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

body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  color: #333;
  line-height: 1.5;
}

header {
  background-color: #222;
  color: white;
  padding: 1rem 2rem;
  text-align: center;
  font-size: 1.5rem;
  font-weight: bold;
  letter-spacing: 1px;
}

footer {
  padding: 1rem 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: #777;
}

/* Buttons */
button {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  background-color: #007bff;
  color: white;
  cursor: pointer;
  transition: background 0.3s ease;
  font-size: 1rem;
  margin: 0.5rem 0;
}

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

/* Inputs */
input,
textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  margin-top: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
  resize: none; /* disables manual resize for textarea */
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus,
textarea:focus {
  border-color: #007bff;
  box-shadow: 0 0 5px rgba(0, 123, 255, 0.3);
}

#chat_box {
  height: 400px;
  overflow-y: auto;
  padding: 1rem;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.chat_messages {
  padding: 0.5rem 0.75rem;
  background-color: #e9ecef;
  border-radius: 6px;
  max-width: 70%;
  word-wrap: break-word;
  align-self: flex-start;
}

#message_form {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}