html {
  scroll-behavior: smooth;
}
body {
  font-family: "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
  line-height: 1.6;
}
header {
  background: #007bff;
  color: #fff;
  padding: 20px 0;
  text-align: center;
  border-radius: 0 0 10px 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}
header h1 {
  margin: 0;
  font-size: 2rem;
}
header h1 a {
  color: #fff;
  text-decoration: none;
}
header h1 a:hover {
  text-decoration: underline;
}
main {
  max-width: 900px;
  margin: 30px auto 60px;
  background: #fff;
  padding: 30px 40px;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}
h1,
h2 {
  color: #007bff;
  margin-bottom: 15px;
}
p,
li,
a {
  font-size: 1rem;
  margin-bottom: 12px;
  color: #333;
  line-height: 1.5;
}
ul {
  padding-left: 20px;
  margin-bottom: 20px;
}
a {
  color: #007bff;
  text-decoration: none;
}
a:hover,
a:focus {
  text-decoration: underline;
  outline: none;
}
img {
  display: block;
  max-width: 200px;
  height: auto;
  border-radius: 10px;
  margin: 15px auto 30px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}
section {
  margin-bottom: 40px;
}
footer {
  text-align: center;
  padding: 15px;
  background: #f1f1f1;
  font-size: 0.9rem;
  color: #666;
  border-top: 1px solid #ddd;
  margin-top: 60px;
}
@media (max-width: 600px) {
  header h1 {
    font-size: 1.5rem;
  }
  main {
    padding: 20px;
    margin: 20px 10px 40px;
  }
  img {
    max-width: 150px;
    margin-bottom: 20px;
  }
}