body {
  font-family: Arial;
  text-align: center;
  padding: 25px;
  background: linear-gradient(to bottom, #dff6ff, #ffffff);
  transition: 0.3s;
}

h1 {
  font-size: 36px;
  color: #1565c0;
}

.subtitle {
  color: gray;
  margin-bottom: 20px;
}

.boothCard {
  background: white;
  padding: 25px;
  margin: 20px auto;
  width: 400px;
  border-radius: 25px;
  border: 5px solid #2196f3;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  transition: 0.3s;
}

input {
  padding: 10px;
  margin: 6px;
  width: 90%;
  font-size: 16px;
  border-radius: 12px;
  border: 2px solid #90caf9;
}

button {
  padding: 10px 15px;
  margin: 8px;
  font-size: 15px;
  cursor: pointer;
  border: none;
  border-radius: 12px;
}

.mainBtn {
  background: #2196f3;
  color: white;
}

.addBtn {
  background: #43a047;
  color: white;
}

.copyBtn {
  background: #ff9800;
  color: white;
}

.clearBtn {
  background: #f44336;
  color: white;
}

.darkBtn {
  background: black;
  color: white;
}

.output {
  margin-top: 15px;
  padding: 12px;
  border-radius: 15px;
  background: #f1f8ff;
  font-weight: bold;
  text-align: left;
}

ul {
  text-align: left;
  padding-left: 20px;
}

/* 🌙 DARK MODE */
.dark {
  background: #121212;
  color: white;
}

.dark .boothCard {
  background: #1e1e1e;
  border-color: #ff9800;
}

.dark .output {
  background: #333;
}