/* ===== Expandable cards: hover glow + dim rest, click to expand ===== */

/* ----- Shared expandable details (collapsed by default) ----- */
.expandable__details,
.card__details {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-slow) var(--ease-out);
}

.expandable.is-expanded .expandable__details,
.expandable.is-expanded .card__details {
  grid-template-rows: 1fr;
}

.expandable__details-inner,
.card__details-inner {
  overflow: hidden;
  min-height: 0;
}

.card__details ul,
.project-card__details ul {
  margin: 0 0 var(--space-md);
  padding-left: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.card__details li,
.project-card__details li {
  margin-bottom: var(--space-xs);
}

/* Thapar coursework: 3-column layout (webkit prefix for Safari/GitHub Pages) */
.coursework-cols {
  -webkit-column-count: 3;
  column-count: 3;
  -webkit-column-gap: var(--space-lg);
  column-gap: var(--space-lg);
}

@media (max-width: 640px) {
  .coursework-cols {
    -webkit-column-count: 2;
    column-count: 2;
  }
}

@media (max-width: 400px) {
  .coursework-cols {
    -webkit-column-count: 1;
    column-count: 1;
  }
}

.card__details-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Footer: hint + link at bottom right of tile */
.timeline__card.expandable__card,
.project-card .project-card__body {
  display: flex;
  flex-direction: column;
}

.expandable__footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-md);
  margin-top: auto;
  padding-top: var(--space-md);
}

/* Hint: "Click to expand" / "Click to collapse" */
.expandable__hint {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

.expandable.is-expanded .expandable__hint {
  color: var(--accent);
}

/* Project card: link on left inside expanded details only (hidden when collapsed) */
.project-card__details .project-card__links {
  margin-top: var(--space-md);
}

/* When collapsed: summary grey; when expanded: summary white */
.card__summary,
.project-card__summary {
  margin: 0 0 0;
  color: var(--text-secondary);
  transition: color var(--duration-normal) var(--ease-out);
}

.expandable.is-expanded .card__summary,
.expandable.is-expanded .project-card__summary {
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

/* ----- Hover: glow focused card, dim others ----- */
.timeline[data-focus-section] .timeline__item {
  transition: opacity var(--duration-normal) var(--ease-out);
}

.timeline[data-focus-section]:has(.timeline__item:hover) .timeline__item:not(:hover),
.timeline[data-focus-section]:has(.timeline__item.is-expanded) .timeline__item:not(.is-expanded) {
  opacity: 0.35;
}

.timeline__card {
  cursor: pointer;
}

.timeline__item:hover .timeline__card,
.timeline__item.is-expanded .timeline__card {
  border-color: rgba(34, 211, 200, 0.35);
  box-shadow: 0 0 0 1px rgba(34, 211, 200, 0.2), 0 0 32px var(--accent-glow);
}

.timeline__item:hover .timeline__marker,
.timeline__item.is-expanded .timeline__marker {
  box-shadow: 0 0 0 4px var(--bg-secondary), 0 0 20px var(--accent-glow);
  transform: scale(1.15);
}

/* Projects: same hover/expand dim + glow */
.grid--projects[data-focus-section] .project-card {
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal),
              box-shadow var(--duration-normal);
}

.grid--projects[data-focus-section]:has(.project-card:hover) .project-card:not(:hover),
.grid--projects[data-focus-section]:has(.project-card.is-expanded) .project-card:not(.is-expanded) {
  opacity: 0.35;
}

.grid--projects[data-focus-section] .project-card:hover,
.grid--projects[data-focus-section] .project-card.is-expanded {
  border-color: rgba(34, 211, 200, 0.35);
  box-shadow: 0 0 0 1px rgba(34, 211, 200, 0.2), 0 0 32px var(--accent-glow);
}

.project-card:hover {
  transform: translateY(-2px);
}

/* Expanded project: becomes primary focus - large, centered, on top */
.grid--projects .project-card.is-expanded {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  transform-origin: center center;
  width: min(90vw, 720px);
  max-height: 85vh;
  z-index: 100;
  overflow-y: auto;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border);
  animation: project-expand-in var(--duration-slow) var(--ease-out) forwards;
}

@keyframes project-expand-in {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.94);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.projects-section-wrap:has(.project-card.is-expanded) .projects-backdrop {
  display: block;
}