* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background: #f8f8f8;
  color: #333;
  padding-bottom: 80px;
}

.container {
  width: 90%;
  max-width: 1000px;
  margin: auto;
  padding: 1rem 0;
}

header {
  background: #4a90e2;
  color: white;
  padding: 1.5rem 0;
  text-align: center;
}

header nav a {
  color: white;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: bold;
}

header nav a:hover {
  text-decoration: underline;
}

.intro {
  text-align: center;
  margin: 2rem 0;
}

.btn {
  display: inline-block;
  margin: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: #4a90e2;
  color: white;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-size: 1rem;
}

.btn:hover {
  background: #357ab8;
}

footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
  position: fixed;
  bottom: 0;
  width: 100%;
}