.page-about {
  position: relative;
  background: var(--c-bg);
  color: var(--c-text);
}

/* Hero */
.page-about__hero {
  position: relative;
  padding: 2.5rem 0 3rem;
  background: linear-gradient(135deg, var(--c-bg) 0%, var(--c-panel) 78%, var(--c-float) 100%);
  overflow: hidden;
}

.page-about__hero-slant {
  position: absolute;
  right: -18%;
  top: -12%;
  width: 72%;
  height: 124%;
  background: linear-gradient(150deg, var(--c-red) 0%, var(--c-red) 62%, var(--c-red-bright) 100%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 10% 100%);
  transform: skewX(-8deg);
  opacity: 0.92;
  pointer-events: none;
  z-index: 0;
}

.page-about__hero-inner {
  position: relative;
  z-index: 1;
  max-width: 43rem;
  margin: 0;
}

.page-about__breadcrumb-sep {
  margin: 0 0.375rem;
  color: var(--c-gray);
}

.page-about__title {
  margin: 1rem 0 1.25rem;
  max-width: 13em;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 3.25rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-about__lead {
  max-width: 34rem;
  margin: 0;
  color: var(--c-silver);
  font-size: 1rem;
  line-height: 1.75;
}

.page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-about__hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  border: 1px solid var(--c-line);
  background: rgba(11, 20, 36, 0.7);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-silver);
}

.page-about__hero-badge::before {
  content: "";
  width: 0.375rem;
  height: 0.375rem;
  background: var(--c-green);
  border-radius: 50%;
}

/* Section base */
.page-about__section {
  padding: 3.5rem 0;
}

.page-about__section h2 {
  margin: 0.75rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.2;
}

.page-about__section p {
  color: var(--c-silver);
  line-height: 1.75;
}

.page-about__section-lead {
  max-width: 42rem;
}

/* Side panel */
.page-about__side-panel {
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  background: var(--c-panel);
}

.page-about__side-panel::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 1rem;
  height: 1rem;
  background: var(--c-bg);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-about__data-meter {
  margin: 1rem 0 0;
}

.page-about__data-meter div {
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about__data-meter div:last-child {
  border-bottom: 0;
}

.page-about__data-meter dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--c-gray);
}

.page-about__data-meter dd {
  margin: 0.25rem 0 0;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--c-text);
}

/* Migration */
.page-about__migration {
  position: relative;
  padding: 3.5rem 0 4rem;
  background: var(--c-panel);
}

.page-about__migration-band {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0.375rem;
  background: linear-gradient(90deg, var(--c-red) 0%, var(--c-red-bright) 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 3rem) 100%, 0 100%);
}

.page-about__migration-intro {
  max-width: 40rem;
}

.page-about__timeline {
  position: relative;
  margin-top: 2rem;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 1.5rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-red), var(--c-line) 80%, transparent);
}

.page-about__timeline-item {
  position: relative;
  padding: 0 0 2rem 4.5rem;
}

.page-about__timeline-marker {
  position: absolute;
  left: 0;
  top: 0.375rem;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-float);
  border: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--c-red);
  clip-path: polygon(0 0, calc(100% - 0.75rem) 0, 100% 0.75rem, 100% 100%, 0 100%);
}

.page-about__timeline-title {
  margin: 0 0 0.5rem;
  padding-top: 0.375rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 800;
}

.page-about__timeline-text {
  max-width: 32rem;
  margin: 0;
  color: var(--c-silver);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* Migration visual */
.page-about__migration-visual {
  position: relative;
  padding: 1rem 1rem 0.75rem;
  background: var(--c-float);
  clip-path: polygon(0 0, calc(100% - 1.5rem) 0, 100% 1.5rem, 100% 100%, 0 100%);
}

.page-about__migration-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 8 / 9;
  object-fit: cover;
}

.page-about__img-caption {
  margin: 0.75rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--c-gray);
}

/* Coverage */
.page-about__coverage-tabs {
  margin-top: 2rem;
}

.page-about__tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--c-line);
}

.page-about__tab-btn {
  appearance: none;
  position: relative;
  padding: 0.75rem 1.25rem;
  border: 0;
  background: transparent;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-gray);
  cursor: pointer;
  transition: color 240ms var(--ease-out);
}

.page-about__tab-btn::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: -1px;
  height: 2px;
  background: var(--c-red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 240ms var(--ease-out);
}

.page-about__tab-btn.is-active {
  color: var(--c-text);
}

.page-about__tab-btn.is-active::after {
  transform: scaleX(1);
}

.page-about [data-tabs] [data-tab-panel] {
  display: block;
}

.js .page-about [data-tabs] [data-tab-panel] {
  display: none;
}

.js .page-about [data-tabs] [data-tab-panel].is-active {
  display: block;
}

.page-about__metric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about__metric {
  position: relative;
  overflow: hidden;
  padding: 1rem 1.125rem;
  background: var(--c-panel);
  border-left: 2px solid var(--c-red);
}

.page-about__metric::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0.625rem;
  height: 0.625rem;
  background: var(--c-bg);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-about__metric-name {
  display: block;
  font-weight: 800;
  font-size: 0.9375rem;
  color: var(--c-text);
}

.page-about__metric-detail {
  display: block;
  margin-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-gray);
}

.page-about__coverage-figure {
  margin: 2rem 0 0;
}

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

.page-about__update-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about__update-item {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 1.25rem;
  background: var(--c-float);
}

.page-about__update-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0.3125rem;
  height: 100%;
  background: var(--c-red);
}

.page-about__update-key {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--c-red);
}

.page-about__update-value {
  color: var(--c-silver);
  font-size: 0.9375rem;
}

/* Nav tree */
.page-about__nav-tree {
  margin-top: 2rem;
  border-left: 1px solid var(--c-line);
}

.page-about__tree-node {
  position: relative;
  padding: 0.75rem 0 0.75rem 1.5rem;
}

.page-about__tree-node::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 1.5rem;
  width: 0.625rem;
  height: 1px;
  background: var(--c-line);
}

.page-about__tree-node::after {
  content: "";
  position: absolute;
  left: -0.375rem;
  top: 1.25rem;
  width: 0.625rem;
  height: 0.625rem;
  background: var(--c-float);
  border: 1px solid var(--c-red);
  transform: rotate(45deg);
}

.page-about__tree-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-about__tree-index {
  padding: 0.25rem 0.5rem;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-gray);
}

.page-about__tree-name {
  font-weight: 800;
  font-size: 1rem;
  color: var(--c-text);
  text-decoration: none;
}

a.page-about__tree-name:hover {
  color: var(--c-red-bright);
}

.page-about__tree-desc {
  max-width: 30rem;
  margin: 0.375rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--c-gray);
}

.page-about__nav-figure {
  margin: 0;
}

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

/* Ops */
.page-about__ops-list {
  margin-top: 2rem;
  border-top: 1px solid var(--c-line);
}

.page-about__ops-item {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about__ops-time {
  padding-top: 0.25rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--c-red);
}

.page-about__ops-body h3 {
  margin: 0 0 0.375rem;
  font-size: 1.0625rem;
  font-weight: 800;
}

.page-about__ops-body p {
  margin: 0;
  color: var(--c-silver);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.page-about__ops-panel {
  position: relative;
  overflow: hidden;
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  background: var(--c-panel);
}

.page-about__ops-panel::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0.75rem;
  height: 0.75rem;
  background: var(--c-bg);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-about__ops-panel ul {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about__ops-panel li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.25rem;
  border-bottom: 1px solid var(--c-line);
  font-size: 0.9375rem;
  color: var(--c-silver);
}

.page-about__ops-panel li:last-child {
  border-bottom: 0;
}

.page-about__ops-panel li::before {
  content: "›";
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--c-red);
}

/* Continue */
.page-about__section--continue {
  background: var(--c-panel);
}

.page-about__continue {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-about__continue-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__continue-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.125rem;
  background: var(--c-float);
  border: 1px solid var(--c-line);
  color: var(--c-text);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  transition: border-color 240ms var(--ease-out), transform 240ms var(--ease-out);
}

.page-about__continue-link::before {
  content: "›";
  font-family: var(--font-mono);
  color: var(--c-red);
}

.page-about__continue-link:hover {
  border-color: var(--c-red);
  transform: translateY(-2px);
}

/* Tablet and up */
@media (min-width: 48rem) {
  .page-about__hero {
    padding: 4rem 0;
  }

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

  .page-about__update-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__ops-item {
    grid-template-columns: 7rem 1fr;
  }

  .page-about__continue-links {
    flex-wrap: nowrap;
  }
}

/* Desktop */
@media (min-width: 64rem) {
  .page-about__hero {
    padding: 5.5rem 0 4.5rem;
  }

  .page-about__hero-slant {
    right: -8%;
    width: 52%;
  }

  .page-about__hero-inner {
    max-width: 45rem;
  }

  .page-about__title {
    max-width: 11em;
  }

  .page-about__metric-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__migration {
    padding: 5rem 0;
  }

  .page-about__timeline-item {
    padding-bottom: 2.5rem;
  }
}