* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #f5f3ee;
  --ink: #1f2430;
  --muted: #5a6172;
  --line: #d5cfc2;
  --accent: #0f7b6c;
  --card: #ffffff;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--ink);
}

.intro {
  max-width: 640px;
  margin: 0 auto;
  padding: 96px 24px 48px;
  text-align: center;
}

.intro h1 {
  font-size: 2.5rem;
  line-height: 1.15;
  margin-bottom: 12px;
}

.intro p {
  color: var(--muted);
}

.timeline {
  position: relative;
  list-style: none;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 24px 96px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  inset-inline-start: calc(50% - 1px);
  width: 2px;
  background: var(--line);
}

.item {
  position: relative;
  width: 50%;
  padding-block: 0 48px;
  padding-inline: 0 40px;
  text-align: end;
}

.item:nth-child(even) {
  margin-inline-start: 50%;
  padding-inline: 40px 0;
  text-align: start;
}

.item::before {
  content: "";
  position: absolute;
  top: 8px;
  inset-inline-end: -8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
}

.item:nth-child(even)::before {
  inset-inline-end: auto;
  inset-inline-start: -8px;
}

.item time {
  display: inline-block;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.item h2 {
  font-size: 1.25rem;
  margin: 4px 0 8px;
}

.item p {
  color: var(--muted);
  background: var(--card);
  padding: 16px 20px;
  border-radius: 10px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.05);
}

.reveal-ready .item {
  opacity: 0;
  --shift: -32px;
  transform: translateX(var(--shift));
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal-ready .item:nth-child(even) {
  --shift: 32px;
}

[dir="rtl"] .reveal-ready .item,
.reveal-ready[dir="rtl"] .item {
  --shift: 32px;
}

[dir="rtl"] .reveal-ready .item:nth-child(even),
.reveal-ready[dir="rtl"] .item:nth-child(even) {
  --shift: -32px;
}

.reveal-ready .item.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 720px) {
  .intro {
    padding-top: 64px;
  }

  .intro h1 {
    font-size: 2rem;
  }

  .timeline {
    padding-inline: 20px 16px;
  }

  .timeline::before {
    inset-inline-start: 27px;
  }

  .item,
  .item:nth-child(even) {
    width: auto;
    margin-inline-start: 0;
    padding-inline: 36px 0;
    text-align: start;
  }

  .item::before,
  .item:nth-child(even)::before {
    inset-inline-end: auto;
    inset-inline-start: 0;
  }

  .reveal-ready .item,
  .reveal-ready .item:nth-child(even) {
    --shift: 24px;
  }

  [dir="rtl"] .reveal-ready .item,
  .reveal-ready[dir="rtl"] .item,
  [dir="rtl"] .reveal-ready .item:nth-child(even),
  .reveal-ready[dir="rtl"] .item:nth-child(even) {
    --shift: -24px;
  }
}

.outro {
  text-align: center;
  padding: 0 24px 64px;
}

.outro a {
  color: var(--accent);
  font-weight: 600;
  padding: 4px 6px;
  border-radius: 4px;
  text-underline-offset: 3px;
}

.outro a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .reveal-ready .item,
  .reveal-ready .item:nth-child(even) {
    opacity: 1;
    transform: none;
    transition: none;
  }
}