.page-about {
  --about-rail: 168px;
  --about-line: rgba(36, 26, 20, 0.16);
  --about-gap: clamp(20px, 4vw, 44px);
  color: var(--brown);
  overflow-x: clip;
}

.page-about .breadcrumb {
  margin: 0 0 clamp(20px, 4vw, 36px);
}

.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  padding-block: 0 clamp(40px, 7vw, 72px);
}

.page-about .hero-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--brick);
  text-transform: uppercase;
}

.page-about .hero-title {
  margin: 0.3em 0 0.4em;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 6.2vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--brown);
  text-shadow: 2px 2px 0 rgba(201, 138, 46, 0.45), -1px -1px 0 rgba(201, 138, 46, 0.18);
}

.page-about .hero-lede {
  max-width: 42em;
  margin: 0;
  font-size: clamp(1rem, 0.95rem + 0.35vw, 1.1rem);
  line-height: 1.85;
  color: var(--brown);
}

.page-about .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-meta li {
  padding: 6px 12px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  background: var(--paper-2);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.page-about .hero-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--paper-2);
  box-shadow: var(--shadow-plate);
}

.page-about .hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(36, 26, 20, 0.18) 0.7px, transparent 0.7px);
  background-size: 5px 5px;
  opacity: 0.32;
  mix-blend-mode: multiply;
}

.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: sepia(0.12) contrast(1.02);
}

.page-about .hero-caption {
  position: absolute;
  right: 14px;
  bottom: 14px;
  z-index: 1;
  padding: 6px 10px;
  border: 1px solid rgba(243, 233, 210, 0.55);
  border-radius: var(--radius-s);
  background: var(--brick);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  transform: rotate(-1.2deg);
}

.page-about .about-shell {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  padding-bottom: clamp(44px, 8vw, 96px);
}

.page-about .arc-rail {
  min-width: 0;
  border-left: 1px solid var(--about-line);
  padding-left: 18px;
}

.page-about .rail-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--brick);
}

.page-about .arc-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .arc-item {
  position: relative;
}

.page-about .arc-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 0.42em;
  width: 9px;
  height: 9px;
  border: 2px solid var(--paper);
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 1px var(--amber);
}

.page-about .arc-link {
  display: block;
  color: var(--brown);
  font-size: 0.9rem;
  line-height: 1.4;
  text-decoration: none;
}

.page-about .arc-link:hover,
.page-about .arc-link:focus-visible {
  color: var(--brick);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .rail-stamp {
  margin: 24px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--brick);
  border-radius: var(--radius-m);
  background: rgba(167, 72, 47, 0.06);
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.55;
  transform: rotate(-1.5deg);
}

.page-about .about-body {
  display: grid;
  gap: clamp(40px, 7vw, 84px);
  min-width: 0;
}

.page-about .about-section {
  min-width: 0;
  scroll-margin-top: 28px;
}

.page-about .about-section p {
  line-height: 1.8;
}

.page-about .section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brick);
}

.page-about .section-label span {
  color: var(--amber);
}

.page-about .section-h2 {
  margin: 0.35em 0 0.5em;
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3.6vw, 2.7rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--brown);
}

.page-about .section-lede {
  max-width: 42em;
  margin: 0 0 1.4em;
  color: var(--brown);
}

.page-about .about-section--tint {
  padding: clamp(20px, 3.5vw, 38px);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-l);
  background: linear-gradient(180deg, rgba(228, 214, 184, 0.72), rgba(228, 214, 184, 0.34));
  box-shadow: var(--shadow-plate);
}

.page-about .origin-timeline {
  position: relative;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .origin-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--amber), var(--brick));
  opacity: 0.5;
}

.page-about .origin-step {
  position: relative;
  margin-bottom: 22px;
  padding-left: 34px;
}

.page-about .origin-step:last-child {
  margin-bottom: 0;
}

.page-about .origin-node {
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  border: 3px solid var(--amber);
  border-radius: 50%;
  background: var(--paper);
  box-shadow: 0 0 0 4px var(--paper);
}

.page-about .origin-stage {
  margin: 0 0 4px;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .origin-copy p:last-child {
  margin: 0;
}

.page-about .archive-quote {
  position: relative;
  margin: 28px 0 0;
  padding: 18px 20px 18px 54px;
  border: 1px dashed var(--about-line);
  border-radius: var(--radius-m);
  background: var(--paper);
}

.page-about .archive-quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.75;
}

.page-about .quote-seal {
  position: absolute;
  left: 14px;
  top: 16px;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--brick);
  color: var(--paper);
  font-family: var(--font-serif);
  font-size: 0.82rem;
  line-height: 1;
}

.page-about .team-filter {
  margin-top: 22px;
}

.page-about .team-filter .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.page-about .team-filter .filter-btn {
  padding: 7px 13px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--brown);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  cursor: pointer;
}

.page-about .team-filter .filter-btn[aria-pressed="true"] {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.page-about .filter-status {
  margin: 0 0 16px;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

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

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  min-width: 0;
}

.page-about .team-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brick);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.page-about .team-card h3 {
  margin: 2px 0 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--brown);
}

.page-about .team-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-about .team-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 8px;
}

.page-about .team-card.is-filtered-out {
  display: none;
}

.page-about .step-list {
  display: grid;
  gap: 10px;
}

.page-about .arch-step {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: var(--paper);
  box-shadow: var(--shadow-plate);
}

.page-about .arch-step summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
}

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

.page-about .arch-step summary::after {
  content: "+";
  margin-left: auto;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
}

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

.page-about .step-index {
  display: grid;
  place-items: center;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--about-line);
  border-radius: 50%;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.page-about .step-name {
  font-weight: 700;
}

.page-about .step-body {
  padding: 0 16px 16px 54px;
}

.page-about .step-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
}

.page-about .arch-figure {
  margin: 24px 0 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-l);
  overflow: hidden;
}

.page-about .arch-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-server {
  padding: clamp(22px, 4vw, 42px);
  border-radius: var(--radius-l);
  background: radial-gradient(circle at 20% 0%, rgba(47, 211, 181, 0.14), transparent 42%), var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-server .section-label {
  color: var(--mint);
}

.page-about .about-server .section-label span {
  color: var(--amber);
}

.page-about .about-server .section-h2 {
  color: var(--paper);
}

.page-about .about-server .section-lede {
  color: rgba(243, 233, 210, 0.86);
}

.page-about .server-grid {
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .server-flow {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .server-flow li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding-left: 12px;
  border-left: 2px solid var(--mint);
  color: rgba(243, 233, 210, 0.9);
  font-size: 0.92rem;
  line-height: 1.65;
}

.page-about .server-flow .tag {
  flex: none;
}

.page-about .server-note {
  margin: 18px 0 0;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
}

.page-about .server-media {
  margin: 0;
  border: 1px solid rgba(243, 233, 210, 0.25);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .server-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.9);
}

.page-about .service-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .service-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .service-links a {
  color: var(--brick);
  font-size: 0.85rem;
  text-underline-offset: 3px;
}

.page-about .service-links a:hover,
.page-about .service-links a:focus-visible {
  color: var(--ink);
}

.page-about .contact-plate {
  margin-top: 24px;
  padding: 22px;
}

.page-about .contact-kicker {
  margin: 0 0 14px;
  color: var(--brick);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.page-about .contact-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.page-about .contact-row {
  display: grid;
  gap: 2px;
}

.page-about .contact-row dt {
  color: var(--halftone);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .contact-row dd {
  margin: 0;
  color: var(--brown);
  font-size: 0.94rem;
  line-height: 1.5;
  word-break: break-word;
}

.page-about .contact-note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--about-line);
  color: var(--brown);
  font-size: 0.84rem;
  line-height: 1.65;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

@media (min-width: 720px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 800px) {
  .page-about .server-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .arc-rail {
    position: sticky;
    top: 28px;
  }

  .page-about .contact-plate {
    margin-top: 0;
  }
}

@media (max-width: 959px) {
  .page-about .arc-rail {
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 0 0 6px;
    border-left: 0;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .page-about .rail-kicker,
  .page-about .rail-stamp {
    display: none;
  }

  .page-about .arc-list {
    display: flex;
    gap: 8px;
    flex: none;
  }

  .page-about .arc-item {
    flex: none;
  }

  .page-about .arc-item::before {
    display: none;
  }

  .page-about .arc-link {
    padding: 7px 12px;
    border: 1px solid var(--about-line);
    border-radius: 999px;
    background: var(--paper);
    font-size: 0.82rem;
    white-space: nowrap;
  }
}

@media (max-width: 520px) {
  .page-about .hero-caption {
    position: static;
    margin: 0;
    border-radius: 0;
    transform: none;
    padding: 8px 12px;
  }

  .page-about .step-body {
    padding-left: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .hero-figure img,
  .page-about .server-media img {
    filter: none;
  }
}
</main>