:root {
  --verde: #1f3a26;
  --verde-chiaro: #e8eee6;
  --giallo: #f2c12e;
  --inchiostro: #23201c;
  --grigio: #5b5750;
  --carta: #fbfaf6;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--carta);
  color: var(--inchiostro);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
}

header {
  background: var(--verde);
  color: #fff;
  padding: 18px 20px;
  border-bottom: 6px solid var(--giallo);
}

header a {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 15px;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.collana {
  display: inline-block;
  background: var(--giallo);
  color: var(--verde);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  margin-bottom: 12px;
}

h1 {
  color: var(--verde);
  font-size: 30px;
  line-height: 1.2;
  margin: 0 0 20px;
}

h2 {
  color: var(--verde);
  font-size: 21px;
  line-height: 1.3;
  margin: 0 0 8px;
}

p { margin: 0 0 16px; }

.bonus {
  background: #fff;
  border-left: 6px solid var(--verde);
  padding: 20px 20px 22px;
  margin: 24px 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.pulsante {
  display: inline-block;
  background: var(--verde);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 13px 20px;
  border-radius: 4px;
  margin-top: 4px;
}

.pulsante:hover,
.pulsante:focus { background: #2c5237; }

.nota {
  font-weight: 700;
  color: var(--verde);
  margin-top: 28px;
}

.firma { font-style: italic; color: var(--grigio); }

.elenco-libri { list-style: none; padding: 0; margin: 0; }

.elenco-libri li {
  background: #fff;
  border-left: 6px solid var(--giallo);
  padding: 16px 18px;
  margin-bottom: 14px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.elenco-libri a { color: var(--verde); font-weight: 700; }

footer {
  border-top: 1px solid #ddd8cc;
  color: var(--grigio);
  font-size: 14px;
  text-align: center;
  padding: 20px;
}

main p a { color: var(--verde); font-weight: 700; }