:root {
  color-scheme: dark;
  --bg: #10141c;
  --bg-soft: #151b26;
  --panel: #191f2a;
  --panel-raised: #1d2532;
  --line: #2a3443;
  --text: #f0f3f8;
  --muted: #9da8b8;
  --subtle: #748195;
  --blue: #58d5ff;
  --green: #66e5ae;
  --red: #ff8f91;
  --shadow: 0 24px 70px #03070e55;
  --radius: 18px;
  font-family: "DM Sans", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f8fc;
  --bg-soft: #edf2f8;
  --panel: #fff;
  --panel-raised: #f6f9fc;
  --line: #dce5ef;
  --text: #162131;
  --muted: #58677b;
  --subtle: #75849a;
  --blue: #087da8;
  --green: #05865b;
  --red: #b52838;
  --shadow: 0 24px 70px #18365614;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 85px; }
body { margin: 0; min-width: 320px; background: var(--bg); color: var(--text); line-height: 1.6; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.skip-link { position: absolute; z-index: 20; left: 12px; top: -60px; padding: 10px 14px; border-radius: 8px; background: var(--blue); color: #06111b; font-weight: 700; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; z-index: 10; top: 0; border-bottom: 1px solid color-mix(in srgb, var(--line), transparent 35%); background: color-mix(in srgb, var(--bg), transparent 7%); backdrop-filter: blur(18px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: Manrope, sans-serif; font-size: 19px; font-weight: 800; letter-spacing: -.7px; white-space: nowrap; }
.brand-mark { display: grid; width: 32px; height: 32px; place-items: center; border-radius: 10px; background: #193041; color: var(--blue); font-size: 17px; }
.brand-accent { color: var(--blue); }
.main-nav { display: flex; align-items: center; gap: clamp(14px, 2.7vw, 34px); }
.main-nav a, .site-footer nav a { color: var(--muted); font-size: 13px; font-weight: 600; text-decoration: none; transition: color .18s ease; }
.main-nav a:hover, .site-footer nav a:hover { color: var(--blue); }
.theme-toggle { display: inline-flex; align-items: center; gap: 7px; border: 1px solid var(--line); border-radius: 10px; padding: 8px 11px; background: var(--panel); color: var(--muted); cursor: pointer; font-size: 12px; }
.hero { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; min-height: 525px; padding-block: 74px 63px; }
.hero::before { position: absolute; top: 4%; left: -12%; width: 55%; height: 76%; background: radial-gradient(ellipse, #1d6b8c20, transparent 67%); content: ""; pointer-events: none; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow { margin: 0 0 13px; color: var(--blue); font-size: 11px; font-weight: 700; letter-spacing: 1.4px; text-transform: uppercase; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px #66e5ae99; }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3, h4 { font-family: Manrope, "Segoe UI", sans-serif; letter-spacing: -.04em; }
h1 { margin-bottom: 22px; font-size: clamp(43px, 6.4vw, 70px); line-height: 1.09; font-weight: 800; }
.gradient-text { background: linear-gradient(95deg, var(--blue), var(--green)); color: transparent; background-clip: text; }
.hero-lead { max-width: 530px; margin-bottom: 26px; color: var(--muted); font-size: 16px; }
.hero-actions { display: flex; align-items: center; gap: 23px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 44px; padding: 11px 16px; border: 1px solid transparent; border-radius: 10px; cursor: pointer; font-size: 13px; font-weight: 700; text-decoration: none; transition: transform .18s ease, background .18s ease, border-color .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: linear-gradient(110deg, #40c4ef, #6be4b2); color: #0a1620; }
.button-outline { border-color: var(--line); background: var(--panel); color: var(--text); }
.button-outline:hover { border-color: var(--blue); }
.button-quiet { border-color: var(--line); background: transparent; color: var(--muted); }
.text-link { color: var(--text); font-size: 13px; font-weight: 700; text-decoration: none; }
.text-link:hover { color: var(--blue); }
.hero-note { margin: 21px 0 0; color: var(--subtle); font-size: 11px; }
.hero-visual { position: relative; display: grid; min-height: 330px; place-items: center; overflow: hidden; }
.orbit { position: absolute; width: 315px; aspect-ratio: 1; border: 1px solid #58d5ff17; border-radius: 50%; }
.orbit::before, .orbit::after { position: absolute; border: 1px solid #58d5ff12; border-radius: 50%; content: ""; }
.orbit::before { inset: 30px; }.orbit::after { inset: 65px; }
.orbit-two { transform: scaleX(.58) rotate(45deg); }
.energy-card { position: relative; z-index: 1; width: min(300px, 88%); padding: 23px; border: 1px solid #344353; border-radius: 18px; background: linear-gradient(145deg, #1c2835, #171d28 65%); box-shadow: var(--shadow); transform: rotate(-2deg); }
.energy-card-top, .energy-card-foot { display: flex; align-items: center; justify-content: space-between; color: #95a5b6; font-size: 9px; font-weight: 700; letter-spacing: 1.1px; }
.pulse-icon { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 9px; background: #58d5ff1c; color: var(--blue); font-size: 17px; }
.energy-card strong { display: block; margin-top: 17px; font-family: Manrope, sans-serif; font-size: 23px; line-height: 1.25; letter-spacing: -.7px; }
.energy-bars { display: flex; align-items: end; gap: 6px; height: 78px; margin: 20px 0 14px; }
.energy-bars i { flex: 1; min-height: 9px; border-radius: 5px 5px 2px 2px; background: linear-gradient(0deg, #46bee8, #67e0ba); opacity: .8; }
.energy-bars i:nth-child(3n+1) { height: 35%; }.energy-bars i:nth-child(3n+2) { height: 70%; }.energy-bars i:nth-child(3n) { height: 50%; }.energy-bars i:nth-child(5) { height: 92%; }
.energy-card-foot { padding-top: 11px; border-top: 1px solid #ffffff12; font-size: 9px; letter-spacing: 0; }
.float-tag { position: absolute; z-index: 2; display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); box-shadow: var(--shadow); font-size: 14px; font-weight: 800; }
.tag-blue { top: 18%; left: 10%; color: var(--blue); transform: rotate(-9deg); }.tag-green { right: 9%; bottom: 20%; color: var(--green); transform: rotate(9deg); }
.trust-strip { display: flex; justify-content: space-around; gap: 16px; padding: 21px 10px; border-block: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.trust-strip>div { display: flex; align-items: center; gap: 9px; }.trust-icon { color: var(--green); font-size: 17px; }
.section { padding-block: 91px; }
.section-muted { background: var(--bg-soft); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 27px; }
.section-heading h2 { margin: 0; font-size: clamp(27px, 4vw, 38px); line-height: 1.2; }
.section-heading>p { max-width: 385px; margin: 0 0 3px; color: var(--muted); font-size: 13px; }
.calculator-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 18px; align-items: stretch; }
.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.calculator-form { padding: clamp(20px, 3vw, 29px); }
.panel-title { display: flex; align-items: center; gap: 13px; margin-bottom: 23px; }
.panel-title h3 { margin: 0 0 2px; font-size: 17px; letter-spacing: -.4px; }
.panel-title p { margin: 0; color: var(--muted); font-size: 11px; }
.step-number { display: grid; width: 38px; height: 38px; flex: 0 0 38px; place-items: center; border: 1px solid #58d5ff38; border-radius: 12px; background: #58d5ff12; color: var(--blue); font-size: 11px; font-weight: 800; }
label { display: block; margin-bottom: 7px; color: var(--text); font-size: 11px; font-weight: 700; }
.optional, .unit { margin-left: 5px; color: var(--subtle); font-size: 10px; font-weight: 400; }
.input-wrap { display: flex; align-items: center; height: 43px; border: 1px solid var(--line); border-radius: 9px; background: var(--bg); transition: border-color .2s ease; }
.input-wrap:focus-within { border-color: var(--blue); }
.input-wrap input { width: 100%; min-width: 0; height: 100%; padding: 0 12px; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 13px; }
.input-wrap input:focus-visible { outline: 0; }
.input-wrap>span { padding: 0 11px; color: var(--subtle); font-size: 10px; white-space: nowrap; }
.calculator-form>input, .compare-card>input { width: 100%; height: 43px; margin-bottom: 14px; padding: 0 12px; border: 1px solid var(--line); border-radius: 9px; background: var(--bg); color: var(--text); font-size: 13px; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; margin-bottom: 14px; }
.price-input { max-width: 100%; }
.field-error { min-height: 18px; margin: 7px 0 0; color: var(--red); font-size: 11px; }
.formula-details { margin-top: 12px; padding: 12px 13px; border: 1px solid var(--line); border-radius: 9px; color: var(--muted); font-size: 11px; }
.formula-details summary { color: var(--text); font-weight: 700; cursor: pointer; }.formula-details p { margin: 10px 0 0; }
.form-actions { display: flex; gap: 9px; margin-top: 17px; flex-wrap: wrap; }.form-actions .button { min-height: 39px; padding: 9px 12px; font-size: 11px; }
.privacy-hint { margin: 9px 0 0; color: var(--subtle); font-size: 10px; }
.results-panel { display: flex; flex-direction: column; padding: clamp(20px, 3vw, 29px); background: linear-gradient(145deg, var(--panel), color-mix(in srgb, var(--panel), #11293a 35%)); }
.results-heading { display: flex; align-items: start; justify-content: space-between; gap: 12px; }
.results-heading .eyebrow { margin-bottom: 5px; font-size: 9px; }.results-heading h3 { margin: 0; font-size: 17px; overflow-wrap: anywhere; }
.result-badge { border: 1px solid #66e5ae36; border-radius: 20px; padding: 5px 8px; color: var(--green); font-size: 9px; white-space: nowrap; }
.primary-result { display: flex; align-items: end; justify-content: space-between; gap: 15px; margin: 25px 0 17px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.primary-result div>span, .period-results span { display: block; color: var(--muted); font-size: 10px; }
.primary-result strong { display: block; margin-top: 4px; color: var(--green); font-family: Manrope, sans-serif; font-size: clamp(27px, 4vw, 40px); line-height: 1.1; letter-spacing: -1.5px; }
.primary-result .result-kwh { text-align: right; }.primary-result .result-kwh strong { color: var(--text); font-size: 18px; letter-spacing: -.4px; }
.period-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.period-results>div { min-width: 0; padding: 10px; border: 1px solid var(--line); border-radius: 9px; background: color-mix(in srgb, var(--panel), var(--bg) 35%); }
.period-results span { font-size: 9px; }.period-results strong { display: block; margin-top: 5px; font-size: 13px; }
.chart-block { margin-top: auto; padding-top: 22px; }.chart-heading { display: flex; justify-content: space-between; align-items: center; }.chart-heading h4 { margin: 0; font-size: 11px; letter-spacing: 0; }.chart-heading span { color: var(--subtle); font-size: 10px; }
.cost-chart { display: grid; grid-template-columns: repeat(4, 1fr); align-items: end; gap: 16px; height: 84px; margin-top: 12px; padding: 0 8px; border-bottom: 1px solid var(--line); }
.chart-column { display: flex; height: 100%; align-items: center; justify-content: end; flex-direction: column; gap: 3px; }.chart-bar { display: block; width: min(34px, 70%); min-height: 2px; border-radius: 5px 5px 0 0; background: #48bde4; transition: height .2s ease; }.chart-bar-highlight { background: linear-gradient(#68e2b2, #35b8e3); }
.chart-value { color: var(--muted); font-size: 8px; }.chart-labels { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 6px; text-align: center; color: var(--subtle); font-size: 9px; }
.result-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 17px; padding-top: 13px; border-top: 1px solid var(--line); }
.text-button { padding: 0; border: 0; background: none; color: var(--blue); cursor: pointer; font-size: 10px; font-weight: 700; }.text-button:hover { text-decoration: underline; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; clip-path: inset(50%); }
.compare-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }.compare-toolbar p { margin: 0; color: var(--muted); font-size: 11px; }.compare-toolbar .button { min-height: 39px; }
.comparison-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.compare-card { position: relative; padding: 17px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }.compare-card.invalid { border-color: var(--red); }
.compare-card-head { display: flex; justify-content: space-between; align-items: center; }.compare-card-head label { color: var(--muted); }.remove-device { width: 27px; height: 27px; border: 1px solid var(--line); border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; font-size: 18px; line-height: 1; }.remove-device:hover { color: var(--red); }
.compare-card>input { height: 37px; margin-bottom: 11px; }.compare-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }.compare-fields label { margin: 0; color: var(--subtle); font-size: 9px; }.compare-fields input { display: block; width: 100%; height: 34px; margin-top: 5px; padding: 0 8px; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); color: var(--text); font-size: 11px; }
.compare-cost { margin-top: 14px; padding-top: 11px; border-top: 1px solid var(--line); }.compare-cost span, .compare-cost small { display: block; color: var(--muted); font-size: 9px; }.compare-cost strong { display: block; margin: 3px 0; color: var(--green); font-family: Manrope,sans-serif; font-size: 18px; }.compare-cost small { color: var(--subtle); }
.compare-summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 15px; padding: 17px 19px; }.compare-summary div span { display: block; color: var(--muted); font-size: 10px; }.compare-summary div strong { font-size: 14px; }.compare-summary p { max-width: 460px; margin: 0; color: var(--muted); font-size: 11px; }
.compare-footnote { margin: 12px 0 0; color: var(--subtle); font-size: 10px; }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.guide-card { position: relative; min-height: 191px; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); text-decoration: none; transition: transform .2s ease, border-color .2s ease; }.guide-card:hover { transform: translateY(-3px); border-color: #58d5ff75; }
.guide-index { color: var(--blue); font-size: 9px; font-weight: 700; letter-spacing: 1px; }.guide-card h3 { max-width: 280px; margin: 11px 0 7px; font-size: 16px; line-height: 1.35; letter-spacing: -.4px; }.guide-card p { margin: 0; color: var(--muted); font-size: 11px; }.guide-arrow { position: absolute; top: 17px; right: 17px; color: var(--subtle); }
.simulator-callout { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 70px; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(110deg, var(--panel), var(--bg-soft)); }.simulator-callout h2 { margin-bottom: 7px; font-size: 24px; }.simulator-callout p:last-child { margin: 0; color: var(--muted); font-size: 12px; }
.site-footer { border-top: 1px solid var(--line); background: var(--bg-soft); }.footer-main { display: flex; align-items: center; gap: 24px; padding-block: 27px; }.footer-main>p { flex: 1; margin: 0; color: var(--subtle); font-size: 10px; }.site-footer nav { display: flex; gap: 15px; flex-wrap: wrap; }.site-footer nav a { font-size: 10px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 14px; padding-block: 13px 20px; border-top: 1px solid var(--line); color: var(--subtle); font-size: 9px; }

/* Content pages */
.content-main { min-height: 65vh; padding-block: 68px 90px; }.breadcrumbs { margin-bottom: 27px; color: var(--subtle); font-size: 11px; }.breadcrumbs a { color: var(--muted); text-decoration: none; }.article { max-width: 780px; }.article h1 { margin-bottom: 15px; font-size: clamp(35px, 5vw, 52px); }.article .lead { color: var(--muted); font-size: 17px; }.article h2 { margin: 39px 0 12px; font-size: 25px; }.article h3 { margin: 25px 0 8px; font-size: 18px; }.article p, .article li { color: var(--muted); font-size: 15px; }.article strong { color: var(--text); }.article a { color: var(--blue); }.article ul, .article ol { padding-left: 22px; }.article li { padding-left: 4px; margin: 7px 0; }.callout { margin: 22px 0; padding: 16px 18px; border-left: 3px solid var(--green); border-radius: 0 10px 10px 0; background: var(--panel); color: var(--muted); font-size: 13px; }.content-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }.content-card { display: block; padding: 17px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); text-decoration: none; }.content-card strong { display: block; margin-bottom: 4px; color: var(--text); }.content-card span { color: var(--muted); font-size: 12px; }
.simulator-form { max-width: 720px; margin-top: 28px; padding: 22px; }.simulator-form .field-grid { margin-block: 14px; }.sim-result { margin-top: 16px; padding: 19px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel-raised); }.sim-result strong { color: var(--green); font-size: 25px; }.sim-result p { margin: 6px 0 0; font-size: 12px; }
@media (max-width: 820px) {
  .main-nav { gap: 13px; }.main-nav a { font-size: 11px; }.theme-label { display: none; }.theme-toggle { width: 36px; height: 36px; justify-content: center; padding: 0; font-size: 16px; }
  .hero { min-height: 440px; }.hero-visual { min-height: 280px; }.calculator-layout { grid-template-columns: 1fr 1fr; }.comparison-grid { grid-template-columns: repeat(2, 1fr); }.guide-grid { grid-template-columns: repeat(2, 1fr); }.footer-main { flex-wrap: wrap; }
}
@media (max-width: 620px) {
  .shell { width: min(100% - 32px, 480px); }.header-inner { min-height: 63px; gap: 8px; }.brand { gap: 7px; font-size: 16px; }.brand-mark { width: 29px; height: 29px; }
  .main-nav { gap: 10px; }.main-nav a { font-size: 10px; }.main-nav a:nth-child(3) { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 54px 27px; }.hero h1 { font-size: clamp(43px, 13vw, 60px); }.hero-lead { font-size: 14px; }.hero-visual { min-height: 270px; margin-top: 8px; }
  .trust-strip { justify-content: flex-start; overflow-x: auto; padding-inline: 0; }.trust-strip>div { flex: 0 0 auto; font-size: 10px; }.trust-icon { font-size: 14px; }
  .section { padding-block: 62px; }.section-heading { display: block; }.section-heading>p { margin-top: 12px; font-size: 12px; }.section-heading h2 { font-size: 29px; }
  .calculator-layout { grid-template-columns: 1fr; }.calculator-form, .results-panel { padding: 19px; }.primary-result strong { font-size: 33px; }.period-results { gap: 6px; }.period-results>div { padding: 8px 6px; }.period-results strong { font-size: 11px; }.period-results span { font-size: 8px; }
  .comparison-grid, .guide-grid { grid-template-columns: 1fr; }.compare-toolbar { align-items: flex-start; flex-direction: column; }.compare-summary { align-items: flex-start; flex-direction: column; gap: 7px; }
  .simulator-callout { align-items: flex-start; flex-direction: column; padding: 21px; }.simulator-callout h2 { font-size: 21px; }.footer-main { align-items: flex-start; flex-direction: column; gap: 10px; }.site-footer nav { gap: 12px; }.footer-bottom { flex-direction: column; gap: 3px; }
  .content-main { padding-block: 43px 65px; }.article .lead { font-size: 15px; }.article p, .article li { font-size: 14px; }.content-card-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }