/* ============================================
   COMPONENTS — Buttons, Tags, Cards
   ============================================ */

/* ---- BUTTONS ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-pill);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-surface);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(233, 69, 96, 0.3);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--primary:focus-visible {
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-surface);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn--outline:hover {
  border-color: var(--color-surface);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.btn--outline:active {
  transform: translateY(0);
}

.btn--dark {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}

.btn--dark:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn svg {
  width: 16px;
  height: 16px;
}

/* ---- SECTION HEADER ---- */

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-10);
}

.section-header .section__label {
  justify-content: center;
}

.section-header .section__label::before {
  display: none;
}

.section-header .section__description {
  margin-inline: auto;
}

/* ---- TAG ---- */

.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-pill);
  background: rgba(233, 69, 96, 0.1);
  color: var(--color-accent);
}

/* ---- DIVIDER ---- */

.divider {
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  border-radius: var(--radius-pill);
  margin-block: var(--space-5);
}

/* ---- LAB GALLERY (teaching photos) ---- */

.lab-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.lab-gallery__item {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.lab-gallery__item img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.lab-gallery__item--wide {
  grid-column: 1 / -1;
}

.lab-gallery__item .lab-gallery__item--wide img,
.lab-gallery__item--wide img {
  aspect-ratio: 21 / 9;
  height: auto;
}

.lab-gallery figcaption {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  .lab-gallery { grid-template-columns: 1fr; }
  .lab-gallery__item--wide img { aspect-ratio: 4 / 3; }
}

/* ---- SKILL CHIPS (replace percentage bars) ---- */

.skills__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: 1.3;
  color: var(--color-text-inverse);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-pill);
}

.publication__venue a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}