/* ============================================================
   MATERIEPRIME.TRADING - FOGLIO DI STILE
   Palette: bianco, nero e un solo colore di accento (--accento)
   ============================================================ */
:root {
  --accento: #1e5631;
  --oro: #c9a227;
  --oro-chiaro: #fbf6e7;
  --nero: #111;
  --grigio: #6b6b6b;
  --riga: #e2e2e2;
  --nav-bg: #ffffff;
  --nav-testo: #111111;
  --nav-riga: #e2e2e2;
  --footer-bg: #111111;
  --footer-testo: #b8b8b8;
  --footer-riga: #2a2a2a;
  --footer-basso: #000000;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--nero);
  background: #fff;
}

/* ---------- NAVBAR ---------- */
header {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-riga);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
}

.nav .logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav .logo img {
  height: 42px;
  width: auto;
  display: block;
}

.hamburger {
  background: none;
  border: 0;
  padding: 6px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 6px 0;
  background: var(--nav-testo);
}

.menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0 18px 10px;
}

.menu.aperto {
  display: block;
}

.menu li a {
  display: block;
  padding: 12px 0;
  color: var(--nav-testo);
  text-decoration: none;
  font-weight: 600;
  border-top: 1px solid var(--nav-riga);
}

/* ---------- CONTENUTO ---------- */
main {
  max-width: 700px;
  margin: 0 auto;
  padding: 28px 18px 48px;
}

h1 {
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 8px;
  color: var(--nero);
  letter-spacing: -0.5px;
}

.sottotitolo {
  color: var(--grigio);
  font-size: 18px;
  margin: 0 0 22px;
}

.foto {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 8px;
}

.didascalia {
  font-size: 13px;
  color: var(--grigio);
  margin: 0 0 24px;
}

h2 {
  font-size: 22px;
  color: var(--nero);
  margin: 40px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accento);
}

h3 {
  color: var(--nero);
}

p {
  margin: 0 0 14px;
}

ul {
  padding-left: 22px;
}

li {
  margin-bottom: 6px;
}

a {
  color: var(--accento);
}

/* Paesi produttori */
.paesi {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
}

.paesi li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--riga);
}

.paesi li strong {
  color: var(--accento);
  text-align: right;
}

/* Elenco puntato per dati con descrizioni lunghe (crolli, numeri chiave) */
.elenco {
  padding-left: 22px;
  margin: 0 0 14px;
}

.elenco li {
  margin-bottom: 8px;
}

/* Pro e contro */
.pro-contro {
  border: 1px solid var(--riga);
  padding: 14px 16px;
  margin-bottom: 14px;
}

.pro-contro h3 {
  margin: 0 0 8px;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.pro-contro.pro {
  border-left: 4px solid var(--accento);
}

.pro-contro.contro {
  border-left: 4px solid var(--nero);
}

.pro-contro ul {
  margin: 0;
}

/* Schede ETC */
.etc {
  border: 1px solid var(--riga);
  border-left: 4px solid var(--accento);
  padding: 14px 16px;
  margin-bottom: 14px;
}

.etc h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.etc dl {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 6px 10px;
  margin: 0;
  font-size: 15px;
}

.etc dt {
  color: var(--grigio);
}

.etc dd {
  margin: 0;
}

.etc .ter {
  font-weight: 700;
  color: var(--accento);
}

.etc.azione {
  border-left-color: var(--nero);
}

.etc.azione p {
  font-size: 15px;
  margin: 0 0 10px;
}

.nota {
  font-size: 14px;
  color: var(--grigio);
  margin-top: 10px;
}

/* FAQ */
details {
  border-bottom: 1px solid var(--riga);
}

summary {
  padding: 14px 0;
  font-weight: 600;
  cursor: pointer;
  color: var(--nero);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  color: var(--accento);
  font-size: 24px;
  font-weight: 700;
  flex-shrink: 0;
}

details[open] summary::after {
  content: "–";
}

details p {
  padding-bottom: 14px;
}

/* Griglie e riquadri */
.griglia {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.griglia li {
  margin: 0;
}

.griglia a {
  display: block;
  height: 100%;
  border: 1px solid var(--riga);
  border-left: 4px solid var(--accento);
  padding: 10px 12px;
  text-decoration: none;
  font-weight: 600;
  color: var(--nero);
}

.griglia small {
  display: block;
  font-weight: 400;
  color: var(--grigio);
  font-size: 13px;
  line-height: 1.4;
  margin-top: 2px;
}

.nessuno {
  border: 1px solid var(--oro);
  border-left: 4px solid var(--oro);
  background: var(--oro-chiaro);
  padding: 14px 16px;
  margin-bottom: 14px;
}

.nessuno p:last-child {
  margin-bottom: 0;
}

.avviso {
  border: 3px solid var(--oro);
  background: var(--oro-chiaro);
  padding: 16px 18px;
  margin: 24px 0;
}

.avviso h2 {
  margin-top: 0;
  border-bottom: 0;
  padding-bottom: 0;
}

.avviso p:last-child {
  margin-bottom: 0;
}

.glossario dt {
  font-weight: 700;
  margin-top: 18px;
}

.glossario dd {
  margin: 4px 0 0;
}

/* ---------- BOX SPONSOR ---------- */
.sponsor {
  border: 3px solid var(--oro);
  background: var(--oro-chiaro);
  padding: 16px 18px;
  margin: 40px 0 8px;
}

.sponsor-etichetta {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--grigio);
  margin: 0 0 10px;
}

.sponsor-testata {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.sponsor .bandiera {
  flex-shrink: 0;
}

.sponsor h3 {
  margin: 0;
  font-size: 21px;
}

.sponsor h3 a {
  color: var(--nero);
  text-decoration: none;
}

.sponsor p {
  margin: 0 0 12px;
}

.sponsor-bottone {
  display: inline-block;
  background: var(--oro);
  color: #ffffff;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 4px;
  text-decoration: none;
}

.sponsor-nota {
  font-size: 12px;
  color: var(--grigio);
  margin: 0;
}

/* ---------- FOOTER ---------- */
footer {
  background: var(--footer-bg);
  color: var(--footer-testo);
  border-top: 4px solid var(--accento);
  font-size: 14px;
  line-height: 1.6;
}

.footer-griglia {
  max-width: 1000px;
  margin: 0 auto;
  padding: 36px 18px 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 20px;
}

.footer-col:first-child {
  grid-column: 1 / -1;
}

.footer-logo {
  margin: 0 0 10px;
}

.footer-logo img {
  height: 44px;
  width: auto;
  display: block;
}

.footer-col h4 {
  color: #fff;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin: 0 0 12px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--footer-testo);
  text-decoration: none;
}

.footer-col a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-disclaimer {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 18px 24px;
  border-top: 1px solid var(--footer-riga);
  font-size: 13px;
  color: var(--footer-testo);
}

.footer-disclaimer a {
  color: #fff;
}

.footer-basso {
  background: var(--footer-basso);
  padding: 14px 18px;
  text-align: center;
  font-size: 13px;
}

.footer-basso p {
  margin: 0;
}

/* ---------- SCHERMI GRANDI ---------- */
@media (min-width: 800px) {
  .hamburger {
    display: none;
  }

  .nav {
    max-width: 1000px;
    margin: 0 auto;
  }

  .menu {
    display: flex;
    justify-content: center;
    gap: 28px;
    padding: 0 18px 12px;
  }

  .menu li a {
    border-top: 0;
    padding: 4px 0;
  }

  h1 {
    font-size: 42px;
  }

  .griglia {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .footer-griglia {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .footer-col:first-child {
    grid-column: auto;
    padding-right: 30px;
  }
}