* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  background: #ffffff;
  color: #171717;
}

.timeline {
  padding: 4rem 1rem;
}

.intro {
  max-width: 36rem;
  margin: 0 auto;
  text-align: center;
}

.heading {
  margin: 0;
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #171717;
}

.copy {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  line-height: 1.625;
  color: #737373;
}

.track {
  position: relative;
  margin: 3.5rem auto 0;
  max-width: 48rem;
}

.line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1rem;
  width: 1px;
  overflow: hidden;
  background: #e5e5e5;
}

.line__fill {
  width: 100%;
  height: 100%;
  transform-origin: top;
  background: #171717;
}

.list {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.item {
  position: relative;
  padding-left: 3rem;
}

.item__dot {
  position: absolute;
  top: 0.375rem;
  left: 1rem;
  z-index: 1;
  width: 0.75rem;
  height: 0.75rem;
  transform: translateX(-50%);
  border-radius: 9999px;
  border: 2px solid #171717;
  background: #ffffff;
}

.item__card-wrap {
  text-align: right;
}

.item__card {
  display: inline-block;
  text-align: left;
  border-radius: 1rem;
  border: 1px solid #e5e5e5;
  background: #ffffff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  padding: 1.25rem;
}

.item__date {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #a3a3a3;
}

.item__title {
  margin: 0.5rem 0 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: #171717;
}

.item__desc {
  margin: 0.375rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: #737373;
}

.item__spacer {
  display: none;
}

@media (min-width: 1024px) {
  .track {
    max-width: 64rem;
  }

  .line {
    left: 50%;
    transform: translateX(-50%);
  }

  .item {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    padding-left: 0;
  }

  .item__dot {
    left: 50%;
  }

  .item__card-wrap {
    width: 50%;
  }

  .item__spacer {
    display: block;
    width: 50%;
  }

  .item--right {
    flex-direction: row-reverse;
  }

  .item--right .item__card-wrap {
    text-align: left;
  }
}

/*
 * Timeline 01 — "line growth + stagger" animation identity. Same canonical
 * keyframes as `Timeline01.tailwind.css`; see script.js for the
 * IntersectionObserver that adds `is-visible` once.
 */
@keyframes al-timeline01-grow {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}

@keyframes al-timeline01-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .al-timeline01.al-timeline01-js .line__fill {
    transform: scaleY(0);
  }

  .al-timeline01.al-timeline01-js.is-visible .line__fill {
    animation: al-timeline01-grow 900ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .al-timeline01.al-timeline01-js .item {
    opacity: 0;
    transform: translateY(16px);
  }

  .al-timeline01.al-timeline01-js.is-visible .item {
    animation: al-timeline01-up 600ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
}
Timeline 01

Requirements

Dependencies

Usage
