/* IncidentLens — interface styles.
 *
 * This is an instrument, not a landing page: dense, quiet, and precise. The one
 * idea the palette carries is the product's own thesis — every claim is either a
 * fact, a lead, or an admitted gap — so the accent colour IS the "confirmed"
 * colour, "inferred" is amber, and "unknown" is rendered as dashed absence
 * rather than as a hue. Status is encoded in form as well as in words.
 *
 * Shared by the reconstructor (index.html) and the incident library
 * (gallery.html) so the two read as one product.
 */

/* ------------------------------------------------------------------ tokens */

:root {
  color-scheme: dark light;

  /* Slate with a blue bias, so the neutrals belong to the accent. */
  --ground: #0b0f15;
  --ground-sunk: #080b10;
  --surface: #121821;
  --surface-2: #182028;
  --hairline: #1f2833;
  --hairline-soft: #172029;
  --ink: #dce3ed;
  --ink-mute: #808c9d;
  --ink-faint: #5c6675;

  /* Epistemic status. --fact doubles as the UI accent. */
  --fact: #4c8dff;
  --lead: #dfa03c;
  --fail: #e5573f;
  --well: #35a06d;
  --recover: #3fb3a6;

  --fact-wash: rgba(76, 141, 255, 0.09);
  --lead-wash: rgba(223, 160, 60, 0.08);
  --fail-wash: rgba(229, 87, 63, 0.09);

  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo,
    Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;

  --r-sm: 6px;
  --r-md: 9px;
  --r-lg: 13px;

  --gutter: clamp(16px, 3vw, 32px);
  --measure: 72ch;

  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -12px rgba(0, 0, 0, 0.5);

  /* Back-compat aliases: app.js and the SVG rules use the older names. */
  --bg: var(--ground);
  --panel: var(--surface);
  --panel-2: var(--surface-2);
  --line: var(--hairline);
  --text: var(--ink);
  --dim: var(--ink-mute);
  --accent: var(--fact);
  --healthy: var(--well);
  --warning: var(--lead);
  --critical: var(--fail);
  --recovery: var(--recover);
}

@media (prefers-color-scheme: light) {
  :root {
    --ground: #f4f6fa;
    --ground-sunk: #eaeef4;
    --surface: #ffffff;
    --surface-2: #f2f5f9;
    --hairline: #dde3ec;
    --hairline-soft: #e8edf3;
    --ink: #0f1720;
    --ink-mute: #57626f;
    --ink-faint: #7b8694;

    --fact: #1f6feb;
    --lead: #9a6205;
    --fail: #c9372c;
    --well: #1a7f4f;
    --recover: #12796f;

    --fact-wash: rgba(31, 111, 235, 0.06);
    --lead-wash: rgba(154, 98, 5, 0.07);
    --fail-wash: rgba(201, 55, 44, 0.06);

    --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 8px 24px -14px rgba(16, 24, 40, 0.18);
  }
}

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

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--fact); text-underline-offset: 2px; }

h1, h2, h3 { text-wrap: balance; letter-spacing: -0.011em; }

code, kbd, samp, pre, .mono { font-family: var(--mono); }

/* Digits line up everywhere they are compared. */
.mono, .clock, .meta, .frame-count, .eyebrow, .chip, .badge,
.caption-evidence, td, .lands { font-variant-numeric: tabular-nums; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.hidden { display: none !important; }

/* ------------------------------------------------------------------ chrome */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 12px var(--gutter);
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}

.brand { display: flex; align-items: baseline; gap: 12px; min-width: 0; }

/* Three ticks: fail, lead, well — the same vocabulary as the analysis. */
.mark {
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--fail);
  box-shadow: 11px 0 0 var(--lead), 22px 0 0 var(--well);
  display: inline-block;
  margin-right: 24px;
  transform: translateY(-1px);
  flex: none;
}

.name {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.tag {
  color: var(--ink-mute);
  font-size: 12.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ------------------------------------------------------------------ controls */

select,
button,
input[type="text"],
textarea {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  padding: 7px 11px;
  transition: border-color 0.14s ease, background 0.14s ease, color 0.14s ease;
}

select { max-width: min(46vw, 460px); }
button { cursor: pointer; }
button:hover:not(:disabled),
select:hover { border-color: var(--ink-faint); }

:focus-visible {
  outline: 2px solid var(--fact);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

button.primary {
  background: var(--fact);
  border-color: var(--fact);
  color: #fff;
  font-weight: 600;
}
button.primary:hover:not(:disabled) {
  background: color-mix(in srgb, var(--fact) 88%, #000);
  border-color: color-mix(in srgb, var(--fact) 88%, #000);
}
button.primary:disabled { opacity: 0.55; cursor: progress; }

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

button.icon {
  padding: 6px 9px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1;
}

.navlink {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 5px 11px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  text-decoration: none;
  color: inherit;
  font-size: 12.5px;
  line-height: 1.3;
  white-space: nowrap;
}
.navlink:hover { border-color: var(--fact); color: var(--fact); }
.navlink-sub { font-size: 10px; color: var(--ink-faint); letter-spacing: 0.01em; }

a.btn {
  font-size: 12.5px;
  padding: 6px 11px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
}
a.btn:hover { border-color: var(--fact); color: var(--fact); }

/* ------------------------------------------------------------------ layout */

main {
  max-width: 1240px;
  margin: 0 auto;
  padding: var(--gutter);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 6px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
}

.empty {
  padding: 26px 28px;
  border: 1px dashed var(--hairline);
  border-radius: var(--r-lg);
  color: var(--ink-mute);
  max-width: var(--measure);
}
.empty p { margin: 0 0 10px; }
.empty p:last-child { margin-bottom: 0; }

.notice {
  padding: 12px 15px;
  border-left: 2px solid var(--fact);
  background: var(--fact-wash);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 13.5px;
  max-width: var(--measure);
}
.notice p { margin: 0; }

/* ------------------------------------------------------------- replay stage */

#stage-panel {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 18px 20px 14px;
  box-shadow: var(--shadow);
}

.incident-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
}

.incident-head h1 {
  margin: 0 0 5px;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.25;
}

.impact {
  margin: 0;
  color: var(--lead);
  font-size: 13.5px;
  max-width: var(--measure);
}

.clock {
  font-family: var(--mono);
  font-size: clamp(17px, 2.6vw, 22px);
  font-weight: 600;
  color: var(--fact);
  white-space: nowrap;
  letter-spacing: -0.02em;
}

#graph-wrap {
  margin: 16px 0 12px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  background:
    radial-gradient(ellipse at 50% -30%, var(--surface-2) 0%, transparent 62%),
    var(--ground-sunk);
  overflow-x: auto;
}

#graph { display: block; width: 100%; min-width: 640px; height: auto; }

.node rect {
  fill: var(--surface-2);
  stroke: var(--hairline);
  stroke-width: 1.4;
  transition: fill 0.35s ease, stroke 0.35s ease;
}
.node text { font-family: var(--mono); fill: var(--ink); font-size: 12px; }
.node .owner { fill: var(--ink-faint); font-size: 10px; }

.node.healthy rect { stroke: color-mix(in srgb, var(--well) 55%, var(--hairline)); }
.node.warning rect { stroke: var(--lead); fill: var(--lead-wash); }
.node.critical rect { stroke: var(--fail); fill: var(--fail-wash); }
.node.recovery rect { stroke: var(--recover); fill: transparent; }
.node.critical rect { animation: pulse 1.4s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { stroke-width: 1.4; }
  50% { stroke-width: 3; }
}

.edge {
  stroke: var(--hairline);
  stroke-width: 1.4;
  fill: none;
  transition: stroke 0.35s ease;
}
.edge.active {
  stroke: var(--fail);
  stroke-width: 2.4;
  stroke-dasharray: 6 5;
  animation: flow 0.9s linear infinite;
}

@keyframes flow { to { stroke-dashoffset: -11; } }

.transport { display: flex; align-items: center; gap: 9px; }
.transport input[type="range"] { flex: 1; accent-color: var(--fact); min-width: 80px; }

.frame-count {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  white-space: nowrap;
}

.caption {
  margin-top: 12px;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 12px;
  min-height: 78px;
}
.caption-title { margin: 0; font-weight: 600; font-size: 14.5px; }
.caption-body {
  margin: 4px 0 0;
  color: var(--ink-mute);
  font-size: 13.5px;
  max-width: var(--measure);
}
.caption-evidence {
  margin: 7px 0 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--fact);
}

/* ------------------------------------------------------------- detail panel */

.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--hairline);
  flex-wrap: wrap;
}

.tabs button {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  color: var(--ink-mute);
  padding: 9px 13px;
  font-size: 13px;
}
.tabs button:hover { color: var(--ink); }
.tabs button.active {
  color: var(--ink);
  border-bottom-color: var(--fact);
  font-weight: 600;
}

/* Tab PANELS. Distinct from the segmented control below — these two shared a
 * class name once, which hid one control entirely. */
.tab { display: none; padding-top: 18px; }
.tab.active { display: block; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}

article {
  background: var(--surface-2);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--r-md);
  padding: 13px 15px;
}
article h3 { margin: 5px 0; font-size: 14.5px; }
article p { margin: 4px 0; font-size: 13.5px; max-width: var(--measure); }
article small {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 10.5px;
  word-break: break-word;
}

.meta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 3px;
  border: 1px solid var(--ink-faint);
  color: var(--ink-faint);
}
.badge.confirmed { border-color: var(--fact); color: var(--fact); background: var(--fact-wash); }
.badge.inferred { border-color: var(--lead); color: var(--lead); background: var(--lead-wash); }
/* Absence, drawn as absence. */
.badge.unknown { border-style: dashed; background: none; }

.severity { border-left: 2px solid var(--hairline); }
.severity.info { border-left-color: var(--well); }
.severity.warning { border-left-color: var(--lead); }
.severity.critical { border-left-color: var(--fail); }
.severity.recovery { border-left-color: var(--recover); }

.confbar {
  height: 4px;
  border-radius: 2px;
  background: var(--hairline);
  overflow: hidden;
  margin: 9px 0 4px;
}
.confbar span { display: block; height: 100%; background: var(--fact); }

.arrow { color: var(--ink-faint); font-family: var(--mono); }

/* ---------------------------------------------------------------- sandbox */

.sandbox {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 18px 20px 20px;
}

.sandbox-head h2 { margin: 0 0 4px; font-size: 16px; }
.sandbox-head p {
  margin: 0 0 15px;
  font-size: 13.5px;
  color: var(--ink-mute);
  max-width: var(--measure);
}

/* Segmented control. Deliberately NOT .tab — see the note above. */
.seg-group {
  display: inline-flex;
  padding: 2px;
  gap: 2px;
  margin-bottom: 14px;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
}
.seg {
  font-size: 12.5px;
  padding: 6px 13px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--ink-mute);
}
.seg:hover { color: var(--ink); }
.seg.active {
  background: var(--surface);
  border-color: var(--hairline);
  color: var(--ink);
  font-weight: 600;
}

.pane > label {
  display: block;
  font-size: 12.5px;
  color: var(--ink-mute);
  margin-bottom: 8px;
  max-width: var(--measure);
}

.pane textarea {
  width: 100%;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.65;
  padding: 11px 13px;
  border-radius: var(--r-md);
  resize: vertical;
  background: var(--ground-sunk);
}
.pane textarea::placeholder { color: var(--ink-faint); }
.pane textarea:focus { border-color: var(--fact); outline: none; }

.sandbox-row { display: flex; align-items: center; gap: 9px; margin-top: 11px; flex-wrap: wrap; }
.sandbox-row input[type="text"] { width: 168px; font-family: var(--mono); font-size: 12.5px; }

.hint { font-size: 11.5px; color: var(--ink-faint); }

.disclose {
  margin: 13px 0 0;
  padding: 10px 13px;
  border-left: 2px solid var(--lead);
  background: var(--lead-wash);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 12.5px;
  max-width: 80ch;
}

.sandbox-status {
  margin: 13px 0 0;
  padding: 9px 13px;
  border-radius: var(--r-sm);
  border: 1px solid var(--hairline);
  font-size: 12.5px;
}
.sandbox-status.ok { border-color: color-mix(in srgb, var(--fact) 45%, var(--hairline)); }
.sandbox-status.bad {
  border-color: color-mix(in srgb, var(--fail) 45%, var(--hairline));
  color: var(--fail);
}

/* --------------------------------------------------------- incident library */

.library-head {
  max-width: 1240px;
  margin: 0 auto;
  padding: 26px var(--gutter) 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: baseline;
  border-bottom: 1px solid var(--hairline);
}
.library-head h1 { margin: 0 0 3px; font-size: 21px; }
.library-head p { margin: 0; color: var(--ink-mute); font-size: 13.5px; }
.src { margin-left: auto; font-size: 11.5px; color: var(--ink-faint); }
.src code { color: var(--fact); }

.section-label {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-faint);
  margin: 4px 0 0;
  font-weight: 500;
}

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--ink-faint); }

.card img,
.card video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background: var(--ground-sunk);
  border-bottom: 1px solid var(--hairline);
}
.card img { cursor: pointer; }
.card img:hover { opacity: 0.93; }

.card .body { padding: 13px 15px 15px; display: flex; flex-direction: column; gap: 9px; }
.card h3 { margin: 0; font-size: 14.5px; text-transform: capitalize; }

.lands {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fact);
  word-break: break-all;
  line-height: 1.45;
}

.facts { display: flex; flex-wrap: wrap; gap: 5px; }

.chip {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: 3px;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  color: var(--ink-mute);
}
.chip.confirmed { color: var(--fact); border-color: color-mix(in srgb, var(--fact) 40%, var(--hairline)); }
.chip.inferred { color: var(--lead); border-color: color-mix(in srgb, var(--lead) 40%, var(--hairline)); }
.chip.unknown { border-style: dashed; }

.row { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 2px; }

.prov {
  margin-top: 4px;
  padding: 11px 12px;
  border-radius: var(--r-md);
  background: var(--ground-sunk);
  border: 1px solid var(--hairline);
  font-size: 11.5px;
  display: none;
}
.prov.open { display: block; }
.prov dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 14px;
}
.prov dt { color: var(--ink-faint); }
.prov dd { margin: 0; word-break: break-all; font-family: var(--mono); }

.library-foot {
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px var(--gutter) 44px;
  border-top: 1px solid var(--hairline);
  color: var(--ink-faint);
  font-size: 12.5px;
  max-width: min(1240px, 90ch);
}

/* ------------------------------------------------------------------ small */

@media (max-width: 760px) {
  .incident-head { flex-direction: column; }
  .tag { display: none; }
  .navlink-sub { display: none; }
  main { gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .node.critical rect { animation: none; }
  .edge.active { animation: none; stroke-dasharray: none; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}

/* Gallery grid rhythm: section label then cards, laid out with gap only. */
.lib-out { display: flex; flex-direction: column; gap: 12px; }
.lib-out .grid { margin-bottom: 10px; }
.lib-out .section-label:not(:first-child) { margin-top: 18px; }

/* ------------------------------------------------------------------- intro */

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 1fr);
  gap: clamp(20px, 3vw, 38px);
  align-items: start;
  padding: 6px 0 2px;
}

.intro-h {
  margin: 0 0 12px;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.14;
  letter-spacing: -0.021em;
  max-width: 24ch;
}

.intro-lede {
  margin: 0 0 10px;
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--ink);
  max-width: 60ch;
}
.intro-lede em { font-style: normal; color: var(--fact); }

.intro-body {
  margin: 0;
  font-size: 14px;
  color: var(--ink-mute);
  max-width: 68ch;
}
.intro-body .badge { vertical-align: 1px; margin: 0 1px; }
.intro-body strong { color: var(--ink); }

/* Three ways in. */
/* Equal columns so three entry points read as one set, not two plus an orphan. */
.cta-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
  gap: 9px;
  margin-top: 18px;
  max-width: 760px;
}

.cta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 9px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  background: var(--surface);
  color: inherit;
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 600;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.cta:hover { border-color: var(--fact); background: var(--fact-wash); }
.cta-sub { font-size: 11px; font-weight: 400; color: var(--ink-faint); }

.cta-key {
  border-color: color-mix(in srgb, var(--fact) 55%, var(--hairline));
  background: var(--fact-wash);
}
.cta-key:hover { border-color: var(--fact); }

.intro-tech {
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--fact);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
  background: var(--surface);
  padding: 16px 18px;
}
.intro-tech dl { margin: 0; display: flex; flex-direction: column; gap: 11px; }
.intro-tech dt {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
}
.intro-tech dd {
  margin: 2px 0 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-mute);
}
.intro-tech code { font-size: 11.5px; color: var(--fact); }
.intro-tech strong { color: var(--ink); }

/* ------------------------------------------------------------- B2 strip */

.b2strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(18px, 2.6vw, 30px);
  align-items: center;
  padding: 18px 20px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  background: var(--surface);
}
.b2strip h2 { margin: 0 0 8px; font-size: 17px; }
.b2strip p { margin: 0 0 14px; font-size: 13.5px; color: var(--ink-mute); max-width: 62ch; }
.b2strip p strong { color: var(--ink); }
.b2strip .cta { display: inline-flex; }

.b2strip-posters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.b2strip-posters a {
  display: block;
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  overflow: hidden;
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.b2strip-posters a:hover { border-color: var(--fact); transform: translateY(-2px); }
.b2strip-posters img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background: var(--ground-sunk);
}
.b2strip-posters .poster-label {
  display: block;
  padding: 6px 8px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.03em;
  color: var(--ink-mute);
  border-top: 1px solid var(--hairline);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 900px) {
  .intro { grid-template-columns: 1fr; }
  .intro-tech { border-radius: var(--r-lg); }
  .b2strip { grid-template-columns: 1fr; }
}

/* Poster with an explicit play affordance — a bare clickable image is neither
   discoverable nor keyboard-reachable. */
.poster {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  background: var(--ground-sunk);
  cursor: pointer;
  line-height: 0;
}
.poster img { border-bottom: 0; }
.poster-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #fff;
  background: linear-gradient(to top, rgba(4, 8, 14, 0.62), rgba(4, 8, 14, 0.12));
  font: 600 12.5px/1 var(--sans);
  letter-spacing: 0.01em;
  opacity: 0.92;
  transition: opacity 0.15s ease, background 0.15s ease;
}
.poster-play em { font-style: normal; }
.poster:hover .poster-play,
.poster:focus-visible .poster-play {
  opacity: 1;
  background: linear-gradient(to top, rgba(4, 8, 14, 0.72), rgba(76, 141, 255, 0.22));
}

/* The graph needs width, but it must scroll inside its own box rather than
   pushing the page sideways on a phone. */
@media (max-width: 700px) {
  #graph { min-width: 560px; }
  #graph-wrap { -webkit-overflow-scrolling: touch; }
  html, body { overflow-x: hidden; }
}