* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #fff;
  color: #333;
}
header {
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
}
header img {
  height: 100px;
}
nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
nav a {
  text-decoration: none;
  color: #333;
  font-weight: 600;
}
.hero {
  margin-top: 80px;
  text-align: center;
  padding: 50px 20px;
}
.hero h1 {
  font-size: 48px;
  margin-bottom: 10px;
}
.hero p {
  font-size: 20px;
  color: #777;
  margin-bottom: 30px;
}
.hero .btn {
  background: #27ae60;
  color: #fff;
  padding: 15px 30px;
  border: none;
  border-radius: 30px;
  font-size: 16px;
  cursor: pointer;
}
.section {
  padding: 60px 20px;
  text-align: center;
}
.section img {
  max-width: 100%;
  height: auto;
  margin-top: 20px;
}
footer {
  background: #111;
  color: #fff;
  text-align: center;
  padding: 20px;
}
.footer-nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.footer-nav a {
  color: #aaa;
  text-decoration: none;
}
@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }
  .hero p {
    font-size: 18px;
  }
  nav {
    justify-content: center;
    gap: 15px;
    padding-top: 10px;
  }
}