:root {
  --font-statement: "Gowun Batang", "Batang", serif;
  --type-proof-title: clamp(1.4rem, 1.9vw, 1.9rem);
  --type-proof-title-mobile: clamp(1.45rem, 6vw, 1.7rem);
  --type-proof-ledger-title: clamp(1.35rem, 2.4vw, 2rem);
  --type-proof-index: clamp(2.75rem, 4vw, 4rem);
  --type-contact-lead: clamp(1.25rem, 2vw, 1.75rem);
  --type-hero-statement: clamp(1.75rem, 2.8vw, 2.85rem);
  --type-video-title: clamp(1.05rem, 1.3vw, 1.25rem);
  --type-lecture-title: clamp(1.05rem, 1.35vw, 1.3rem);
  --type-showcase-title: clamp(1.2rem, 1.7vw, 1.55rem);
  --type-contact-aside: clamp(1.05rem, 1.4vw, 1.3rem);
  --type-card-meta: clamp(.9rem, 1vw, 1rem);
  --type-book-meta: clamp(1rem, 1.15vw, 1.125rem);
  --type-lecture-meta: clamp(.875rem, .95vw, .95rem);
  --type-media-action: .76rem;
  --type-proof-creator-mobile: clamp(1.15rem, 5.1vw, 1.25rem);
  --ratio-presentation: 16 / 9;
  --ratio-video: 16 / 9;
  --carousel-gap: var(--space-6);
  --surface-contact-card: var(--paper-bright);
  --ink-contact-card: var(--ink);
  --control-size: 48px;
  --control-icon-size: 20px;
  --carousel-control-overlap: -10px;
  --carousel-control-y: clamp(118px, 14vw, 138px);
  --proof-min-height: 284px;
  --proof-ledger-row-min-height: 104px;
  --proof-ledger-index-column: 72px;
  --slide-caption-size: .68rem;
  --hero-copy-inset: clamp(var(--space-16), 8vw, 120px);
  --lecture-row-min-height: 124px;
  --lecture-layout-showcase-min: 420px;
  --lecture-ledger-index-column: 64px;
  --lecture-sticky-offset: 92px;
  --lecture-empty-min-height: 320px;
  --contact-card-inset: clamp(28px, 4vw, 52px);
  --contact-panel-card-min: 360px;
  --type-hero-statement-mobile: clamp(1.65rem, 8vw, 2.2rem);
  --proof-min-height-mobile: 240px;
  --proof-ledger-row-min-height-mobile: 88px;
  --proof-ledger-index-column-mobile: 52px;
  --proof-hero-index-column-mobile: 56px;
  --lecture-row-min-height-mobile: 112px;
  --lecture-ledger-index-column-mobile: 48px;
}

.profile-hero__copy {
  padding-top: var(--hero-copy-inset);
}

.profile-hero__name {
  margin-top: 0;
}

.profile-hero__statement {
  max-width: 17ch;
  font-family: var(--font-statement);
  font-size: var(--type-hero-statement);
  font-weight: 400;
  letter-spacing: -.035em;
  line-height: 1.45;
  text-wrap: balance;
}

.profile-hero__stats dd,
.proof-card__index,
.ledger__index,
.record-list__index,
.press-index__number,
.course-card__index,
.book-card__number {
  font-weight: 600;
  font-variant-numeric: lining-nums tabular-nums;
}

.proof-card {
  display: grid;
  min-height: var(--proof-min-height);
  grid-template-rows: auto 1fr;
}

.proof-card__index {
  margin-bottom: var(--space-6);
  font-size: var(--type-proof-index);
}

.proof-card__title {
  align-self: end;
  margin: var(--space-8) 0 0;
  font-size: var(--type-proof-title);
  line-height: 1.35;
  text-wrap: balance;
  word-break: keep-all;
}

.book-card__cover-image img,
.course-card .media-frame img {
  object-fit: contain;
}

.book-card__link,
.course-card .media-frame {
  position: relative;
}

.book-card__meta,
.course-card__meta {
  color: var(--paper-muted-readable);
  line-height: 1.55;
}

.book-card__meta {
  font-size: var(--type-book-meta);
}

.course-card__meta {
  font-size: var(--type-card-meta);
}

.media-action {
  position: absolute;
  z-index: 2;
  right: var(--space-3);
  bottom: var(--space-3);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--rule-bright);
  background: var(--ink);
  color: var(--paper-bright);
  font-family: var(--font-meta);
  font-size: var(--type-media-action);
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1;
  transition: background var(--timing-micro) ease, border-color var(--timing-micro) ease, transform var(--timing-micro) ease;
}

a:hover .media-action,
a:focus-visible .media-action {
  border-color: var(--red);
  background: var(--red);
  transform: translateY(-2px);
}

.proof-index .section-heading {
  margin-bottom: var(--space-12);
}

.proof-index .ledger__row {
  min-height: var(--proof-ledger-row-min-height);
  grid-template-columns: var(--proof-ledger-index-column) minmax(0, 1fr);
  gap: var(--space-6);
}

.proof-index .ledger__title {
  font-size: var(--type-proof-ledger-title);
  font-weight: 700;
  line-height: 1.35;
}

.proof-index #proofLedger > li:nth-child(-n + 4) .ledger__title::after {
  content: none;
}

.video-carousel {
  position: relative;
  border-top: 1px solid var(--rule);
}

.video-carousel__stage {
  position: relative;
  padding-top: var(--space-6);
}

.video-carousel__status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.video-carousel__buttons {
  position: absolute;
  z-index: 3;
  top: var(--carousel-control-y);
  right: var(--carousel-control-overlap);
  left: var(--carousel-control-overlap);
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  transform: translateY(-50%);
}

.carousel-button {
  display: grid;
  width: var(--control-size);
  height: var(--control-size);
  place-items: center;
  border: 1px solid var(--rule-bright);
  border-radius: 0;
  background: var(--ink);
  color: var(--paper-bright);
  cursor: pointer;
  pointer-events: auto;
  transition: background var(--timing-micro) ease, color var(--timing-micro) ease, transform var(--timing-micro) ease;
}

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

.carousel-button:active:not(:disabled) {
  transform: scale(.97);
}

.carousel-button:disabled {
  cursor: not-allowed;
  opacity: .35;
}

.carousel-button svg {
  width: var(--control-icon-size);
  fill: none;
  stroke: currentColor;
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 1.5;
}

.video-carousel__viewport {
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-behavior: smooth;
  scroll-snap-type: inline mandatory;
  scrollbar-color: var(--rule-bright) transparent;
  scrollbar-width: thin;
}

.video-carousel__track {
  display: flex;
  align-items: flex-start;
  gap: var(--carousel-gap);
}

.video-card {
  min-width: 0;
  flex: 0 0 calc((100% - (var(--carousel-gap) * 2)) / 3);
  scroll-snap-align: start;
}

.video-card .media-frame {
  aspect-ratio: var(--ratio-video);
  border: 1px solid var(--rule);
}

.video-card .media-frame img {
  object-fit: contain;
}


.video-card__title {
  margin-top: var(--space-4);
  font-size: var(--type-video-title);
  font-weight: 700;
  line-height: 1.55;
  text-wrap: pretty;
}

.lecture-layout {
  grid-template-columns: minmax(0, 5fr) minmax(var(--lecture-layout-showcase-min), 7fr);
}

.lecture-ledger__item {
  display: block;
  min-height: 0;
  padding: 0;
}

.lecture-ledger__button {
  display: grid;
  width: 100%;
  min-height: var(--lecture-row-min-height);
  align-items: center;
  padding: var(--space-4);
  border: 0;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  color: inherit;
  cursor: pointer;
  grid-template-columns: var(--lecture-ledger-index-column) minmax(0, 1fr);
  gap: var(--space-3) var(--space-4);
  text-align: left;
  transition: background var(--timing-standard) ease, box-shadow var(--timing-standard) ease;
}

.lecture-ledger__button:hover {
  background: var(--ink-raised);
}

.lecture-ledger__button[aria-current='true'] {
  background: var(--ink-raised);
  box-shadow: inset 3px 0 var(--red);
}

.lecture-ledger__button .lecture-ledger__title {
  font-size: var(--type-lecture-title);
  font-weight: 700;
  text-wrap: pretty;
}

.lecture-ledger__button .lecture-ledger__org {
  grid-column: 2;
  color: var(--paper-muted-readable);
  font-size: var(--type-lecture-meta);
  text-align: left;
}

.lecture-ledger__empty {
  padding: var(--space-6);
  color: var(--paper-muted-readable);
}

.lecture-showcase-wrap {
  position: sticky;
  top: var(--lecture-sticky-offset);
  align-self: start;
}

.lecture-showcase__heading {
  display: grid;
  margin-bottom: var(--space-4);
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

.lecture-showcase__heading h3 {
  max-width: 34ch;
  margin: 0;
  color: var(--paper-bright);
  font-size: var(--type-showcase-title);
  line-height: 1.4;
  text-wrap: balance;
  word-break: keep-all;
}

.lecture-showcase {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.lecture-showcase__slide {
  position: relative;
  aspect-ratio: var(--ratio-presentation);
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--ink-raised);
}

.lecture-showcase__slide:first-child {
  grid-column: 1 / -1;
}

.lecture-showcase[data-count='2'] .lecture-showcase__slide {
  grid-column: auto;
}

.lecture-showcase__slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.lecture-showcase__slide figcaption {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  padding: var(--space-1) var(--space-2);
  background: var(--ink);
  color: var(--paper-muted-readable);
  font-family: var(--font-meta);
  font-size: var(--slide-caption-size);
  letter-spacing: .08em;
}

.lecture-showcase__empty {
  display: grid;
  min-height: var(--lecture-empty-min-height);
  place-items: center;
  padding: var(--space-8);
  border: 1px solid var(--rule);
  color: var(--paper-muted-readable);
  text-align: center;
}

.contact-panel__inner {
  align-items: center;
  grid-template-columns: minmax(0, 7fr) minmax(var(--contact-panel-card-min), 5fr);
  gap: var(--space-16);
}

.contact-panel__aside {
  max-width: 26ch;
  margin: var(--space-8) 0 0;
  color: var(--paper-bright);
  font-size: var(--type-contact-aside);
  line-height: 1.65;
  word-break: keep-all;
}

.contact-panel__card {
  padding: var(--contact-card-inset);
  background: var(--surface-contact-card);
  color: var(--ink-contact-card);
}

.contact-panel__card > p {
  margin: 0 0 var(--space-8);
  color: var(--ink-contact-card);
  font-size: var(--type-contact-lead);
  font-weight: 700;
  line-height: 1.55;
  text-wrap: pretty;
  word-break: keep-all;
}

.contact-panel__card .instagram-cta--contact {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper-bright);
}

.contact-panel__card .instagram-cta--contact small {
  color: var(--red);
}

.contact-panel__card .instagram-cta--contact:hover {
  border-color: var(--red-deep);
  background: var(--red-deep);
}

.contact-panel__card .instagram-cta--contact:hover small {
  color: currentColor;
}

.contact-panel__card .contact-panel__link {
  border-color: var(--ink);
  color: var(--ink);
  font-size: var(--type-body-readable);
  text-transform: none;
}

@media (max-width: 1024px) {
  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .proof-card:nth-child(-n + 2) {
    border-bottom: 1px solid var(--rule);
  }

  .video-card {
    flex-basis: calc((100% - var(--carousel-gap)) / 2);
  }

  .lecture-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .lecture-showcase-wrap {
    position: relative;
    top: auto;
  }

  .contact-panel__inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .profile-hero__statement {
    max-width: 100%;
    font-size: var(--type-hero-statement-mobile);
  }

  .proof-index .ledger__row {
    min-height: var(--proof-ledger-row-min-height-mobile);
    grid-template-columns: var(--proof-ledger-index-column-mobile) minmax(0, 1fr);
    gap: var(--space-3);
  }

  .proof-index .ledger__title--creator {
    font-size: var(--type-proof-creator-mobile);
    letter-spacing: -.035em;
    white-space: nowrap;
  }

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

  .proof-card,
  .proof-card:nth-child(2) {
    min-height: 0;
    align-items: center;
    padding-block: var(--space-8);
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    grid-template-columns: var(--proof-hero-index-column-mobile) minmax(0, 1fr);
    grid-template-rows: auto;
    gap: var(--space-4);
  }

  .proof-card__index {
    margin-bottom: 0;
  }

  .proof-card__title {
    align-self: center;
    margin: 0;
    font-size: var(--type-proof-title-mobile);
  }

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

  .video-card {
    flex-basis: 100%;
  }

  .lecture-layout {
    display: flex;
    flex-direction: column;
  }

  .lecture-showcase-wrap {
    order: -1;
  }

  .lecture-showcase {
    display: grid;
    padding-bottom: var(--space-3);
    overflow-x: auto;
    grid-auto-columns: 88%;
    grid-auto-flow: column;
    grid-template-columns: none;
    scroll-snap-type: inline mandatory;
    scrollbar-width: thin;
  }

  .lecture-showcase__slide,
  .lecture-showcase__slide:first-child,
  .lecture-showcase[data-count='2'] .lecture-showcase__slide {
    grid-column: auto;
    scroll-snap-align: start;
  }

  .lecture-ledger__button {
    min-height: var(--lecture-row-min-height-mobile);
    padding-inline: var(--space-3);
    grid-template-columns: var(--lecture-ledger-index-column-mobile) minmax(0, 1fr);
  }

  .contact-panel__inner {
    gap: var(--space-10);
  }

  .contact-panel__card {
    padding: var(--space-6);
  }
}

@media (prefers-reduced-motion: reduce) {
  .video-carousel__viewport {
    scroll-behavior: auto;
  }

  .carousel-button,
  .lecture-ledger__button {
    transition: none;
  }
}

.video-carousel__viewport,
.topic-index,
.lecture-showcase {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.video-carousel__viewport::-webkit-scrollbar,
.topic-index::-webkit-scrollbar,
.lecture-showcase::-webkit-scrollbar {
  display: none;
}

.video-card .media-frame {
  display: block;
  overflow: hidden;
}

.video-card .media-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.profile-hero__name .profile-hero__initial {
  padding-left: 0;
}

.lecture-ledger__button .lecture-ledger__year {
  font-size: var(--type-lecture-meta);
}