body {
  font-family: Arial;
  padding: 20px;
  background: #0f172a;
  color: white;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

.cards {
  display: flex;
  gap: 15px;
  margin: 20px 0;
}

.card {
  background: #1e293b;
  padding: 20px;
  flex: 1;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  text-align: center;
  font-size: 18px;
}

input, select {
  padding: 10px;
  margin: 5px;
  border-radius: 6px;
  border: none;
}

button {
  padding: 10px 15px;
  background: #38bdf8;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-left: 10px;
}

button:hover {
  background: #0ea5e9;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  background: #1e293b;
  margin: 8px 0;
  padding: 12px;
  border-radius: 8px;
}

.hidden {
  display: none;
}