:root {
  color-scheme: light;
  --background: #f4f1ea;
  --surface: #fffdf8;
  --ink: #17212b;
  --muted: #5b6670;
  --line: #263746;
  --accent: #9b2c2c;
  --border: #c8c2b7;
  --shadow: 0 0.75rem 2rem rgb(23 33 43 / 9%);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
}

body {
  min-width: 20rem;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--background);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: #1c5f87;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--accent);
}

a:focus-visible {
  outline: 0.2rem solid var(--accent);
  outline-offset: 0.2rem;
  border-radius: 0.1rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header__inner,
.site-footer {
  width: min(100% - 2rem, 72rem);
  margin-inline: auto;
}

.site-header__inner {
  padding-block: clamp(2.5rem, 7vw, 5.5rem);
  text-align: center;
}

.site-kicker {
  margin: 0 0 0.55rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

.site-intro {
  max-width: 38rem;
  margin: 1.25rem auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.timeline {
  position: relative;
  width: min(100% - 2rem, 72rem);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) 0;
  list-style: none;
}

.timeline::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 0.2rem;
  background: var(--line);
  content: "";
  transform: translateX(-50%);
}

.timeline-entry {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(3rem, 7vw, 5.5rem);
  margin: 0;
}

.timeline-entry:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  z-index: 2;
  top: 1.65rem;
  left: 50%;
  width: 1.15rem;
  height: 1.15rem;
  border: 0.22rem solid var(--line);
  border-radius: 50%;
  background: var(--background);
  transform: translate(-50%, -50%);
}

.timeline-card {
  position: relative;
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.timeline-entry:nth-child(odd) .timeline-card {
  grid-column: 1;
}

.timeline-entry:nth-child(even) .timeline-card {
  grid-column: 2;
}

.timeline-date {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-title {
  margin: 0.35rem 0 0;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.timeline-cves {
  margin: 0.65rem 0 0;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  font-weight: 700;
}

.timeline-body p {
  margin: 1rem 0 0;
}

.site-footer {
  padding-block: 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

@media (min-width: 44.0625rem) {
  .timeline-entry {
    pointer-events: none;
  }

  .timeline-card {
    pointer-events: auto;
  }

  .timeline-entry + .timeline-entry {
    margin-top: -5rem;
  }
}

@media (max-width: 44rem) {
  .site-header__inner {
    text-align: left;
  }

  .timeline {
    width: min(100% - 1.25rem, 40rem);
    padding-left: 3rem;
  }

  .timeline::before {
    left: 1rem;
    transform: none;
  }

  .timeline-entry {
    grid-template-columns: 1fr;
    column-gap: 0;
    margin-bottom: 2rem;
  }

  .timeline-entry:nth-child(odd) .timeline-card,
  .timeline-entry:nth-child(even) .timeline-card {
    grid-column: 1;
  }

  .timeline-marker {
    left: -2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}