@font-face {
  font-family: BK Sans;
  src: url("bk-sans.woff") format("woff");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: BK Sans;
  src: url("bk-sans-bold.woff") format("woff");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: BK Serif;
  src: url("bk-serif-italic.woff") format("woff");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}

:root {
  --bk-paper: #faf9f5;
  --bk-card: #fffefa;
  --bk-wash: #edf4ee;
  --bk-mint: #e7f2ec;
  --bk-sun: #fcf0dc;
  --bk-sky: #e8f2f5;
  --bk-ink: #17312b;
  --bk-muted: #485e56;
  --bk-line: #d5e1d8;
  --bk-accent: #f7dfa1;
  --bk-link: #265b50;
  --bk-inverse: #f6faf4;
  --bk-radius: 13px;
  --bk-gutter: clamp(18px, 4.65vw, 74px);
  --bk-section: clamp(64px, 8vw, 120px);
  --bk-font: "BK Sans", system-ui, -apple-system, sans-serif;
  --bk-display: clamp(2.45rem, 5.65vw, 5.7rem);
  --bk-title: clamp(2rem, 3.55vw, 3.85rem);
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 100px; }
body {
  margin: 0;
  background: var(--bk-paper);
  color: var(--bk-ink);
  font: 1rem/1.6 var(--bk-font);
  -webkit-font-smoothing: antialiased;
}
.wp-site-blocks { padding: 0; }
.bk-shell { width: min(1320px, calc(100% - var(--bk-gutter) - var(--bk-gutter))); margin-inline: auto; }
.bk-shell :where(h1, h2, h3, p, dl, ol, ul, figure), .bk-header :where(nav, p), .bk-footer :where(h2, p, nav) { margin: 0; }
.bk-shell :where(h1, h2, h3) {
  font-family: var(--bk-font);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -.055em;
}
.bk-shell h1 { font-size: var(--bk-display); overflow-wrap: anywhere; }
.bk-shell h2 { font-size: var(--bk-title); overflow-wrap: anywhere; }
.bk-shell h3 { font-size: clamp(1.22rem, 1.9vw, 1.65rem); overflow-wrap: anywhere; }
.bk-shell a, .bk-footer a, .bk-header a { color: inherit; }
.bk-shell img { display: block; max-width: 100%; height: auto; }
.bk-shell figure { min-width: 0; }
.bk-shell figcaption { color: var(--bk-muted); font-size: .77rem; line-height: 1.4; }
.bk-shell :where(button, input, select, textarea) { font: inherit; color: inherit; }
.bk-shell button, .bk-shell summary, .bk-menu summary { cursor: pointer; }
.bk-shell [hidden] { display: none !important; }
.bk-shell :focus-visible, .bk-header :focus-visible, .bk-footer :focus-visible, .bk-skip:focus-visible {
  outline: 3px solid #3e7664;
  outline-offset: 4px;
}
.bk-skip {
  position: fixed;
  z-index: 20;
  inset: 12px auto auto 12px;
  padding: 10px 16px;
  background: var(--bk-card);
  color: var(--bk-ink);
  transform: translateY(-160%);
}
.bk-skip:focus { transform: none; }

.bk-header {
  position: sticky;
  top: 0;
  z-index: 8;
  border-bottom: 1px solid var(--bk-line);
  background: var(--bk-paper);
}
.admin-bar .bk-header { top: var(--wp-admin--admin-bar--height, 32px); }
.bk-header-inner {
  position: relative;
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 2.5vw, 38px);
}
.bk-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  text-decoration: none;
  font-size: clamp(1.05rem, 1.65vw, 1.38rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.066em;
}
.bk-brand img { width: 38px; height: 38px; flex: none; }
.bk-brand--logo { min-height: 44px; }
.bk-header .bk-brand--logo { min-width: 0; }
.bk-brand .bk-logo { display: block; width: clamp(180px, 24vw, 300px); height: auto; }
.bk-footer .bk-logo { width: clamp(224px, 27vw, 320px); }
.bk-brand-lockup { display: grid; gap: 5px; }
.bk-wordmark > span, .bk-brand > span:not(.bk-brand-lockup) > span { color: var(--bk-link); }
.bk-brand-tagline {
  color: var(--bk-link);
  font-size: .5em;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.bk-nav, .bk-header-actions { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 36px); }
.bk-nav a, .bk-header-actions a {
  white-space: nowrap;
  text-decoration: none;
  font-size: .85rem;
  font-weight: 700;
}
.bk-nav a[aria-current="page"], .bk-nav a:hover, .bk-menu a:hover { text-decoration: underline; text-underline-offset: .35em; }
.bk-header .bk-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: .62rem .9rem;
  border: 1px solid var(--bk-line);
  border-radius: 5px;
}
.bk-arrow {
  display: inline-block;
  width: 14px;
  height: 14px;
  flex: none;
  background: currentColor;
  mask: url("arrow-up-right.svg") center / contain no-repeat;
}
.bk-header .bk-nav-cta:hover { background: var(--bk-wash); }
.bk-menu { display: none; flex-shrink: 0; }
.bk-menu summary {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  padding: .6rem .75rem;
  border: 1px solid var(--bk-line);
  border-radius: 4px;
  list-style: none;
  font-size: .85rem;
  font-weight: 700;
}
.bk-menu summary::-webkit-details-marker, .bk-faq summary::-webkit-details-marker { display: none; }
.bk-menu summary span { width: 14px; height: 8px; border-block: 1.5px solid; }
.bk-menu nav {
  position: absolute;
  inset: calc(100% + 1px) 0 auto;
  display: grid;
  padding: 8px 16px;
  border: 1px solid var(--bk-line);
  background: var(--bk-card);
  box-shadow: 0 14px 28px #17261e15;
}
.bk-menu:not([open]) nav { display: none; }
.bk-menu nav a { padding: 10px 0; font-weight: 700; text-decoration: none; }
.bk-menu nav a + a { border-top: 1px solid var(--bk-line); }

.bk-kicker {
  display: flex;
  align-items: center;
  gap: .65rem;
  color: var(--bk-link);
  font: 700 .72rem/1.4 var(--bk-font);
  letter-spacing: .11em;
  text-transform: uppercase;
}
.bk-kicker-line { flex: none; width: 19px; height: 2px; background: currentColor; }
.bk-lead { color: var(--bk-muted); font-size: clamp(1.03rem, 1.35vw, 1.24rem); line-height: 1.62; }
.bk-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1.45rem; }
.bk-shell .bk-btn {
  display: inline-flex;
  min-height: 51px;
  max-width: 100%;
  width: fit-content;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  padding: .75rem 1.1rem;
  border: 1px solid var(--bk-ink);
  border-radius: 9px;
  background: var(--bk-ink);
  color: var(--bk-inverse);
  text-decoration: none;
  font: 700 .91rem/1.3 var(--bk-font);
  transition: background-color 160ms ease, color 160ms ease;
}
.bk-shell .bk-btn:hover { background: #2b5146; border-color: #2b5146; }
.bk-shell .bk-btn:disabled { cursor: not-allowed; opacity: .6; }
.bk-shell .bk-btn-light { background: var(--bk-accent); color: var(--bk-ink); border-color: var(--bk-accent); }
.bk-shell .bk-btn-light:hover { background: #f9e9be; border-color: #f9e9be; }
.bk-shell .bk-text-link {
  display: inline-flex;
  width: fit-content;
  min-height: 38px;
  align-items: center;
  gap: .55rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--bk-link);
  font: 700 .91rem/1.3 var(--bk-font);
  text-align: left;
  text-decoration: underline;
  text-decoration-color: #778c70;
  text-underline-offset: .27em;
}
.bk-shell .bk-text-link:hover { text-decoration-thickness: 2px; }
.bk-status-dot { display: inline-block; width: 8px; height: 8px; flex: none; border-radius: 50%; background: #6c855e; }
.bk-section { margin-top: var(--bk-section); }
.bk-section-heading { max-width: 750px; }
.bk-section-heading h2 { margin-top: .52em; }
.bk-section-heading > p:not(.bk-kicker) { max-width: 56ch; margin-top: 1rem; color: var(--bk-muted); }

.bk-hero { padding-top: clamp(25px, 4vw, 57px); }
.bk-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.16fr);
  align-items: center;
  gap: clamp(24px, 5vw, 80px);
}
.bk-hero-copy { padding-block: 16px 20px; }
.bk-hero-copy h1 {
  margin: .24em 0 .28em;
  font-size: clamp(2.7rem, 5.8vw, 5.95rem);
  line-height: .99;
  letter-spacing: -.078em;
}
.bk-hero-copy h1 em {
  font-family: "BK Serif", Georgia, serif;
  color: var(--bk-link);
  font-weight: 400;
  letter-spacing: -.09em;
}
.bk-hero-copy .bk-lead { max-width: 42ch; }
.bk-use-line {
  display: flex;
  flex-wrap: wrap;
  gap: .2rem .65rem;
  margin-top: .9rem !important;
  color: var(--bk-link);
  font-size: .85rem;
}
.bk-hero-copy .bk-actions { margin-top: clamp(18px, 2.4vw, 34px); }
.bk-hero-copy .bk-hero-note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: clamp(18px, 2.4vw, 34px);
  color: var(--bk-muted);
  font-size: .78rem;
}
.bk-hero-visual { display: grid; min-width: 0; gap: 8px; }
.bk-visual-tabs {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--bk-line);
  border-radius: 8px;
  background: var(--bk-wash);
}
.bk-visual-tabs button {
  display: flex;
  min-height: 44px;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: .52rem;
  padding: .44rem .35rem;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  font-size: .84rem;
  font-weight: 700;
  line-height: 1.3;
}
.bk-visual-tabs button span { color: var(--bk-link); font-size: .73rem; font-variant-numeric: tabular-nums; }
.bk-visual-tabs button:hover { border-color: var(--bk-line); }
.bk-visual-tabs button[aria-selected="true"] {
  border-color: var(--bk-line);
  background: var(--bk-card);
  box-shadow: 0 1px 2px #17261e12;
}
.bk-hero-media { min-width: 0; overflow: hidden; border-radius: 7px; background: #26392c; }
.bk-hero-media picture { display: block; }
.bk-hero-media img { width: 100%; aspect-ratio: 4 / 3; max-height: 555px; object-fit: cover; object-position: center 54%; }
.bk-hero-media figcaption {
  display: flex;
  gap: 11px;
  align-items: center;
  padding: 12px 15px;
  color: var(--bk-inverse);
  background: #223128;
  font-weight: 700;
}
.bk-hero-media figcaption span:first-child { color: var(--bk-accent); font-variant-numeric: tabular-nums; }
.bk-hero-media .bk-media-label { margin-left: auto; color: #ccd6c3; font-weight: 400; }
.bk-power-flow {
  display: grid;
  align-content: center;
  min-height: clamp(390px, 35vw, 540px);
  min-width: 0;
  padding: clamp(17px, 2.45vw, 33px);
  border-radius: 7px;
  background: radial-gradient(ellipse at top right, #385748 0%, transparent 66%), #17332a;
  color: var(--bk-inverse);
}
.bk-flow-kicker {
  color: var(--bk-accent);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.bk-power-flow h2 { margin-top: .28em; font-size: clamp(1.88rem, 3.1vw, 3.2rem); }
.bk-flow-steps {
  --bk-flow-icon-size: clamp(34px, 3.25vw, 45px);
  display: grid;
  gap: .12rem;
  padding: 0;
  margin-top: .85rem !important;
  list-style: none;
}
.bk-flow-steps li {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(8px, 1.2vw, 16px);
  padding: .55rem 0;
  border-top: 1px solid #eaf1d22c;
}
.bk-flow-steps li:not(:last-child)::after {
  position: absolute;
  z-index: 1;
  bottom: -.34rem;
  left: calc(var(--bk-flow-icon-size) / 2 - 3px);
  width: 6px;
  height: 6px;
  border-right: 1px solid var(--bk-accent);
  border-bottom: 1px solid var(--bk-accent);
  background: #17332a;
  content: "";
  transform: rotate(45deg);
}
.bk-flow-icon {
  display: grid;
  width: var(--bk-flow-icon-size);
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid #e1eb9350;
  border-radius: 7px;
  background: #e1eb9314;
  color: var(--bk-accent);
}
.bk-flow-icon svg { width: 69%; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.bk-flow-steps h3 { color: var(--bk-inverse); font-size: .97rem; line-height: 1.25; letter-spacing: -.02em; }
.bk-flow-steps p { margin-top: .16rem; color: #dce6d7; font-size: .86rem; line-height: 1.42; }
.bk-flow-number { align-self: start; margin-top: .12rem; color: var(--bk-accent); font-size: .74rem; font-variant-numeric: tabular-nums; }
.bk-flow-note {
  margin-top: .55rem !important;
  padding: .64rem .7rem;
  border-left: 2px solid var(--bk-accent);
  background: #e1eb9314;
  color: #e7efe1;
  font-size: .83rem;
  line-height: 1.48;
}
.bk-flow-note strong { color: var(--bk-inverse); }
.bk-hero--scene { padding-top: clamp(18px, 2.7vw, 38px); }
.bk-hero--scene .bk-hero-grid {
  grid-template-columns: minmax(0, .65fr) minmax(0, 1.35fr);
  gap: clamp(22px, 3vw, 46px);
  padding: clamp(20px, 3vw, 42px);
  border: 1px solid var(--bk-line);
  border-radius: clamp(18px, 2.5vw, 34px);
  background: linear-gradient(126deg, #fcf0dd 0%, #fcfaf4 43%, #e6f1ec 100%);
}
.bk-hero--scene .bk-hero-copy h1 { font-size: clamp(2.55rem, 4.8vw, 4.8rem); }
.bk-hero--scene .bk-hero-copy .bk-lead { font-size: clamp(1rem, 1.25vw, 1.17rem); }
.bk-hero--scene .bk-hero-copy .bk-actions { gap: .55rem 1.25rem; }
.bk-hero--scene .bk-hero-copy .bk-hero-note { margin-top: 1.05rem; }
.bk-hero-copy .bk-hero-connection { margin-top: .7rem; color: var(--bk-link); font-size: .87rem; line-height: 1.5; }
.bk-hero-connection a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: .45rem;
  font-weight: 700;
  text-underline-offset: .2em;
}
.bk-energy {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--bk-line);
  border-radius: calc(var(--bk-radius) + 5px);
  background: var(--bk-card);
  box-shadow: 0 14px 42px #193f3416;
}
.bk-energy-scene { position: relative; isolation: isolate; background: #f9f2e6; }
.bk-energy-scene img { width: 100%; height: auto; }
.bk-scene-tag {
  position: absolute;
  z-index: 2;
  top: clamp(9px, 1.3vw, 18px);
  left: clamp(9px, 1.3vw, 18px);
  display: inline-flex;
  align-items: center;
  gap: .48rem;
  padding: .39rem .66rem;
  border: 1px solid #e9dfc8;
  border-radius: 999px;
  background: #fffefaef;
  color: var(--bk-ink);
  font-size: clamp(.67rem, .85vw, .81rem);
  font-weight: 700;
  line-height: 1.15;
}
.bk-scene-tag span { width: 7px; height: 7px; border-radius: 50%; background: #bb762e; }
.bk-energy-route, .bk-energy-controls { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.bk-energy-route path {
  stroke: #ffde85;
  stroke-width: 2.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 1.1px #664021) drop-shadow(0 0 3px #c27837);
}
.bk-energy-route path[data-active] { stroke: #fff2b1; stroke-width: 4; }
.bk-energy-route circle {
  fill: #fff0b5;
  stroke: #815f36;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}
.bk-energy-point {
  position: absolute;
  top: var(--bk-y);
  left: var(--bk-x);
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  pointer-events: auto;
  transform: translate(-50%, -50%);
}
.bk-energy-point span {
  display: grid;
  width: clamp(25px, 2.7vw, 34px);
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid #ffe5a3;
  border-radius: 50%;
  background: #fffdf3;
  color: var(--bk-ink);
  box-shadow: 0 2px 7px #31251f60;
  font-size: .82rem;
  font-weight: 700;
}
.bk-energy-point:hover span, .bk-energy-point[aria-pressed="true"] span { background: var(--bk-ink); color: #fffefa; }
.bk-energy-caption { padding: clamp(12px, 1.65vw, 23px); }
.bk-energy-caption h2 { color: var(--bk-ink); font-size: clamp(1.13rem, 1.55vw, 1.58rem); letter-spacing: -.045em; }
.bk-energy-legend {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  padding: 0;
  margin-top: .65rem !important;
  list-style: none;
}
.bk-energy-legend li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-content: start;
  gap: .37rem;
  padding: .53rem;
  border: 1px solid var(--bk-line);
  border-radius: 8px;
  background: var(--bk-wash);
}
.bk-energy-legend li > span { color: var(--bk-link); font-size: .7rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.bk-energy-legend li:first-child { background: var(--bk-sun); }
.bk-energy-legend li:nth-child(2) { background: var(--bk-sky); }
.bk-energy-legend li[data-active] { border-color: #6b9483; box-shadow: inset 0 0 0 1px #6b9483; }
.bk-energy-legend h3 { color: var(--bk-ink); font-size: .84rem; line-height: 1.25; letter-spacing: -.016em; }
.bk-energy-legend p { margin-top: .2rem; color: var(--bk-muted); font-size: .76rem; line-height: 1.38; }
.bk-energy-note {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .23rem .75rem;
  margin-top: .65rem !important;
  color: var(--bk-muted);
  font-size: .73rem;
}
.bk-energy-note span { margin-left: auto; }
.bk-energy-status { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.bk-spec-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(22px, 3.1vw, 42px) !important;
  padding-block: 18px;
  border-block: 1px solid var(--bk-line);
}
.bk-spec-strip > div { display: grid; align-content: center; gap: 2px; padding-inline: clamp(12px, 3.5vw, 42px); }
.bk-spec-strip > div:first-child { padding-left: 0; }
.bk-spec-strip > div + div { border-left: 1px solid var(--bk-line); }
.bk-spec-strip dt { color: var(--bk-muted); font-size: clamp(.7rem, .9vw, .81rem); }
.bk-spec-strip dd {
  margin: 0;
  font-size: clamp(1.1rem, 2.4vw, 2.3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.065em;
}
.bk-spec-strip dd span { font-size: clamp(.72rem, 1.1vw, .98rem); letter-spacing: -.02em; }
.bk-hero--scene .bk-spec-strip { gap: 9px; padding: 0; border: 0; margin-top: 12px !important; }
.bk-hero--scene .bk-spec-strip > div {
  min-width: 0;
  padding: clamp(9px, 1.45vw, 19px);
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-card);
}
.bk-hero--scene .bk-spec-strip > div:nth-child(2) { background: var(--bk-mint); }
.bk-hero--scene .bk-spec-strip > div:nth-child(3) { background: var(--bk-sun); }

.bk-quick-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
  margin-top: 12px;
}
.bk-quick-nav a {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .75rem clamp(12px, 1.4vw, 19px);
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-sun);
  text-decoration: none;
  line-height: 1.28;
}
.bk-quick-nav a:nth-child(2) { background: var(--bk-sky); }
.bk-quick-nav a:nth-child(3) { background: var(--bk-mint); }
.bk-quick-nav a:hover { border-color: var(--bk-link); }
.bk-quick-nav small, .bk-quick-nav strong { display: block; }
.bk-quick-nav small { margin-bottom: .2rem; color: var(--bk-muted); font-size: .76rem; }
.bk-quick-nav a > span:last-child { color: var(--bk-link); font-size: 1.15rem; }

.bk-power-grid, .bk-route-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(12px, 1.8vw, 24px);
  margin-top: clamp(18px, 2.4vw, 34px);
}
.bk-power-grid { grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr); }
.bk-power-demo, .bk-power-context > div, .bk-power-year, .bk-route-card {
  min-width: 0;
  padding: clamp(17px, 2.55vw, 35px);
  border: 1px solid var(--bk-line);
  border-radius: calc(var(--bk-radius) + 3px);
  background: var(--bk-card);
}
.bk-power-demo figcaption h3, .bk-power-context h3 { margin-top: .5rem; color: var(--bk-ink); }
.bk-power-demo figcaption { margin-bottom: 1.1rem; }
.bk-power-controls fieldset {
  min-width: 0;
  margin: 0 0 .95rem;
  padding: 0;
  border: 0;
}
.bk-power-controls legend { margin-bottom: .4rem; padding: 0; font-size: .85rem; font-weight: 700; }
.bk-power-choices { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.bk-power-choices--devices { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bk-power-choices label {
  position: relative;
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: .35rem .4rem;
  border: 1px solid var(--bk-line);
  border-radius: 8px;
  background: var(--bk-paper);
  font-size: .82rem;
  line-height: 1.32;
  text-align: center;
  cursor: pointer;
}
.bk-power-choices label:has(input:checked) { border-color: var(--bk-link); background: var(--bk-mint); font-weight: 700; }
.bk-power-choices label:has(input:focus-visible) { outline: 3px solid #3e7664; outline-offset: 2px; }
.bk-power-choices input { position: absolute; width: 1px; height: 1px; margin: 0; clip-path: inset(50%); }
.bk-power-choices small { display: block; color: var(--bk-muted); font-size: .74rem; }
.bk-power-result {
  margin-bottom: .8rem;
  padding: clamp(14px, 1.7vw, 24px);
  border-radius: 10px;
  background: var(--bk-wash);
}
.bk-power-demand { font-weight: 700; line-height: 1.45; }
.bk-power-bar {
  height: 10px;
  margin: .85rem 0 .8rem;
  border-radius: 999px;
  background: linear-gradient(to right, #4b8065 var(--bk-power-share, 100%), #a8b9c1 var(--bk-power-share, 100%));
}
.bk-power-values { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.bk-power-values div { padding: .55rem .62rem; border-radius: 8px; background: var(--bk-card); }
.bk-power-values dt { display: flex; align-items: center; gap: .4rem; font-size: .77rem; line-height: 1.25; }
.bk-power-values dt i { width: 8px; height: 8px; flex: none; border-radius: 50%; background: #4b8065; }
.bk-power-values div:nth-child(2) dt i { background: #a8b9c1; }
.bk-power-values dd { margin: .18rem 0 0; font-size: clamp(1.22rem, 2.2vw, 1.85rem); font-weight: 700; letter-spacing: -.055em; font-variant-numeric: tabular-nums; }
.bk-power-extra { margin-top: .55rem !important; color: var(--bk-muted); font-size: .81rem; }
.bk-power-context { display: grid; align-content: start; gap: 10px; }
.bk-power-context > div:first-child { background: var(--bk-mint); }
.bk-power-context .bk-power-storage { background: var(--bk-sky); }
.bk-use-cases { display: grid; gap: 9px; margin-top: .8rem !important; padding: 0; list-style: none; }
.bk-use-cases li { display: grid; gap: .16rem; padding-top: .53rem; border-top: 1px solid var(--bk-line); }
.bk-use-cases span, .bk-power-storage p:not(.bk-kicker), .bk-power-year p:not(.bk-kicker) {
  color: var(--bk-muted);
  font-size: .88rem;
  line-height: 1.48;
}
.bk-power-storage p:not(.bk-kicker), .bk-power-year p:not(.bk-kicker) { margin-top: .58rem; }
.bk-power-year {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: clamp(12px, 2.8vw, 38px);
  background: var(--bk-sun);
}
.bk-power-year h3 { margin-top: .5rem; font-size: clamp(1.35rem, 2.15vw, 1.95rem); }
.bk-power-year .bk-text-link { margin-top: .4rem; }

.bk-route-card { display: flex; flex-direction: column; align-items: flex-start; gap: .58rem; background: var(--bk-mint); }
.bk-route-card:nth-child(2) { background: var(--bk-sky); }
.bk-route-icon {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: .16rem;
  place-items: center;
  border-radius: 11px;
  background: var(--bk-card);
  color: var(--bk-link);
}
.bk-route-icon svg { width: 31px; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.bk-route-card > p:not(.bk-kicker, .bk-service-price) { color: var(--bk-muted); }
.bk-route-card > .bk-text-link { margin-top: auto; }
.bk-route-note {
  margin-top: 12px !important;
  padding: .8rem 1rem;
  border-left: 3px solid #bd9452;
  border-radius: 0 8px 8px 0;
  background: var(--bk-sun);
  color: var(--bk-ink);
  font-size: .9rem;
}
.bk-shell .bk-source-small {
  display: block;
  width: fit-content;
  padding: .18rem 0;
  color: var(--bk-link);
  font-size: .75rem;
  text-underline-offset: .18em;
}
.bk-service-options .bk-route-card:first-child { background: var(--bk-sun); }
.bk-service-price {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: .55rem;
  font-size: clamp(1.65rem, 3.3vw, 2.95rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -.065em;
}
.bk-service-price small { color: var(--bk-muted); font-size: .79rem; font-weight: 400; letter-spacing: normal; }
.bk-service-options .bk-btn { margin-top: auto; }
.bk-request-guide {
  margin-top: 12px;
  padding: .75rem 1rem;
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-card);
}
.bk-request-guide summary { min-height: 28px; font-weight: 700; }
.bk-request-guide p { margin-top: .48rem !important; color: var(--bk-muted); }
.bk-provider-note { margin-top: .5rem !important; }
.bk-fit--purchase [data-fit-action] { display: flex; }
.bk-fit--purchase [data-fit-contact] { margin-top: .38rem; }

.bk-video, .bk-story-split, .bk-editorial-head, .bk-two-col, .bk-product-grid, .bk-contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
  gap: clamp(26px, 4.6vw, 70px);
}
.bk-video {
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  align-items: center;
  overflow: hidden;
  border-radius: var(--bk-radius);
  background: var(--bk-wash);
}
.bk-video-copy { padding: clamp(26px, 4.4vw, 64px); padding-right: 0; }
.bk-video h2, .bk-story-copy h2 { margin-top: .4em; }
.bk-video-copy > p:not(.bk-kicker), .bk-story-copy > p:not(.bk-kicker) { margin-block: 1rem .6rem; color: var(--bk-muted); }
.bk-video-media { margin: 0; min-width: 0; }
.bk-video-media img { width: 100%; aspect-ratio: 1.52; object-fit: cover; }
.bk-video-media figcaption { padding: 8px 12px; background: var(--bk-card); }
.bk-video-media video { display: block; width: 100%; height: auto; }

.bk-step-list, .bk-parts-list, .bk-help-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(25px, 3.6vw, 48px) !important;
  padding: 0;
  list-style: none;
  border-block: 1px solid var(--bk-line);
}
.bk-step-list li, .bk-parts-list li, .bk-help-grid article { padding: clamp(19px, 2.6vw, 37px); }
.bk-step-list li:first-child, .bk-parts-list li:first-child, .bk-help-grid article:first-child { padding-left: 0; }
.bk-step-list li + li, .bk-parts-list li + li, .bk-help-grid article + article { border-left: 1px solid var(--bk-line); }
.bk-step-index, .bk-parts-list li > span {
  color: var(--bk-link);
  font-size: .77rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: .06em;
}
.bk-step-list h3, .bk-parts-list h3, .bk-help-grid h2 { margin-top: .58rem; }
.bk-step-list p, .bk-parts-list p, .bk-help-grid p { margin-top: .7rem; color: var(--bk-muted); }
.bk-parts-list p { hyphens: auto; overflow-wrap: anywhere; }
.bk-step-list .bk-text-link, .bk-help-grid .bk-text-link { margin-top: .55rem; }
.bk-home-steps .bk-step-list { gap: 12px; border: 0; }
.bk-home-steps .bk-step-list li {
  min-width: 0;
  padding: clamp(16px, 2.3vw, 31px);
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-card);
}
.bk-home-steps .bk-step-list li:nth-child(2) { background: var(--bk-mint); }
.bk-home-steps .bk-step-list li:nth-child(3) { background: var(--bk-sun); }
.bk-story-split { align-items: center; border-radius: var(--bk-radius); background: var(--bk-mint); overflow: hidden; }
.bk-story-media img { width: 100%; aspect-ratio: 1.45; object-fit: cover; }
.bk-story-media figcaption { padding: 8px 12px; color: var(--bk-muted); }
.bk-story-copy { padding: clamp(25px, 3.6vw, 54px) clamp(28px, 4.3vw, 60px) clamp(25px, 3.6vw, 54px) 0; }

.bk-page-section { padding-top: clamp(23px, 3vw, 46px); }
.bk-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .65rem;
  margin-bottom: clamp(28px, 4.4vw, 62px) !important;
  color: var(--bk-muted);
  font-size: .82rem;
}
.bk-breadcrumb a { text-underline-offset: .24em; }
.bk-page-title { max-width: 850px; }
.bk-page-title h1, .bk-editorial-head h1, .bk-policy h1, .bk-product-intro h1 { margin: .25em 0 .28em; }
.bk-page-title .bk-lead { max-width: 60ch; }
.bk-editorial-head { align-items: center; }
.bk-editorial-head .bk-btn, .bk-editorial-head .bk-actions, .bk-editorial-head .bk-text-link { margin-top: 1.15rem; }
.bk-editorial-head .bk-actions .bk-btn, .bk-editorial-head .bk-actions .bk-text-link { margin-top: 0; }
.bk-editorial-head img { width: 100%; aspect-ratio: 1.25; object-fit: cover; border-radius: var(--bk-radius); background: var(--bk-wash); }
.bk-editorial-head figcaption { padding-top: .55rem; }
.bk-product-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  grid-template-areas: "gallery intro" "gallery details";
  grid-template-rows: max-content auto;
  column-gap: clamp(26px, 5vw, 76px);
  row-gap: 18px;
}
.bk-gallery { grid-area: gallery; }
.bk-product-details { grid-area: details; }
.bk-product-intro { grid-area: intro; padding-top: 4px; }
.bk-product-intro h1 { font-size: clamp(1.95rem, 3.55vw, 3.8rem); }
.bk-gallery-stage { position: relative; }
.bk-gallery:not([data-enhanced]) .bk-gallery-stage figure + figure:not([hidden]) { margin-top: 12px; }
.bk-gallery-stage img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center 60%;
  border-radius: var(--bk-radius);
  background: var(--bk-wash);
}
.bk-gallery-stage figcaption { padding: .55rem 0 0; }
.bk-gallery-zoom, .bk-gallery-dialog form button {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--bk-line);
  border-radius: 5px;
  background: var(--bk-card);
  font-size: 1.35rem !important;
}
.bk-gallery-zoom { position: absolute; top: 12px; right: 12px; }
.bk-gallery-tabs { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.bk-gallery-tabs button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  padding: 4px 9px 4px 4px;
  border: 1px solid var(--bk-line);
  border-radius: 5px;
  background: transparent;
  font-size: .78rem;
  font-weight: 700;
}
.bk-gallery-tabs button[aria-pressed="true"] { border-color: var(--bk-link); background: var(--bk-wash); }
.bk-gallery-tabs button img { width: 45px; height: 35px; object-fit: cover; border-radius: 2px; }
.bk-gallery-dialog {
  width: min(95vw, 1100px);
  max-height: 94vh;
  padding: clamp(10px, 2vw, 24px);
  border: 0;
  border-radius: 5px;
  background: var(--bk-card);
}
.bk-gallery-dialog::backdrop { background: #0c1711cc; }
.bk-gallery-dialog form { display: flex; justify-content: flex-end; margin-bottom: 8px; }
.bk-gallery-dialog figure img { width: 100%; max-height: 73vh; object-fit: contain; }
.bk-gallery-dialog figcaption { margin-top: .6rem; }
.bk-chip-list { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin-top: 1.1rem !important; list-style: none; }
.bk-chip-list li { padding: 5px 10px; border: 1px solid var(--bk-line); border-radius: 4px; color: var(--bk-link); font-size: .78rem; font-weight: 700; }
.bk-brief-specs { font-size: .88rem; }
.bk-brief-specs > div, .bk-facts > div {
  display: grid;
  grid-template-columns: minmax(0, .65fr) minmax(0, 1.35fr);
  gap: .5rem 1rem;
  padding: .75rem 0;
  border-top: 1px solid var(--bk-line);
}
.bk-brief-specs dt, .bk-facts dt { font-weight: 700; hyphens: auto; overflow-wrap: anywhere; }
.bk-brief-specs dd, .bk-facts dd { margin: 0; color: var(--bk-muted); overflow-wrap: anywhere; }
.bk-facts { border-bottom: 1px solid var(--bk-line); }
.bk-product-order { margin: 1rem 0 .35rem; }
.bk-order-box { padding: 1.05rem 1.15rem; border-left: 3px solid #639585; border-radius: 0 var(--bk-radius) var(--bk-radius) 0; background: var(--bk-mint); }
.bk-order-box p + p, .bk-order-box form { margin-top: .45rem; }
.bk-order-box p:not(:has(strong)) { color: var(--bk-muted); }
.bk-order-box .bk-order-price { font-size: 1.65rem; font-weight: 700; }
.bk-fit-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-top: .9rem;
  padding: .82rem 1rem;
  border: 1px solid var(--bk-line);
  border-radius: 5px;
  background: var(--bk-card);
  text-decoration: none;
}
.bk-fit-link:hover { border-color: var(--bk-link); }
.bk-fit-link > span:first-child { display: grid; gap: .12rem; }
.bk-fit-link strong { line-height: 1.3; }
.bk-fit-link span span { color: var(--bk-muted); font-size: .84rem; }
.bk-product-jump { display: flex; flex-wrap: wrap; gap: .1rem 1.15rem; margin-top: .65rem; }
.bk-product-jump a { display: flex; min-height: 36px; align-items: center; color: var(--bk-link); font-size: .84rem; text-underline-offset: .24em; }
.bk-parts-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.bk-docs-panel, .bk-cta-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .86fr);
  align-items: center;
  gap: clamp(25px, 4.5vw, 64px);
  padding: clamp(24px, 4vw, 58px);
  border-radius: var(--bk-radius);
  background: var(--bk-wash);
}
.bk-docs-panel h2, .bk-cta-band h2 { margin-top: .45em; }
.bk-docs-panel p:not(.bk-kicker) { margin-top: .9rem; color: var(--bk-muted); }
.bk-docs-panel .bk-text-link { margin-top: .75rem; }
.bk-docs-list, .bk-source-links { padding: 0; list-style: none; }
.bk-docs-list li, .bk-source-links > a { display: flex; align-items: baseline; gap: 11px; padding: .75rem 0; border-bottom: 1px solid var(--bk-line); }
.bk-docs-list li span { color: var(--bk-link); font-size: .77rem; font-weight: 700; }
.bk-source-links > a { width: auto !important; }
.bk-cta-band { grid-template-columns: minmax(0, 1fr) auto; background: var(--bk-sky); }

.bk-check-list { display: grid; gap: 9px; }
.bk-check-list label {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: .9rem;
  padding: .9rem 1rem;
  border: 1px solid var(--bk-line);
  border-radius: 5px;
  background: var(--bk-card);
  cursor: pointer;
}
.bk-check-list label:has(input:checked) { border-color: #829375; background: #eef1e1; }
.bk-check-list input { width: 20px; height: 20px; margin: 3px 0 0; accent-color: #405b3b; }
.bk-check-list label > span { display: grid; gap: 4px; }
.bk-check-list label > span > span { color: var(--bk-muted); font-size: .92rem; }
.bk-check-progress { width: fit-content; padding: 5px 9px; border-radius: 4px; background: var(--bk-wash); font-size: .84rem; font-weight: 700; }
.bk-check-progress + .bk-text-link { margin-top: .6rem; }

.bk-fit-section { margin-top: clamp(45px, 6vw, 86px); }
.bk-fit {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(18px, 3.5vw, 48px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 36px);
}
.bk-fit-inputs, .bk-fit-card {
  min-width: 0;
  padding: clamp(15px, 2.5vw, 32px);
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-card);
}
.bk-fit-card { background: var(--bk-mint); }
.bk-fit-card h3 { margin: .55rem 0 .7rem; }
.bk-fit-card p:not(.bk-kicker) { color: var(--bk-muted); }
.bk-fit-card .bk-fine, .bk-fit-card a { margin-top: 1rem; }
.bk-fit fieldset {
  min-width: 0;
  margin: 0 0 1.2rem;
  padding: 0 0 1.15rem;
  border: 0;
  border-bottom: 1px solid var(--bk-line);
}
.bk-fit legend { margin-bottom: .65rem; padding: 0; font-weight: 700; line-height: 1.4; }
.bk-fit legend span {
  margin-right: .35rem;
  color: var(--bk-link);
  font-size: .77rem;
  font-variant-numeric: tabular-nums;
}
.bk-fit-options { display: flex; flex-wrap: wrap; gap: 7px; }
.bk-fit-options label {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: .43rem;
  padding: .5rem .67rem;
  border: 1px solid var(--bk-line);
  border-radius: 4px;
  cursor: pointer;
  font-size: .83rem;
}
.bk-fit-options label:has(input:checked) { border-color: var(--bk-link); background: var(--bk-wash); font-weight: 700; }
.bk-fit-options input { flex: none; width: 15px; height: 15px; margin: 0; accent-color: var(--bk-link); }
.bk-fit-measures { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.bk-fit-measures label { display: grid; gap: .3rem; color: var(--bk-muted); font-size: .82rem; }
.bk-fit-measures input {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: .5rem .62rem;
  border: 1px solid var(--bk-line);
  border-radius: 4px;
  background: var(--bk-paper);
  color: var(--bk-ink);
  font-size: 1rem;
}
.bk-fit fieldset .bk-fine { margin-top: .5rem; }
.bk-fit-steps > div { padding: .68rem 0; border-top: 1px solid var(--bk-line); }
.bk-fit-steps dt { font-size: .85rem; font-weight: 700; }
.bk-fit-steps dd { margin: .18rem 0 0; color: var(--bk-muted); font-size: .91rem; }
.bk-fit-fallback { margin-top: 1rem; }
.bk-fit-fallback ul { margin-bottom: .6rem; padding-left: 1.2rem; }

.bk-help-grid h2 { font-size: clamp(1.24rem, 2vw, 1.7rem); }
.bk-faq { border-bottom: 1px solid var(--bk-line); }
.bk-faq details { border-top: 1px solid var(--bk-line); }
.bk-faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  gap: 12px;
  padding: 12px 0;
  list-style: none;
  font-weight: 700;
}
.bk-faq summary::after { content: "+"; font-size: 1.2rem; }
.bk-faq details[open] summary::after { content: "−"; }
.bk-faq p { padding-bottom: 1rem; color: var(--bk-muted); }

.bk-contact-topics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: clamp(24px, 4vw, 54px); }
.bk-contact-topics > a {
  position: relative;
  display: grid;
  gap: .28rem;
  align-content: start;
  padding: .9rem 2rem .95rem .95rem;
  border: 1px solid var(--bk-line);
  border-radius: 5px;
  background: var(--bk-card);
  text-decoration: none;
}
.bk-contact-topics > a[aria-current="true"], .bk-contact-topics > a:hover { border-color: #819765; background: var(--bk-wash); }
.bk-contact-topics > a > span:not([aria-hidden]) { color: var(--bk-muted); font-size: .8rem; }
.bk-contact-topics > a > span[aria-hidden] { position: absolute; top: .65rem; right: .8rem; color: var(--bk-link); }
.bk-contact-panel { grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); grid-template-areas: "note form"; align-items: stretch; }
.bk-contact-aside { grid-area: note; padding: clamp(22px, 3.5vw, 48px); border-radius: var(--bk-radius); background: var(--bk-sun); }
.bk-contact-aside h2 { margin-top: .4em; }
.bk-contact-aside p:not(.bk-kicker) { margin-top: 1rem; color: var(--bk-muted); }
.bk-contact-aside .bk-text-link { margin-top: 1rem; }
.bk-contact-card { grid-area: form; padding: clamp(17px, 3vw, 38px); border: 1px solid var(--bk-line); border-radius: var(--bk-radius); background: var(--bk-card); }
.bk-form-intro { margin-bottom: 1rem !important; color: var(--bk-muted); }
.bk-contact-form, .bk-form-row { display: grid; gap: 1rem; }
.bk-form-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bk-contact-form label, .bk-contact-draft label { display: grid; gap: .3rem; font-size: .9rem; font-weight: 700; }
.bk-contact-form :where(input, select, textarea), .bk-contact-draft textarea {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 46px;
  padding: .58rem .7rem;
  border: 1px solid #a7b2a0;
  border-radius: 4px;
  background: #fff;
  font-weight: 400;
}
.bk-contact-form textarea, .bk-contact-draft textarea { resize: vertical; }
.bk-honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.bk-fine { color: var(--bk-muted); font-size: .8rem; }
.bk-form-status { margin-bottom: .9rem !important; padding: .7rem .9rem; border-left: 3px solid var(--bk-link); background: var(--bk-wash); }
.bk-form-status.bk-form-error { border-color: #964b36; background: #faeee8; color: #6f3526; }
.bk-contact-draft { margin-top: 1.15rem; padding-top: 1rem; border-top: 1px solid var(--bk-line); }
.bk-contact-draft p { margin-bottom: .6rem; }
.bk-contact-draft button { margin-top: .45rem; }
.bk-policy { max-width: 840px; }
.bk-policy h2 { margin-top: 1.7rem; font-size: 1.38rem; letter-spacing: -.035em; }
.bk-policy h2 + p, .bk-policy .bk-facts { margin-top: .65rem; color: var(--bk-muted); }

.bk-footer { margin-top: var(--bk-section); padding: clamp(32px, 5vw, 64px) 0 18px; border-top: 1px solid var(--bk-line); background: var(--bk-mint); }
.bk-footer-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, .75fr)); gap: clamp(22px, 4vw, 60px); }
.bk-footer-brand p { max-width: 34ch; margin-top: .8rem; color: var(--bk-muted); }
.bk-footer nav { display: flex; flex-direction: column; align-items: flex-start; gap: .45rem; }
.bk-footer nav h2 { margin-bottom: .15rem; color: var(--bk-link); font: 700 .72rem/1.4 var(--bk-font); text-transform: uppercase; letter-spacing: .1em; }
.bk-footer nav a, .bk-footer-bottom > a { color: var(--bk-ink); text-decoration: none; font-size: .86rem; }
.bk-footer a:hover { text-decoration: underline; text-underline-offset: .25em; }
.bk-footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: .65rem 1.5rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--bk-line);
  color: var(--bk-muted);
  font-size: .8rem;
}
.bk-footer-bottom .bk-status-dot { margin-right: 4px; background: var(--bk-link); }
.bk-footer-bottom nav { flex-direction: row; gap: 1rem; }

.bk-shop-shell { width: min(1160px, calc(100% - var(--bk-gutter) - var(--bk-gutter))); margin: clamp(26px, 6vw, 80px) auto; }
.bk-shop-shell :where(.woocommerce-message, .woocommerce-info, .wc-block-components-notice-banner) { border-radius: 5px; }
.bk-shop-shell :where(input, select, textarea) { max-width: 100%; }
.bk-shop-shell :where(button, a.button, .wc-block-components-button) { border-radius: 5px; }

.bk-launch { margin-top: clamp(16px, 2.75vw, 38px); }
.bk-launch-reserve { margin-top: .85rem !important; color: var(--bk-muted); font-size: .85rem; }
.bk-launch-reserve a { color: var(--bk-link); font-weight: 700; text-underline-offset: .2em; }
.bk-savings-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .95fr); gap: clamp(18px, 3vw, 40px); align-items: start; margin-top: 1.6rem; }
.bk-savings-form { min-width: 0; padding: clamp(20px, 3vw, 38px); border: 1px solid var(--bk-line); border-radius: var(--bk-radius); background: var(--bk-card); }
.bk-savings-form fieldset { padding: 0; margin: 0 0 1.55rem; border: 0; min-width: 0; }
.bk-savings-form legend { padding: 0 0 .9rem; font-size: 1rem; font-weight: 700; }
.bk-savings-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .9rem; }
.bk-savings-form label { display: grid; gap: .35rem; font-size: .86rem; font-weight: 700; min-width: 0; }
.bk-savings-form :where(input:not([type=range]), select) { width: 100%; min-width: 0; min-height: 46px; padding: .65rem .7rem; border: 1px solid var(--bk-line); border-radius: 7px; background: var(--bk-paper); font-size: .88rem; font-weight: 400; }
.bk-savings-form small { color: var(--bk-muted); font-size: .73rem; font-weight: 400; }
.bk-savings-form .bk-fine { margin-top: .45rem; }
.bk-savings-form .bk-fine a { text-underline-offset: .2em; }
.bk-self-use-label { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 1.15rem; }
.bk-self-use-label output { white-space: nowrap; color: var(--bk-link); font-size: .8rem; font-weight: 700; }
.bk-savings-form input[type=range] { width: 100%; min-height: 44px; margin: 0; accent-color: var(--bk-link); cursor: pointer; }
.bk-savings-advanced { margin-bottom: 1.15rem; border-top: 1px solid var(--bk-line); border-bottom: 1px solid var(--bk-line); }
.bk-savings-advanced summary { padding: .8rem 0; font-size: .83rem; font-weight: 700; }
.bk-savings-advanced .bk-savings-fields { padding: 0 0 1rem; }
.bk-savings-form .bk-btn { width: 100%; justify-content: center; }
.bk-savings-form button:disabled { opacity: .55; cursor: wait; }
.bk-savings-error { margin: .5rem 0 1rem !important; padding: .7rem .85rem; border-left: 3px solid #aa5429; background: #fcf0dc; font-size: .84rem; }
.bk-savings-output { min-width: 0; padding: clamp(22px, 3.3vw, 44px); border: 1px solid #cddfd5; border-radius: var(--bk-radius); background: var(--bk-mint); }
.bk-savings-empty { display: flex; flex-direction: column; justify-content: center; min-height: 410px; }
.bk-savings-empty svg { width: 56px; height: 56px; margin-bottom: 1.5rem; stroke: #b96e30; stroke-width: 2; stroke-linecap: round; }
.bk-savings-empty h3 { font-size: clamp(1.7rem, 3vw, 2.7rem); }
.bk-savings-empty p { margin-top: 1rem; max-width: 37ch; color: var(--bk-muted); }
.bk-savings-output .bk-kicker { display: block; letter-spacing: .05em; font-size: .75rem; }
.bk-savings-output .bk-savings-result-heading { margin-top: .9rem; font-size: 1rem; font-weight: 400; letter-spacing: -.02em; }
.bk-savings-output .bk-savings-amount { margin-top: .3rem; font-size: clamp(2rem, 4.3vw, 3.9rem); font-weight: 700; letter-spacing: -.065em; line-height: 1.13; font-variant-numeric: tabular-nums; }
.bk-savings-subtitle { margin-top: .4rem !important; color: var(--bk-muted); font-size: .85rem; }
.bk-savings-totals { margin-top: 1.25rem !important; }
.bk-savings-totals > div { display: flex; align-items: baseline; justify-content: space-between; gap: 15px; padding: .75rem 0; border-bottom: 1px solid #cadcd1; font-size: .86rem; }
.bk-savings-totals dt { max-width: 55%; }
.bk-savings-totals dd { margin: 0; text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }
.bk-savings-use-bar { height: 9px; margin: 1.2rem 0 .55rem; overflow: hidden; border-radius: 20px; background: #bdcbc6; }
.bk-savings-use-bar span { display: block; height: 100%; width: 60%; background: #4d846b; }
.bk-savings-payback { margin-top: 1.2rem; padding: 1rem 1.1rem; border-radius: 8px; background: #fffefaad; }
.bk-savings-payback h4 { margin: 0 0 .35rem; font-size: .88rem; }
.bk-savings-payback p { color: var(--bk-muted); font-size: .84rem; }
.bk-savings-output .bk-text-link { margin-top: 1.15rem; }
.bk-savings-result-note { margin: 1rem 0 .55rem !important; }
.bk-savings-months { margin-top: 1rem; padding-block: .8rem; border-block: 1px solid #cadcd1; }
.bk-savings-months summary { font-size: .83rem; font-weight: 700; }
.bk-savings-month-bars { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 5px; margin: 1rem 0 .7rem; }
.bk-savings-month { min-width: 0; text-align: center; font-size: .66rem; }
.bk-savings-column { display: flex; align-items: end; height: 90px; margin-bottom: .3rem; }
.bk-savings-column span { display: block; width: 100%; border-radius: 3px 3px 0 0; background: #679a81; }
.bk-savings-month small { display: block; color: var(--bk-muted); font-size: .6rem; }
.bk-savings-method, .bk-options-details { padding: 1rem 0; margin-top: 1.15rem; border-top: 1px solid var(--bk-line); border-bottom: 1px solid var(--bk-line); }
.bk-savings-method summary, .bk-options-details summary { font-size: .88rem; font-weight: 700; }
.bk-savings-method p, .bk-options-details p { margin-top: .8rem; color: var(--bk-muted); font-size: .84rem; max-width: 100ch; }
.bk-options-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 1.6rem; }
.bk-options-grid article { display: flex; flex-direction: column; align-items: start; gap: .8rem; min-width: 0; padding: clamp(20px, 2.7vw, 36px); border: 1px solid var(--bk-line); border-radius: var(--bk-radius); background: var(--bk-sun); }
.bk-options-grid article:nth-child(2) { background: var(--bk-mint); }
.bk-options-grid article:nth-child(3) { background: var(--bk-sky); }
.bk-option-label { padding: .35rem .55rem; border: 1px solid #536b552b; border-radius: 5px; background: #fffefa99; font-size: .72rem; line-height: 1.3; }
.bk-option-number { margin-top: .5rem; color: var(--bk-link); font-size: 1.8rem; line-height: 1; letter-spacing: -.06em; }
.bk-options-grid h3 { font-size: clamp(1.35rem, 2vw, 1.85rem); }
.bk-options-grid p { color: var(--bk-muted); font-size: .89rem; }
.bk-options-grid ul { padding-left: 1.1rem; font-size: .83rem; color: var(--bk-muted); }
.bk-options-grid li { padding-block: .16rem; }
.bk-options-grid .bk-fine:last-child, .bk-options-grid .bk-text-link:last-child { margin-top: auto; padding-top: .8rem; }
.bk-options-grid .bk-fine { font-size: .77rem; }
.bk-options-question { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 1rem; }
.bk-options-question p { color: var(--bk-muted); font-size: .89rem; }
@media (max-width: 850px) { .bk-savings-grid { grid-template-columns: minmax(0, 1fr); } .bk-savings-empty { min-height: 180px; } .bk-options-grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) { .bk-savings-fields { grid-template-columns: minmax(0, 1fr); } .bk-self-use-label { align-items: start; flex-direction: column; gap: .2rem; } .bk-savings-totals > div { flex-wrap: wrap; gap: .3rem; } .bk-savings-totals dt { max-width: none; } .bk-savings-month-bars { gap: 3px; } }
.bk-launch-grid {
  display: grid;
  grid-template-columns: minmax(0, .84fr) minmax(0, 1.16fr);
  align-items: center;
  overflow: hidden;
  border: 1px solid #e2e3d7;
  border-radius: clamp(16px, 2.25vw, 29px);
  background: linear-gradient(135deg, #fcf1de 0%, #fffdf7 67%);
}
.bk-launch-copy { min-width: 0; padding: clamp(24px, 3.55vw, 52px); }
.bk-launch-copy h1 {
  margin: .28em 0 .3em;
  font-size: clamp(2.5rem, 4.9vw, 5.1rem);
  line-height: .98;
  letter-spacing: -.07em;
}
.bk-launch-copy h1 em {
  display: block;
  color: var(--bk-link);
  font-family: "BK Serif", Georgia, serif;
  font-weight: 400;
}
.bk-launch-copy .bk-lead { max-width: 32ch; }
.bk-launch-copy .bk-actions { margin-top: clamp(16px, 2.4vw, 30px); gap: .4rem 1.2rem; }
.bk-launch-copy .bk-text-link { min-height: 44px; }
.bk-launch-photo { position: relative; align-self: stretch; overflow: hidden; background: #e7dac5; }
.bk-launch-photo img { width: 100%; height: 100%; min-height: 100%; max-height: min(515px, 64svh); aspect-ratio: 4 / 3; object-fit: cover; object-position: 51% 55%; }
.bk-launch-photo figcaption {
  position: absolute;
  inset: auto 12px 12px auto;
  padding: .25rem .55rem;
  border-radius: 4px;
  background: #fffef6ed;
  color: var(--bk-ink);
}
.bk-launch-specs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 10px !important;
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-card);
}
.bk-launch-specs > div { min-width: 0; padding: .82rem clamp(10px, 2.2vw, 32px); }
.bk-launch-specs > div + div { border-left: 1px solid var(--bk-line); }
.bk-launch-specs dt { font-size: clamp(.86rem, 1.35vw, 1.12rem); font-weight: 700; line-height: 1.22; }
.bk-launch-specs dd { margin: .18rem 0 0; color: var(--bk-muted); font-size: .79rem; line-height: 1.3; overflow-wrap: anywhere; hyphens: auto; }

.bk-fit-band, .bk-use-grid, .bk-next-step { display: grid; gap: clamp(16px, 3.5vw, 45px); align-items: center; }
.bk-fit-band {
  grid-template-columns: minmax(0, .66fr) minmax(0, 1.34fr);
  padding: clamp(22px, 3.8vw, 52px);
  border-radius: calc(var(--bk-radius) + 4px);
  background: var(--bk-mint);
}
.bk-fit-band h2, .bk-use-brief h2, .bk-next-step h2 { margin-top: .32em; }
.bk-fit-band h2 { font-size: clamp(1.8rem, 3vw, 3.05rem); }
.bk-fit-band .bk-text-link { margin-top: .55rem; min-height: 44px; }
.bk-fit-criteria { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); padding: 0; list-style: none; }
.bk-fit-criteria li { min-width: 0; padding: .2rem clamp(10px, 1.6vw, 22px); border-left: 1px solid #bcd0c4; }
.bk-fit-criteria li > span { color: var(--bk-link); font-size: .72rem; font-weight: 700; }
.bk-fit-criteria h3 { margin: .42rem 0; font-size: clamp(.93rem, 1.33vw, 1.18rem); line-height: 1.2; letter-spacing: -.024em; }
.bk-fit-criteria p, .bk-use-brief > p:not(.bk-kicker) { color: var(--bk-muted); }
.bk-fit-criteria p { font-size: .85rem; line-height: 1.45; }
.bk-use-grid { grid-template-columns: minmax(0, .77fr) minmax(0, 1.23fr); }
.bk-use-brief > p:not(.bk-kicker) { max-width: 39ch; margin-top: .78rem; }
.bk-use .bk-energy { width: 100%; box-shadow: none; }
.bk-use .bk-energy-caption h3 { font-size: clamp(1rem, 1.65vw, 1.4rem); }
.bk-use .bk-energy-legend strong { color: var(--bk-ink); font-size: .83rem; line-height: 1.25; }
.bk-use-example { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; max-width: 360px; margin-top: 1rem !important; }
.bk-use-example > div { padding: .65rem .8rem; border: 1px solid var(--bk-line); border-radius: 8px; background: var(--bk-card); }
.bk-use-example dt { font-size: .83rem; }
.bk-use-example dd { margin: .13rem 0 0; font-size: 1.25rem; font-weight: 700; line-height: 1.3; }
.bk-disclosure {
  margin-top: 10px;
  padding: 0 clamp(12px, 1.8vw, 22px);
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-card);
}
.bk-disclosure > summary { min-height: 51px; padding: .8rem 0; font-weight: 700; }
.bk-disclosure > summary::marker { color: var(--bk-link); }
.bk-disclosure[open] { padding-bottom: .9rem; }
.bk-disclosure > p, .bk-disclosure > ol { color: var(--bk-muted); }
.bk-disclosure > p + p, .bk-disclosure > ol + a { margin-top: .5rem; }
.bk-disclosure > ol { padding-left: 1.3rem; }
.bk-disclosure > ol li + li { margin-top: .38rem; }
.bk-disclosure .bk-power-grid { margin-top: 2px; }
.bk-power-context p:not(.bk-kicker) { margin-top: .55rem; color: var(--bk-muted); }
.bk-detail-stack h2 { margin-bottom: 1rem; font-size: clamp(1.7rem, 2.7vw, 2.85rem); }
.bk-next-step {
  grid-template-columns: minmax(0, 1fr) auto;
  padding: clamp(20px, 3vw, 40px);
  border-radius: var(--bk-radius);
  background: var(--bk-sun);
}
.bk-next-step h2 { font-size: clamp(1.6rem, 3vw, 2.8rem); }

.bk-product--focus .bk-breadcrumb, .bk-fit-first .bk-breadcrumb { margin-bottom: clamp(12px, 2vw, 25px) !important; }
.bk-product--focus .bk-product-grid { column-gap: clamp(16px, 4vw, 57px); row-gap: 13px; }
.bk-product--focus .bk-product-intro .bk-lead { max-width: 37ch; }
.bk-product--focus .bk-product-order { margin-top: 0; }
.bk-product--focus .bk-gallery-stage figure { position: relative; }
.bk-product--focus .bk-gallery-stage figcaption {
  position: absolute;
  right: 8px;
  bottom: 8px;
  max-width: calc(100% - 16px);
  padding: .22rem .48rem;
  border-radius: 4px;
  background: #fffef6ed;
  color: var(--bk-ink);
  font-size: .72rem;
}
.bk-order-box--preview {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .55rem 1rem;
  background: var(--bk-sun);
  border-left-color: #c69b53;
}
.bk-order-box--preview .bk-fine { margin-top: .15rem; }
.bk-order-box--preview .bk-btn { min-height: 44px; }
.bk-product--focus .bk-product-jump { gap: 0 .86rem; }
.bk-product--focus .bk-product-jump a { min-height: 44px; }
.bk-components {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(14px, 2.2vw, 28px) !important;
  padding: 0;
  border: 1px solid var(--bk-line);
  border-radius: var(--bk-radius);
  background: var(--bk-card);
  list-style: none;
}
.bk-components li { min-width: 0; display: grid; align-content: start; gap: .6rem; padding: clamp(12px, 2vw, 27px); }
.bk-components li + li { border-left: 1px solid var(--bk-line); }
.bk-components svg { width: 32px; stroke: var(--bk-link); stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.bk-components h3 { font-size: clamp(.95rem, 1.6vw, 1.28rem); line-height: 1.22; letter-spacing: -.02em; hyphens: auto; }
.bk-components p { margin-top: .18rem; color: var(--bk-muted); font-size: .83rem; line-height: 1.4; }

.bk-fit-first .bk-section-heading h1 { margin-top: .28em; font-size: clamp(2.05rem, 4.45vw, 4.1rem); }
.bk-fit-first .bk-section-heading > p:not(.bk-kicker) { margin-top: .6rem; }
.bk-fit-first .bk-fit { margin-top: clamp(14px, 2vw, 25px); }
.bk-fit-first .bk-fit fieldset { margin-bottom: .82rem; padding-bottom: .82rem; }
.bk-fit-first .bk-fit-options label { border-radius: 8px; }
.bk-fit-optional { margin-bottom: .6rem; color: var(--bk-muted); font-size: .87rem; }
.bk-fit-optional summary { min-height: 42px; padding: .58rem 0; font-weight: 700; }
.bk-fit-optional[open] { margin-bottom: 1rem; }

@media (min-width: 971px) and (max-height: 840px) {
  .bk-hero--scene { padding-top: 18px; }
  .bk-hero--scene .bk-hero-grid { padding-block: 22px; }
  .bk-energy { width: min(100%, max(500px, calc((100svh - 300px) * 1.5))); justify-self: end; }
  .bk-energy-caption { padding: 14px 16px; }
}
@media (max-width: 970px) {
  .bk-nav { display: none; }
  .bk-header-actions { margin-left: auto; }
  .bk-menu { display: block; }
  .bk-hero-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .bk-hero--scene .bk-hero-grid { grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr); }
  .bk-product-grid { grid-template-columns: minmax(0, 1fr) minmax(0, .94fr); }
  .bk-contact-topics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 850px) {
  .bk-hero--scene .bk-hero-grid { grid-template-columns: minmax(0, 1fr); padding: clamp(13px, 3.1vw, 24px); }
  .bk-hero--scene .bk-hero-copy { padding: .32rem .16rem 0; }
  .bk-hero--scene .bk-hero-copy h1 { font-size: clamp(2.2rem, 9vw, 4.05rem); }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 78px; }
  .bk-header-inner { min-height: 63px; }
  .bk-header-actions { display: none; }
  .bk-hero-grid, .bk-video, .bk-story-split, .bk-editorial-head, .bk-two-col, .bk-product-grid, .bk-contact-panel, .bk-docs-panel, .bk-cta-band { grid-template-columns: minmax(0, 1fr); }
  .bk-hero-copy { padding-block: 0; }
  .bk-hero-copy h1 { font-size: clamp(2.4rem, 10.6vw, 4.95rem); }
  .bk-hero-media img { object-position: center 54%; }
  .bk-hero-media figcaption { font-size: .7rem; }
  .bk-spec-strip { padding-block: 12px; }
  .bk-spec-strip > div { padding-inline: 10px; }
  .bk-spec-strip dd span { display: inline-block; }
  .bk-video { gap: 0; }
  .bk-video-copy, .bk-story-copy { padding: 24px; }
  .bk-story-split { gap: 0; }
  .bk-story-copy { padding-top: 16px; }
  .bk-product-grid { grid-template-areas: "intro" "gallery" "details"; }
  .bk-contact-panel { grid-template-areas: "form" "note"; }
  .bk-fit { grid-template-columns: minmax(0, 1fr); }
  .bk-power-grid, .bk-power-year, .bk-route-grid { grid-template-columns: minmax(0, 1fr); }
  .bk-launch-grid, .bk-fit-band, .bk-use-grid, .bk-next-step { grid-template-columns: minmax(0, 1fr); }
  .bk-launch-copy { padding: clamp(16px, 4.3vw, 30px); }
  .bk-launch-copy h1 { font-size: clamp(2.14rem, 8.6vw, 3.65rem); }
  .bk-launch-copy .bk-lead { font-size: 1rem; line-height: 1.5; }
  .bk-launch-photo img { height: auto; min-height: 0; max-height: none; aspect-ratio: 16 / 10; }
  .bk-product--focus { padding-top: 15px; }
  .bk-product--focus .bk-gallery-stage img { aspect-ratio: 5 / 3; }
  .bk-product--focus #galerie-set img { object-fit: contain; background: #eee9df; }
  .bk-components { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-components li:nth-child(3) { border-left: 0; }
  .bk-components li:nth-child(n+3) { border-top: 1px solid var(--bk-line); }
  .bk-use-brief > p:not(.bk-kicker) { max-width: 48ch; }
  .bk-product-intro { padding-top: 0; }
  .bk-product-intro .bk-lead { font-size: 1rem; }
  .bk-step-list, .bk-help-grid { grid-template-columns: minmax(0, 1fr); }
  .bk-parts-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-step-list li, .bk-help-grid article { padding-inline: 0; }
  .bk-step-list li + li, .bk-help-grid article + article { border-left: 0; border-top: 1px solid var(--bk-line); }
  .bk-parts-list li:nth-child(3) { padding-left: 0; border-left: 0; }
  .bk-parts-list li:nth-child(n+3) { border-top: 1px solid var(--bk-line); }
  .bk-parts-list li { padding-right: 12px; }
  .bk-footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 570px) {
  .bk-launch-copy .bk-actions { gap: .38rem .8rem; }
  .bk-launch-copy .bk-primary-action { min-height: 47px; padding-inline: .82rem; gap: .75rem; }
  .bk-launch-specs dd { font-size: .72rem; }
  .bk-fit-criteria { grid-template-columns: minmax(0, 1fr); }
  .bk-fit-criteria li { display: grid; grid-template-columns: 1.6rem minmax(0, 1fr); align-items: start; padding: .55rem 0; border-left: 0; border-top: 1px solid #bcd0c4; }
  .bk-fit-criteria h3 { margin: 0 0 .13rem; }
  .bk-product--focus .bk-product-grid { row-gap: 10px; }
  .bk-product--focus .bk-product-intro h1 { font-size: clamp(1.72rem, 7.35vw, 2.1rem); }
  .bk-product--focus .bk-gallery-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 5px; margin-top: .55rem; }
  .bk-product--focus .bk-gallery-tabs button { min-height: 44px; justify-content: center; gap: 4px; padding-inline: 4px; font-size: .77rem; }
  .bk-product--focus .bk-gallery-tabs button img { width: 24px; height: 23px; }
  .bk-order-box--preview { padding: .72rem .82rem; }
  .bk-fit-first .bk-fit-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-power-choices--devices { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-power-choices--devices label:last-child { grid-column: 1 / -1; }
  .bk-quick-nav { grid-template-columns: minmax(0, 1fr); gap: 5px; }
  .bk-quick-nav a { min-height: 58px; padding-block: .52rem; }
  .bk-hero--scene .bk-hero-copy .bk-lead { line-height: 1.5; }
  .bk-hero--scene .bk-hero-copy .bk-actions { gap: .45rem .85rem; margin-top: .85rem; }
  .bk-hero--scene .bk-hero-copy .bk-btn { min-height: 46px; gap: .65rem; padding-inline: .8rem; }
  .bk-hero--scene .bk-hero-copy .bk-hero-note { margin-top: .75rem; }
  .bk-energy-legend { grid-template-columns: minmax(0, 1fr); gap: 5px; }
  .bk-energy-legend li { gap: .55rem; padding: .42rem .55rem; }
  .bk-energy-note span { margin-left: 0; }
}
@media (max-width: 390px) {
  .bk-form-row { grid-template-columns: minmax(0, 1fr); gap: .7rem; }
  .bk-contact-topics { grid-template-columns: minmax(0, 1fr); }
  .bk-gallery-tabs { gap: 5px; }
  .bk-gallery-tabs button img { width: 33px; height: 29px; }
  .bk-gallery-tabs button { gap: 5px; padding-right: 6px; }
  .bk-spec-strip > div { padding-inline: 7px; }
  .bk-spec-strip dt { font-size: .66rem; }
  .bk-spec-strip dd { font-size: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  .bk-shell .bk-btn { transition: none; }
}
@media print {
  .bk-header, .bk-footer, .bk-skip, .bk-partner .bk-actions, .bk-partner + .bk-section + .bk-section { display: none !important; }
  body { background: white; color: black; font-size: 10pt; }
  .bk-shell { width: 100%; }
  .bk-page-section { padding-top: 0; }
  .bk-section { margin-top: 1.4rem; }
  .bk-editorial-head h1 { font-size: 28pt; }
  .bk-section-heading h2 { font-size: 20pt; }
  .bk-editorial-head figure, .bk-facts > div { break-inside: avoid; }
}

/* System photography: concept assets until the exact models are approved. */
.bk-system-views {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
  margin-top: clamp(20px, 3vw, 38px);
}
.bk-system-views article { min-width: 0; }
.bk-system-photo { position: relative; overflow: hidden; border-radius: var(--bk-radius); background: #ece7df; }
.bk-system-photo img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.bk-system-photo figcaption {
  padding: .5rem .7rem;
  background: var(--bk-card);
  color: var(--bk-muted);
  font-size: .7rem;
}
.bk-system-copy { padding: 1.2rem .15rem 0; }
.bk-system-index { color: var(--bk-link); font-size: .69rem; font-weight: 700; letter-spacing: .1em; }
.bk-system-copy h3 { margin-top: .45rem; font-size: clamp(1.35rem, 2.2vw, 2rem); }
.bk-system-copy p { max-width: 50ch; margin-top: .6rem; color: var(--bk-muted); font-size: .94rem; }
.bk-system-copy .bk-text-link { margin-top: .55rem; min-height: 44px; }
.bk-image-context { max-width: 105ch; margin-top: 1rem !important; color: var(--bk-muted); font-size: .75rem; }
.bk-options-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(24px, 5vw, 70px);
}
.bk-options-intro .bk-section-heading { max-width: none; }
.bk-options-intro h2 { font-size: clamp(2rem, 3.4vw, 3.5rem); }
.bk-storage-photo { position: relative; min-width: 0; }
.bk-storage-photo img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--bk-radius); }
.bk-storage-photo figcaption { padding-top: .5rem; }
.bk-storage-badge {
  position: absolute;
  inset: 12px auto auto 12px;
  max-width: calc(100% - 24px);
  padding: .4rem .65rem;
  border-radius: 5px;
  background: #fffef6f5;
  color: var(--bk-ink);
  font-size: .72rem;
  font-weight: 700;
  line-height: 1.4;
}
.bk-connection-photo { margin-top: 1.5rem !important; }
.bk-connection-photo img { width: 100%; max-height: 540px; aspect-ratio: 16 / 9; object-fit: cover; object-position: 50% 48%; border-radius: var(--bk-radius); }
.bk-connection-photo figcaption { max-width: 100ch; padding-top: .6rem; }
.bk-product--focus #galerie-set img { object-fit: contain; object-position: center; background: #eee8df; }
.bk-product--focus .bk-gallery-stage figcaption { position: static; max-width: none; padding: .5rem .1rem 0; background: none; color: var(--bk-muted); }
.bk-launch-specs dt { overflow-wrap: anywhere; hyphens: auto; }
@media (max-width: 760px) {
  .bk-system-views, .bk-options-intro { grid-template-columns: minmax(0, 1fr); }
  .bk-system-views { gap: 1.8rem; }
  .bk-system-copy { padding-top: .8rem; }
  .bk-options-intro { gap: 1.4rem; }
  .bk-storage-photo img, .bk-connection-photo img { aspect-ratio: 3 / 2; }
}
@media (max-width: 570px) {
  .bk-product--focus .bk-gallery-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Solar story: real horizontal movement, exact vector annotations, concept photos. */
.bk-sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.bk-solar-story { min-width: 0; align-self: stretch; overflow: hidden; background: var(--bk-card); border-left: 1px solid #e2e3d7; }
.bk-story-topline { min-height: 43px; padding: 0 17px; display: flex; align-items: center; justify-content: space-between; gap: 10px; border-bottom: 1px solid #e9e8de; }
.bk-story-topline p { display: flex; align-items: center; gap: 8px; font-size: .72rem; letter-spacing: .015em; font-weight: 700; }
.bk-story-sun { width: 9px; height: 9px; border-radius: 50%; background: #db5b2c; box-shadow: 0 0 0 4px #f7e7cf; }
.bk-story-play { display: flex; align-items: center; justify-content: center; gap: 5px; min-height: 43px; min-width: 69px; border: 0; padding: 0; background: transparent; font-size: .68rem !important; }
.bk-story-play svg { width: 12px; height: 12px; stroke: currentColor; stroke-width: 2; }
.bk-story-play .bk-story-play-icon { fill: currentColor; stroke: none; }
.bk-story-play[data-playing="true"] .bk-story-play-icon, .bk-story-play[data-playing="false"] .bk-story-pause-icon { display: none; }
.bk-story-viewport { overflow: hidden; touch-action: pan-y pinch-zoom; }
.bk-story-track { display: flex; align-items: stretch; transition: transform .56s cubic-bezier(.22,.61,.36,1); will-change: transform; }
.bk-story-slide { flex: 0 0 100%; min-width: 0; }
.bk-solar-story:not([data-enhanced]) .bk-story-slide:not(:first-child) { display: none; }
.bk-story-scene { position: relative; aspect-ratio: 3 / 2; overflow: hidden; isolation: isolate; background: #f3eee6; }
.bk-story-scene > img { width: 100%; height: 100%; object-fit: cover; }
.bk-story-scene--panels > img { object-position: 50% 54%; }
.bk-story-image-tag { position: absolute; top: 12px; left: 13px; max-width: calc(100% - 26px); padding: 5px 8px; background: #fffdf3f0; border: 1px solid #f1e9d7; border-radius: 5px; color: #30463c; font-size: .64rem; font-weight: 700; line-height: 1.3; }
.bk-story-route { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.bk-story-route path { stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; stroke-width: 2.5; }
.bk-story-route .bk-story-route-halo { stroke: #fffdf5e8; stroke-width: 6.5; }
.bk-story-route-dc { stroke: #cb572c; }
.bk-story-route-ac { stroke: #27594d; }
.bk-story-route-home { stroke: #27594d; stroke-dasharray: 5 6; }
.bk-story-route-grid { stroke: #5b7e94; stroke-dasharray: 4 6; }
.bk-story-pin { position: absolute; left: var(--pin-x); top: var(--pin-y); transform: translate(-50%,-50%); display: grid; place-items: center; width: clamp(25px, 2.65vw, 35px); height: clamp(25px, 2.65vw, 35px); border: 2px solid var(--bk-card); border-radius: 50%; background: #265b50; color: #fffefa; box-shadow: 0 2px 10px #17312b33; font-size: .77rem; font-weight: 700; }
.bk-story-pin:first-of-type { background: #c64b24; }
.bk-story-grid-label { position: absolute; right: 12px; top: 81%; display: flex; align-items: center; gap: 5px; white-space: nowrap; padding: 5px 7px; border: 1px solid #d2dfe5; border-radius: 5px; background: #f5fafdf5; color: #385b73; font-size: clamp(.55rem, .79vw, .68rem); font-weight: 700; line-height: 1.3; }
.bk-story-grid-label i, .bk-story-detail i { flex: none; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.bk-story-image-callout, .bk-story-conversion { position: absolute; bottom: 14px; left: 16px; right: 16px; padding: 12px 14px; display: flex; align-items: center; gap: 12px; border: 1px solid #f5f2e1; border-radius: 10px; background: #fffdf5f0; box-shadow: 0 5px 20px #302b1010; }
.bk-story-image-callout > span { color: #c65325; font-size: 1.8rem; line-height: 1; }
.bk-story-image-callout > svg { flex: 0 0 29px; width: 29px; height: 29px; stroke: #27594d; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.bk-story-image-callout strong { display: block; color: var(--bk-ink); font-size: .86rem; line-height: 1.3; }
.bk-story-image-callout small { display: block; margin-top: .25rem; color: var(--bk-muted); font-size: .7rem; line-height: 1.35; }
.bk-story-conversion { justify-content: center; gap: clamp(12px, 2vw, 28px); padding-block: 10px; }
.bk-story-conversion > span { color: var(--bk-link); font-size: 1.1rem; font-weight: 700; line-height: 1.15; }
.bk-story-conversion > span:first-child { color: #ae4b22; }
.bk-story-conversion small { display: block; margin-top: 4px; color: var(--bk-muted); font-size: .62rem; font-weight: 400; }
.bk-story-conversion svg { width: 36px; height: 36px; stroke: #27594d; stroke-width: 1.6; }
.bk-shell .bk-story-caption { min-height: 168px; padding: 16px 21px 15px; border-top: 1px solid #e4e7dc; color: var(--bk-muted); }
.bk-story-eyebrow { color: var(--bk-link); font-size: .62rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.bk-story-caption h2 { margin-top: .35rem; color: var(--bk-ink); font-size: clamp(1.18rem, 1.7vw, 1.65rem); line-height: 1.15; letter-spacing: -.045em; }
.bk-story-caption > p:last-of-type:not(.bk-story-eyebrow) { max-width: 66ch; margin-top: .5rem; font-size: .8rem; line-height: 1.5; }
.bk-story-path { display: flex; flex-wrap: wrap; align-items: center; gap: 5px 12px; padding: 0; margin-top: .55rem !important; list-style: none; }
.bk-story-path li { display: flex; align-items: center; gap: 4px; font-size: .68rem; color: var(--bk-ink); }
.bk-story-path b { display: grid; place-items: center; width: 17px; height: 17px; border-radius: 50%; color: var(--bk-link); background: #e7f0e8; font-size: .6rem; }
.bk-story-detail { display: flex; align-items: center; gap: 5px; width: fit-content; margin-top: .6rem; color: var(--bk-link) !important; font-size: .69rem; line-height: 1.4; }
.bk-dc-dot { color: #c64b24; }
a.bk-story-detail { min-height: 30px; text-underline-offset: .2em; }
.bk-story-controls { padding: 0 16px 6px; }
.bk-story-tabs { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 5px; padding-top: 10px; border-top: 1px solid var(--bk-line); }
.bk-story-tabs button { display: flex; align-items: center; justify-content: center; gap: 5px; min-height: 43px; padding: 5px 4px; border: 1px solid transparent; border-radius: 7px; color: var(--bk-muted); background: #f1f3ed; font-size: .67rem; line-height: 1.3; transition: background .2s, color .2s; }
.bk-story-tabs button > span { font-size: .6rem; font-weight: 700; }
.bk-story-tabs button[aria-pressed="true"] { border-color: #2e6254; background: #e5f0e7; color: #1b4b3d; font-weight: 700; }
.bk-story-tabs button:hover { background: #e9ede3; }
.bk-story-bottomline { display: flex; align-items: center; justify-content: space-between; gap: 8px; color: var(--bk-muted); font-size: .6rem; line-height: 1.3; }
.bk-story-bottomline > span:first-child { font-variant-numeric: tabular-nums; color: var(--bk-link); font-weight: 700; }
.bk-story-bottomline > div { display: flex; gap: 5px; }
.bk-story-bottomline button { display: grid; place-items: center; width: 40px; min-height: 40px; border: 0; background: transparent; font-size: 1.15rem; }
.bk-story-footnote { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 4px 15px; padding: 9px 1px 0; color: var(--bk-muted); font-size: .65rem; line-height: 1.5; }
.bk-story-footnote p { max-width: 86ch; }
.bk-story-footnote a { display: inline-flex; align-items: center; gap: 6px; min-height: 30px; color: var(--bk-link); font-weight: 700; text-underline-offset: .2em; }
.bk-action-label-short { display: none; }

/* Connection plan: component topology, never an instruction to wire mains. */
.bk-wiring-board { margin-top: 1.6rem !important; padding: clamp(18px, 3vw, 38px); border: 1px solid var(--bk-line); border-radius: 20px; background: linear-gradient(135deg,#fbf1dd,#f3f7ef 65%,#e9f1f3); }
.bk-wiring-board > figcaption { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: .4rem 1rem; }
.bk-wiring-board > figcaption strong { color: var(--bk-ink); font-size: 1rem; }
.bk-wiring-nodes { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 22px; margin-top: 1.4rem !important; padding: 0; list-style: none; }
.bk-wiring-nodes > li { position: relative; padding: 17px 12px; background: #fffef9f2; border: 1px solid #d3ded2; border-radius: 12px; }
.bk-wiring-nodes > li:not(:last-child)::after { content: "→"; position: absolute; top: 52px; right: -21px; width: 20px; text-align: center; color: #416456; font-size: 1.2rem; }
.bk-wiring-node-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.bk-wiring-node-head > span { color: var(--bk-link); font-size: .7rem; font-weight: 700; }
.bk-wiring-node-head svg { width: 48px; height: 48px; fill: none; stroke: #315f4c; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.bk-wiring-nodes strong { display: block; color: var(--bk-ink); font-size: .94rem; line-height: 1.3; letter-spacing: -.02em; }
.bk-wiring-nodes p { margin-top: .45rem; color: var(--bk-muted); font-size: .76rem; line-height: 1.5; }
.bk-wiring-nodes small { display: block; margin-top: .65rem; color: #94501e; font-size: .67rem; font-weight: 700; }
.bk-wiring-nodes > li:nth-child(n+2) small { color: var(--bk-link); }
.bk-grid-branch { display: grid; grid-template-columns: minmax(0,3fr) minmax(0,1fr); column-gap: 22px; }
.bk-grid-branch p { position: relative; grid-column: 2; padding: 15px 0 0; text-align: center; color: #365b70; font-size: .73rem; line-height: 1.5; }
.bk-grid-branch p::before { content: "↕"; display: block; font-size: 1.3rem; line-height: 1.3; }
.bk-grid-branch strong { display: block; }
.bk-grid-branch span { display: block; font-size: .64rem; }
.bk-wiring-note { margin-top: .75rem !important; color: var(--bk-muted); font-size: .72rem; line-height: 1.5; }
.bk-wire-steps { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 32px; margin-top: 1.4rem !important; padding: 0; list-style: none; counter-reset: wiring; }
.bk-wire-steps > li { counter-increment: wiring; display: grid; grid-template-columns: 27px minmax(0,1fr); gap: 10px; padding: 18px 0; border-top: 1px solid var(--bk-line); }
.bk-wire-steps > li::before { content: "0" counter(wiring); color: var(--bk-link); font-size: .71rem; font-weight: 700; padding-top: 3px; }
.bk-wire-steps h3 { font-size: 1.05rem; line-height: 1.25; letter-spacing: -.025em; }
.bk-wire-steps p { margin-top: .4rem; color: var(--bk-muted); font-size: .85rem; }
.bk-wire-sources { display: flex; flex-wrap: wrap; gap: .45rem 1.4rem; margin-top: .8rem; }
@media (min-width: 761px) and (max-width: 1050px) {
  .bk-launch-copy { padding-inline: 25px; }
  .bk-launch-copy h1 { font-size: 3rem; }
  .bk-story-tabs button { font-size: .62rem; gap: 3px; }
  .bk-shell .bk-story-caption { min-height: 190px; padding-inline: 16px; }
  .bk-story-caption h2 { font-size: 1.24rem; }
}
@media (max-width: 760px) {
  .bk-solar-story { border-left: 0; border-top: 1px solid #e2e3d7; }
  .bk-story-topline { padding-inline: 13px; }
  .bk-story-scene { aspect-ratio: 3 / 2; }
  .bk-shell .bk-story-caption { min-height: 177px; padding: 15px 16px 13px; }
  .bk-story-caption h2 { font-size: clamp(1.23rem, 4.8vw, 1.65rem); }
  .bk-story-caption > p:last-of-type:not(.bk-story-eyebrow) { font-size: .79rem; }
  .bk-story-controls { padding-inline: 12px; }
  .bk-story-tabs button { flex-direction: column; gap: 1px; padding-block: 5px; }
  .bk-story-tabs button > span { line-height: 1; }
  .bk-story-image-callout, .bk-story-conversion { left: 12px; right: 12px; bottom: 11px; padding: 9px 11px; gap: 10px; }
  .bk-story-image-callout strong { font-size: .75rem; }
  .bk-story-image-callout small { font-size: .61rem; }
  .bk-story-image-tag { top: 9px; left: 11px; font-size: .59rem; }
  .bk-story-pin { width: 26px; height: 26px; font-size: .67rem; }
  .bk-story-grid-label { padding: 3px 5px; font-size: .56rem; }
  .bk-wiring-nodes { grid-template-columns: minmax(0,1fr); gap: 22px; }
  .bk-wiring-nodes > li { display: grid; grid-template-columns: 68px minmax(0,1fr); align-items: center; padding: 13px; gap: 10px; }
  .bk-wiring-node-head { margin: 0; gap: 5px; }
  .bk-wiring-node-head svg { width: 43px; height: 43px; }
  .bk-wiring-nodes > li:not(:last-child)::after { content: "↓"; left: calc(50% - 10px); right: auto; top: auto; bottom: -23px; height: 22px; line-height: 22px; }
  .bk-grid-branch { grid-template-columns: minmax(0,1fr); }
  .bk-grid-branch p { grid-column: 1; }
  .bk-wire-steps { grid-template-columns: minmax(0,1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .bk-story-track, .bk-story-tabs button { transition: none; }
}
@media (max-width: 570px) {
  .bk-action-label-long { display: none; }
  .bk-action-label-short { display: inline; }
  .bk-launch-copy .bk-actions { gap: .35rem .6rem; }
}

/* The physical wall crossing: photographic context and a separate, precise cutaway. */
.bk-wall-heading { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,.8fr); align-items: end; gap: clamp(20px,5vw,75px); }
.bk-wall-heading h2 { margin-top: .6rem; }
.bk-wall-heading h2, .bk-wall-case > header h3, .bk-story-caption h2 { text-wrap: balance; }
.bk-wall-heading > p { max-width: 43ch; color: var(--bk-muted); font-size: clamp(1rem,1.3vw,1.16rem); line-height: 1.55; padding-bottom: .25rem; }
.bk-wall-cases { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: clamp(16px,2.4vw,32px); margin-top: 2rem; }
.bk-wall-case { --wall-color:#315f4b; --wall-wash:#e6f0e7; min-width: 0; overflow: hidden; display: flex; flex-direction: column; border: 1px solid #ccdacf; border-radius: 21px; background: var(--bk-card); }
.bk-wall-case--new { --wall-color:#8f521f; --wall-wash:#fbefdb; border-color:#dfd5bf; }
.bk-wall-case > header { display: grid; grid-template-columns: 38px minmax(0,1fr) 25px; align-items: center; gap: 13px; padding: clamp(17px,2.1vw,27px); background: var(--wall-wash); }
.bk-wall-case-letter { display: grid; place-items: center; height: 38px; width: 38px; border-radius: 50%; background: var(--wall-color); color: #fffdf5; font-size: .95rem; font-weight: 700; }
.bk-wall-case > header p { color: var(--wall-color); font-size: .68rem; font-weight: 700; line-height: 1.35; }
.bk-wall-case > header h3 { margin-top: .35rem; font-size: clamp(1.12rem,1.7vw,1.7rem); line-height: 1.15; letter-spacing: -.04em; }
.bk-wall-case > header > svg { width: 25px; height: 25px; stroke: var(--wall-color); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.bk-wall-photo { position: relative; overflow: hidden; isolation: isolate; aspect-ratio: 3 / 2; background: #eee6d8; }
.bk-wall-photo > img { display: block; width: 100%; height: 100%; object-fit: cover; }
.bk-wall-photo-side { position: absolute; z-index: 1; top: 13px; padding: 5px 9px; border-radius: 5px; background: #fffdf3ed; color: #304b40; font-size: .65rem; font-weight: 700; line-height: 1.3; box-shadow: 0 1px 9px #4034130a; }
.bk-wall-photo-side--outside { left: 14px; }
.bk-wall-photo-side--inside { right: 14px; }
.bk-wall-photo-route { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.bk-wall-photo-route > path { stroke: #273e32; stroke-width: 8; stroke-linecap: round; stroke-linejoin: round; }
.bk-wall-photo-route--new > path { stroke: #715136; }
.bk-wall-photo-route > .bk-wall-photo-route-halo { stroke: #faffefd9; stroke-width: 16; }
.bk-wall-photo-route circle { fill: #315f4b; stroke: #faffef; stroke-width: 5; }
.bk-wall-photo-route--new circle { fill: #a8692e; }
.bk-wall-photo-label { position: absolute; z-index: 1; left: 48%; top: 55%; max-width: 47%; padding: 6px 9px; border: 1px solid #bfd2c5; border-radius: 5px; background: #f5fbf0f5; color: #274e3d; font-size: clamp(.58rem,.9vw,.73rem); font-weight: 700; line-height: 1.4; box-shadow: 0 2px 12px #302b1010; }
.bk-wall-photo-label--new { left: 43%; color: #74451f; background: #fff5e6f5; border-color: #dcc8a5; }
.bk-wall-home-tag { position: absolute; left: 68%; top: 78%; display: inline-flex; align-items: center; gap: 4px; max-width: 30%; padding: 5px 7px; border: 1px solid #d4dfd1; border-radius: 5px; background: #f9fcf4f7; color: #315f4b; font-size: .65rem; font-weight: 700; line-height: 1.3; }
.bk-wall-home-tag--new { left: 64%; top: 87%; color: #805323; background: #fff8ebf7; border-color: #e3d1ad; }
.bk-wall-home-tag svg { flex: none; width: 14px; height: 14px; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.bk-wall-cut { padding: 6px clamp(12px,2vw,25px) 0; border-top: 1px solid #d7dfd0; background: #f8faf3; }
.bk-wall-case--new .bk-wall-cut { background: #fffbf1; border-color: #e6dbc3; }
.bk-wall-diagram { display: block; width: 100%; height: auto; font-family: var(--bk-font); }
.bk-wall-zone-label { fill: #50665b; font-size: 22px; font-weight: 400; }
.bk-wall-object-label { fill: #274635; font-size: 23px; font-weight: 700; }
.bk-wall-diagram-key { fill: #315f4b; font-size: 23px; font-weight: 700; }
.bk-wall-housewire { stroke: #416c51; }
.bk-wall-diagram--new .bk-wall-housewire { stroke: #a46d31; }
.bk-wall-diagram--new .bk-wall-diagram-key { fill: #8f521f; }
.bk-wall-case figure > figcaption { padding: 17px clamp(17px,2.1vw,27px) 10px; font-size: .9rem; line-height: 1.55; color: var(--bk-muted); }
.bk-wall-case > footer { display: flex; flex-direction: column; align-items: start; margin-top: auto; gap: .55rem; padding: 8px clamp(17px,2.1vw,27px) 16px; }
.bk-wall-case > footer p { display: flex; align-items: baseline; gap: 7px; color: var(--wall-color); font-size: .77rem; line-height: 1.5; }
.bk-wall-case > footer p > span { flex: none; font-weight: 700; }
.bk-wall-case > footer a { min-height: 44px; color: var(--wall-color); font-size: .8rem; }
.bk-wall-note { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: .5rem 1.4rem; margin-top: 1rem; color: var(--bk-muted); font-size: .68rem; line-height: 1.55; }
.bk-wall-note > p { max-width: 112ch; }
.bk-wall-note a { display: inline-flex; align-items: center; min-height: 30px; gap: 5px; color: var(--bk-link); text-underline-offset: .2em; }
.bk-story-slide--wall .bk-wall-photo-label { font-size: clamp(.6rem,.95vw,.77rem); }
.bk-story-slide--wall .bk-wall-photo-side { font-size: .67rem; }
.bk-story-tabs button { font-size: .74rem; }
.bk-story-tabs button > span { display: grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; background: #e1e8dc; color: #335847; font-size: .64rem; }
.bk-story-tabs button[aria-pressed="true"] > span { background: #315f4b; color: #fffdf5; }
.bk-story-tabs button[aria-pressed="true"][data-story-index="1"] { border-color:#a46d31; background:#fbefdb; color:#74451f; }
.bk-story-tabs button[aria-pressed="true"][data-story-index="1"] > span { background:#8f521f; }
@media (max-width: 760px) {
  .bk-wall-heading { grid-template-columns: minmax(0,1fr); gap: 16px; }
  .bk-wall-heading h2 { font-size: clamp(1.9rem,7.2vw,3rem); }
  .bk-wall-heading > p { max-width: 42ch; font-size: 1rem; }
  .bk-wall-cases { grid-template-columns: minmax(0,1fr); gap: 23px; margin-top: 1.3rem; }
  .bk-wall-case > header { grid-template-columns: 33px minmax(0,1fr) 21px; gap: 10px; }
  .bk-wall-case-letter { width: 33px; height: 33px; font-size: .83rem; }
  .bk-wall-case > header h3 { font-size: clamp(1.1rem,4.6vw,1.45rem); }
  .bk-wall-case figure > figcaption { font-size: .86rem; }
  .bk-wall-photo-side, .bk-story-slide--wall .bk-wall-photo-side { top: 9px; padding: 4px 7px; font-size: .61rem; }
  .bk-wall-photo-side--outside { left: 10px; }
  .bk-wall-photo-side--inside { right: 10px; }
  .bk-wall-photo-label, .bk-story-slide--wall .bk-wall-photo-label { padding: 4px 5px; font-size: .59rem; }
  .bk-wall-home-tag { padding: 4px; font-size: .57rem; gap: 3px; }
  .bk-wall-home-tag svg { width: 11px; height: 11px; }
  .bk-wall-cut { padding: 6px 10px 0; }
  .bk-wall-zone-label { font-size: 28px; }
  .bk-wall-object-label, .bk-wall-diagram-key { font-size: 30px; }
  .bk-story-tabs button { min-height: 48px; gap: 3px; font-size: .68rem; }
  .bk-story-bottomline > span:nth-child(2) { max-width: 21ch; }
}
@media (max-width: 360px) {
  .bk-launch-copy .bk-primary-action { padding-inline: .65rem; font-size: .78rem; gap: .6rem; }
  .bk-launch-copy .bk-text-link { font-size: .78rem; gap: .45rem; }
  .bk-wall-case > header { grid-template-columns: 30px minmax(0,1fr); }
  .bk-wall-case > header > svg { display: none; }
  .bk-wall-case-letter { width: 30px; height: 30px; }
}

/* Reviewed connection guide: photo context and deterministic diagrams stay distinct. */
.bk-story-energy-strip { position: absolute; inset: auto 14px 14px; display:flex; justify-content:center; align-items:center; gap:10px; flex-wrap:wrap; padding:12px 10px; border:1px solid #e0e7dc; border-radius:10px; background:#fffef8f5; color:var(--bk-ink); box-shadow:0 5px 20px #17312b12; font-size:clamp(.75rem,1.15vw,1rem); font-weight:700; }
.bk-story-energy-strip i { font-style:normal; color:#39745a; }
.bk-story-energy-strip small { flex:0 0 100%; text-align:center; font-size:.65rem; font-weight:400; color:var(--bk-muted); }
.bk-story-energy-strip--reserve { background:#fff8eaf5; border-color:#eadbc2; }
.bk-manual-intro { padding-bottom:0; }
.bk-manual-intro h1 { max-width:19ch; margin-top:20px; }
.bk-manual-intro .bk-lead { max-width:62ch; margin-top:22px; }
.bk-manual-scope { margin-top:32px; padding:20px 23px; border:1px solid var(--bk-line); border-radius:var(--bk-radius); background:var(--bk-wash); max-width:83ch; }
.bk-manual-scope p { margin-top:5px; color:var(--bk-muted); font-size:.9rem; }
.bk-manual-nav { display:flex; gap:8px; flex-wrap:wrap; margin-top:26px; }
.bk-manual-nav a { padding:9px 13px; border:1px solid var(--bk-line); border-radius:100px; background:var(--bk-card); font-size:.8rem; text-decoration:none; }
.bk-manual-nav a:hover { background:var(--bk-mint); }
.bk-manual-comparison { overflow-x:auto; margin-top:28px; border:1px solid var(--bk-line); border-radius:var(--bk-radius); background:var(--bk-card); }
.bk-manual-comparison table { width:100%; min-width:560px; border-collapse:collapse; text-align:left; font-size:.9rem; }
.bk-manual-comparison th,.bk-manual-comparison td { padding:20px; vertical-align:top; border-bottom:1px solid var(--bk-line); }
.bk-manual-comparison thead { background:var(--bk-mint); }
.bk-manual-comparison th { font-weight:700; }
.bk-manual-comparison tbody th { width:30%; }
.bk-manual-comparison small { display:block; margin-top:5px; font-weight:400; color:var(--bk-muted); }
.bk-manual-comparison tbody tr:last-child > * { border-bottom:0; }
.bk-manual-comparison + .bk-fine { margin-top:15px; }
.bk-manual-feature { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.1fr); gap:clamp(28px,5vw,70px); align-items:center; }
.bk-manual-feature h2 { margin-block:13px 22px; }
.bk-manual-feature > div > p:not(.bk-kicker) { color:var(--bk-muted); }
.bk-manual-photo { border:1px solid var(--bk-line); border-radius:var(--bk-radius); overflow:hidden; background:var(--bk-card); }
.bk-manual-photo img { width:100%; height:auto; }
.bk-manual-photo figcaption { padding:10px 14px; font-size:.7rem; color:var(--bk-muted); }
.bk-manual-steps { list-style:none; counter-reset:manual; padding:0; margin-top:25px !important; }
.bk-manual-steps li { position:relative; padding:0 0 20px 43px; counter-increment:manual; }
.bk-manual-steps li::before { content:counter(manual); position:absolute; left:0; top:0; width:29px; height:29px; display:grid; place-items:center; color:var(--bk-link); background:var(--bk-mint); border:1px solid var(--bk-line); border-radius:50%; font-size:.8rem; font-weight:700; }
.bk-manual-steps b,.bk-manual-steps span { display:block; }
.bk-manual-steps span { color:var(--bk-muted); font-size:.88rem; margin-top:3px; }
.bk-manual-diagram { margin-top:30px !important; max-width:970px; margin-inline:auto !important; border:1px solid var(--bk-line); border-radius:var(--bk-radius); overflow:hidden; background:var(--bk-card); }
.bk-manual-diagram a { display:block; }
.bk-manual-diagram img { width:100%; height:auto; }
.bk-manual-diagram figcaption { padding:11px 18px; font-size:.74rem; color:var(--bk-muted); border-top:1px solid var(--bk-line); }
.bk-manual-callout { margin-block:25px 0; padding:19px 22px; border-left:3px solid #bc7443; border-radius:0 9px 9px 0; background:#fcf0dc; }
.bk-manual-callout p { margin-top:5px; color:var(--bk-muted); font-size:.88rem; }
.bk-manual-bullets { padding-left:20px; margin-top:20px !important; color:var(--bk-muted); }
.bk-manual-bullets li + li { margin-top:10px; }
.bk-manual-pair { display:grid; grid-template-columns:1fr 1fr; gap:26px; margin-top:30px; }
.bk-manual-pair article { padding:26px; border:1px solid var(--bk-line); border-radius:var(--bk-radius); background:var(--bk-card); }
.bk-manual-pair h3 { font-size:1.35rem; }
.bk-manual-pair p { margin-top:14px; color:var(--bk-muted); font-size:.9rem; }
.bk-manual-checklist { counter-reset:check; list-style:none; margin-top:25px !important; padding:0; }
.bk-manual-checklist li { counter-increment:check; position:relative; padding:22px 20px 22px 65px; border-top:1px solid var(--bk-line); }
.bk-manual-checklist li::before { content:counter(check,decimal-leading-zero); position:absolute; left:10px; top:20px; color:var(--bk-link); font-size:1.15rem; font-weight:700; }
.bk-manual-checklist strong,.bk-manual-checklist span { display:block; }
.bk-manual-checklist span { margin-top:5px; color:var(--bk-muted); max-width:85ch; font-size:.92rem; }
.bk-manual-sources ol { padding-left:24px; margin-top:25px !important; }
.bk-manual-sources li { padding:13px 0; border-bottom:1px solid var(--bk-line); }
.bk-manual-sources li a { font-weight:700; font-size:.9rem; }
.bk-manual-sources li span { display:block; margin-top:5px; color:var(--bk-muted); font-size:.82rem; }
.bk-manual-sources .bk-fine { margin-top:24px; }
.bk-manual-link-band { padding:32px; display:flex; align-items:center; justify-content:space-between; gap:25px; border-radius:var(--bk-radius); border:1px solid var(--bk-line); background:var(--bk-mint); }
.bk-manual-link-band h2 { margin-block:10px; font-size:clamp(1.6rem,3vw,2.5rem); }
@media(max-width:760px) {
  .bk-manual-feature,.bk-manual-pair { grid-template-columns:minmax(0,1fr); }
  .bk-manual-feature { gap:25px; }
  .bk-manual-photo { max-width:100%; }
  .bk-manual-intro h1 { font-size:clamp(2.3rem,9.5vw,4rem); }
  .bk-manual-nav { gap:6px; }
  .bk-manual-nav a { font-size:.72rem; padding:8px 11px; }
  .bk-manual-scope { padding:18px; }
  .bk-manual-comparison th,.bk-manual-comparison td { padding:15px; }
  .bk-manual-diagram figcaption { padding:10px 13px; font-size:.68rem; }
  .bk-manual-callout { padding:17px; }
  .bk-manual-link-band { padding:24px; align-items:flex-start; flex-direction:column; }
  .bk-story-tabs button { font-size:.62rem; padding-inline:2px; }
  .bk-story-energy-strip { inset:auto 10px 10px; gap:8px; padding:10px 8px; }
  .bk-story-energy-strip small { font-size:.6rem; }
}

/* One measured reference system. Every close-up uses the same master pixels. */
.bk-fixed-system .bk-same-system { display:block; width:100%; height:100%; }
.bk-fixed-system { background:#eee9df; }
.bk-system-markers { position:absolute; inset:0; width:100%; height:100%; pointer-events:none; }
.bk-system-markers circle { fill:#285e4f; stroke:#fffdf7; stroke-width:5; }
.bk-system-markers text { fill:#fffdf7; text-anchor:middle; font:700 28px system-ui,sans-serif; }
.bk-launch-scale { max-width:30ch; margin-top:1.6rem; color:var(--bk-muted); font-size:.85rem; line-height:1.5; }
.bk-compact-dimensions { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; margin-top:.7rem; }
.bk-compact-dimensions div { border-top:1px solid var(--bk-line); padding-top:.5rem; }
.bk-compact-dimensions dt { font-size:.63rem; color:var(--bk-muted); }
.bk-compact-dimensions dd { margin:.15rem 0 0; font-size:.68rem; color:var(--bk-ink); font-weight:700; }
.bk-shell .bk-story-caption { min-height:205px; }
.bk-story-footnote { padding-top:12px; }
.bk-wall-inset { position:absolute; left:12px; right:12px; bottom:12px; max-width:370px; margin-left:auto; filter:drop-shadow(0 3px 12px #193e2d1a); }
.bk-wall-inset svg { display:block; width:100%; height:auto; }
.bk-wall-inset text { font:600 12px system-ui,sans-serif; fill:#264e3e; }
.bk-size-table { width:100%; border-collapse:collapse; margin-top:1rem; font-size:.9rem; }
.bk-size-table th, .bk-size-table td { text-align:left; vertical-align:top; border-bottom:1px solid var(--bk-line); padding:.8rem .55rem; }
.bk-size-table th { color:var(--bk-link); }
.bk-size-table-wrap { overflow:auto; }
.bk-measured-photo { margin-top:1.25rem; }
.bk-measured-photo .bk-same-system { width:100%; height:auto; display:block; aspect-ratio:3/2; border-radius:18px; }
.bk-measured-photo figcaption { margin-top:.55rem; color:var(--bk-muted); font-size:.75rem; }
.bk-product .bk-same-system { width:100%; display:block; aspect-ratio:3/2; background:#eee9df; }
.bk-gallery-dialog .bk-same-system { display:block; max-height:80vh; width:min(1200px,85vw); }
@media (max-width:760px) {
  .bk-shell .bk-story-caption { min-height:216px; }
  .bk-launch-scale { margin-top:1rem; max-width:40ch; font-size:.78rem; }
  .bk-wall-inset { max-width:78%; bottom:9px; right:9px; left:auto; }
  .bk-compact-dimensions { gap:6px; }
  .bk-compact-dimensions dd { font-size:.61rem; }
  .bk-size-table { font-size:.78rem; }
  .bk-size-table th, .bk-size-table td { padding:.6rem .35rem; }
}

.bk-gallery-tabs .bk-same-system { flex:none; width:46px; height:31px; aspect-ratio:3/2; border-radius:4px; }

@media (max-width:760px) { .bk-launch-scale { display:none; } }