body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
  color: #333;
}
.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}
header {
  background: #0d1117;
  color: #fff;
  padding: 15px 0;
}
header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header nav a {
  color: #fff;
  margin-left: 20px;
  text-decoration: none;
  font-weight: bold;
}
.logo {
  height: 40px;
}
.hero {
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: white;
  text-align: center;
  padding: 100px 20px;
}
.hero h1 {
  font-size: 2.5rem;
}
.hero .btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 25px;
  background: #00c853;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1.2rem;
}
.about, .features, .cta {
  padding: 60px 20px;
  text-align: center;
}
.features .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}
.features .card {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.cta {
  background: #203a43;
  color: white;
}
.cta .btn {
  background: #ff9800;
  margin-top: 20px;
}
footer {
  background: #0d1117;
  color: white;
  text-align: center;
  padding: 20px 0;
}