/* ─── NUMBERS BAND ─── */
#numbers {
  background: var(--bg-inv);
  padding: 80px 60px;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.number-item {
  padding: 20px 40px;
  border-right: 1px solid rgba(247,244,239,.08);
  text-align: center;
}

.number-item:last-child { border-right: none; }

.number-value {
  font-family: var(--serif);
  font-size: clamp(2.8rem, 4vw, 4rem);
  font-weight: 300;
  color: var(--ink-inv);
  line-height: 1;
  margin-bottom: 10px;
  display: block;
  white-space: nowrap;
  font-variant-numeric: lining-nums tabular-nums;
}

.number-label {
  font-size: .72rem;
  font-weight: 400;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(247,244,239,.45);
}

/* ─── ABOUT ─── */
#about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
  background: var(--bg);
}

.about-left {
  position: sticky;
  top: 120px;
}

.about-right { }

.about-visual {
  position: relative;
  aspect-ratio: 4/5;
}

.about-img-wrap {
  position: absolute;
  inset: 0;
  background: var(--bg-2);
  overflow: hidden;
  border: 1px solid var(--border);
}

.about-img-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 55% 45%, rgba(43,69,56,.12) 0%, transparent 65%);
}

.about-img-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 7rem;
  font-weight: 300;
  color: var(--green-pale);
  letter-spacing: .05em;
  user-select: none;
}

.about-accent {
  position: absolute;
  bottom: -18px; right: -18px;
  width: 110px; height: 110px;
  border: 1px solid var(--green-pale);
}

.about-accent-2 {
  position: absolute;
  top: -18px; left: -18px;
  width: 72px; height: 72px;
  border: 1px solid var(--bg-3);
}

.about-list {
  list-style: none;
  margin-top: 44px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  font-size: .88rem;
  color: var(--gray-2);
  line-height: 1.65;
}

.about-list li::before {
  content: '';
  flex-shrink: 0;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  margin-top: 7px;
}

/* ─── MANIFESTO ─── */
#manifesto {
  background: var(--bg-inv);
  padding: 130px 60px;
  text-align: center;
}

.manifesto-text {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  font-weight: 300;
  line-height: 1.35;
  color: var(--ink-inv);
  max-width: 900px;
  margin: 0 auto 48px;
}

.manifesto-text strong { font-weight: 600; }

.manifesto-source {
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(247,244,239,.35);
}

/* ─── APPROACH ─── */
#approach { background: var(--bg); }

.approach-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
}

.approach-sticky {
  position: sticky;
  top: 120px;
}

.approach-steps {
  display: flex;
  flex-direction: column;
}

.step {
  padding: 40px 0;
  border-bottom: 1px solid var(--border-2);
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 28px;
  align-items: start;
  opacity: .28;
  transition: opacity .4s;
}

.step.active { opacity: 1; }
.step:first-child { border-top: 1px solid var(--border-2); }

.step-num {
  font-family: var(--serif);
  font-size: 2.4rem;
  font-weight: 300;
  color: var(--green);
  line-height: 1;
}

.step-title {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 400;
  margin-bottom: 12px;
  color: var(--ink);
}

.step-desc {
  font-size: .85rem;
  color: var(--gray);
  line-height: 1.7;
}

/* ─── PARTNERS ─── */
#partners {
  background: var(--bg-2);
  padding: 100px 60px;
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.partners-title {
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 60px;
}

.partners-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
}

.partner-item {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: .08em;
  color: var(--gray-3);
  transition: color .3s;
  cursor: default;
}

.partner-item:hover { color: var(--ink-2); }

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  #numbers { padding: 60px 32px; }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .number-item:nth-child(2n) { border-right: none; }
  .number-item:nth-child(3),
  .number-item:nth-child(4) { border-top: 1px solid rgba(247,244,239,.08); }

  section { padding: 100px 32px; }

#about { grid-template-columns: 1fr; gap: 48px; }
  .about-left { position: static; }

  .approach-wrap { grid-template-columns: 1fr; gap: 60px; }
  .approach-sticky { position: static; }

  #manifesto { padding: 100px 32px; }
  #partners { padding: 72px 32px; }
}

@media (max-width: 640px) {
  section { padding: 80px 20px; }
  #numbers { padding: 52px 20px; }
  .number-item { padding: 16px 12px; }
  .number-value { font-size: 1.5rem; }
  #manifesto { padding: 80px 20px; }
  #partners { padding: 72px 20px; }
  .partners-row { gap: 32px; }
  /* Tutti gli step sempre leggibili su mobile */
  .step { opacity: 1; }
}