/* Hose Code Stack — Capillary Mat policy
   Stacked hose couplings → code desk. NOT spindle rings / blotter / charter.
   WCAG AA: body ink on paper/mist; live couplings use on-* colors. */

.page-a105-hosecode {
  background:
    linear-gradient(180deg, rgba(214, 244, 238, 0.55) 0%, transparent 28%),
    var(--a105-mist);
}

.page-a105-hosecode .hk-stage {
  padding-bottom: 72px;
}

.hk-head {
  padding: 36px 0 22px;
}
.hk-kicker {
  margin: 0 0 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--a105-mat-deep);
}
.hk-head .a105-display {
  margin: 0 0 10px;
  font-size: clamp(2rem, 4.5vw, 3rem);
  color: var(--a105-ink);
}
.hk-lede {
  margin: 0 0 10px;
  max-width: 58ch;
  color: var(--a105-mute);
  line-height: 1.6;
}
.hk-lede strong { color: var(--a105-ink); }
.hk-revised {
  margin: 0;
  font-size: 0.88rem;
  color: var(--a105-mute);
}
.hk-revised em {
  font-style: normal;
  font-weight: 800;
  color: var(--a105-plug-deep);
}

/* —— Layout: coupling stack + desk —— */
.hk-layout {
  display: grid;
  grid-template-columns: minmax(200px, 240px) minmax(0, 1fr);
  gap: 1.5rem 1.75rem;
  align-items: start;
}

.hk-stack {
  position: relative;
  z-index: 20;
  padding: 0.9rem 0.75rem 1rem;
  border-radius: 8px;
  background: var(--a105-surface);
  border: 2px solid rgba(14, 124, 116, 0.22);
  box-shadow: 6px 6px 0 rgba(43, 33, 24, 0.1);
}
.hk-stack-label {
  margin: 0 0 0.65rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--a105-mute);
}

.hk-couplings {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.25rem 0.15rem;
}

.hk-hose-line {
  position: absolute;
  left: 50%;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 5px;
  margin-left: -2.5px;
  border-radius: 4px;
  background: linear-gradient(
    180deg,
    var(--a105-mat),
    var(--a105-sprout),
    var(--a105-sun),
    var(--a105-plug)
  );
  opacity: 0.28;
  pointer-events: none;
  z-index: 0;
}

/* Couplings = former .rk-ring — visible by default; animate as enhancement */
.rk-ring.hk-coupling {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 0 0.55rem;
  align-items: center;
  min-width: 0;
  padding: 0.7rem 0.75rem 0.7rem 0.55rem;
  border: 2.5px solid var(--a105-ink);
  border-radius: 999px 10px 10px 999px;
  background: var(--a105-surface);
  color: var(--a105-ink);
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, box-shadow 180ms ease;
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .rk-ring.hk-coupling {
    opacity: 0;
    transform: translateX(-10px);
    animation: hkCoupleIn 420ms ease forwards;
    animation-delay: calc(var(--hk-i, 0) * 55ms);
  }
}
@keyframes hkCoupleIn {
  to { opacity: 1; transform: none; }
}

.hk-collar {
  grid-column: 1;
  grid-row: 1 / -1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 22px;
  height: 36px;
  padding: 4px 3px;
  border-radius: 999px;
  background: rgba(18, 35, 30, 0.08);
  border: 2px solid rgba(18, 35, 30, 0.2);
}
.hk-thread {
  display: block;
  height: 3px;
  border-radius: 2px;
  background: rgba(18, 35, 30, 0.28);
}

.rk-ring.hk-coupling em {
  grid-column: 2;
  grid-row: 1;
  font-style: normal;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--a105-mute);
}
.rk-ring.hk-coupling strong {
  grid-column: 2;
  grid-row: 2;
  font-size: 0.88rem;
  font-weight: 800;
  line-height: 1.2;
}

.rk-ring.hk-coupling:hover {
  transform: translateX(4px);
}

.rk-ring.hk-coupling--mat.is-live {
  background: var(--a105-mat);
  color: var(--a105-on-mat);
  box-shadow: 4px 0 0 var(--a105-loam);
}
.rk-ring.hk-coupling--plug.is-live {
  background: var(--a105-plug);
  color: var(--a105-on-plug);
  box-shadow: 4px 0 0 var(--a105-loam);
}
.rk-ring.hk-coupling--sun.is-live {
  background: var(--a105-sun);
  color: var(--a105-on-sun);
  box-shadow: 4px 0 0 var(--a105-loam);
}
.rk-ring.hk-coupling--sprout.is-live {
  background: var(--a105-sprout);
  color: var(--a105-on-sprout);
  box-shadow: 4px 0 0 var(--a105-loam);
}

.rk-ring.hk-coupling.is-live em {
  color: inherit;
  opacity: 0.85;
}
.rk-ring.hk-coupling.is-live .hk-collar {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.45);
}
.rk-ring.hk-coupling.is-live .hk-thread {
  background: rgba(255, 255, 255, 0.7);
}
.rk-ring.hk-coupling--sun.is-live .hk-collar {
  background: rgba(42, 28, 0, 0.12);
  border-color: rgba(42, 28, 0, 0.35);
}
.rk-ring.hk-coupling--sun.is-live .hk-thread {
  background: rgba(42, 28, 0, 0.45);
}
.rk-ring.hk-coupling--sprout.is-live .hk-collar {
  background: rgba(26, 46, 10, 0.12);
  border-color: rgba(26, 46, 10, 0.35);
}
.rk-ring.hk-coupling--sprout.is-live .hk-thread {
  background: rgba(26, 46, 10, 0.45);
}

.rk-ring.hk-coupling.is-live.is-click {
  animation: hkCoupleClick 0.35s ease;
}
@keyframes hkCoupleClick {
  0% { transform: scale(1); }
  40% { transform: scale(1.03) translateX(2px); }
  100% { transform: scale(1); }
}

/* —— Code desk — always visible; optional entrance when JS adds .is-in —— */
.hk-desk {
  position: relative;
  padding: 28px 26px 32px;
  border: 2.5px solid var(--a105-ink);
  border-radius: 6px 22px 6px 22px;
  background: var(--a105-paper);
  color: var(--a105-ink);
  box-shadow: 8px 8px 0 rgba(43, 33, 24, 0.12);
  opacity: 1;
  transform: none;
  margin-bottom: 24px;
  min-width: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .hk-desk.is-in {
    animation: hk-desk-in 0.42s ease both;
  }
}

@keyframes hk-desk-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}
.hk-desk-rib {
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 7px;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(
    180deg,
    var(--a105-mat),
    var(--a105-plug),
    var(--a105-sun),
    var(--a105-sprout)
  );
}
.hk-desk-mark {
  margin: 0 0 18px;
  padding-left: 12px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--a105-mat-deep);
}

.hk-body {
  padding-left: 12px;
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--a105-ink);
}
.hk-body h2 {
  margin: 1.6em 0 0.55em;
  font-family: var(--a105-font-display);
  font-size: 1.35rem;
  color: var(--a105-ink);
  line-height: 1.2;
}
.hk-body h2:first-of-type { margin-top: 0; }
.hk-body p { margin: 0 0 0.9em; color: var(--a105-ink); }
.hk-body ul {
  margin: 0 0 1em;
  padding-left: 1.2em;
  color: var(--a105-ink);
}
.hk-body li { margin-bottom: 0.45em; }
.hk-body a {
  color: var(--a105-mat-deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.hk-body strong { color: var(--a105-ink); }

.rk-ring.hk-coupling:focus-visible {
  outline: 3px solid var(--a105-sun);
  outline-offset: 3px;
}

@media (max-width: 800px) {
  .hk-layout {
    grid-template-columns: 1fr;
  }
  .hk-stack {
    position: static;
  }
  .hk-couplings {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
  }
  .hk-hose-line {
    display: none;
  }
  .rk-ring.hk-coupling {
    border-radius: 10px;
  }
}

@media (max-width: 480px) {
  .hk-couplings {
    grid-template-columns: 1fr;
  }
  .hk-desk {
    padding: 22px 16px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rk-ring.hk-coupling,
  .hk-desk {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
  .rk-ring.hk-coupling.is-live.is-click {
    animation: none !important;
  }
}