:root {
  --ink: #eaf7f3;
  --muted: #a9c4bd;
  --paper: #07111f;
  --surface: #0d1c2b;
  --surface-2: #122638;
  --line: rgba(171, 226, 210, .17);
  --mint: #9fe8d1;
  --mint-strong: #56cfaa;
  --blue: #80bfff;
  --amber: #ffd38a;
  --danger: #ff9f9f;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 4%, rgba(38, 137, 120, .2), transparent 28rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}
a { color: inherit; }
img { max-width: 100%; }
.shell { width: min(calc(100% - 36px), var(--max)); margin-inline: auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 31, .92);
  backdrop-filter: blur(18px);
}
.site-nav { min-height: 74px; display: flex; align-items: center; gap: 22px; }
.site-logo img { display: block; width: 176px; }
.site-links { margin-left: auto; display: flex; align-items: center; gap: 20px; }
.site-links a { color: var(--muted); text-decoration: none; font-size: .92rem; font-weight: 650; }
.site-links a:hover, .site-links a[aria-current="page"] { color: var(--mint); }
.app-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid rgba(159, 232, 209, .42);
  border-radius: 999px;
  color: #06130f !important;
  background: var(--mint);
}
.content-hero { padding: 82px 0 46px; }
.breadcrumb { color: var(--mint); font-size: .82rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.content-hero h1 { max-width: 880px; margin: 16px 0 20px; font-size: clamp(2.45rem, 7vw, 5.3rem); line-height: 1.02; letter-spacing: -.055em; }
.content-hero p { max-width: 780px; margin: 0; color: var(--muted); font-size: clamp(1rem, 2.1vw, 1.25rem); }
.vehicle-directory-hero {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(360px, 1.08fr);
  gap: clamp(30px, 6vw, 74px);
  align-items: center;
}
.vehicle-directory-hero h1 { font-size: clamp(2.4rem, 5.3vw, 4.65rem); }
.editorial-figure {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--surface);
  box-shadow: 0 28px 90px rgba(0, 0, 0, .32);
}
.editorial-figure img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.editorial-figure figcaption { padding: 10px 16px 13px; color: var(--muted); font-size: .76rem; }
.meta-row { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 24px; color: #86a9a0; font-size: .86rem; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 48px; align-items: start; padding-bottom: 96px; }
.article-body { min-width: 0; }
.article-body > section { padding: 34px 0; border-top: 1px solid var(--line); }
.article-body h2 { margin: 0 0 14px; font-size: clamp(1.65rem, 3vw, 2.45rem); line-height: 1.15; letter-spacing: -.03em; }
.article-body h3 { margin: 28px 0 8px; color: var(--mint); font-size: 1.08rem; }
.article-body p, .article-body li { color: #c5d9d4; }
.article-body strong { color: #fff; }
.article-body ul, .article-body ol { padding-left: 22px; }
.article-body li + li { margin-top: 10px; }
.article-aside { position: sticky; top: 96px; display: grid; gap: 16px; }
.aside-card, .callout, .info-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(18, 38, 56, .92), rgba(10, 25, 38, .92));
  box-shadow: 0 18px 60px rgba(0, 0, 0, .16);
}
.aside-card { padding: 22px; }
.aside-card strong { display: block; margin-bottom: 10px; }
.aside-card a { display: block; padding: 8px 0; color: var(--muted); text-decoration: none; border-bottom: 1px solid rgba(171, 226, 210, .08); }
.aside-card a:last-child { border: 0; }
.aside-card a:hover { color: var(--mint); }
.callout { margin: 26px 0; padding: 22px 24px; border-left: 4px solid var(--mint-strong); }
.callout.warn { border-left-color: var(--amber); }
.callout p { margin: 0; }
.content-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.section-block { padding: 42px 0 76px; }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading h2 { margin: 8px 0 12px; font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.08; letter-spacing: -.04em; }
.section-heading p { margin: 0; color: var(--muted); }
.card-link { display: block; color: inherit; text-decoration: none; transition: transform .18s ease, border-color .18s ease; }
.card-link:hover { transform: translateY(-3px); border-color: rgba(159, 232, 209, .48); }
.card-link small { display: block; margin-top: 18px; color: var(--mint); font-weight: 800; }
.topic-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.topic-list a { padding: 22px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); text-decoration: none; }
.topic-list a strong { display: block; color: var(--ink); }
.topic-list a span { color: var(--muted); font-size: .9rem; }
.formula { overflow-x: auto; padding: 18px 20px; border: 1px dashed rgba(159,232,209,.38); border-radius: 16px; color: var(--mint); background: rgba(8,27,35,.75); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.notice { padding: 18px 20px; border-radius: 18px; background: rgba(128,191,255,.1); color: #cfe6ff; }
.pill-row { display:flex; flex-wrap:wrap; gap:10px; margin:20px 0; }
.pill-row span { padding:7px 12px; border:1px solid var(--line); border-radius:999px; color:var(--muted); font-size:.86rem; }
.info-card { padding: 24px; }
.info-card .icon { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 18px; border-radius: 14px; color: #07111f; background: var(--mint); font-weight: 900; }
.info-card h3 { margin: 0 0 8px; color: var(--ink); }
.info-card p { margin: 0; color: var(--muted); }
.vehicle-directory-grid { align-items: stretch; }
.model-card { position: relative; min-height: 290px; }
.model-card h2 { margin: 14px 0 8px; font-size: 1.65rem; }
.model-card-pending { border-style: dashed; }
.model-status {
  display: inline-flex;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.model-status.current { color: #06231a; background: var(--mint); border-color: var(--mint); }
.model-status.research { color: var(--amber); border-color: rgba(255, 211, 138, .32); }
.model-monogram {
  display: grid;
  place-items: center;
  width: 70px;
  height: 70px;
  margin-top: 24px;
  border: 1px solid rgba(159, 232, 209, .25);
  border-radius: 22px;
  color: var(--mint);
  background: radial-gradient(circle at 35% 25%, rgba(159, 232, 209, .22), rgba(18, 38, 56, .45));
  font-size: .86rem;
  font-weight: 900;
  letter-spacing: -.02em;
}
.vehicle-methodology .info-card { min-height: 250px; }
.source-note { margin-top: 14px !important; color: #8daea5 !important; font-size: .86rem; }
.comparison-wrap { overflow-x: auto; margin-inline: -2px; padding: 2px; }
.comparison { width: 100%; border-collapse: separate; border-spacing: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); }
.comparison th, .comparison td { padding: 15px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison th { color: var(--mint); background: var(--surface-2); }
.comparison tr:last-child td { border-bottom: 0; }
.tier-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin: 28px 0; }
.tier-card { position: relative; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: 26px; background: var(--surface); }
.tier-card.featured { border-color: rgba(159, 232, 209, .56); box-shadow: 0 20px 80px rgba(28, 158, 123, .16); }
.tier-card::after { content: ""; position: absolute; width: 150px; height: 150px; right: -70px; top: -70px; border-radius: 50%; background: rgba(159, 232, 209, .08); }
.tier-label { color: var(--mint); font-size: .78rem; font-weight: 900; letter-spacing: .12em; }
.tier-card h2 { margin: 8px 0 4px; }
.tier-card > p { min-height: 78px; color: var(--muted); }
.tier-card ul { padding: 0; list-style: none; }
.tier-card li { position: relative; padding-left: 24px; }
.tier-card li::before { content: "✓"; position: absolute; left: 0; color: var(--mint); font-weight: 900; }
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: flow; }
.flow > div { padding: 22px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); }
.flow > div::before { counter-increment: flow; content: "0" counter(flow); display: block; margin-bottom: 24px; color: var(--mint); font-size: .8rem; font-weight: 900; }
.faq details { border-top: 1px solid var(--line); padding: 18px 0; }
.faq summary { cursor: pointer; color: #eefbf7; font-weight: 750; }
.faq details p { margin-bottom: 0; }
.legal-index { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.legal-index a { padding: 22px; border: 1px solid var(--line); border-radius: 20px; text-decoration: none; background: var(--surface); }
.legal-index a strong { display: block; color: var(--mint); }
.legal-index a span { color: var(--muted); font-size: .9rem; }
.site-footer { border-top: 1px solid var(--line); padding: 42px 0; background: #050d17; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 30px; }
.footer-grid img { width: 180px; }
.footer-grid p, .footer-grid small { color: var(--muted); }
.footer-links { display: grid; gap: 8px; }
.footer-links strong { margin-bottom: 4px; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--mint); }
.footer-bottom { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--line); color: #76958d; font-size: .83rem; }
.calculator-shell { display:grid; grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr); gap:28px; align-items:start; padding-bottom:72px; }
.calculator-panel, .calculator-results { border:1px solid var(--line); border-radius:28px; background:linear-gradient(145deg,rgba(18,38,56,.96),rgba(8,23,35,.96)); box-shadow:0 24px 80px rgba(0,0,0,.2); }
.calculator-panel { padding:clamp(22px,4vw,38px); }
.calculator-form { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px; }
.calculator-form label { display:grid; gap:7px; color:var(--ink); font-weight:750; font-size:.92rem; }
.calculator-form label span { color:var(--muted); font-size:.76rem; font-weight:600; }
.calculator-form input { width:100%; min-height:48px; padding:10px 13px; border:1px solid var(--line); border-radius:12px; color:var(--ink); background:#071521; font:inherit; }
.calculator-form input:focus { outline:2px solid var(--mint-strong); outline-offset:2px; }
.calculator-form button { grid-column:1/-1; min-height:50px; border:0; border-radius:999px; color:#06130f; background:var(--mint); font:inherit; font-weight:850; cursor:pointer; }
.calculator-privacy { margin:18px 0 0; color:var(--muted); font-size:.82rem; }
.calculator-results { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:1px; overflow:hidden; position:sticky; top:96px; }
.result-card { min-height:150px; padding:24px; background:rgba(7,17,31,.72); }
.result-card span { display:block; min-height:48px; color:var(--muted); font-size:.84rem; }
.result-card strong { display:inline-block; margin-top:10px; color:var(--mint); font-size:clamp(2rem,5vw,3.4rem); line-height:1; }
.result-card small { margin-left:5px; color:var(--muted); }
.calculator-results .callout { grid-column:1/-1; margin:0; border-width:0 0 0 4px; border-radius:0; box-shadow:none; }
.calculator-method { padding-top:20px; }

@media (max-width: 900px) {
  .site-links a:not(.app-link) { display: none; }
  .article-layout { grid-template-columns: 1fr; }
  .article-aside { position: static; grid-row: 1; }
  .content-grid, .tier-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .vehicle-directory-hero { grid-template-columns: 1fr; }
  .calculator-shell { grid-template-columns:1fr; }
  .calculator-results { position:static; }
}
@media (max-width: 580px) {
  .shell { width: min(calc(100% - 24px), var(--max)); }
  .site-nav { min-height: 64px; }
  .site-logo img { width: 145px; }
  .app-link { min-height: 40px; padding: 0 13px; font-size: .82rem; }
  .content-hero { padding-top: 58px; }
  .flow, .legal-index, .footer-grid, .topic-list { grid-template-columns: 1fr; }
  .comparison { display: block; overflow-x: auto; }
  .calculator-form, .calculator-results { grid-template-columns:1fr; }
  .calculator-results .callout { grid-column:1; }
}

/* Final light-theme overrides sit last so legacy article rules cannot win. */
:root{--ink:#07111f;--muted:#5f7183;--paper:#f7fafc;--surface:#fff;--surface-2:#edf5fb;--line:rgba(25,72,109,.14);--mint:#0d8d70;--mint-strong:#08765e;--blue:#176fd1;--amber:#a85e00;--danger:#bd2f38}
body{color:var(--ink);background:radial-gradient(circle at 82% 4%,rgba(35,133,212,.09),transparent 28rem),var(--paper)}
.site-header{background:rgba(255,255,255,.94)}
.site-logo img,.site-footer img{content:url("/brand/rotanergy-logo-electric-light.png")}
.site-links a:hover,.site-links a[aria-current="page"]{color:var(--blue)}
.app-link{color:#fff!important;background:var(--blue);border-color:var(--blue)}
.article-body p,.article-body li{color:#40576c}.article-body strong,.faq summary{color:var(--ink)}
.aside-card,.callout,.info-card{background:#fff;box-shadow:0 18px 54px rgba(25,72,109,.08)}
.formula{color:#075e82;background:#edf7fb;border-color:rgba(7,94,130,.24)}
.notice{color:#174d75;background:#eaf4ff}.source-note{color:#607789!important}
.model-status.research{color:#8a4c00}.model-monogram{color:#075e82;background:linear-gradient(145deg,#effafa,#e9f2ff)}
.tier-card.featured{box-shadow:0 20px 65px rgba(28,113,158,.13)}
.site-footer{background:#edf3f8}.footer-bottom{color:#5f7183}
.editorial-disclosure{display:flex;gap:16px;align-items:flex-start;margin:0 0 30px;padding:18px 20px;border:1px solid #cfe0ec;border-radius:18px;background:#f4f9fc}.editorial-disclosure p{margin:6px 0 0;color:#53697b;font-size:14px;line-height:1.6}.editorial-avatar{display:grid;place-items:center;flex:0 0 44px;height:44px;border-radius:14px;background:#07111f;color:#9cebcf;font:800 20px 'Space Grotesk',sans-serif}.editorial-method{margin-top:34px;padding:22px 24px;border-left:5px solid #1d72f2;border-radius:16px;background:#edf5ff}.editorial-method h2{margin-top:0}.editorial-method p{margin-bottom:0}
.calculator-panel,.calculator-results{background:#fff;box-shadow:0 18px 54px rgba(25,72,109,.1)}.calculator-form input{color:var(--ink);background:#f8fbfd}.result-card{background:#f7fafc}.calculator-form button{color:#fff;background:var(--blue)}