.landing-page.signal-portal {
  --signal-bg: #040812;
  --signal-bg-2: #071222;
  --signal-panel: rgba(9, 18, 34, .72);
  --signal-panel-strong: rgba(12, 27, 50, .84);
  --signal-line: rgba(148, 163, 184, .18);
  --signal-line-strong: rgba(125, 211, 252, .34);
  --signal-text: #eef6ff;
  --signal-muted: #a9b8cb;
  --signal-dim: #718096;
  --signal-cyan: #79d8ff;
  --signal-teal: #5eead4;
  --signal-gold: #f5d36a;
  --signal-green: #86efac;
  min-height: calc(100vh - 70px);
  position: relative;
  overflow: hidden;
  color: var(--signal-text);
  background:
    linear-gradient(90deg, rgba(3, 7, 17, .97) 0%, rgba(3, 7, 17, .87) 32%, rgba(3, 7, 17, .46) 61%, rgba(3, 7, 17, .78) 100%),
    linear-gradient(180deg, rgba(3, 7, 17, .18), rgba(3, 7, 17, .9) 83%),
    url("../assets/landing/background_sacred_geometry_mountains.png") top center / min(100%, 1792px) auto no-repeat,
    radial-gradient(circle at 78% 12%, rgba(250, 204, 21, .18), transparent 20rem),
    radial-gradient(circle at 18% 22%, rgba(45, 212, 191, .16), transparent 26rem),
    linear-gradient(180deg, #030711 0%, #06101f 42%, #040812 100%);
}

.landing-page.signal-portal::before,
.landing-page.signal-portal::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.landing-page.signal-portal::before {
  opacity: .34;
  background-image:
    linear-gradient(rgba(148, 163, 184, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, .13) 1px, transparent 1px);
  background-size: 86px 86px;
  mask-image: radial-gradient(circle at 60% 14%, #000 0, transparent 52%);
}

.landing-page.signal-portal::after {
  background:
    linear-gradient(180deg, transparent 0%, rgba(4, 8, 18, .48) 58%, #040812 100%),
    radial-gradient(circle at 50% 0%, transparent 0 38%, rgba(4, 8, 18, .62) 76%);
}

.signal-portal > * {
  position: relative;
  z-index: 1;
}

.signal-hero {
  width: min(1640px, calc(100% - 88px));
  min-height: min(720px, calc(100vh - 70px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(520px, 1.1fr);
  align-items: center;
  gap: clamp(30px, 4.4vw, 76px);
  padding: clamp(62px, 7.4vw, 94px) 0 clamp(30px, 4.2vw, 48px);
}

.signal-hero-copy {
  max-width: 760px;
}

.signal-eyebrow {
  margin: 0 0 12px;
  color: var(--signal-cyan);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.signal-hero h1 {
  margin: 0;
  color: #f8fbff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(72px, 9.2vw, 132px);
  font-weight: 700;
  letter-spacing: -.045em;
  line-height: .82;
  text-shadow: 0 0 44px rgba(125, 211, 252, .18);
}

.signal-subtitle {
  max-width: 720px;
  margin: 26px 0 0;
  color: var(--signal-gold);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 650;
  line-height: 1.12;
  font-family: Georgia, "Times New Roman", serif;
}

.signal-tagline {
  margin: 18px 0 0;
  color: var(--signal-cyan);
  font-size: clamp(15px, 1.8vw, 19px);
  font-weight: 800;
  letter-spacing: .02em;
}

.signal-lede {
  max-width: 690px;
  margin: 20px 0 0;
  color: #d7e2ef;
  font-size: 18px;
  line-height: 1.68;
}

.signal-lede.secondary {
  color: var(--signal-muted);
  font-size: 16px;
}

.signal-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(138px, 1fr));
  gap: 14px;
  margin-top: 34px;
  width: min(820px, 100%);
}

.signal-portal .landing-btn {
  min-height: 72px;
  min-width: 0;
  border-radius: 10px;
  border: 1px solid rgba(226, 232, 240, .23);
  background: linear-gradient(180deg, rgba(10, 22, 40, .9), rgba(5, 12, 24, .86));
  color: #eaf3ff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06), 0 18px 44px rgba(0, 0, 0, .2);
  font-weight: 800;
  letter-spacing: .01em;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.signal-portal .landing-btn:hover,
.signal-portal .landing-btn:focus-visible {
  border-color: rgba(125, 211, 252, .72);
  background: rgba(14, 116, 144, .22);
  box-shadow: 0 0 0 3px rgba(125, 211, 252, .14);
}

.signal-portal .landing-btn.signal-primary {
  color: #05111d;
  border-color: rgba(186, 230, 253, .92);
  background: linear-gradient(135deg, rgba(35, 207, 255, .96), rgba(14, 116, 144, .92));
  color: #f7fcff;
  box-shadow: 0 16px 38px rgba(34, 211, 238, .18);
}

.signal-portal .landing-btn.quiet {
  color: #cfe0f2;
}

.signal-map {
  align-self: stretch;
  display: grid;
  align-items: center;
}

.signal-map-shell {
  position: relative;
  min-height: clamp(460px, 42vw, 620px);
  border: 1px solid rgba(226, 232, 240, .11);
  border-radius: 28px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(4, 8, 18, .46), rgba(4, 8, 18, .10) 58%, rgba(4, 8, 18, .34)),
    url("../assets/landing/background_sacred_geometry_mountains.png") center right / cover no-repeat,
    radial-gradient(circle at 78% 16%, rgba(245, 211, 106, .18), transparent 11rem),
    radial-gradient(circle at 20% 80%, rgba(94, 234, 212, .14), transparent 14rem);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .04),
    inset 0 0 82px rgba(4, 8, 18, .44),
    0 22px 70px rgba(0, 0, 0, .28);
}

.signal-map-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 7, 17, .58) 0%, rgba(3, 7, 17, .22) 22%, rgba(3, 7, 17, .10) 52%, rgba(3, 7, 17, .38) 100%),
    linear-gradient(180deg, rgba(3, 7, 17, .04), rgba(3, 7, 17, .14));
}

.signal-map-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 88% 18%, rgba(245, 211, 106, .16), transparent 26%);
}

.signal-map-label {
  position: absolute;
  top: 20px;
  left: 22px;
  z-index: 2;
  margin: 0;
  color: #d9dde8;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.signal-map-art {
  position: absolute;
  inset: 30px 20px 46px;
  width: calc(100% - 40px);
  height: calc(100% - 76px);
}

.signal-map-art text {
  fill: #b9c8db;
  font-size: 19px;
  font-weight: 800;
  paint-order: stroke;
  stroke: rgba(2, 6, 14, .72);
  stroke-width: 5px;
  stroke-linejoin: round;
}

.signal-map-art .logos-label {
  fill: var(--signal-gold);
  font-size: 22px;
  letter-spacing: .05em;
}

.signal-terrain {
  fill: none;
  stroke: rgba(148, 163, 184, .08);
  stroke-width: 2;
}

.signal-terrain.near {
  stroke: rgba(94, 234, 212, .18);
}

.signal-route-shadow,
.signal-route {
  fill: none;
  stroke-linecap: round;
}

.signal-route-shadow {
  stroke: rgba(245, 211, 106, .3);
  stroke-width: 14;
  filter: blur(9px);
  opacity: .78;
}

.signal-route {
  stroke: url(#signalPathGradient);
  stroke-width: 4;
  stroke-dasharray: 8 12;
  opacity: .82;
}

.signal-node-svg {
  fill: rgba(7, 18, 34, .36);
  stroke: #8be7ff;
  stroke-width: 3;
}

.signal-logos-glow {
  fill: url(#logosGlow);
}

.signal-logos {
  fill: var(--signal-gold);
  stroke: #fff4bd;
  stroke-width: 4;
}

.signal-map-caption {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #e2c978;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.signal-section {
  width: min(1576px, calc(100% - 88px));
  margin: 0 auto;
  padding: clamp(32px, 4.5vw, 58px) 0;
}

.signal-section-head {
  display: grid;
  gap: 6px;
  max-width: 840px;
  margin-bottom: 24px;
}

.signal-section-head.compact {
  margin-bottom: 18px;
}

.signal-section h2 {
  margin: 0;
  color: #f2f7ff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(32px, 4.8vw, 58px);
  line-height: 1.02;
  letter-spacing: -.025em;
}

.signal-feature-grid,
.signal-audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.signal-feature-grid article,
.signal-audience-grid article,
.signal-synthesis-card,
.signal-corpus div,
.signal-beta {
  border: 1px solid rgba(226, 232, 240, .12);
  background:
    linear-gradient(180deg, rgba(12, 27, 50, .7), rgba(6, 12, 24, .72));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
}

.signal-features {
  padding-top: 8px;
}

.signal-feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid rgba(226, 232, 240, .14);
  border-radius: 18px;
  background: rgba(3, 9, 19, .62);
  overflow: hidden;
  gap: 0;
}

.signal-feature-grid article,
.signal-audience-grid article {
  min-height: 190px;
  border-radius: 0;
  padding: 24px 28px;
}

.signal-feature-grid article {
  border: 0;
  background: transparent;
}

.signal-feature-grid article + article {
  border-left: 1px solid rgba(226, 232, 240, .12);
}

.feature-index {
  display: inline-flex;
  color: var(--signal-gold);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .18em;
  margin-bottom: 28px;
}

.signal-feature-grid h3,
.signal-audience-grid h3 {
  margin: 0 0 12px;
  color: #f4f8ff;
  font-size: 20px;
  line-height: 1.22;
}

.signal-feature-grid p,
.signal-audience-grid p,
.signal-different-grid p,
.signal-synthesis-card p,
.signal-beta li,
.signal-question-grid button,
.signal-footer blockquote {
  color: #c7d4e5;
  line-height: 1.62;
}

.signal-different-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.signal-different-grid article {
  min-height: 160px;
  border-radius: 18px;
  border: 1px solid rgba(226, 232, 240, .11);
  background: linear-gradient(180deg, rgba(8, 20, 38, .62), rgba(4, 10, 22, .64));
  padding: 22px;
}

.signal-different-grid h3 {
  margin: 0 0 10px;
  color: #f7fbff;
  font-size: 18px;
}

.signal-journey-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border: 1px solid rgba(125, 211, 252, .2);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(5, 13, 26, .82);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
}

.signal-journey-strip span {
  position: relative;
  min-height: 116px;
  display: grid;
  align-content: center;
  padding: 18px;
  color: #e8f3ff;
  font-size: 14px;
  font-weight: 850;
  line-height: 1.25;
}

.signal-journey-strip span + span {
  border-left: 1px solid rgba(148, 163, 184, .14);
}

.signal-journey-strip span::before {
  content: "";
  width: 9px;
  height: 9px;
  margin-bottom: 12px;
  border-radius: 999px;
  background: var(--signal-cyan);
  box-shadow: 0 0 22px rgba(125, 211, 252, .72);
}

.signal-journey-strip span:last-child::before {
  background: var(--signal-gold);
  box-shadow: 0 0 24px rgba(245, 211, 106, .72);
}

.signal-synthesis-card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .65fr);
  gap: 28px;
  align-items: center;
  border-radius: 28px;
  padding: clamp(24px, 4vw, 38px);
  background:
    radial-gradient(circle at 82% 24%, rgba(245, 211, 106, .14), transparent 16rem),
    linear-gradient(135deg, rgba(12, 27, 50, .88), rgba(5, 13, 26, .9));
}

.signal-synthesis-card h2 {
  max-width: 700px;
}

.signal-synthesis-meter {
  border-radius: 24px;
  padding: 26px;
  border: 1px solid rgba(245, 211, 106, .32);
  background: rgba(4, 8, 18, .52);
  text-align: center;
}

.signal-synthesis-meter span {
  display: block;
  color: var(--signal-muted);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.signal-synthesis-meter strong {
  display: block;
  margin: 8px 0;
  color: var(--signal-green);
  font-size: clamp(52px, 8vw, 86px);
  line-height: 1;
  text-shadow: 0 0 30px rgba(134, 239, 172, .18);
}

.signal-corpus {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding-top: 10px;
}

.signal-corpus div {
  border-radius: 18px;
  padding: 18px;
}

.signal-corpus span {
  display: block;
  color: var(--signal-dim);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.signal-corpus strong {
  display: block;
  margin-top: 8px;
  color: #f5fbff;
  font-size: 30px;
}

.signal-audience-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.signal-audience-grid article {
  min-height: 170px;
}

.signal-question-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.signal-question-grid button {
  min-height: 78px;
  text-align: left;
  border: 1px solid rgba(148, 163, 184, .18);
  border-radius: 18px;
  background: rgba(5, 13, 26, .68);
  color: #dce9f7;
  font-weight: 750;
  padding: 16px;
}

.signal-question-grid button:hover,
.signal-question-grid button:focus-visible {
  border-color: rgba(245, 211, 106, .52);
  background: rgba(36, 28, 12, .34);
}

.signal-beta {
  display: grid;
  grid-template-columns: minmax(240px, .75fr) minmax(0, 1.25fr);
  gap: 28px;
  border-radius: 26px;
  padding: 28px;
}

.signal-beta ul {
  margin: 0;
  padding-left: 20px;
  columns: 2;
  column-gap: 28px;
}

.signal-footer {
  width: min(1160px, calc(100% - 42px));
  margin: 0 auto;
  padding: 34px 0 70px;
}

.signal-footer blockquote {
  margin: 0;
  border-top: 1px solid rgba(245, 211, 106, .22);
  border-bottom: 1px solid rgba(125, 211, 252, .14);
  padding: 26px 0;
  color: #f4e9bd;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.24;
  text-align: center;
}

.signal-map-accessible {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 980px) {
  .signal-hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .signal-map-shell {
    min-height: 410px;
  }

  .signal-feature-grid,
  .signal-audience-grid,
  .signal-different-grid,
  .signal-question-grid,
  .signal-corpus,
  .signal-synthesis-card,
  .signal-beta {
    grid-template-columns: 1fr;
  }

  .signal-journey-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .signal-hero,
  .signal-section,
  .signal-footer {
    width: min(100% - 24px, 1160px);
  }

  .signal-hero h1 {
    font-size: clamp(58px, 18vw, 84px);
  }

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

  .signal-portal .landing-btn {
    width: 100%;
  }

  .signal-map-shell {
    min-height: 360px;
    border-radius: 22px;
  }

  .signal-map-art text {
    font-size: 15px;
  }

  .signal-map-caption {
    display: none;
  }

  .signal-journey-strip {
    grid-template-columns: 1fr;
  }

  .signal-journey-strip span + span {
    border-left: 0;
    border-top: 1px solid rgba(148, 163, 184, .14);
  }

  .signal-beta ul {
    columns: 1;
  }
}