/* ============================================
   SOSTENIBILITÀ — pagina hub (sostenibilita.html)
   Raccoglie il filo ambientale del sito: 2007 zero rifiuti,
   Green Energy Campus, Green Day Italia.
   Le schede dei due case study riusano le classi .eredita-grid
   e .ered-card definite in fixes.css (sezione 9bis).
   ============================================ */

:root { --gec-green: #2F7A3A; }

/* ---- TESTATA ---- */

.sost-header {
  padding: 120px 32px 72px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: end;
  border-bottom: 1.5px solid var(--inchiostro);
}

.sost-header-eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.sost-header-eyebrow .mono {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gec-green);
}

.sost-header-title {
  font-family: var(--font-display);
  font-size: clamp(52px, 8vw, 104px);
  line-height: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin-bottom: 26px;
}

.sost-header-title span { color: var(--gec-green); }

.sost-header-sub {
  font-size: 17px;
  line-height: 1.7;
  max-width: 56ch;
  color: var(--inchiostro2);
}

.sost-header-mark {
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
}

/* Artwork bianco su trasparente: invertito diventa inchiostro,
   niente cornice — vive direttamente sul fondo carta. */
.sost-header-mark img {
  width: 100%;
  max-width: 160px;
  object-fit: contain;
  filter: invert(1);
  opacity: 0.9;
}

/* ---- CITAZIONE ---- */

.sost-quote {
  background: var(--inchiostro);
  color: var(--carta);
  padding: 72px 32px;
  border-bottom: 1.5px solid var(--gec-green);
}

.sost-quote blockquote {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.8vw, 34px);
  line-height: 1.4;
  max-width: 26ch;
  font-style: italic;
}

.sost-quote .sost-quote-attr {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.6;
  margin-top: 26px;
  display: block;
}

/* ---- CRONOLOGIA ---- */

.sost-timeline {
  padding: 88px 32px;
  background: var(--carta);
}

.sost-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--inchiostro2);
  opacity: 0.7;
  margin-bottom: 40px;
}

.sost-step {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 40px;
  padding: 34px 0;
  border-top: 1px solid var(--carta-mid);
  align-items: start;
}

.sost-step:last-child { border-bottom: 1px solid var(--carta-mid); }

.sost-step-year {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1;
  color: var(--gec-green);
}

.sost-step-year small {
  display: block;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--inchiostro2);
  opacity: 0.7;
  margin-top: 8px;
}

.sost-step h3 {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin-bottom: 12px;
}

.sost-step p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--inchiostro2);
  max-width: 66ch;
}

.sost-step p a { color: var(--gec-green); }

/* ---- BLOCCO CASE STUDY (riusa .eredita da fixes.css) ---- */

.sost-cases {
  padding: 80px 32px;
  background: var(--carta-dark);
  border-top: 1.5px solid var(--inchiostro);
  border-bottom: 1.5px solid var(--inchiostro);
}

.sost-cases-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 0.96;
  text-transform: uppercase;
  margin-bottom: 40px;
}

.sost-cases-title span { color: var(--gec-green); }

/* ---- CHIUSURA ---- */

.sost-outro {
  padding: 80px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.sost-outro h2 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1;
  text-transform: uppercase;
}

.sost-outro p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--inchiostro2);
  margin-bottom: 26px;
}

.sost-outro .ered-cta { display: inline-block; }

@media (max-width: 900px) {
  .sost-header {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 100px 20px 56px;
  }
  .sost-header-mark { justify-content: flex-start; }
  .sost-header-mark img { max-width: 110px; }
  .sost-step { grid-template-columns: 1fr; gap: 14px; }
  .sost-outro { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 600px) {
  .sost-quote,
  .sost-timeline,
  .sost-cases,
  .sost-outro { padding-left: 20px; padding-right: 20px; }
}