body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #f7f7f9;
  margin: 0;
  padding: 20px;
  color: #222;
}

.container {
  max-width: 420px;
  margin: auto;
  background: white;
  padding: 24px;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
}

h1 {
  margin-top: 0;
}

.subtitle {
  color: #555;
  margin-bottom: 20px;
}

label {
  display: block;
  margin-top: 14px;
  font-weight: 600;
}

input[type="number"] {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  margin-top: 6px;
}

.plates {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.plates label {
  font-weight: normal;
}

#resultText {
  margin-top: 20px;
  font-weight: 600;
}

#platesVisual {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}

.plate {
  background: #222;
  color: white;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 14px;
}

.education {
  margin-top: 30px;
  font-size: 14px;
  color: #444;
}
.ad-slot {
  margin: 24px 0;
  text-align: center;
}
/* Volume calculator rows (optional) */
.set-row input {
  margin-top: 6px;
}