body {
  font-family: system-ui, sans-serif;
  margin: 2rem;
  background: #f4f4f4;
  color: #333;
}

header {
  margin-bottom: 2rem;
}

section {
  margin-bottom: 2rem;
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h2 {
  margin-top: 0;
}

textarea {
  width: 100%;
  height: 100px;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  padding: 0.5rem;
  font-size: 1rem;
  resize: vertical;
}

button {
  padding: 0.5rem 1rem;
  background: #0077cc;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background: #005fa3;
}

#messageCards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.message-card {
  background: #e8f5e9;
  border-left: 5px solid #4caf50;
  padding: 1rem;
  border-radius: 4px;
}