body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f4f7f6;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background-color: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 500px;
  text-align: center;
}

h1 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
}

.contact-form {
  text-align: left;
  margin-top: 2rem;
  border-top: 1px solid #eee;
  padding-top: 1.5rem;
}

.contact-form h2 {
  margin-bottom: 1rem;
  color: #34495e;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-sizing: border-box; /* padding이 width에 포함되도록 설정 */
  font-size: 1rem;
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.submit-btn {
  width: 100%;
  padding: 0.75rem;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.submit-btn:hover {
  background-color: #2980b9;
}

button[onclick] {
  margin-bottom: 1rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
}