/**
 * How do curated studies and their controls inherit one visual grammar?
 */

.design-page {
  background: var(--color-paper);
  color: var(--color-ink);
}

.design-page .site-header {
  color: var(--color-ink);
  border-color: var(--color-ink);
}

.design-page .site-nav a {
  color: var(--color-graphite);
}

.design-page .site-nav a:hover,
.design-page .site-nav a:focus-visible,
.design-page .site-nav a[aria-current="page"] {
  color: var(--color-ink);
}

.design-intro {
  min-height: 100svh;
  padding: calc(var(--header-height) + var(--edge)) var(--edge) var(--edge);
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: 1fr auto;
  gap: 1rem;
  border-bottom: var(--rule) solid var(--color-ink);
}

.design-intro > .eyebrow {
  grid-column: 1 / span 3;
  align-self: center;
  color: var(--color-graphite);
}

.design-intro h1 {
  grid-column: 3 / span 9;
  align-self: center;
  max-width: 9em;
  margin: 0;
  padding-top: var(--space-7);
  font-size: clamp(3.5rem, 8vw, 9rem);
  font-weight: 510;
  letter-spacing: -0.078em;
  line-height: 0.86;
}

.design-intro > p:not(.eyebrow) {
  grid-column: 8 / -1;
  align-self: end;
  margin: 0 0 var(--space-7);
  color: var(--color-graphite);
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  line-height: 1.48;
}

.design-index-line {
  grid-column: 1 / -1;
  padding-top: var(--space-2);
  display: flex;
  justify-content: space-between;
  border-top: var(--rule) solid var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.design-grid {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  border-bottom: var(--rule) solid var(--color-ink);
}

.design-card {
  min-width: 0;
  border-right: var(--rule) solid var(--color-ink);
  border-bottom: var(--rule) solid var(--color-ink);
}

.design-card:nth-child(2n) {
  border-right: 0;
}

.design-card:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.design-card-link {
  position: relative;
  min-height: 42rem;
  height: 100%;
  padding: var(--space-4);
  display: grid;
  grid-template-rows: auto minmax(17rem, 1fr) auto;
  color: var(--color-ink);
  text-decoration: none;
  overflow: hidden;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-family {
  max-width: 15rem;
  color: var(--color-graphite);
  text-align: right;
}

.card-visual {
  position: relative;
  min-height: 18rem;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.card-plane {
  position: absolute;
  width: 52%;
  height: 26%;
  border: var(--rule) solid var(--color-ink);
  background: transparent;
  transition:
    transform var(--motion-slow) var(--ease-system),
    background var(--motion-medium) ease;
}

.card-plane:first-child {
  transform: translate(-7%, -14%);
}

.card-plane:nth-child(2) {
  transform: translate(7%, 14%);
}

.card-mark {
  z-index: 2;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 5vw, 5rem);
  font-weight: 600;
  letter-spacing: -0.08em;
  mix-blend-mode: difference;
  color: var(--color-paper-bright);
}

.design-card-link:hover .card-plane:first-child,
.design-card-link:focus-visible .card-plane:first-child {
  transform: translate(-19%, -34%) rotate(-2deg);
  background: var(--color-cobalt);
}

.design-card-link:hover .card-plane:nth-child(2),
.design-card-link:focus-visible .card-plane:nth-child(2) {
  transform: translate(19%, 34%) rotate(2deg);
  background: var(--color-vermilion);
}

.card-visual[data-study="continuous-relaxation"] .card-plane {
  width: 24%;
  height: 24%;
  border-radius: 50%;
}

.card-visual[data-study="continuous-relaxation"] .card-plane:first-child {
  transform: translate(-36%, -8%);
}

.card-visual[data-study="continuous-relaxation"] .card-plane:nth-child(2) {
  transform: translate(36%, 8%);
}

.card-visual[data-study="pca-projection"] .card-plane:first-child {
  transform: translate(-7%, -14%) skewY(12deg);
}

.card-visual[data-study="pca-projection"] .card-plane:nth-child(2) {
  transform: translate(7%, 14%) skewY(-12deg);
}

.card-visual[data-study="field-duality"] .card-plane {
  width: 68%;
  height: var(--rule);
  border: 0;
  background: var(--color-ink);
}

.card-visual[data-study="field-duality"] .card-plane:first-child {
  transform: translateY(-2.2rem);
}

.card-visual[data-study="field-duality"] .card-plane:nth-child(2) {
  transform: translateY(2.2rem);
}

.card-visual[data-study="field-duality"] .card-mark {
  font-size: clamp(2rem, 4vw, 4rem);
}

.card-copy h2 {
  max-width: 12em;
  margin: 0;
  font-size: clamp(2rem, 3.5vw, 3.75rem);
  font-weight: 530;
  letter-spacing: -0.055em;
  line-height: 0.94;
}

.card-summary {
  max-width: 32rem;
  margin: var(--space-3) 0 0;
  color: var(--color-graphite);
  line-height: 1.48;
}

.card-formula {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: var(--rule) solid var(--color-rule-light);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
}

.card-arrow {
  position: absolute;
  right: var(--space-4);
  bottom: var(--space-4);
  font-size: 1.25rem;
  transition: transform var(--motion-fast) ease;
}

.design-card-link:hover .card-arrow,
.design-card-link:focus-visible .card-arrow {
  transform: translateX(0.35rem);
}

.design-principle {
  padding: clamp(6rem, 12vw, 12rem) var(--edge);
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1rem;
  background: var(--color-ground);
  color: var(--color-paper-bright);
}

.design-principle > .eyebrow {
  grid-column: 1 / span 3;
  color: var(--color-quiet);
}

.design-principle h2 {
  grid-column: 4 / -1;
  max-width: 11em;
  margin: 0;
  font-size: clamp(3rem, 6.8vw, 7.5rem);
  font-weight: 500;
  letter-spacing: -0.072em;
  line-height: 0.9;
}

.design-principle dl {
  grid-column: 7 / -1;
  margin: var(--space-7) 0 0;
}

.design-principle dl div {
  padding: 1.1rem 0;
  display: grid;
  grid-template-columns: 3rem 1fr;
  border-top: var(--rule) solid var(--color-rule-dark);
}

.design-principle dl div:last-child {
  border-bottom: var(--rule) solid var(--color-rule-dark);
}

.design-principle dt {
  color: var(--color-quiet);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.design-principle dd {
  margin: 0;
}

.design-error {
  margin: 0;
  padding: var(--space-4) var(--edge);
  background: var(--color-vermilion);
  color: var(--color-ink);
}

.study-page {
  min-width: 20rem;
  height: 100dvh;
  overflow: hidden;
  background: var(--color-ground);
  color: var(--color-paper-bright);
}

.study-header {
  position: relative;
  z-index: 20;
  height: var(--header-height);
  padding: 0 var(--edge);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  background: var(--color-paper);
  color: var(--color-ink);
  border-bottom: var(--rule) solid var(--color-ink);
}

.study-back,
.study-paging,
.study-number,
.study-metrics,
.stage-instruction,
.progress-control,
.parameter-control,
.text-button,
.transport-button,
.info-toggle,
.study-definition dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.study-back,
.study-paging a {
  text-decoration: none;
}

.study-back {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.study-back:hover,
.study-paging a:hover {
  color: var(--color-cobalt);
}

.study-heading {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
}

.study-heading h1 {
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.35rem);
  font-weight: 560;
  letter-spacing: -0.035em;
}

.study-number {
  color: var(--color-graphite);
}

.study-paging {
  justify-self: end;
  display: flex;
  gap: 0.55rem;
}

.study-workspace {
  height: calc(100dvh - var(--header-height));
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
}

.study-stage {
  position: relative;
  min-height: 0;
  overflow: hidden;
  background: var(--color-ground);
  touch-action: pan-y;
  cursor: crosshair;
}

.study-loading {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  background: var(--color-ground);
  color: var(--color-quiet);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: opacity var(--motion-medium) ease;
}

.study-loading.is-complete {
  opacity: 0;
  pointer-events: none;
}

.study-metrics {
  position: absolute;
  z-index: 4;
  top: var(--space-3);
  right: var(--edge);
  max-width: 55%;
  margin: 0;
  color: var(--color-quiet);
  text-align: right;
  white-space: pre-line;
  pointer-events: none;
}

.stage-instruction {
  position: absolute;
  z-index: 4;
  left: var(--edge);
  bottom: var(--space-3);
  max-width: 60%;
  margin: 0;
  color: var(--color-quiet);
  pointer-events: none;
}

.study-console {
  position: relative;
  z-index: 10;
  min-height: 9.5rem;
  padding: var(--space-3) var(--edge);
  display: grid;
  grid-template-columns: minmax(24rem, 1.5fr) minmax(18rem, 1fr) auto;
  gap: clamp(1rem, 3vw, 3rem);
  align-items: center;
  background: var(--color-paper);
  color: var(--color-ink);
  border-top: var(--rule) solid var(--color-ink);
}

.transport-controls {
  display: grid;
  grid-template-columns: auto minmax(12rem, 1fr) auto;
  gap: var(--space-3);
  align-items: center;
}

.transport-button,
.text-button,
.info-toggle,
.info-close {
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.transport-button {
  width: 4.8rem;
  height: 2.4rem;
  padding: 0 0.75rem;
  display: flex;
  gap: 0.45rem;
  align-items: center;
  border: var(--rule) solid var(--color-ink);
}

.transport-button:hover:not(:disabled) {
  background: var(--color-ink);
  color: var(--color-paper);
}

.transport-button:disabled {
  color: var(--color-graphite);
  cursor: not-allowed;
}

.play-symbol {
  font-size: 0.62rem;
}

.progress-control,
.parameter-control {
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(4rem, 1fr) 3.5rem;
  gap: 0.7rem;
  align-items: center;
}

.progress-control output,
.parameter-control output {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  height: 1.25rem;
  margin: 0;
  appearance: none;
  background: transparent;
  cursor: ew-resize;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: var(--rule);
  background: var(--color-ink);
}

input[type="range"]::-moz-range-track {
  height: var(--rule);
  background: var(--color-ink);
}

input[type="range"]::-webkit-slider-thumb {
  width: 0.8rem;
  height: 0.8rem;
  margin-top: -0.37rem;
  appearance: none;
  border: var(--rule) solid var(--color-ink);
  border-radius: 0;
  background: var(--color-paper);
}

input[type="range"]::-moz-range-thumb {
  width: 0.8rem;
  height: 0.8rem;
  border: var(--rule) solid var(--color-ink);
  border-radius: 0;
  background: var(--color-paper);
}

.text-button {
  padding: 0;
}

.text-button:hover {
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

.parameter-controls {
  display: grid;
  gap: 0.75rem;
}

.parameter-control {
  grid-template-columns: minmax(6rem, auto) minmax(5rem, 1fr) 3.5rem;
}

.info-toggle {
  min-width: 5.7rem;
  height: 2.4rem;
  padding: 0 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border: var(--rule) solid var(--color-ink);
}

.info-toggle:hover {
  background: var(--color-ink);
  color: var(--color-paper);
}

.study-info {
  position: fixed;
  z-index: 40;
  top: var(--header-height);
  right: 0;
  bottom: 0;
  width: min(38rem, 100%);
  padding: clamp(1.5rem, 4vw, 3.5rem);
  display: flex;
  flex-direction: column;
  background: var(--color-paper-bright);
  color: var(--color-ink);
  border-left: var(--rule) solid var(--color-ink);
  transform: translateX(100%);
  visibility: hidden;
  transition:
    transform var(--motion-medium) var(--ease-system),
    visibility 0s var(--motion-medium);
}

.study-info.is-open {
  transform: translateX(0);
  visibility: visible;
  transition-delay: 0s;
}

.info-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.info-header .eyebrow {
  color: var(--color-graphite);
}

.info-close {
  padding: 0;
  font-size: 1.6rem;
  line-height: 0.8;
}

.study-thesis {
  max-width: 14em;
  margin: auto 0;
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 510;
  letter-spacing: -0.06em;
  line-height: 0.96;
}

.study-definition {
  margin: var(--space-6) 0 0;
}

.study-definition > div {
  padding: var(--space-3) 0;
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: var(--space-3);
  border-top: var(--rule) solid var(--color-rule-light);
}

.study-definition > div:last-child {
  border-bottom: var(--rule) solid var(--color-rule-light);
}

.study-definition dt,
.study-definition dd {
  margin: 0;
}

.study-definition dd {
  color: var(--color-copy);
  font-size: 0.88rem;
  line-height: 1.45;
}

.study-definition .formula {
  font-family: var(--font-mono);
  font-size: 0.77rem;
  line-height: 1.6;
}

.study-error {
  position: fixed;
  z-index: 100;
  inset: 0;
  padding: var(--space-5);
  place-items: center;
  align-content: center;
  background: var(--color-vermilion);
  color: var(--color-ink);
  text-align: center;
}

.study-error:not([hidden]) {
  display: grid;
}

.study-error p {
  margin: 0 0 var(--space-3);
  font-size: clamp(2rem, 6vw, 5rem);
  letter-spacing: -0.06em;
}

.study-error a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .design-intro > .eyebrow {
    grid-column: 1 / span 4;
  }

  .design-intro h1 {
    grid-column: 2 / -1;
  }

  .design-intro > p:not(.eyebrow) {
    grid-column: 7 / -1;
  }

  .study-console {
    grid-template-columns: 1fr auto;
    gap: var(--space-3);
  }

  .transport-controls {
    grid-column: 1 / -1;
  }

  .parameter-controls {
    min-width: min(32rem, 70vw);
  }
}

@media (max-width: 640px) {
  .design-intro {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .design-intro > .eyebrow,
  .design-intro h1,
  .design-intro > p:not(.eyebrow) {
    grid-column: 1 / -1;
  }

  .design-intro > .eyebrow {
    align-self: end;
    margin-bottom: var(--space-5);
  }

  .design-intro h1 {
    align-self: start;
    padding-top: 0;
    font-size: clamp(3.4rem, 17vw, 6rem);
  }

  .design-intro > p:not(.eyebrow) {
    width: 82%;
    margin: 0 0 var(--space-5) auto;
  }

  .design-index-line {
    gap: var(--space-3);
  }

  .design-index-line span:last-child {
    text-align: right;
  }

  .design-grid {
    grid-template-columns: 1fr;
  }

  .design-card,
  .design-card:nth-child(2n),
  .design-card:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: var(--rule) solid var(--color-ink);
  }

  .design-card:last-child {
    border-bottom: 0;
  }

  .design-card-link {
    min-height: 34rem;
  }

  .design-principle {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .design-principle > .eyebrow,
  .design-principle h2,
  .design-principle dl {
    grid-column: 1 / -1;
  }

  .design-principle h2 {
    margin-top: var(--space-4);
  }

  .design-principle dl {
    margin-top: var(--space-6);
  }

  .study-header {
    grid-template-columns: auto 1fr auto;
    gap: 0.8rem;
  }

  .study-back span:last-child,
  .study-paging > span,
  .study-paging a {
    font-size: 0;
  }

  .study-paging a::after {
    font-size: 1rem;
  }

  .study-paging a:first-child::after {
    content: "←";
  }

  .study-paging a:last-child::after {
    content: "→";
  }

  .study-heading {
    justify-self: center;
    gap: 0.5rem;
  }

  .study-heading h1 {
    max-width: 11rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .study-workspace {
    overflow-y: auto;
    grid-template-rows: minmax(23rem, 62dvh) auto;
  }

  .study-console {
    min-height: 15rem;
    grid-template-columns: 1fr;
    align-content: start;
  }

  .transport-controls {
    grid-template-columns: auto minmax(8rem, 1fr) auto;
  }

  .parameter-controls {
    min-width: 0;
    width: 100%;
  }

  .info-toggle {
    width: 100%;
  }

  .stage-instruction {
    display: none;
  }

  .study-metrics {
    max-width: 78%;
  }

  .study-info {
    border-left: 0;
  }
}

@media (max-width: 420px) {
  .transport-controls {
    grid-template-columns: auto minmax(5rem, 1fr) auto;
    gap: var(--space-2);
  }

  .progress-control > span {
    display: none;
  }

  .progress-control {
    grid-template-columns: minmax(5rem, 1fr) 3rem;
  }

  .parameter-control {
    grid-template-columns: minmax(4.5rem, auto) minmax(4rem, 1fr) 2.8rem;
  }

  .study-thesis {
    margin-top: var(--space-7);
  }
}