/* Research portfolio — self-contained page layout. */

.research-page main,
.research-page .site-footer { margin: 0; }
.research-page main { padding: 0; }

/* Introduction and controls */
.research-page .research-browser {
  width: 100%;
  margin: 0;
  padding: clamp(72px, 8vw, 128px) max(4.5vw, 48px) clamp(48px, 5vw, 78px);
  background: var(--off-white);
  color: var(--deep-green);
}

.research-page .research-browser-intro {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(420px, 1.2fr);
  gap: clamp(56px, 9vw, 170px);
  align-items: start;
  padding-bottom: clamp(38px, 4vw, 60px);
}

.research-page .research-browser-eyebrow,
.research-page .research-search > span:first-child,
.research-page .research-topic-filter legend {
  margin: 0 0 14px;
  color: var(--deep-green);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.17em;
  line-height: 1.2;
  text-transform: uppercase;
}

.research-page .research-browser-intro h2 {
  margin: 0;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(3rem, 5.6vw, 6.3rem);
  font-weight: 400;
  letter-spacing: -0.065em;
  line-height: 0.92;
}

.research-page .research-browser-copy {
  width: 100%;
  max-width: 720px;
  justify-self: end;
  display: grid;
  gap: 20px;
}

.research-page .research-browser-copy p {
  margin: 0;
  color: var(--slate);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(1rem, 1.3vw, 1.22rem);
  line-height: 1.58;
}

.research-page .research-browser-copy p:last-child {
  padding-top: 17px;
  border-top: 1px solid rgba(31, 58, 61, 0.24);
  color: var(--deep-green);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.45;
  text-transform: uppercase;
}

/* Category selector */
.research-page .project-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0 0 clamp(42px, 4vw, 62px);
  border-top: 1px solid rgba(31, 58, 61, 0.3);
  border-left: 1px solid rgba(31, 58, 61, 0.3);
}

.research-page .project-tab {
  min-width: 0;
  min-height: 118px;
  padding: clamp(20px, 2.1vw, 30px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border: 0;
  border-right: 1px solid rgba(31, 58, 61, 0.3);
  border-bottom: 1px solid rgba(31, 58, 61, 0.3);
  border-radius: 0;
  background: #e4ebe8;
  color: var(--deep-green);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 220ms ease, color 220ms ease;
}

.research-page .project-tab:hover,
.research-page .project-tab:focus-visible { background: #d6e1dc; }

.research-page .project-tab:focus-visible {
  position: relative;
  z-index: 2;
  outline: 2px solid var(--deep-green);
  outline-offset: -2px;
}

.research-page .project-tab.active[data-target="international-projects"] {
  background: var(--deep-green);
  color: var(--off-white);
}

.research-page .project-tab.active[data-target="contracts"] {
  background: #cbdcd5;
  color: var(--deep-green);
}

.research-page .project-tab-copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 7px;
}

.research-page .project-tab-label {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: clamp(1.08rem, 1.6vw, 1.45rem);
  font-weight: 500;
  line-height: 1.15;
}

.research-page .project-tab-copy small {
  color: currentColor;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(0.7rem, 0.85vw, 0.82rem);
  line-height: 1.4;
  opacity: 0.74;
}

.research-page .project-tab-count {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 0;
  color: currentColor;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 0.76rem;
  font-weight: 600;
}

/* Search and filters */
.research-page .research-tools {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  align-items: end;
  gap: clamp(44px, 7vw, 120px);
  padding: 0 0 clamp(34px, 3.5vw, 52px);
  border-bottom: 1px solid rgba(31, 58, 61, 0.22);
}

.research-page .research-search,
.research-page .research-topic-filter {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.research-page .research-search { display: block; }
.research-page .research-search-field { position: relative; display: block; }

.research-page .research-search input {
  width: 100%;
  min-height: 48px;
  padding: 11px 42px 11px 0;
  border: 0;
  border-bottom: 1px solid rgba(31, 58, 61, 0.44);
  border-radius: 0;
  outline: 0;
  background: transparent;
  color: var(--deep-green);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 0.94rem;
}

.research-page .research-search input::placeholder { color: rgba(31, 58, 61, 0.58); }
.research-page .research-search input:focus { border-color: var(--deep-green); box-shadow: 0 2px 0 var(--deep-green); }

.research-page .research-search-icon {
  position: absolute;
  right: 8px;
  top: 50%;
  width: 15px;
  height: 15px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  transform: translateY(-62%);
  pointer-events: none;
}

.research-page .research-search-icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 6px;
  height: 1.5px;
  background: currentColor;
  transform: rotate(45deg);
  transform-origin: left center;
}

.research-page .research-topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid rgba(31, 58, 61, 0.28);
  border-left: 1px solid rgba(31, 58, 61, 0.28);
}

.research-page .research-topic,
.research-page .research-clear {
  border-radius: 0;
  color: var(--deep-green);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 500;
  cursor: pointer;
}

.research-page .research-topic {
  min-height: 42px;
  padding: 10px 15px;
  border: 0;
  border-right: 1px solid rgba(31, 58, 61, 0.28);
  border-bottom: 1px solid rgba(31, 58, 61, 0.28);
  background: transparent;
  font-size: 0.76rem;
}

.research-page .research-topic:hover,
.research-page .research-topic:focus-visible { background: #d7e1dd; }

.research-page .research-topic:focus-visible,
.research-page .research-clear:focus-visible { outline: 2px solid var(--deep-green); outline-offset: -2px; }

.research-page .research-topic.active { background: var(--deep-green); color: var(--off-white); }

.research-page .research-results-meta {
  min-height: 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 22px;
}

.research-page .research-results-meta p { margin: 0; }
.research-page #research-results-count { color: var(--deep-green); font-size: 0.9rem; font-weight: 600; }
.research-page .project-helper { color: var(--slate); font-size: 0.78rem; }

.research-page .research-clear {
  margin-left: auto;
  padding: 8px 11px;
  border: 1px solid rgba(31, 58, 61, 0.34);
  background: transparent;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.research-page .research-clear:hover { background: var(--deep-green); color: var(--off-white); }
.research-page .research-clear[hidden] { display: none; }

/* Projects and contracts */
.research-page .projects {
  width: 100%;
  margin: 0;
  padding: 0 max(4.5vw, 48px) clamp(82px, 9vw, 144px);
  border-radius: 0;
  background: var(--off-white);
}

.research-page .project-panels,
.research-page .project-panel { width: 100%; margin: 0; }
.research-page .project-panel[hidden] { display: none; }

.research-page .project-list {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  counter-reset: research-card;
  border-top: 1px solid rgba(31, 58, 61, 0.24);
  border-left: 1px solid rgba(31, 58, 61, 0.24);
}

.research-page .project-item {
  position: relative;
  isolation: isolate;
  min-width: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  counter-increment: research-card;
  border: 0;
  border-right: 1px solid rgba(31, 58, 61, 0.24);
  border-bottom: 1px solid rgba(31, 58, 61, 0.24);
  border-radius: 0;
  background: #f8f8f4;
  color: var(--deep-green);
  text-decoration: none;
  transform: none;
  transition: color 250ms ease, transform 250ms ease;
}

.research-page .project-item[hidden] { display: none; }

.research-page .project-item::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--deep-green);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 300ms cubic-bezier(0.65, 0, 0.35, 1);
  pointer-events: none;
}

.research-page #contracts .project-item { background: #e8efec; }
.research-page #contracts .project-item::before { background: #cbdcd5; }
.research-page .project-item > * { position: relative; z-index: 1; }

.research-page .project-item:hover,
.research-page .project-item:focus-visible { color: var(--off-white); transform: translateY(4px); }

.research-page #contracts .project-item:hover,
.research-page #contracts .project-item:focus-visible { color: var(--deep-green); }

.research-page .project-item:hover::before,
.research-page .project-item:focus-visible::before { transform: scaleY(1); }

.research-page .project-item:focus-visible {
  z-index: 2;
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.research-page .project-thumb-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-bottom: 1px solid rgba(31, 58, 61, 0.16);
  background: #fff;
}

.research-page .project-thumb-wrap::before {
  content: counter(research-card, decimal-leading-zero);
  position: absolute;
  top: 16px;
  right: 17px;
  z-index: 2;
  color: rgba(31, 58, 61, 0.5);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  line-height: 1;
}

.research-page .project-thumb {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  transition: transform 280ms cubic-bezier(0.65, 0, 0.35, 1);
}

.research-page .project-item:hover .project-thumb,
.research-page .project-item:focus-visible .project-thumb { transform: scale(0.96); }

.research-page .contract-item .project-thumb-wrap {
  padding: clamp(26px, 2.8vw, 46px);
  background: #dde8e3;
}

.research-page .contract-figure {
  width: 60%;
  height: 60%;
  overflow: visible;
  color: var(--deep-green);
  transition: color 250ms ease, transform 250ms ease;
}

.research-page .contract-figure__line,
.research-page .contract-figure__fine,
.research-page .contract-figure__accent-line {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.research-page .contract-figure__line { stroke-width: 4; }
.research-page .contract-figure__fine { stroke-width: 2; opacity: 0.48; }
.research-page .contract-figure__accent-line { stroke: var(--accent); stroke-width: 5; }
.research-page .contract-figure__accent-fill { fill: var(--accent); }
.research-page .contract-figure__dash { stroke-dasharray: 4 8; }

.research-page .contract-item:hover .contract-figure,
.research-page .contract-item:focus-visible .contract-figure { transform: scale(0.96); }

.research-page .project-item h3 {
  min-width: 0;
  display: flex;
  margin: 0;
  padding: clamp(22px, 2vw, 30px);
  font: inherit;
}

.research-page .project-card-title {
  width: 100%;
  min-height: 194px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 11px;
}

.research-page .project-card-title strong {
  color: currentColor;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: clamp(1.02rem, 1.15vw, 1.25rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.research-page .project-item:hover .project-card-title strong,
.research-page .project-item:focus-visible .project-card-title strong { color: var(--accent); }

.research-page #contracts .project-item:hover .project-card-title strong,
.research-page #contracts .project-item:focus-visible .project-card-title strong { color: var(--deep-green); }

.research-page .project-card-line {
  width: 42px;
  height: 1px;
  margin: 2px 0 3px;
  background: currentColor;
}

.research-page .project-card-definition {
  color: currentColor;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 0.88rem;
  font-weight: 400;
  line-height: 1.48;
  opacity: 0.86;
}

.research-page .project-card-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: auto;
  padding-top: 16px;
}

.research-page .project-card-topic {
  padding: 4px 7px;
  border: 1px solid rgba(31, 58, 61, 0.25);
  border-radius: 0;
  color: currentColor;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 0.62rem;
  font-weight: 500;
  line-height: 1.2;
}

.research-page .project-card-action {
  width: 100%;
  margin-top: 8px;
  padding-top: 14px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid rgba(31, 58, 61, 0.22);
  color: currentColor;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
}

.research-page .project-item:hover .project-card-topic,
.research-page .project-item:focus-visible .project-card-topic,
.research-page .project-item:hover .project-card-action,
.research-page .project-item:focus-visible .project-card-action { border-color: rgba(245, 244, 235, 0.34); }

.research-page #contracts .project-item:hover .project-card-topic,
.research-page #contracts .project-item:focus-visible .project-card-topic,
.research-page #contracts .project-item:hover .project-card-action,
.research-page #contracts .project-item:focus-visible .project-card-action { border-color: rgba(31, 58, 61, 0.28); }

@media (max-width: 1280px) {
  .research-page .project-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .research-page .research-browser,
  .research-page .projects { padding-left: 6vw; padding-right: 6vw; }

  .research-page .research-browser-intro,
  .research-page .research-tools { grid-template-columns: 1fr; gap: 40px; }

  .research-page .research-browser-copy { max-width: 700px; justify-self: start; }
  .research-page .project-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .research-page .research-browser { padding-top: 62px; padding-bottom: 38px; }
  .research-page .research-browser-intro { gap: 30px; padding-bottom: 34px; }
  .research-page .research-browser-intro h2 { font-size: clamp(2.7rem, 14vw, 4.2rem); }
  .research-page .project-tabs { grid-template-columns: 1fr; margin-bottom: 40px; }
  .research-page .project-tab { min-height: 98px; padding: 18px; }
  .research-page .research-tools { gap: 34px; }
  .research-page .research-topic-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .research-page .research-topic { width: 100%; text-align: left; }
  .research-page .research-results-meta { align-items: flex-start; }
  .research-page .research-clear { width: 100%; margin: 8px 0 0; }
  .research-page .project-list { grid-template-columns: 1fr; }
  .research-page .project-thumb-wrap { aspect-ratio: 16 / 9; }
  .research-page .contract-item .project-thumb-wrap { padding: 28px; }
  .research-page .project-card-title { min-height: 0; }
}