/* /standards: the four layers, the five standards, the three sponsors behind
   the base. Page-only figures; switchers and timeline are kit.css. */

/* ── the stack: choose a layer, see what it stands on ── */
.lstack { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px 44px; align-items: center; margin-top: 48px; }
.lstack__layers { display: flex; flex-direction: column; gap: 10px; margin: 0; padding: 0; perspective: 900px; }
.lstack__layers button {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: var(--card);
  color: var(--muted);
  font: 400 13.5px/1.4 var(--font-ui);
  text-align: left;
  cursor: pointer;
  transform: rotateX(14deg);
  transform-origin: 50% 100%;
  transition: border-color 260ms ease, background-color 260ms ease, box-shadow 260ms ease, transform 420ms var(--ease-out);
}
.lstack__layers button b { font: 500 13px var(--font-mono); letter-spacing: 0.1em; color: var(--label); }
.lstack__layers button span { font: 500 20px/1.2 var(--font-display); color: rgba(236, 239, 244, 0.86); }
.lstack__layers button.is-active { border-color: #5cc8ff; background: radial-gradient(ellipse 80% 140% at 0% 50%, rgba(92, 200, 255, 0.16), transparent 70%), var(--card); box-shadow: 0 0 60px -18px rgba(92, 200, 255, 0.7); transform: rotateX(0) translateX(10px); }
.lstack__layers button.is-active b { color: #9fd8ff; }
.lstack__layers button.is-active span { color: #fff; }
.lstack__layers button.is-under { border-color: rgba(110, 231, 183, 0.4); }
.lstack__layers button.is-under b { color: var(--live); }
.lstack__panel { padding: 26px 28px; border: 1px solid var(--edge); border-radius: 14px; background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(30, 120, 220, 0.12), transparent 70%), #070b12; }
.lstack__panel small { font: 500 10px var(--font-mono); letter-spacing: 0.16em; text-transform: uppercase; color: #9fd8ff; }
.lstack__panel h3 { margin: 10px 0 0; font: 500 26px/1.15 var(--font-display); color: var(--fg); }
.lstack__panel p { margin: 12px 0 0; font-size: 15px; line-height: 1.6; color: var(--muted); }
.lstack__panel em { display: block; margin-top: 16px; font: 500 11px var(--font-mono); font-style: normal; letter-spacing: 0.04em; color: rgba(236, 239, 244, 0.8); }
.lstack__panel .lstack__rests { margin-top: 18px; padding-top: 14px; border-top: 1px solid rgba(255, 255, 255, 0.07); font: 500 10px var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--live); }

/* ── the five standards, each with what it actually looks like ── */
.stds { margin-top: 48px; }
.stds .kit-tabs > [data-switch-tab] b { font-family: var(--font-display); font-size: 17px; font-weight: 500; }
.sx { padding: 22px 24px; border: 1px solid var(--edge); border-radius: 14px; background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(30, 120, 220, 0.12), transparent 70%), #070b12; }
.sx__kind { margin: 0; font: 500 10px var(--font-mono); letter-spacing: 0.16em; text-transform: uppercase; color: #9fd8ff; }
.sx__what { margin: 10px 0 18px; max-width: 62ch; font-size: 15px; line-height: 1.6; color: var(--muted); }
.sx__code { margin: 0; padding: 16px 18px; overflow-x: auto; border: 1px solid var(--line-soft); border-radius: 10px; background: #05080d; font: 500 12.5px/1.7 var(--font-mono); color: #c9d3df; white-space: pre; }
.sx__code .k { color: #9fd8ff; }
.sx__code .s { color: var(--live); }
.sx__code .c { color: var(--faint); }
.sx__chain { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.sx__chain span { padding: 10px 12px; border: 1px solid rgba(92, 200, 255, 0.35); border-radius: 10px; background: rgba(92, 200, 255, 0.07); font: 500 12.5px var(--font-mono); color: #e6f6ff; }
.sx__chain span small { display: block; margin-bottom: 4px; font: 500 8.5px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--label); }
.sx__chain i { width: 26px; height: 1px; background: rgba(92, 200, 255, 0.7); box-shadow: 0 0 8px rgba(92, 200, 255, 0.6); }
.sx__chain span.is-to { border-color: rgba(110, 231, 183, 0.45); background: rgba(110, 231, 183, 0.07); }
.sx__toc { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 18px; margin: 0; padding: 0; list-style: none; counter-reset: m11; }
.sx__toc li { display: flex; gap: 10px; padding: 9px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.06); font-size: 13.5px; color: rgba(236, 239, 244, 0.9); }
.sx__toc li b { flex: none; width: 22px; font: 500 11px var(--font-mono); color: #9fd8ff; }
.sx__more { margin: 18px 0 0; font-size: 13.5px; }
.sx__more a { color: var(--fg); border-bottom: 1px solid rgba(239, 238, 233, 0.3); }
.sx__more a:hover { border-bottom-color: #fff; }

/* ── the authors: three sponsors converge on the base ── */
.authors { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; gap: 0 36px; margin-top: 48px; }
.authors__from { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.authors__from li { padding: 16px 18px; border: 1px solid var(--line-soft); border-radius: 12px; background: var(--card); }
.authors__from b { display: block; font: 500 20px var(--font-display); color: var(--fg); }
.authors__from span { display: block; margin-top: 4px; font-size: 13px; color: var(--muted); }
.authors__from small { display: block; margin-top: 8px; font: 500 9.5px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: #9fd8ff; }
.authors__core { display: grid; place-items: center; width: 190px; height: 190px; border: 1px solid rgba(92, 200, 255, 0.5); border-radius: 50%; background: radial-gradient(circle, rgba(92, 200, 255, 0.18), #08111c 70%); box-shadow: 0 0 80px -12px rgba(92, 200, 255, 0.6); text-align: center; }
.authors__core b { display: block; font: 500 20px/1.15 var(--font-display); color: #fff; }
.authors__core small { display: block; margin-top: 6px; font: 500 9px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: #9fd8ff; }
.authors__to { padding: 22px 24px; border: 1px solid rgba(110, 231, 183, 0.4); border-radius: 14px; background: radial-gradient(ellipse 80% 100% at 0% 50%, rgba(110, 231, 183, 0.09), transparent 70%), var(--card); }
.authors__to small { font: 500 10px var(--font-mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--live); }
.authors__to b { display: block; margin-top: 8px; font: 500 22px/1.2 var(--font-display); color: var(--fg); }
.authors__to p { margin: 10px 0 0; font-size: 14px; line-height: 1.6; color: var(--muted); }
.authors::before, .authors::after { content: ""; position: absolute; top: 50%; height: 1px; background: linear-gradient(90deg, rgba(92, 200, 255, 0.15), rgba(92, 200, 255, 0.7)); }
.authors::before { left: calc(33% - 10px); width: 60px; }
.authors::after { right: calc(33% - 10px); width: 60px; background: linear-gradient(90deg, rgba(92, 200, 255, 0.7), rgba(110, 231, 183, 0.6)); }

@media (max-width: 980px) {
  .lstack, .authors { grid-template-columns: 1fr; gap: 20px; }
  .authors::before, .authors::after { display: none; }
  .authors__core { width: 100%; height: auto; padding: 22px; border-radius: 14px; }
  .lstack__layers button { transform: none; }
  .lstack__layers button.is-active { transform: translateX(6px); }
}
@media (max-width: 640px) {
  .sx__toc { grid-template-columns: 1fr; }
  .sx__chain i { width: 1px; height: 16px; }
  .sx__chain { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  .lstack__layers button { transform: none; transition: border-color 200ms ease, background-color 200ms ease; }
}

/* ══ The page's own world: the stratum column. Full-width bands, deeper and darker toward the source, each in its own
   hatching; a core line with a light that rises; square edges. ══ */
.page-strata { --bp: rgba(92, 200, 255, 0.045); --strata-line: rgba(159, 216, 255, 0.22); }

/* the hero: the title across the top, the strata across the frame */
.strata-hero { padding: 136px 0 80px; }
.strata-hero__top { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 24px 64px; align-items: end; }
.strata-hero .page-title { max-width: 17ch; font-size: clamp(42px, 5vw, 76px); }
.strata-hero .page-lede { margin-top: 0; }
.strata { position: relative; margin: 52px 0 0; animation: heroUp 0.9s var(--ease-out) 0.2s both; }
.strata__band { position: relative; display: grid; grid-template-columns: 150px minmax(0, 1fr) 170px; align-items: center; gap: 24px; min-height: 92px; padding: 14px 24px 14px 64px; border-top: 1px solid var(--strata-line); }
.strata__band:last-of-type { border-bottom: 1px solid var(--strata-line); }
.strata__band--l4 { background: linear-gradient(90deg, rgba(110, 231, 183, 0.12), rgba(110, 231, 183, 0.03)); }
.strata__band--l3 { background: repeating-linear-gradient(0deg, rgba(92, 200, 255, 0.1) 0 1px, transparent 1px 8px), rgba(20, 60, 100, 0.22); }
.strata__band--l2 { background: repeating-linear-gradient(135deg, rgba(92, 200, 255, 0.13) 0 1px, transparent 1px 10px), rgba(12, 40, 72, 0.34); }
.strata__band--l1 { background: radial-gradient(rgba(159, 216, 255, 0.2) 1px, transparent 1.4px) 0 0 / 10px 10px, rgba(5, 16, 30, 0.7); }
.strata__depth { display: grid; gap: 2px; font: 500 10px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: rgba(159, 216, 255, 0.78); }
.strata__depth b { font: 500 30px/1 var(--font-display); letter-spacing: 0; color: #fff; }
.strata__fact { margin: 0; font-size: 16px; line-height: 1.5; color: #fff; text-wrap: pretty; }
.strata__fact code { padding: 1px 6px; border: 1px solid rgba(182, 246, 255, 0.35); border-radius: 3px; font: 500 14px var(--font-mono); color: #b6f6ff; }
.strata__band--l1 .strata__fact { font: italic 400 20px/1.4 var(--font-display); }
.strata__band--l1 .strata__fact b { font-weight: 600; font-style: normal; }
.strata__std { justify-self: end; font: 500 10.5px/1.4 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; text-align: right; color: var(--label); }
.strata__band--l4 .strata__std { color: var(--live); }
.strata__core { position: absolute; z-index: 1; left: 30px; top: 46px; bottom: 76px; width: 1px; background: linear-gradient(0deg, rgba(92, 200, 255, 0.75), rgba(110, 231, 183, 0.75)); }
.strata__core i { position: absolute; inset: 0; transform: none; }
.strata__core i::before { content: ""; position: absolute; left: -5px; bottom: -6px; width: 11px; height: 11px; border-radius: 50%; background: #b6f6ff; box-shadow: 0 0 14px #5cc8ff; }
.strata .strata__core i[data-at] { transform: translateY(-100%); transition: transform 2.6s cubic-bezier(0.65, 0, 0.35, 1), opacity 0.3s ease; }
.strata.is-armed .strata__core i[data-at]:not(.is-on) { opacity: 1; transform: translateY(0); }
.strata figcaption { margin-top: 12px; font: 500 10px var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--label); }

/* sections open on three strata lines */
.page-strata .section-head { max-width: none; padding-top: 30px; background: linear-gradient(var(--strata-line), var(--strata-line)) 0 0 / 100% 1px no-repeat, linear-gradient(rgba(159, 216, 255, 0.14), rgba(159, 216, 255, 0.14)) 0 5px / 100% 1px no-repeat, linear-gradient(rgba(159, 216, 255, 0.08), rgba(159, 216, 255, 0.08)) 0 10px / 100% 1px no-repeat; }
.page-strata .section-head > * { max-width: 760px; }
.page-strata .lstack__layers button, .page-strata .lstack__panel, .page-strata .sx, .page-strata .kit-tabs { border-radius: 0; }

@media (max-width: 980px) {
  .strata-hero__top { grid-template-columns: 1fr; }
  .strata__band { grid-template-columns: 110px minmax(0, 1fr); }
  .strata__std { display: none; }
}
@media (max-width: 640px) {
  .strata-hero { padding-top: 112px; }
  .strata__band { grid-template-columns: 1fr; gap: 6px; padding: 16px 16px 16px 48px; }
  .strata__depth { grid-auto-flow: column; justify-content: start; align-items: baseline; gap: 10px; }
  .strata__depth b { font-size: 22px; }
  .strata__core { left: 22px; }
  .strata__band--l1 .strata__fact { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) { .strata .strata__core i[data-at] { transition: opacity 0.2s ease; } }

/* support (generated) */
.lstack[data-switch-current="l4"] [data-switch-tab="l3"],
.lstack[data-switch-current="l4"] [data-switch-tab="l2"],
.lstack[data-switch-current="l4"] [data-switch-tab="l1"],
.lstack[data-switch-current="l3"] [data-switch-tab="l2"],
.lstack[data-switch-current="l3"] [data-switch-tab="l1"],
.lstack[data-switch-current="l2"] [data-switch-tab="l1"] { border-color: rgba(110, 231, 183, 0.45); }
.lstack[data-switch-current="l4"] [data-switch-tab="l3"] b,
.lstack[data-switch-current="l4"] [data-switch-tab="l2"] b,
.lstack[data-switch-current="l4"] [data-switch-tab="l1"] b,
.lstack[data-switch-current="l3"] [data-switch-tab="l2"] b,
.lstack[data-switch-current="l3"] [data-switch-tab="l1"] b,
.lstack[data-switch-current="l2"] [data-switch-tab="l1"] b { color: var(--live); }