/* BOUNDARY — Signal Prism theme
 *
 * Obsidian/cobalt foundations; cyan for system information flow; emerald for
 * genuinely verified states; amber for unresolved evidence and human review;
 * coral for discrepancies and rejected authority. Local-only, no remote assets.
 */

:root {
  --obsidian: #0b1220;
  --obsidian-2: #0f172a;
  --cobalt: #131c31;
  --cobalt-2: #1b2740;
  --cyan: #38bdf8;
  --cyan-dim: #1d3a52;
  --emerald: #34d399;
  --emerald-dim: #123a2b;
  --amber: #fbbf24;
  --amber-dim: #3a2c10;
  --coral: #fb7185;
  --coral-dim: #3a151d;
  --text: #e6edf3;
  --text-muted: #9aa8b8;
  --border: #24344f;
  --radius: 8px;
  --radius-lg: 12px;
  --font-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--obsidian);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 1rem;
}

a { color: var(--cyan); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--cobalt-2);
  color: var(--text);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

.site-header {
  background: var(--cobalt);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem;
}
.site-header .brand {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}
.site-header .brand .accent { color: var(--cyan); }
.site-header .tagline {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

h1 { font-size: 1.5rem; margin: 0 0 0.75rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; color: var(--cyan); }
h3 { font-size: 1rem; margin: 0 0 0.25rem; }

.muted { color: var(--text-muted); }
.mono { font-family: var(--font-mono); }

/* Status pills */
.pill {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid;
  white-space: nowrap;
}
.pill--verified { color: var(--emerald); background: var(--emerald-dim); border-color: var(--emerald); }
.pill--hold { color: var(--amber); background: var(--amber-dim); border-color: var(--amber); }
.pill--risk { color: var(--coral); background: var(--coral-dim); border-color: var(--coral); }
.pill--info { color: var(--cyan); background: var(--cyan-dim); border-color: var(--cyan); }
.pill--none { color: var(--text-muted); background: var(--obsidian-2); border-color: var(--border); }

/* Case list */
.case-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}
.case-card {
  background: var(--cobalt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
}
.case-card a {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--text);
}
.case-card a:hover, .case-card a:focus-visible { color: var(--cyan); }
.case-card .meta {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: space-between;
}

/* Trace timeline */
.trace {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  counter-reset: step;
}
.trace-step {
  position: relative;
  background: var(--cobalt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--cyan);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem 0.9rem 1.35rem;
}
.trace-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0.6rem;
  top: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.trace-step--verified { border-left-color: var(--emerald); }
.trace-step--hold { border-left-color: var(--amber); }
.trace-step--risk { border-left-color: var(--coral); }
.trace-step--info { border-left-color: var(--cyan); }

.trace-step .step-title {
  margin: 0 0 0.35rem;
  font-weight: 600;
}
.trace-step .step-note {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.trace-step .step-note--authority {
  color: var(--amber);
  font-weight: 600;
}

/* Definition lists for facts */
.facts {
  margin: 0;
  display: grid;
  gap: 0.25rem;
}
.facts div {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0.75rem;
}
.facts dt { color: var(--text-muted); }
.facts dd { margin: 0; font-family: var(--font-mono); overflow-wrap: anywhere; }

.reason-code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--coral);
  display: inline-block;
  margin: 0.1rem 0.35rem 0.1rem 0;
}

.notice {
  border: 1px solid var(--border);
  border-left: 4px solid var(--cyan);
  background: var(--obsidian-2);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.notice--warn { border-left-color: var(--amber); }
.notice--info { border-left-color: var(--cyan); }

.site-footer {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  color: var(--text-muted);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

/* Site navigation */
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.site-nav a {
  color: var(--cyan);
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
}
.site-nav a:hover, .site-nav a:focus-visible {
  text-decoration: none;
  background: var(--cobalt-2);
}
.site-nav a[aria-current="page"] {
  background: var(--cyan-dim);
  border-color: var(--cyan);
}

/* Data table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
.data-table thead th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
}

/* Homepage hero */
.hero {
  background: linear-gradient(180deg, var(--cobalt) 0%, var(--obsidian) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.5rem 1.25rem;
  margin: 0 0 1.5rem;
}
.hero-title { font-size: 1.4rem; margin: 0 0 0.5rem; color: var(--text); }
.hero-principle { font-style: italic; color: var(--cyan); margin: 0 0 1rem; }
.hero-metrics {
  list-style: none; margin: 0 0 0.75rem; padding: 0;
  display: flex; flex-wrap: wrap; gap: 1rem 1.5rem;
}
.metric { flex: 1 1 9rem; min-width: 9rem; }
.metric-value {
  display: block; font-family: var(--font-mono);
  font-size: 1.6rem; font-weight: 700; color: var(--emerald);
}
.metric-value--none { color: var(--cyan); }
.metric-label { display: block; color: var(--text-muted); font-size: 0.85rem; }
.hero-caveat { font-size: 0.82rem; }

/* How-it-works process strip */
.how { margin: 0 0 1.5rem; }

/* Evidence status labels */
.status-label {
  display: inline-block;
  padding: 0.1rem 0.55rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--obsidian-2);
  vertical-align: middle;
}
.status-label--measured { color: var(--emerald); border-color: var(--emerald); }
.status-label--demonstrated { color: var(--cyan); border-color: var(--cyan); }
.status-label--offline { color: var(--text-muted); border-color: var(--border); }
.status-label--counterfactual { color: var(--amber); border-color: var(--amber); }
.status-label--incomplete { color: var(--coral); border-color: var(--coral); }

.zero-call {
  margin: 0.5rem 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Experiment journey */
.journey {
  list-style: none; margin: 0.75rem 0 0; padding: 0;
  display: grid; gap: 0.5rem;
}
.journey-step {
  background: var(--cobalt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--cyan);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  display: flex; gap: 0.75rem; align-items: baseline; flex-wrap: wrap;
}
.journey-route { font-family: var(--font-mono); font-weight: 700; font-size: 0.85rem; }
.journey-step--deterministic { border-left-color: var(--emerald); }
.journey-step--inference { border-left-color: var(--cyan); }
.journey-step--held { border-left-color: var(--amber); }

.process-strip {
  list-style: none; margin: 0.75rem 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 0.5rem;
}
.process-step {
  flex: 1 1 9rem;
  background: var(--cobalt);
  border: 1px solid var(--border);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius);
  padding: 0.6rem 0.75rem;
}
.process-num {
  display: block; font-family: var(--font-mono);
  font-size: 0.72rem; color: var(--text-muted);
}
.process-name { display: block; font-weight: 600; }
.process-note { display: block; color: var(--text-muted); font-size: 0.82rem; }
.how-list { margin: 0.5rem 0 0; padding-left: 1.25rem; }
.how-list li { margin: 0.35rem 0; }

@media (max-width: 40rem) {
  .facts div { grid-template-columns: 1fr; gap: 0; }
  .facts dt { margin-top: 0.35rem; }
  .site-header { padding: 0.85rem 1rem; }
  main { padding: 1rem 1rem 2.5rem; }
  .data-table { display: block; overflow-x: auto; }
}


/* S4F.14 batch presentation ? extends Signal Prism */
.panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}

.panel-grid > .case-card {
  min-width: 0;
  margin: 0;
}

.panel-grid .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.panel-grid h3 {
  margin-top: 0;
  overflow-wrap: anywhere;
}

/* Historical invoice replay ? read-only disclosure panels */
main details {
  background: var(--cobalt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin: 0.75rem 0;
  padding: 0.9rem 1.1rem;
}

main details summary {
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
}

main details summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

main details[open] summary {
  margin-bottom: 0.75rem;
}

main details .data-table {
  margin-bottom: 0;
}

@media (max-width: 50rem) {
  .panel-grid {
    grid-template-columns: 1fr;
  }
}


/* S4E.25 customer intake */

/* First action visible on the homepage */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  margin: 1.4rem 0 0.85rem;
}

.hero-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-weight: 700;
  text-decoration: none;
  transition: background-color 120ms ease;
}

.hero-action--primary,
.intake-form .button--primary {
  background: var(--cyan);
  color: var(--obsidian);
  border-color: var(--cyan);
}

.hero-action--secondary {
  background: var(--cobalt);
  color: var(--text);
}

.hero-action:hover,
.hero-action:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* Choose a synthetic starting scenario */
.scenario-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  padding: 0;
  margin: 1rem 0 1.6rem;
  list-style: none;
}

.scenario-list li {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 0.4rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--cobalt);
}

.scenario-chip {
  display: inline-block;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.scenario-chip--active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-dim);
}

.scenario-chip:hover,
.scenario-chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* Customer intake form */
.intake-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: 860px;
  padding: 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--cobalt);
  margin-bottom: 1.5rem;
}

.intake-form .field {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 0.4rem;
}

.intake-form label {
  font-weight: 600;
  color: var(--text);
}

.intake-form input {
  box-sizing: border-box;
  width: 100%;
  min-height: 44px;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--obsidian-2);
  color: var(--text);
  font: inherit;
}

.intake-form input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.intake-form .button--primary {
  grid-column: 1 / -1;
  justify-self: start;
  min-height: 46px;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.intake-form .button--primary:hover,
.intake-form .button--primary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

@media (max-width: 44rem) {
  .scenario-list,
  .intake-form {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-action {
    width: 100%;
    box-sizing: border-box;
  }
}