* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #002339;
  color: #fff;
  font-family: sans-serif;
}

.container {
  margin: 12% auto;
  width: 90%;
  max-width: 700px;
}

h1 {
  font-size: 32px;
  margin-bottom: 20px;
}

.display {
  width: 100%;
  margin-top: 30px;
  margin-bottom: 30px;
  background: #fff;
  color: #333;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 5px;
  padding: 20px;
}

.display input {
  border: 0;
  outline: none;
  font-size: 20px;
  width: 100%;
  color: #333;
  background: transparent;
}

.btn {
  background-color: #00bfff;
  color: white;
  border: none;
  padding: 12px 20px;
  margin-top: 20px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 5px;
}

.option {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.option label {
  margin-right: 5px;
  font-size: 14px;
}

.option input[type="checkbox"],
.option input[type="number"] {
  margin-right: 15px;
  transform: scale(1.2);
}