/* Battery HQ Solar Calculator. One light look on purpose: navy ink, sun amber, warm sand like the 3D ground.
   Layout: one column app shell; header with progress, scrolling step, action bar pinned to the bottom. */
@font-face{font-family:"Bricolage";src:url("fonts/bricolage-grotesque.woff2") format("woff2");font-weight:200 800;font-display:swap}
:root{
  --ink:#14212e;--ink-2:#4a5a68;--ink-3:#7b8995;--line:#e3ded3;--sand:#f6f1e7;--card:#fffdf9;
  --sun:#f2a93b;--sun-deep:#b9700e;--sun-soft:#fff1d9;--good:#2f8a62;--good-soft:#e5f3eb;--white:#fff;
  --display:"Bricolage","Segoe UI Variable Display","Segoe UI",system-ui,sans-serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --r:16px;--bar:64px;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--sand);color:var(--ink);font:16px/1.45 var(--body);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px}
.shell{max-width:760px;margin:0 auto;min-height:100%;display:flex;flex-direction:column}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--ink);color:var(--white);padding:12px 16px 10px}
.brand{display:flex;align-items:center;gap:10px}
.brand svg{width:28px;height:28px;flex:none}
.brand b{font:700 17px var(--display);letter-spacing:-.01em}
.brand span{font-size:13px;color:#aebccb;margin-left:auto}
.progress{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:10px}
.progress i{height:4px;border-radius:4px;background:#34485a}
.progress i.on{background:var(--sun)}

/* steps */
main{flex:1;padding:22px 16px calc(var(--bar) + 40px + env(safe-area-inset-bottom,0px))}
.step[hidden]{display:none}
.kicker{font-size:12.5px;text-transform:uppercase;letter-spacing:.09em;color:var(--sun-deep);font-weight:700;margin:0 0 6px}
h1{font:750 clamp(26px,7vw,34px)/1.08 var(--display);letter-spacing:-.025em;margin:0 0 8px;text-wrap:balance}
h2{font:700 19px/1.2 var(--display);margin:26px 0 10px}
.lead{color:var(--ink-2);margin:0 0 20px;max-width:34em}

/* step 1: building */
.homes{display:grid;gap:12px}
.home{display:grid;grid-template-columns:72px 1fr;gap:14px;align-items:center;text-align:left;background:var(--card);border:2px solid var(--line);border-radius:var(--r);padding:12px 14px}
.home svg{width:72px;height:56px}
.home b{display:block;font:700 17px var(--display)}
.home small{color:var(--ink-2);font-size:14px}
.home[aria-checked="true"]{border-color:var(--ink);box-shadow:0 0 0 2px var(--ink) inset;background:var(--white)}

/* step 2: appliances */
.tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
@media (min-width:560px){.tiles{grid-template-columns:repeat(3,minmax(0,1fr))}}
.tile{background:var(--card);border:2px solid var(--line);border-radius:var(--r);padding:12px;display:flex;flex-direction:column;gap:8px;min-width:0}
.tile.on{border-color:var(--sun);background:var(--white)}
.tile header{display:flex;gap:10px;align-items:center;min-width:0}
.tile svg{width:30px;height:30px;flex:none;color:var(--ink)}
.tile .name{font-weight:650;font-size:15px;line-height:1.2;min-width:0}
.tile .w{font-size:12px;color:var(--ink-3)}
.stepper{display:grid;grid-template-columns:40px 1fr 40px;align-items:center;border-radius:12px;background:var(--sand);overflow:hidden}
.stepper button{height:40px;border:0;background:none;font-size:22px;font-weight:600}
.stepper button:disabled{color:var(--ink-3);opacity:.5}
.stepper output{text-align:center;font:700 17px var(--display);font-variant-numeric:tabular-nums}
.tile.on .stepper{background:var(--sun-soft)}

/* step 3: power supply and power cuts */
.supply{display:grid;gap:10px;margin:0 0 4px}
.opt{display:grid;grid-template-columns:34px 1fr;gap:14px;align-items:center;text-align:left;background:var(--card);border:2px solid var(--line);border-radius:var(--r);padding:13px 14px}
.opt svg{width:30px;height:30px;color:var(--sun-deep)}
.opt b{display:block;font:700 17px var(--display)}
.opt small{color:var(--ink-2);font-size:14px}
.opt[aria-checked="true"]{border-color:var(--ink);box-shadow:0 0 0 2px var(--ink) inset;background:var(--white)}
.checks{display:grid;gap:8px}
.check{display:flex;align-items:center;gap:12px;background:var(--card);border:2px solid var(--line);border-radius:14px;padding:11px 14px}
.check svg{width:26px;height:26px;flex:none}
.check span{flex:1;font-weight:600}
.check small{display:block;font-weight:400;color:var(--ink-3);font-size:12.5px}
.switch{appearance:none;width:46px;height:28px;border-radius:999px;background:#d6d0c4;position:relative;flex:none;transition:background .15s}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:var(--white);box-shadow:0 1px 3px rgba(0,0,0,.25);transition:transform .15s}
.switch:checked{background:var(--good)}
.switch:checked::after{transform:translateX(18px)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:2px solid var(--line);background:var(--card);border-radius:999px;padding:9px 15px;font-weight:600;font-size:15px}
.chip[aria-checked="true"]{background:var(--ink);border-color:var(--ink);color:var(--white)}
.hint{font-size:13.5px;color:var(--ink-2);margin:10px 0 0}

/* step 4: result */
.stage{position:relative;height:min(58vh,440px);min-height:300px;border-radius:var(--r);overflow:hidden;background:linear-gradient(#bcd6e6,#ece4d2);margin:0 0 14px}
.stage canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}
.stage .tags{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.stage-ui{position:absolute;left:10px;right:10px;top:10px;display:flex;gap:8px;flex-wrap:wrap;pointer-events:none}
.stage-ui>*{pointer-events:auto}
.pill{border:0;border-radius:999px;padding:8px 13px;font-weight:650;font-size:13.5px;background:rgba(255,255,255,.88);color:var(--ink);box-shadow:0 4px 14px rgba(15,35,50,.15)}
.pill[aria-pressed="true"]{background:var(--ink);color:var(--white)}
.sunbar{position:absolute;left:10px;right:10px;bottom:10px;display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.88);border-radius:999px;padding:6px 14px;box-shadow:0 4px 14px rgba(15,35,50,.15);font:700 14px var(--display);font-variant-numeric:tabular-nums}
.sunbar input{flex:1;accent-color:var(--sun-deep)}
.live{position:absolute;left:10px;bottom:58px;max-width:calc(100% - 20px);background:rgba(20,33,46,.82);color:var(--white);border-radius:999px;padding:6px 12px;font:600 12.5px var(--body);font-variant-numeric:tabular-nums;pointer-events:none;box-shadow:0 4px 14px rgba(15,35,50,.2)}
.live[hidden]{display:none}
.live b{font-weight:750}
.no3d{display:grid;place-items:center;text-align:center;padding:20px;color:var(--ink-2);height:100%}

.result{display:grid;gap:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.kit{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:6px}
.kit div{background:var(--sand);border-radius:12px;padding:10px;min-width:0}
.kit dt{font-size:12px;color:var(--ink-2);text-transform:uppercase;letter-spacing:.06em}
.kit dd{margin:3px 0 0;font:750 20px/1.1 var(--display);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.kit small{display:block;font-size:12px;color:var(--ink-3);margin-top:3px;line-height:1.25}
.facts{display:grid;gap:10px;margin:14px 0 0;padding:0;list-style:none}
.facts li{display:grid;grid-template-columns:30px 1fr;gap:10px;align-items:start}
.facts svg{width:26px;height:26px}
.price{background:var(--ink);color:var(--white);border:0}
.price .kicker{color:var(--sun)}
.price strong{display:block;font:800 clamp(28px,8.5vw,40px)/1.05 var(--display);letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin:4px 0 8px}
.price p{margin:0;color:#c3cfda;font-size:14px}
.notes{display:grid;gap:8px;margin:0;padding:0;list-style:none}
.notes li{background:var(--sun-soft);border-radius:12px;padding:10px 12px;font-size:14.5px}
.lead-form{display:grid;gap:10px}
.lead-form label{display:grid;gap:4px;font-size:13.5px;font-weight:650;color:var(--ink-2)}
.lead-form input{border:2px solid var(--line);border-radius:12px;padding:11px 12px;background:var(--white);font-size:16px}
.wa{display:flex;align-items:center;justify-content:center;gap:10px;background:#1fa855;color:var(--white);text-decoration:none;font:700 17px var(--display);border-radius:14px;padding:15px}
.wa svg{width:24px;height:24px}
.contact{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;font-size:14.5px;color:var(--ink-2)}
.contact b{color:var(--ink);user-select:all;font-variant-numeric:tabular-nums}
.link{border:0;background:none;color:var(--sun-deep);font-weight:700;padding:0;text-decoration:underline;text-underline-offset:3px}
.fine{font-size:12.5px;color:var(--ink-3);margin:6px 0 0}
.custom h2{margin-top:6px}

/* bottom bar */
.bar{position:fixed;left:0;right:0;bottom:0;z-index:30;background:rgba(246,241,231,.94);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-top:1px solid var(--line);padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px))}
.bar-in{max-width:728px;margin:0 auto;display:flex;align-items:center;gap:10px}
.bar .sum{flex:1;font-size:13.5px;color:var(--ink-2);min-width:0}
.bar .sum b{color:var(--ink);font-variant-numeric:tabular-nums}
.btn{border:0;border-radius:14px;padding:14px 20px;font:700 16px var(--display);background:var(--sun);color:#1d1405}
.btn.ghost{background:transparent;color:var(--ink);border:2px solid var(--line)}
.btn:disabled{opacity:.45}
.toast{position:fixed;left:50%;bottom:calc(var(--bar) + 30px + env(safe-area-inset-bottom,0px));transform:translate(-50%,10px);background:var(--ink);color:var(--white);padding:10px 16px;border-radius:12px;opacity:0;transition:.2s;pointer-events:none;z-index:40;font-size:14px;max-width:calc(100% - 32px)}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* 3D labels (shared with Solar Studio's scene) */
.tag{position:absolute;left:0;top:0;background:var(--ink);color:var(--white);font:600 11.5px var(--body);padding:4px 9px;border-radius:6px;white-space:nowrap;opacity:0;transition:opacity .25s;box-shadow:0 6px 18px rgba(10,20,30,.25)}
.tag::after{content:"";position:absolute;left:50%;bottom:-5px;width:9px;height:9px;background:inherit;transform:translateX(-50%) rotate(45deg);border-radius:2px}
.tag.solar{background:#1f3f66}
.tag.battery{background:var(--good)}
.tag.appliance{background:rgba(75,91,105,.92);font-size:10.5px;padding:3px 7px}
.tag.appliance.backup{background:rgba(47,138,98,.95)}
.tag.appliance::after{width:7px;height:7px;bottom:-3px}
.tag.building{background:rgba(122,136,148,.92);font-size:10.5px;padding:3px 7px}

@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.ic{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.facts .ic{color:var(--sun-deep)}
.check .ic{color:var(--ink-2)}
.wa svg{color:var(--white)}
.kit dd .u{font-size:13px;font-weight:650;letter-spacing:0}
@media (max-width:600px){.tag.appliance{display:none}}