.time-machine-hero {
  margin: 2rem 0 3.5rem;
  padding: clamp(2rem, 6vw, 5rem);
  border: 1px solid #2a2f35;
  background: radial-gradient(circle at 85% 15%, rgba(181,232,83,.16), transparent 28%), #101418;
}

.eyebrow, .era-meta { color: #b5e853; font: 700 .78rem/1.2 monospace; letter-spacing: .13em; text-transform: uppercase; }
.time-machine-hero h1 { margin: .45rem 0 1rem; font-size: clamp(2.4rem, 8vw, 5.7rem); line-height: .95; letter-spacing: -.05em; }
.lede { max-width: 45rem; font-size: clamp(1.1rem, 2vw, 1.45rem); color: #d6d9dc; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.35rem; margin-top: 2rem; }
.archive-button { display: inline-block; padding: .72rem 1rem; border: 1px solid #b5e853; color: #b5e853; font-weight: 700; text-decoration: none; }
.archive-button:hover, .archive-button:focus { background: #b5e853; color: #101418; }
.archive-link { color: #d6d9dc; }
.archive-note, .archive-gaps { margin: 0 0 4rem; max-width: 54rem; }
.timeline { position: relative; margin: 2rem 0 5rem; }
.timeline::before { content: ""; position: absolute; left: 3.45rem; top: 0; bottom: 0; width: 1px; background: #394049; }
.era { position: relative; display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: clamp(1rem, 4vw, 3rem); margin: 0 0 3rem; }
.era-date { z-index: 1; display: grid; place-items: start center; }
.era-date span { display: inline-block; padding: .45rem .55rem; border: 1px solid #b5e853; background: #15191d; color: #b5e853; font: 700 .9rem monospace; }
.era-card { padding: clamp(1.4rem, 4vw, 2.4rem); border: 1px solid #394049; background: #15191d; box-shadow: 0 14px 40px rgba(0,0,0,.18); }
.era-card h2 { margin: .4rem 0 .7rem; font-size: clamp(1.65rem, 4vw, 2.55rem); }
.status-list { margin: 1.2rem 0 1.5rem; padding-left: 1.2rem; }
.status-list li { margin: .45rem 0; }
@media (max-width: 600px) {
  .timeline::before { left: .55rem; }
  .era { grid-template-columns: 1.2rem minmax(0, 1fr); gap: .8rem; }
  .era-date { transform: translateX(-.05rem); }
  .era-date span { overflow: hidden; width: .7rem; height: .7rem; padding: 0; border-radius: 50%; color: transparent; }
}