/* ============================================
   Components — Timeline, cards, skills, competencies
   ============================================ */

/* ---- Timeline ---- */

.timeline {
  position: relative;
  padding-left: 2rem;
}

/* Vertical line */
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 5px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--color-accent) 10%,
    var(--color-accent) 90%,
    transparent
  );
  opacity: 0.3;
  animation: timelineGlow 4s ease-in-out infinite;
}

.timeline__item {
  position: relative;
  margin-bottom: var(--space-lg);
}

.timeline__item:last-child {
  margin-bottom: 0;
}

/* Timeline dot */
.timeline__marker {
  position: absolute;
  left: calc(-2rem + 1px);
  top: 0.5rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.6;
  box-shadow: 0 0 12px rgba(139, 126, 200, 0.3);
}

.timeline__marker::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  opacity: 0;
  animation: markerPing 3s ease-out infinite;
}

@keyframes markerPing {
  0%   { transform: scale(1);   opacity: 0.4; }
  100% { transform: scale(2.5); opacity: 0; }
}

.timeline__content {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-md);
  transition: border-color 0.4s ease, transform 0.4s var(--ease-out-expo), box-shadow 0.4s ease;
}

.timeline__content:hover {
  border-color: rgba(139, 126, 200, 0.2);
  transform: translateX(4px);
  box-shadow: -4px 0 20px rgba(139, 126, 200, 0.06);
}

.timeline__header {
  margin-bottom: var(--space-sm);
}

.timeline__role {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.timeline__org {
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.timeline__meta {
  font-size: var(--fs-meta);
  font-weight: var(--fw-regular);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.timeline__details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.timeline__details li {
  font-size: var(--fs-body);
  font-weight: var(--fw-light);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  padding-left: 1rem;
  position: relative;
}

.timeline__details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 4px;
  height: 1px;
  background: var(--color-text-muted);
}

.timeline__details li strong {
  font-weight: var(--fw-medium);
  color: var(--color-text-primary);
}

/* ---- Experience Layout (timeline + competency sidebar) ---- */

.experience__layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* ---- Competency Sidebar ---- */

.competency-sidebar__title {
  font-family: var(--font-display);
  font-size: var(--fs-meta);
  font-weight: var(--fw-regular);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.competency-sidebar__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.competency-sidebar__item {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-light);
  color: var(--color-text-secondary);
  padding-left: 1rem;
  position: relative;
  transition: color 0.3s ease;
}

.competency-sidebar__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.5;
  transform: translateY(-50%);
  transition: opacity 0.3s ease;
}

/* ---- Education Cards ---- */

.edu-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.edu-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-md);
  transition: border-color 0.3s ease;
}

.edu-card:hover {
  border-color: rgba(139, 126, 200, 0.15);
}

.edu-card__degree {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.edu-card__school {
  font-size: var(--fs-body);
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.edu-card__year {
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ---- Skills Grid ---- */

.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.skill-group__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.skill-group__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--color-text-secondary);
  background: rgba(139, 126, 200, 0.08);
  border: 1px solid rgba(139, 126, 200, 0.12);
  border-radius: 4px;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease, transform 0.3s var(--ease-out-expo), box-shadow 0.3s ease;
}

.skill-tag:hover {
  background: rgba(139, 126, 200, 0.18);
  border-color: rgba(139, 126, 200, 0.3);
  color: var(--color-text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(139, 126, 200, 0.1);
}


/* ---- Additional Experience ---- */

.additional__item {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  transition: border-color 0.3s ease;
}

.additional__item:last-child {
  margin-bottom: 0;
}

.additional__item:hover {
  border-color: rgba(139, 126, 200, 0.15);
}

.additional__header {
  margin-bottom: var(--space-sm);
}

.additional__role {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.additional__org {
  font-size: var(--fs-body);
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.additional__meta {
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.additional__desc {
  font-size: var(--fs-body);
  font-weight: var(--fw-light);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
}

/* ============================================
   Responsive — Components
   ============================================ */

/* Tablet */
@media (min-width: 640px) {
  .edu-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

}

/* Desktop */
@media (min-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Timeline — wider cards with more padding */
  .timeline {
    padding-left: 3rem;
  }

  .timeline__marker {
    left: calc(-3rem + 1px);
  }

  .timeline__content {
    padding: var(--space-md) calc(var(--space-md) * 1.5);
  }

  /* Experience two-column layout */
  .experience__layout {
    flex-direction: row;
    gap: var(--space-xl);
  }

  .experience__layout > .timeline {
    flex: 1;
    min-width: 0;
  }

  .competency-sidebar {
    flex: 0 0 220px;
    position: sticky;
    top: calc(var(--space-xl) + 60px);
    align-self: flex-start;
  }
}

/* ---- Light Theme Component Overrides ---- */

[data-theme="light"] .timeline__content,
[data-theme="light"] .edu-card,
[data-theme="light"] .additional__item {
  transition: var(--theme-transition), transform 0.4s var(--ease-out-expo), box-shadow 0.4s ease;
}

[data-theme="light"] .timeline__content:hover {
  box-shadow: -4px 0 20px rgba(107, 94, 170, 0.08);
}

[data-theme="light"] .skill-tag {
  background: rgba(107, 94, 170, 0.08);
  border-color: rgba(107, 94, 170, 0.12);
}

[data-theme="light"] .skill-tag:hover {
  background: rgba(107, 94, 170, 0.15);
  border-color: rgba(107, 94, 170, 0.25);
  box-shadow: 0 4px 12px rgba(107, 94, 170, 0.1);
}

[data-theme="light"] .timeline__marker {
  background: var(--color-accent);
  box-shadow: 0 0 12px rgba(107, 94, 170, 0.3);
}