:root {
  --bg: #081014;
  --bg-2: #0d1a21;
  --ink: #f3f5ef;
  --muted: #9fb0b7;
  --line: rgba(123, 146, 152, 0.2);
  --line-strong: rgba(136, 241, 139, 0.36);
  --accent: #88f18b;
  --accent-2: #59b8ff;
  --accent-3: #ffd166;
  --danger: #ff6c63;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at top right, rgba(89, 184, 255, 0.14), transparent 26rem),
    radial-gradient(circle at bottom left, rgba(136, 241, 139, 0.12), transparent 28rem),
    linear-gradient(180deg, #091116 0%, #0a1419 100%);
  color: var(--ink);
  font-family: "Manrope", sans-serif;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.signal-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(110, 132, 139, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 132, 139, 0.08) 1px, transparent 1px);
  background-size: 3.4rem 3.4rem;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.28));
}

.concept-bar,
.signal-main,
.site-footer,
.legal-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.concept-bar {
  padding: 1.2rem 0 0;
  display: flex;
  justify-content: flex-start;
  gap: 1rem;
  align-items: flex-start;
}

.brand {
  display: inline-block;
  font-family: "Oxanium", sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
}

.top-link {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 0.55rem 0.9rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
}

.hero-actions,
.hero-meta,
.site-footer div,
.legal-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.signal-main {
  padding: 2.4rem 0 4rem;
}

.signal-hero,
.signal-rails,
.signal-details,
.pricing-section,
.signup-section,
.legal-shell {
  border-top: 1px solid var(--line);
}

.signal-hero,
.signal-rails,
.signal-details,
.pricing-section,
.signup-section {
  padding: 2.5rem 0;
}

.eyebrow,
.hero-meta span,
.rail-stop,
.button,
.legal-home {
  font-family: "IBM Plex Mono", monospace;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Oxanium", sans-serif;
  line-height: 0.98;
}

h1 {
  margin-top: 0.85rem;
  max-width: 15ch;
  font-size: clamp(3.2rem, 8vw, 6.6rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.3rem);
}

h3 {
  font-size: 1.1rem;
}

.subhead,
.rail-copy p,
.detail-intro p,
.detail-item p,
.signup-copy p,
.site-footer,
.legal-shell p {
  color: var(--muted);
  line-height: 1.72;
}

.subhead {
  max-width: 44rem;
  margin: 1rem 0 1.2rem;
  font-size: 1.1rem;
}

.hero-meta {
  gap: 0.7rem 1rem;
  margin-bottom: 1.4rem;
}

.hero-meta span {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero-meta span::before {
  content: "";
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  margin-right: 0.5rem;
  background: var(--accent);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1rem;
  border: 1px solid transparent;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  cursor: pointer;
}

.button-primary {
  background: linear-gradient(90deg, var(--accent), #b5ff8a);
  color: #0a150e;
}

.button-ghost {
  border-color: var(--line);
  background: transparent;
}

.signal-rails {
  display: grid;
  gap: 0;
}

.rail-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.68fr) minmax(320px, 1.1fr) minmax(260px, 0.82fr);
  gap: 1.2rem;
  align-items: start;
  padding: 1.4rem 0;
}

.rail-row + .rail-row {
  border-top: 1px solid var(--line);
}

.rail-copy h2 {
  margin: 0.55rem 0 0.65rem;
}

.rail-diagram {
  padding-top: 0.35rem;
}

.rail-chain {
  --rail-gap: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--rail-gap);
  min-height: 4rem;
}

.rail-stop {
  position: relative;
  padding-top: 1.25rem;
  color: var(--ink);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.rail-stop::before {
  content: "";
  position: absolute;
  top: 0.15rem;
  left: 0;
  width: 0.6rem;
  height: 0.6rem;
  background: var(--accent);
  box-shadow: 0 0 0 8px rgba(136, 241, 139, 0.08);
}

.rail-stop:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 0.45rem;
  left: 0.3rem;
  width: calc(100% + var(--rail-gap));
  height: 1px;
  background: linear-gradient(90deg, rgba(136, 241, 139, 0.34), rgba(255, 209, 102, 0.28));
}

.rail-chain-inbound .rail-stop::before {
  background: var(--accent-2);
  box-shadow: 0 0 0 8px rgba(89, 184, 255, 0.08);
}

.rail-chain-inbound .rail-stop:not(:last-child)::after {
  background: linear-gradient(90deg, rgba(89, 184, 255, 0.34), rgba(136, 241, 139, 0.28));
}

pre {
  margin: 0;
  padding: 0 0 0 1rem;
  overflow: auto;
  border-left: 1px solid var(--line);
  color: #dbe9ea;
  background: transparent;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
}

.signal-details {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 1.2rem;
  align-items: start;
}

.detail-intro h2 {
  margin: 0.65rem 0;
}

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

.detail-item {
  padding-left: 1rem;
  border-left: 1px solid var(--line);
}

.detail-item h3 {
  margin-bottom: 0.55rem;
}

.pricing-section {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(320px, 1.28fr);
  gap: 1.2rem;
  align-items: start;
}

.pricing-copy h2 {
  margin: 0.65rem 0;
}

.pricing-copy p,
.pricing-row span {
  color: var(--muted);
  line-height: 1.72;
}

.pricing-note {
  max-width: 32rem;
  margin-top: 0.8rem;
  font-size: 0.94rem;
}

.pricing-table {
  display: grid;
}

.pricing-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.8fr) minmax(180px, 1.2fr) minmax(120px, 0.7fr);
  gap: 1rem;
  align-items: center;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}

.pricing-head {
  padding-top: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.pricing-row strong {
  font-size: 1rem;
}

.signup-section {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(320px, 1.28fr);
  gap: 1.2rem;
  align-items: start;
}

.signup-copy h2 {
  margin: 0.65rem 0;
}

.signup-closed-card {
  display: grid;
  gap: 1rem;
  padding: 1.2rem 0 0;
  border-top: 1px solid var(--line);
}

.signup-closed-title {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.signup-closed-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

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

label {
  display: grid;
  gap: 0.35rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}

input,
textarea,
select {
  width: 100%;
  border: 0;
  padding: 0.2rem 0 0;
  font: inherit;
  color: var(--ink);
  background: transparent;
}

textarea {
  min-height: 7rem;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: #7c9198;
}

.consent {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  color: var(--muted);
}

.consent input {
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.12rem;
  flex: 0 0 auto;
}

.form-actions {
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
}

.form-status {
  min-height: 1.2rem;
  margin: 0;
}

.form-status.error {
  color: var(--danger);
}

.form-status.ok {
  color: var(--accent);
}

.site-footer {
  padding: 1.4rem 0 2.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.site-footer a,
.legal-actions a {
  text-decoration: none;
}

.site-footer a:hover,
.top-link:hover,
.legal-actions a:hover {
  color: var(--accent);
}

.legal-page {
  background:
    radial-gradient(circle at top right, rgba(89, 184, 255, 0.12), transparent 20rem),
    linear-gradient(180deg, #091116 0%, #0c151b 100%);
}

.legal-shell {
  margin-top: 3rem;
  padding: 2rem 0;
}

.legal-home {
  text-decoration: none;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.legal-shell h1 {
  margin-top: 0.6rem;
  font-size: clamp(2.1rem, 5vw, 4rem);
  font-family: "Oxanium", sans-serif;
}

.legal-actions {
  margin-top: 1.5rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 500ms ease, transform 500ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .concept-bar,
  .site-footer,
  .signal-details,
  .pricing-section,
  .signup-section {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .rail-row {
    grid-template-columns: 1fr;
  }

  .detail-list {
    grid-template-columns: 1fr;
  }

  .pricing-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .detail-item {
    padding-left: 0;
    padding-top: 0.9rem;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  .signal-main {
    padding-top: 1.8rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .rail-chain {
    grid-template-columns: 1fr;
    --rail-gap: 0.75rem;
    padding-left: 1.1rem;
  }

  .rail-stop {
    padding-top: 0;
    padding-left: 1rem;
  }

  .rail-stop::before {
    top: 0.2rem;
    left: -0.05rem;
  }

  .rail-stop:not(:last-child)::after {
    top: 0.2rem;
    left: 0.25rem;
    width: 1px;
    height: calc(100% + var(--rail-gap));
    background: linear-gradient(180deg, rgba(136, 241, 139, 0.34), rgba(255, 209, 102, 0.28));
  }

  .rail-chain-inbound .rail-stop:not(:last-child)::after {
    background: linear-gradient(180deg, rgba(89, 184, 255, 0.34), rgba(136, 241, 139, 0.28));
  }

  .form-actions {
    align-items: flex-start;
  }
}