body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  padding: 20px;
  background-color: #f4f4f9;
}
h1 {
  color: #333;
}
.controls {
  margin-bottom: 20px;
}
.controls label {
  margin-right: 10px;
}
.classroom {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.seat {
  position: relative;
  width: 100px;
  height: 100px;
  border: 2px solid #007bff;
  border-radius: 5px;
  background-color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  cursor: move;
}
.seat input {
  font-size: 30px;
  width: 70px;
  text-align: center;
  border: none;
  outline: none;
}
.delete-btn,
.lock-btn {
  position: absolute;
  width: 15px;
  height: 15px;
  color: white;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  justify-content: center;
  align-items: center;
  font-size: 10px;
  line-height: 15px;
  display: none;
}
.delete-btn {
  top: -5px;
  right: -5px;
  background-color: red;
}
.lock-btn {
  top: -5px;
  left: -5px;
  background-color: green;
}
.seat:hover .delete-btn,
.seat:hover .lock-btn {
  display: flex;
}
.podium {
  width: 50%;
  height: 80px;
  background-color: #7592a7;
  display: flex;
  font-size: 50px;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
  font-weight: bold;
}
button {
  padding: 10px 20px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
  margin: 5px;
}
button:hover {
  background-color: #0056b3;
}
.status {
  margin-top: 20px;
  font-size: 18px;
  color: #ff0000;
}

@media (max-width: 768px) {
  .delete-btn,
  .lock-btn {
    display: flex;
  }
}