/* === Timeline Phases section === */
.timeline-phases {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-3xl) 0;
}

/* Vertical line */
.timeline-phases__line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--surface-container-highest);
  transform: translateX(-50%);
}

.timeline-phases__line-fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
  transition: height 0.1s linear;
}

/* Phase item — 3 columns: left | node | right */
.timeline-phases__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0;
  padding: var(--space-3xl) 0;
}

/* Node (numbered square) */
.timeline-phases__node {
  position: relative;
  z-index: 2;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  background: var(--surface);
  font-family: var(--font-label);
  font-size: var(--text-body-lg);
  font-weight: 700;
  color: var(--on-surface-bright);
  transition: background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.timeline-phases__item--active .timeline-phases__node {
  box-shadow: 0 0 24px rgba(228, 54, 99, 0.35);
}

/* Left column — date + description */
.timeline-phases__left {
  text-align: right;
  padding-right: var(--space-2xl);
}

.timeline-phases__date {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--secondary);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.timeline-phases__desc-left {
  font-size: clamp(0.95rem, 1.5vw, 1.125rem);
  color: var(--on-surface-variant);
  line-height: 1.6;
  max-width: 400px;
  margin-left: auto;
}

/* Right column — title */
.timeline-phases__right {
  padding-left: var(--space-2xl);
}

.timeline-phases__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--on-surface-bright);
  line-height: 1.2;
}

/* Alternating: even items swap left/right content */
.timeline-phases__item:nth-child(even) .timeline-phases__left {
  order: 3;
  text-align: left;
  padding-left: var(--space-2xl);
  padding-right: 0;
}

.timeline-phases__item:nth-child(even) .timeline-phases__left .timeline-phases__desc-left {
  margin-left: 0;
  margin-right: auto;
}

.timeline-phases__item:nth-child(even) .timeline-phases__node {
  order: 2;
}

.timeline-phases__item:nth-child(even) .timeline-phases__right {
  order: 1;
  text-align: right;
  padding-right: var(--space-2xl);
  padding-left: 0;
}

/* === Mobile === */
@media (max-width: 767px) {
  .timeline-phases {
    padding: var(--space-xl) 0;
  }

  .timeline-phases__line {
    left: 28px;
  }

  .timeline-phases__item {
    grid-template-columns: auto 1fr;
    padding: var(--space-xl) 0;
    padding-left: 0;
    gap: 0;
  }

  .timeline-phases__node {
    width: 44px;
    height: 44px;
    font-size: var(--text-body-md);
    grid-row: 1 / 3;
    align-self: start;
    margin-top: 4px;
  }

  .timeline-phases__left,
  .timeline-phases__item:nth-child(even) .timeline-phases__left {
    order: 2;
    text-align: left;
    padding: 0 0 0 var(--space-lg);
    grid-column: 2;
  }

  .timeline-phases__left .timeline-phases__desc-left,
  .timeline-phases__item:nth-child(even) .timeline-phases__left .timeline-phases__desc-left {
    margin-left: 0;
  }

  .timeline-phases__right,
  .timeline-phases__item:nth-child(even) .timeline-phases__right {
    order: 1;
    text-align: left;
    padding: 0 0 var(--space-xs) var(--space-lg);
    grid-column: 2;
  }

  .timeline-phases__item:nth-child(even) .timeline-phases__node {
    order: 0;
  }

  .timeline-phases__date {
    font-size: clamp(1.25rem, 5vw, 1.5rem);
  }

  .timeline-phases__title {
    font-size: clamp(1.25rem, 5vw, 1.5rem);
  }
}