/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background-color: #f4f4f4;
  color: #333;
}

/* Header */
header {
  background-color: #222;
  color: #fff;
  padding: 20px 0;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

/* Navigation */
nav {
  background-color: #444;
  display: flex;
  justify-content: center;
}

nav a {
  color: #fff;
  padding: 15px 20px;
  text-decoration: none;
  transition: background-color 0.3s ease;
}

nav a:hover {
  background-color: #666;
}

/* Main layout */
.container {
  max-width: 1000px;
  margin: 30px auto;
  padding: 20px;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1, h2 {
  margin-bottom: 20px;
}

p {
  margin-bottom: 15px;
}

/* Footer */
footer {
  background-color: #222;
  color: #ccc;
  text-align: center;
  padding: 15px 0;
  margin-top: 40px;
}

/* Buttons */
.btn {
  background-color: #007BFF;
  color: #fff;
  padding: 10px 18px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.btn:hover {
  background-color: #0056b3;
  transform: scale(1.05);
}

/* Responsive */
@media (max-width: 600px) {
  nav {
    flex-direction: column;
  }

  nav a {
    text-align: center;
    padding: 10px;
  }

  .container {
    padding: 15px;
  }
}
