/* MasterEngine Launch Stack — Concept A "The Kit, Laid Out".
   Flagship ink register; mono for the evidence (prices, dates, stamps). */
:root {
  --ink: #0B0E17;
  --panel: #101527;
  --panel-2: #131B33;
  --line: #26304D;
  --ice: #E6EBF5;
  --body: #CBD5E1;
  --muted: #9AA7C2;
  --indigo: #6366F1;
  --indigo-deep: #4F46E5;
  --indigo-soft: #A5B4FC;
  --held: #818CF8;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--body);
  font-family: "Avenir Next", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip {
  position: absolute; left: -9999px; top: 0; background: var(--indigo-deep);
  color: #fff; padding: 0.5rem 1rem; z-index: 10;
}
.skip:focus { left: 0; }
a { color: var(--indigo-soft); }
a:hover { color: var(--ice); }
:focus-visible { outline: 2px solid var(--indigo-soft); outline-offset: 2px; }
code { font-family: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace; font-size: 0.9em; }

/* ---------- header ---------- */
.site-header {
  display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center;
  justify-content: space-between;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
}
.lockup { display: flex; align-items: center; gap: 0.8rem; text-decoration: none; color: var(--ice); }
.lockup-mark svg { width: 38px; height: 38px; display: block; }
.lockup-text { font-size: 1.05rem; letter-spacing: 0.01em; line-height: 1.25; }
.lockup-text strong { font-weight: 700; }
.lockup-scope { display: block; font-size: 0.78rem; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; }
.site-nav a { color: var(--body); text-decoration: none; font-size: 0.95rem; }
.site-nav a:hover { color: var(--ice); }
.site-nav a[aria-current="page"] { color: var(--indigo-soft); border-bottom: 2px solid var(--indigo); }

main { max-width: 68rem; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem) 3rem; }
h1, h2, h3 { color: var(--ice); line-height: 1.2; font-weight: 650; }
h1 { font-size: clamp(1.9rem, 4.5vw, 2.9rem); letter-spacing: -0.015em; margin: 0.4em 0 0.5em; }
h2 { font-size: 1.45rem; margin-top: 2.2em; }
h3 { font-size: 1.15rem; }
.eyebrow {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--indigo-soft); margin: 2.2rem 0 0;
}
.standfirst { font-size: 1.13rem; max-width: 46rem; }
.standfirst strong, .standfirst em { color: var(--ice); }

/* ---------- strata figure ---------- */
.strata { list-style: none; margin: 2rem 0 0.6rem; padding: 0; }
.stratum {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem 0.9rem;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  padding: 0.85rem 1.1rem; margin-top: 0.45rem;
}
.stratum-num {
  font-family: ui-monospace, Consolas, monospace; font-size: 0.8rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); min-width: 9.5rem;
}
.stratum-name { color: var(--ice); font-weight: 600; }
.stratum-name a { color: var(--ice); }
.stratum-held { border-left: 4px solid var(--indigo); }
.stratum-empty { background: none; border: 1px dashed var(--line); }
.stratum-empty .stratum-name { color: var(--muted); font-weight: 400; }
.stratum-empty .stratum-name a { color: var(--muted); }
.stratum-note { color: var(--muted); font-size: 0.9rem; }
@media (min-width: 46rem) {
  .stratum:nth-child(1) { margin-right: 4.5rem; }
  .stratum:nth-child(2) { margin-left: 1.2rem; margin-right: 3.3rem; }
  .stratum:nth-child(3) { margin-left: 2.4rem; margin-right: 2.1rem; }
  .stratum:nth-child(4) { margin-left: 3.6rem; margin-right: 0.9rem; }
  .stratum:nth-child(5) { margin-left: 4.8rem; }
}
.strata-caption { color: var(--muted); max-width: 44rem; }

/* ---------- stamps & commercial ---------- */
.stamp {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.22rem 0.55rem; border-radius: 2px; white-space: nowrap;
}
.stamp-run { background: var(--indigo-deep); color: #FFFFFF; }
.stamp-eval { background: transparent; color: var(--indigo-soft); border: 1px dashed var(--indigo-soft); }
.commercial { font-size: 0.82rem; color: var(--muted); }

/* ---------- picker ---------- */
.picker { border: 1px solid var(--line); background: var(--panel); padding: 1.4rem clamp(1rem, 3vw, 2rem); margin-top: 2.6rem; }
.picker fieldset { border: 1px solid var(--line); margin: 1rem 0; padding: 0.9rem 1.1rem 1.1rem; }
.picker legend { color: var(--ice); font-weight: 600; padding: 0 0.4rem; }
.picker label { display: block; padding: 0.3rem 0; cursor: pointer; }
.picker input[type="radio"] { accent-color: var(--indigo); margin-right: 0.5rem; }
.picker button {
  background: var(--indigo-deep); color: #fff; border: 0; border-radius: 3px;
  font: inherit; font-weight: 650; padding: 0.65rem 1.4rem; cursor: pointer;
}
.picker button:hover { background: var(--indigo); }
.picker-result { margin-top: 1.4rem; }
.picker-result h3 { margin-bottom: 0.4rem; }
.picker-stack { list-style: none; margin: 0.8rem 0 0; padding: 0; }
.picker-stack li {
  border: 1px solid var(--line); background: var(--panel-2);
  padding: 0.8rem 1rem; margin-top: 0.45rem;
  display: flex; flex-wrap: wrap; gap: 0.3rem 0.9rem; align-items: baseline;
}
.picker-stack .pk-layer { font-family: ui-monospace, Consolas, monospace; font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); min-width: 9.5rem; }
.picker-stack .pk-name { color: var(--ice); font-weight: 650; }
.picker-stack .pk-note { flex-basis: 100%; color: var(--body); }

/* ---------- shelves ---------- */
.shelf-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); gap: 1rem; }
.shelf { border: 1px solid var(--line); background: var(--panel); padding: 1.1rem 1.2rem; }
.shelf h3 { margin-top: 0; }
.shelf h3 a { color: var(--ice); text-decoration: none; }
.shelf h3 a:hover { color: var(--indigo-soft); }

/* ---------- zero band & guide ---------- */
.zero-band { border: 1px solid var(--indigo); background: var(--panel); padding: 1.2rem clamp(1rem, 3vw, 2rem); margin-top: 2.6rem; }
.zero-framing {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  color: var(--ice); font-size: 1.02rem; border-left: 4px solid var(--indigo);
  padding-left: 1rem; max-width: 46rem;
}
.zero-list { list-style: none; padding: 0; }
.zero-list li { border: 1px solid var(--line); background: var(--panel); padding: 1.1rem 1.3rem; margin-top: 1rem; }
.zero-list h2 { margin-top: 0.2em; }

/* ---------- pick records ---------- */
.pick { border: 1px solid var(--line); background: var(--panel); padding: 1.4rem clamp(1rem, 3vw, 2rem); margin-top: 1.6rem; }
.pick-primary { border-left: 4px solid var(--indigo); }
.pick-role {
  font-family: ui-monospace, Consolas, monospace; font-size: 0.78rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin: 0;
}
.pick h2 { margin: 0.25em 0 0.3em; }
.pick-line { color: var(--ice); font-size: 1.05rem; margin: 0.2rem 0 0.7rem; max-width: 44rem; }
.pick-stamps { display: flex; flex-wrap: wrap; gap: 0.4rem 0.9rem; align-items: center; }
.pick-link { font-weight: 600; }
.verdict, .pick p { max-width: 46rem; }
.eval-note { border: 1px dashed var(--line); padding: 0.8rem 1rem; max-width: 46rem; }
.pick-facts { margin: 1.1rem 0 0.2rem; }
.pick-facts > div { display: grid; grid-template-columns: 7.5rem 1fr; gap: 0.4rem 1rem; padding: 0.5rem 0; border-top: 1px solid var(--line); }
.pick-facts dt {
  font-family: ui-monospace, Consolas, monospace; font-size: 0.8rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 0;
}
.pick-facts dd { margin: 0; max-width: 42rem; }
.checked { font-family: ui-monospace, Consolas, monospace; font-size: 0.83rem; color: var(--indigo-soft); }
.pick-gap { border-style: dashed; }

/* ---------- method ---------- */
.method-block { max-width: 46rem; }
.method-block .stamp { vertical-align: 0.1em; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); margin-top: 3rem;
  padding: 1.6rem clamp(1rem, 4vw, 3rem) 2.2rem;
  color: var(--muted); font-size: 0.93rem;
}
.site-footer p { max-width: 52rem; }
.footer-line { font-size: 0.88rem; }
@media (max-width: 30rem) {
  .stamp { white-space: normal; }
  .stratum-num, .picker-stack .pk-layer { min-width: 0; }
}