/* Leadership & Research page — page-specific layout only.
   Shared component styles (.site-nav, .btn, .card, .site-footer, .text-accent,
   .u-reveal) live in base.css. */

.research-main {
  min-height: 100vh;
  padding: calc(var(--space-16) * 1.5) var(--space-4) var(--space-16);
  position: relative;
}

@media (min-width: 1024px) {
  .research-main {
    padding: calc(var(--space-16) * 1.5) var(--space-8) var(--space-16);
  }
}

/* ---------- Intro header ---------- */
.research-intro {
  margin-bottom: var(--space-16);
}

.research-intro__chip {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  margin-bottom: var(--space-4);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.research-intro__title {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  line-height: 1.1;
  font-size: clamp(32px, 6vw, 48px);
  max-width: 48rem;
  margin: 0 0 var(--space-6);
}

.research-intro__subtext {
  color: var(--color-text-muted);
  max-width: 40rem;
  margin: 0 0 var(--space-6);
  line-height: 1.6;
}

/* ---------- Jump nav (in-page section links, 4-section layout) ---------- */
.research-jumpnav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
}

.research-jumpnav__link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-bottom: var(--space-1);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.research-jumpnav__link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ---------- Section heading ---------- */
.research-section {
  margin-bottom: var(--space-16);
}

.research-section__head {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.research-section__title {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0;
}

.research-section__rule {
  flex-grow: 1;
  height: 1px;
  background: var(--color-border-variant);
}

/* ---------- Grids ---------- */
.research-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 1024px) {
  .research-grid--impericus {
    grid-template-columns: repeat(12, 1fr);
  }
  .research-grid--nvidia {
    grid-template-columns: repeat(2, 1fr);
  }
  .research-grid--nasa {
    grid-template-columns: repeat(3, 1fr);
  }
}

.research-card--main {
  display: flex;
  flex-direction: column;
}

@media (min-width: 1024px) {
  .research-card--main {
    grid-column: span 8;
  }
  .research-side {
    grid-column: span 4;
  }
  .research-card--nasa {
    grid-column: span 1;
  }
  .research-card--brown {
    grid-column: span 2;
  }
}

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

/* ---------- Card component ---------- */
.research-card {
  border: 1px solid var(--color-border-variant);
  background: var(--color-surface-elevated);
  display: flex;
  flex-direction: column;
}

.research-card--main,
.research-card--brown {
  flex: 1;
}

.research-card--spaced {
  margin-top: var(--space-6);
}

.research-arch-list {
  flex-grow: 1;
  padding: var(--space-6);
}

.research-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-highest);
  border-bottom: 1px solid var(--color-border-variant);
}

.research-card__header-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.research-card__header-ref {
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0.6;
  white-space: nowrap;
}

.research-card__body {
  padding: var(--space-6);
  flex-grow: 1;
}

@media (min-width: 768px) {
  .research-card__body {
    padding: var(--space-8);
  }
}

.research-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-surface-lowest);
  border: 1px solid var(--color-border-variant);
  overflow: hidden;
  margin-bottom: var(--space-8);
}

.research-card__media-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
  transition: opacity 0.5s ease, filter 0.5s ease;
}

.research-card__media:hover .research-card__media-img {
  opacity: 1;
}

.research-card__media--grayscale .research-card__media-img {
  filter: grayscale(1);
}

.research-card__media--grayscale:hover .research-card__media-img {
  filter: grayscale(0);
}

/* Full-figure reproduction (paper plots/diagrams) — never crop data or labels */
.research-card__media--contain .research-card__media-img {
  object-fit: contain;
  opacity: 1;
  background: #fff;
}

.research-card__media-caption {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-4);
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  border: 1px solid var(--color-border-variant);
  padding: var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px;
  backdrop-filter: blur(4px);
}

.research-card__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .research-card__content {
    grid-template-columns: repeat(2, 1fr);
  }
}

.research-card__title {
  font-family: var(--font-mono);
  font-size: 22px;
  text-transform: uppercase;
  color: var(--color-text);
  margin: 0 0 var(--space-4);
}

.research-card__subtitle {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text);
  margin: 0 0 var(--space-3);
}

.research-card__text {
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0 0 var(--space-6);
}

.research-card__text--small {
  font-size: 13px;
  margin-bottom: var(--space-4);
}

.research-card__footer {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-variant);
}

.research-card__footer-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-primary);
}

/* Tags */
.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.research-tag {
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface-highest);
  border: 1px solid var(--color-border-variant);
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
}

.research-tag--nvidia {
  color: #76B900;
  border-color: #76B900;
}

/* Stat block */
.research-stat {
  padding-top: var(--space-6);
  margin-top: var(--space-6);
  border-top: 1px solid var(--color-border-variant);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@media (min-width: 768px) {
  .research-stat {
    padding-top: 0;
    margin-top: 0;
    padding-left: var(--space-8);
    border-top: none;
    border-left: 1px solid var(--color-border-variant);
  }
}

.research-stat__value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 44px;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-4);
}

.research-stat__label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.research-stat__caption {
  font-family: var(--font-mono);
  font-size: 11px;
  font-style: italic;
  color: var(--color-text-muted);
  opacity: 0.8;
  margin: 0 0 var(--space-6);
}

/* Core architecture list */
.research-arch-list__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.research-arch-list__header-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.research-arch-list__items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.research-arch-list__item {
  padding: var(--space-3);
  background: var(--color-surface-lowest);
  border: 1px solid var(--color-border-variant);
}

.research-arch-list__item-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.research-arch-list__item-desc {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  margin: 0;
}

/* Achievement panel */
.research-achievement {
  background: color-mix(in srgb, var(--color-primary) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  padding: var(--space-8) var(--space-6);
  text-align: center;
}

.research-achievement__icon {
  font-size: 36px;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.research-achievement__title {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.research-achievement__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
}

/* Visual placeholder box (NVIDIA section) */
.research-visual-box {
  position: relative;
  height: 220px;
  background: var(--color-surface-lowest);
  border: 1px solid var(--color-border-variant);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.research-visual-box__label {
  background: color-mix(in srgb, var(--color-surface) 80%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-primary);
  backdrop-filter: blur(4px);
}

/* Metrics table */
.research-metrics {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.research-metrics__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface-lowest);
  border: 1px solid var(--color-border-variant);
}

.research-metrics__label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text);
}

.research-metrics__desc {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
}

.research-metrics__value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-primary);
  white-space: nowrap;
}

/* Progress bars (Brown card) */
.research-progress {
  height: 100%;
  padding: var(--space-4);
  background: var(--color-surface-lowest);
  border: 1px solid var(--color-border-variant);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-6);
}

.research-progress__label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-primary);
}

.research-progress__bars {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.research-progress__bar {
  height: 4px;
  width: 100%;
  background: var(--color-border-variant);
}

.research-progress__bar-fill {
  height: 100%;
  background: var(--color-primary);
}

/* Checklist */
.research-checklist {
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.research-checklist__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 13px;
  color: var(--color-text);
}

.research-checklist__icon {
  color: var(--color-primary);
  font-size: 20px;
}

/* Team slot */
.research-team {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-variant);
}

.research-team__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}

.research-team__header-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.research-team__slot {
  width: 100%;
  height: 96px;
  background: var(--color-surface-lowest);
  border: 1px solid var(--color-border-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  opacity: 0.4;
  filter: grayscale(1);
  transition: opacity 0.3s ease, filter 0.3s ease;
  cursor: help;
}

.research-team__slot:hover {
  opacity: 1;
  filter: grayscale(0);
}