body {
  font-family: Arial, sans-serif;
  font-size: 24px;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
  color: #333;
}
header {
  background-color: #004080;
  color: white;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header .logo {
  height: 50px;
}
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}
nav ul li {
  margin-left: 20px;
}
nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}
nav ul li a:hover {
  text-decoration: underline;
}
main {
  padding: 20px;
  max-width: 900px;
  margin: 0 auto;
  background-color: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1, h2, h3 {
  color: #004080;
}
button, .btn {
  background-color: #004080;
  color: white;
  border: none;
  padding: 10px 15px;
  cursor: pointer;
  font-size: 1em;
  border-radius: 4px;
}
button:hover, .btn:hover {
  background-color: #003060;
}
form {
  display: flex;
  flex-direction: column;
  max-width: 400px;
}
form label {
  margin-top: 10px;
  margin-bottom: 5px;
  font-weight: bold;
}
form input, form textarea {
  padding: 8px;
  font-size: 1em;
  border: 1px solid #ccc;
  border-radius: 4px;
}
form textarea {
  resize: vertical;
  min-height: 100px;
}

img, .logo {
  max-width: 100%;
  height: auto;
}

@media (max-width: 768px) {
  body {
    font-size: 16px;
  }
  header {
    flex-direction: column;
    align-items: flex-start;
    padding: 10px;
  }
  header .logo {
    height: 40px;
    margin-bottom: 10px;
  }
  nav ul {
    flex-direction: column;
    width: 100%;
  }
  nav ul li {
    margin-left: 0;
    margin-bottom: 10px;
  }
  nav ul li:last-child {
    margin-bottom: 0;
  }
  main {
    padding: 10px;
    max-width: 100%;
    box-shadow: none;
    margin: 0;
  }
  form {
    max-width: 100%;
  }
}