body {
  font-family: sans-serif;
  background: #f4fff4;
}

h1 {
  background: #2e8b57;
  color: white;
  padding: 10px;
}

.hidden { display: none; }

.today {
  background: #fff3cd;
  padding: 10px;
  font-size: 18px;
  font-weight: bold;
}

button {
  background: #ffb7c5;
  border: none;
  padding: 6px 10px;
  margin: 4px;
  border-radius: 6px;
}