/* Signal Rail. CTEM product surface, public brochure. */

:root {
  color-scheme: dark;
  --bg: #07090d;
  --panel: #10151c;
  --panel-2: #0c1016;
  --line: #232b36;
  --text: #f4f7fb;
  --muted: #8b95a3;
  --faint: #66707c;
  --accent: #4c9dff;
  --accent-pressed: #3b86e0;
  --danger: #f07178;
  --warn: #e6c07b;
  --ok: #9ccc65;
  --sans: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --page: min(1180px, calc(100% - 48px));
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
}

main {
  flex: 1;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-pressed);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -40px;
  background: var(--panel);
  color: var(--accent);
  padding: 8px 12px;
  z-index: 6;
}

.skip:focus {
  top: 10px;
}

.top {
  position: sticky;
  top: 0;
  z-index: 4;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 56px;
  padding: 0 22px;
  background: rgba(7, 9, 13, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  justify-self: start;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.brand:hover {
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav a {
  position: relative;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 0;
}

.nav a:hover {
  color: var(--text);
}

.nav a[aria-current="page"] {
  color: var(--text);
}

.nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.top-end {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

.api-pill {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  background: #0c1117;
}

.glyph {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: inline-grid;
  place-items: center;
  color: var(--muted);
}

.frame {
  width: var(--page);
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 36px;
  align-items: end;
  padding: 46px 0 8px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow .ref {
  color: var(--faint);
}

.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(76, 157, 255, 0.16);
}

h1 {
  margin: 0;
  font-size: clamp(42px, 5.4vw, 64px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 0.98;
}

.lede {
  max-width: 46ch;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.metric {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #121820 0%, #0e1319 100%);
  border-radius: 10px;
  padding: 14px 16px 16px;
}

.kicker {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 0 12px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.kicker i {
  width: 8px;
  height: 8px;
  border: 1px solid var(--faint);
  border-radius: 50%;
  font-style: normal;
}

.metric p {
  margin: 0;
}

.metric-line {
  font-size: 14px;
  line-height: 1.45;
}

.metric-sub {
  margin-top: 8px !important;
  color: var(--faint);
  font-size: 12px;
}

.metric-links {
  display: flex;
  gap: 18px;
  margin-top: 16px !important;
  font-size: 13px;
}

.metric-links a:last-child {
  color: var(--muted);
}

.rails {
  padding: 34px 0 56px;
}

.rails-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 12px;
}

.rails-head h2,
.rails-head p {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.rails-head h2 span {
  color: #3d4654;
}

.bands {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
}

.band {
  display: flex;
  flex-direction: column;
  min-height: 196px;
  padding: 14px 14px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.band:first-child {
  border-left: 2px solid var(--accent);
}

.band-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
}

.num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.band:first-child .num {
  color: var(--accent);
}

.phase {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

.band h3 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.band p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.band-tag {
  margin-top: auto !important;
  padding-top: 18px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

.band:first-child .band-tag {
  color: var(--accent);
}

.doc {
  width: min(72ch, calc(100% - 48px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.doc h1 {
  font-size: 40px;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

.doc p,
.doc li {
  color: var(--muted);
  font-size: 16px;
}

.doc .company,
.doc h1 {
  color: var(--text);
}

.doc a {
  color: var(--accent);
}

.draft {
  display: inline-block;
  margin-left: 10px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  vertical-align: middle;
}

body.sdk .frame {
  width: min(1120px, calc(100% - 40px));
  padding: 28px 0 48px;
}

body.sdk h1 {
  font-size: 42px;
  margin-bottom: 16px;
}

.intro {
  border: 1px solid var(--line);
  background: #0c1117;
  border-radius: 10px;
  padding: 14px 16px 4px;
  margin-bottom: 18px;
}

.intro p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.groups {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0 0 8px;
  padding: 8px 2px 12px;
  border-bottom: 1px solid var(--line);
}

.groups a {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.groups a:hover {
  color: var(--text);
}

.group {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 22px 0 8px;
  margin: 0;
}

.group h2 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.tag,
.schema,
.note,
.company-line {
  color: var(--faint);
}

.tag {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.group > p {
  color: var(--muted);
  font-size: 13px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
  gap: 14px;
  align-items: start;
  margin-top: 12px;
}

.route {
  margin: 0 0 10px;
  padding: 12px 12px 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.route p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.route-line {
  margin: 0 0 6px !important;
  color: var(--text) !important;
}

.verb {
  display: inline-block;
  min-width: 4.6em;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--accent);
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
}

.split > div:last-child {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 14px 6px;
}

.split h3 {
  margin: 0 0 8px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.split > div:last-child p {
  color: var(--muted);
  font-size: 13px;
}

pre {
  background: #090d12;
  color: var(--text);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.5;
  padding: 12px 12px;
  border: 1px solid #1b232e;
  border-radius: 8px;
  overflow: auto;
  margin: 0 0 14px;
}

pre code {
  font-size: 12.5px;
}

pre .k {
  color: var(--accent);
}

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 8px 0 12px;
}

.chip {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 8px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.5;
}

.chip.ok {
  color: var(--ok);
}

.chip.warn {
  color: var(--warn);
}

.chip.danger {
  color: var(--danger);
}

.kinds {
  padding-left: 1.15em;
  color: var(--muted);
}

.kinds li {
  margin: 0 0 3px;
}

.omitted {
  border-top: 1px solid var(--line);
  margin-top: 28px;
  padding-top: 8px;
}

.omitted p {
  color: var(--muted);
  font-size: 13px;
}

.foot {
  border-top: 1px solid var(--line);
  background: #080b10;
}

.foot-bar {
  width: var(--page);
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 14px 0;
}

.foot-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
}

.foot-name {
  font-weight: 600;
  letter-spacing: 0.01em;
}

.sys {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 6px;
}

.foot-mail {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.foot-role {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.foot nav {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}

.foot nav a {
  color: var(--muted);
  font-size: 13px;
}

.foot nav a[aria-current="page"] {
  color: var(--text);
}

.sep {
  color: #3a4452;
}

.foot .note {
  width: var(--page);
  margin: 0 auto;
  padding: 0 0 14px;
  color: var(--faint);
  font-size: 12px;
}

@media (max-width: 980px) {
  .top {
    grid-template-columns: 1fr auto;
    height: auto;
    min-height: 56px;
    padding: 10px 16px;
    row-gap: 8px;
  }

  .nav {
    grid-column: 1 / -1;
    order: 3;
    gap: 16px;
    flex-wrap: wrap;
  }

  .hero,
  .bands,
  .split {
    grid-template-columns: 1fr;
  }

  .foot-bar {
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .foot nav {
    margin-left: 0;
  }

  h1 {
    font-size: 36px;
  }
}