* {
  box-sizing: border-box;
  font-family: Tahoma, Arial;
}

body {
  margin: 0;
  background: #f4f6f8;
  color: #333;
}

/* Containers */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 20px;
}

/* Header */
.top-header {
  background: #0f2027;
}

.header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  width: 120px;
}

nav a {
  color: #fff;
  margin-left: 20px;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  color: #00c6ff;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #203a43, #2c5364);
  color: #fff;
  text-align: center;
  padding: 80px 20px;
}

.hero h1 {
  font-size: 42px;
}

.hero p {
  font-size: 18px;
  margin: 15px 0;
}

.btn {
  background: #00c6ff;
  color: #000;
  padding: 12px 25px;
  text-decoration: none;
  border-radius: 30px;
  font-weight: bold;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: -40px;
}

.feature-card {
  background: #fff;
  padding: 25px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

/* Services */
.services h2 {
  text-align: center;
  margin-bottom: 30px;
}

.service-box {
  background: #fff;
  padding: 25px;
  margin-bottom: 20px;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Footer */
footer {
  background: #111;
  color: #aaa;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
}

/* Responsive */
@media (max-width: 768px) {
  .header-flex {
    flex-direction: column;
  }

  nav {
    margin-top: 10px;
  }

  .hero h1 {
    font-size: 32px;
  }
}