:root {
  --timeline-blue-dark: #0416a8;
  --timeline-purple: #4547f2;
  --timeline-text: #17213f;
  --timeline-line: #8d96ad;
  --timeline-radius: 18px;
}

.history-section {
  width: min(1320px, calc(100% - 48px));
  margin: 28px auto 48px;
  display: grid;
  grid-template-columns: minmax(420px, 0.9fr) minmax(460px, 1fr);
  gap: clamp(36px, 8vw, 126px);
  align-items: center;
}

.timeline {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--timeline-line);
}

.timeline-item {
  border-bottom: 1px solid var(--timeline-line);
}

.timeline-trigger {
  width: 100%;
  appearance: none;
  border: 0;
  background: transparent;
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  text-align: left;
  cursor: pointer;
  color: var(--timeline-blue-dark);
  font-weight: 800;
  font-size: clamp(20px, 2vw, 24px);
  line-height: 1.2;
}

.timeline-trigger:focus-visible {
  outline: 3px solid rgba(69, 71, 242, 0.28);
  outline-offset: 4px;
  border-radius: 8px;
}

.timeline-icon {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--timeline-purple);
}

.timeline-icon svg {
  width: 18px;
  height: 18px;
  stroke-width: 2.6;
  transition: transform 0.25s ease;
}

.timeline-item.is-active .timeline-icon svg {
  transform: rotate(180deg);
}

.timeline-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}

.timeline-item.is-active .timeline-panel {
  grid-template-rows: 1fr;
}

.timeline-panel-inner {
  overflow: hidden;
}

.timeline-content {
  padding: 4px 0 40px;
  max-width: 590px;
}

.timeline-content h3 {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--timeline-text);
}

.timeline-content p {
  margin: 0;
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: #202945;
}

.timeline-visual-wrap {
  width: 100%;
}

.timeline-visual-card {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--timeline-radius);
  overflow: hidden;
  background: #f5f5f5;
}

.timeline-visual-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.28s ease, transform 0.45s ease;
}

.timeline-mobile-image {
  display: none;
}

@media (max-width: 900px) {
  .history-section {
    width: min(100% - 32px, 720px);
    grid-template-columns: 1fr;
    gap: 24px;
    margin-block: 22px 42px;
  }

  .timeline-visual-wrap {
    order: -1;
  }

  .timeline-trigger {
    padding: 18px 0;
    font-size: 21px;
  }

  .timeline-content {
    padding-bottom: 28px;
  }

  .timeline-content p {
    font-size: 16px;
  }
}

@media (max-width: 560px) {
  .history-section {
    width: calc(100% - 28px);
    margin-block: 16px 34px;
  }

  .timeline-visual-wrap {
    display: none;
  }

  .timeline-mobile-image {
    display: block;
    margin: 2px 0 22px;
  }

  .timeline-mobile-image .timeline-visual-card {
    aspect-ratio: 1 / 1;
    border-radius: 14px;
  }

  .timeline-icon {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }
}