:root {
  --rosso: #c0392b;
  --arancio: #e67e22;
  --grigio-chiaro: #f9f9f9;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--grigio-chiaro);
  padding: 30px;
  max-width: 900px;
  margin: auto;
  color: #333;
}

h1 {
  color: var(--rosso);
  text-align: center;
  margin-bottom: 40px;
}

section {
  background: white;
  margin-bottom: 30px;
  padding: 20px;
  border-left: 5px solid var(--arancio);
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
}

h2 {
  color: var(--rosso);
  font-size: 1.3em;
  margin-bottom: 15px;
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: 5px;
}

.input-field {
  width: 100%;
  max-width: 160px;
  padding: 6px 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1em;
  margin-bottom: 10px;
  box-sizing: border-box;
}

input[type="radio"] {
  margin-right: 5px;
}

button {
  background-color: var(--rosso);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1em;
  transition: background 0.3s ease;
  margin-top: 10px;
}

button:hover {
  background-color: var(--arancio);
}

.output {
  font-weight: bold;
  color: var(--rosso);
  margin-top: 12px;
}

.error {
  color: red;
  font-weight: bold;
}

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

.flex-input>div {
  flex: 1;
  min-width: 140px;
}

.radio-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.radio-container label {
  flex: 1 1 calc(50% - 10px);
}

.btn-codice {
  background-color: #aaa;
  color: white;
  border: none;
  padding: 8px 14px;
  border-radius: 5px;
  font-size: 0.9em;
  cursor: pointer;
}

.codice-buttons {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

footer {
  background: #f0f0f0;
  color: #333;
}