.page-about {
  --about-line: rgba(199, 206, 210, 0.18);
  --about-line-strong: rgba(199, 206, 210, 0.36);
  --about-grid: rgba(199, 206, 210, 0.07);
  background: var(--ink-green);
  color: var(--text-soft);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  color: var(--paper);
  letter-spacing: 0.02em;
  line-height: 1.18;
}

.page-about p {
  margin: 0;
}

.page-about .about-head {
  max-width: 62ch;
}

.page-about .about-head__title {
  margin-top: 10px;
  font-size: clamp(26px, 4.2vw, 40px);
}

.page-about .about-head__lead {
  margin-top: 14px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--text-mute);
}

.page-about .eyebrow {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--about-line);
  background:
    linear-gradient(150deg, rgba(255, 106, 26, 0.16) 0%, rgba(255, 106, 26, 0) 44%),
    linear-gradient(20deg, rgba(122, 33, 53, 0.18) 0%, rgba(122, 33, 53, 0) 38%),
    var(--ink-green);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(52vw, 620px);
  height: 5px;
  background: linear-gradient(90deg, rgba(255, 106, 26, 0) 0%, var(--signal) 100%);
}

.page-about .about-hero__stage {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__title {
  margin-top: 12px;
  font-size: clamp(32px, 6vw, 58px);
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin-top: 16px;
  max-width: 46ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: var(--text-soft);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__figure {
  margin: 0;
}

@media (min-width: 960px) {
  .page-about .about-hero__stage {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: end;
  }

  .page-about .about-hero__lead {
    max-width: 38ch;
  }
}

/* ---------- shared section rhythm ---------- */
.page-about .about-origin,
.page-about .about-roles,
.page-about .about-flow,
.page-about .about-standards,
.page-about .about-listen {
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-about .about-origin {
  background: var(--ink-green);
}

.page-about .about-roles {
  background: var(--carbon);
  border-top: 1px solid rgba(199, 206, 210, 0.08);
  border-bottom: 1px solid rgba(199, 206, 210, 0.08);
}

.page-about .about-flow {
  background:
    repeating-linear-gradient(90deg, var(--about-grid) 0 1px, transparent 1px 96px),
    var(--ink-green);
}

.page-about .about-standards {
  background: var(--carbon);
}

.page-about .about-listen {
  background: var(--ink-green);
}

/* ---------- timeline ---------- */
.page-about .track {
  position: relative;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .track::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--signal) 0%, rgba(199, 206, 210, 0.34) 46%, rgba(199, 206, 210, 0) 100%);
}

.page-about .track__item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: clamp(20px, 3vw, 30px);
}

.page-about .track__num {
  grid-column: 1;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--about-line-strong);
  background: var(--carbon);
  color: var(--silver);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.page-about .track__item:first-child .track__num {
  border-color: var(--signal);
  color: var(--signal);
}

.page-about .track__title {
  font-size: clamp(18px, 2.2vw, 22px);
}

.page-about .track__text {
  margin-top: 8px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-mute);
}

@media (min-width: 900px) {
  .page-about .track {
    padding-left: 8px;
  }

  .page-about .track::before {
    left: 26px;
  }

  .page-about .track__item {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .track__num {
    width: 54px;
    height: 54px;
    font-size: 15px;
  }
}

/* ---------- roles ---------- */
.page-about .roles {
  display: grid;
  gap: clamp(12px, 1.6vw, 18px);
  margin-top: clamp(28px, 4vw, 44px);
}

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

.page-about .role {
  position: relative;
  border: 1px solid var(--about-line);
  background: var(--deep-turf);
  transition: border-color 0.22s ease, background-color 0.22s ease, transform 0.22s ease;
}

.page-about .role:hover {
  border-color: rgba(255, 106, 26, 0.4);
}

.page-about .role[open] {
  border-color: rgba(255, 106, 26, 0.62);
  background:
    linear-gradient(180deg, rgba(255, 106, 26, 0.08) 0%, rgba(255, 106, 26, 0) 46%),
    var(--deep-turf);
}

.page-about .role__summary {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 52px 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .role__summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--signal);
  line-height: 1;
}

.page-about .role[open] .role__summary::after {
  content: "\2212";
}

.page-about .role__summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

.page-about .role__num {
  grid-row: 1 / span 2;
  align-self: start;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  color: var(--signal);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.page-about .role__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--paper);
  letter-spacing: 0.03em;
}

.page-about .role__hint {
  font-size: 13px;
  color: var(--text-mute);
  letter-spacing: 0.02em;
}

.page-about .role__body {
  padding: 0 20px 20px 80px;
  border-top: 1px dashed var(--about-line);
  margin: 0 20px 0 20px;
  padding-left: 0;
}

.page-about .role__body p {
  padding-top: 14px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- flow ---------- */
.page-about .flow {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 44px);
}

@media (min-width: 940px) {
  .page-about .flow {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .flow__steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: clamp(18px, 2.6vw, 26px);
}

.page-about .flow__step::before {
  content: "";
  position: absolute;
  left: 25px;
  top: 54px;
  bottom: -4px;
  width: 1px;
  background: repeating-linear-gradient(180deg, var(--about-line-strong) 0 6px, transparent 6px 13px);
}

.page-about .flow__step:last-child::before {
  display: none;
}

.page-about .flow__num {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: 1px solid var(--about-line-strong);
  background: var(--carbon);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
}

.page-about .flow__step:last-child .flow__num {
  border-color: var(--signal);
  background: var(--signal);
  color: var(--ink-on-signal);
}

.page-about .flow__title {
  font-size: clamp(17px, 2.1vw, 21px);
  padding-top: 2px;
}

.page-about .flow__body p {
  margin-top: 8px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-mute);
}

.page-about .flow__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .flow__figure {
  margin: 0;
}

.page-about .flow__trace {
  width: min(220px, 60%);
  height: auto;
}

.page-about .flow__note {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-mute);
  border-left: 2px solid var(--signal);
  padding-left: 12px;
}

/* ---------- standards tabs ---------- */
.page-about .tabs {
  margin-top: clamp(26px, 3.6vw, 40px);
}

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  border-bottom: 1px solid var(--about-line);
  padding-bottom: 0;
}

.page-about .tabs__tab {
  appearance: none;
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: var(--text-mute);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.1em;
  padding: 12px 14px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .tabs__tab:hover {
  color: var(--paper);
}

.page-about .tabs__tab[aria-selected="true"] {
  color: var(--paper);
  border-bottom-color: var(--signal);
}

.page-about .tabs__tab:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-about .tabs__panel {
  padding: clamp(20px, 3vw, 30px) 0 0;
}

.page-about .tabs__panel:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.page-about .std__lead {
  max-width: 54ch;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.85;
  color: var(--paper);
}

.page-about .std__list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .std__list li {
  position: relative;
  padding-left: 24px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .std__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 8px;
  height: 8px;
  background: var(--signal);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

@media (min-width: 780px) {
  .page-about .tabs__panel {
    padding-top: 28px;
  }
}

/* ---------- keep ---------- */
.page-about .about-keep {
  padding: clamp(48px, 7vw, 92px) 0;
  background: var(--deep-turf);
  border-top: 1px solid rgba(199, 206, 210, 0.1);
  border-bottom: 1px solid rgba(199, 206, 210, 0.1);
}

.page-about .keep {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

@media (min-width: 940px) {
  .page-about .keep {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
  }
}

.page-about .keep__text {
  margin-top: 14px;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .keep__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .keep__list li {
  padding: 12px 16px;
  border-left: 3px solid var(--signal);
  background: rgba(14, 43, 35, 0.55);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .keep__list strong {
  color: var(--paper);
  font-weight: 800;
}

.page-about .about-keep .arrow-link {
  display: inline-block;
  margin-top: 22px;
}

.page-about .about-keep .arrow-link,
.page-about .listen__foot .arrow-link {
  color: var(--signal);
  font-weight: 800;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 26, 0.45);
  padding-bottom: 2px;
}

.page-about .about-keep .arrow-link:hover,
.page-about .listen__foot .arrow-link:hover {
  border-bottom-color: var(--signal);
}

.page-about .keep__figure {
  margin: 0;
}

/* ---------- listen ---------- */
.page-about .listen {
  display: grid;
  gap: clamp(12px, 1.6vw, 18px);
  margin-top: clamp(28px, 4vw, 44px);
}

@media (min-width: 700px) {
  .page-about .listen {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .listen {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .listen__card {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--about-line);
  background: rgba(19, 20, 23, 0.72);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.page-about .listen__card:hover {
  transform: translateX(2px);
  border-color: rgba(255, 106, 26, 0.5);
}

.page-about .listen__tag {
  display: inline-block;
  margin-bottom: 14px;
}

.page-about .listen__title {
  font-size: 16px;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .listen__text {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-about .listen__foot {
  margin-top: clamp(22px, 3vw, 32px);
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-soft);
}

/* ---------- band + cta ---------- */
.page-about .about-band {
  padding: clamp(40px, 6vw, 72px) 0 clamp(48px, 7vw, 88px);
  background:
    repeating-linear-gradient(90deg, var(--about-grid) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, var(--about-grid) 0 1px, transparent 1px 72px),
    var(--carbon);
  border-top: 1px solid rgba(199, 206, 210, 0.1);
}

.page-about .band {
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

@media (min-width: 700px) {
  .page-about .band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .band__item {
  padding: 22px 20px 24px;
  background: var(--carbon);
}

.page-about .band__num {
  display: block;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 900;
  color: var(--signal);
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
}

.page-about .band__name {
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
  letter-spacing: 0.03em;
}

.page-about .band__desc {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
  letter-spacing: 0.02em;
}

.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(26px, 3.6vw, 40px);
  padding: clamp(22px, 3vw, 32px);
  border-left: 4px solid var(--signal);
  background: rgba(14, 43, 35, 0.6);
}

@media (min-width: 780px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

.page-about .about-cta__text {
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-about .role,
  .page-about .listen__card,
  .page-about .tabs__tab {
    transition: none;
  }

  .page-about .listen__card:hover {
    transform: none;
  }
}
</main>