:root {
  color-scheme: light;
  --navy: #0b2038;
  --navy-soft: #102a43;
  --ink: #172033;
  --muted: #566276;
  --teal: #2ab7ad;
  --line: #dce5ed;
  --paper: #f7fafc;
  --white: #ffffff;
  font-family: Georgia, "Times New Roman", serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 18px;
  line-height: 1.55;
}

a { color: inherit; }

.hero {
  min-height: 690px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(330px, .75fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
  padding: clamp(4rem, 8vw, 8rem) max(6vw, calc((100vw - 1180px) / 2));
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(7, 25, 46, .98) 0%, rgba(7, 25, 46, .88) 46%, rgba(7, 25, 46, .22) 100%),
    url("assets/platform-architecture-background.png") center / cover no-repeat,
    var(--navy);
}

.hero__content { max-width: 750px; }

.eyebrow,
.review-card__label,
.section-number {
  margin: 0 0 1rem;
  color: #69d5cc;
  font-family: Arial, Helvetica, sans-serif;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

h1,
h2,
p { text-wrap: pretty; }

h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(3.25rem, 7vw, 6.5rem);
  font-weight: 700;
  letter-spacing: -.045em;
  line-height: .94;
}

.hero__lead {
  max-width: 680px;
  margin: 2rem 0 0;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  line-height: 1.3;
}

.hero__summary {
  max-width: 660px;
  margin: 1.5rem 0 0;
  color: #d7e2ec;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 2.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: .8rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 5px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
  transition: background-color .16s ease, border-color .16s ease, transform .16s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button--primary {
  border-color: var(--teal);
  color: #07192e;
  background: var(--teal);
}

.button--primary:hover,
.button--primary:focus-visible { background: #55cec5; }

.button--secondary:hover,
.button--secondary:focus-visible { background: rgba(255, 255, 255, .09); }

.review-card {
  padding: clamp(2rem, 4vw, 3rem);
  border: 1px solid rgba(132, 202, 214, .35);
  border-radius: 10px;
  background: rgba(8, 30, 53, .86);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .25);
  backdrop-filter: blur(8px);
}

.review-card h2 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.1;
}

.review-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.review-card li {
  position: relative;
  padding: .55rem 0 .55rem 1.4rem;
  border-top: 1px solid rgba(255, 255, 255, .12);
}

.review-card li::before {
  content: "";
  position: absolute;
  top: 1.25rem;
  left: .1rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--teal);
}

.review-card__note {
  margin: 1.4rem 0 0;
  color: #b7c7d6;
  font-size: .9rem;
}

.details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7rem) 2rem;
}

.details article {
  padding: 0 clamp(1.5rem, 4vw, 3rem);
  border-left: 1px solid var(--line);
}

.details article:first-child { padding-left: 0; border-left: 0; }
.details article:last-child { padding-right: 0; }

.details h2 {
  margin: 0 0 1rem;
  font-size: 1.55rem;
  line-height: 1.2;
}

.details p:last-child { margin: 0; color: var(--muted); }
.section-number { color: #0f766e; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  max-width: 1180px;
  margin: 0 auto;
  padding: 2.25rem 2rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
}

footer p { margin: 0; }

footer nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
}

footer a { text-underline-offset: .2em; }

@media (max-width: 900px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    background-position: 62% center;
  }

  .review-card { max-width: 620px; }

  .details { grid-template-columns: 1fr; gap: 2.5rem; }
  .details article,
  .details article:first-child,
  .details article:last-child {
    padding: 0 0 0 1.5rem;
    border-left: 1px solid var(--line);
  }
}

@media (max-width: 560px) {
  body { font-size: 17px; }
  .hero { padding: 4rem 1.35rem; }
  h1 { font-size: clamp(3rem, 16vw, 4.5rem); }
  .actions { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  footer { flex-direction: column; padding-inline: 1.35rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}