* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #111827;
  background: #f8fafc;
  line-height: 1.6;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 8%;
  background: white;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
}

.logo {
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.5px;
}

.logo span {
  font-weight: 500;
  color: #6b7280;
}

nav a {
  margin-left: 24px;
  text-decoration: none;
  color: #374151;
  font-weight: 600;
}

.hero {
  min-height: 680px;
  padding: 90px 8%;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 48px;
  align-items: center;
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, .18), transparent 35%),
    linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
}

.badge,
.section-label {
  color: #2563eb;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-size: 13px;
}

h1 {
  font-size: 64px;
  line-height: 1.05;
  margin: 18px 0;
  letter-spacing: -2px;
}

h2 {
  font-size: 38px;
  line-height: 1.15;
  margin: 10px 0 24px;
  letter-spacing: -1px;
}

h3 {
  margin-top: 0;
  font-size: 22px;
}

.hero-text p {
  font-size: 20px;
  max-width: 720px;
  color: #4b5563;
}

.buttons {
  margin-top: 34px;
}

.btn {
  display: inline-block;
  padding: 14px 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
  margin-right: 12px;
}

.primary {
  background: #111827;
  color: white;
}

.secondary {
  border: 1px solid #111827;
  color: #111827;
}

.hero-card,
.card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 26px;
  padding: 30px;
  box-shadow: 0 20px 60px rgba(15, 23, 42, .08);
}

.hero-card ul {
  padding-left: 20px;
  color: #4b5563;
}

.section {
  padding: 86px 8%;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card p {
  color: #4b5563;
}

.dark {
  background: #111827;
  color: white;
}

.dark .section-label {
  color: #93c5fd;
}

.dark-card {
  background: #1f2937;
  border-color: #374151;
}

.dark-card p {
  color: #d1d5db;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}

.split p {
  font-size: 19px;
  color: #4b5563;
}

.contact {
  text-align: center;
  padding: 90px 8%;
  background: white;
}

.contact p {
  max-width: 640px;
  margin: 0 auto 30px;
  color: #4b5563;
  font-size: 18px;
}

footer {
  text-align: center;
  padding: 30px;
  color: #6b7280;
  background: #f3f4f6;
}

@media (max-width: 850px) {
  .hero,
  .grid,
  .split {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 44px;
  }

  nav {
    display: none;
  }
}