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

body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  color: #333;
  line-height: 1.6;
}

header {
  background-color: #333;
  color: #fff;
  padding: 10px 0;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

nav h1 {
  font-size: 24px;
}

nav ul {
  list-style: none;
  display: flex;
}

nav ul li {
  margin-left: 20px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-size: 16px;
}

main {
  max-width: 900px;
  margin: 20px auto;
  padding: 20px;
  background-color: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

article h2 {
  font-size: 28px;
  margin-bottom: 20px;
}

article h3 {
  font-size: 24px;
  margin-top: 20px;
}

article h4 {
  font-size: 20px;
  margin-top: 10px;
  margin-bottom: 10px;
}

article p {
  margin-bottom: 20px;
}

footer {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 10px 0;
  margin-top: 20px;
}

footer p {
  margin: 0;
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    text-align: center;
  }

  nav ul li {
    margin-left: 0;
    margin-bottom: 10px;
  }
}

/* Contact page styles */
.contact-section {
  width: 60%;
  margin: 50px auto;
  text-align: center;
}

.contact-section h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  max-width: 500px;
  margin: 0 auto;
}

.contact-form label {
  text-align: left;
  font-weight: bold;
}

.contact-form input,
.contact-form textarea {
  padding: 10px;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
}

.contact-form button {
  padding: 12px 20px;
  font-size: 1rem;
  background-color: #007BFF;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.contact-form button:hover {
  background-color: #0056b3;
}

/* About page styles */
.about-section {
  width: 60%;
  margin: 50px auto;
  text-align: center;
}

.about-section h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.author-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin: 20px 0;
}

.about-section p {
  font-size: 1.1rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.about-section h3 {
  font-size: 2rem;
  margin-top: 40px;
}

a {
  color: #007BFF;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}