/* ═══════════════════════════════════════════════════════════
   HOW WE WORK — timeline verticale interattiva
   ═══════════════════════════════════════════════════════════ */

.process {
  background: var(--bg);
  position: relative;
}

.process::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 340px;
  background: radial-gradient(60% 100% at 50% 0%, rgba(0, 113, 227, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.timeline {
  position: relative;
  padding-left: 76px;
}

.timeline__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.timeline__rail {
  position: absolute;
  inset: 26px auto 36px 27px;
  width: 2px;
  border-radius: 2px;
  background: var(--border);
  overflow: hidden;
}

.timeline__progress {
  display: block;
  width: 100%;
  height: 0;
  background: var(--grad-accent);
  transition: height 0.2s linear;
}

/* ── Singola fase ── */

.phase { position: relative; }

.phase__marker {
  position: absolute;
  left: -76px;
  top: 14px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--glass-2);
  border: 1px solid var(--glass-line);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  box-shadow: var(--shadow-sm);
  color: var(--muted-2);
  transition:
    transform var(--dur-slow) var(--ease-out),
    background var(--dur-slow) var(--ease),
    color var(--dur-slow) var(--ease),
    box-shadow var(--dur-slow) var(--ease);
}

.phase__marker-num,
.phase__marker-icon {
  grid-area: 1 / 1;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.phase__marker-num {
  font-size: var(--fs-caption);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
}

.phase__marker-icon {
  font-size: 20px;
  opacity: 0;
  transform: scale(0.6);
}

.phase.is-open .phase__marker {
  background: var(--grad-accent);
  color: #fff;
  box-shadow: 0 10px 28px rgba(0, 113, 227, 0.34);
  transform: scale(1.06);
}

.phase.is-open .phase__marker-num { opacity: 0; transform: scale(0.6); }
.phase.is-open .phase__marker-icon { opacity: 1; transform: scale(1); }

.phase:not(.is-open):hover .phase__marker {
  color: var(--blue);
  transform: scale(1.04);
}

/* ── Card della fase ── */

.phase__card {
  overflow: hidden;
  padding: 0;
}

.phase__card:hover { transform: none; }

.phase.is-open .phase__card {
  border-color: rgba(0, 113, 227, 0.26);
  box-shadow: var(--shadow-lg);
}

.phase__heading { margin: 0; font-size: inherit; font-weight: inherit; }

.phase__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) clamp(20px, 3vw, 32px);
  text-align: left;
  transition: background var(--dur) var(--ease);
}

.phase__trigger:hover { background: rgba(0, 113, 227, 0.04); }

.phase__step {
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: var(--tracking-label);
  color: var(--blue);
  min-width: 2ch;
}

.phase__name {
  font-size: var(--fs-h4);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  line-height: 1.25;
  color: var(--text);
}

.phase__duration {
  font-size: var(--fs-label);
  font-weight: 500;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: var(--blue-light);
  color: var(--blue-dark);
  white-space: nowrap;
}

.phase__chevron {
  position: relative;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.phase__chevron::before,
.phase__chevron::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--blue);
  border-radius: 2px;
  transition: transform var(--dur-slow) var(--ease-out), opacity var(--dur) var(--ease);
}

.phase__chevron::before { width: 12px; height: 2px; }
.phase__chevron::after  { width: 2px; height: 12px; }

.phase.is-open .phase__chevron::after { transform: rotate(90deg); opacity: 0; }
.phase.is-open .phase__chevron::before { transform: rotate(180deg); }

/* ── Corpo espandibile ── */

.phase__body {
  overflow: hidden;
  height: 0;
  transition: height var(--dur-slow) var(--ease-out);
}

.phase__inner {
  display: grid;
  gap: var(--space-5);
  padding: 0 clamp(20px, 3vw, 32px) var(--space-6);
}

.phase__text {
  font-size: var(--fs-body);
  font-weight: 300;
  line-height: var(--lh-relaxed);
  color: var(--muted);
  max-width: 68ch;
}

.phase__image {
  width: 100%;
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* Con immagine il layout diventa a due colonne su desktop. */
@media (min-width: 900px) {
  .phase__inner:has(.phase__image) {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (max-width: 720px) {
  .timeline { padding-left: 56px; }
  .timeline__rail { left: 19px; inset-block: 22px 30px; }

  .phase__marker {
    left: -56px;
    top: 12px;
    width: 40px;
    height: 40px;
  }

  .phase__marker-icon { font-size: 16px; }

  /* Su mobile la durata scende sotto al titolo per non stringere il tocco. */
  .phase__trigger {
    grid-template-columns: auto 1fr auto;
    padding: var(--space-4) var(--space-4);
    gap: var(--space-3);
  }

  .phase__duration {
    grid-column: 2 / -1;
    justify-self: start;
    margin-top: var(--space-1);
  }

  .phase__inner { padding-inline: var(--space-4); }
}