/* svg-zoom.css — click-to-enlarge viewer for concept diagrams.
   Any image marked data-svg-zoom is wired by assets/svg-zoom.js: it becomes a
   focusable button with a small ENLARGE badge, and opening it shows the SVG in
   a larger floating panel over the page. Esc, the close button or a click
   outside the panel closes it and focus returns to the diagram. An image inside
   a <picture> is wrapped together with its <picture> so responsive sources are
   left alone.

   Colour law of this site: black, red, gold. The viewer is red-accented and
   falls back to the brand red if a page does not define --electric-red. */

.svg-zoom-trigger {
  position: relative;
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 14px;
  background: none;
  font: inherit;
  color: inherit;
  text-align: inherit;
  cursor: zoom-in;
  -webkit-appearance: none;
  appearance: none;
}
.svg-zoom-trigger img { display: block; max-width: 100%; height: auto; }
.svg-zoom-trigger picture { display: block; width: 100%; }
.svg-zoom-trigger:focus-visible {
  outline: 2px solid var(--electric-red, #cc0000);
  outline-offset: 3px;
}
.svg-zoom-trigger img { transition: filter 220ms ease; }
.svg-zoom-trigger:hover img,
.svg-zoom-trigger:focus-visible img { filter: brightness(1.08) saturate(1.06); }

/* the affordance: always visible, so the diagram reads as something to open */
.svg-zoom-trigger::after {
  content: "⤢ ENLARGE";
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 0.34rem 0.62rem;
  border: 1px solid color-mix(in srgb, var(--electric-red, #cc0000) 55%, #000000);
  border-radius: 999px;
  background: rgba(14, 10, 10, 0.82);
  color: #e9dcdc;
  font: 700 0.62rem/1 var(--mono, ui-monospace, monospace);
  letter-spacing: 0.14em;
  opacity: 0.85;
  transition: opacity 200ms ease, border-color 200ms ease, color 200ms ease;
  pointer-events: none;
}
.svg-zoom-trigger:hover::after,
.svg-zoom-trigger:focus-visible::after {
  opacity: 1;
  border-color: var(--electric-red, #cc0000);
  color: #ffffff;
}

/* ---------- the floating panel ---------- */
.svg-zoom {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 4rem 1rem 1rem;
  background: rgba(4, 6, 8, 0.92);
  opacity: 0;
  visibility: hidden;
  transition: opacity 260ms ease, visibility 0s linear 260ms;
}
.svg-zoom[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  transition: opacity 260ms ease, visibility 0s;
}
.svg-zoom-content {
  display: grid;
  place-items: center;
  width: 100%;
  max-width: 96vw;
  max-height: 88vh;
  overflow: auto;
  overscroll-behavior: contain;
}
.svg-zoom-content img {
  display: block;
  height: auto;
  max-width: none;
  border: 1px solid #4a1d1d;
  border-radius: 16px;
  background: #121011;
  box-shadow: 0 24px 90px rgba(0, 0, 0, 0.72), 0 0 34px rgba(204, 0, 0, 0.18);
  transform: translateY(32px) scale(0.92);
  transition: transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.svg-zoom[aria-hidden="false"] .svg-zoom-content img { transform: translateY(0) scale(1); }
.svg-zoom-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid #596166;
  border-radius: 7px;
  background: #17191c;
  color: #f0ecec;
  font: 700 0.72rem/1 var(--mono, ui-monospace, monospace);
  cursor: pointer;
}
.svg-zoom-close:hover { border-color: var(--electric-red, #cc0000); color: #ffffff; }
.svg-zoom-hint {
  position: absolute;
  top: 1.3rem;
  left: 1rem;
  max-width: calc(100% - 12rem);
  color: #c4c4c8;
  font: 0.68rem/1.4 var(--mono, ui-monospace, monospace);
  letter-spacing: 0.08em;
}
body.svg-zoom-open { overflow: hidden; }

@media (max-width: 640px) {
  .svg-zoom { padding: 3.6rem 0.5rem 0.5rem; }
  .svg-zoom-content { max-width: 100vw; max-height: 84vh; }
  .svg-zoom-hint { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .svg-zoom,
  .svg-zoom[aria-hidden="false"] { transition: none; }
  .svg-zoom-content img,
  .svg-zoom[aria-hidden="false"] .svg-zoom-content img { transform: none; transition: none; }
  .svg-zoom-trigger img { transition: none; }
  /* the enlarge viewer ships with the cards it decorates; under reduced
     motion the whole document stops — no transition or animation survives
     on any page that loads this file (site-wide kill switch) */
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}