body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background-color: #121212;
  color: #f1f1f1;
}

.container {
  max-width: 600px;
  margin: 50px auto;
  background-color: #1e1e1e;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 12px rgba(0, 255, 255, 0.2);
}

h1 {
  text-align: center;
  color: #00ffff;
}

.input-section {
  display: flex;
  gap: 10px;
}

input[type="text"] {
  flex: 1;
  padding: 10px;
  background-color: #2c2c2c;
  border: 1px solid #444;
  color: #fff;
  border-radius: 5px;
}

button {
  padding: 10px 20px;
  background-color: #00bcd4;
  border: none;
  border-radius: 5px;
  color: #000;
  font-weight: bold;
  cursor: pointer;
}

ul {
  margin-top: 20px;
  list-style: none;
  padding: 0;
}

li {
  background-color: #2e2e2e;
  padding: 10px;
  margin-bottom: 8px;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

li span {
  flex: 1;
}

li button {
  background-color: #ff5252;
  color: #fff;
  padding: 6px 10px;
  border: none;
  border-radius: 4px;
  margin-left: 10px;
  cursor: pointer;
}