:root{--navy:#071a33;--navy2:#0d2c51;--ink:#10213a;--muted:#607086;--sun:#ffc84a;--orange:#ff8a24;--green:#16835f;--mint:#e2f8ef;--paper:#f4f8fb;--surface:#fff;--surface-2:#eef4f9;--frost:rgba(255,255,255,.8);--line:rgba(7,26,51,.12);--shadow:0 25px 80px rgba(7,26,51,.14);--ease:cubic-bezier(.22,1,.36,1);color-scheme:light}
@media (prefers-reduced-motion:no-preference){body,section,article,aside,.contact-card,.stat,.list-card,.guide-link{transition:background-color .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease)}}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"DM Sans",system-ui,sans-serif;line-height:1.55}button,input,select{font:inherit}a{color:inherit}img{max-width:100%;display:block}::selection{background:var(--sun);color:var(--navy)}:focus-visible{outline:3px solid var(--sun);outline-offset:3px}.shell{width:min(1160px,calc(100% - 40px));margin-inline:auto}h1,h2,h3{font-family:"Manrope",sans-serif;letter-spacing:-.045em;line-height:1.04;margin:0}.button{display:inline-flex;align-items:center;justify-content:center;padding:13px 18px;border:0;border-radius:14px;background:var(--sun);color:var(--navy);font-weight:800;text-decoration:none;cursor:pointer}.eyebrow{display:flex;align-items:center;gap:9px;color:var(--green);font-size:.74rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.eyebrow::before{content:"";width:25px;height:2px;border-radius:99px;background:currentColor}
.topline{background:var(--green);color:#fff;text-align:center;padding:8px 16px;font-size:.68rem;font-weight:800;letter-spacing:.035em}.topline b{color:#fff0a8}.nav-wrap{position:sticky;top:0;z-index:30;padding:12px 0;background:rgba(244,248,251,.78);backdrop-filter:blur(16px)}.nav{height:64px;display:flex;align-items:center;gap:20px;padding:0 14px 0 17px;border-radius:19px;background:rgba(7,26,51,.9);color:#fff;box-shadow:0 14px 40px rgba(7,26,51,.18)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:"Manrope",sans-serif;font-weight:800}.brand em{font-style:normal;color:var(--sun)}.mark{width:35px;height:35px;border-radius:11px;background:linear-gradient(145deg,var(--sun) 0 44%,#1f79bd 45% 72%,var(--green) 73%);border:1px solid rgba(255,255,255,.35)}.nav-links{margin-left:auto;display:flex;gap:20px;align-items:center}.nav-links a{font-size:.8rem;text-decoration:none;color:#ccdae7;font-weight:700}.nav .button{padding:11px 15px}
.guide-hero{padding:58px 0 48px}.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}.hero-copy h1{font-size:clamp(2.8rem,6vw,5.6rem);max-width:11ch;margin-top:13px}.hero-copy .lede{font-size:1.12rem;color:var(--muted);max-width:58ch;margin:20px 0 0}.hindi-summary{margin:18px 0 0;padding:13px 15px;border-left:4px solid var(--orange);background:var(--surface);border-radius:0 14px 14px 0;color:#42566e;font-size:.84rem}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.hero-actions .secondary{background:var(--surface);border:1px solid var(--line)}.hero-media{position:relative;height:510px;border-radius:30px;overflow:hidden;box-shadow:var(--shadow)}.hero-media img{width:100%;height:100%;object-fit:cover}.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(7,26,51,.55),transparent 55%)}.image-note{position:absolute;left:20px;right:20px;bottom:20px;z-index:1;padding:13px 15px;border-radius:14px;background:rgba(7,26,51,.76);backdrop-filter:blur(12px);color:#fff;font-size:.76rem}
.stats{padding:0 0 42px}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.stat{padding:22px;border:1px solid var(--line);border-radius:20px;background:var(--surface)}.stat strong{display:block;font:800 1.6rem/1.1 "Manrope",sans-serif;color:var(--navy)}.stat span{display:block;margin-top:7px;color:var(--muted);font-size:.76rem}
.section{padding:82px 0}.section.white{background:var(--surface)}.section.dark{background:var(--navy);color:#fff}.section h2{font-size:clamp(2.25rem,4.5vw,4rem);max-width:13ch}.section .intro{max-width:65ch;color:var(--muted);font-size:1.02rem}.dark .intro{color:#afc1d4}.answer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:34px}.answer{padding:25px;border:1px solid var(--line);border-radius:22px;background:var(--paper)}.answer .n{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:var(--mint);color:var(--green);font-weight:900}.answer h3{font-size:1.2rem;margin-top:18px}.answer p{font-size:.84rem;color:var(--muted);margin:9px 0 0}.answer strong{display:block;margin-top:16px;color:var(--green);font-size:.85rem}
.spec-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start}.sticky-copy{position:sticky;top:110px}.list-columns{display:grid;grid-template-columns:1fr 1fr;gap:14px}.list-card{padding:24px;border-radius:22px;background:var(--surface);border:1px solid var(--line)}.list-card h3{font-size:1.2rem}.list-card ul{padding:0;margin:18px 0 0;list-style:none;display:grid;gap:12px}.list-card li{position:relative;padding-left:24px;color:var(--muted);font-size:.84rem}.list-card.good li::before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:900}.list-card.watch li::before{content:"!";position:absolute;left:3px;color:var(--orange);font-weight:900}.spec-table{grid-column:1/-1;margin-top:0;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--surface)}.spec-row{display:grid;grid-template-columns:.72fr 1.28fr;gap:16px;padding:15px 18px;border-top:1px solid var(--line);font-size:.82rem}.spec-row:first-child{border-top:0}.spec-row b{color:var(--muted)}
.calc-shell{display:grid;grid-template-columns:.72fr 1.28fr;gap:0;margin-top:34px;border-radius:28px;overflow:hidden;background:var(--surface);color:var(--ink);box-shadow:0 24px 70px rgba(0,0,0,.2)}.calc-inputs{padding:30px}.calc-results{padding:30px;background:linear-gradient(145deg,#0b2a4d,#071a33);color:#fff}.input-grid{display:grid;gap:17px}.control label{display:flex;justify-content:space-between;gap:15px;font-size:.76rem;font-weight:800;margin-bottom:7px}.control input,.control select{width:100%;border:1px solid var(--line);background:var(--surface);border-radius:13px;padding:12px;color:var(--ink);outline:0}.calc-note{font-size:.7rem;color:var(--muted);margin:17px 0 0}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.result{padding:17px;border-radius:16px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.075)}.result span{display:block;color:#a9bdd2;font-size:.7rem}.result strong{display:block;margin-top:5px;font:800 1.5rem/1.1 "Manrope",sans-serif;color:#fff}.result.accent strong{color:var(--sun)}.result-wide{grid-column:1/-1}.calc-results p{font-size:.76rem;color:#aec1d4}.progress{height:10px;border-radius:99px;background:rgba(255,255,255,.12);overflow:hidden;margin-top:18px}.progress i{display:block;height:100%;width:60%;border-radius:inherit;background:linear-gradient(90deg,var(--green),var(--sun));transition:width .4s var(--ease)}
.battery-planner[hidden],.solar-planner[hidden]{display:none}.battery-comparison{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:32px}.battery-card{padding:22px;border-radius:20px;border:1px solid var(--line);background:var(--surface)}.battery-card h3{font-size:1.15rem}.battery-card p{font-size:.8rem;color:var(--muted)}.battery-card b{color:var(--green);font-size:.78rem}
.source-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:28px}.source-grid a{padding:17px;border-radius:16px;background:rgba(255,255,255,.075);border:1px solid rgba(255,255,255,.14);text-decoration:none;color:#d6e2ee;font-size:.78rem;font-weight:700}.source-grid a:hover{background:rgba(255,255,255,.13)}
.more-guides{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px}.guide-link{padding:20px;border-radius:19px;background:var(--surface);border:1px solid var(--line);text-decoration:none;transition:.25s var(--ease)}.guide-link:hover{transform:translateY(-4px);box-shadow:0 14px 40px rgba(7,26,51,.1)}.guide-link span{display:block;color:var(--green);font-size:.67rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em}.guide-link b{display:block;margin-top:7px;font-family:"Manrope",sans-serif}.guide-link.current{background:var(--navy);color:#fff}.guide-link.current span{color:var(--sun)}
.cta{padding:40px 0 90px}.cta-box{padding:45px;border-radius:28px;background:linear-gradient(135deg,var(--orange),var(--sun));display:grid;grid-template-columns:1fr auto;gap:25px;align-items:center}.cta-box h2{font-size:clamp(2rem,4vw,3.6rem);max-width:13ch}.cta-box p{margin:10px 0 0;max-width:60ch}.cta-box .button{background:var(--navy);color:#fff}.footer{padding:36px 0 100px;background:#06152a;color:#9fb2c8}.footer-row{display:flex;justify-content:space-between;gap:30px}.footer p{font-size:.72rem;max-width:75ch}.footer a{color:#fff}
@media(max-width:850px){.hero-grid,.spec-layout,.calc-shell{grid-template-columns:1fr}.hero-media{height:390px}.sticky-copy{position:relative;top:auto}.answer-grid,.more-guides{grid-template-columns:1fr 1fr}.battery-comparison{grid-template-columns:1fr}.cta-box{grid-template-columns:1fr}.source-grid{grid-template-columns:1fr}}
@media(max-width:600px){.shell{width:min(100% - 24px,1160px)}.nav-links{display:none}.nav .button{margin-left:auto;padding:10px 12px;font-size:.75rem}.guide-hero{padding-top:34px}.hero-copy h1{font-size:3.1rem}.hero-media{height:300px;border-radius:22px}.stat-grid,.answer-grid,.list-columns,.more-guides{grid-template-columns:1fr}.section{padding:62px 0}.calc-inputs,.calc-results{padding:21px 17px}.result-grid{grid-template-columns:1fr}.result-wide{grid-column:auto}.cta-box{padding:26px}.footer-row{display:block}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.guide-link,.hero-media img{transition:none!important}}

:root[data-theme="dark"]{--navy:#04101d;--navy2:#0a2136;--ink:#e9f1f9;--muted:#9bafc4;--mint:#10382d;--green:#3ed49d;--paper:#060f1b;--surface:#0e2135;--surface-2:#132a41;--frost:rgba(255,255,255,.055);--line:rgba(255,255,255,.13);--shadow:0 25px 80px rgba(0,0,0,.55);color-scheme:dark}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){--navy:#04101d;--navy2:#0a2136;--ink:#e9f1f9;--muted:#9bafc4;--mint:#10382d;--green:#3ed49d;--paper:#060f1b;--surface:#0e2135;--surface-2:#132a41;--frost:rgba(255,255,255,.055);--line:rgba(255,255,255,.13);--shadow:0 25px 80px rgba(0,0,0,.55);color-scheme:dark}}
:root[data-theme="dark"] .section.white,:root[data-theme="dark"] .nav-wrap{background:var(--surface)}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]) .section.white,:root:not([data-theme="light"]) .nav-wrap{background:var(--surface)}}
:root[data-theme="dark"] .hindi-summary{color:#c3d3e3}
.theme-toggle{width:36px;height:36px;flex:0 0 auto;display:grid;place-items:center;padding:0;border:1px solid rgba(255,255,255,.16);border-radius:11px;background:rgba(255,255,255,.1);cursor:pointer;transition:.25s var(--ease)}
.theme-toggle:hover{background:rgba(255,255,255,.2)}
.theme-ico{grid-area:1/1;width:16px;height:16px;transition:.3s var(--ease)}
.theme-ico-sun{border-radius:50%;background:var(--sun);box-shadow:0 0 0 3px rgba(255,200,74,.24)}
.theme-ico-moon{border-radius:50%;background:#dce9f7;box-shadow:inset -5px 2px 0 0 rgba(6,24,47,.92);transform:rotate(-24deg)}
:root:not([data-theme="dark"]) .theme-ico-moon{opacity:0;transform:rotate(-24deg) scale(.4)}
:root[data-theme="dark"] .theme-ico-sun{opacity:0;transform:scale(.4)}

/* ---------- contact ---------- */
.contact{padding:82px 0;background:var(--surface-2)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:34px;align-items:start}
.contact-cards{display:grid;gap:12px}
.contact-card{display:flex;gap:16px;align-items:flex-start;padding:22px;border:1px solid var(--line);border-radius:20px;background:var(--surface);text-decoration:none;transition:.25s var(--ease)}
.contact-card:hover{transform:translateY(-3px);box-shadow:0 14px 40px rgba(7,26,51,.12);border-color:var(--green)}
.contact-ico{flex:0 0 auto;display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--mint);color:var(--green);font-size:1.15rem;font-weight:900}
.contact-card span{display:block;font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.contact-card b{display:block;margin-top:5px;font-family:"Manrope",sans-serif;font-size:1.16rem;letter-spacing:-.03em;color:var(--ink)}
.contact-card small{display:block;margin-top:5px;font-size:.78rem;color:var(--muted);line-height:1.5}
.contact-aside{padding:28px;border:1px solid var(--line);border-radius:22px;background:var(--surface)}
.contact-aside h3{font-size:1.28rem}
.contact-aside ol{margin:18px 0 0;padding-left:20px;display:grid;gap:11px}
.contact-aside li{font-size:.85rem;color:var(--muted);line-height:1.55}
.contact-aside li b{color:var(--ink)}
.contact-hours{margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:.8rem;color:var(--muted)}
.contact-hours b{color:var(--ink)}
@media(max-width:850px){.contact-grid{grid-template-columns:1fr}}