:root{
  /* v5 «прилад»: warm bone paper, sheet containers, tiles with hairline edges */
  --paper:#E3E1DA;--sheet:#F6F5F1;--tile:#ECEAE4;--ink:#151512;--mute:#66655D;--line:#D8D5CC;--line-2:#C4C1B7;--edge:rgba(21,21,18,.07);
  --signal:#FF4F12;--night:#0F1113;--night-2:#181B1E;--night-3:#22262A;--night-ink:#ECEBE6;--night-mute:#9FA29B;--night-line:rgba(236,235,230,.1);--night-edge:rgba(236,235,230,.06);--warm:#FFB37A;
  --sans:"Commissioner",system-ui,-apple-system,sans-serif;
  --s8:8px;--s16:16px;--s24:24px;--s32:32px;--s40:40px;--s48:48px;
  --r-s:6px;--r-m:10px;--r-l:16px;
  --frame:8px;--gap:8px;--pad:clamp(24px,3.2vw,48px);
  --gutter:clamp(16px,3vw,48px);--margin:calc(var(--gutter) - var(--frame));--col-gap:16px;--nav-h:52px;--section:clamp(80px,9vw,128px);
  --ease-enter:cubic-bezier(.22,1,.36,1);--ease-exit:cubic-bezier(.64,0,.78,0);--ease-move:cubic-bezier(.65,0,.35,1);
  --t-enter:600ms;--t-exit:300ms;--t-move:450ms;
}
@media (min-width:900px){:root{--col-gap:24px}}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + var(--s16) * 2)}
body{font-family:var(--sans);font-size:16px;line-height:1.5;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::focus-visible{outline:2px solid currentColor;outline-offset:2px}
svg{width:16px;height:16px;flex:none}

/* ---------- type ---------- */
h1,h2,h3{font-weight:500;text-wrap:balance}
.display{font-size:clamp(48px,7.2vw,108px);line-height:.96;letter-spacing:-.04em;font-weight:500}
.h2{font-size:clamp(32px,3.8vw,52px);line-height:1.04;letter-spacing:-.03em}
.h3{font-size:clamp(24px,2.2vw,32px);line-height:1.1;letter-spacing:-.025em}
.h4{font-size:18px;line-height:1.3;letter-spacing:-.015em;font-weight:500}
.lead{font-size:clamp(17px,1.3vw,19px);line-height:1.45}
.small{font-size:14px;line-height:1.45}
.mute{color:var(--mute)}
.eyebrow{font-weight:500;font-size:11px;line-height:1.4;letter-spacing:.08em;text-transform:uppercase}
.eyebrow .idx{display:inline-block;margin-right:12px;color:var(--signal)}
.data{font-variant-numeric:tabular-nums;font-weight:400}

/* ---------- containers ---------- */
.box{background:var(--sheet);border-radius:var(--r-l)}
.tile{background:var(--tile);border-radius:var(--r-m);box-shadow:inset 0 0 0 1px var(--edge)}
.panel-dark{background:var(--night);color:var(--night-ink);border-radius:var(--r-l)}

/* ---------- controls ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--s8);height:48px;padding:0 20px;border-radius:var(--r-s);border:1px solid transparent;font-weight:500;font-size:15px;line-height:1;white-space:nowrap;transition:background var(--t-move) var(--ease-move),color var(--t-move) var(--ease-move),border-color var(--t-move) var(--ease-move)}
.btn.light{background:var(--sheet);color:var(--ink)}
.btn.light:hover{background:var(--signal)}
.btn.ink{background:var(--ink);color:var(--sheet)}
.btn.ink:hover{background:var(--signal);color:var(--ink)}
.btn.ink.added{background:var(--tile);color:var(--ink);border-color:var(--line-2)}
.btn.line{border-color:var(--line-2)}
.btn.line:hover{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.btn.ghost{background:var(--tile);color:var(--ink)}
.btn.ghost:hover{background:var(--line)}
.btn.wide{width:100%}
.btn:disabled{opacity:.4;cursor:default}
.link{display:inline-flex;align-items:center;gap:var(--s8);height:48px;font-weight:500;font-size:15px;transition:color var(--t-move) var(--ease-move)}
.link:hover{color:var(--signal)}
.field{width:100%;height:48px;padding:0 16px;border:1px solid var(--edge);border-radius:var(--r-s);background:var(--tile);color:var(--ink);font:inherit;transition:border-color var(--t-move) var(--ease-move),background var(--t-move) var(--ease-move)}
.field::placeholder{color:var(--mute)}
.field:focus{outline:0;border-color:var(--ink);background:var(--sheet)}
textarea.field{height:auto;min-height:112px;padding:12px 16px;resize:vertical}
select.field{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23151512' stroke-width='1.6'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;background-size:16px}
.label{display:grid;gap:var(--s8)}
.label>span{font-size:14px;font-weight:500;color:var(--mute)}
.check{display:flex;gap:var(--s8);align-items:flex-start;font-size:14px;color:var(--mute);cursor:pointer}
.check input{appearance:none;flex:none;width:16px;height:16px;border:1px solid var(--ink);border-radius:4px;background:var(--sheet);margin-top:3px;cursor:pointer;transition:background var(--t-move) var(--ease-move)}
.check input:checked{background:var(--ink)}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 8px;border-radius:4px;background:var(--tile);box-shadow:inset 0 0 0 1px var(--edge);font-size:12px;color:var(--mute);white-space:nowrap}

/* battery segments: the one recurring motif (hero readout, calculator, footer) */
.segs{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:3px;height:8px}
.segs i{display:block;border-radius:1.5px;background:currentColor;opacity:.18;transition:opacity var(--t-move) var(--ease-move),background var(--t-move) var(--ease-move)}
.segs i.on{opacity:1;background:var(--warm)}
.segs.over i.on{background:var(--signal)}

/* ---------- layout ---------- */
main{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--gap);padding:var(--frame)}
/* one 12-column grid for every section: titles, panels, metrics and the calculator share the same column lines */
.kits,.sec,.calc-sec{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--col-gap);padding-inline:var(--margin)}
.kits>*,.sec>*,.calc-sec>*{grid-column:1/-1;min-width:0}
.sec{padding-top:var(--section)}
/* section head: title on cols 1–8, lead on 9–12 */
.sec-head{display:grid;gap:var(--s16);padding-bottom:var(--s40)}
.sec-head .t{display:grid;gap:12px}
.sec-head .lead{color:var(--mute);max-width:44ch}
@media (min-width:900px){.sec-head{grid-template-columns:subgrid;column-gap:var(--col-gap);row-gap:var(--s24);align-items:end}.sec-head .t{grid-column:1/9}.sec-head .lead{grid-column:9/13}}
.tbl{display:grid}
.tbl .cap{padding:0 0 var(--s8);color:var(--mute);font-size:11px;font-weight:500;letter-spacing:.08em;text-transform:uppercase}
.tbl>div:not(.cap){display:grid;grid-template-columns:1fr auto;gap:var(--s16);align-items:baseline;padding:10px 0;border-top:1px solid var(--line)}
.tbl .k{color:var(--mute);font-size:15px}
.tbl .v{font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap;font-size:14px}
@media (max-width:599px){.tbl .v{white-space:normal}}
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity var(--t-enter) var(--ease-enter),transform var(--t-enter) var(--ease-enter)}
[data-reveal].in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){[data-reveal]{opacity:1;transform:none;transition:none}}

/* ---------- nav: three islands on the grid edges ---------- */
.nav{position:fixed;top:var(--s16);left:var(--gutter);right:var(--gutter);height:var(--nav-h);z-index:100;display:flex;align-items:center;justify-content:space-between;gap:var(--s8);color:var(--night-ink);pointer-events:none;transition:color var(--t-move) var(--ease-move)}
.nav>*{pointer-events:auto}
.isl{display:flex;align-items:center;height:var(--nav-h);padding:0 6px;border-radius:var(--r-m);background:rgba(15,17,19,.38);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:inset 0 0 0 1px rgba(236,235,230,.1);transition:background var(--t-move) var(--ease-move),box-shadow var(--t-move) var(--ease-move)}
.nav.solid{color:var(--ink)}
.nav.solid .isl{background:color-mix(in srgb,var(--sheet) 88%,transparent);box-shadow:inset 0 0 0 1px var(--line)}
.logo{font-weight:600;font-size:15px;letter-spacing:-.02em;display:flex;align-items:center;gap:10px;white-space:nowrap;padding:0 14px 0 12px}
.logo i{width:9px;height:9px;border-radius:2.5px;background:var(--signal);display:inline-block}
.nav-links{display:flex;gap:2px;font-size:14px;font-weight:500}
.nav-links a{display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:var(--r-s);opacity:.8;transition:opacity var(--t-move) var(--ease-move),background var(--t-move) var(--ease-move)}
.nav-links a:hover{opacity:1;background:rgba(236,235,230,.1)}
.nav.solid .nav-links a:hover{background:var(--tile)}
.nav-right{display:flex;align-items:center;gap:2px;font-size:14px;font-weight:500}
.nav-right .phone{display:inline-flex;align-items:center;height:40px;padding:0 14px;font-size:13px}
.pill{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:var(--r-s);background:rgba(236,235,230,.12);transition:background var(--t-move) var(--ease-move),color var(--t-move) var(--ease-move)}
.nav.solid .pill{background:var(--tile)}
.pill:hover,.pill.on,.nav.solid .pill.on{background:var(--signal);color:var(--ink)}
@media (max-width:899px){.isl.mid,.nav-right .phone{display:none}}

/* ---------- hero: full-bleed photo, content on the grid ---------- */
.hero{position:relative;min-height:100svh;margin:calc(var(--frame) * -1) calc(var(--frame) * -1) 0;color:var(--night-ink);background:var(--night);display:grid;grid-template-rows:1fr;overflow:hidden;isolation:isolate}
.hero-media{position:absolute;inset:0;z-index:-1}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:70% 50%;transform:scale(1.06);transition:transform 2400ms var(--ease-enter)}
.hero.in .hero-media img{transform:scale(1)}
.hero-media::after{content:"";position:absolute;inset:0;background:
  linear-gradient(90deg,rgba(15,17,19,.74) 0%,rgba(15,17,19,.4) 38%,rgba(15,17,19,0) 68%),
  linear-gradient(0deg,rgba(15,17,19,.82) 0%,rgba(15,17,19,.34) 36%,rgba(15,17,19,0) 62%)}
.hero-grid{display:grid;gap:var(--s40);align-self:end;padding:calc(var(--nav-h) + var(--s16) + var(--s48)) var(--gutter) clamp(40px,6vw,88px);width:100%}
@media (min-width:900px){.hero-grid{grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--col-gap);align-items:end}.hero-title{grid-column:1/9}.hero-copy{grid-column:9/13}}
.hero-title{display:grid;gap:var(--s24)}
.hero-title .eyebrow{color:var(--night-mute)}
.hero-copy{display:grid;gap:var(--s24);max-width:46ch}
.hero-copy .lead{opacity:.9}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s16)}
.display .ln{display:block;overflow:hidden}
.display .ln span{display:block;transform:translateY(110%);transition:transform 900ms var(--ease-enter)}
.hero.in .display .ln:nth-child(1) span{transform:none;transition-delay:120ms}
.hero.in .display .ln:nth-child(2) span{transform:none;transition-delay:260ms}
.hero .fade{opacity:0;transform:translateY(12px);transition:opacity var(--t-enter) var(--ease-enter),transform var(--t-enter) var(--ease-enter)}
.hero.in .fade{opacity:1;transform:none}
.hero.in .fade.d1{transition-delay:420ms}.hero.in .fade.d2{transition-delay:560ms}.hero.in .fade.d3{transition-delay:700ms}
@media (prefers-reduced-motion:reduce){.hero-media img{transition:none;transform:none}.display .ln span{transition:none;transform:none}.hero .fade{transition:none;opacity:1;transform:none}}


/* ---------- kits: sheet card on the grid — body cols 1–7, photo cols 8–12 in a grey studio tile (white kit parts no longer melt into the sheet) ---------- */
.kits{padding-top:var(--section)}
.kits .sec-head .t{justify-items:center;text-align:center}
.kits .sec-head .h2{font-size:clamp(40px,5.4vw,84px);line-height:1;letter-spacing:-.04em}
@media (min-width:900px){.kits .sec-head .t{grid-column:1/-1}}
.kit-list{display:grid;gap:var(--s40)}
.kit{display:grid;grid-template-columns:minmax(0,1fr);background:var(--sheet);border-radius:var(--r-l)}
@media (min-width:900px){.kit-list,.kit{grid-template-columns:subgrid;column-gap:var(--col-gap)}.kit{grid-column:1/-1}.kit-photo{grid-column:8/13;grid-row:1}.kit-body{grid-column:1/8;grid-row:1}}
/* studio tile: soft light falloff from the top centre, product grounded by its own alpha shadow */
.kit-photo{position:relative;display:grid;place-items:center;aspect-ratio:4/3;margin:var(--s8) var(--s8) 0;border-radius:var(--r-m);background:radial-gradient(110% 85% at 50% 30%,#ECEAE5 0%,#DEDBD3 52%,#D2CFC6 100%);overflow:hidden}
@media (min-width:900px){.kit-photo{aspect-ratio:auto;min-height:clamp(480px,66svh,640px);margin:var(--s8) var(--s8) var(--s8) 0}}
.kit-photo img{width:auto;max-width:76%;max-height:min(420px,48svh);object-fit:contain;filter:drop-shadow(0 22px 18px rgba(21,21,18,.16)) drop-shadow(0 4px 4px rgba(21,21,18,.12));transform:translateY(3%) scale(1.04);transition:transform 1400ms var(--ease-enter)}
.kit.in .kit-photo img{transform:translateY(3%) scale(1)}
@media (max-width:899px){.kit-photo img{max-width:62%;max-height:none}}
@media (hover:hover){.kit.in:hover .kit-photo img{transform:translateY(2%) scale(1.03);transition-duration:var(--t-move)}}
/* body: top group — status + name, key numbers, runtime chips; price row at the bottom of the card */
.kit-body{min-width:0;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto auto 1fr;row-gap:var(--s32);padding:var(--s24) var(--s16) var(--s16)}
.kit-body>*{grid-column:1/-1;min-width:0}
@media (min-width:900px){.kit-body{padding:var(--s32) 0 var(--s24) var(--s32)}}
.kit-head{display:grid;gap:12px;justify-items:start}
.kit-tag{font-size:14px;font-weight:500;line-height:1.2;color:var(--signal)}
.kit-title{font-size:clamp(36px,3.8vw,60px);line-height:1;letter-spacing:-.035em}
/* key numbers: mini-title + small label/value pairs in one row (2×2 on phones), no rules */
.specs{display:grid;gap:12px}
.specs>.eyebrow{color:var(--mute)}
.spec-list{display:grid;grid-template-columns:repeat(2,max-content);gap:var(--s16) var(--s40)}
@media (min-width:600px){.spec-list{grid-template-columns:repeat(4,max-content)}}
.spec-list>div{display:grid;gap:2px}
.spec-list .k{font-size:13px;color:var(--mute)}
.spec-list .v{font-size:16px;font-weight:500;font-variant-numeric:tabular-nums}
/* runtime: label on its own line, chips under it */
.runs{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s8)}
.runs .eyebrow{flex-basis:100%;color:var(--mute);margin-bottom:4px}
.kit-foot{align-self:end}
.run{display:inline-flex;align-items:center;gap:var(--s8);height:32px;padding:0 12px;background:var(--tile);box-shadow:inset 0 0 0 1px var(--edge);border-radius:var(--r-s);font-size:14px}
.run b{font-weight:400;font-variant-numeric:tabular-nums}
.kit-foot{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:var(--s16)}
.kit-foot .price{display:grid;gap:var(--s8)}
.kit-foot .price .eyebrow{color:var(--mute)}
.kit-foot .price .data{font-weight:500;font-size:clamp(28px,2.6vw,38px);line-height:1;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.kit-actions{display:flex;flex-wrap:wrap;gap:var(--s8);align-items:center}
@media (max-width:599px){.kit-actions{width:100%}.kit-actions .btn{flex:1 1 0}}

/* ---------- calculator: fits one screen, two columns on paper — title + controls on the left, the scene in a dark container on the right ---------- */
.calc-sec{min-height:calc(100svh - var(--frame) * 2);align-content:center;padding-block:calc(var(--nav-h) + var(--s16) + var(--s16)) var(--s16);margin-top:var(--section);scroll-margin-top:var(--frame)}
.calc-sec .eyebrow{color:var(--mute)}
.calc{display:grid;gap:var(--s24)}
@media (min-width:900px){
  .calc{grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--col-gap);min-height:calc(100svh - var(--frame) * 2 - var(--nav-h) - var(--s16) * 3)}
  .calc-card{grid-column:1/6}
  .scene-box{grid-column:6/13}
}
@media (min-width:1200px){.calc-card{grid-column:1/5}.scene-box{grid-column:5/13}}
/* the scene sits centred in its own night container, which spans the full column height */
.scene-box{display:grid;place-items:center;padding:var(--s24);background:var(--night);border-radius:var(--r-l);overflow:hidden}
.scene{position:relative;width:100%;aspect-ratio:1600/1000}
.scene img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.scene img.on{mix-blend-mode:screen;opacity:0;transition:opacity var(--t-enter) var(--ease-enter)}
.scene img.on.is-on{opacity:1}
/* desktop: the box height comes from the left column, the render (with its own dark margins) grows to fill it */
@media (min-width:900px){.scene-box{container-type:size;padding:0}.scene{width:min(108cqw,118cqh * 1.6)}}
/* left column: title on top, groups with equal rhythm, the button closes the column */
.calc-card{display:flex;flex-direction:column;gap:var(--s16);min-width:0}
.calc-head{display:grid;gap:12px;padding-bottom:4px}
@media (min-width:900px){.calc-card .total{margin-top:auto}}
.calc-card .btn{width:100%}
.calc-group{display:grid;gap:var(--s8)}
/* appliances = quiet two-column tiles, a dot lights up when on */
.apps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}
.app{display:flex;align-items:center;gap:8px;height:clamp(32px,4.4svh,40px);padding:0 10px;min-width:0;background:var(--sheet);border-radius:var(--r-s);cursor:pointer;user-select:none;font-size:13px;transition:background var(--t-move) var(--ease-move),box-shadow var(--t-move) var(--ease-move)}
.app span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.app:hover{background:var(--tile)}
.app:has(input:checked){box-shadow:inset 0 0 0 1px var(--ink)}
.app input{appearance:none;flex:none;width:8px;height:8px;margin:0;border-radius:50%;box-shadow:inset 0 0 0 1px var(--mute);cursor:pointer;transition:background var(--t-move) var(--ease-move),box-shadow var(--t-move) var(--ease-move)}
.app input:checked{background:var(--signal);box-shadow:none}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;background:var(--sheet);border-radius:var(--r-m)}
.seg label{position:relative;display:grid;gap:2px;justify-items:center;padding:6px 4px;text-align:center;font-weight:500;font-size:14px;line-height:1.3;cursor:pointer;border-radius:var(--r-s);transition:background var(--t-move) var(--ease-move),color var(--t-move) var(--ease-move)}
.seg label input{position:absolute;opacity:0;width:0;height:0}
.seg label small{font-weight:400;font-size:12px;color:var(--mute);white-space:nowrap}
.seg label:hover{background:var(--tile)}
.seg label:has(input:checked){background:var(--ink);color:var(--sheet)}
.seg label:has(input:checked) small{color:var(--night-mute)}
/* result: the answer, then the load meter under it */
.total{display:grid;gap:var(--s8)}
.total .big{font-weight:500;font-size:clamp(30px,2.4vw,38px);line-height:1;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.total .load{display:grid;gap:var(--s8);margin-top:4px;color:var(--ink)}
.total .load .row{display:flex;justify-content:space-between;gap:var(--s16);font-size:12px;color:var(--mute)}
.total .load .segs i.on{background:var(--ink)}
.total .load .segs.over i.on{background:var(--signal)}
.total .load.over .row em{color:var(--signal)}
.calc-msg{display:none;margin-top:-8px;font-size:13px;color:var(--mute)}
.calc-msg.on{display:block}
.calc-msg.warn{color:var(--signal)}
.calc-msg b{font-weight:500;color:var(--ink)}

/* phone: title → scene → controls (the card dissolves into the column so the scene can sit between) */
@media (max-width:899px){.calc-sec{min-height:0}.calc{gap:var(--s16)}.calc-card{display:contents}.calc-head{order:-2}.scene-box{order:-1;padding:var(--s8)}}

/* ---------- how it works: two equal columns, list left, tall visual right ---------- */
.how{display:grid;gap:var(--s40)}
@media (min-width:1100px){.how{grid-template-columns:subgrid;column-gap:var(--col-gap);align-items:stretch}.how-left{grid-column:1/7}.flow{grid-column:7/13}}
.how-left{display:grid;gap:var(--s40);align-content:space-between}
.how-left .sec-head{grid-template-columns:minmax(0,1fr);gap:var(--s16);padding-bottom:0}
.how-left .sec-head>*{grid-column:auto}
.how-left .sec-head .lead{max-width:40ch}
/* principle sits right after the hero, so the parts list gets its own small label */
.how-parts{display:grid;gap:var(--s8)}
/* parts = ruled list on paper, same left edge as the title; one open, auto-advances until the user clicks */
.htab{position:relative}
.htab-q{width:100%;display:grid;grid-template-columns:auto 1fr;gap:var(--s16);align-items:center;padding:18px 0;text-align:left;font-size:17px;font-weight:500;letter-spacing:-.015em;color:var(--mute);transition:color var(--t-move) var(--ease-move)}
.htab-q:hover,.htab.open .htab-q{color:var(--ink)}
.htab .tag{background:transparent;box-shadow:none;padding:0;min-width:32px;color:var(--mute)}
.htab.open .tag{color:var(--signal)}
.htab-a{height:0;overflow:hidden}
.htab.open .htab-a{height:auto}
.htab-a p{padding:0 0 var(--s24) calc(32px + var(--s16));color:var(--mute);font-size:15px;max-width:44ch}
.htab .bar{position:absolute;left:calc(32px + var(--s16));right:0;bottom:0;height:2px;border-radius:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;pointer-events:none}
.htabs.auto .htab.open .bar{animation:htab-run var(--htab-ms,5000ms) linear forwards}
@keyframes htab-run{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@media (prefers-reduced-motion:reduce){.htabs.auto .htab.open .bar{animation:none}}
/* visual = fixed-height sheet so the accordion never moves the page */
/* sheet with a drafting dot grid */
.flow{display:grid;grid-template-rows:auto 1fr auto;gap:var(--s24);padding:var(--pad);background:radial-gradient(circle,var(--line-2) 1px,transparent 1.2px) 0 0/24px 24px,var(--sheet);border-radius:var(--r-l);min-width:0}
@media (min-width:1100px){.flow{height:760px}}
.flow-top{display:flex;justify-content:space-between;align-items:center;gap:var(--s16);flex-wrap:wrap}
.toggle{display:inline-flex;gap:4px;padding:4px;background:var(--tile);box-shadow:inset 0 0 0 1px var(--edge);border-radius:var(--r-m)}
.toggle button{height:36px;padding:0 14px;font-size:14px;font-weight:500;border-radius:var(--r-s);transition:background var(--t-move) var(--ease-move),color var(--t-move) var(--ease-move)}
.toggle button[aria-pressed="true"]{background:var(--ink);color:var(--sheet)}
/* vertical chain grid → switch → home, battery hangs off the switch to the right */
.flow-grid{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,2fr) minmax(0,6fr);grid-template-rows:auto 96px auto 96px auto;align-items:center;align-self:center;width:100%}
/* node = icon tile + name + live state */
.node{display:grid;grid-template-columns:40px minmax(0,1fr);column-gap:var(--s16);row-gap:2px;align-items:center;padding:var(--s16) var(--s24) var(--s16) var(--s16);background:var(--paper);border-radius:var(--r-m);min-height:96px;transition:box-shadow var(--t-move) var(--ease-move),opacity var(--t-move) var(--ease-move)}
.node .ic{grid-row:1/3;display:grid;place-items:center;width:40px;height:40px;border-radius:var(--r-s);background:var(--sheet);transition:background var(--t-move) var(--ease-move),color var(--t-move) var(--ease-move)}
.node .ic svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.node.hot .ic{background:var(--ink);color:var(--sheet)}
.node.batt.hot .ic{background:var(--signal);color:var(--ink)}
.node.n-grid:not(.hot){opacity:.5}
.node .charge{grid-column:1/-1;display:grid;grid-template-columns:1fr auto;gap:var(--s16);align-items:center;margin-top:var(--s16)}
.node .charge .segs{color:var(--ink)}
.node .charge b{font-weight:500;font-size:13px;font-variant-numeric:tabular-nums}
.node .cap{font-weight:500;font-size:18px;line-height:1.2;letter-spacing:-.015em}
.node .st{font-size:13px;color:var(--mute)}

.node.n-grid{grid-column:1;grid-row:1}
.node.n-sw{grid-column:1;grid-row:3}
.node.n-home{grid-column:1;grid-row:5}
.node.batt{grid-column:3;grid-row:3}
.wire{position:relative;height:2px;background:var(--line-2);transition:opacity var(--t-move) var(--ease-move)}
.wire.hot{background:var(--ink)}
.wire.hot::after{content:"";position:absolute;top:-3px;left:0;width:8px;height:8px;border-radius:50%;background:var(--signal);animation:run 1.8s linear infinite}
.wire .lbl{position:absolute;left:50%;top:-24px;transform:translateX(-50%);font-size:12px;color:var(--mute);white-space:nowrap}
.wire.dim{opacity:.35}
.wire.dim::after{display:none}
.wire.up::after{animation-direction:reverse}
@keyframes run{from{left:0}to{left:calc(100% - 7px)}}
.wire.wv{grid-column:2;grid-row:3}
.wire.v{height:100%;width:2px;justify-self:center}
.wire.w1{grid-column:1;grid-row:2}
.wire.w2{grid-column:1;grid-row:4}
.wire.v::after{animation:runv 1.8s linear infinite;left:-3px;top:0}
.wire.v .lbl{left:16px;top:50%;transform:translateY(-50%)}
@keyframes runv{from{top:0}to{top:calc(100% - 7px)}}
.flow .on-batt{display:none}
.flow[data-mode="battery"] .on-batt{display:inline}
.flow[data-mode="battery"] .on-grid{display:none}
.flow-note{font-size:14px;color:var(--mute)}
@media (max-width:899px){
  .flow-grid{grid-template-columns:1fr;grid-template-rows:auto;gap:var(--s8)}
  .wire{display:none}
  .node,.node.batt,.node.n-grid,.node.n-sw,.node.n-home{grid-column:auto;grid-row:auto}
}

/* ---------- advantages: bento on the 12-col grid — big dark tile 1–7 × 2 rows, two stacked on the right, three 4-col tiles below ---------- */
.bento{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--col-gap)}
@media (min-width:600px){.bento{grid-template-columns:1fr 1fr}.bx-a{grid-column:1/-1}.bento>.bx:last-child{grid-column:1/-1}}
@media (min-width:900px){
  .bento{grid-template-columns:subgrid;grid-template-rows:auto auto auto}
  .bento>.bx{grid-column:span 4}
  .bento>.bx-a{grid-column:1/8;grid-row:1/3}
  .bento>.bx-b{grid-column:8/13;grid-row:1}
  .bento>.bx-c{grid-column:8/13;grid-row:2}
  .bento>.bx:last-child{grid-column:span 4}
}
.bx{display:grid;align-content:space-between;gap:var(--s32);min-height:240px;padding:clamp(24px,2.4vw,32px);background:var(--sheet);border-radius:var(--r-l)}
.bx .num{white-space:nowrap;font-weight:500;font-size:clamp(40px,4vw,64px);line-height:1;letter-spacing:-.04em;font-variant-numeric:tabular-nums}
.bx .num small{font-size:16px;letter-spacing:0;color:var(--mute);margin-left:8px;font-weight:400}
.bx .t{display:grid;gap:var(--s8)}
.bx .t p{color:var(--mute);font-size:15px;max-width:40ch}
.bx.dark{background:var(--night);color:var(--night-ink)}
.bx.dark .num small,.bx.dark .t p{color:var(--night-mute)}
.bx{position:relative;overflow:hidden;isolation:isolate}
.bx-a{min-height:clamp(420px,40vw,600px)}
.bx-a .num{font-size:clamp(64px,8vw,128px)}
/* photos: the battery stands in the dark tile, the hallway fills the frost tile, the kit cut-out sits in the warranty tile */
.bx-photo{position:absolute;right:-4%;top:50%;transform:translateY(-46%);width:64%;max-width:600px;z-index:-1;pointer-events:none}
.bx.photo{color:var(--night-ink)}
.bx.photo .num small,.bx.photo .t p{color:rgba(236,235,230,.78)}
.bx-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:30% 40%;z-index:-2}
.bx.photo::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(0deg,rgba(15,17,19,.78) 0%,rgba(15,17,19,.2) 55%,rgba(15,17,19,.45) 100%)}
.bx-cut{position:absolute;right:var(--s24);top:var(--s24);width:38%;max-width:200px;z-index:-1;pointer-events:none}
@media (max-width:599px){.bx-photo{position:relative;right:auto;top:auto;transform:none;width:100%;margin:-8px 0}}
/* visuals: years of life, mains wave through the switch, one day of install */
.day{display:grid;gap:10px}
.bx .row{display:flex;justify-content:space-between;gap:var(--s16);font-size:12px;color:var(--mute)}
.bx.dark .row{color:var(--night-mute)}
.wave{width:100%;height:64px;overflow:visible}
.wave path{fill:none;stroke:var(--ink);stroke-width:1.5;vector-effect:non-scaling-stroke}
.wave .gap{fill:var(--signal);opacity:.22}
.day .segs{color:var(--ink)}
.day .segs i:nth-child(n+10):nth-child(-n+13){opacity:1;background:var(--signal)}

/* ---------- compare: head inside the panel ---------- */
.cmp{overflow-x:auto;background:var(--sheet);border-radius:var(--r-l);padding:0 var(--pad) var(--s24)}
.cmp-head{display:grid;gap:var(--s16);padding:var(--pad) 0 var(--s16)}
@media (min-width:900px){.cmp-head{grid-template-columns:7fr 5fr;gap:var(--s48);align-items:end}}
.cmp-head .t{display:grid;gap:12px}
.cmp-head .lead{color:var(--mute);max-width:44ch}
.cmp table{width:100%;min-width:720px;border-collapse:collapse}
.cmp th,.cmp td{padding:12px var(--s24) 12px 0;text-align:left;border-bottom:1px solid var(--line);vertical-align:baseline}
.cmp tbody tr:last-child th,.cmp tbody tr:last-child td{border-bottom:0}
.cmp th{font-weight:400;color:var(--mute);font-size:15px}
.cmp thead th{color:var(--ink);padding:var(--s24) var(--s24) var(--s16) 0;font-size:22px;font-weight:500;letter-spacing:-.025em;border-bottom-color:var(--ink)}
.cmp thead th small{display:block;font-size:12px;color:var(--mute);font-weight:400;letter-spacing:0;margin-top:4px}
.cmp td{font-size:14px;font-variant-numeric:tabular-nums}
.cmp td.diff{color:var(--ink)}
.cmp td.same{color:var(--mute)}
.cmp td.price{font-size:18px;color:var(--ink)}
.cmp tbody th{width:22%}

/* ---------- steps: one sheet, 3 grid columns per step ---------- */
.steps{display:grid;grid-template-columns:minmax(0,1fr);background:var(--sheet);border-radius:var(--r-l);padding:var(--s8) 0}
@media (min-width:600px){.steps{grid-template-columns:1fr 1fr}}
@media (min-width:900px){.steps{grid-template-columns:subgrid;column-gap:var(--col-gap)}.step{grid-column:span 3}}
.step{display:grid;gap:var(--s48);padding:var(--s24);align-content:start}
.step .n{justify-self:start}
.step .t{display:grid;gap:var(--s8)}
.step p{color:var(--mute);font-size:15px;max-width:30ch}

/* ---------- faq: one sheet, hairline rows ---------- */
.faq-wrap{display:grid;gap:var(--s40)}
@media (min-width:900px){.faq-wrap{grid-template-columns:subgrid;column-gap:var(--col-gap);align-items:start}.faq-side{grid-column:1/5}.faq{grid-column:5/13}}
.faq-side{display:grid;gap:12px}
.faq-side .eyebrow{color:var(--mute)}
.faq-side p.mute{max-width:36ch}
.faq{display:grid;background:var(--sheet);border-radius:var(--r-l);padding:var(--s8) var(--pad)}
.faq-item{border-top:1px solid var(--line)}
.faq-item:first-child{border-top:0}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:var(--s24);padding:20px 0;text-align:left;font-size:17px;font-weight:500;letter-spacing:-.015em}
.faq-q svg{width:16px;height:16px;stroke:currentColor;stroke-width:1.6;fill:none}
.faq-q svg .v{transition:transform var(--t-move) var(--ease-move);transform-origin:center}
.faq-item.open .faq-q svg .v{transform:rotate(90deg)}
.faq-a{height:0;overflow:hidden}
.faq-item.open .faq-a{height:auto}
.faq-a p{padding:0 0 var(--s24);color:var(--mute);max-width:60ch}

/* ---------- contact ---------- */
.contact{display:grid;gap:var(--gap)}
@media (min-width:900px){.contact{grid-template-columns:subgrid;column-gap:var(--col-gap);align-items:stretch}.contact-left{grid-column:1/7}.form{grid-column:7/13}}
.contact-left{display:grid;gap:var(--s40);align-content:space-between;padding:var(--pad);background:var(--sheet);border-radius:var(--r-l)}
.contact-left .t{display:grid;gap:12px}
.contact-left .t .eyebrow{color:var(--mute)}
.contact-left .t p.mute{max-width:40ch}
.contact .tbl .v{white-space:normal}
.form{position:relative;background:var(--sheet);padding:var(--pad);border-radius:var(--r-l)}
.form-in{display:grid;gap:var(--s16)}
.form-in .btn{justify-self:start}
.form-ok{display:none;gap:var(--s8)}
.form.sent .form-in{display:none}
.form.sent .form-ok{display:grid}

/* ---------- footer: dark band, content on the grid ---------- */
.footer{margin-top:var(--section);padding:var(--pad) var(--margin);background:var(--night);color:var(--night-ink);border-radius:var(--r-l)}
.footer-top{display:grid;gap:var(--s32)}
@media (min-width:900px){.footer-top{grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--col-gap)}.footer-brand{grid-column:1/7}.fcols{grid-column:7/13;grid-template-columns:subgrid;column-gap:var(--col-gap)}.fcol{grid-column:span 2}}
.footer-brand{display:grid;gap:var(--s24);align-content:start}
.footer-brand p{color:var(--night-mute);font-size:14px}
.footer-charge{display:grid;gap:10px;max-width:280px;color:var(--night-ink)}
.footer-charge .row{display:flex;justify-content:space-between;font-size:12px;color:var(--night-mute)}
.footer-charge .row span{color:var(--night-ink)}
.fcols{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s24)}
@media (max-width:599px){.fcols{grid-template-columns:1fr}}
.fcol{display:grid;gap:var(--s8);align-content:start;font-size:14px}
.fcol .eyebrow{color:var(--night-mute);margin-bottom:var(--s8)}
.fcol a:hover{color:var(--signal)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:var(--s8);margin-top:var(--s48);font-size:12px;color:var(--night-mute)}

/* ---------- kit specs modal: centred panel (bottom sheet on phones), photo tile left, table right ---------- */
.spec-modal{position:fixed;inset:0;width:100%;height:100%;max-width:none;max-height:none;margin:0;padding:var(--frame);border:0;background:transparent;color:var(--ink);display:grid;place-items:center;opacity:0;pointer-events:none;transition:opacity var(--t-exit) var(--ease-exit)}
.spec-modal:not([open]){display:none}
.spec-modal::backdrop{background:rgba(15,17,19,.4);opacity:0;transition:opacity var(--t-exit) var(--ease-exit)}
.spec-modal.show{opacity:1;pointer-events:auto;transition:opacity var(--t-enter) var(--ease-enter)}
.spec-modal.show::backdrop{opacity:1;transition:opacity var(--t-enter) var(--ease-enter)}
.spec-card{width:min(960px,100%);max-height:calc(100svh - var(--frame) * 2);overflow:auto;display:grid;grid-template-columns:minmax(0,1fr);gap:var(--s8);padding:var(--s8);background:var(--sheet);border-radius:var(--r-l);transform:translateY(16px) scale(.98);transition:transform var(--t-exit) var(--ease-exit)}
.spec-modal.show .spec-card{transform:none;transition:transform var(--t-enter) var(--ease-enter)}
@media (min-width:900px){.spec-card{grid-template-columns:5fr 7fr}}
.spec-photo{display:grid;place-items:center;aspect-ratio:4/3;border-radius:var(--r-m);background:radial-gradient(110% 85% at 50% 30%,#ECEAE5 0%,#DEDBD3 52%,#D2CFC6 100%)}
@media (min-width:900px){.spec-photo{aspect-ratio:auto;min-height:100%}}
.spec-photo img{max-width:78%;max-height:min(76%,340px);object-fit:contain;filter:drop-shadow(0 22px 18px rgba(21,21,18,.16)) drop-shadow(0 4px 4px rgba(21,21,18,.12))}
.spec-main{display:grid;align-content:start;gap:var(--s24);padding:var(--s16) var(--s16) var(--s8)}
@media (min-width:900px){.spec-main{padding:var(--s24) var(--s24) var(--s16) var(--s16)}}
.spec-head{display:flex;justify-content:space-between;align-items:start;gap:var(--s16)}
.spec-head .t{display:grid;gap:var(--s8)}
.spec-main .tbl>div:not(.cap){grid-template-columns:minmax(96px,auto) 1fr}
.spec-main .tbl .v{white-space:normal}
.spec-foot{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:var(--s16)}
.spec-foot .price{display:grid;gap:var(--s8)}
.spec-foot .price .data{font-weight:500;font-size:clamp(26px,2.2vw,32px);line-height:1;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.spec-modal,.spec-card{outline:0}
@media (max-width:899px){.spec-photo{aspect-ratio:16/9}.spec-photo img{max-width:44%;max-height:86%}}
@media (max-width:599px){.spec-modal{place-items:end center}.spec-foot .btn{width:100%}}
@media (prefers-reduced-motion:reduce){.spec-modal,.spec-modal::backdrop,.spec-card{transition:none!important}}

/* ---------- request drawer: floating panel ---------- */
.cart-overlay{position:fixed;inset:0;background:rgba(15,17,19,.4);opacity:0;pointer-events:none;transition:opacity var(--t-move) var(--ease-move);z-index:200}
.cart{position:fixed;top:var(--frame);right:var(--frame);bottom:var(--frame);width:min(460px,calc(100% - var(--frame) * 2));background:var(--sheet);color:var(--ink);border-radius:var(--r-l);overflow:hidden;z-index:201;display:grid;grid-template-rows:auto 1fr auto;transform:translateX(calc(100% + var(--frame) * 2));transition:transform var(--t-move) var(--ease-move)}
body.cart-open .cart-overlay{opacity:1;pointer-events:auto}
body.cart-open .cart{transform:none}
body.cart-open{overflow:hidden}
.cart-head{display:flex;justify-content:space-between;align-items:center;padding:var(--s24);border-bottom:1px solid var(--line)}
.cart-head .t{display:grid;gap:2px}
.cart-head .data{font-size:12px;color:var(--mute)}
.cart-x{width:40px;height:40px;display:grid;place-items:center;background:var(--tile);box-shadow:inset 0 0 0 1px var(--edge);border-radius:var(--r-s)}
.cart-body{overflow:auto;padding:var(--s16) var(--s24)}
.inv{display:grid;gap:var(--s8)}
.inv-row{display:grid;grid-template-columns:1fr auto;gap:var(--s8) var(--s16);padding:var(--s16);background:var(--tile);box-shadow:inset 0 0 0 1px var(--edge);border-radius:var(--r-m);align-items:center}
.inv-row .name{font-weight:500}
.inv-row .sum{text-align:right}
.inv-row .qty{display:inline-flex;align-items:center;background:var(--sheet);border-radius:var(--r-s);overflow:hidden;font-size:14px}
.inv-row .qty button{width:32px;height:32px}
.inv-row .qty span{min-width:28px;text-align:center}
.inv-row .each{font-size:12px;color:var(--mute);text-align:right}
.cart-empty{display:grid;gap:var(--s16);color:var(--mute);padding:var(--s24) 0}
.cart-empty[hidden]{display:none}
.cart-empty .btn{justify-self:start}
.cart-form{display:none;gap:var(--s16)}
.cart-sum{display:grid;gap:2px;font-size:14px;color:var(--mute);padding:var(--s16);background:var(--tile);box-shadow:inset 0 0 0 1px var(--edge);border-radius:var(--r-m)}
.cart-sum b{font-weight:500;color:var(--ink)}
.cart-done{display:none;gap:var(--s16);padding:var(--s24) 0}
.cart-done .btn{justify-self:start}
.cart[data-state="form"] .inv,.cart[data-state="form"] .cart-empty,.cart[data-state="form"] .cart-foot{display:none}
.cart[data-state="form"] .cart-form{display:grid}
.cart[data-state="done"] .inv,.cart[data-state="done"] .cart-empty,.cart[data-state="done"] .cart-foot,.cart[data-state="done"] .cart-form{display:none}
.cart[data-state="done"] .cart-done{display:grid}
.cart-foot{display:grid;gap:var(--s16);padding:var(--s24);border-top:1px solid var(--line)}
.cart-total{display:flex;justify-content:space-between;align-items:baseline}
.cart-total .data{font-size:24px;letter-spacing:-.02em}
.cart-note{font-size:13px;color:var(--mute)}