:root {
  --navy: #0b1220;
  --blue: #1f4fa8;
  --gold: #f4b41a;
  --light: #f5f7fb;
  --muted: #8a92a8;
  --radius: 12px;
  --max: 1080px;
}
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: radial-gradient(
    circle at top,
    #1b2a4a 0,
    #050814 55%,
    #020308 100%
  );
  color: #f9fbff;
  line-height: 1.6;
}
.shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
header {
  padding: 1.2rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 10, 25, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero {
  padding: 3.5rem 0 3rem;
  text-align: left;
}
.hero h1 {
  font-size: clamp(2.2rem, 3vw + 1.2rem, 3.2rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}
.hero h1 span {
  background: linear-gradient(120deg, #ffffff, var(--gold));
  -webkit-background-clip: text;
  color: transparent;
}
.hero p {
  max-width: 40rem;
  color: #c0c7e6;
  margin-bottom: 1.6rem;
}
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: 0.15s ease-out;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue), #2f6de0);
  color: #fff;
  box-shadow: 0 12px 30px rgba(10, 40, 120, 0.6);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(10, 40, 120, 0.75);
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.25);
  color: #e3e8ff;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
}
section {
  padding: 2.8rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.section-title {
  font-size: 1.6rem;
  margin-bottom: 0.6rem;
}
.section-lead {
  max-width: 36rem;
  color: #c0c7e6;
  margin-bottom: 1.6rem;
}
.grid {
  display: grid;
  gap: 1.2rem;
}
@media (min-width: 760px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}
.card {
  background: linear-gradient(
    150deg,
    rgba(10, 20, 50, 0.96),
    rgba(5, 10, 25, 0.98)
  );
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  color: #c0c7e6;
}
.card h3 {
  color: #fff;
  margin-bottom: 0.4rem;
  font-size: 1.05rem;
}
footer {
  padding: 1.6rem 0;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 2rem;
}