/* ══════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 1.4rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.06em;
  border-radius: 2px;
  transition: transform 0.22s var(--ease-out-expo),
              box-shadow 0.22s ease,
              background 0.2s ease,
              color 0.2s ease;
  white-space: nowrap;
}

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

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(30,58,110,0.25);
  background: var(--accent-mid);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--bg-border);
}

.btn-outline:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-1px);
}

.btn-lg { padding: 0.8rem 2.2rem; font-size: var(--text-sm); }


/* ══════════════════════════════════════════
   NAVBAR
══════════════════════════════════════════ */
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
  font-style: italic;
  transition: opacity 0.2s ease;
}
.nav-logo:hover { opacity: 0.75; }

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  padding-bottom: 2px;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease-out-expo);
}

.nav-link:hover,
.nav-link.active { color: var(--accent); }

.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }

.nav-social-link {
  color: var(--text-muted);
  font-size: 1rem;
  transition: color 0.2s ease;
}
.nav-social-link:hover { color: var(--accent); }


/* ══════════════════════════════════════════
   HERO ELEMENTS
══════════════════════════════════════════ */
.hero-photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--bg-border);
  margin-bottom: 1.5rem;
  position: relative;
  flex-shrink: 0;
}

.hero-photo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-photo-placeholder {
  width: 100%;
  height: 100%;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface);
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  font-style: italic;
}

/* Show placeholder when image fails to load */
.hero-photo-img[data-loaded="false"] ~ .hero-photo-placeholder,
.hero-photo-img.hidden ~ .hero-photo-placeholder {
  display: flex;
}

.hero-badge {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  line-height: 1.45;
}
.hero-badge-lab a {
  color: var(--text-body, #1a1814);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color .18s ease, border-color .18s ease;
}
.hero-badge-lab a:hover {
  color: var(--accent, #1e3a6e);
  border-color: var(--accent, #1e3a6e);
}

.hero-social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--bg-border);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.22s var(--ease-out-expo);
}

.hero-social-icon:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
  transform: scale(1.1);
}

.canvas-hint {
  position: absolute;
  bottom: 0.75rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  opacity: 0;
  transition: opacity 0.3s ease;
  white-space: nowrap;
  pointer-events: none;
}

.hero-canvas-wrap:hover .canvas-hint { opacity: 1; }


/* ══════════════════════════════════════════
   TAGS — inline italic prose, no chips
══════════════════════════════════════════ */
.tag-row {
  display: block;
  margin-top: 0.65rem;
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.tag-row .tag {
  font-family: inherit;
  font-size: inherit;
  font-style: italic;
  color: var(--accent-mid);
  background: transparent;
  padding: 0;
  border: 0;
  border-radius: 0;
  transition: color 0.2s ease;
}

.tag-row .tag:hover { color: var(--accent); }

.tag-row .tag-warm { color: var(--warm); background: transparent; }
.tag-row .tag-warm:hover { color: var(--warm); filter: brightness(0.85); }

.tag-row .tag + .tag::before { content: ", "; color: var(--text-secondary); font-style: italic; }

.tag-row .tag-sm { font-size: 0.85rem; padding: 0; }

/* Standalone .tag outside a .tag-row (e.g. language proficiency) */
.tag {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--text-muted);
  background: transparent;
  padding: 0;
  border: 0;
  border-radius: 0;
}

.status-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0;
  padding: 0;
  border-radius: 0;
  background: transparent;
}

.status-active    { color: var(--accent); }
.status-completed { color: var(--text-muted); }
.status-published { color: var(--warm); }
.status-done      { color: var(--text-muted); }

.expertise-pill {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: 0.4rem 1.1rem;
  border: 1px solid var(--bg-border);
  border-radius: 100px;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.expertise-pill:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}


/* ══════════════════════════════════════════
   RESEARCH CARDS
══════════════════════════════════════════ */
.research-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border-light);
  border-radius: var(--card-radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, transform 0.25s var(--ease-out-expo);
}

.research-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.research-card--primary  { border-left: 3px solid var(--accent); }
.research-card--secondary { border-left: 3px solid var(--warm); }

.research-card-header { margin-bottom: 0.65rem; }
.research-card-desc   { margin-bottom: 0.5rem; flex: 1; }

.research-callout {
  background: var(--bg-surface);
  border-left: 3px solid var(--accent);
  padding: 1.25rem 1.75rem;
  margin-top: 2rem;
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
}

.research-callout p {
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--text-secondary);
  font-style: italic;
  line-height: 1.85;
}

.callout-quote-icon {
  color: var(--accent-dim);
  font-size: 1.2rem;
  opacity: 0.5;
  margin-bottom: 0.5rem;
  display: block;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent);
  margin-top: 1rem;
  letter-spacing: 0.04em;
  transition: gap 0.2s ease;
}
.card-link:hover { gap: 0.6rem; }


/* ══════════════════════════════════════════
   PROJECT CARDS
══════════════════════════════════════════ */
.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border-light);
  border-top: 2px solid transparent;
  border-radius: var(--card-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-top-color 0.25s ease, box-shadow 0.25s ease,
              transform 0.25s var(--ease-out-expo);
}

.project-card:hover {
  border-top-color: var(--accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.project-card--featured {
  border-top: 2px solid var(--accent);
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.65rem;
}

.project-card-top { flex: 1; }
.project-card-footer { margin-top: 1.25rem; display: flex; gap: 0.75rem; }

.project-link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s ease;
}
.project-link:hover { color: var(--accent); }


/* ══════════════════════════════════════════
   AWARDS
══════════════════════════════════════════ */
.award-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border-light);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: box-shadow 0.25s ease, transform 0.25s var(--ease-out-expo);
}

.award-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.award-icon-wrap {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid var(--bg-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.1rem;
}

.award-body { flex: 1; }


/* ══════════════════════════════════════════
   PUBLICATIONS
══════════════════════════════════════════ */
.scholar-notice {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-surface);
  border-left: 2px solid var(--accent);
  padding: 0.65rem 1.1rem;
  margin-bottom: 2rem;
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.scholar-notice i { color: var(--accent); font-size: 1.1rem; }

.scholar-notice a {
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  transition: opacity 0.2s ease;
}
.scholar-notice a:hover { opacity: 0.75; }

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.pub-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border-light);
  border-left: 3px solid var(--accent);
  border-radius: var(--card-radius);
  padding: 1.75rem 2rem;
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 1.5rem;
  align-items: start;
  transition: box-shadow 0.25s ease, border-left-color 0.25s ease;
}

.pub-card:hover {
  box-shadow: var(--shadow-hover);
  border-left-color: var(--warm);
}

.pub-year {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1;
  font-style: italic;
  letter-spacing: -0.01em;
  padding-top: 0.15rem;
}

.pub-body { min-width: 0; }

.pub-venue-tag {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--warm);
  background: transparent;
  padding: 0;
  border-radius: 0;
  display: inline-block;
  margin-bottom: 0.4rem;
}

.pub-authors {
  margin: 0.4rem 0 0.35rem;
  line-height: 1.55;
}
.pub-journal {
  margin-bottom: 1rem;
  line-height: 1.6;
  font-size: 0.93rem;
  color: var(--text-secondary);
}

.author-highlight {
  background: transparent;
  color: var(--accent);
  padding: 0;
  font-weight: 500;
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 1px;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-top: 0.5rem;
  align-items: center;
}

.pub-link {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--accent-mid);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0;
  border: 0;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.pub-link i { font-size: 0.82rem; }
.pub-link:hover { color: var(--accent); border-bottom-color: var(--accent-dim); }

@media (max-width: 640px) {
  .pub-card {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1.25rem 1.25rem;
  }
  .pub-year { font-size: 1.5rem; padding-top: 0; }
}

/* Expandable abstract (Google-indexable) */
.pub-abstract {
  margin: 0.85rem 0 0.5rem;
  border-left: 2px solid var(--bg-border);
  padding-left: 0;
  transition: border-color 0.2s ease;
}
.pub-abstract[open] { border-left-color: var(--accent); }
.pub-abstract > summary {
  cursor: pointer;
  display: inline-block;
  list-style: none;
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--accent-mid);
  padding: 0.25rem 0 0.25rem 0.85rem;
  user-select: none;
}
.pub-abstract > summary::-webkit-details-marker { display: none; }
.pub-abstract > summary::after {
  content: "  +";
  font-family: var(--font-mono);
  font-style: normal;
  margin-left: 0.25rem;
  color: var(--text-muted);
}
.pub-abstract[open] > summary::after { content: "  −"; color: var(--accent); }
.pub-abstract[open] > summary { color: var(--accent); }
.pub-abstract > summary:hover { color: var(--accent); }
.pub-abstract-body {
  padding: 0.5rem 0.85rem 0.5rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--text-secondary);
}
.pub-abstract-body p { margin: 0 0 0.7rem; }
.pub-abstract-body p:last-child { margin-bottom: 0; }
.pub-keywords {
  margin-top: 0.85rem !important;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--bg-border);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}
.pub-keywords strong {
  font-style: normal;
  color: var(--text-primary);
  margin-right: 0.4rem;
}

/* Cite this paper (BibTeX) */
.pub-cite {
  margin: 0.6rem 0 0;
  border-left: 2px solid var(--bg-border);
}
.pub-cite[open] { border-left-color: var(--accent); }
.pub-cite > summary {
  cursor: pointer;
  display: inline-block;
  list-style: none;
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--accent-mid);
  padding: 0.25rem 0 0.25rem 0.85rem;
  user-select: none;
}
.pub-cite > summary::-webkit-details-marker { display: none; }
.pub-cite > summary::after {
  content: "  +";
  font-family: var(--font-mono);
  font-style: normal;
  margin-left: 0.25rem;
  color: var(--text-muted);
}
.pub-cite[open] > summary::after { content: "  −"; color: var(--accent); }
.pub-cite[open] > summary { color: var(--accent); }
.pub-cite > summary:hover { color: var(--accent); }
.pub-cite-body {
  position: relative;
  margin: 0.5rem 0 0;
  padding: 0;
}
.pub-cite-body pre {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  background: var(--bg-surface);
  color: var(--text-secondary);
  padding: 1rem 1rem 1rem 0.85rem;
  border-radius: 2px;
  overflow-x: auto;
  white-space: pre;
  margin: 0;
}
.pub-cite-copy {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--bg-base);
  border: 1px solid var(--bg-border);
  border-radius: 2px;
  padding: 0.2rem 0.55rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.pub-cite-copy:hover { color: var(--accent); border-color: var(--accent-dim); }
.pub-cite-copy.copied { color: var(--success, #2a9d8f); border-color: var(--success, #2a9d8f); }


/* ══════════════════════════════════════════
   TEACHING
══════════════════════════════════════════ */
.teaching-role-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border-light);
  border-top: 2px solid var(--accent);
  border-radius: var(--card-radius);
  padding: 1.75rem;
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
}

.role-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid var(--bg-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.role-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.role-org {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-bottom: 0.1rem;
}

.role-university {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-mid);
  margin-bottom: 0.65rem;
}

.role-period {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  margin-bottom: 0.85rem;
}

.course-item {
  position: relative;
  padding: 1.25rem 1.25rem 1.25rem 1.75rem;
  border-left: 2px solid var(--bg-border-light);
  margin-bottom: 0;
  transition: background 0.25s ease;
}

.course-item::before {
  content: '';
  position: absolute;
  left: -2px;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.55s var(--ease-out-expo);
}

.course-item.visible::before  { transform: scaleY(1); }
.course-item.visible { background: var(--accent-glow2); }


/* ══════════════════════════════════════════
   CV / SKILLS
══════════════════════════════════════════ */
.skill-category {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border-light);
  border-radius: var(--card-radius);
  padding: 1.4rem;
  transition: box-shadow 0.25s ease;
}
.skill-category:hover { box-shadow: var(--shadow-card); }

.skill-cat-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 0.65rem;
}

.skill-cat-title {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
}


/* ══════════════════════════════════════════
   CONTACT
══════════════════════════════════════════ */
.contact-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border-light);
  border-radius: var(--card-radius);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: box-shadow 0.25s ease, transform 0.25s var(--ease-out-expo),
              border-color 0.25s ease;
  cursor: pointer;
}

.contact-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: var(--accent-dim);
}

.contact-card:hover .contact-icon {
  animation: icon-pulse 0.3s var(--ease-out-expo);
}

.contact-card--static { cursor: default; }
.contact-card--static:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--bg-border-light);
}

.contact-icon {
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.contact-card-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-card-value {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  word-break: break-all;
}

.contact-copy {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 0.5rem;
}


/* ══════════════════════════════════════════
   BACK TO TOP
══════════════════════════════════════════ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s var(--ease-out-expo), box-shadow 0.3s ease;
  box-shadow: 0 4px 16px rgba(30,58,110,0.2);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  box-shadow: 0 6px 20px rgba(30,58,110,0.35);
  transform: translateY(-2px);
}