.page-about {
  --about-edge-width: 2px;
  --about-card-shadow: 6px 6px 0 0 rgba(24, 38, 24, 0.9);
  --about-lime-shadow: 4px 4px 0 0 rgba(163, 230, 53, 0.22);
  --about-card-radius: 10px;
  background: var(--color-night);
  color: var(--color-paper);
  overflow-x: clip;
}

.page-about .page-shell {
  position: relative;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  min-height: 96vh;
  display: flex;
  align-items: flex-end;
  border-bottom: 2px solid var(--color-lime);
  overflow: hidden;
  background: var(--color-night);
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(58, 63, 58, 0.32) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 63, 58, 0.32) 1px, transparent 1px);
  background-size: 44px 44px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(13, 15, 13, 0.2) 0%, rgba(13, 15, 13, 0.9) 90%),
    linear-gradient(115deg, rgba(163, 230, 53, 0.16) 0%, transparent 45%);
}

.page-about .about-hero-inner {
  width: 100%;
  padding-top: clamp(4rem, 10vw, 7rem);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
  position: relative;
  z-index: 2;
}

.page-about .about-kicker {
  margin: 1.2rem 0 0.6rem;
  color: var(--color-lime);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-title {
  margin: 0;
  max-width: 13em;
  font-size: clamp(2.8rem, 8vw, 6.4rem);
  line-height: 0.96;
  text-transform: uppercase;
  color: var(--color-paper);
}

.page-about .about-hero-lead {
  margin-top: 1.4rem;
  max-width: 38rem;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--color-fog);
  line-height: 1.7;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 2.5rem;
  border-top: 2px solid var(--color-edge);
  padding-top: 1.2rem;
  max-width: 720px;
}

.page-about .about-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--color-paper);
  letter-spacing: -0.02em;
  line-height: 1;
}

.page-about .about-stat-note {
  font-size: 0.8rem;
  color: var(--color-fog);
  letter-spacing: 0.04em;
}

@media (min-width: 720px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== Mission ===== */
.page-about .about-mission-section {
  position: relative;
  padding: clamp(4rem, 8vw, 6rem) 0;
  border-bottom: 2px solid var(--color-edge);
  background:
    linear-gradient(135deg, rgba(163, 230, 53, 0.05) 0%, transparent 40%),
    var(--color-night);
}

.page-about .about-mission-grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-mission-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 4rem;
  }
}

.page-about .about-manifesto {
  font-size: clamp(1.35rem, 2.4vw, 2.2rem);
  line-height: 1.5;
  font-weight: 700;
  color: var(--color-paper);
  letter-spacing: -0.01em;
  border-left: 4px solid var(--color-lime);
  padding-left: 1rem;
}

@media (min-width: 900px) {
  .page-about .about-manifesto {
    padding-left: 1.5rem;
  }
}

.page-about .about-mission-side {
  border: 2px solid var(--color-edge);
  padding: 1.2rem 1.2rem 1.4rem;
  background: var(--color-moss);
  box-shadow: var(--shadow-card);
}

.page-about .about-mission-side > p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-fog);
}

.page-about .about-mission-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-mission-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
  border-bottom: 1px solid var(--color-edge);
  padding-bottom: 0.8rem;
  font-size: 0.9rem;
  color: var(--color-fog);
}

.page-about .about-mission-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-mission-list strong {
  font-family: var(--font-mono);
  color: var(--color-lime);
  font-size: 1.05rem;
  white-space: nowrap;
}

/* ===== Data base ===== */
.page-about .about-data-section {
  background: var(--color-moss);
  border-bottom: 2px solid var(--color-edge);
  padding: clamp(3rem, 7vw, 5rem) 0;
  position: relative;
}

.page-about .about-data-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40%;
  height: 6px;
  background: var(--color-lime);
}

.page-about .about-data-heading,
.page-about .about-version-heading,
.page-about .about-team-heading,
.page-about .about-more-title {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  margin: 0.25em 0 0.6em;
  text-transform: uppercase;
  color: var(--color-paper);
}

.page-about .about-data-intro {
  max-width: 42rem;
  line-height: 1.7;
  color: var(--color-fog);
}

.page-about .about-data-filterbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 1.8rem 0 1.4rem;
}

.page-about .about-data-layout {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 960px) {
  .page-about .about-data-layout {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: 2rem;
    align-items: start;
  }
}

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 640px) {
  .page-about .about-data-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-data-card_wide {
    grid-column: span 2;
  }
}

.page-about .about-data-card {
  position: relative;
  background: var(--color-night);
  border: 2px solid var(--color-edge);
  padding: 1.2rem 1.2rem 1.4rem;
  transition: border-color var(--time-fast) ease, transform var(--time-mid) ease;
}

.page-about .about-data-card:hover,
.page-about .about-data-card:focus-within {
  border-color: var(--color-lime);
  transform: translateY(-3px);
}

.page-about .about-data-sport-label {
  display: inline-block;
  padding: 2px 10px;
  background: var(--color-lime);
  color: var(--color-night);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-data-num {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1;
  margin: 0.7rem 0 0.3rem;
  color: var(--color-paper);
}

.page-about .about-data-unit {
  color: var(--color-fog);
  font-size: 0.85rem;
}

.page-about .about-data-desc {
  color: var(--color-fog);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0.9rem 0 0;
}

.page-about .about-data-side {
  display: grid;
  gap: 14px;
}

.page-about .about-data-map-frame {
  margin: 0;
  border: 2px solid var(--color-edge);
  background: var(--color-night);
  padding: 8px;
  box-shadow: var(--about-lime-shadow);
  position: relative;
}

.page-about .about-data-map {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--color-edge);
}

.page-about .about-data-map-note {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-fog);
}

.page-about .about-data-refresh {
  border: 2px solid var(--color-edge);
  background: var(--color-night);
  padding: 1.1rem;
  border-left: 6px solid var(--color-yellow);
}

.page-about .about-data-refresh p {
  margin: 0.6rem 0 0;
  font-size: 0.9rem;
  color: var(--color-fog);
  line-height: 1.6;
}

/* ===== Version timeline ===== */
.page-about .about-version-section {
  padding: clamp(3rem, 6vw, 5rem) 0;
  position: relative;
}

.page-about .about-version-section::before {
  content: "2.4.8";
  position: absolute;
  top: 3rem;
  right: 2rem;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(4rem, 14vw, 12rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(163, 230, 53, 0.18);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-version-head {
  max-width: 40rem;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
  position: relative;
  z-index: 1;
}

.page-about .about-version-head > p {
  color: var(--color-fog);
  line-height: 1.7;
}

.page-about .about-version-total {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border: 2px solid var(--color-lime);
  box-shadow: var(--about-lime-shadow);
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-lime);
  background: var(--color-night);
}

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

.page-about .about-timeline-rail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 16px;
  width: 3px;
  height: auto;
  z-index: 0;
}

@media (min-width: 920px) {
  .page-about .about-timeline-rail {
    left: 50%;
    margin-left: -1px;
  }
}

.page-about .about-timeline-item {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  align-items: start;
}

.page-about .about-timeline-node {
  grid-column: 1;
  grid-row: 1;
  justify-self: center;
  align-self: start;
  margin-top: 1.2em;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-lime);
  box-shadow: 0 0 0 6px var(--color-night), 0 0 0 7px var(--color-edge);
  transition: transform var(--time-mid) ease, box-shadow var(--time-mid) ease;
}

.page-about .about-timeline-item:hover .about-timeline-node,
.page-about .about-timeline-item:focus-within .about-timeline-node {
  transform: scale(1.35);
  box-shadow: 0 0 0 9px rgba(163, 230, 53, 0.28), 0 0 0 2px var(--color-lime);
}

.page-about .about-version-card {
  grid-column: 2;
  grid-row: 1;
  background: var(--color-moss);
  border: 2px solid var(--color-edge);
  padding: 1.3rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--time-mid) ease, border-color var(--time-fast) ease;
}

.page-about .about-version-card:hover,
.page-about .about-version-card:focus-within {
  transform: translateX(4px);
  border-color: var(--color-lime);
}

.page-about .about-version-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-night);
  background: var(--color-lime);
  padding: 2px 10px;
  font-size: 0.78rem;
}

.page-about .about-version-name {
  margin: 0.7rem 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.6rem;
  text-transform: uppercase;
  color: var(--color-paper);
}

.page-about .about-version-desc {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--color-fog);
  margin: 0;
}

.page-about .about-version-icon {
  width: 120px;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  margin-top: 1rem;
  border: 2px solid var(--color-edge);
  background: var(--color-night);
}

@media (min-width: 920px) {
  .page-about .about-timeline-item {
    grid-template-columns: 1fr 80px 1fr;
  }

  .page-about .about-timeline-node {
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
  }

  .page-about .about-version-card {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-timeline-item_left .about-version-card {
    justify-self: end;
  }

  .page-about .about-timeline-item_right .about-version-card {
    grid-column: 3;
    grid-row: 1;
    justify-self: start;
  }

  .page-about .about-version-card:hover,
  .page-about .about-version-card:focus-within {
    transform: translateY(-4px);
  }
}

/* ===== Team ===== */
.page-about .about-team-section {
  position: relative;
  padding: clamp(3rem, 7vw, 5rem) 0;
  border-top: 2px solid var(--color-edge);
  background: var(--color-night);
  overflow: hidden;
}

.page-about .about-team-section::before {
  content: "120";
  position: absolute;
  bottom: 2rem;
  left: 1rem;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(5rem, 16vw, 13rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(58, 63, 58, 0.35);
  pointer-events: none;
}

.page-about .about-team-section::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(58, 63, 58, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 63, 58, 0.15) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-about .about-team-head {
  position: relative;
  margin-bottom: 2.5rem;
  z-index: 1;
}

.page-about .about-team-head p {
  max-width: 42rem;
  color: var(--color-fog);
  line-height: 1.7;
}

.page-about .about-team-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 641px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .about-team-card_total {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-team-card_eng {
    grid-column: 2;
    grid-row: 1;
    margin-top: 2rem;
  }

  .page-about .about-team-card_analyst {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: end;
    width: calc(50% - 12px);
    margin-top: -2.6rem;
    z-index: 2;
  }
}

.page-about .about-team-card {
  position: relative;
  z-index: 1;
  border: 2px solid var(--color-edge);
  background: var(--color-night);
  padding: 1.4rem 1.6rem 1.6rem;
  box-shadow: var(--shadow-card);
}

.page-about .about-team-card_total {
  border-top: 8px solid var(--color-lime);
}

.page-about .about-team-card_eng {
  border-top: 8px solid var(--color-yellow);
}

.page-about .about-team-card_analyst {
  border-top: 8px solid var(--color-fog);
}

.page-about .about-team-num {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 6vw, 4.4rem);
  line-height: 1;
  color: var(--color-paper);
  font-weight: 700;
}

.page-about .about-team-unit {
  font-size: 0.9rem;
  color: var(--color-fog);
  margin-left: 4px;
}

.page-about .about-team-role {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-paper);
  margin: 0.6rem 0 0.3rem;
}

.page-about .about-team-note {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-fog);
  margin: 0;
}

.page-about .about-user-scale {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 2.5rem;
  border: 2px solid var(--color-edge);
  background: var(--color-moss);
  padding: 1rem;
}

@media (max-width: 600px) {
  .page-about .about-user-scale {
    grid-template-columns: 1fr;
  }
}

.page-about .about-user-scale div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-user-scale span {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--color-lime);
  font-weight: 700;
}

.page-about .about-user-scale small {
  color: var(--color-fog);
  font-size: 0.8rem;
}

.page-about .about-philosophy {
  position: relative;
  z-index: 1;
  margin-top: 2.5rem;
  border: 2px solid var(--color-edge);
  background: var(--color-night);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

@media (min-width: 900px) {
  .page-about .about-philosophy {
    padding: 2rem 2.4rem;
  }
}

.page-about .about-philosophy-title {
  font-family: var(--font-head);
  font-size: 1.8rem;
  text-transform: uppercase;
  margin-top: 0.4rem;
}

.page-about .about-philosophy-list {
  list-style: none;
  padding: 0;
  margin: 1.4rem 0 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-philosophy-list li {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  padding-bottom: 1.1rem;
  border-bottom: 1px dashed var(--color-edge);
}

.page-about .about-philosophy-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-philosophy-list .data-chip {
  background: var(--color-moss);
  color: var(--color-lime);
  border: 1px solid var(--color-edge);
}

.page-about .about-philosophy-list li p {
  margin: 0;
  color: var(--color-fog);
  font-size: 0.9rem;
  line-height: 1.6;
}

.page-about .about-achievements {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 2rem;
}

@media (max-width: 640px) {
  .page-about .about-achievements {
    grid-template-columns: 1fr;
  }
}

.page-about .about-achievement {
  background: var(--color-moss);
  border: 1px solid var(--color-edge);
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--color-lime);
}

.page-about .about-achievement-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-paper);
}

.page-about .about-achievement-note {
  display: block;
  font-size: 0.82rem;
  color: var(--color-fog);
  margin-top: 4px;
  line-height: 1.5;
}

/* ===== More links ===== */
.page-about .about-more-section {
  padding: clamp(3rem, 7vw, 5rem) 0;
  border-top: 2px solid var(--color-edge);
  background: var(--color-moss);
}

.page-about .about-more-head {
  margin-bottom: 1.8rem;
}

.page-about .about-more-title {
  margin-bottom: 0.25em;
}

.page-about .about-more-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .page-about .about-more-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.page-about .about-more-link {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  border: 2px solid var(--color-edge);
  background: var(--color-night);
  color: var(--color-paper);
  text-decoration: none;
  padding: 1.2rem 1.4rem 1.4rem;
  transition: border-color var(--time-fast), transform var(--time-mid), box-shadow var(--time-mid);
  box-shadow: var(--shadow-card);
}

.page-about .about-more-link:hover,
.page-about .about-more-link:focus-visible {
  border-color: var(--color-lime);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lime);
  color: var(--color-paper);
}

.page-about .about-more-index {
  font-family: var(--font-mono);
  color: var(--color-lime);
}

.page-about .about-more-link strong {
  font-family: var(--font-head);
  font-size: 1.5rem;
  text-transform: uppercase;
}

.page-about .about-more-link p {
  color: var(--color-fog);
  font-size: 0.86rem;
  line-height: 1.6;
  margin: 0.2rem 0 0;
}