/* Layout: a deep-green monsoon hero carrying a giant Nastaliq "بارش", then calm paper-white
   sections: why, offer, process, a working roof calculator with a rainfall-by-city chart, founders, FAQ. */
:root {
  --bg: #f1f6f3;
  --surface: #ffffff;
  --fg: #0c2825;
  --muted: #4b625e;
  --line: #cddad4;
  --green: #0b5d3b;
  --on-green: #ffffff;
  --water: #17789f;
  --water-soft: #d9edf5;
  --hero: #07382a;
  --hero-fg: #eaf6f0;
  --hero-muted: #a9cdbf;
  --hero-water: #7fd0ee;
  --f-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-body: "Instrument Sans", "Segoe UI", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --f-urdu: "Noto Nastaliq Urdu", "Jameel Noori Nastaleeq", "Noto Naskh Arabic", serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a1a17; --surface: #112623; --fg: #e4f1ec; --muted: #98b3ab; --line: #24403a;
    --green: #4fbf8a; --on-green: #04211a; --water: #6cc3e6; --water-soft: #12303b;
    --hero: #052a1f; --hero-fg: #eaf6f0; --hero-muted: #9fc4b6; --hero-water: #7fd0ee;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a1a17; --surface: #112623; --fg: #e4f1ec; --muted: #98b3ab; --line: #24403a;
  --green: #4fbf8a; --on-green: #04211a; --water: #6cc3e6; --water-soft: #12303b;
  --hero: #052a1f; --hero-fg: #eaf6f0; --hero-muted: #9fc4b6; --hero-water: #7fd0ee;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--f-body); font-size: 17px; line-height: 1.6; }
h1, h2, h3 { font-family: var(--f-display); line-height: 1.08; margin: 0; text-wrap: balance; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--water); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: 1160px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.eyebrow { font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--water); font-weight: 500; }
section { padding-block: clamp(3.5rem, 8vw, 6rem); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.sec-head { display: grid; gap: 0.9rem; margin-bottom: 2.5rem; max-width: 46rem; }
.sec-head h2 { font-size: clamp(2rem, 4.6vw, 3.2rem); }

/* hero */
.hero { background: var(--hero); color: var(--hero-fg); position: relative; overflow: hidden; padding-block: 0 clamp(3rem, 7vw, 5.5rem); }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero .wrap { position: relative; }
.nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem 1.5rem; padding-block: 1.25rem; }
.brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--f-display); font-weight: 700; font-size: 1.35rem; text-decoration: none; letter-spacing: -0.01em; }
.brand svg { width: 1.3rem; height: 1.6rem; }
.nav ul { display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; list-style: none; margin: 0; padding: 0; font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--hero-muted); }
.nav a:hover { color: var(--hero-fg); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 2rem 3rem; align-items: center; padding-top: clamp(2rem, 6vw, 4.5rem); }
.hero .eyebrow { color: var(--hero-water); }
.hero h1 { font-size: clamp(2.8rem, 7.2vw, 5.4rem); font-weight: 750; margin: 1rem 0 1.4rem; }
.hero h1 em { font-style: normal; color: var(--hero-water); }
.hero .lead { color: var(--hero-muted); }
.btns { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: 0.7rem 1.4rem; border-radius: 0.5rem; font-weight: 600; font-size: 1rem; text-decoration: none; border: 1.5px solid transparent; cursor: pointer; font-family: var(--f-body); }
.btn-primary { background: var(--hero-water); color: #04283a; }
.btn-primary:hover { background: #a6e0f4; }
.btn-ghost { border-color: rgba(234, 246, 240, 0.4); color: var(--hero-fg); background: transparent; }
.btn-ghost:hover { border-color: var(--hero-fg); }
.urdu-card { display: grid; place-items: center; text-align: center; gap: 0.5rem; padding: 1rem 0; }
.urdu { font-family: var(--f-urdu); font-size: clamp(6.5rem, 17vw, 12.5rem); line-height: 1.7; color: var(--hero-water); direction: rtl; }
.urdu-cap { font-family: var(--f-mono); font-size: 0.82rem; letter-spacing: 0.1em; color: var(--hero-muted); }
.unit-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1px; margin-top: clamp(2.5rem, 6vw, 4rem); background: rgba(234, 246, 240, 0.2); border: 1px solid rgba(234, 246, 240, 0.2); border-radius: 0.6rem; overflow: hidden; }
.unit-strip div { background: var(--hero); padding: 1rem 1.2rem; min-width: 0; }
.unit-strip b { display: block; font-family: var(--f-mono); font-weight: 500; font-size: 1.05rem; color: var(--hero-water); }
.unit-strip span { font-size: 0.9rem; color: var(--hero-muted); }

/* why */
.three { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); gap: 2rem 2.5rem; }
.three > div { min-width: 0; border-top: 2px solid var(--green); padding-top: 1.1rem; display: grid; gap: 0.6rem; align-content: start; }
.three h3 { font-size: 1.4rem; }
.three p { color: var(--muted); }
.heritage { margin-top: 3rem; padding: 1.4rem 1.6rem; background: var(--water-soft); border-radius: 0.6rem; max-width: 52rem; }
.heritage p { color: var(--fg); }

/* offer */
.offer-wrap { background: var(--surface); border-block: 1px solid var(--line); }
.offer { display: grid; gap: 0; }
.offer-row { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr); gap: 0.6rem 3rem; padding-block: 1.8rem; border-top: 1px solid var(--line); }
.offer-row:first-child { border-top: 0; padding-top: 0; }
.offer-row h3 { font-size: 1.6rem; }
.offer-row p { color: var(--muted); max-width: 58ch; }
.tag { display: inline-block; font-family: var(--f-mono); font-size: 0.75rem; color: var(--green); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.5rem; }

/* flow */
.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr)); gap: 1.2rem; counter-reset: step; }
.flow li { counter-increment: step; background: var(--surface); border: 1px solid var(--line); border-radius: 0.6rem; padding: 1.1rem 1.1rem 1.3rem; display: grid; gap: 0.5rem; align-content: start; min-width: 0; position: relative; }
.flow li::before { content: counter(step); font-family: var(--f-mono); font-size: 0.85rem; color: var(--water); font-weight: 500; }
.flow h3 { font-size: 1.15rem; }
.flow p { font-size: 0.95rem; color: var(--muted); }

/* calculator */
.calc-wrap { background: var(--surface); border-block: 1px solid var(--line); }
.calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 2.5rem 3.5rem; align-items: start; }
.fields { display: grid; gap: 1.1rem; }
.field { display: grid; gap: 0.35rem; min-width: 0; }
.field label { font-weight: 600; font-size: 0.95rem; }
.field small { color: var(--muted); font-size: 0.85rem; }
.field input, .field select { font: inherit; font-size: 1rem; padding: 0.7rem 0.8rem; border: 1.5px solid var(--line); border-radius: 0.45rem; background: var(--bg); color: var(--fg); width: 100%; min-height: 3rem; }
.row2 { display: grid; grid-template-columns: 1.2fr 1fr; gap: 0.8rem; }
.result { background: var(--hero); color: var(--hero-fg); border-radius: 0.8rem; padding: clamp(1.4rem, 4vw, 2.2rem); display: grid; gap: 1.4rem; min-width: 0; }
.result .big { font-family: var(--f-display); font-size: clamp(2.6rem, 8vw, 4.2rem); font-weight: 750; letter-spacing: -0.03em; color: var(--hero-water); line-height: 1; font-variant-numeric: tabular-nums; }
.result .big small { font-size: 1.1rem; font-weight: 500; color: var(--hero-muted); letter-spacing: 0; margin-left: 0.4rem; }
.result .lbl { font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--hero-muted); margin-bottom: 0.5rem; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 9.5rem), 1fr)); gap: 1rem; padding-top: 1.2rem; border-top: 1px solid rgba(234, 246, 240, 0.2); }
.stats b { display: block; font-family: var(--f-display); font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.stats span { font-size: 0.85rem; color: var(--hero-muted); }
.result .btn { background: var(--hero-water); color: #04283a; justify-self: start; }
.note { font-size: 0.85rem; color: var(--hero-muted); }
.chart-block { margin-top: 3.5rem; }
.chart-block h3 { font-size: 1.5rem; margin-bottom: 0.4rem; }
.chart-block > p { color: var(--muted); margin-bottom: 1.4rem; }
.ticks, .bar-row { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr) 4.6rem; gap: 0.8rem; align-items: center; }
.ticks .scale { position: relative; height: 1.2rem; font-family: var(--f-mono); font-size: 0.72rem; color: var(--muted); }
.ticks .scale span { position: absolute; transform: translateX(-50%); }
.ticks .scale span:first-child { transform: none; }
.ticks .scale span:last-child { transform: translateX(-100%); }
.bar-row { padding-block: 0.3rem; }
.bar-row .city { font-weight: 600; font-size: 0.95rem; }
.bar-row .track { height: 1.5rem; background-image: linear-gradient(to right, var(--line) 1px, transparent 1px); background-size: 25% 100%; background-repeat: repeat-x; border-right: 1px solid var(--line); }
.bar-row .bar { height: 100%; background: var(--water); opacity: 0.55; border-radius: 0 3px 3px 0; transition: width 0.4s ease; }
.bar-row.sel .bar { opacity: 1; background: var(--green); }
.bar-row .val { font-family: var(--f-mono); font-size: 0.85rem; text-align: right; font-variant-numeric: tabular-nums; }
.bar-row.sel .city, .bar-row.sel .val { color: var(--green); font-weight: 700; }
.chart-foot { margin-top: 0.8rem; font-size: 0.85rem; color: var(--muted); }

/* product */
.product { display: grid; grid-template-columns: minmax(0, 21rem) minmax(0, 1fr); gap: 2.5rem 4rem; align-items: start; }
.video { margin: 0; display: grid; gap: 0.7rem; }
.video video { width: 100%; height: auto; aspect-ratio: 9 / 16; display: block; border-radius: 0.8rem; background: #0b1512; object-fit: cover; }
.video figcaption { font-size: 0.85rem; color: var(--muted); }
.product-copy { display: grid; gap: 1.1rem; min-width: 0; }
.product-copy h2 { font-size: clamp(2rem, 4.2vw, 2.9rem); }
.parts { margin: 0.6rem 0 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.parts > div { display: grid; grid-template-columns: minmax(0, 11rem) minmax(0, 1fr); gap: 0.3rem 1.5rem; padding-block: 0.85rem; border-bottom: 1px solid var(--line); }
.parts dt { font-family: var(--f-display); font-weight: 600; font-size: 1.1rem; }
.parts dd { margin: 0; color: var(--muted); }
.road-title { font-size: 1.3rem; margin-top: 0.8rem; }
.road { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.road li { display: grid; grid-template-columns: 5.2rem minmax(0, 1fr); gap: 1rem; align-items: start; }
.road b { font-family: var(--f-display); font-size: 1.1rem; }
.road p { color: var(--muted); font-size: 0.95rem; }
.chip { display: inline-block; text-align: center; font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; padding: 0.3rem 0.5rem; border-radius: 0.3rem; font-weight: 500; }
.chip.live { background: var(--green); color: var(--on-green); }
.chip.plan { border: 1.5px dashed var(--water); color: var(--water); }

/* founders */
.founders { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); gap: 1.5rem; }
.founder { background: var(--surface); border: 1px solid var(--line); border-radius: 0.8rem; padding: 1.8rem; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 1.3rem; align-items: center; }
.mono { width: 5.2rem; height: 5.2rem; border-radius: 50%; background: var(--green); color: var(--on-green); display: grid; place-items: center; font-family: var(--f-display); font-weight: 700; font-size: 2rem; letter-spacing: -0.03em; }
.founder h3 { font-size: 1.5rem; }
.role { font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--water); margin-top: 0.4rem; }
.founder p { color: var(--muted); font-size: 0.95rem; margin-top: 0.2rem; }
.founders-note { margin-top: 1.6rem; max-width: 52rem; color: var(--muted); }

/* faq */
.faq { display: grid; gap: 0; max-width: 52rem; border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); padding-block: 1.1rem; }
summary { cursor: pointer; font-family: var(--f-display); font-weight: 600; font-size: 1.25rem; list-style: none; display: flex; justify-content: space-between; gap: 1rem; letter-spacing: -0.01em; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-family: var(--f-mono); color: var(--water); }
details[open] summary::after { content: "\2212"; }
details p { margin-top: 0.7rem; color: var(--muted); max-width: 60ch; }

footer { background: var(--hero); color: var(--hero-muted); padding-block: 2.5rem; font-size: 0.92rem; }
footer .wrap { display: grid; gap: 0.7rem; }
footer b { color: var(--hero-fg); font-family: var(--f-display); font-size: 1.2rem; }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .urdu-card { order: -1; padding: 0; }
  .calc, .offer-row, .product { grid-template-columns: minmax(0, 1fr); }
  .video { max-width: 22rem; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .ticks, .bar-row { grid-template-columns: 4.6rem minmax(0, 1fr) 3.6rem; gap: 0.5rem; }
  .row2 { grid-template-columns: minmax(0, 1fr); }
  .founder { grid-template-columns: minmax(0, 1fr); }
  .parts > div, .road li { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bar-row .bar { transition: none; }
}