/**
 * Linha do tempo Empatheia — animada
 * Usa variáveis de site.css; ativação via .timeline--in-view (JS).
 * Respeita prefers-reduced-motion.
 */

.timeline {
  --timeline-line-width: 3px;
  --timeline-node-size: 16px;
  --timeline-gap: 2rem;
  position: relative;
  padding: calc(var(--space) * 2) 0;
  margin: calc(var(--space) * 3) 0;
}

.timeline__inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--space) * 1.25) var(--space) 0;
}

/* Linha vertical (posicionada em relação ao __inner) */
.timeline__track {
  position: absolute;
  left: calc((var(--timeline-node-size) / 2) - (var(--timeline-line-width) / 2));
  top: 0;
  bottom: 0;
  width: var(--timeline-line-width);
  background: var(--color-border);
  border-radius: 2px;
  transform-origin: top;
}

/* Linha: altura controlada pelo scroll via --timeline-progress (0 a 1) no JS */
.timeline__track__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  border-radius: 2px;
  transform-origin: top;
  transition: transform 0.15s ease-out;
}

.timeline[data-timeline-js] .timeline__track__fill {
  transform: scaleY(var(--timeline-progress, 0));
}

.timeline:not([data-timeline-js]) .timeline__track__fill {
  transform: scaleY(1);
}

/* Lista de marcos */
.timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.timeline__item {
  position: relative;
  padding-left: calc(var(--timeline-node-size) + var(--timeline-gap));
  padding-bottom: calc(var(--space) * 2);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.timeline[data-timeline-js] .timeline__item {
  opacity: 0;
  transform: translateX(-20px);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

/* Cada item anima ao entrar na viewport (classe .timeline__item--in-view pelo JS) */
.timeline[data-timeline-js] .timeline__item--in-view {
  opacity: 1;
  transform: translateX(0);
}

/* Nó (círculo) na linha */
.timeline__node {
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: var(--timeline-node-size);
  height: var(--timeline-node-size);
  border-radius: 50%;
  background: var(--color-bg-section);
  border: var(--timeline-line-width) solid var(--color-border);
  box-sizing: border-box;
  transition: transform 0.4s ease-out, opacity 0.35s ease-out,
              border-color 0.3s ease, background 0.3s ease;
}

.timeline[data-timeline-js] .timeline__item .timeline__node {
  transform: scale(0);
  opacity: 0;
}

.timeline[data-timeline-js] .timeline__item--in-view .timeline__node {
  transform: scale(1);
  opacity: 1;
  border-color: var(--color-accent);
  background: var(--color-white);
}

/* Conteúdo do marco */
.timeline__year {
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-accent);
  margin: 0 0 0.25rem;
}

.timeline__heading {
  font-family: var(--font-primary);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.5rem;
}

.timeline__text {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text);
  margin: 0;
}

@media (min-width: 640px) {
  .timeline__item {
    padding-bottom: calc(var(--space) * 2.5);
  }
}

/* Redução de movimento */
@media (prefers-reduced-motion: reduce) {
  .timeline__track__fill,
  .timeline__item,
  .timeline__node {
    transition: none;
  }

  .timeline__item {
    opacity: 1;
    transform: none;
  }

  .timeline__track__fill {
    transform: scaleY(1);
  }

  .timeline__node {
    transform: scale(1);
    opacity: 1;
    border-color: var(--color-accent);
    background: var(--color-white);
  }
}