/* ============================================================
   EXPERIENCE PAGE
   ============================================================ */

.page-header { padding-top: calc(var(--space-16) + 80px); }
.page-header__headline { margin-top: var(--space-2); max-width: 800px; }
.page-header__sub { max-width: 560px; margin-top: var(--space-4); }

/* ── Timeline ───────────────────────────────────────────── */
.timeline__track {
  position: relative;
  padding-left: 160px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.timeline__line {
  position: absolute;
  left: 128px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-border));
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline__dot {
  position: absolute;
  left: -40px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 1px var(--color-accent);
  z-index: 1;
}

.timeline__meta {
  position: absolute;
  left: -160px;
  top: 8px;
  width: 110px;
  text-align: right;
}

.timeline__date {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.timeline__card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: box-shadow var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}

.timeline__card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(8px);
}

.timeline__card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.timeline__role {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  letter-spacing: -0.015em;
  color: var(--color-text-primary);
}

.timeline__company {
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--color-accent);
  margin-top: 2px;
}

.timeline__location {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: 2px;
}

.timeline__desc { color: var(--color-text-muted); }

.timeline__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-md);
}

.timeline__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-3);
  position: relative;
  line-height: var(--leading-relaxed);
}

.timeline__list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.75em;
  top: 2px;
}

.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

/* ── Certs ──────────────────────────────────────────────── */
.certs__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.certs__item {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: box-shadow var(--dur-base), transform var(--dur-base) var(--ease-out);
}

.certs__item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.certs__icon {
  font-size: 1.5rem;
  color: var(--color-accent);
}

.certs__item h3 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.certs__item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .timeline__track { padding-left: 0; }
  .timeline__line { display: none; }
  .timeline__dot { display: none; }
  .timeline__meta { position: static; text-align: left; width: auto; }

  .timeline__item {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }

  .timeline__date { color: var(--color-accent); }
  .timeline__card:hover { transform: none; }
  .certs__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 375px) {
  .certs__grid { grid-template-columns: 1fr; }
}