body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: #f0f2f5;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}

#guestbook-container {
  background-color: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 500px;
}

h1 {
  text-align: center;
  color: #1c1e21;
  margin-bottom: 1.5rem;
}

#guestbook-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#guestbook-form input[type="text"] {
  padding: 0.75rem;
  border: 1px solid #dddfe2;
  border-radius: 6px;
  font-size: 1rem;
}

#guestbook-form button {
  padding: 0.75rem;
  background-color: #1877f2;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

#guestbook-form button:hover {
  background-color: #166fe5;
}

#guestbook-entries {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.guestbook-entry {
  background-color: #f7f8fa;
  padding: 1rem;
  border-radius: 6px;
  border: 1px solid #e0e0e0;
}

.guestbook-entry p {
  margin: 0;
}

.guestbook-entry strong {
  color: #1c1e21;
}