.page-about {
  --about-rail: 132px;
  --about-body: 720px;
}

/* ---------- hero ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(24px, 4vw, 44px);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(46, 211, 160, 0.1), transparent 58%),
    radial-gradient(90% 70% at 92% 10%, rgba(182, 255, 60, 0.07), transparent 62%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(199, 205, 203, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 205, 203, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.9fr);
    gap: 64px;
    align-items: end;
  }
}

.page-about .about-hero__coord {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-hero__coord-num {
  font-family: var(--font-mono);
  font-size: clamp(56px, 11vw, 128px);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .about-hero__coord-cap {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--silver);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(28px, 4.2vw, 50px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.85;
  color: rgba(232, 237, 234, 0.76);
}

.page-about .about-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(34px, 5vw, 56px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .about-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-strip > div {
  background: linear-gradient(180deg, rgba(18, 36, 28, 0.9), rgba(10, 15, 13, 0.96));
  padding: 18px 20px 20px;
}

.page-about .about-strip dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--silver);
}

.page-about .about-strip dd {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-strip__unit {
  margin-left: 5px;
  font-size: 0.48em;
  font-weight: 500;
  color: var(--lime);
}

.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-index__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--silver);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .about-index__item:hover,
.page-about .about-index__item:focus-visible {
  color: var(--lime);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(182, 255, 60, 0.72);
}

/* ---------- chapter rows ---------- */

.page-about .about-chapter {
  scroll-margin-top: 32px;
}

.page-about .about-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

@media (min-width: 900px) {
  .page-about .about-row {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 0 56px;
  }
}

.page-about .about-row__rail {
  display: flex;
  align-items: center;
  gap: 14px;
}

@media (min-width: 900px) {
  .page-about .about-row__rail {
    display: block;
    position: sticky;
    top: 48px;
    align-self: start;
    padding-top: 4px;
  }
}

.page-about .about-row__year {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lime);
  white-space: nowrap;
}

@media (min-width: 900px) {
  .page-about .about-row__year {
    display: block;
    font-size: 26px;
    letter-spacing: 0.04em;
  }
}

.page-about .about-row__rule {
  display: block;
  width: 44px;
  height: 1px;
  background: linear-gradient(90deg, rgba(182, 255, 60, 0.6), transparent);
}

@media (min-width: 900px) {
  .page-about .about-row__rule {
    width: 1px;
    height: 84px;
    margin-top: 20px;
    background: linear-gradient(180deg, rgba(182, 255, 60, 0.6), rgba(199, 205, 203, 0.04));
  }
}

.page-about .about-row__main {
  min-width: 0;
}

.page-about .about-row__main .section-title {
  margin-top: 10px;
  max-width: 22ch;
}

.page-about .about-text {
  margin: 18px 0 0;
  max-width: var(--about-body);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 237, 234, 0.74);
}

@media (min-width: 900px) {
  .page-about .about-text {
    font-size: 17px;
  }
}

.page-about .about-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(182, 255, 60, 0.36);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- figures ---------- */

.page-about .about-figure {
  margin: 32px 0 0;
  max-width: 880px;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(18, 36, 28, 0.72), rgba(10, 15, 13, 0.96));
}

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

.page-about .about-figure__cap {
  padding: 12px 18px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--silver);
}

.page-about .about-diagram {
  margin: 30px 0 0;
  max-width: 880px;
  padding: 26px 22px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    radial-gradient(80% 120% at 12% 0%, rgba(46, 211, 160, 0.08), transparent 62%),
    linear-gradient(180deg, rgba(18, 36, 28, 0.7), rgba(10, 15, 13, 0.96));
}

.page-about .about-version-map {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .vm-panel {
  fill: rgba(18, 36, 28, 0.9);
  stroke: rgba(199, 205, 203, 0.24);
  stroke-width: 1;
}

.page-about .vm-row {
  stroke: rgba(199, 205, 203, 0.36);
  stroke-width: 3;
  stroke-linecap: round;
}

.page-about .vm-block {
  fill: none;
  stroke: rgba(199, 205, 203, 0.3);
  stroke-width: 1.2;
}

.page-about .vm-chip {
  fill: var(--orange);
  opacity: 0.85;
}

.page-about .vm-dot {
  fill: rgba(199, 205, 203, 0.42);
}

.page-about .vm-dot--on {
  fill: var(--lime);
}

.page-about .vm-label {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.08em;
  fill: var(--lime);
}

.page-about .vm-note {
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  fill: rgba(199, 205, 203, 0.72);
}

/* ---------- version list ---------- */

.page-about .about-versions {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  max-width: 880px;
}

.page-about .about-versions__item {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 640px) {
  .page-about .about-versions__item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 26px;
  }
}

.page-about .about-versions__tag {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-about .about-versions__title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-versions__body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(232, 237, 234, 0.66);
}

/* ---------- output bars ---------- */

.page-about .about-bars {
  padding: clamp(52px, 7vw, 96px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(27, 58, 44, 0.7) 0%, rgba(10, 15, 13, 0.95) 72%);
  scroll-margin-top: 32px;
}

.page-about .about-bars__title {
  margin: 10px 0 0;
  max-width: 26ch;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 26px;
  max-width: 900px;
}

.page-about .about-bar:first-of-type {
  margin-top: 34px;
}

@media (min-width: 720px) {
  .page-about .about-bar {
    grid-template-columns: 132px minmax(0, 1fr) 116px;
    align-items: center;
    gap: 22px;
  }
}

.page-about .about-bar__label {
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--silver);
}

.page-about .about-bar__track {
  position: relative;
  display: block;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: rgba(199, 205, 203, 0.1);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  transition: filter var(--dur) var(--ease);
}

.page-about .about-bar__fill--lime {
  width: 50%;
  background: linear-gradient(90deg, rgba(182, 255, 60, 0.4), var(--lime));
}

.page-about .about-bar__fill--orange {
  width: 100%;
  background: linear-gradient(90deg, rgba(255, 106, 31, 0.4), var(--orange));
}

.page-about .about-bar:hover .about-bar__fill {
  filter: brightness(1.18);
}

.page-about .about-bar__value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-about .about-bar__value {
    text-align: right;
  }
}

.page-about .about-bars__note {
  margin: 26px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(199, 205, 203, 0.72);
}

/* ---------- crew ---------- */

.page-about .about-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 34px;
  max-width: 880px;
}

@media (min-width: 800px) {
  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }
}

.page-about .about-crew__item {
  padding-top: 18px;
  border-top: 2px solid rgba(199, 205, 203, 0.18);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-crew__item:hover {
  border-top-color: var(--lime);
}

.page-about .about-crew__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .about-crew__title {
  margin: 12px 0 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-crew__item p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(232, 237, 234, 0.68);
}

/* ---------- quote ---------- */

.page-about .about-quote {
  margin: 30px 0 0;
  max-width: 640px;
  padding: 24px 26px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--lime);
  border-radius: 4px 16px 16px 4px;
  background: linear-gradient(135deg, rgba(20, 21, 23, 0.95), rgba(18, 36, 28, 0.72));
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- partners ---------- */

.page-about .about-swap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 32px;
  max-width: 880px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

@media (min-width: 780px) {
  .page-about .about-swap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-swap__side {
  padding: 24px 22px 26px;
  background: linear-gradient(180deg, rgba(18, 36, 28, 0.88), rgba(10, 15, 13, 0.96));
}

.page-about .about-swap__side--them {
  background: linear-gradient(180deg, rgba(20, 21, 23, 0.92), rgba(10, 15, 13, 0.96));
}

.page-about .about-swap__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .about-swap__side--them .about-swap__title {
  color: var(--orange);
}

.page-about .about-swap__list {
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-swap__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(232, 237, 234, 0.7);
}

.page-about .about-swap__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 1px;
  background: var(--silver);
}

/* ---------- annual ---------- */

.page-about .about-annual {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 26px;
}

@media (min-width: 1024px) {
  .page-about .about-annual {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .about-annual__body .about-text:first-child {
  margin-top: 0;
}

.page-about .about-annual__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(18, 36, 28, 0.72), rgba(10, 15, 13, 0.96));
}

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

/* ---------- close ---------- */

.page-about .about-close {
  padding: clamp(72px, 11vw, 144px) 0 clamp(72px, 9vw, 120px);
  background: radial-gradient(90% 120% at 50% 0%, rgba(46, 211, 160, 0.09), transparent 62%);
}

.page-about .about-close__title {
  margin: 0;
  max-width: 26ch;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 34px);
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-close__text {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 237, 234, 0.72);
}

.page-about .about-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__item,
  .page-about .about-link,
  .page-about .about-bar__fill,
  .page-about .about-crew__item {
    transition: none;
  }
}