:root {
  --header-h: 70px;
  --footer-h: 60px;
  --bg-color: #f4f4f4;
  --primary: #007bff;
  --secondary: #6c757d;
  --border: #ccc;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: var(--bg-color);
}

/* Buttons */
button {
  background: var(--primary);
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}
button:hover {
  background: #0056b3;
}

/* Chat berichten */
.message {
  padding: 6px 10px;
  margin: 4px;
  border-radius: 10px;
  max-width: 75%;
}
.message.sent {
  background: var(--primary);
  color: white;
  align-self: flex-end;
}
.message.received {
  background: #e5e5ea;
  color: black;
  align-self: flex-start;
}