body {
  font-family: Arial;
  padding: 25px;
  background: #f4f4f4;
}

.container {
  max-width: 700px;
  margin: auto;
  display: grid;
  gap: 18px;
}

.item {
  background: #fff;
  padding: 15px;
  border-radius: 8px;
}

.row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.row input[type="number"] {
  width: 90px;
  padding: 5px;
}

.row input[type="range"] {
  width: 100%;
}

h2 {
  text-align: center;
  margin-top: 30px;
}

h3 {
  margin-bottom: -5px;
}