/* Bijli Bachaao: midday-sky blue with a warm sun accent; green means money saved.
   Headings: Baloo 2. Body: Mukta. Both cover Latin and Devanagari. */
:root {
  --bg: #f2f6fa;
  --surface: #ffffff;
  --surface-2: #edf3f8;
  --ink: #0f1d2e;
  --muted: #536274;
  --border: #d9e2ec;
  --link: #0a5f8c;
  --hero-a: #0b4a6f;
  --hero-b: #0d7391;
  --hero-ink: #ffffff;
  --hero-muted: rgba(255, 255, 255, .82);
  --sun: #f59e0b;
  --sun-soft: #fff4dc;
  --sun-ink: #1d1300;
  --good: #15803d;
  --good-soft: #e6f5eb;
  --footer: #0b1726;
  --footer-ink: #c9d5e3;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 29, 46, .06), 0 6px 20px rgba(15, 29, 46, .06);
  --font-display: "Baloo 2", "Mukta", system-ui, sans-serif;
  --font-body: "Mukta", system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Devanagari", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a111c; --surface: #111b2a; --surface-2: #172338; --ink: #e6edf5; --muted: #9babbe; --border: #24334a;
    --link: #7cc6f0; --hero-a: #0a2e47; --hero-b: #0b4b5e; --sun: #fbbf24; --sun-soft: #2f2410; --sun-ink: #1d1300;
    --good: #4ade80; --good-soft: #10291b; --footer: #060c15; --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a111c; --surface: #111b2a; --surface-2: #172338; --ink: #e6edf5; --muted: #9babbe; --border: #24334a;
  --link: #7cc6f0; --hero-a: #0a2e47; --hero-b: #0b4b5e; --sun: #fbbf24; --sun-soft: #2f2410; --sun-ink: #1d1300;
  --good: #4ade80; --good-soft: #10291b; --footer: #060c15; --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--font-body); }
html[lang="hi"] body { line-height: 1.75; }
a { color: var(--link); text-underline-offset: 2px; }
img, svg { max-width: 100%; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; text-wrap: balance; }
h2 { font-size: 1.45rem; margin: 0 0 12px; }
h3 { font-size: 1.12rem; margin: 18px 0 8px; }
.wrap { max-width: 1120px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.ic { width: 22px; height: 22px; flex: none; }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 2px; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); background: var(--surface); z-index: 21; }
.site-header .wrap { display: flex; align-items: center; gap: 18px; padding-block: 10px; }
.logo { display: inline-flex; align-items: center; gap: 6px; text-decoration: none; color: var(--ink); font-family: var(--font-display); font-weight: 800; font-size: 1.35rem; flex: none; }
.logo b { color: var(--sun); font-weight: 800; }
.logo-mark { width: 28px; height: 28px; color: var(--sun); }
.nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; flex: 1; min-width: 0; }
.nav::-webkit-scrollbar { display: none; }
.nav a { color: var(--muted); text-decoration: none; white-space: nowrap; padding: 6px 10px; border-radius: 999px; font-weight: 500; }
.nav a:hover { color: var(--ink); background: var(--surface-2); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--sun-soft); }
.lang-switch { flex: none; text-decoration: none; font-weight: 700; color: var(--hero-a); border: 2px solid var(--sun); border-radius: 999px; padding: 3px 14px; background: var(--sun-soft); }
:root[data-theme="dark"] .lang-switch { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .lang-switch { color: var(--ink); } }
@media (max-width: 720px) {
  .site-header .wrap { flex-wrap: wrap; gap: 6px 12px; }
  .nav { order: 3; flex-basis: 100%; }
  .lang-switch { margin-left: auto; }
}

/* Hero band */
.hero {
  color: var(--hero-ink);
  background:
    radial-gradient(520px 320px at 92% -10%, rgba(251, 191, 36, .55), transparent 65%),
    radial-gradient(260px 160px at 92% -10%, rgba(255, 237, 160, .5), transparent 70%),
    linear-gradient(135deg, var(--hero-a), var(--hero-b));
  padding-block: 26px 30px;
}
.hero h1 { font-size: clamp(1.8rem, 4.2vw, 2.7rem); margin: 4px 0 8px; font-weight: 800; }
.hero .lede { color: var(--hero-muted); font-size: 1.12rem; max-width: 62ch; margin: 0 0 18px; }
.crumbs { font-size: .88rem; color: var(--hero-muted); }
.crumbs a { color: var(--hero-ink); }

.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; margin-top: 6px; }
.stat { display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px; border-radius: 12px; background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .18); min-width: 0; }
.stat .ic { color: #fcd34d; margin-top: 2px; }
.stat .k { font-size: .85rem; color: var(--hero-muted); }
.stat .v { font-weight: 700; font-size: 1.05rem; line-height: 1.35; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.stat.hl { background: var(--sun); color: var(--sun-ink); border-color: transparent; grid-column: span 2; }
.stat.hl .ic { color: var(--sun-ink); }
.stat.hl .k { color: rgba(29, 19, 0, .75); }
.stat.hl .v { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; }
@media (max-width: 560px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .stat { padding: 9px 10px; gap: 8px; }
  .stat .ic { width: 18px; height: 18px; }
  .stat .k { font-size: .76rem; }
  .stat .v { font-size: .92rem; }
  .stat.hl .v { font-size: 1.25rem; }
}

.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.chip-label { font-weight: 600; margin-right: 4px; }
.chip { display: inline-flex; gap: 6px; align-items: baseline; text-decoration: none; color: var(--sun-ink); background: #ffffff; border-radius: 999px; padding: 7px 14px; font-weight: 700; box-shadow: 0 2px 0 rgba(0, 0, 0, .12); }
.chip span { color: var(--muted); font-weight: 500; font-size: .9rem; }
.chip:hover { background: var(--sun); }
.chip:hover span { color: var(--sun-ink); }

main { padding-block: 26px 40px; }
main > .wrap > * + * { margin-top: 28px; }
.section-title { font-size: 1.45rem; }

/* Calculator */
.calc { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; align-items: start; }
@media (min-width: 900px) { .calc { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); } }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); min-width: 0; }
.form-card { border-top: 5px solid var(--sun); }
.result-card { border-top: 5px solid var(--good); }
.card > h2 { display: flex; align-items: center; gap: 8px; font-size: 1.3rem; }
.card > h2 .ic { color: var(--sun); }
.fields { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
@media (max-width: 420px) { .fields { grid-template-columns: minmax(0, 1fr); } }
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field.full, .fields.full { grid-column: 1 / -1; }
.field label, .field .label { font-size: .92rem; font-weight: 600; }
.hint { font-size: .8rem; color: var(--muted); line-height: 1.4; }
.sub { margin: 6px 0 0; font-size: 1.05rem; }
input, select {
  font: inherit; font-size: 1rem; color: var(--ink); background: var(--surface); border: 1.5px solid var(--border);
  border-radius: 10px; padding: 9px 12px; width: 100%; min-width: 0; min-height: 44px;
}
input:focus, select:focus { outline: none; border-color: var(--sun); box-shadow: 0 0 0 3px var(--sun-soft); }
label.check { flex-direction: row; display: flex; align-items: center; gap: 8px; font-weight: 600; }
label.check input { width: 20px; height: 20px; min-height: 0; accent-color: var(--good); }
.seg { display: flex; background: var(--surface-2); border-radius: 12px; padding: 4px; gap: 4px; }
.seg label { flex: 1; text-align: center; padding: 8px 6px; cursor: pointer; font-weight: 600; font-size: .95rem; border-radius: 9px; color: var(--muted); }
.seg input { position: absolute; opacity: 0; width: 1px; height: 1px; min-height: 0; }
.seg label:has(input:checked) { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
.seg label:has(input:focus-visible) { outline: 3px solid var(--sun); }
fieldset.from-bill { grid-column: 1 / -1; border: 1.5px dashed var(--sun); border-radius: 12px; padding: 10px 14px 14px; margin: 0; min-width: 0; background: var(--sun-soft); }
fieldset.from-bill legend { font-weight: 700; padding: 0 6px; }
fieldset.from-bill > .hint { margin: 0 0 10px; }
details.adv { grid-column: 1 / -1; border-top: 1px dashed var(--border); padding-top: 10px; }
details.adv summary, details.more summary { cursor: pointer; font-weight: 700; color: var(--link); }
details.adv .fields { margin-top: 12px; }
.hidden { display: none !important; }

/* Results */
.answer { font-size: 1.15rem; line-height: 1.6; margin: 0 0 14px; }
.answer strong { color: var(--good); }
.kpis { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 14px; }
@media (min-width: 560px) { .kpis { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.kpis.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kpi { background: var(--surface-2); border-radius: 12px; padding: 12px 14px; min-width: 0; }
.kpi .k { font-size: .84rem; color: var(--muted); }
.kpi .v { font-family: var(--font-display); font-size: 1.45rem; font-weight: 800; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; line-height: 1.25; }
.kpi.hero { background: var(--good); color: #fff; }
.kpi.hero .k { color: rgba(255, 255, 255, .88); }
:root[data-theme="dark"] .kpi.hero { color: #06210f; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .kpi.hero { color: #06210f; } :root:not([data-theme="light"]) .kpi.hero .k { color: rgba(6, 33, 15, .8); } }
@media (max-width: 520px) {
  .kpis.three { grid-template-columns: minmax(0, 1fr); }
  .kpis.three .kpi { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
}
.workings { background: var(--surface-2); border-radius: 12px; padding: 12px 16px; margin: 4px 0 12px; }
.workings h3 { margin: 0 0 6px; font-size: 1rem; }
.workings ol { margin: 0; padding-left: 1.3rem; display: grid; gap: 4px; }
.workings p { margin: 6px 0 0; }
details.more { border-top: 1px solid var(--border); padding: 10px 0; }
details.more[open] summary { margin-bottom: 8px; }
.tip { background: var(--sun-soft); border-radius: 10px; padding: 10px 12px; font-size: .95rem; }
.result-disclaimer { font-size: .8rem; color: var(--muted); border-top: 1px solid var(--border); padding-top: 8px; margin: 12px 0 0; }
.cta { display: inline-block; margin-top: 12px; background: var(--sun); color: var(--sun-ink); padding: 10px 16px; border-radius: 10px; font-weight: 700; text-decoration: none; }
.cta:hover { filter: brightness(1.05); }
.chart { margin-top: 8px; }
.chart text { fill: var(--muted); font-size: 11px; }
.badge { display: inline-block; font-size: .75rem; background: var(--good); color: #fff; border-radius: 999px; padding: 0 8px; margin-left: 4px; vertical-align: 1px; }
.est { font-size: .72rem; font-weight: 700; color: #92400e; background: var(--sun-soft); border: 1px solid var(--sun); border-radius: 6px; padding: 0 5px; vertical-align: 1px; }
:root[data-theme="dark"] .est { color: var(--sun); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .est { color: var(--sun); } }

/* Tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .95rem; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); }
tbody tr:last-child td { border-bottom: 0; }
th { font-size: .82rem; color: var(--muted); font-weight: 600; background: var(--surface-2); }
td.num, th.num { text-align: right; }
tr.total td { font-weight: 800; background: var(--surface-2); }
tr.minus td.num { color: var(--good); font-weight: 600; }
tr.current td, tr.best td { background: var(--sun-soft); font-weight: 600; }
.bars .bar { display: inline-block; vertical-align: middle; height: 8px; width: calc(var(--w) * .5); border-radius: 4px; background: linear-gradient(90deg, var(--sun), #fcd34d); margin-right: 10px; }

/* Content blocks */
.prose { max-width: 78ch; }
.prose > * + * { margin-top: 12px; }
.note { font-size: .86rem; color: var(--muted); }
.cols { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
@media (min-width: 860px) { .cols { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; min-width: 0; }
.panel > h2, .panel > h3 { display: flex; align-items: center; gap: 8px; margin-top: 0; font-size: 1.2rem; }
.panel > h2 .ic { color: var(--sun); }
.panel .table-wrap + .table-wrap { margin-top: 10px; }
ul.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
ul.ticks li { position: relative; padding-left: 26px; }
ul.ticks li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 12px; height: 12px; border-radius: 50%; background: var(--sun); box-shadow: 0 0 0 3px var(--sun-soft); }
ol.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; gap: 10px; }
ol.steps li { counter-increment: s; position: relative; padding-left: 44px; min-height: 32px; }
ol.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 32px; height: 32px; border-radius: 50%; background: var(--hero-a); color: #fff; display: grid; place-items: center; font-weight: 800; font-family: var(--font-display); }
.callout { display: flex; gap: 10px; align-items: flex-start; background: var(--good-soft); border-radius: 12px; padding: 12px 14px; }
.callout .ic { color: var(--good); }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { display: inline-block; padding: 6px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); text-decoration: none; font-weight: 600; }
.pill:hover { border-color: var(--sun); }

.size-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.size-card { display: flex; flex-direction: column; gap: 2px; height: 100%; padding: 16px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); text-decoration: none; color: var(--ink); box-shadow: var(--shadow); transition: transform .15s ease, border-color .15s ease; }
.size-card:hover { transform: translateY(-2px); border-color: var(--sun); }
.size-card .size { font-family: var(--font-display); font-size: 2.2rem; font-weight: 800; line-height: 1; color: var(--hero-a); }
.size-card .size small { font-size: 1rem; margin-left: 3px; color: var(--sun); }
:root[data-theme="dark"] .size-card .size { color: var(--ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .size-card .size { color: var(--ink); } }
.size-card .pay { font-weight: 700; margin-top: 8px; color: var(--good); }
.size-card .meta { font-size: .84rem; color: var(--muted); }

.tool-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.tool-grid a { display: grid; grid-template-columns: auto 1fr; column-gap: 10px; height: 100%; padding: 14px 16px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); text-decoration: none; color: var(--ink); }
.tool-grid a:hover { border-color: var(--sun); }
.tool-grid .ic { grid-row: span 2; color: var(--sun); width: 28px; height: 28px; }
.tool-grid small { color: var(--muted); }

.glossary { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.glossary dl { margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px 22px; }
.glossary dt { font-weight: 700; font-family: var(--font-display); font-size: 1.05rem; }
.glossary dd { margin: 2px 0 0; color: var(--muted); }

.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin-top: 8px; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { margin: 8px 0 0; }

.disclaimer { display: flex; gap: 12px; align-items: flex-start; background: var(--sun-soft); border: 1px solid var(--sun); border-radius: var(--radius); padding: 14px 16px; font-size: .92rem; }
.disclaimer .ic { color: var(--sun); margin-top: 3px; }
.disclaimer p { margin: 0; }
.ad-slot { min-height: 90px; }

.site-footer { background: var(--footer); color: var(--footer-ink); padding-block: 30px 34px; font-size: .92rem; }
.site-footer a { color: var(--footer-ink); text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 22px; }
.site-footer h2 { font-size: 1rem; color: #fff; margin: 0 0 8px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.site-footer .fine { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: 22px; padding-top: 14px; font-size: .82rem; color: #8fa0b5; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }