body[data-page-id="lab"] {
  --lab-accent: color-mix(in srgb, var(--world-accent) 68%, var(--world-ink));
  --lab-line: color-mix(in srgb, var(--world-ink) 14%, transparent);
  --lab-line-strong: color-mix(in srgb, var(--world-ink) 24%, transparent);
  --lab-wash: color-mix(in srgb, var(--world-accent) 7%, transparent);
  background:
    radial-gradient(circle at 78% 8%, color-mix(in srgb, var(--world-accent) 9%, transparent), transparent 30rem),
    var(--world-bg);
}

.lab-page {
  padding-bottom: clamp(2rem, 5vw, 5rem);
}

.lab-intro {
  position: relative;
  display: grid;
  min-height: clamp(38rem, 82svh, 52rem);
  padding-block: clamp(8rem, 16vh, 12rem) clamp(4.5rem, 9vw, 8rem);
  border-bottom: 1px solid var(--lab-line);
  grid-template-columns: minmax(0, 1.06fr) minmax(20rem, 0.94fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
}

.lab-intro__copy {
  position: relative;
  z-index: 1;
}

.lab-intro .kicker {
  margin-bottom: clamp(1.5rem, 4vw, 2.8rem);
}

.lab-intro .world-title {
  max-width: 7.5ch;
  margin: 0;
  font-size: clamp(4.7rem, 10.2vw, 9.5rem);
  line-height: 0.79;
  letter-spacing: -0.075em;
}

.lab-intro .world-title > span {
  display: block;
}

.lab-intro__deck {
  max-width: 34rem;
  margin: clamp(2rem, 4vw, 3.2rem) 0 0;
  color: var(--world-muted);
  font: clamp(1rem, 1.35vw, 1.18rem)/1.72 var(--font-serif);
}

.lab-intro__count {
  display: flex;
  margin: clamp(2.4rem, 5vw, 4rem) 0 0;
  align-items: center;
  gap: 0.55rem;
  color: var(--world-faint);
  font: 0.63rem/1.3 var(--font-mono);
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

.lab-intro__count strong {
  color: var(--lab-accent);
  font-size: 0.8rem;
  font-weight: 500;
}

.lab-intro__count i {
  width: 2.25rem;
  height: 1px;
  margin-inline: 0.35rem;
  background: var(--lab-line-strong);
}

.lab-field {
  position: relative;
  min-height: clamp(23rem, 38vw, 34rem);
  overflow: hidden;
  border-block: 1px solid var(--lab-line);
  background:
    linear-gradient(90deg, transparent 0 12%, var(--lab-line) 12% calc(12% + 1px), transparent calc(12% + 1px) 100%),
    repeating-linear-gradient(90deg, transparent 0 calc(14.285% - 1px), color-mix(in srgb, var(--world-ink) 6%, transparent) calc(14.285% - 1px) 14.285%);
}

.lab-field::before,
.lab-field::after {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--lab-accent) 30%, transparent);
  border-radius: 50%;
  content: "";
}

.lab-field::before {
  top: 15%;
  right: -24%;
  width: 76%;
  aspect-ratio: 1;
}

.lab-field::after {
  right: -5%;
  bottom: 14%;
  width: 33%;
  aspect-ratio: 1;
  box-shadow: 0 0 0 2rem color-mix(in srgb, var(--lab-accent) 3%, transparent), 0 0 0 5rem color-mix(in srgb, var(--lab-accent) 2%, transparent);
}

.lab-field__axis {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  height: 1px;
  background: var(--lab-line-strong);
}

.lab-field__wave {
  position: absolute;
  top: 12%;
  right: 9%;
  bottom: 12%;
  left: 9%;
  background:
    radial-gradient(ellipse 34% 18% at 15% 50%, transparent 92%, color-mix(in srgb, var(--lab-accent) 58%, transparent) 94% 96%, transparent 98%),
    radial-gradient(ellipse 34% 25% at 43% 50%, transparent 92%, color-mix(in srgb, var(--lab-accent) 42%, transparent) 94% 96%, transparent 98%),
    radial-gradient(ellipse 34% 32% at 72% 50%, transparent 92%, color-mix(in srgb, var(--lab-accent) 28%, transparent) 94% 96%, transparent 98%);
  opacity: 0.9;
}

.lab-field__ticks {
  position: absolute;
  inset: 13% 8%;
}

.lab-field__ticks i {
  position: absolute;
  width: 0.42rem;
  height: 0.42rem;
  border: 1px solid var(--lab-accent);
  border-radius: 50%;
  background: var(--world-bg);
  box-shadow: 0 0 0 0.25rem color-mix(in srgb, var(--lab-accent) 7%, transparent);
}

.lab-field__ticks i:nth-child(1) { top: 63%; left: 5%; }
.lab-field__ticks i:nth-child(2) { top: 26%; left: 19%; }
.lab-field__ticks i:nth-child(3) { top: 67%; left: 33%; }
.lab-field__ticks i:nth-child(4) { top: 21%; left: 47%; }
.lab-field__ticks i:nth-child(5) { top: 70%; left: 61%; }
.lab-field__ticks i:nth-child(6) { top: 30%; left: 75%; }
.lab-field__ticks i:nth-child(7) { top: 55%; left: 89%; }

.lab-field small {
  position: absolute;
  right: 0.25rem;
  bottom: 0.55rem;
  color: var(--world-faint);
  font: 0.58rem/1 var(--font-mono);
  letter-spacing: 0.08em;
}

.lab-sequence,
.lab-studies {
  padding-block: clamp(5rem, 10vw, 9rem);
}

.lab-sequence {
  border-bottom: 1px solid var(--lab-line);
}

.lab-section-head {
  display: grid;
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
  grid-template-columns: minmax(8rem, 0.42fr) minmax(0, 1fr) minmax(16rem, 0.46fr);
  align-items: end;
  gap: clamp(1.5rem, 4vw, 4rem);
}

.lab-section-head .section-label {
  align-self: start;
  padding-top: 0.45rem;
}

.lab-section-head h2 {
  margin: 0;
  font: 400 clamp(3.1rem, 6.5vw, 6.6rem)/0.86 var(--font-display);
  letter-spacing: -0.065em;
  text-wrap: balance;
}

.lab-section-head > p:last-child {
  max-width: 24rem;
  margin: 0;
  color: var(--world-muted);
  font: 0.96rem/1.65 var(--font-serif);
}

.lab-sequence__works {
  display: grid;
  min-height: clamp(32rem, 52vw, 45rem);
  overflow: hidden;
  border: 1px solid var(--lab-line);
  border-radius: var(--radius-panel);
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  background: var(--world-bg-soft);
}

.lab-chapter {
  position: relative;
  display: grid;
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 2.35rem);
  grid-template-columns: 2rem minmax(0, 1fr) auto;
  grid-template-rows: minmax(12rem, 1fr) auto;
  gap: 1.2rem;
  color: var(--world-ink);
  text-decoration: none;
}

.lab-chapter + .lab-chapter {
  border-left: 1px solid var(--lab-line);
}

.lab-chapter__visual,
.lab-chapter__media {
  position: absolute;
  inset: 0 0 42%;
  overflow: hidden;
}

.lab-chapter__visual {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--lab-accent) 8%, transparent), transparent 62%),
    repeating-linear-gradient(90deg, transparent 0 calc(14.285% - 1px), color-mix(in srgb, var(--world-ink) 8%, transparent) calc(14.285% - 1px) 14.285%);
}

.lab-chapter__visual::before {
  position: absolute;
  top: 50%;
  right: 8%;
  left: 8%;
  height: 1px;
  background: var(--lab-line-strong);
  content: "";
}

.lab-chapter__visual i {
  position: absolute;
  top: 50%;
  width: 0.45rem;
  height: 0.45rem;
  border: 1px solid var(--lab-accent);
  border-radius: 50%;
  background: var(--world-bg-soft);
  transform: translate(-50%, -50%);
  transition: transform var(--motion-normal) var(--ease-miao), background-color var(--motion-fast) ease;
}

.lab-chapter__visual i:nth-child(1) { left: 12%; }
.lab-chapter__visual i:nth-child(2) { left: 24%; }
.lab-chapter__visual i:nth-child(3) { left: 36%; }
.lab-chapter__visual i:nth-child(4) { left: 48%; }
.lab-chapter__visual i:nth-child(5) { left: 60%; }
.lab-chapter__visual i:nth-child(6) { left: 72%; }
.lab-chapter__visual i:nth-child(7) { left: 84%; }

.lab-chapter__visual b {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20%;
  aspect-ratio: 1;
  border: 1px solid color-mix(in srgb, var(--lab-accent) 54%, transparent);
  border-radius: 50%;
  box-shadow: 0 0 0 1.5rem color-mix(in srgb, var(--lab-accent) 3%, transparent), 0 0 0 3.25rem color-mix(in srgb, var(--lab-accent) 2%, transparent);
  transform: translate(-50%, -50%);
}

.lab-chapter__media::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgb(5 9 14 / 4%), rgb(5 9 14 / 76%));
  content: "";
}

.lab-chapter__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.05);
  transition: transform var(--motion-slow) var(--ease-miao), filter var(--motion-normal) ease;
}

.lab-chapter__index,
.lab-chapter__copy,
.lab-chapter > .line-arrow {
  position: relative;
  z-index: 1;
  grid-row: 2;
}

.lab-chapter__index,
.lab-study__index,
.lab-chapter__copy small,
.lab-study__copy small {
  color: var(--world-faint);
  font: 0.61rem/1.35 var(--font-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.lab-chapter__copy {
  display: grid;
  align-self: end;
  gap: 0.9rem;
}

.lab-chapter__copy strong {
  max-width: 13ch;
  font: 400 clamp(2.5rem, 4.8vw, 5.1rem)/0.88 var(--font-display);
  letter-spacing: -0.058em;
}

.lab-chapter__copy > span {
  max-width: 35rem;
  color: var(--world-muted);
  font: 0.9rem/1.65 var(--font-serif);
}

.lab-chapter > .line-arrow {
  align-self: end;
  width: 2.3rem;
  margin-bottom: 0.2rem;
}

.lab-chapter--gravity {
  color: rgb(241 245 247 / 96%);
  background: #0b1119;
}

.lab-chapter--gravity .lab-chapter__index,
.lab-chapter--gravity .lab-chapter__copy small {
  color: rgb(231 239 246 / 52%);
}

.lab-chapter--gravity .lab-chapter__copy > span {
  color: rgb(235 240 244 / 72%);
}

.lab-section-head--compact {
  grid-template-columns: minmax(8rem, 0.42fr) minmax(0, 1fr);
}

.lab-section-head--compact h2 {
  font-size: clamp(3rem, 5.6vw, 5.4rem);
}

.lab-studies__list {
  display: grid;
  border-top: 1px solid var(--lab-line);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lab-study {
  position: relative;
  display: grid;
  min-height: clamp(18rem, 28vw, 25rem);
  padding: clamp(1.25rem, 2.8vw, 2.25rem);
  border-bottom: 1px solid var(--lab-line);
  grid-template-columns: 2rem minmax(0, 1fr) auto;
  align-items: end;
  gap: 1.2rem;
  color: var(--world-ink);
  text-decoration: none;
}

.lab-study + .lab-study {
  border-left: 1px solid var(--lab-line);
}

.lab-study__art {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: clamp(7rem, 12vw, 11rem);
  aspect-ratio: 1;
  opacity: 0.72;
}

.lab-study--night .lab-study__art i {
  position: absolute;
  top: 5%;
  right: 12%;
  width: 42%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: color-mix(in srgb, var(--lab-accent) 20%, transparent);
  box-shadow: inset 0.35rem -0.2rem color-mix(in srgb, var(--world-bg) 86%, transparent);
}

.lab-study--night .lab-study__art b {
  position: absolute;
  right: 0;
  bottom: 17%;
  left: 0;
  height: 28%;
  border-block: 1px solid var(--lab-line-strong);
  background: repeating-linear-gradient(180deg, transparent 0 0.45rem, color-mix(in srgb, var(--lab-accent) 18%, transparent) 0.45rem calc(0.45rem + 1px));
  transform: skewY(-5deg);
}

.lab-study--research .lab-study__art {
  background:
    linear-gradient(35deg, transparent 46%, var(--lab-line-strong) 46% calc(46% + 1px), transparent calc(46% + 1px)),
    linear-gradient(145deg, transparent 52%, var(--lab-line-strong) 52% calc(52% + 1px), transparent calc(52% + 1px));
}

.lab-study--research .lab-study__art i,
.lab-study--research .lab-study__art b {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--lab-accent) 38%, transparent);
  content: "";
}

.lab-study--research .lab-study__art i {
  inset: 14% 30% 30% 14%;
}

.lab-study--research .lab-study__art b {
  inset: 35% 10% 10% 36%;
}

.lab-study__copy {
  display: grid;
  align-self: end;
  gap: 0.72rem;
}

.lab-study__copy strong {
  max-width: 18ch;
  font: 400 clamp(2rem, 3.4vw, 3.55rem)/0.94 var(--font-display);
  letter-spacing: -0.05em;
}

.lab-study__copy > span {
  max-width: 33rem;
  color: var(--world-muted);
  font: 0.86rem/1.62 var(--font-serif);
}

.lab-study > .line-arrow {
  width: 2.2rem;
  margin-bottom: 0.2rem;
}

body[data-page-id="lab"] .relation-trail {
  margin-top: clamp(1rem, 3vw, 2rem);
  border-top: 1px solid var(--lab-line);
}

body[data-page-id="lab"] .relation-list {
  background: transparent;
  box-shadow: none;
}

body[data-page-id="lab"] .relation-list a {
  background: color-mix(in srgb, var(--world-bg-soft) 86%, transparent);
}

@media (hover: hover) and (pointer: fine) {
  .lab-chapter,
  .lab-study {
    transition: background-color var(--motion-normal) ease;
  }

  .lab-chapter--lenz:hover,
  .lab-study:hover {
    background: var(--lab-wash);
  }

  .lab-chapter--lenz:hover .lab-chapter__visual i:nth-child(odd) {
    background: var(--lab-accent);
    transform: translate(-50%, -50%) scale(1.28);
  }

  .lab-chapter--gravity:hover .lab-chapter__media img {
    filter: saturate(0.92) contrast(1.05);
    transform: scale(1.025);
  }
}

.lab-chapter:focus-visible,
.lab-study:focus-visible {
  z-index: 2;
  outline: 2px solid var(--lab-accent);
  outline-offset: -3px;
}

@media (max-width: 62rem) {
  .lab-intro {
    min-height: auto;
    grid-template-columns: minmax(0, 1fr) minmax(16rem, 0.65fr);
    gap: 2.5rem;
  }

  .lab-intro .world-title {
    font-size: clamp(4.2rem, 10vw, 7.5rem);
  }

  .lab-section-head {
    grid-template-columns: minmax(7rem, 0.3fr) minmax(0, 1fr);
  }

  .lab-section-head > p:last-child {
    grid-column: 2;
  }

  .lab-sequence__works {
    min-height: 36rem;
  }
}

@media (max-width: 48rem) {
  .lab-intro {
    padding-top: 7.2rem;
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  .lab-intro .world-title {
    max-width: 8ch;
    font-size: clamp(4rem, 20vw, 6.5rem);
  }

  .lab-intro__deck {
    max-width: 30rem;
    font-size: 1rem;
  }

  .lab-intro__count {
    flex-wrap: wrap;
  }

  .lab-field {
    min-height: 16rem;
  }

  .lab-section-head,
  .lab-section-head--compact {
    grid-template-columns: 1fr;
    gap: 1.3rem;
  }

  .lab-section-head > p:last-child {
    grid-column: 1;
  }

  .lab-section-head h2,
  .lab-section-head--compact h2 {
    font-size: clamp(3.2rem, 16vw, 5rem);
  }

  .lab-sequence__works {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .lab-chapter {
    min-height: 32rem;
  }

  .lab-chapter + .lab-chapter {
    border-top: 1px solid var(--lab-line);
    border-left: 0;
  }

  .lab-chapter__copy strong {
    font-size: clamp(2.8rem, 13vw, 4.2rem);
  }

  .lab-studies__list {
    grid-template-columns: 1fr;
  }

  .lab-study + .lab-study {
    border-left: 0;
  }

  .lab-study {
    min-height: 22rem;
  }

  .lab-study__art {
    top: 1.5rem;
    right: 1.5rem;
  }

  .lab-study__copy strong {
    font-size: clamp(2.35rem, 11vw, 3.4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .lab-chapter,
  .lab-study,
  .lab-chapter__visual i,
  .lab-chapter__media img {
    transition: none !important;
  }
}