:root {
  --primary: #357DED;
  --primary-light: #5c8efe;
  --bg-light: #f9f9f9;
  --text-dark: #1f2937;
  --nav-bg: #0f172a;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
}
header {
  background: var(--nav-bg);
  padding: 15px 10px;
  position: sticky;
  top: 0;
  z-index: 999;
}
.navbar {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.nav-links a {
  color: white;
  text-decoration: none;
  font-size: 16px;
  padding: 6px 0;
  transition: color 0.3s ease;
}
.nav-links a:hover {
  color: #66b2ff;
}
.nav-action {
  background: white;
  color: var(--primary);
  padding: 8px 18px;
  border-radius: 8px;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
}
.nav-action:hover {
  background: var(--primary);
  color: white;
}
.hero {
  background: linear-gradient(to right, var(--primary), var(--primary-light));
  padding: 60px 20px;
  color: white;
  text-align: center;
}
.hero h1 {
  font-size: 36px;
  margin-bottom: 12px;
}
.hero p {
  font-size: 18px;
}
.btn {
  display: inline-block;
  background: white;
  color: var(--primary);
  padding: 10px 24px;
  border-radius: 8px;
  margin-top: 20px;
  text-decoration: none;
  font-weight: bold;
}
.section {
  padding: 50px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.section h2 {
  text-align: center;
  margin-bottom: 40px;
  font-size: 28px;
  color: var(--primary);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.06);
  text-align: center;
}
footer {
  background: var(--nav-bg);
  color: white;
  padding: 40px 20px;
}
footer .links {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  margin-top: 30px;
}
footer .links div {
  margin-bottom: 20px;
}
footer .links a {
  color: #ccc;
  display: block;
  font-size: 14px;
  margin-bottom: 5px;
  text-decoration: none;
}
@media (max-width: 768px) {
  .hero h1 {
    font-size: 26px;
  }
  .hero p {
    font-size: 16px;
  }
  .navbar {
    flex-direction: column;
    gap: 15px;
  }
  .nav-links {
    justify-content: center;
  }
}