/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard);
}

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

.btn-primary {
  background: var(--color-accent);
  color: #16070a;
}

.btn-primary:hover {
  background: var(--color-accent-soft);
  color: #16070a;
  box-shadow: 0 8px 24px var(--color-accent-glow);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- Card ---------- */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: transform var(--duration-base) var(--ease-standard),
    box-shadow var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px var(--color-accent-dim);
}

.card-title {
  font-size: 1.15rem;
  margin-bottom: var(--space-2);
}

/* ---------- Timeline (job/education/honors/talks/teaching/societies) ---------- */
.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: var(--space-6);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--color-accent) 0%,
    var(--color-border) 100%
  );
  transform-origin: top;
  transform: scaleY(0);
}

.timeline.is-drawn::before {
  transform: scaleY(1);
  transition: transform 1.2s var(--ease-standard);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-7);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-6) + 1px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-bg);
}

.timeline-dates {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-accent-soft);
  margin-bottom: var(--space-1);
}

.timeline-item h4 {
  margin-bottom: var(--space-1);
  font-size: 1.05rem;
}

.timeline-item .where {
  color: var(--color-text);
  font-style: normal;
}

.timeline-item .loc {
  color: var(--color-text-faint);
  font-size: var(--fs-small);
  margin-bottom: var(--space-2);
}

.timeline-item p {
  font-size: 0.925rem;
  margin-bottom: var(--space-2);
}

.timeline-item p.links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 0.85rem;
}

.timeline-item p.links a {
  color: var(--color-text-faint);
  white-space: nowrap;
}

.timeline-item p.links a:hover {
  color: var(--color-accent);
}

/* ---------- Credential card ----------
   One unified component for every "employer / institution + role + dates" entry in the
   About section (Current Work, Job Experience, Education, Honors) — replaces what used to
   be three different treatments (plain cards, a job-only card, and a dotted timeline) so the
   whole section reads as one consistent system instead of three competing patterns. */
.credential-card {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

/* Circular avatar-style badge, identical footprint whether it holds a real logo image or a
   fallback icon — this is what keeps entries with/without a known logo looking intentional
   side by side instead of some looking "complete" and others looking like broken images. */
.credential-badge {
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--color-border);
}

img.credential-badge {
  object-fit: contain;
  padding: 7px;
}

span.credential-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-dim);
  border-color: transparent;
  color: var(--color-accent);
  font-size: 1.1rem;
}

.credential-dates {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-accent-soft);
  margin-bottom: var(--space-1);
}

.credential-card h4 {
  font-size: 1rem;
  margin-bottom: var(--space-1);
}

.credential-card .where {
  color: var(--color-text);
}

.credential-card .loc {
  color: var(--color-text-faint);
  font-size: var(--fs-small);
  margin-bottom: var(--space-1);
}

.credential-card .desc {
  font-size: 0.875rem;
  margin-top: var(--space-2);
  margin-bottom: 0;
}

.subsection-title {
  text-align: center;
  margin-bottom: var(--space-6);
}

.credential-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ---------- About section ---------- */
.hero-note {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-top: var(--space-6);
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

.hero-note i {
  color: var(--color-accent);
  margin-top: 2px;
}

.about-intro {
  max-width: 65ch;
  margin: 0 auto var(--space-9);
  text-align: center;
}

.about-intro .mantra {
  font-style: italic;
  color: var(--color-text);
  margin-top: var(--space-5);
  margin-bottom: 0;
}

/* Two-column timeline layout (job/education columns side by side) */
.timeline-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (max-width: 900px) {
  .timeline-cols {
    grid-template-columns: 1fr;
  }
}

/* One chronological list, presented down two columns on wider screens. */
.timeline.societies-timeline { max-width: none; }
@media (min-width: 901px) {
  .timeline.societies-timeline { display: grid; grid-template-rows: repeat(3, auto); grid-auto-flow: column; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: var(--space-8); padding-left: 0; }
  .societies-timeline > .timeline-item { margin-left: var(--space-6); min-width: 0; }
  .societies-timeline > .timeline-item:nth-child(3) { padding-bottom: 0; }
  .societies-timeline::after { content: ''; position: absolute; top: 0; bottom: 0; left: calc(50% + var(--space-8) / 2 + 6px); width: 2px; background: linear-gradient(180deg,var(--color-accent),var(--color-border)); pointer-events: none; }
}

/* ---------- Chips / tags ---------- */
.reviewer-list { list-style: none; margin: 0; padding: 0; }
.reviewer-list > li { break-inside: avoid; margin-bottom: var(--space-2); }
.reviewer-conferences { text-align: center; }
.course-list { list-style: none; margin: 0; padding: 0; }
.teaching-institute { display: flex; align-items: center; justify-content: space-between; gap: 16px 28px; margin-bottom: var(--space-5); }
.teaching-institute h3 { display: flex; align-items: center; gap: 14px; margin: 0; min-width: 0; font-weight: 700; }
.teaching-institute h3 img { flex: 0 0 48px; width: 48px; height: 48px; padding: 6px; object-fit: contain; background: #fff; border: 1px solid var(--color-border); border-radius: 10px; }
.teaching-institute .institute-location { display: flex; align-items: baseline; gap: 8px; margin: 0; font: 400 .75rem/1.6 var(--font-mono); color: var(--color-text-muted); }
@media (max-width: 900px) {
  .teaching-institute { align-items: flex-start; flex-direction: column; gap: 8px; }
  .teaching-institute .institute-location { padding-left: 62px; }
}
.course-list > li { break-inside: avoid; margin-bottom: var(--space-3); }
#teaching .course-title { display: block; margin-bottom: var(--space-1); }
#teaching .course-details { font-size: .85rem; line-height: 1.7; color: var(--color-text-faint); }
#teaching .course-details a { display: inline-block; white-space: nowrap; }
@media (min-width: 901px) {
  .reviewer-list, .course-list { columns: 2; column-gap: var(--space-6); }
}

.chip-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.chip {
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-bg-elevated);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: box-shadow var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
  cursor: default;
}

.chip:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
  box-shadow: 0 0 16px var(--color-accent-glow);
}

.chip-group {
  margin-bottom: var(--space-6);
}

.chip-group h4 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
  text-align: center;
}

/* filter pills (Publications / Gallery) */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-7);
}

.filter-pill {
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
}

.filter-pill[aria-pressed="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #16070a;
}

/* ---------- Stat tiles (Facts & Stats) ---------- */
.stat-tile {
  text-align: center;
  padding: var(--space-5);
}

.stat-icon {
  font-size: 2rem;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.stat-icon img {
  height: 40px;
  margin: 0 auto var(--space-3);
  filter: drop-shadow(0 0 8px var(--color-accent-glow));
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  color: var(--color-text-faint);
  font-size: var(--fs-small);
  margin-top: var(--space-1);
}

/* Passport-inspired stamps for the countries called home. */
.countries-home { margin: 0 auto var(--space-8); padding: 28px 0; max-width: 760px; text-align: center; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.countries-home h3 { margin-bottom: 28px; }
.country-stamps { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 20px; list-style: none; padding: 0; margin: 0; }
.country-stamps li { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.country-stamp { display: flex; flex-direction: column; align-items: center; justify-content: center; width: 88px; height: 88px; border: 1px dashed var(--color-accent); outline: 1px solid var(--color-border-strong); outline-offset: -6px; border-radius: 50%; color: var(--color-accent); background: rgba(240,244,238,.65); font: 500 1.7rem/1.2 var(--font-mono); letter-spacing: .08em; transform: rotate(-8deg); }
.country-stamp > span { font-size: .55rem; margin-top: 5px; letter-spacing: .16em; }
.country-stamps li:nth-child(even) .country-stamp { transform: rotate(7deg); }
.country-stamps strong { display: flex; align-items: center; gap: 8px; font-size: .9rem; font-weight: 500; }
.country-flag { width: 26px; height: 18px; object-fit: contain; flex-shrink: 0; }
@media (max-width: 480px) {
  .country-stamps { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px 16px; }
}
/* ---------- Research: collaborators + projects ---------- */
#research .grid-2 > * {
  min-width: 0;
}

.collab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: var(--space-5);
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
}

.collab {
  text-align: center;
  cursor: default;
}

.collab img {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-border-strong);
  margin: 0 auto var(--space-2);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.collab:hover img {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.collab-name {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.collab-profile { display: block; color: inherit; border-radius: 6px; }
.collab-profile:hover .collab-name,
.collab-profile:focus-visible .collab-name { color: var(--color-accent); text-decoration: underline; }

.collab-name a {
  color: inherit;
}

.collab-name a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.collab-role {
  font-size: 0.7rem;
  color: var(--color-text-faint);
  display: none;
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  cursor: pointer;
}

.project-card img {
  width: 100%;
  border-radius: var(--radius-sm);
  aspect-ratio: 16/9;
  object-fit: cover;
}

.project-details {
  display: none;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.project-card.is-open .project-details {
  display: block;
}

.project-details ul {
  font-size: 0.875rem;
}

.project-details li {
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}


/* ---------- Publications ---------- */
.pub-item {
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border);
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: baseline;
}

.pub-title {
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.pub-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px var(--space-2);
  border-radius: 4px;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  white-space: nowrap;
}

.pub-authors {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.pub-authors .self {
  color: var(--color-text);
  font-weight: 600;
}

.pub-venue {
  font-size: 0.85rem;
  color: var(--color-text-faint);
  white-space: pre-line;
}

.pub-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-3);
  font-size: 1rem;
}

.pub-links a {
  color: var(--color-text-faint);
}

.pub-links a:hover {
  color: var(--color-accent);
}

.pub-cite { border: 0; padding: 0; background: none; color: var(--color-text-faint); font: inherit; cursor: pointer; }
.pub-cite:hover { color: var(--color-accent); }
.citation-dialog { width: min(640px, calc(100% - 32px)); max-height: calc(100dvh - 40px); margin: auto; padding: clamp(20px,4vw,32px); overflow: auto; border: 1px solid var(--color-border); border-radius: 12px; background: var(--color-bg); color: var(--color-text); box-shadow: 0 24px 90px #102c2440; }
.citation-dialog::backdrop { background: rgba(18,35,31,.48); backdrop-filter: blur(4px); }
.citation-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.citation-header h2 { font-size: 1.4rem; }
.citation-close { flex-shrink: 0; width: 36px; height: 36px; border: 0; border-radius: 50%; background: transparent; color: inherit; font-size: 1.6rem; cursor: pointer; }
#citation-title { margin: 12px 0 24px; font-size: .9rem; color: var(--color-text-muted); }
.citation-dialog label { display: block; margin-bottom: 8px; font-size: .85rem; }
.citation-dialog select { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--color-border); border-radius: 6px; background: #fff; color: inherit; font: inherit; }
.citation-output { margin-top: 20px; padding: 20px; border: 1px solid var(--color-border); border-radius: 6px; background: #fff; line-height: 1.7; overflow-wrap: anywhere; user-select: text; }
.citation-output:empty { display: none; }
.citation-output.is-bibtex { white-space: pre-wrap; font: .8rem/1.6 var(--font-mono); }
.citation-status { min-height: 1.5em; margin: 12px 0; font-size: .8rem; color: var(--color-text-muted); }
.citation-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; font-size: .85rem; }
.citation-actions button { min-height: 42px; padding: 9px 16px; border: 1px solid var(--color-border); border-radius: 6px; background: #fff; color: inherit; font: inherit; cursor: pointer; }
.citation-actions .citation-copy { background: var(--color-accent); color: #fff; }
.citation-actions button:disabled { opacity: .5; cursor: wait; }
@media print { .citation-dialog { display: none; } }

.pub-abstract {
  display: none;
  margin-top: var(--space-3);
  font-size: 0.9rem;
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
}

.pub-item.is-open .pub-abstract {
  display: block;
}

.pub-toggle {
  background: none;
  border: none;
  color: var(--color-text-faint);
  cursor: pointer;
  font-size: 0.9rem;
}

.pub-toggle:hover {
  color: var(--color-accent);
}

.pub-empty {
  text-align: center;
  color: var(--color-text-faint);
  padding: var(--space-8) 0;
}

/* ---------- Gallery ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-standard);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--space-3);
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.75), transparent);
  font-size: 0.85rem;
  color: #fff;
  transform: translateY(100%);
  transition: transform var(--duration-fast) var(--ease-standard);
}

.gallery-item:hover .gallery-caption {
  transform: translateY(0);
}

#lightbox {
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  padding: 0;
  max-width: min(90vw, 900px);
}

#lightbox::backdrop {
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
}

.lightbox-inner {
  position: relative;
}

.lightbox-inner img {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  background: #000;
}

.lightbox-caption {
  padding: var(--space-4);
  text-align: center;
  color: var(--color-text-muted);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 1.1rem;
}

.lightbox-close {
  top: var(--space-3);
  right: var(--space-3);
}

.lightbox-prev {
  top: 50%;
  left: var(--space-3);
  transform: translateY(-50%);
}

.lightbox-next {
  top: 50%;
  right: var(--space-3);
  transform: translateY(-50%);
}

/* ---------- Forms (Contact) ---------- */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.field {
  margin-bottom: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.field input,
.field textarea {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.field input:focus,
.field textarea:focus {
  border-color: var(--color-accent);
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

#contact-status {
  margin-top: var(--space-4);
  font-size: 0.9rem;
}

#contact-status[data-state="success"] {
  color: var(--color-success);
}

#contact-status[data-state="error"] {
  color: var(--color-accent);
}

#contact-status[data-state="sending"] {
  color: var(--color-text-muted);
}

/* Google permits hiding the floating badge when the visible contact-form disclosure remains. */
.grecaptcha-badge {
  visibility: hidden;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-links li a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
}

.contact-links li a:hover {
  color: var(--color-accent);
}

@media (max-width: 700px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}