.signal-about {
  --about-panel: color-mix(in srgb, var(--s1) 92%, transparent);
  --about-line: color-mix(in srgb, var(--line) 78%, var(--y) 22%);
  --about-green: #55d68b;
  --about-red: #ff746c;
  padding-bottom: clamp(4rem, 8vw, 7rem);
  overflow: clip;
}

.signal-about :where(h1, h2, h3, p, figure) {
  margin-top: 0;
}

.signal-about :where(section, header) {
  scroll-margin-top: 5.5rem;
}

.signal-about__status {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--s1) 88%, transparent);
  color: var(--muted);
  font: 700 .68rem/1.3 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.signal-about__status .wrap {
  display: flex;
  min-height: 2.5rem;
  align-items: center;
  gap: .62rem;
  overflow: hidden;
}

.signal-about__status .wrap > span {
  white-space: nowrap;
}

.signal-about__status-mark {
  width: .5rem;
  height: .5rem;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--y);
  box-shadow: 0 0 0 .25rem var(--y-dim);
}

.signal-about__hero {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(28rem, 1.08fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  padding-top: clamp(3rem, 7vw, 6.25rem);
  padding-bottom: clamp(2.25rem, 5vw, 4.5rem);
}

.signal-about__hero-copy {
  position: relative;
  z-index: 2;
}

.signal-about__eyebrow {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: 1rem;
  color: var(--y);
  font: 800 .7rem/1.2 var(--mono);
  letter-spacing: .17em;
  text-transform: uppercase;
}

.signal-about__eyebrow::before {
  width: 1.65rem;
  height: 1px;
  content: "";
  background: currentColor;
  box-shadow: .45rem 0 0 color-mix(in srgb, currentColor 42%, transparent);
}

.signal-about__hero h1 {
  max-width: 13ch;
  margin-bottom: 1.35rem;
  color: var(--hero);
  font-size: clamp(2.65rem, 5.7vw, 5.4rem);
  font-weight: 720;
  line-height: .98;
  letter-spacing: -.035em;
  text-wrap: balance;
}

.signal-about__lede {
  max-width: 39rem;
  margin-bottom: 1.6rem;
  color: var(--soft);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.7;
}

.signal-about__scope-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .85rem 1rem;
  max-width: 40rem;
  margin: 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--y);
  background: var(--about-panel);
}

.signal-about__scope-label {
  align-self: start;
  padding: .35rem .48rem;
  border: 1px solid var(--y-line);
  border-radius: .25rem;
  color: var(--y);
  font: 800 .62rem/1 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.signal-about__scope-note p {
  margin: 0;
  color: var(--soft);
  font-size: .88rem;
  line-height: 1.55;
}

.signal-about__jump {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.5rem;
}

.signal-about__jump a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: .68rem 1rem;
  border: 1px solid var(--s3);
  border-radius: .55rem;
  color: var(--text);
  font-size: .82rem;
  font-weight: 750;
}

.signal-about__jump a:first-child {
  border-color: var(--y);
  background: var(--y);
  color: #111;
}

.signal-about__jump a:hover {
  border-color: var(--y);
  background: var(--y-dim);
  color: var(--y);
}

.signal-about__jump a:first-child:hover {
  background: var(--y2);
  color: #111;
}

.signal-about__hero-visual {
  position: relative;
  min-width: 0;
  margin: 0;
}

.signal-about__visual-frame {
  position: relative;
  isolation: isolate;
  min-height: 34rem;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: 1rem;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--line) 28%, transparent) 1px, transparent 1px) 0 0 / 2.5rem 2.5rem,
    linear-gradient(color-mix(in srgb, var(--line) 28%, transparent) 1px, transparent 1px) 0 0 / 2.5rem 2.5rem,
    radial-gradient(circle at 70% 35%, var(--y-dim), transparent 42%),
    var(--about-panel);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--text) 3%, transparent);
}

.signal-about__visual-frame::before {
  position: absolute;
  z-index: 2;
  top: 0;
  right: 0;
  left: 0;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--y), transparent);
  opacity: .85;
}

.signal-about__constellation {
  position: absolute;
  z-index: 1;
  inset: 1rem -2.3rem auto 5.25rem;
  width: calc(100% + 1rem);
  max-width: none;
  height: auto;
}

.signal-about__constellation img,
.signal-about__constellation svg {
  display: block;
  width: 100%;
  height: auto;
}

.signal-about__scout {
  position: absolute;
  z-index: 3;
  bottom: -1.7rem;
  left: -3rem;
  width: min(50%, 19rem);
  height: auto;
  filter: drop-shadow(0 1.2rem 1.5rem rgba(0, 0, 0, .5));
}

.signal-about__hero-visual figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: .7rem;
  color: var(--faint);
  font: 700 .62rem/1.35 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.signal-about__hero-visual figcaption span:last-child {
  text-align: right;
}

.signal-about__ribbon {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: clamp(.5rem, 1.5vw, 1.1rem);
  padding-top: 1rem;
  padding-bottom: 1rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.signal-about__ribbon > span {
  display: flex;
  align-items: center;
  gap: .7rem;
  color: var(--soft);
  font: 750 .72rem/1.2 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.signal-about__ribbon b {
  color: var(--y);
  font-weight: 800;
}

.signal-about__ribbon > i {
  color: var(--faint);
  font-style: normal;
}

.signal-about__section {
  padding-top: clamp(4.5rem, 9vw, 8rem);
}

.signal-about__section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, .62fr);
  gap: .75rem clamp(2rem, 6vw, 6rem);
  align-items: end;
  margin-bottom: clamp(2rem, 5vw, 4rem);
}

.signal-about__section-head .signal-about__eyebrow {
  grid-column: 1 / -1;
  margin-bottom: .25rem;
}

.signal-about__section-head h2 {
  max-width: 17ch;
  color: var(--hero);
  font-size: clamp(2rem, 4vw, 3.65rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.025em;
  text-wrap: balance;
}

.signal-about__section-head > p:last-child {
  max-width: 42rem;
  margin-bottom: .2rem;
  color: var(--muted);
  line-height: 1.7;
}

.signal-about__trail {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: signal-step;
}

.signal-about__trail::before {
  position: absolute;
  top: 2rem;
  bottom: 2rem;
  left: 2.1rem;
  width: 1px;
  content: "";
  background: linear-gradient(var(--y), var(--y-line) 68%, var(--line));
}

.signal-about__trail li {
  position: relative;
  display: grid;
  grid-template-columns: 4.25rem minmax(0, 1fr) minmax(13rem, .42fr);
  gap: 1.4rem clamp(1rem, 4vw, 3rem);
  align-items: center;
  min-height: 10.5rem;
  padding: 1.5rem 1.5rem 1.5rem 0;
  border-top: 1px solid var(--line);
}

.signal-about__trail li:last-child {
  border-bottom: 1px solid var(--line);
}

.signal-about__step-index {
  position: relative;
  z-index: 1;
  display: grid;
  width: 4.25rem;
  height: 4.25rem;
  place-items: center;
  border: 1px solid var(--y-line);
  border-radius: 50%;
  background: var(--bg);
  color: var(--y);
  font: 800 .75rem/1 var(--mono);
  box-shadow: 0 0 0 .5rem var(--bg);
}

.signal-about__step-state,
.signal-about__source-flow article > p {
  margin-bottom: .55rem;
  color: var(--y);
  font: 800 .66rem/1.2 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.signal-about__trail h3,
.signal-about__boundary h3,
.signal-about__principle-grid h3,
.signal-about__source-flow h3 {
  margin: 0;
  color: var(--text);
  font-family: var(--body);
  font-size: 1.12rem;
  font-weight: 780;
  line-height: 1.25;
}

.signal-about__trail li > div > p:last-child {
  max-width: 42rem;
  margin: .65rem 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.signal-about__output {
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: .6rem;
  background: var(--about-panel);
}

.signal-about__output span,
.signal-about__output strong {
  display: block;
}

.signal-about__output span {
  margin-bottom: .4rem;
  color: var(--faint);
  font: 800 .6rem/1.2 var(--mono);
  letter-spacing: .11em;
  text-transform: uppercase;
}

.signal-about__output strong {
  color: var(--soft);
  font-size: .82rem;
  line-height: 1.45;
}

.signal-about__scope-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.signal-about__boundary {
  min-width: 0;
  padding: clamp(1.35rem, 3vw, 2.2rem);
  border: 1px solid var(--line);
  background: var(--about-panel);
}

.signal-about__boundary--check {
  border-top: 3px solid var(--about-green);
}

.signal-about__boundary--exclude {
  border-top: 3px solid var(--about-red);
}

.signal-about__boundary-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.signal-about__boundary-head > span {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  font: 800 1rem/1 var(--mono);
}

.signal-about__boundary--check .signal-about__boundary-head > span {
  background: color-mix(in srgb, var(--about-green) 14%, transparent);
  color: var(--about-green);
}

.signal-about__boundary--exclude .signal-about__boundary-head > span {
  background: color-mix(in srgb, var(--about-red) 14%, transparent);
  color: var(--about-red);
}

.signal-about__boundary-head p {
  margin-bottom: .35rem;
  color: var(--faint);
  font: 800 .61rem/1.2 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.signal-about__boundary ul {
  margin: 0;
  padding: .5rem 0 0;
  list-style: none;
}

.signal-about__boundary li {
  position: relative;
  display: grid;
  gap: .3rem;
  padding: 1rem 0 1rem 1.15rem;
  border-bottom: 1px solid var(--line);
}

.signal-about__boundary li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.signal-about__boundary li::before {
  position: absolute;
  top: 1.45rem;
  left: 0;
  width: .42rem;
  height: .42rem;
  content: "";
  border-radius: 50%;
  background: currentColor;
}

.signal-about__boundary--check li {
  color: var(--about-green);
}

.signal-about__boundary--exclude li {
  color: var(--about-red);
}

.signal-about__boundary li strong {
  color: var(--text);
  font-size: .88rem;
}

.signal-about__boundary li span {
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.5;
}

.signal-about__boundary-warning {
  margin: 1rem 0 0;
  padding: 1rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--about-red) 42%, var(--line));
  background: color-mix(in srgb, var(--about-red) 7%, var(--about-panel));
  color: var(--soft);
  font-size: .85rem;
}

.signal-about__boundary-warning strong {
  color: var(--about-red);
}

.signal-about__principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.signal-about__principle-grid article {
  min-width: 0;
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.signal-about__principle-grid article + article {
  border-left: 1px solid var(--line);
}

.signal-about__principle-grid article > span {
  display: block;
  margin-bottom: 2.75rem;
  color: var(--y);
  font: 800 .72rem/1 var(--mono);
}

.signal-about__principle-grid h3 {
  max-width: 18rem;
}

.signal-about__principle-grid p {
  margin: .75rem 0 0;
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.65;
}

.signal-about__source-flow {
  display: flex;
  align-items: stretch;
}

.signal-about__source-flow article {
  flex: 1 1 0;
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--line);
  background: var(--about-panel);
}

.signal-about__source-flow > i {
  display: grid;
  flex: 0 0 2.5rem;
  min-width: 2.5rem;
  place-items: center;
  color: var(--y);
  font-style: normal;
}

.signal-about__source-flow h3 {
  overflow-wrap: normal;
  word-break: normal;
}

.signal-about__source-flow article > span {
  display: block;
  margin-top: .75rem;
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.55;
}

.signal-about__contact {
  padding-bottom: 0;
}

.signal-about__contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
}

.signal-about__contact-grid a {
  position: relative;
  display: flex;
  min-height: 11.5rem;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.4rem;
  border: 1px solid var(--line);
  background: var(--about-panel);
  transition: transform 160ms ease-out, border-color 160ms ease-out, background-color 160ms ease-out;
}

.signal-about__contact-grid a::after {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  content: "↗";
  color: var(--y);
  font-size: 1.1rem;
}

.signal-about__contact-grid a:hover,
.signal-about__contact-grid a:focus-visible {
  border-color: var(--y);
  background: var(--y-dim);
  color: inherit;
  transform: translateY(-3px);
}

.signal-about__contact-grid a > span {
  padding-right: 1.5rem;
  color: var(--y);
  font: 800 .65rem/1.2 var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.signal-about__contact-grid strong {
  max-width: 19rem;
  margin-top: 2rem;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.45;
}

.signal-about__contact-grid small {
  margin-top: auto;
  color: var(--faint);
  font: 700 .62rem/1.2 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* Content is visible by default. The shared animator adds enhancement classes only after setup. */
.signal-about.is-signal-ready [data-signal-reveal] {
  transition: opacity 280ms ease-out, transform 280ms cubic-bezier(.2, .8, .2, 1);
}

.signal-about.is-signal-ready [data-signal-reveal]:not(.is-visible) {
  opacity: .001;
  transform: translateY(1rem);
}

.signal-about.is-signal-ready [data-signal-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.signal-about.is-signal-ready .signal-about__visual-frame.is-scanning::after {
  position: absolute;
  z-index: 4;
  top: 0;
  right: 0;
  left: 0;
  height: 20%;
  content: "";
  pointer-events: none;
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--y) 18%, transparent), transparent);
  animation: about-scan 3.6s ease-in-out 1 both;
}

@keyframes about-scan {
  0% { opacity: 0; transform: translateY(-100%); }
  18%, 78% { opacity: 1; }
  100% { opacity: 0; transform: translateY(500%); }
}

html[data-theme="light"] .signal-about {
  --about-green: #177b43;
  --about-red: #bd332f;
}

html[data-theme="light"] .signal-about__visual-frame,
html[data-theme="light"] .signal-about__boundary,
html[data-theme="light"] .signal-about__source-flow article,
html[data-theme="light"] .signal-about__contact-grid a {
  box-shadow: 0 .75rem 2.5rem rgba(30, 25, 10, .05);
}

@media (max-width: 1023px) {
  .signal-about__hero {
    grid-template-columns: minmax(0, 1fr) minmax(22rem, .9fr);
    gap: 2rem;
  }

  .signal-about__visual-frame {
    min-height: 28rem;
  }

  .signal-about__constellation {
    inset: 1rem -2rem auto 2.5rem;
  }

  .signal-about__scout {
    left: -2rem;
    width: 48%;
  }

  .signal-about__trail li {
    grid-template-columns: 4.25rem minmax(0, 1fr);
  }

  .signal-about__output {
    grid-column: 2;
  }

  .signal-about__source-flow {
    flex-direction: column;
    gap: .6rem;
  }

  .signal-about__source-flow article {
    flex: 1 1 auto;
  }

  .signal-about__source-flow > i {
    min-height: 1.5rem;
    transform: rotate(90deg);
  }
}

@media (max-width: 767px) {
  .signal-about__status .wrap {
    overflow-x: auto;
    scrollbar-width: none;
  }

  .signal-about__status .wrap::-webkit-scrollbar {
    display: none;
  }

  .signal-about__hero {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 3.25rem;
  }

  .signal-about__hero h1 {
    max-width: 12ch;
    font-size: clamp(2.65rem, 12vw, 4.25rem);
  }

  .signal-about__hero-visual {
    order: 2;
  }

  .signal-about__visual-frame {
    min-height: 25rem;
  }

  .signal-about__constellation {
    inset: .5rem -1.5rem auto 2rem;
  }

  .signal-about__scout {
    bottom: -1rem;
    left: -1.7rem;
    width: min(44%, 13rem);
  }

  .signal-about__ribbon {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: .5rem;
  }

  .signal-about__ribbon > span {
    min-width: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: .25rem;
    overflow-wrap: anywhere;
  }

  .signal-about__ribbon > i {
    display: none;
  }

  .signal-about__section-head {
    grid-template-columns: minmax(0, 1fr);
  }

  .signal-about__section-head .signal-about__eyebrow {
    grid-column: 1;
  }

  .signal-about__section-head h2 {
    max-width: 19ch;
  }

  .signal-about__scope-grid,
  .signal-about__principle-grid,
  .signal-about__contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .signal-about__principle-grid article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .signal-about__principle-grid article > span {
    margin-bottom: 1.5rem;
  }

  .signal-about__contact-grid a {
    min-height: 10rem;
  }
}

@media (max-width: 479px) {
  .signal-about .wrap {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .signal-about__scope-note {
    grid-template-columns: 1fr;
  }

  .signal-about__scope-label {
    justify-self: start;
  }

  .signal-about__jump {
    display: grid;
    grid-template-columns: 1fr;
  }

  .signal-about__jump a {
    width: 100%;
  }

  .signal-about__visual-frame {
    min-height: 20rem;
  }

  .signal-about__hero-visual figcaption {
    display: grid;
  }

  .signal-about__hero-visual figcaption span:last-child {
    text-align: left;
  }

  .signal-about__trail::before {
    left: 1.5rem;
  }

  .signal-about__trail li {
    grid-template-columns: 3rem minmax(0, 1fr);
    gap: 1rem;
    padding-right: 0;
  }

  .signal-about__step-index {
    width: 3rem;
    height: 3rem;
    box-shadow: 0 0 0 .3rem var(--bg);
  }

  .signal-about__output {
    grid-column: 1 / -1;
    margin-left: 4rem;
  }

  .signal-about__boundary {
    padding: 1.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .signal-about,
  .signal-about *,
  .signal-about *::before,
  .signal-about *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition-duration: .01ms !important;
  }

  .signal-about.is-signal-ready [data-signal-reveal],
  .signal-about.is-signal-ready [data-signal-reveal]:not(.is-visible) {
    opacity: 1;
    transform: none;
  }

  .signal-about__contact-grid a:hover,
  .signal-about__contact-grid a:focus-visible {
    transform: none;
  }
}