width: 100%; }
}

/* ---- Hero ---- */

.hero { padding: var(--space-20) 0 var(--space-16); }

.hero__title {
  font-family: var(--font-sans);
  font-weight: var(--weight-light);
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--fg-1);
  max-width: 16ch;
  margin: 0 0 var(--space-6);
}

.hero__title em {
  color: var(--accent);
  font-style: normal;
  font-weight: var(--weight-regular);
}

.hero .eyebrow { display: inline-block; margin-bottom: var(--space-5); }

.hero__lead {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--fg-2);
  max-width: 62ch;
  margin: 0 0 var(--space-8);
}

.hero-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ---- Sections ---- */

.section { padding: var(--space-16) 0; }
.section--alt { background: var(--bg-sunken); }
.section--tint { background: var(--bg-tint); }
.section--dark { background: var(--brand-slate-900); color: var(--white); }
.section--dark h2, .section--dark h3 { color: var(--white); }
.section--dark .eyebrow { color: var(--brand-teal-300); }
.section--dark p { color: rgba(255, 255, 255, 0.72); }

.section__head { max-width: 68ch; margin-bottom: var(--space-10); }
.section-intro { max-width: 68ch; color: var(--fg-2); font-size: var(--text-lg); }

/* ---- Buttons ---- */

.button, .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-weight: var(--weight-medium);
  font-size: var(--text-sm);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--duration-2) var(--ease-standard),
              border-color var(--duration-2) var(--ease-standard),
              color var(--duration-2) var(--ease-standard);
}

.button--primary {
  background: var(--brand-teal);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}
.button--primary:hover { background: var(--brand-teal-700); color: var(--white); text-decoration: none; }

.button--secondary {
  background: var(--white);
  color: var(--brand-slate-900);
  border-color: var(--line-2);
}
.button--secondary:hover { background: var(--brand-slate-25); text-decoration: none; }

.button--ghost {
  background: transparent;
  color: var(--fg-2);
}
.button--ghost:hover { background: var(--brand-slate-50); text-decoration: none; }

.button--dark {
  background: var(--brand-slate-900);
  color: var(--white);
}
.button--dark:hover { background: #1c2226; text-decoration: none; }

.button--lg { padding: 12px 22px; font-size: var(--text-md); }

.button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Cards ---- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
  margin: var(--space-8) 0;
}

.book-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin: var(--space-8) 0;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--bg-raised);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  transition: box-shadow var(--duration-2) var(--ease-standard);
}

.card:hover { box-shadow: var(--shadow-md); }

.card h3 { margin-top: 0; font-size: var(--text-lg); }

.card > .button:last-child { align-self: flex-start; margin-top: auto; }

.card--emphasis {
  border-color: var(--brand-teal-100);
  box-shadow: 0 0 0 1px var(--brand-teal-100), var(--shadow-sm);
}

.card__eyebrow {
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--brand-teal);
  font-weight: var(--weight-medium);
  margin-bottom: var(--space-2);
}

/* ---- Domain / icon grid (five domains + governance + data layer) ---- */

.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-5);
  margin: var(--space-8) 0;
}

.domain-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--bg-raised);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: box-shadow var(--duration-2) var(--ease-standard),
              transform var(--duration-2) var(--ease-standard);
}

a.domain-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.domain-card--hub {
  background: var(--brand-slate-900);
  border-color: var(--brand-slate-900);
}
.domain-card--hub .domain-card__title,
.domain-card--hub .domain-card__body { color: var(--white); }
.domain-card--hub .domain-card__body { color: rgba(255, 255, 255, 0.7); }
.domain-card--hub .domain-card__more { color: var(--brand-teal-300); }

.domain-card__icon { width: 32px; height: 32px; color: var(--accent); align-self: center; }
.domain-card--hub .domain-card__icon { color: var(--brand-teal-300); }
.domain-card__icon img, .domain-card__icon svg { width: 100%; height: 100%; }

.domain-card__title { font-size: var(--text-md); font-weight: var(--weight-medium); color: var(--fg-1); margin: 0; text-align: center; }
.domain-card__body { font-size: var(--text-sm); line-height: 1.55; color: var(--fg-2); margin: 0; }

.domain-card__more {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--brand-teal);
  margin-top: auto;
  padding-top: var(--space-2);
}

/* ---- Tiered layout: five domains, governance hub, data-layer foundation ---- */

.domain-grid--tiered {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}

.domain-tier--domains {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-5);
}

.domain-tier--governance,
.domain-tier--authority,
.domain-tier--foundation {
  display: flex;
  justify-content: center;
  position: relative;
  padding-top: var(--space-8);
}

.domain-tier--governance::before,
.domain-tier--authority::before,
.domain-tier--foundation::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: var(--space-8);
  background: var(--line-strong);
  transform: translateX(-50%);
}

/* Match the foundation card's width to the diagram above it, so the
   connector line lands in a container of the same scale instead of
   a narrower card opening into a wider one. */
.domain-tier--foundation {
  max-width: 880px;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
}

.domain-card--banner {
  flex-direction: row;
  align-items: center;
  gap: var(--space-5);
  width: 100%;
}

.domain-card--banner .domain-card__text {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

.domain-card__heading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}
.domain-card__heading .domain-card__icon { flex-shrink: 0; }

.domain-card--banner .domain-card__title { font-size: var(--text-lg); }
.domain-card--banner .domain-card__more { flex-shrink: 0; margin-top: 0; padding-top: 0; }

.domain-card--foundation {
  background: var(--bg-sunken);
  border-color: var(--line-2);
}
.domain-card--foundation .domain-card__icon { color: var(--fg-3); }

@media (max-width: 640px) {
  .domain-card--banner {
    flex-direction: column;
    align-items: flex-start;
  }
  .domain-card--banner .domain-card__more { padding-top: var(--space-2); }
}

/* ---- Radial hub diagram: desktop visual, card grid fallback below 880px ---- */

.hub-diagram-fallback { display: flex; flex-direction: column; gap: var(--space-5); }
.hub-diagram { display: none; }

@media (min-width: 880px) {
  .hub-diagram-fallback { display: none; }
  .hub-diagram { display: block; }
}

.hub-diagram {
  position: relative;
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  aspect-ratio: 16 / 12;
  background: var(--brand-slate-900);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hub-diagram__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hub-diagram__line {
  stroke: var(--brand-teal-300);
  stroke-opacity: 0.3;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.hub-node {
  position: absolute;
  left: var(--x);
  top: var(--y);
  /* Icon centre stays pinned to (--x, --y) regardless of how much label/caption
     text follows below it — offset is half the icon's own height, not the
     whole node's, so the SVG spoke lines (drawn to the raw coordinate) always
     meet the icon rather than drifting as captions wrap to more lines. */
  transform: translate(-50%, -26px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  width: 148px;
  text-align: center;
  text-decoration: none;
}

.hub-node__icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--brand-slate-900);
  border: 1px solid var(--brand-teal-300);
  transition: box-shadow var(--duration-2) var(--ease-standard),
              transform var(--duration-2) var(--ease-standard);
}
.hub-node__icon img { width: 22px; height: 22px; }

.hub-node:hover .hub-node__icon,
.hub-node:focus-visible .hub-node__icon {
  box-shadow: 0 0 20px rgba(108, 200, 190, 0.55);
  transform: translateY(-2px);
}

.hub-node__label {
  color: var(--white);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  line-height: var(--leading-snug);
  margin-top: var(--space-1);
}

.hub-node__caption {
  color: var(--brand-slate-300);
  font-size: var(--text-2xs);
  line-height: var(--leading-snug);
}

.hub-node--hub .hub-node__label { color: var(--brand-teal-300); }

.hub-node--intelligence {
  transform: translate(-50%, -44px);
}
.hub-node--intelligence .hub-node__icon {
  width: 88px;
  height: 88px;
  box-shadow: 0 0 32px rgba(108, 200, 190, 0.35);
}
.hub-node--intelligence .hub-node__icon img { width: 34px; height: 34px; }
.hub-node--intelligence .hub-node__label { font-size: var(--text-sm); font-weight: var(--weight-semibold); }
.hub-node--intelligence .hub-node__caption { color: var(--brand-teal-100); }
.hub-node--intelligence:hover .hub-node__icon,
.hub-node--intelligence:focus-visible .hub-node__icon {
  box-shadow: 0 0 40px rgba(108, 200, 190, 0.6);
}

/* ---- Component prev/next strip ---- */

.component-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--line-1);
}

.component-nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--fg-2);
  max-width: 40ch;
}
.component-nav__link:hover { color: var(--brand-teal); }

.component-nav__link--next { text-align: right; margin-left: auto; }

.component-nav__label {
  display: block;
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: var(--space-1);
}

.component-nav__overview {
  font-size: var(--text-sm);
  color: var(--fg-2);
  text-align: center;
  flex-basis: 100%;
  order: 3;
}

/* ---- Model illustration block ---- */

.model-block {
  background: var(--bg-raised);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin: var(--space-8) 0;
}

.model-block img { width: 100%; height: auto; }

/* ---- Key concepts: jump nav + grouped entries ---- */

.concepts-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
}

.concepts-nav__group h6 {
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--brand-teal-700);
  margin: 0 0 var(--space-3);
}

.concepts-nav__group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.concepts-nav__group a {
  font-size: var(--text-sm);
  color: var(--fg-2);
}
.concepts-nav__group a:hover { color: var(--brand-teal-700); }

.concept-group { margin-bottom: var(--space-12); }
.concept-group:last-child { margin-bottom: 0; }

.concept-group__head { margin-bottom: var(--space-8); }

.concept {
  scroll-margin-top: 96px;
  padding-top: var(--space-8);
  border-top: 1px solid var(--line-1);
}
.concept:first-child { padding-top: 0; border-top: none; }

.concept + .concept { margin-top: var(--space-8); }

.concept h3 { margin-bottom: var(--space-2); }

.concept-group__back {
  display: inline-block;
  margin-top: var(--space-8);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--fg-3);
}
.concept-group__back:hover { color: var(--brand-teal-700); }

/* ---- Draft notice ---- */

.draft-notice {
  background: var(--status-warning-tint);
  border: 1px solid #EBD3A8;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: #7A4A14;
  margin-bottom: var(--space-6);
}

/* ---- Footer ---- */

.site-footer {
  background: var(--brand-slate-900);
  color: rgba(255, 255, 255, 0.78);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-20);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-10);
}

.site-footer__brand { display: flex; flex-direction: column; gap: var(--space-4); max-width: 320px; }
.site-footer__logo { display: flex; align-items: center; gap: var(--space-2); }
.site-footer__logo img { height: 30px; width: auto; }
.site-footer__wordmark { font-size: var(--text-md); font-weight: var(--weight-medium); color: var(--white); }
.site-footer__tag { font-size: var(--text-sm); line-height: 1.55; color: rgba(255, 255, 255, 0.62); }

.site-footer__col h6 {
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--brand-teal-300);
  margin: 0 0 var(--space-4);
}
.site-footer__col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__col a { font-size: var(--text-sm); color: rgba(255, 255, 255, 0.78); }
.site-footer__col a:hover { color: var(--white); }

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-12);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
}
.site-footer__bottom a { color: rgba(255, 255, 255, 0.7); }
.site-footer__bottom a:hover { color: var(--white); }

@media (max-width: 720px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; max-width: none; }
}

/* ---- Forms ---- */

.field { margin-bottom: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); }

.field label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--fg-1);
}

.field input,
.field textarea {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-2);
  background: var(--white);
  color: var(--fg-1);
  width: 100%;
  outline: none;
  transition: border-color var(--duration-2) var(--ease-standard),
              box-shadow var(--duration-2) var(--ease-standard);
}

.field input:focus,
.field textarea:focus {
  border-color: var(--brand-teal);
  box-shadow: var(--shadow-focus);
}

.field textarea { min-height: 100px; resize: vertical; line-height: 1.5; }

/* ---- Badge ---- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--brand-teal-100);
  background: var(--brand-teal-50);
  color: var(--brand-teal-700);
}