:root {
  color-scheme: dark;
  --ink: #f4f7f5;
  --muted: #98aaa7;
  --panel: rgba(15, 29, 31, 0.86);
  --line: rgba(202, 230, 225, 0.14);
  --water: #071b21;
  --accent: #69d6bd;
  --wind: #8fddff;
  --force: #ef7f75;
  --keel: #a8df78;
  --rudder: #63b3ff;
  --total: #f7f4e7;
  --chain: #f7c76a;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 70% 15%, rgba(45, 119, 123, 0.2), transparent 33rem), var(--water);
  color: var(--ink);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
}
.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 72px;
}
.brand {
  color: var(--ink);
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.topnav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.topnav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
}
.topnav a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.06);
}
.topnav a[aria-current='page'] {
  color: var(--ink);
  background: rgba(105, 214, 189, 0.13);
}
.hero {
  max-width: 760px;
  margin-bottom: 42px;
}
.eyebrow {
  margin: 0 0 9px;
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
h1 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(2.2rem, 6vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
  font-weight: 650;
}
.intro {
  max-width: 650px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.6;
}
.use-cases {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.use-case {
  min-height: 320px;
  display: grid;
  grid-template-rows: 180px auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.2);
  transition:
    transform 0.18s ease,
    border-color 0.18s ease;
}
.use-case:hover {
  transform: translateY(-3px);
  border-color: rgba(105, 214, 189, 0.42);
}
.illustration {
  display: grid;
  place-items: center;
  background: rgba(5, 16, 18, 0.28);
  border-bottom: 1px solid var(--line);
}
.illustration svg {
  width: 94%;
  height: 158px;
  display: block;
}
.copy {
  padding: 22px;
}
.copy h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.copy p {
  margin: 9px 0 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.9rem;
}
.open {
  display: inline-block;
  margin-top: 17px;
  color: var(--accent);
  font-size: 0.84rem;
}
@media (prefers-reduced-motion: reduce) {
  .use-case {
    transition: none;
  }
}
@media (max-width: 700px) {
  .app {
    padding: 15px;
  }
  .topbar {
    margin-bottom: 52px;
  }
  .use-cases {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 480px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
  .topnav {
    flex-wrap: wrap;
  }
}