:root {
  --ink: #05070b;
  --navy: #07172a;
  --blue-900: #065f8f;
  --blue-700: #0786c7;
  --blue-500: #17a7ef;
  --blue-300: #66c4f7;
  --sky: #e9f7ff;
  --paper: #ffffff;
  --muted: #596575;
  --line: #d8e7f1;
  --shadow: 0 18px 46px rgba(4, 27, 48, 0.14);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 4vw, 56px);
  background: rgba(5, 7, 11, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
}

.brand img {
  width: 250px;
  height: auto;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 24px;
  color: #f8fbff;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  position: relative;
  text-decoration: none;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  background: var(--blue-500);
  content: "";
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 420px);
  align-items: center;
  gap: clamp(28px, 6vw, 84px);
  min-height: calc(100vh - 62px);
  overflow: hidden;
  padding: clamp(40px, 5vw, 60px) clamp(22px, 6vw, 92px);
  background:
    linear-gradient(120deg, rgba(5, 7, 11, 0.96) 0%, rgba(7, 23, 42, 0.96) 54%, rgba(6, 95, 143, 0.9) 100%),
    var(--navy);
  color: #ffffff;
}

.hero::before {
  position: absolute;
  inset: auto 0 0 auto;
  width: min(52vw, 620px);
  height: min(52vw, 620px);
  border: 22px solid rgba(23, 167, 239, 0.14);
  border-right: 0;
  border-bottom: 0;
  content: "";
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(90deg, black, transparent 78%);
  opacity: 0.38;
}

.hero-content,
.hero-mark {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--blue-500);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(38px, 5vw, 60px);
  line-height: 1.03;
}

.hero-copy {
  max-width: 690px;
  margin: 20px 0 0;
  color: #d6edfb;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 12px 18px;
  font-weight: 800;
  text-decoration: none;
}

.button.secondary {
  border-color: rgba(255, 255, 255, 0.36);
  color: #ffffff;
}

.hero-mark {
  justify-self: center;
  width: min(100%, 340px);
  padding: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.section-shell {
  width: min(1120px, calc(100% - 44px));
  margin: 0 auto;
  padding: 86px 0;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 1.1fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: start;
  border-bottom: 1px solid var(--line);
}

h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
}

h3 {
  margin: 0;
  color: var(--navy);
  font-size: 22px;
  line-height: 1.2;
}

p {
  margin: 0;
}

.intro > p,
.section-heading p,
.standards-copy p,
.standard-panel p,
.contact p,
.site-footer p {
  color: var(--muted);
  font-size: 17px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.section-heading p {
  margin-top: 14px;
}

.cards {
  display: grid;
  gap: 18px;
}

.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  min-height: 260px;
  padding: 28px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(7, 23, 42, 0.08);
}

.card-number {
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  background: var(--sky);
  border-radius: 6px;
  color: var(--blue-900);
  font-weight: 900;
}

.card p {
  margin-top: 14px;
  color: var(--muted);
}

.standards {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(300px, 1fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: center;
}

.standards-copy p {
  margin-top: 18px;
}

.standard-panel {
  padding: 30px;
  background: var(--navy);
  border-radius: 8px;
  color: #ffffff;
  box-shadow: var(--shadow);
}

.standard-panel img {
  width: 90px;
  margin-bottom: 24px;
}

.standard-panel h3 {
  color: #ffffff;
}

.standard-panel p {
  margin-top: 16px;
  color: #d6edfb;
}

.contact {
  background: var(--ink);
  color: #ffffff;
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(320px, 1.25fr);
  gap: clamp(28px, 6vw, 74px);
}

.contact h2 {
  color: #ffffff;
}

.contact p {
  margin-top: 14px;
  color: #d6edfb;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.contact-item {
  min-height: 150px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

.contact-item span {
  display: block;
  margin-bottom: 12px;
  color: var(--blue-300);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.contact-item strong {
  display: block;
  color: #ffffff;
  font-size: 19px;
  line-height: 1.3;
}

.contact-item a {
  text-decoration-color: rgba(102, 196, 247, 0.6);
  text-underline-offset: 4px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px clamp(22px, 6vw, 72px);
  background: #ffffff;
  border-top: 1px solid var(--line);
}

.site-footer img {
  width: 260px;
}

.footer-copy {
  max-width: 430px;
  text-align: right;
}

.footer-copy p + p {
  margin-top: 6px;
}

.site-footer .copyright {
  font-size: 9px;
  line-height: 1.25;
}

@media (max-width: 860px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .brand img {
    width: 220px;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero,
  .intro,
  .standards,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-mark {
    width: min(100%, 280px);
    justify-self: start;
  }

  .three-up,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .section-shell {
    width: min(100% - 32px, 1120px);
    padding: 64px 0;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-copy {
    text-align: left;
  }
}

@media (max-width: 520px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .button {
    width: 100%;
  }

}