.page-about {
  --about-hero-stroke: #C6FF00;
  background: var(--c-bg);
  color: var(--c-text);
  overflow-x: hidden;
}

.page-about .about-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1.25rem;
  margin-bottom: 2rem;
  padding-top: 1rem;
}

.page-about .about-section-head__index {
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
}

.page-about .about-section-head__num {
  font-family: var(--font-data);
  font-weight: 200;
  font-size: clamp(3.25rem, 8vw, 5.5rem);
  line-height: 0.9;
  letter-spacing: -0.06em;
  color: var(--c-green);
  color: transparent;
  -webkit-text-stroke: 1.5px var(--about-hero-stroke);
}

.page-about .about-section-head__label {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.375rem;
  color: var(--c-text);
  letter-spacing: 0.01em;
}

.page-about .about-section-head__lead {
  margin-left: auto;
  color: var(--c-muted);
  font-size: 0.95rem;
  max-width: 26ch;
}

.page-about .about-hero {
  position: relative;
  padding: 6.5rem 0 3.5rem;
  background:
    radial-gradient(circle at 85% 15%, rgba(61, 90, 254, 0.28), transparent 42%),
    linear-gradient(160deg, var(--c-bg) 0%, #0B1030 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(61, 90, 254, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 90, 254, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
}

.page-about .about-hero__index {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.page-about .about-hero__big-num {
  font-family: var(--font-data);
  font-weight: 200;
  font-size: clamp(4.5rem, 12vw, 8.5rem);
  line-height: 0.8;
  letter-spacing: -0.07em;
  color: var(--c-green);
  color: transparent;
  -webkit-text-stroke: 1.5px var(--about-hero-stroke);
}

.page-about .about-hero__kicker {
  font-family: var(--font-data);
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

.page-about .breadcrumb__item {
  color: var(--c-muted);
  text-decoration: none;
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--c-green);
}

.page-about .about-hero__title {
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
  line-height: 1.02;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.page-about .about-hero__subtitle {
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--c-orange);
  font-size: clamp(1rem, 2vw, 1.375rem);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.page-about .about-hero__desc {
  color: var(--c-muted);
  max-width: 58ch;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.page-about .about-hero__stat {
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-about .about-hero__stat-num {
  font-family: var(--font-data);
  font-size: 2rem;
  color: var(--c-green);
  line-height: 1;
}

.page-about .about-hero__stat-label {
  color: var(--c-muted);
  font-size: 0.8rem;
}

.page-about .about-hero__media {
  border: 2px solid var(--c-line);
  box-shadow: 12px 12px 0 rgba(61, 90, 254, 0.18);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-data {
  position: relative;
  padding: 4rem 0;
  background: var(--c-ink);
  border-top: 2px solid var(--c-line);
  border-bottom: 2px solid var(--c-line);
}

.page-about .about-data::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 44%;
  height: 6px;
  background: linear-gradient(90deg, var(--c-green), var(--c-purple));
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.page-about .about-filter__input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.page-about .about-filter__btn {
  display: inline-block;
  padding: 0.625rem 1.25rem;
  border: 2px solid var(--c-line);
  background: transparent;
  color: var(--c-muted);
  font-family: var(--font-data);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.page-about .about-filter__btn:hover {
  border-color: var(--c-green);
  color: var(--c-green);
}

.page-about .about-filter__input:focus-visible + .about-filter__btn {
  outline: 2px solid var(--c-green);
  outline-offset: 2px;
}

.page-about:has(#filter-all:checked) .about-filter__btn[for="filter-all"],
.page-about:has(#filter-football:checked) .about-filter__btn[for="filter-football"],
.page-about:has(#filter-basketball:checked) .about-filter__btn[for="filter-basketball"],
.page-about:has(#filter-tennis:checked) .about-filter__btn[for="filter-tennis"],
.page-about:has(#filter-esports:checked) .about-filter__btn[for="filter-esports"] {
  background: var(--c-green);
  color: var(--c-ink);
  border-color: var(--c-green);
  font-weight: 700;
}

.page-about .about-data__grid {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.page-about .about-data__card {
  position: relative;
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page-about .about-data__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--c-green);
}

.page-about .about-data__tag {
  font-family: var(--font-data);
  color: var(--c-muted);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
}

.page-about .about-data__card h3 {
  font-family: var(--font-head);
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
}

.page-about .about-data__num {
  font-family: var(--font-data);
  font-size: 2.5rem;
  color: var(--c-green);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.page-about .about-data__type {
  color: var(--c-muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.page-about .about-data__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.page-about .about-data__list li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--c-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.page-about .about-data__list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--c-green);
}

.page-about:has(#filter-football:checked) .about-data__card:not(.about-data__card--football),
.page-about:has(#filter-basketball:checked) .about-data__card:not(.about-data__card--basketball),
.page-about:has(#filter-tennis:checked) .about-data__card:not(.about-data__card--tennis),
.page-about:has(#filter-esports:checked) .about-data__card:not(.about-data__card--esports) {
  display: none;
}

.page-about .about-coverage {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.page-about .about-coverage__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.25rem 0.75rem;
  border: 2px solid var(--c-line);
  background: rgba(19, 23, 54, 0.6);
}

.page-about .about-coverage__item .data-text {
  font-family: var(--font-data);
  font-size: 1.75rem;
  color: var(--c-text);
  line-height: 1;
}

.page-about .about-coverage__item span:last-child {
  color: var(--c-muted);
  font-size: 0.8rem;
  margin-top: 0.35rem;
}

.page-about .about-member {
  position: relative;
  padding: 4.5rem 0 4rem;
  background:
    radial-gradient(circle at 10% 90%, rgba(122, 46, 255, 0.16), transparent 38%),
    var(--c-bg);
}

.page-about .about-member__flow {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.page-about .about-member__step {
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.page-about .about-member__step-num {
  font-family: var(--font-data);
  font-size: 1.75rem;
  color: var(--c-orange);
  line-height: 1;
}

.page-about .about-member__step-text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
}

.page-about .about-member__arrow {
  color: var(--c-line);
  font-family: var(--font-data);
  font-size: 1.5rem;
  text-align: center;
  line-height: 1;
}

.page-about .about-perm__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.page-about .about-perm__input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.page-about .about-perm__tab {
  padding: 0.625rem 1.25rem;
  border: 2px solid var(--c-line);
  color: var(--c-muted);
  font-family: var(--font-data);
  font-size: 0.9rem;
  cursor: pointer;
}

.page-about .about-perm__input:focus-visible + .about-perm__tab {
  outline: 2px solid var(--c-green);
  outline-offset: 2px;
}

.page-about:has(#perm-basic:checked) .about-perm__tab[for="perm-basic"],
.page-about:has(#perm-detail:checked) .about-perm__tab[for="perm-detail"],
.page-about:has(#perm-full:checked) .about-perm__tab[for="perm-full"] {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-ink);
  font-weight: 700;
}

.page-about .about-perm__panel {
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.page-about .about-perm__panel h3 {
  font-family: var(--font-head);
  font-size: 1.375rem;
  margin: 0 0 0.75rem;
  color: var(--c-orange);
}

.page-about .about-perm__panel p {
  color: var(--c-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.page-about .about-perm__panel ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  margin: 0;
}

.page-about .about-perm__panel li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--c-muted);
  font-size: 0.9rem;
}

.page-about .about-perm__panel li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--c-green);
  font-size: 0.7rem;
  top: 0.2em;
}

.page-about:has(#perm-basic:checked) .about-perm__panel:not(.about-perm__panel--basic),
.page-about:has(#perm-detail:checked) .about-perm__panel:not(.about-perm__panel--detail),
.page-about:has(#perm-full:checked) .about-perm__panel:not(.about-perm__panel--full) {
  display: none;
}

.page-about .about-member__media {
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-member__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-qualification {
  position: relative;
  padding: 4.5rem 0 4rem;
  background: var(--c-ink);
  border-top: 2px solid var(--c-line);
}

.page-about .about-qualification::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--c-green), var(--c-line), var(--c-orange), var(--c-purple));
}

.page-about .about-qualification__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-qualification__info h3 {
  font-family: var(--font-head);
  font-size: 1.75rem;
  margin: 0 0 1rem;
}

.page-about .about-qualification__info > p {
  color: var(--c-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.page-about .about-qualification__list {
  margin: 1.5rem 0 1rem;
  border-top: 2px solid var(--c-line);
}

.page-about .about-qualification__row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  border-bottom: 1px solid rgba(61, 90, 254, 0.4);
  padding: 0.75rem 0;
  gap: 0.5rem;
}

.page-about .about-qualification__row dt {
  color: var(--c-muted);
  font-family: var(--font-data);
  font-size: 0.85rem;
}

.page-about .about-qualification__row dd {
  margin: 0;
  color: var(--c-text);
  font-size: 0.95rem;
  overflow-wrap: anywhere;
}

.page-about .about-qualification__note {
  color: var(--c-muted);
  font-size: 0.85rem;
  font-style: italic;
}

.page-about .about-qualification__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.page-about .about-qualification__links a {
  color: var(--c-muted);
  font-family: var(--font-data);
  font-size: 0.85rem;
  text-decoration: none;
  border-bottom: 1px solid var(--c-line);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-qualification__links a:hover {
  color: var(--c-green);
  border-color: var(--c-green);
}

.page-about .about-qualification__side {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-about .about-qualification__card {
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-about .about-qualification__card-label {
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .about-qualification__card-value {
  font-family: var(--font-data);
  font-size: 2rem;
  color: var(--c-green);
  line-height: 1.1;
}

.page-about .about-qualification__card-meta {
  color: var(--c-muted);
  font-size: 0.85rem;
}

.page-about .about-qualification__card .btn {
  align-self: flex-start;
  margin-top: 0.5rem;
}

.page-about .about-history {
  position: relative;
  padding: 4.5rem 0 4rem;
}

.page-about .about-history::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 0%, transparent 72%, rgba(122, 46, 255, 0.07) 72%, rgba(122, 46, 255, 0.07) 78%, transparent 78%);
  pointer-events: none;
}

.page-about .about-history__grid {
  position: relative;
  display: grid;
  gap: 2rem;
}

.page-about .about-history__media {
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  transform: rotate(-1.2deg);
}

.page-about .about-history__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline__node {
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  margin-bottom: 1.25rem;
}

.page-about .about-timeline__node summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.125rem 1.25rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
}

.page-about .about-timeline__node summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__node summary::marker {
  display: none;
}

.page-about .about-timeline__node summary .data-text {
  color: var(--c-green);
  font-size: 0.95rem;
}

.page-about .about-timeline__node summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-data);
  color: var(--c-orange);
  font-size: 1.5rem;
  line-height: 0.6;
  transition: transform 0.2s ease;
}

.page-about .about-timeline__node[open] summary::after {
  content: "−";
}

.page-about .about-timeline__node[open] summary {
  border-bottom: 2px solid var(--c-line);
}

.page-about .about-timeline__node:hover summary {
  border-color: var(--c-green);
}

.page-about .about-timeline__detail {
  padding: 1rem 1.25rem 1.25rem;
  color: var(--c-muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.page-about .about-indexnav {
  padding: 1rem 0 4rem;
}

.page-about .about-indexnav__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(2, 1fr);
}

.page-about .about-indexnav__card {
  display: flex;
  flex-direction: column;
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-indexnav__card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 12px 12px 0 rgba(61, 90, 254, 0.28);
  border-color: var(--c-green);
}

.page-about .about-indexnav__card-index {
  font-family: var(--font-data);
  color: var(--c-orange);
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.page-about .about-indexnav__card h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
  color: var(--c-text);
}

.page-about .about-indexnav__card p {
  color: var(--c-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0;
}

@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-data__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-coverage {
    grid-template-columns: repeat(5, 1fr);
  }

  .page-about .about-member__flow {
    flex-direction: row;
    align-items: stretch;
    gap: 0.75rem;
  }

  .page-about .about-member__step {
    flex: 1;
    flex-direction: column;
    text-align: center;
  }

  .page-about .about-member__arrow {
    display: flex;
    align-items: center;
  }

  .page-about .about-perm__panel {
    padding: 2rem;
  }

  .page-about .about-qualification__grid {
    grid-template-columns: 1.4fr 1fr;
    gap: 3rem;
  }

  .page-about .about-history__grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-indexnav__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: 9rem 1.05fr 0.8fr;
    grid-template-areas: "index main media";
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-hero__index {
    grid-area: index;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    padding-top: 1rem;
  }

  .page-about .about-hero__main {
    grid-area: main;
  }

  .page-about .about-hero__media {
    grid-area: media;
  }

  .page-about .about-data__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-member .container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    grid-template-areas:
      "head head"
      "flow media"
      "perm media";
    gap: 0 3rem;
    align-items: start;
  }

  .page-about .about-member .about-section-head {
    grid-area: head;
  }

  .page-about .about-member__flow {
    grid-area: flow;
  }

  .page-about .about-perm {
    grid-area: perm;
  }

  .page-about .about-member__media {
    grid-area: media;
    margin-top: 1.5rem;
  }
}