/* الو لوله نادر — single page */
@font-face{font-family:"Vazirmatn";src:url("../fonts/Vazirmatn-Regular.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Vazirmatn";src:url("../fonts/Vazirmatn-Medium.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Vazirmatn";src:url("../fonts/Vazirmatn-Bold.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Vazirmatn";src:url("../fonts/Vazirmatn-ExtraBold.woff2") format("woff2");font-weight:800;font-display:swap}

:root{
  --bg:#f6f7fb;--surface:#ffffff;--ink:#0b1220;--ink-2:#4b5563;--line:#e6e8ef;
  --brand:#0b1220;--accent:#ffd400;--accent-ink:#1a1500;--accent-2:#fff3a6;
  --radius:20px;--radius-sm:14px;--shadow:0 10px 30px rgba(11,18,32,.08);
  --max:1120px;--pad:clamp(16px,4vw,32px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Vazirmatn",system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;font-size:15.5px;padding-bottom:76px}
img,video{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3{margin:0;line-height:1.35;font-weight:800;letter-spacing:-.01em}
p{margin:0}
.ico{width:1.15em;height:1.15em;flex:none}
.skip{position:absolute;inset-inline-start:-999px;top:0}
.skip:focus{inset-inline-start:8px;top:8px;background:var(--accent);padding:8px 12px;border-radius:8px;z-index:99}

/* promo strip */
.promo{display:flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:var(--accent-ink);font-weight:700;font-size:14px;padding:8px var(--pad);text-align:center}

/* header */
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px var(--pad);background:rgba(246,247,251,.85);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand__logo{height:38px;width:auto;flex:none}
.brand__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand__text b{font-size:17px;font-weight:800}
.brand__text small{font-size:12px;color:var(--ink-2)}
.top__nav{display:flex;gap:4px;margin-inline-start:auto}
.top__nav a{padding:8px 12px;border-radius:999px;font-weight:700;font-size:14px;color:var(--ink-2)}
.top__nav a:hover,.top__nav a[aria-current]{background:var(--surface);color:var(--ink);border:1px solid var(--line);padding:7px 11px}
.top__phones{display:flex;gap:8px}
.pill{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-weight:700;font-size:14px;white-space:nowrap}
.pill--primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.pill .ico{width:16px;height:16px}

main{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}

/* hero */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(20px,4vw,48px);align-items:center;padding:clamp(28px,6vw,72px) 0 clamp(20px,4vw,40px)}
.eyebrows{display:flex;flex-wrap:wrap;gap:8px}
.eyebrow--mobile{display:none}
.eyebrow{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:13px;color:var(--ink-2);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:4px 12px}
.hero h1{font-size:clamp(26px,4.2vw,46px);margin-top:14px}
.hero h1 span{background:linear-gradient(transparent 62%,var(--accent) 62%)}
.lede{margin-top:14px;color:var(--ink-2);max-width:56ch}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 20px;border-radius:14px;font-weight:800;font-size:15.5px;transition:transform .15s,box-shadow .15s}
.btn:active{transform:scale(.98)}
.btn--primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 8px 20px rgba(255,212,0,.35)}
.btn--ghost{background:var(--surface);border:1px solid var(--line)}
.btn--sm{padding:9px 14px;font-size:14px;border-radius:12px}
.chips{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:22px;max-width:520px}
.chips li{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:9px 12px;font-weight:700;font-size:13.5px}
.chips .ico{color:#b48f00}
.hero__art{margin:0;position:relative}
.hero__art img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;height:auto;object-fit:contain;background:#0b1220}
.hero__badge{position:absolute;bottom:14px;inset-inline-start:14px;display:inline-flex;align-items:center;gap:6px;background:rgba(11,18,32,.88);color:#fff;font-weight:700;font-size:13px;padding:7px 12px;border-radius:999px;backdrop-filter:blur(6px)}
.hero__badge .ico{color:var(--accent)}

/* sections */
.section{padding:clamp(28px,5vw,56px) 0}
.section--tint{position:relative}
.section--tint::before{content:"";position:absolute;inset:0 calc(50% - 50vw);background:var(--surface);border-block:1px solid var(--line);z-index:-1}
.section__head{text-align:center;margin-bottom:clamp(18px,3vw,30px)}
.section__head--start{text-align:start}
.section__head h2{font-size:clamp(21px,3vw,32px)}
.section__head p{color:var(--ink-2);margin-top:6px}
.grid{display:grid;gap:12px}
.grid--services{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 14px;display:flex;flex-direction:column;gap:6px;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card__icon{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--accent-2);color:var(--brand)}
.card__icon .ico{width:22px;height:22px}
.card h3{font-size:15.5px;margin-top:4px}
.card p{font-size:13.5px;color:var(--ink-2);line-height:1.6}

/* details with posters */
.grid--details{grid-template-columns:repeat(3,minmax(0,1fr))}
.detail{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.detail summary{list-style:none;cursor:pointer;position:relative}
.detail summary::-webkit-details-marker{display:none}
.detail summary img{aspect-ratio:3/4;object-fit:contain;width:100%;background:#0b1220}
.detail__title{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;font-weight:800;font-size:14.5px;background:var(--surface)}
.detail__title::after{content:"+";font-size:20px;line-height:1;color:var(--ink-2);flex:none;transition:transform .2s}
.detail[open] .detail__title::after{transform:rotate(45deg)}
.detail__body{padding:12px 12px 14px;background:var(--surface);border-top:1px solid var(--line);font-size:14px}
.detail__body p{color:var(--ink-2)}
.detail__body ul{margin:10px 0 12px;display:grid;gap:6px}
.detail__body li{display:flex;gap:6px;align-items:flex-start}
.detail__body li .ico{color:#0a9b5b;margin-top:4px}

/* equipment split */
.split{display:grid;grid-template-columns:.7fr 1.3fr;gap:clamp(18px,4vw,40px);align-items:center}
.split__media{margin:0}
.split__media video{border-radius:var(--radius);box-shadow:var(--shadow);aspect-ratio:9/16;object-fit:cover;width:100%;max-width:320px;margin-inline:auto}
.split__copy h2{font-size:clamp(21px,3vw,30px)}
.split__copy > p{color:var(--ink-2);margin-top:10px}
.grid--why{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:18px}
.grid--why li{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px;font-weight:700;font-size:14px}
.grid--why .ico{width:26px;height:26px;color:#b48f00;flex:none}

/* leak detection */
.leak__grid{display:grid;grid-template-columns:1.25fr .75fr;gap:clamp(18px,4vw,40px);align-items:center}
.leak__copy h2{font-size:clamp(21px,3vw,30px)}
.leak__copy > p{color:var(--ink-2);margin-top:10px}
.grid--leak{grid-template-columns:repeat(2,minmax(0,1fr));margin:16px 0 18px}
.grid--leak li{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:11px 12px;font-weight:700;font-size:14px}
.grid--leak .ico{width:24px;height:24px;color:#b48f00;flex:none}
.leak__media{margin:0}
.leak__media img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;max-width:380px;margin-inline:auto;background:#0b1220}

/* faq */
.faq{max-width:820px;margin:0 auto;display:grid;gap:8px}
.faq__item{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:0 14px}
.faq__item summary{cursor:pointer;list-style:none;font-weight:800;font-size:15px;padding:12px 0;display:flex;justify-content:space-between;gap:10px;align-items:center}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{content:"+";font-size:20px;color:var(--ink-2);flex:none;transition:transform .2s}
.faq__item[open] summary::after{transform:rotate(45deg)}
.faq__item p{color:var(--ink-2);font-size:14px;padding:0 0 12px}

/* blog */
.grid--posts{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.grid--posts-3,.grid--home{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.grid--posts-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.post-card__img img{aspect-ratio:3/2;object-fit:cover;width:100%}
.post-card__body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px}
.post-card__meta{font-size:12.5px;color:var(--ink-2)}
.post-card h2{font-size:17px;line-height:1.5}
.post-card h3{font-size:14px;line-height:1.5;font-weight:700}
.post-card__desc{color:var(--ink-2);font-size:14px}
.post-card__more{display:inline-flex;align-items:center;gap:6px;font-weight:800;font-size:13.5px;color:#8a6d00;margin-top:auto}
.post-card--sm .post-card__body{padding:10px 12px 12px}
.section__more{text-align:center;margin-top:18px}
.blog{padding-top:16px}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--ink-2);margin:12px 0 18px}
.crumbs a{color:var(--ink);font-weight:700}
.blog__head{max-width:760px;margin-bottom:24px}
.blog__head h1{font-size:clamp(24px,3.6vw,38px)}
.blog__head p{color:var(--ink-2);margin-top:10px}
.blog__cta{margin:32px 0 40px;background:var(--brand);color:#fff;border-radius:var(--radius);padding:22px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.blog__cta p{font-weight:700}
.post{max-width:780px;margin:0 auto}
.post__head h1{font-size:clamp(24px,3.6vw,38px);margin-top:8px}
.post__lead{color:var(--ink-2);margin-top:12px;font-size:16px}
.post__hero{margin:22px 0}
.post__hero img{border-radius:var(--radius);box-shadow:var(--shadow);aspect-ratio:3/2;object-fit:cover;width:100%}
.post__body{font-size:16px;line-height:1.9}
.post__body h2{font-size:22px;margin:28px 0 10px;padding-inline-start:12px;border-inline-start:4px solid var(--accent)}
.post__body p{margin:0 0 14px}
.post__body ul,.post__body ol{margin:0 0 16px;padding-inline-start:22px}
.post__body ul{list-style:disc}.post__body ol{list-style:decimal}
.post__body li{margin-bottom:6px}
.post__body a{color:#8a6d00;font-weight:700;text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:3px}
.post__cta{margin:28px 0 14px;background:var(--brand);color:#fff;border-radius:var(--radius);padding:20px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.post__cta div{display:flex;flex-direction:column;gap:4px}
.post__cta span{color:#c9cfdb;font-size:14px}
.post__cta-btns{display:flex;gap:8px;flex-wrap:wrap}
.post__cta .btn--ghost{background:#1a2438;color:#fff;border-color:#2a3650}
.post__tags{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 36px}
.post__tags span{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:13px;color:var(--ink-2)}
.related{padding-bottom:40px}
.related h2{font-size:22px;margin-bottom:14px}
.foot__nav{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 14px;font-weight:700;font-size:13.5px}

/* contact */
.contact__card{background:var(--brand);color:#fff;border-radius:var(--radius);padding:clamp(22px,4vw,40px);display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center;box-shadow:var(--shadow)}
.contact__card .section__head{margin:0}
.contact__card .section__head p{color:#c9cfdb}
.contact__phones{display:grid;gap:10px}
.phone-big{display:flex;align-items:center;justify-content:center;gap:10px;background:var(--accent);color:var(--accent-ink);font-weight:800;font-size:clamp(20px,3vw,26px);padding:14px;border-radius:16px}
.phone-big:nth-child(2){background:#1a2438;color:#fff;border:1px solid #2a3650}
.phone-big .ico{width:22px;height:22px}
.contact__brand{grid-column:1/-1;display:flex;align-items:center;gap:8px;font-size:15px;color:#fff}
.contact__brand .ico{color:var(--accent)}
.contact__addr{grid-column:1/-1;font-style:normal;display:flex;flex-wrap:wrap;align-items:center;gap:8px;border-top:1px solid #2a3650;padding-top:16px;color:#dfe4ee;font-size:14.5px}
.contact__addr .ico{color:var(--accent)}
.contact__addr a{background:#1a2438;border:1px solid #2a3650;border-radius:999px;padding:4px 12px;font-weight:700;font-size:13px}
.contact__note{grid-column:1/-1;display:flex;align-items:center;gap:8px;color:var(--accent);font-weight:700;font-size:14px}

.foot{text-align:center;color:var(--ink-2);font-size:13px;padding:18px var(--pad) 26px;display:grid;justify-items:center;gap:8px}
.foot__logo{height:44px;width:auto}

/* mobile call bar */
.callbar{position:fixed;inset-inline:0;bottom:0;z-index:30;display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--line)}
.callbar a{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;border-radius:14px;font-weight:800;font-size:16px;background:var(--surface);border:1px solid var(--line)}
.callbar a.is-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}

/* tablet */
@media (max-width:900px){
  .top__nav{display:none}
  .grid--home{grid-template-columns:repeat(2,minmax(0,1fr))}
  .leak__grid{grid-template-columns:1fr 1fr}
  .hero{grid-template-columns:1fr 1fr}
  .grid--services{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--details{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr 1fr}
  .contact__card{grid-template-columns:1fr}
}
/* mobile: compact, two columns everywhere */
@media (max-width:640px){
  body{font-size:15px}
  .brand__logo{height:30px}
  .brand__text small{display:none}
  .top__phones .pill span{display:none}
  .top__phones .pill{padding:9px}
  .top__phones .pill .ico{width:18px;height:18px}
  .hero{grid-template-columns:1fr;gap:16px;padding-top:22px}
  .hero__art{order:-1}
  .hero__badge{display:none}
  .eyebrow--mobile{display:inline-flex;background:rgba(11,18,32,.92);color:#fff;border-color:transparent}
  .eyebrow--mobile .ico{color:var(--accent)}
  .eyebrows{gap:6px}
  .eyebrow{font-size:12.5px;padding:4px 10px}
  .hero h1{font-size:24px;margin-top:10px}
  .lede{font-size:14px}
  .cta{display:grid;grid-template-columns:1fr 1fr}
  .btn{padding:12px 10px;font-size:14px}
  .chips{gap:6px;margin-top:14px}
  .chips li{font-size:12.5px;padding:8px 10px}
  .grid{gap:10px}
  .card{padding:12px 10px}
  .card h3{font-size:14px}
  .card p{font-size:12.5px}
  .detail__title{font-size:13px;padding:8px 10px}
  .detail__body{font-size:13px}
  .split{grid-template-columns:1fr;gap:16px}
  .leak__grid{grid-template-columns:1fr;gap:14px}
  .leak__media{order:-1}
  .leak__media img{max-width:260px}
  .grid--leak li{font-size:13px;padding:10px}
  .faq__item summary{font-size:14px}
  .faq__item p{font-size:13px}
  .split__media video{max-width:220px}
  .grid--why{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--posts,.grid--posts-3,.grid--home{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .post-card__body{padding:10px}
  .post-card h2{font-size:14px}
  .post-card__desc{display:none}
  .post-card__more{font-size:12.5px}
  .post-card h3{font-size:13px}
  .post__body{font-size:15px}
  .post__body h2{font-size:19px}
  .post__cta{padding:16px}
  .post__cta-btns{width:100%;display:grid;grid-template-columns:1fr 1fr}
  .grid--why li{font-size:13px;padding:10px}
  .contact__card{padding:18px}
  .contact__phones{grid-template-columns:1fr 1fr}
  .phone-big{font-size:17px;padding:12px 8px;flex-direction:column;gap:4px}
  .contact__addr{font-size:13.5px}
}
@media (min-width:641px){.callbar{display:none}body{padding-bottom:0}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card,.btn{transition:none}}