/* ==========================================================================
   Research — Dark section with publications
   ========================================================================== */

.research {
  background: var(--surface-dark);
  color: var(--on-surface-light);
  padding: var(--space-16) 0;
  overflow: hidden;
}

/* Header */
.research__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

@media (min-width: 769px) {
  .research__header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .research__statement {
    text-align: right;
  }
}

.research__title {
  font-size: var(--text-display-md);
  color: rgba(251, 246, 238, 0.9);
  text-transform: uppercase;
}

.research__statement {
  font-family: var(--font-body);
  font-size: var(--text-body-lg);
  font-style: italic;
  color: var(--outline-variant);
  max-width: 480px;
}

.research__header-note {
  display: inline-block;
  font-family: var(--font-label);
  font-size: var(--text-label-lg);
  font-weight: var(--weight-bold);
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-4);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Main grid: keywords sidebar + publications */
.research__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

/* Keywords sidebar */
.research__sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.research__keywords-box {
  padding: var(--space-8);
  border: 1px solid rgba(176, 173, 165, 0.2);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
}

.research__keywords-label {
  font-family: var(--font-label);
  font-size: var(--text-label-md);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--primary-fixed);
  margin-bottom: var(--space-6);
  display: block;
}

.research__keywords-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Publications list */
.research__publications {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

/* Single publication */
.research__pub {
  position: relative;
  padding-left: var(--space-8);
  border-left: 4px solid var(--accent);
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
  transition: border-width var(--duration-fast) var(--ease-out);
}

.research__pub:hover {
  border-left-width: 6px;
}

.research__pub-venue {
  font-family: var(--font-label);
  font-size: var(--text-label-md);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--outline-variant);
  margin-bottom: var(--space-2);
  display: block;
}

.research__pub-title {
  font-family: var(--font-headline);
  font-size: var(--text-heading-lg);
  font-weight: 600;
  line-height: 1.15;
  color: var(--on-surface-light);
  margin-bottom: var(--space-4);
  transition: color var(--duration-fast) var(--ease-out);
}

.research__pub-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.research__pub-title a:hover {
  color: var(--primary-fixed);
}

.research__pub-abstract {
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  color: rgba(225, 220, 210, 0.6);
  max-width: 640px;
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.research__pub-footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.research__pub-authors {
  font-family: var(--font-body);
  font-style: italic;
  color: var(--surface-variant);
}

.research__pub-authors .highlight {
  color: var(--primary-fixed);
  font-weight: var(--weight-medium);
  font-style: normal;
}

.research__pub-links {
  display: flex;
  gap: var(--space-3);
}

.research__pub-link {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--primary-fixed);
  color: var(--primary-fixed);
  font-family: var(--font-label);
  font-size: var(--text-label-sm);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: all var(--duration-fast) var(--ease-out);
}

.research__pub-link:hover {
  background: var(--primary-fixed);
  color: var(--on-primary-container);
}

/* Under review note */
.research__note {
  font-family: var(--font-body);
  font-style: italic;
  color: rgba(225, 220, 210, 0.4);
  margin-top: var(--space-8);
}

/* Footer callout */
.research__footer {
  border-top: 1px solid rgba(176, 173, 165, 0.1);
  padding-top: var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.research__investigating {
  font-family: var(--font-headline);
  font-size: var(--text-heading-md);
  color: rgba(225, 220, 210, 0.6);
}

.research__investigating span {
  color: var(--on-surface-light);
}

.research__view-all {
  font-family: var(--font-label);
  font-size: var(--text-label-lg);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--primary-fixed);
  border-bottom: 1px solid var(--primary-fixed);
  padding-bottom: var(--space-2);
  transition: letter-spacing var(--duration-fast) var(--ease-out);
  align-self: flex-start;
}

.research__view-all:hover {
  letter-spacing: 0.4em;
}

/* Mobile */
@media (max-width: 768px) {
  .research {
    padding: var(--space-16) 0;
  }

  .research__header {
    margin-bottom: var(--space-12);
  }

  .research__pub-title {
    font-size: var(--text-heading-md);
  }

  .research__pub-abstract {
    font-size: var(--text-body-sm);
  }

  .research__pub {
    padding-left: var(--space-6);
  }

  .research__keywords-box {
    padding: var(--space-6);
  }
}

/* Tablet and up */
@media (min-width: 769px) {
  .research__header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }

  .research__statement {
    text-align: right;
    padding-bottom: var(--space-4);
  }

  .research__grid {
    grid-template-columns: 4fr 8fr;
  }

  .research__pub-footer {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .research__footer {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .research__view-all {
    align-self: auto;
  }
}