/* ==========================================================================
   SECTION 3 — CAREER TIMELINE
   Interactive vertical timeline with a scroll-fill rail and expandable entries.
   ========================================================================== */

.timeline { position: relative; }

.tl {
  position: relative;
  max-width: 860px;
  margin-top: var(--space-8);
  padding-left: var(--space-7);
}
/* Rail + animated gold progress overlay */
.tl::before {
  content: "";
  position: absolute;
  left: 7px; top: 6px; bottom: 6px;
  width: 2px;
  background: var(--border);
}
.tl__progress {
  position: absolute;
  left: 7px; top: 6px;
  width: 2px;
  height: 100%;
  background: linear-gradient(var(--gold-500), var(--gold-600));
  transform-origin: top;
}

/* ---- Entry ------------------------------------------------------------ */
.tl-entry { position: relative; padding-bottom: var(--space-7); }
.tl-entry:last-child { padding-bottom: 0; }

.tl-entry__marker {
  position: absolute;
  left: calc(-1 * var(--space-7));
  top: 4px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--slate-300);
  transition: border-color var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}
.tl-entry.is-current .tl-entry__marker {
  border-color: var(--gold-500);
  background: var(--gold-500);
  box-shadow: 0 0 0 5px var(--gold-100);
}

.tl-entry__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-4);
  width: 100%;
  text-align: left;
  padding: 0;
}
.tl-entry__head:hover .tl-entry__company { color: var(--accent-strong); }

.tl-entry__period {
  font-family: var(--font-alt);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-strong);
  order: -1;
  width: 100%;
}
.tl-entry__company {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--fg);
  transition: color var(--dur) var(--ease-out);
}
.tl-entry__role {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--fg-muted);
}
.tl-entry__toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  flex-shrink: 0;
  transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.tl-entry__toggle svg { width: 16px; height: 16px; }
.tl-entry.is-open .tl-entry__toggle { transform: rotate(180deg); border-color: var(--accent); color: var(--accent-strong); }

/* ---- Expandable panel ------------------------------------------------- */
.tl-entry__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur-slow) var(--ease-out);
}
.tl-entry__panel-inner { padding-top: var(--space-4); }

.tl-entry__impact {
  font-size: var(--fs-body-sm);
  color: var(--fg);
  background: var(--gold-100);
  border-left: 2px solid var(--gold-500);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: var(--space-4);
}
.tl-entry__list { display: grid; gap: var(--space-2); }
.tl-entry__list li {
  position: relative;
  padding-left: var(--space-5);
  font-size: var(--fs-body-sm);
  color: var(--fg-muted);
  line-height: var(--lh-snug);
}
.tl-entry__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold-500);
}

@media (min-width: 640px) {
  .tl-entry__role { width: auto; }
}