body {
  font-family: sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 20px;
}
.container {
  max-width: 600px;
  margin: auto;
  background: white;
  padding: 30px;
  border-radius: 8px;
}
h2 {
  text-align: center;
}
form label {
  font-weight: bold;
  display: block;
  margin-top: 20px;
}
form select,
form input[type="text"] {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  margin-top: 5px;
}
button {
  margin-top: 30px;
  width: 100%;
  padding: 12px;
  font-size: 18px;
  background: green;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.tabs {
  list-style: none;
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
  padding: 0;
}
.tabs li {
  padding: 10px 20px;
  margin: 0 5px;
  background: #ccc;
  cursor: pointer;
  border-radius: 5px 5px 0 0;
}
.tabs li.current {
  background: green;
  color: white;
}
.tab-content {
  display: none;
}
.tab-content.current {
  display: block;
}
.rehearsal-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 10px;
}
.rehearsal-grid label {
  display: block;
  background: #eee;
  padding: 10px;
  text-align: center;
  cursor: pointer;
  border-radius: 6px;
}