:root {
  --research-text: #202425;
  --research-muted: #646b6d;
}

body {
  color: var(--research-text);
}

.header nav a[aria-current=page] {
  color: var(--research-text);
}

main {
  gap: 0;
}

.research-overview {
  margin-bottom: clamp(72px,8vw,128px);
}

.overview-text {
  display: grid;
  grid-template-columns: 1fr 2fr 3fr;
  gap: 32px;
  padding: 26px var(--inset) 0;
  align-items: start;
}

.section-label {
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: -.015em;
}

.overview-text h1,
.overview-description {
  font-size: clamp(17px,1.35vw,21px);
  line-height: 1.45;
  letter-spacing: -.02em;
  font-weight: 400;
}

.overview-text h1 {
  max-width: 27ch;
}

.overview-description {
  color: var(--research-muted);
  max-width: 57ch;
}

.overview-photo {
  overflow: hidden;
  border-radius: var(--radius);
  background: #080909;
  height: clamp(300px,39vw,580px);
  margin: 0;
}

.overview-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 43%;
  filter: grayscale(1);
}

body[data-opening=caption] .research-overview {
  display: flex;
  flex-direction: column;
}

body[data-opening=caption] .overview-photo {
  order: -1;
}

.research-approach {
  margin: 0 var(--inset) clamp(72px,8vw,128px);
}

.approach-overview {
  display: grid;
  grid-template-columns: 1fr 3fr 2fr;
  gap: 32px;
  align-items: start;
}

.approach-overview>p {
  font-size: clamp(17px,1.35vw,21px);
  line-height: 1.45;
  letter-spacing: -.02em;
  max-width: 56ch;
  color: var(--research-muted);
}

.method-toggle {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 20px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  color: var(--research-text);
  font-size: 15px;
  line-height: 1.4;
  min-height: 44px;
  margin-top: -10px;
  text-align: left;
}

.toggle-mark {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  background: #eff0ef;
  border-radius: 3px;
  font-size: 20px;
  font-weight: 300;
}

.method-toggle:hover .toggle-mark {
  background: #dfe3e2;
}

#method-content {
  padding-top: 44px;
  padding-left: calc((100% - 64px)/6 + 32px);
}

.method-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.method-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
  align-items: start;
}

.method-item>div {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 32px;
}

.method-item h3,
.method-item p {
  font-size: 16px;
  line-height: 1.45;
  letter-spacing: -.015em;
}

.method-item p {
  max-width: 46ch;
  color: var(--research-muted);
}

.method-marker {
  display: flex;
  gap: 3px;
  padding-top: 7px;
}

.method-marker i {
  display: block;
  width: 8px;
  height: 8px;
  background: #e5e7e6;
  flex: none;
}

.method-marker .active {
  background: #6c7779;
}

.triangle {
  display: block;
  width: 0;
  height: 0;
  border-left: 7px solid #878d90;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform 180ms ease;
}

body .footer {
  --closing-bg: #f1f3f2;
  --closing-muted: #646b6d;
}

body .footer .closing-invitation h2 {
  font-size: clamp(30px,3.2vw,46px);
}

.closing-invitation {
  margin-top: 38px;
}

body[data-divider=space] .closing-invitation {
  margin-bottom: 64px;
}

@media (max-width:900px) {
  .overview-text {
    grid-template-columns: 1fr 2fr 3fr;
    gap: 22px;
  }

  .overview-text h1,
  .overview-description {
    font-size: 16px;
  }

  .approach-overview {
    grid-template-columns: 1fr 3fr;
    gap: 22px;
  }

  .method-toggle {
    grid-column: 2;
    justify-self: start;
    margin-top: 0;
  }

  #method-content {
    padding-left: calc((100% - 22px)/4 + 22px);
    padding-top: 28px;
  }

  .method-item {
    grid-template-columns: 48px 1fr;
    gap: 18px;
  }

  .method-item>div {
    display: block;
  }

  .method-item p {
    margin-top: 6px;
  }
}

@media (max-width:600px) {
  .section-label {
    font-size: 14px;
  }

  .research-overview {
    margin-bottom: 56px;
  }

  .overview-photo {
    height: auto;
    aspect-ratio: 4/3;
  }

  .overview-text {
    grid-template-columns: 1fr;
    padding: 22px var(--inset) 0;
    gap: 18px;
  }

  .overview-text h1,
  .overview-description {
    font-size: 16px;
    line-height: 1.45;
    max-width: 40ch;
  }

  body[data-opening=caption] .overview-text h1 {
    max-width: 31ch;
  }

  .research-approach {
    margin-bottom: 56px;
  }

  .approach-overview {
    display: block;
  }

  .approach-overview>p {
    font-size: 16px;
    line-height: 1.45;
    margin-top: 22px;
  }

  .method-toggle {
    font-size: 14px;
    margin-top: 16px;
  }

  #method-content {
    padding: 28px 0 0;
  }

  .method-item {
    grid-template-columns: 48px 1fr;
    gap: 18px;
  }

  .method-item h3,
  .method-item p {
    font-size: 15px;
  }

  .method-list {
    gap: 24px;
  }

  body .footer .closing-invitation h2 {
    font-size: 30px;
  }

  .closing-invitation .contact-button {
    margin-top: 18px;
  }

  body[data-divider=space] .closing-invitation {
    margin-bottom: 38px;
  }

  .closing-base {
    padding-top: 20px;
    row-gap: 18px;
  }
}

@media (prefers-reduced-motion:reduce) {
  .triangle {
    transition: none;
  }
}

.research-approach {
  --label-width: calc((100% - 64px)/6);
  --column-gap: 32px;
  --row-space: 10px;
  --method-space: 14px;
}

.approach-overview {
  display: grid;
  grid-template-columns: var(--label-width) minmax(0,1fr);
  column-gap: var(--column-gap);
  row-gap: 8px;
  align-items: start;
}

.approach-overview>h2 {
  grid-column: 1;
  grid-row: 1;
}

.approach-overview>p {
  grid-column: 2;
  grid-row: 1;
  width: 100%;
  max-width: none;
  margin: 0;
}

.method-toggle {
  grid-column: 2;
  grid-row: 2;
  justify-self: start;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 0;
  margin: 0 0 0 -12px;
  border: 0;
  background: none;
  color: #50595a;
}

.method-toggle .toggle-mark {
  position: relative;
  display: block;
  width: 22px;
  height: 22px;
  border-radius: 3px;
  background: #eef0ef;
  font-size: 0;
  line-height: 0;
}

.method-toggle .toggle-mark::before,
.method-toggle .toggle-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  background: currentColor;
}

.method-toggle .toggle-mark::before {
  width: 10px;
  height: 1px;
}

.method-toggle .toggle-mark::after {
  width: 1px;
  height: 10px;
}

.method-toggle[aria-expanded=true] .toggle-mark::after {
  display: none;
}

.method-toggle:hover .toggle-mark {
  background: #dce1df;
  color: #202425;
}

#method-content {
  padding-top: var(--method-space);
  padding-left: calc(var(--label-width) + var(--column-gap));
}

.method-list {
  display: grid;
  gap: 0;
  list-style: none;
}

.method-marker,
.step-square {
  display: none;
}

.method-item {
  display: grid;
  grid-template-columns: 20px minmax(0,1fr);
  gap: 16px;
  align-items: baseline;
  padding: var(--row-space) 0;
}

.method-item:first-child {
  padding-top: 0;
}

.method-item:last-child {
  padding-bottom: 0;
}

.step-number {
  display: block;
  font-size: 12px;
  line-height: 1.8;
  font-variant-numeric: tabular-nums;
  color: #747d7e;
}

.method-item>div {
  display: grid;
  grid-template-columns: 138px minmax(0,1fr);
  gap: 20px;
  align-items: baseline;
}

.method-item h3,
.method-item p {
  font-size: 16px;
  line-height: 1.45;
  letter-spacing: -.015em;
  margin: 0;
}

.method-item p {
  max-width: none;
}

@media (min-width:1600px) {
  .research-approach {
    max-width: 1450px;
  }
}

@media (max-width:900px) {
  .research-approach {
    --label-width: 130px;
    --column-gap: 24px;
  }

  .method-item>div {
    grid-template-columns: 116px minmax(0,1fr);
    gap: 16px;
  }

  .method-item {
    grid-template-columns: 18px minmax(0,1fr);
    gap: 12px;
  }

  .method-item h3,
  .method-item p {
    font-size: 15px;
  }
}

@media (max-width:600px) {
  .approach-overview {
    display: grid;
    grid-template-columns: 1fr;
    row-gap: 18px;
  }

  .approach-overview>h2 {
    grid-column: 1;
    grid-row: 1;
  }

  .approach-overview>p {
    grid-column: 1;
    grid-row: 2;
    margin: 0;
  }

  .method-toggle {
    grid-column: 1;
    grid-row: 3;
    margin-top: -8px;
  }

  #method-content {
    padding-left: 0;
    padding-top: 8px;
  }

  .method-item>div {
    display: block;
  }

  .method-item p {
    margin-top: 4px;
  }

  .method-item {
    grid-template-columns: 20px 1fr;
    gap: 12px;
    align-items: baseline;
  }

  .research-approach {
    --row-space: 10px;
  }
}