/* X1, the exhibit signature (W-183; brand B-25, B-28; C:/dev/Strature_Brand/SIGNATURE_STANDARD.md s1). Every plate's
   foot ends in .p-sig: the exhibit line (IBM Plex Mono 500, graphite, caps) right-aligned 12px left of the navy chip, the
   chip's right edge on the plate's right margin, below the source line. build.py signature() inlines both brand chips
   (sitebuild/brand/: X1 v2, 3.296:1, and the compact X1c, 3.870:1), never recoloured; exactly one is drawn:
     X1   while X1 at --x1-w is at least 150px (the standard's screen floor; the address on it stays legible);
     X1c  otherwise (half-width, grid and card plates, phones), at --x1-w but never below 86px (the standard's print
          floors, 0.8 in for X1c against 1.4 in for X1, applied to the 150px floor); its address moves into the
          exhibit line (.p-sig-url: "EXHIBIT E2 · UNITED STATES · " and the host).
   The switch is arithmetic, not a breakpoint: each chip's max-width is 0 unless its own condition holds, so the one
   value below decides both the size and which chip is drawn.

   THE ONE PARAMETER: --x1-w, the chip's width as a share of the plate (.plate is an inline-size container, so 1cqw is
   1% of it). The owner may change it (e.g. 12cqw); that is this one line. */
:root{--x1-w:20cqw;--x1-min:150px;--x1c-min:86px}
.plate .p-sig{--x1-on:max(0px,calc((var(--x1-w) - var(--x1-min) + .5px) * 9999));--x1c-on:max(0px,calc((var(--x1-min) - .5px - var(--x1-w)) * 9999));
  display:flex;justify-content:flex-end;align-items:center;margin-top:8px}
.plate .p-sig .x1{display:block;flex:none;height:auto;overflow:hidden}
.plate .p-sig .x1-full{width:var(--x1-w);max-width:min(100%,var(--x1-on));aspect-ratio:377.12 / 114.4}
.plate .p-sig .x1-compact{width:max(var(--x1-w),var(--x1c-min));max-width:min(100%,var(--x1c-on));aspect-ratio:307.51 / 79.46}
.plate .p-sig-id{min-width:0;padding-right:12px;font-family:var(--mono);font-weight:500;font-size:11px;line-height:1.35;letter-spacing:.06em;text-transform:uppercase;color:var(--graphite);text-align:right;overflow-wrap:anywhere}
.plate .p-sig-url{display:inline-block;vertical-align:bottom;white-space:pre;overflow:hidden;max-width:var(--x1c-on)}
/* on a navy plate graphite is 2.4:1, so the exhibit line takes the plate's own graphite-on-navy (as .p-foot does) */
.plate.navy .p-sig-id{color:rgba(251,249,245,.8)}
/* a card thumbnail prints no source line (cards.css), only the signature at its foot */
.icard-thumb .plate.mini .p-foot{display:block;padding-top:0}
.icard-thumb .plate.mini .p-foot > span{display:none}
.icard-thumb .plate.mini .p-sig{margin-top:10px}