/* QuorumLatch — industrial control surface. Copyright 2026 Dreamway Express LLC. */

:root {
  --bg: #07090b;
  --bg-elev: #0c1114;
  --bg-paper: #10161b;
  --cyan: #2ec8c0;
  --cyan-2: #5ee0d8;
  --cyan-3: #a8f3ee;
  --cyan-dim: #1a7a76;
  --cyan-line: rgba(46, 200, 192, 0.28);
  --steel: #8fa3b3;
  --ink: #e8eef2;
  --ink-dim: #9aabba;
  --ink-mute: #6a7a88;
  --rule: rgba(232, 238, 242, 0.08);
  --danger: #c45a3a;
  --sans: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --measure: 42.5rem;
  --wide: 70rem;
  --gutter: clamp(1.15rem, 4vw, 2.4rem);
  --header-h: 4.15rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16.5px;
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 480px at 88% -12%, rgba(46, 200, 192, 0.07), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.02rem;
  line-height: 1.62;
  font-weight: 400;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--cyan-2);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--cyan-3);
}

:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip:focus {
  left: var(--gutter);
  top: 0.5rem;
  z-index: 100;
  background: var(--bg);
  padding: 0.4rem 0.7rem;
}

.wrap {
  width: min(var(--wide), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.measure {
  width: min(var(--measure), 100%);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(7, 9, 11, 0.92);
  border-bottom: 1px solid var(--cyan-line);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
  flex: 0 0 auto;
}

.logo-mark {
  display: block;
  height: 42px;
  width: 42px;
  object-fit: cover;
  flex: 0 0 auto;
  border-radius: 50%;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-kicker {
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.brand-name {
  font-family: var(--sans);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.nav-toggle {
  display: none;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--cyan-line);
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.site-nav a {
  font-family: var(--sans);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-dim);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--cyan-2);
}

/* Hero / page heads */

.hero,
.page-head {
  padding: clamp(2.6rem, 7vw, 5.2rem) 0 2.4rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48'%3E%3Cpath fill='none' stroke='%232ec8c0' stroke-opacity='0.08' stroke-width='0.7' d='M0 24 H48 M24 0 V48'/%3E%3C/svg%3E");
  mask-image: linear-gradient(180deg, rgba(0,0,0,.5), transparent 78%);
  pointer-events: none;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 1.1rem;
}

h1, h2, h3 {
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: -0.028em;
  line-height: 1.12;
  color: var(--ink);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.15rem);
  margin: 0 0 1.1rem;
  max-width: 20ch;
}

.page-head h1 {
  max-width: 22ch;
}

.lede {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--ink-dim);
  max-width: 40rem;
  margin: 0;
}

.lede strong {
  color: var(--ink);
  font-weight: 600;
}

/* Sections */

.section {
  padding: clamp(2.4rem, 5.5vw, 4.2rem) 0;
  border-bottom: 1px solid var(--rule);
}

.section h2 {
  font-size: clamp(1.45rem, 2.8vw, 1.95rem);
  margin: 0 0 0.85rem;
}

.section h3 {
  font-size: 1.18rem;
  margin: 1.6rem 0 0.5rem;
}

.section p,
.prose p {
  margin: 0 0 1rem;
  color: var(--ink-dim);
}

.section p:last-child,
.prose p:last-child {
  margin-bottom: 0;
}

.prose {
  max-width: var(--measure);
}

.prose li,
.facts li {
  color: var(--ink-dim);
}

.cyan-rule {
  width: 4.5rem;
  height: 1px;
  background: var(--cyan);
  border: 0;
  margin: 1.6rem 0;
}

/* Numbered claims */

.claims {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.claims li {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0.9rem;
  align-items: start;
  color: var(--ink);
  font-size: 1.04rem;
}

.claims .n {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 0.28rem;
}

/* Primitive cards */

.signal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14.5rem, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.signal {
  border: 1px solid var(--cyan-line);
  background: var(--bg-paper);
  padding: 1.15rem 1.2rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  text-decoration: none;
  color: inherit;
  min-height: 100%;
}

.signal:hover {
  border-color: var(--cyan);
  color: inherit;
}

.signal .idx {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.signal h3 {
  margin: 0;
  font-size: 1.16rem;
}

.signal p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--ink-dim);
}

/* Two column */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(1.4rem, 4vw, 3rem);
  align-items: start;
}

.split-copy p {
  color: var(--ink-dim);
}

figure.shot {
  margin: 0;
}

figure.shot img {
  width: 100%;
  border: 1px solid var(--cyan-line);
}

figcaption {
  font-family: var(--sans);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-top: 0.55rem;
}

/* Tables / facts */

.facts {
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.facts li {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.98rem;
}

.facts strong {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-top: 0.2rem;
}

.note {
  font-size: 0.92rem;
  color: var(--ink-mute);
}

.banner {
  border: 1px solid var(--cyan-line);
  background: var(--bg-elev);
  padding: 1.3rem 1.4rem;
  margin-top: 1.6rem;
}

.banner p {
  margin: 0;
  color: var(--ink);
  font-size: 1.06rem;
}

.banner .verb {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.45rem;
}

.close {
  background:
    linear-gradient(180deg, rgba(46, 200, 192, 0.05), transparent 40%),
    var(--bg);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.4rem;
  margin-top: 1.4rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cta-row a {
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 0.12rem;
  color: var(--cyan-2);
}

/* Trace diagram */

.trace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.6rem;
}

.trace-pane {
  border: 1px solid var(--rule);
  background: var(--bg-elev);
  padding: 1.1rem 1.15rem 1.2rem;
  min-height: 100%;
}

.trace-pane h3 {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  letter-spacing: 0;
}

.trace-pane.latched {
  border-color: var(--cyan-line);
}

.bars {
  display: grid;
  gap: 0.45rem;
}

.bar {
  height: 10px;
  border-radius: 1px;
  background: var(--ink-mute);
  opacity: 0.45;
}

.bar.break {
  background: var(--danger);
  opacity: 0.85;
  width: 62%;
}

.bar.ghost {
  opacity: 0.18;
  width: 40%;
}

.bar.ok {
  background: var(--cyan);
  opacity: 0.9;
}

.bar.ok:nth-child(1) { width: 92%; }
.bar.ok:nth-child(2) { width: 86%; }
.bar.ok:nth-child(3) { width: 78%; }
.bar.ok:nth-child(4) { width: 70%; }
.bar.ok:nth-child(5) { width: 64%; }

.hash {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--cyan-dim);
  margin-top: 0.85rem;
}

.trace-label {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 0.55rem;
}

/* Footer */

.site-footer {
  padding: 2.2rem 0 2.6rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--ink-mute);
  line-height: 1.55;
}

.footer-inner {
  display: grid;
  gap: 0.7rem;
}

.site-footer .copyright {
  color: var(--ink-dim);
  margin: 0;
}

.site-footer .marks,
.site-footer p {
  margin: 0;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.2rem;
  margin-top: 0.4rem;
}

.footer-nav a {
  color: var(--ink-dim);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--cyan-2);
}

/* Inner article extras */

.term-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0 0;
  font-size: 0.95rem;
}

.term-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 500;
  padding: 0.65rem 0.8rem 0.65rem 0;
  border-bottom: 1px solid var(--cyan-line);
}

.term-table td {
  padding: 0.85rem 0.9rem 0.85rem 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  color: var(--ink-dim);
}

.term-table td:first-child {
  font-family: var(--sans);
  color: var(--ink);
  font-weight: 500;
  white-space: nowrap;
  padding-right: 1.2rem;
  width: 14rem;
}

.not-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.not-list li {
  padding: 0.45rem 0 0.45rem 1.1rem;
  position: relative;
  color: var(--ink-dim);
  border-bottom: 1px solid var(--rule);
}

.not-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cyan-dim);
}

.legal h2 {
  font-size: 1.15rem;
  margin-top: 2rem;
}

code, .mono {
  font-family: var(--mono);
  font-size: 0.88em;
}

pre {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.5;
  background: var(--bg-elev);
  border: 1px solid var(--cyan-line);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  color: var(--ink);
  margin: 1rem 0;
}

.prose pre {
  max-width: 100%;
}

.status-row {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 0.8rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.95rem;
}

.status-row .st {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-top: 0.2rem;
}

/* 404 */

.not-found {
  padding: 18vh 0 30vh;
}

.not-found h1 {
  max-width: none;
}

/* Responsive */

@media (max-width: 860px) {
  .split,
  .trace {
    grid-template-columns: 1fr;
  }
  .split {
    display: flex;
    flex-direction: column;
  }
  .split .split-copy {
    order: 1;
  }
  .split figure.shot {
    order: 2;
  }
  .facts li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .term-table td:first-child {
    display: block;
    white-space: normal;
    width: auto;
    padding-bottom: 0.15rem;
  }
  .term-table td {
    display: block;
    border-bottom: 0;
  }
  .term-table tr {
    display: block;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--rule);
  }
  .status-row {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

@media (max-width: 720px) {
  html { font-size: 16px; }
  .nav-toggle { display: inline-block; }
  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: #0b1014;
    border-bottom: 1px solid var(--cyan-line);
    padding: 0.4rem 0 0.8rem;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a {
    display: block;
    width: 100%;
    padding: 0.75rem var(--gutter);
  }
  .header-inner { position: relative; }
  h1 { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}