:root {
  --page-bg: #eaf1f8;
  --surface: #ffffff;
  --surface-soft: #f4f8fc;
  --border: #d4e0ee;
  --text: #133047;
  --muted: #516779;
  --brand: #1f5f93;
  --brand-dark: #17476d;
  --brand-soft: #dcebf8;
  --shadow: 0 18px 40px rgba(18, 52, 79, 0.12);
  --radius: 20px;
  --nav-width: 16rem;
  --content-width: 72rem;
  --anchor-offset: 6.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--anchor-offset);
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.8), transparent 26rem),
    linear-gradient(180deg, #dce9f6 0%, var(--page-bg) 12rem, #edf4fa 100%);
  line-height: 1.6;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
}

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

.page-shell,
.footer-inner,
.overlay-inner {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: linear-gradient(180deg, var(--brand) 0%, #256fa8 100%);
  box-shadow: 0 10px 30px rgba(18, 52, 79, 0.16);
}

.header-inner {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: #ffffff;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 11.5rem;
  max-width: 42vw;
  height: auto;
}

.menu-toggle {
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border-radius: 999px;
  width: 3.25rem;
  height: 3.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 160ms ease, transform 160ms ease;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.menu-toggle-bars,
.menu-toggle-bars::before,
.menu-toggle-bars::after {
  display: block;
  width: 1.1rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 160ms ease, opacity 160ms ease;
  content: "";
}

.menu-toggle-bars::before {
  transform: translateY(-0.4rem);
}

.menu-toggle-bars::after {
  transform: translateY(0.28rem);
}

.menu-open .menu-toggle-bars {
  background: transparent;
}

.menu-open .menu-toggle-bars::before {
  transform: rotate(45deg);
}

.menu-open .menu-toggle-bars::after {
  transform: rotate(-45deg) translate(1px, -1px);
}

.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(14, 36, 55, 0.78);
  opacity: 0;
  pointer-events: none;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transition: opacity 180ms ease;
}

.menu-open .menu-overlay {
  opacity: 1;
  pointer-events: auto;
}

.overlay-panel {
  min-height: 100vh;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.08), transparent 40%),
    linear-gradient(180deg, #0f3350 0%, var(--brand-dark) 100%);
  color: #ffffff;
  transform: translateY(1rem) scale(0.985);
  transform-origin: top center;
  transition: transform 220ms ease;
}

.menu-open .overlay-panel {
  transform: translateY(0) scale(1);
}

.overlay-inner {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: max(1rem, env(safe-area-inset-top)) 0 max(2rem, env(safe-area-inset-bottom));
}

.overlay-topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  justify-content: flex-end;
  padding: 0.25rem 0 1rem;
  background: linear-gradient(180deg, rgba(15, 51, 80, 0.96) 0%, rgba(15, 51, 80, 0.78) 72%, rgba(15, 51, 80, 0) 100%);
}

.menu-close {
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-radius: 999px;
  width: 3.25rem;
  height: 3.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 160ms ease, transform 160ms ease;
}

.menu-close:hover,
.menu-close:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  transform: rotate(90deg) scale(1.04);
}

.menu-close-icon {
  position: relative;
  width: 1.15rem;
  height: 1.15rem;
}

.menu-close-icon::before,
.menu-close-icon::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1.15rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  content: "";
  transform-origin: center;
  transition: transform 180ms ease;
}

.menu-close-icon::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.menu-close-icon::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.menu-close:hover .menu-close-icon::before,
.menu-close:focus-visible .menu-close-icon::before {
  transform: translate(-50%, -50%) rotate(58deg);
}

.menu-close:hover .menu-close-icon::after,
.menu-close:focus-visible .menu-close-icon::after {
  transform: translate(-50%, -50%) rotate(-58deg);
}

.overlay-nav {
  display: grid;
  gap: 0.7rem;
  padding-bottom: 1rem;
}

.overlay-nav a,
.overlay-nav details {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.06);
}

.overlay-nav a,
.overlay-nav summary {
  display: block;
  padding: 1rem 1.2rem;
  text-decoration: none;
  font-size: clamp(1.1rem, 2vw, 1.6rem);
}

.overlay-nav summary {
  cursor: pointer;
  list-style: none;
}

.overlay-nav summary::-webkit-details-marker {
  display: none;
}

.overlay-nav [aria-current="page"] {
  background: rgba(255, 255, 255, 0.14);
}

.overlay-subnav {
  display: grid;
  gap: 0.3rem;
  padding: 0 0.8rem 0.8rem;
}

.overlay-subnav a {
  font-size: 1rem;
  padding: 0.8rem 1rem;
}

.page-shell {
  padding: 2rem 0 4rem;
}

.hero {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), #ffffff);
  border: 1px solid rgba(31, 95, 147, 0.14);
  border-radius: calc(var(--radius) + 0.25rem);
  box-shadow: var(--shadow);
  padding: clamp(1.5rem, 4vw, 3rem);
  margin-bottom: 1.5rem;
}

.eyebrow {
  display: inline-flex;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1,
.section-block h2 {
  line-height: 1.15;
}

.hero h1 {
  margin: 1rem 0 0.8rem;
  font-size: clamp(2rem, 4vw, 3.6rem);
  max-width: 14ch;
}

.hero p {
  margin: 0;
  max-width: 46rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--brand);
}

.button-link.primary {
  background: var(--brand);
  color: #ffffff;
}

.button-link.secondary {
  background: #ffffff;
  color: var(--brand-dark);
}

.feature-grid,
.card-grid,
.footer-grid,
.metric-grid {
  display: grid;
  gap: 1rem;
}

.feature-grid,
.card-grid,
.metric-grid {
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}

.feature-card,
.card,
.metric-card,
.callout {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.feature-card,
.card,
.metric-card {
  padding: 1.3rem;
}

.feature-card h2,
.card h3,
.metric-card h2 {
  margin-top: 0;
}

.feature-card p,
.card p,
.metric-card p,
.section-block p,
.section-block li {
  color: var(--muted);
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--nav-width)) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.inpage-nav {
  position: sticky;
  top: 6rem;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.inpage-nav h2 {
  margin: 0 0 0.8rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--brand-dark);
}

.inpage-nav a {
  display: block;
  padding: 0.5rem 0;
  text-decoration: none;
  color: var(--muted);
}

.content-main {
  display: grid;
  gap: 1rem;
}

.section-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.section-block[id] {
  scroll-margin-top: var(--anchor-offset);
}

.section-block h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: clamp(1.4rem, 2vw, 2rem);
}

.section-block ul {
  margin: 0;
  padding-left: 1.25rem;
}

.section-block + .section-block {
  margin-top: 0;
}

.callout {
  padding: 1.25rem;
}

.callout strong {
  color: var(--brand-dark);
}

.site-footer {
  background: linear-gradient(180deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: rgba(255, 255, 255, 0.9);
}

.footer-inner {
  padding: 2rem 0;
}

.footer-grid {
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

.footer-grid h2 {
  margin-top: 0;
  font-size: 1rem;
}

.footer-grid a {
  display: block;
  color: rgba(255, 255, 255, 0.84);
  text-decoration: none;
  margin-top: 0.45rem;
}

.footer-note {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.74);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 760px) {
  :root {
    --anchor-offset: 4.75rem;
  }

  .header-inner,
  .page-shell,
  .footer-inner,
  .overlay-inner {
    width: min(calc(100% - 1rem), var(--content-width));
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .inpage-nav {
    position: static;
    order: -1;
  }

  .hero {
    padding: 1.35rem;
  }

  .hero h1 {
    max-width: none;
  }

  .overlay-topbar {
    padding-bottom: 0.75rem;
  }
}