:root {
  --navy: #07111f;
  --blue: #2866d7;
  --signal-blue: #3c7af0;
  --teal: #35d4c2;
  --white: #f7fafc;
  --slate: #9bacc2;
  --line: rgba(247, 250, 252, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--white);
  background:
    radial-gradient(circle at 78% 20%, rgba(40, 102, 215, 0.18), transparent 28rem),
    var(--navy);
  font-family: Inter, Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  width: min(1160px, calc(100% - 40px));
  min-height: 84px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.brand-mark,
.brand em {
  color: var(--teal);
  font-style: normal;
}

nav {
  display: flex;
  gap: 24px;
  align-items: center;
  font-size: 0.92rem;
  color: #d7e2f0;
}

.nav-cta {
  padding: 10px 14px;
  border: 1px solid rgba(53, 212, 194, 0.7);
  border-radius: 7px;
  color: var(--teal);
}

.hero,
.section,
.contact-section {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  min-height: 620px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 50px;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--teal);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
}

h1,
h2,
h3 {
  margin-top: 0;
}

h1 {
  max-width: 750px;
  margin-bottom: 20px;
  font-size: clamp(2.7rem, 6vw, 5.2rem);
  line-height: 1.03;
  letter-spacing: -0.05em;
}

h2 {
  max-width: 720px;
  margin-bottom: 35px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-text,
.contact-section > p:not(.eyebrow):not(.small-note) {
  max-width: 620px;
  color: var(--slate);
  font-size: 1.1rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-block;
  padding: 14px 19px;
  border-radius: 7px;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--navy);
  background: var(--teal);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.spire-visual {
  position: relative;
  width: min(360px, 80vw);
  height: 390px;
  margin: 0 auto;
}

.spire {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  clip-path: polygon(50% 0, 100% 100%, 75% 100%, 50% 80%, 25% 100%, 0 100%);
}

.top {
  top: 0;
  width: 145px;
  height: 205px;
  background: var(--signal-blue);
}

.middle {
  top: 100px;
  width: 260px;
  height: 205px;
  background: var(--blue);
}

.base {
  top: 205px;
  width: 350px;
  height: 160px;
  background: #12347a;
}

.core {
  position: absolute;
  z-index: 2;
  top: 203px;
  left: 50%;
  display: grid;
  width: 72px;
  height: 72px;
  place-items: center;
  transform: translateX(-50%) rotate(45deg);
  background: var(--teal);
  color: var(--white);
  font-size: 2rem;
  box-shadow: 0 0 45px rgba(53, 212, 194, 0.35);
}

.core::first-letter {
  transform: rotate(-45deg);
}

.node {
  position: absolute;
  z-index: 3;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 18px rgba(53, 212, 194, 0.7);
}

.node-one { top: 173px; right: 3px; }
.node-two { top: 245px; left: 5px; }
.node-three { top: 310px; right: 27px; }

.section {
  padding: 100px 0;
  border-top: 1px solid var(--line);
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.card {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
}

.card h3 {
  color: var(--white);
  font-size: 1.1rem;
}

.card p,
.approach-list p {
  color: var(--slate);
  line-height: 1.6;
}

.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
}

.approach-list > div {
  display: grid;
  grid-template-columns: 55px 1fr;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.approach-list span {
  color: var(--teal);
  font-weight: 800;
}

.contact-section {
  margin-top: 30px;
  margin-bottom: 85px;
  padding: 65px;
  border-radius: 14px;
  background: linear-gradient(135deg, #12347a, #07111f 72%);
}

.small-note {
  margin-top: 18px;
  color: var(--slate);
  font-size: 0.82rem;
}

footer {
  display: flex;
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: 25px 0 35px;
  justify-content: space-between;
  color: #7990aa;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}

@media (max-width: 780px) {
  .site-header {
    min-height: 70px;
  }

  nav a:not(.nav-cta) {
    display: none;
  }

  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 75px 0;
    min-height: auto;
  }

  .spire-visual {
    transform: scale(0.82);
    transform-origin: top center;
    margin-bottom: -60px;
  }

  .cards {
    grid-template-columns: 1fr 1fr;
  }

  .contact-section {
    padding: 38px 25px;
  }

  footer {
    gap: 12px;
    flex-direction: column;
  }
}

@media (max-width: 500px) {
  .cards {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2.7rem;
  }
}