:root{--bg:#06111f;--bg-soft:#0a192a;--panel:#0d1d30;--panel-2:#11243a;--line:rgba(255,255,255,.11);--text:#f3f7fb;--muted:#9fb0c3;--accent:#7ee7b7;--accent-2:#72b8ff;--warning:#ffd280;--danger:#ff9f9f;--shadow:0 24px 70px rgba(0,0,0,.28);--radius:20px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(circle at 82% 4%,rgba(71,132,196,.14),transparent 27rem),radial-gradient(circle at 12% 18%,rgba(71,196,147,.08),transparent 25rem),var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}
button,input,select{font:inherit}
button{cursor:pointer}
a{color:inherit}
h1,h2,h3,p{margin-top:0}
.eyebrow,.step{color:var(--accent);font-size:.72rem;font-weight:850;letter-spacing:.16em;text-transform:uppercase;margin:0 0 10px}

/* header / nav / breadcrumbs, matching the rest of the site */
.site-header{width:min(1440px,calc(100% - 40px));margin:0 auto;height:82px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;text-decoration:none;flex:0 0 auto}
.brand-logo{display:block;width:228px;height:auto;max-width:228px;object-fit:contain}
.site-header nav{display:flex;gap:28px}
.site-header nav a{text-decoration:none;color:var(--muted);font-size:.92rem}
.site-header nav a:hover{color:var(--text)}
.site-header nav a[aria-current="page"]{color:var(--accent)}
main{width:min(1160px,calc(100% - 40px));margin:0 auto}
.breadcrumbs{display:flex;align-items:center;gap:8px;padding-top:20px;color:#7f92a7;font-size:.72rem}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--text)}
.mobile-breadcrumbs{display:none}

/* hero */
.hero{padding:52px 0 34px}
h1{font-size:clamp(2.4rem,5.5vw,4.2rem);letter-spacing:-.05em;line-height:1;margin-bottom:20px;max-width:820px}
.lede{color:#c4d1de;font-size:clamp(1.02rem,2vw,1.2rem);max-width:740px;margin-bottom:20px}
.hero-trust{display:grid;gap:7px;color:#c8d5e2;font-size:.84rem;margin-bottom:18px}
.hero-trust span::first-letter{color:var(--accent)}
.tool-meta{display:flex;gap:10px;flex-wrap:wrap;color:#8093a8;font-size:.7rem;margin-bottom:16px}
.tool-meta span,.tool-meta a{padding:5px 8px;border:1px solid rgba(255,255,255,.09);border-radius:999px}
.tool-meta a{color:var(--accent);text-decoration:none}
.hero-notice{padding:15px 17px;border:1px solid rgba(126,231,183,.26);background:rgba(126,231,183,.06);border-radius:12px;color:var(--muted);font-size:.86rem;max-width:860px}
.hero-notice strong{color:var(--text)}

/* generic section heading, matching battery comparison's step pattern */
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.section-heading h2{font-size:clamp(1.3rem,2.4vw,1.7rem);letter-spacing:-.03em;margin:0 0 4px}
.section-heading p{color:var(--muted);font-size:.86rem;margin:0;max-width:640px}
.secondary-button{border:1px solid var(--line);background:transparent;color:var(--text);border-radius:999px;padding:9px 15px;font-size:.8rem}
.secondary-button:hover{border-color:var(--accent);color:var(--accent)}

/* shell: inputs stacked, results sticky alongside */
.finder-shell{display:grid;grid-template-columns:minmax(360px,1fr) minmax(320px,.8fr);gap:22px;align-items:start;margin:6px 0 40px}
.inputs-panel{display:flex;flex-direction:column;gap:18px}
.card{border:1px solid var(--line);border-radius:var(--radius);background:rgba(10,25,42,.84);box-shadow:var(--shadow);padding:24px}
.results-panel{position:sticky;top:20px;border:1px solid var(--line);border-radius:var(--radius);background:rgba(10,25,42,.84);box-shadow:var(--shadow);padding:26px}

/* option buttons (data source, occupancy, goal) */
.option-grid{display:grid;gap:8px}
.option-grid.cols-2{grid-template-columns:repeat(2,1fr)}
.option-grid.cols-4{grid-template-columns:repeat(4,1fr)}
.option-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.option-btn{border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--text);padding:13px 12px;text-align:left}
.option-btn strong{display:block;font-size:.86rem;margin-bottom:3px}
.option-btn small{display:block;color:var(--muted);font-size:.7rem;line-height:1.4}
.option-btn.active{border-color:var(--accent);background:rgba(126,231,183,.1)}
.option-btn.active small{color:#bfe9d5}

.field{display:block;min-width:0;margin-bottom:14px}
.field:last-child{margin-bottom:0}
.field>span:first-child{display:block;color:var(--muted);font-size:.78rem;margin:0 0 6px 2px}
.field>span:first-child small{display:block;color:#71859a;font-size:.68rem;line-height:1.4;margin-top:2px;font-weight:400}
.input-wrap{display:flex;align-items:center;border:1px solid var(--line);background:rgba(255,255,255,.025);border-radius:10px;overflow:hidden}
.input-wrap:focus-within{border-color:rgba(126,231,183,.65);box-shadow:0 0 0 3px rgba(126,231,183,.08)}
.input-wrap i{color:#8194a9;font-style:normal;font-size:.72rem;white-space:nowrap;padding:0 10px}
.input-wrap input,.input-wrap select{width:100%;min-width:0;border:0;outline:0;color:var(--text);background:transparent;padding:11px 10px;font-size:1rem}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}

.unit-toggle{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:3px;margin-bottom:12px}
.unit-toggle button{border:0;background:transparent;color:var(--muted);border-radius:999px;padding:6px 14px;font-size:.76rem}
.unit-toggle button.active{background:var(--accent);color:var(--bg);font-weight:700}

.sub-panel{border-top:1px solid rgba(255,255,255,.08);margin-top:14px;padding-top:14px}
.meter-helper{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:10px}
.meter-result{font-size:.8rem;color:var(--muted);padding:10px 12px;border:1px dashed rgba(255,255,255,.16);border-radius:10px}
.meter-result strong{color:var(--accent)}

.checklist{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:14px}
.check-item{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);border-radius:11px;padding:11px 12px}
.check-item input{margin-top:3px;flex:0 0 auto;width:16px;height:16px;accent-color:var(--accent)}
.check-item span{display:flex;flex-direction:column}
.check-item strong{font-size:.83rem}
.check-item small{color:var(--muted);font-size:.68rem;margin-top:2px}

.schedule-toggle{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:11px;padding:12px;margin-bottom:4px}
.schedule-toggle input{width:16px;height:16px;accent-color:var(--accent)}
.schedule-toggle span{color:var(--muted);font-size:.78rem}
.schedule-toggle strong{color:var(--text)}

.checkbox-field{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);border-radius:11px;padding:12px;margin-bottom:8px}
.checkbox-field input{margin-top:3px;width:16px;height:16px;accent-color:var(--accent);flex:0 0 auto}
.checkbox-field span{display:flex;flex-direction:column}
.checkbox-field strong{font-size:.83rem}
.checkbox-field small{color:var(--muted);font-size:.7rem;margin-top:2px}

.howto{margin-top:2px}
.howto summary{list-style:none;cursor:pointer;color:var(--accent-2);font-size:.8rem;padding:4px 0;font-weight:700}
.howto summary::-webkit-details-marker{display:none}
.howto summary::before{content:"+ ";color:var(--accent)}
.howto[open] summary::before{content:"– "}
.howto-body{color:var(--muted);font-size:.82rem;line-height:1.65;padding-top:8px}
.howto-body ol{padding-left:18px;margin:8px 0}
.howto-body li{margin-bottom:6px}

.assumptions-note{margin-top:2px}
.assumptions-note summary{list-style:none;cursor:pointer;color:var(--muted);font-size:.78rem;padding:6px 0}
.assumptions-note summary::-webkit-details-marker{display:none}
.assumptions-note summary::before{content:"+ ";color:var(--accent)}
.assumptions-note[open] summary::before{content:"– "}
.assumptions-list{color:var(--muted);font-size:.78rem;line-height:1.7;margin:6px 0 0;padding-left:0;list-style:none}
.assumptions-list li{border-top:1px solid rgba(255,255,255,.07);padding:6px 0}

/* results */
.results-onboarding{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;min-height:320px;gap:14px}
.results-onboarding-icon{font-size:1.6rem;color:var(--accent)}
.results-onboarding h2{font-size:1.4rem;letter-spacing:-.03em}
.results-onboarding p{color:var(--muted);max-width:420px}
.results-panel.is-onboarding .results-body{display:none}
.results-panel:not(.is-onboarding) .results-onboarding{display:none}

.confidence-badge{display:inline-flex;align-items:center;gap:6px;font-size:.7rem;font-weight:750;padding:5px 11px;border-radius:999px;margin-bottom:14px;text-transform:uppercase;letter-spacing:.04em}
.confidence-high{background:rgba(126,231,183,.14);color:var(--accent);border:1px solid rgba(126,231,183,.3)}
.confidence-good{background:rgba(114,184,255,.14);color:var(--accent-2);border:1px solid rgba(114,184,255,.3)}
.confidence-medium{background:rgba(255,210,128,.14);color:var(--warning);border:1px solid rgba(255,210,128,.3)}
.confidence-low{background:rgba(255,159,159,.12);color:var(--danger);border:1px solid rgba(255,159,159,.28)}

.results-heading h2{font-size:clamp(1.25rem,2.4vw,1.6rem);letter-spacing:-.03em;line-height:1.2;margin-bottom:16px}
.result-cards{display:grid;grid-template-columns:1fr;gap:10px;margin-bottom:16px}
.result-card{padding:15px 16px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.025);display:flex;justify-content:space-between;align-items:center;gap:10px}
.result-card.primary{background:linear-gradient(145deg,rgba(126,231,183,.15),rgba(114,184,255,.07));border-color:rgba(126,231,183,.28)}
.result-card span{color:var(--muted);font-size:.76rem;display:block}
.result-card strong{font-size:clamp(1.1rem,2.2vw,1.4rem);letter-spacing:-.03em;display:block;margin-top:3px}
.result-card small{color:#7f92a7;font-size:.66rem;display:block;margin-top:4px;max-width:220px}
.result-icon{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:rgba(126,231,183,.1);color:var(--accent);flex:0 0 auto;font-size:1.05rem}

/* day-shape visual */
.day-shape{margin-bottom:16px}
.day-shape-legend{display:flex;gap:16px;font-size:.7rem;color:var(--muted);margin-bottom:8px}
.day-shape-legend span{display:inline-flex;align-items:center;gap:6px}
.day-shape-legend i{display:inline-block;width:9px;height:9px;border-radius:3px}
.legend-gen i{background:var(--warning)}
.legend-use i{background:var(--accent-2)}
.day-shape-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;align-items:end;height:120px;padding:0 2px}
.day-shape-col{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:4px}
.day-shape-bars{display:flex;gap:4px;align-items:flex-end;height:88px}
.day-bar{width:14px;border-radius:4px 4px 0 0;min-height:3px}
.day-bar.gen{background:var(--warning)}
.day-bar.use{background:var(--accent-2)}
.day-shape-col span{font-size:.62rem;color:#7f92a7;text-align:center}
.day-shape-note{color:var(--muted);font-size:.74rem;margin-top:8px}

.verdict{padding:16px 17px;background:var(--panel-2);border:1px solid var(--line);border-radius:14px;margin-bottom:14px}
.verdict h3{margin-bottom:6px;font-size:.98rem}
.verdict p{color:var(--muted);margin-bottom:0;font-size:.83rem}

.mistakes{border:1px solid rgba(255,210,128,.22);background:rgba(255,210,128,.05);border-radius:14px;padding:15px 16px;margin-bottom:14px}
.mistakes h3{font-size:.9rem;margin-bottom:8px;color:var(--text)}
.mistakes ul{margin:0;padding-left:18px;color:var(--muted);font-size:.78rem;line-height:1.6}
.mistakes li{margin-bottom:4px}

.crosslinks{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.crosslink-card{display:flex;justify-content:space-between;align-items:center;gap:10px;border:1px solid rgba(114,184,255,.26);border-radius:12px;padding:12px 14px;text-decoration:none;color:var(--text);background:rgba(114,184,255,.04)}
.crosslink-card:hover{border-color:rgba(114,184,255,.5)}
.crosslink-card strong{display:block;font-size:.84rem}
.crosslink-card small{color:var(--muted);font-size:.7rem}
.crosslink-card i{color:var(--accent-2);font-style:normal}

.disclaimer{margin-top:4px;padding:13px 15px;border:1px solid rgba(255,210,128,.28);background:rgba(255,210,128,.06);border-radius:12px;color:var(--muted);font-size:.76rem;line-height:1.5}
.disclaimer strong{color:var(--text)}

/* methodology / faq / version history, shared pattern */
.methodology-section{padding:10px 0 20px}
details.methodology{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:2px 0}
details.methodology summary{list-style:none;padding:18px 0;font-weight:750;cursor:pointer;position:relative}
details.methodology summary::-webkit-details-marker{display:none}
details.methodology summary::after{content:"+";position:absolute;right:2px;color:var(--muted);font-size:1.2rem}
details.methodology[open] summary::after{content:"–"}
.method-copy{color:var(--muted);font-size:.86rem;max-width:840px;padding-bottom:18px}
.method-copy p{margin:0 0 10px}
.method-copy p:last-child{margin-bottom:0}

.version-history-collapsed{width:min(1160px,calc(100% - 40px));margin:0 auto;padding:0 0 10px}
.version-history-collapsed details{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.version-history-collapsed summary{list-style:none;padding:16px 0;cursor:pointer;color:var(--muted);font-size:.86rem}
.version-history-collapsed summary::-webkit-details-marker{display:none}
.version-list{padding:4px 0 16px}
.version-list article{border-top:1px solid rgba(255,255,255,.07);padding:12px 0;display:grid;grid-template-columns:70px 1fr;gap:12px}
.version-list article span{color:var(--accent);font-size:.72rem;font-weight:800}
.version-list article strong{display:block;font-size:.86rem;margin-bottom:3px}
.version-list article p{color:var(--muted);font-size:.8rem;margin:0}

/* support considered, matching the rest of the site */
.support-considered{margin:10px 0 40px;padding:24px;border:1px solid rgba(126,231,183,.22);border-radius:18px;background:radial-gradient(circle at 85% 0%,rgba(126,231,183,.09),transparent 22rem),rgba(255,255,255,.02)}
.support-intro{max-width:820px;margin-bottom:18px}
.support-intro h2{font-size:clamp(1.4rem,2.6vw,1.9rem);margin:6px 0 8px}
.support-intro>p:last-child{color:var(--muted);margin-bottom:0}
.support-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:11px}
.support-card{display:grid;grid-template-columns:44px 1fr auto;gap:12px;align-items:center;min-width:0;padding:15px;border:1px solid rgba(255,255,255,.10);border-radius:12px;color:var(--text);text-decoration:none;transition:transform .18s ease,border-color .18s ease,filter .18s ease}
.support-card:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.24);filter:brightness(1.04)}
.support-card>span:nth-child(2){display:flex;flex-direction:column;min-width:0}
.support-card strong{font-size:.88rem}
.support-card small{color:rgba(255,255,255,.72);font-size:.69rem;margin-top:3px}
.support-card i{color:rgba(255,255,255,.75);font-style:normal}
.support-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;background:rgba(0,0,0,.16);font-size:1.2rem}
.support-kofi{background:linear-gradient(135deg,rgba(231,65,87,.85),rgba(190,42,75,.82))}
.support-octopus{background:linear-gradient(135deg,rgba(143,56,216,.80),rgba(89,46,170,.80))}
.support-youtube{background:linear-gradient(135deg,rgba(211,31,31,.82),rgba(128,15,15,.82))}
.support-member{background:linear-gradient(135deg,rgba(28,105,177,.82),rgba(18,61,118,.82))}
.support-disclosure{color:#8194a9;font-size:.69rem;margin:14px 0 0}

footer{width:min(1440px,calc(100% - 40px));margin:0 auto;padding:36px 0 56px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted)}
footer strong{color:var(--text);letter-spacing:.16em}
footer p{font-size:.82rem;margin-top:8px}
footer>div:last-child{display:flex;gap:22px;align-items:flex-start}
footer a{text-decoration:none;font-size:.82rem}
footer a:hover{color:var(--text)}

@media(max-width:1000px){
  .finder-shell{grid-template-columns:1fr}
  .results-panel{position:static}
}
@media(max-width:700px){
  .site-header{width:min(100% - 24px,1440px);height:70px}
  .site-header nav a:not(:last-child){display:none}
  .brand-logo{width:185px}
  main,footer,.version-history-collapsed{width:min(100% - 24px,1440px)}
  .breadcrumbs{display:none}
  .mobile-breadcrumbs{display:flex;padding-top:16px}
  .mobile-breadcrumbs a{color:var(--muted);text-decoration:none;font-size:.8rem}
  h1{font-size:2.4rem}
  .option-grid.cols-4{grid-template-columns:1fr 1fr}
  .option-grid.cols-3{grid-template-columns:1fr 1fr}
  .option-grid.cols-2{grid-template-columns:1fr}
  .checklist{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .meter-helper{grid-template-columns:1fr}
  .support-grid{grid-template-columns:1fr}
  .day-shape-grid{grid-template-columns:repeat(4,1fr)}
  footer{flex-direction:column;gap:20px}
}