:root{
  --ink:#1a1a1a;
  --ink-soft:#4a4a48;
  --paper:#ecebe7;
  --line:rgba(26,26,26,.28);
  --line-strong:rgba(26,26,26,.55);
  --chip:rgba(255,255,255,.34);
  --chip-hover:rgba(255,255,255,.72);
  --accent:#1f5d52;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Golos Text',Helvetica,Arial,sans-serif;
  font-size:17px;
  line-height:1.6;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}

/* ---------- фон ---------- */
.bg{position:fixed;inset:0;z-index:-2;background-size:cover;background-position:center right}
.bg::after{content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(236,235,231,.86) 0%,rgba(236,235,231,.58) 38%,rgba(236,235,231,.06) 72%,rgba(0,0,0,.06) 100%)}
.bg-main{background-image:image-set(url('bg-main.webp') type('image/webp'),url('bg-main.jpg') type('image/jpeg'))}
.bg-main::after{background:linear-gradient(90deg,rgba(236,235,231,.66) 0%,rgba(236,235,231,.3) 34%,rgba(236,235,231,0) 62%,rgba(0,0,0,.04) 100%)}
.hero-bg{position:absolute;inset:0;z-index:-1;background-size:cover;background-position:center}
.hero-bg::after{content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(236,235,231,.9) 0%,rgba(236,235,231,.66) 42%,rgba(236,235,231,.12) 78%,rgba(0,0,0,.05) 100%)}

/* фоны страниц по реальным фото */
.bg-photo-svarka{background-image:image-set(url('bg-svarka.webp') type('image/webp'),url('bg-svarka.jpg') type('image/jpeg'));background-position:center right}
.bg-photo-rezervuar{background-image:image-set(url('bg-rezervuar.webp') type('image/webp'),url('bg-rezervuar.jpg') type('image/jpeg'));background-position:center right}
.bg-photo-kolodets{background-image:image-set(url('bg-kolodets.webp') type('image/webp'),url('bg-kolodets.jpg') type('image/jpeg'));background-position:center right}
.bg-photo-remont{background-image:image-set(url('bg-remont.webp') type('image/webp'),url('bg-remont.jpg') type('image/jpeg'));background-position:center right}
.bg-photo-404{background-image:image-set(url('bg-404.webp') type('image/webp'),url('bg-404.jpg') type('image/jpeg'));background-position:center}
.bg-photo-septik{background-image:image-set(url('bg-septik.webp') type('image/webp'),url('bg-septik.jpg') type('image/jpeg'));background-position:center right}
/* тёмные кадры: слева осветляем сильнее, чтобы текст оставался читаемым */
.bg-photo-kolodets::after,.bg-photo-septik::after,.bg-photo-remont::after{
  background:linear-gradient(90deg,rgba(236,235,231,.95) 0%,rgba(236,235,231,.88) 40%,rgba(236,235,231,.5) 72%,rgba(236,235,231,.28) 100%)}

/* ---------- каркас ---------- */
.shell{max-width:1440px;margin:0 auto;padding:0 60px;width:100%}
section{padding:78px 0}
.narrow{max-width:760px}

/* ---------- типографика ---------- */
.label{display:flex;align-items:center;gap:18px;font-size:11px;font-weight:500;
  letter-spacing:.12em;text-transform:uppercase;margin:0 0 26px;max-width:none;white-space:nowrap}
.label::after{content:'';flex:1 1 auto;height:1px;background:var(--line-strong)}
h1{font-size:clamp(30px,4vw,52px);line-height:1.06;letter-spacing:-.02em;font-weight:600;margin:0 0 22px;max-width:19ch}
h2{font-size:clamp(23px,2.4vw,32px);line-height:1.15;letter-spacing:-.015em;font-weight:600;margin:0 0 18px;max-width:26ch}
h3{font-size:17px;font-weight:600;letter-spacing:-.005em;margin:0 0 8px}
p{margin:0 0 16px;max-width:68ch;color:var(--ink-soft)}
.lead{font-size:19px;color:var(--ink);max-width:56ch}
.mono{font-variant-numeric:tabular-nums}

/* ---------- шапка ---------- */
.top{position:sticky;top:0;z-index:20;backdrop-filter:blur(10px);
  background:rgba(236,235,231,.72);border-bottom:1px solid var(--line)}
.top-in{max-width:1440px;margin:0 auto;padding:14px 60px;display:flex;align-items:center;gap:28px}
.brand{font-size:13px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;text-decoration:none}
.top nav{display:flex;gap:22px;margin-left:auto;flex-wrap:wrap}
.top nav a{font-size:11px;letter-spacing:.1em;text-transform:uppercase;text-decoration:none;
  padding-bottom:2px;border-bottom:1px solid transparent}
.top nav a:hover,.top nav a[aria-current="page"]{border-bottom-color:var(--ink)}
.top .tel{font-size:13px;font-weight:600;letter-spacing:.03em;text-decoration:none;white-space:nowrap}

/* ---------- кнопки ---------- */
.chips{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.chip{display:inline-block;padding:13px 20px;border:1px solid var(--ink);background:var(--chip);
  text-decoration:none;font-size:11.5px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;
  transition:background .28s cubic-bezier(.16,1,.3,1),transform .28s cubic-bezier(.16,1,.3,1)}
.chip:hover{background:var(--chip-hover)}
.chip:active{transform:translateY(-1px)}
.chip-solid{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.chip-solid:hover{background:#000}
.row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- первый экран услуги ---------- */
.hero{position:relative;min-height:76dvh;display:flex;align-items:center;padding:110px 0 90px}
.crumb{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 20px}
.crumb a{text-decoration:none;border-bottom:1px solid var(--line)}

/* ---------- списки и сетки ---------- */
.grid{display:grid;gap:34px 48px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.split{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:56px;align-items:start}
.divided > *{border-top:1px solid var(--line);padding-top:18px}
.ticks{list-style:none;padding:0;margin:0}
.ticks li{position:relative;padding:12px 0 12px 26px;border-bottom:1px solid var(--line);
  color:var(--ink-soft);max-width:70ch}
.ticks li::before{content:'';position:absolute;left:0;top:21px;width:11px;height:1px;background:var(--ink)}

/* ---------- цифры ---------- */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0}
.stats div{border-top:1px solid var(--line-strong);padding:20px 24px 0 0}
.stats b{display:block;font-size:clamp(28px,3.1vw,42px);font-weight:600;letter-spacing:-.02em;line-height:1;
  font-variant-numeric:tabular-nums}
.stats span{display:block;margin-top:10px;font-size:13px;color:var(--ink-soft);max-width:22ch}

/* ---------- этапы ---------- */
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:0}
.steps li{counter-increment:s;display:grid;grid-template-columns:56px minmax(0,1fr);gap:20px;
  border-top:1px solid var(--line);padding:22px 0}
.steps li::before{content:counter(s,decimal-leading-zero);font-size:12px;letter-spacing:.08em;
  color:var(--ink-soft);padding-top:4px}

/* ---------- таблица ---------- */
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:13px 14px 13px 0;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:500;
  border-bottom:1.5px solid var(--ink)}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;padding-right:0}
td.num:not(:last-child),th.num:not(:last-child){padding-right:28px}
tbody tr:nth-child(odd){background:rgba(255,255,255,.28)}

/* ---------- FAQ ---------- */
details{border-top:1px solid var(--line);padding:16px 0}
details summary{cursor:pointer;font-weight:500;list-style:none;display:flex;gap:16px;align-items:flex-start}
details summary::-webkit-details-marker{display:none}
details summary::after{content:'+';margin-left:auto;font-size:18px;line-height:1;opacity:.6}
details[open] summary::after{content:'–'}
details p{margin:14px 0 4px}

/* ---------- форма ---------- */
form{display:grid;gap:18px;max-width:560px}
.field{display:grid;gap:6px}
label{font-size:11px;letter-spacing:.1em;text-transform:uppercase}
input,textarea,select{font:inherit;font-size:16px;padding:12px 14px;border:1px solid var(--line-strong);
  background:rgba(255,255,255,.55);color:var(--ink);border-radius:0}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--ink);background:rgba(255,255,255,.85)}
.hint{font-size:13px;color:var(--ink-soft);margin:0}
button{font:inherit;cursor:pointer}

/* ---------- подвал ---------- */
footer{border-top:1px solid var(--line-strong);background:rgba(236,235,231,.82)}
.foot-in{max-width:1440px;margin:0 auto;padding:44px 60px 56px;display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) minmax(0,1fr);gap:36px}
footer a{text-decoration:none}
footer .muted{color:var(--ink-soft);font-size:13px}
.flist{list-style:none;margin:0;padding:0;display:grid;gap:9px;font-size:14px}
.flist a:hover{border-bottom:1px solid var(--ink)}

@media (max-width:980px){
  .g3,.g2,.split{grid-template-columns:minmax(0,1fr)}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-in{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:768px){
  body{font-size:17px}
  .shell{padding:0 20px}
  .top-in{padding:12px 20px;gap:14px}
  .top nav{display:none}
  section{padding:52px 0}
  .hero{min-height:auto;padding:64px 0 52px}
  .bg{background-position:center}
  .bg-main{background-image:image-set(url('bg-main-mobile.webp') type('image/webp'),url('bg-main.jpg') type('image/jpeg'))}
  .bg::after,.hero-bg::after{background:linear-gradient(180deg,rgba(236,235,231,.92) 0%,rgba(236,235,231,.74) 55%,rgba(236,235,231,.88) 100%)}
  .bg-main::after{background:linear-gradient(180deg,rgba(236,235,231,.88) 0%,rgba(236,235,231,.72) 55%,rgba(236,235,231,.9) 100%)}
  .chip{width:100%;font-size:12px;padding:15px 16px}
  .label{white-space:normal;align-items:flex-start}
  .label::after{margin-top:8px}
  .row .chip{width:100%}
  .foot-in{padding:36px 20px 44px}
  .steps li{grid-template-columns:34px minmax(0,1fr);gap:12px}
}

/* ---------- страница с фиксированным фото на весь экран ---------- */
.bg-fixed{background-attachment:scroll}
.hero-clear{min-height:100dvh;padding:120px 0 96px}
.overlay{position:relative;background:rgba(236,235,231,.86);backdrop-filter:blur(7px);
  border-top:1px solid var(--line-strong)}
.overlay section{position:relative}

/* ---------- калькулятор ---------- */
.calc{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.85fr);gap:48px;align-items:start}
.calc-head{display:flex;flex-wrap:wrap;gap:16px 26px;align-items:center;justify-content:space-between;
  margin-bottom:26px;padding-bottom:18px;border-bottom:1px solid var(--line-strong)}
.seg{display:inline-flex;border:1px solid var(--ink);background:rgba(255,255,255,.4)}
.seg-btn{appearance:none;border:0;background:transparent;padding:11px 18px;font:inherit;font-size:11.5px;
  font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--ink);
  transition:background .28s cubic-bezier(.16,1,.3,1),color .28s cubic-bezier(.16,1,.3,1)}
.seg-btn+.seg-btn{border-left:1px solid var(--ink)}
.seg-btn.is-on{background:var(--ink);color:var(--paper)}
.calc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 26px}
.calc-form .field input{max-width:100%}
.err{font-size:12.5px;color:#8c2a20;min-height:17px}
.checks{display:grid;gap:12px;margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}
.check{display:flex;gap:12px;align-items:flex-start;font-size:15px;letter-spacing:0;
  text-transform:none;color:var(--ink-soft);cursor:pointer}
.check input{width:18px;height:18px;margin:2px 0 0;accent-color:var(--ink);padding:0;flex:0 0 auto}
.calc-out{border:1px solid var(--line-strong);background:rgba(255,255,255,.52);padding:28px 26px 24px}
.out-main{display:flex;align-items:baseline;gap:10px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.out-main b{font-size:clamp(32px,3.4vw,46px);font-weight:600;line-height:1;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums}
.out-main span{font-size:13px;color:var(--ink-soft)}
.out-list{margin:0;padding:0}
.out-list > div{padding:14px 0;border-bottom:1px solid var(--line)}
.out-list dt{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft)}
.out-list dd{margin:6px 0 0;font-size:15px}
.calc-out .hint{margin:16px 0 0}
.calc-out .chip{margin-top:18px}

/* ---------- раскрывающиеся блоки ---------- */
.fold-sec{padding:0}
.fold{border-top:1px solid var(--line-strong);border-bottom:0;padding:26px 0}
.fold > summary{align-items:center}
.fold > summary .label{margin:0}
.fold > summary::after{font-size:22px;opacity:.75}
.fold-body{padding-top:28px}
.fold-body .steps li:first-child{border-top:0;padding-top:0}
.fold-body .ticks li:first-child{padding-top:0}
.fold-body .ticks li:first-child::before{top:9px}

@media (max-width:980px){
  .calc{grid-template-columns:minmax(0,1fr);gap:34px}
}
@media (max-width:768px){
  .hero-clear{min-height:86dvh;padding:72px 0 60px}
  .calc-grid{grid-template-columns:minmax(0,1fr)}
  .calc-head{flex-direction:column;align-items:flex-start}
  .seg{width:100%}
  .seg-btn{flex:1 1 0;padding:13px 10px;font-size:11px}
  .calc-out{padding:22px 18px}
}

/* ---------- калькулятор в первом экране ---------- */
.hero-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,540px);gap:56px;align-items:center}
.hero-copy h1{max-width:16ch}
.hero-copy .lead{max-width:44ch}
.calc-card{border:1px solid var(--line-strong);background:rgba(255,255,255,.66);
  backdrop-filter:blur(14px);padding:32px 30px 28px;
  box-shadow:0 24px 48px -24px rgba(26,26,26,.28)}
.calc.calc-in-card{grid-template-columns:minmax(0,1fr);gap:26px}
.calc-in-card .calc-head{margin-bottom:22px}
.calc-in-card .calc-out{background:rgba(255,255,255,.62)}
.calc-in-card .out-main b{font-size:clamp(28px,2.6vw,38px)}
@media (max-width:1180px){
  .hero-split{grid-template-columns:minmax(0,1fr);gap:40px;align-items:start}
  .hero-copy h1,.hero-copy .lead{max-width:26ch}
  .hero-copy .lead{max-width:60ch}
  .calc-card{max-width:640px}
}
@media (max-width:768px){
  .calc-card{padding:24px 18px 22px}
  .hero-clear{min-height:auto;padding:60px 0 48px}
}

/* компактная посадка калькулятора в первый экран */
.hero-split{align-items:start}
.hero-clear{padding:104px 0 84px}
.calc-in-card .calc-head{margin-bottom:20px;padding-bottom:0;border-bottom:0}
.calc-in-card .calc-grid{gap:14px 22px}
.calc-in-card .err{min-height:0}
.calc-in-card .err:empty{display:none}
.calc-in-card .checks{margin-top:20px;padding-top:18px;gap:10px}
.calc-in-card .row{margin-top:18px !important}
.calc-in-card .calc-out{padding:20px 20px 18px}
.calc-in-card .out-main{padding-bottom:14px}
.calc-in-card .out-list > div{padding:11px 0}
.calc-in-card .out-list dd{font-size:14px}
.calc-in-card .calc-out .hint{margin-top:12px;font-size:12.5px}
@media (min-width:1181px){
  .hero-copy{padding-top:8px}
  .hero-copy h1{font-size:clamp(30px,3.4vw,44px)}
}

/* панель результата: компактное состояние до расчёта */
.calc-out[data-state="empty"] .out-main,
.calc-out[data-state="empty"] .out-list,
.calc-out[data-state="empty"] > .hint:not(.out-empty){display:none}
.calc-out[data-state="done"] .out-empty{display:none}
.out-empty{margin:0}

[hidden]{display:none !important}

/* ---------- частые вопросы в две колонки ---------- */
.faq-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 56px;align-items:start}
.faq-cols details{padding:15px 0}
.faq-cols summary{font-weight:400}
.faq-cols details p{max-width:52ch}
@media (max-width:900px){.faq-cols{grid-template-columns:minmax(0,1fr);gap:0}}

/* ---------- калькулятор колодцев: три типоразмера ---------- */
.calc-row{padding:0 0 16px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.calc-row:last-of-type{border-bottom:0;margin-bottom:0;padding-bottom:4px}
.calc-row-title{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);
  font-weight:500;margin:0 0 12px}
.calc-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.calc-row .check{margin-top:10px;font-size:14px}
.checks-cond{margin-top:22px}
@media (max-width:980px){.calc-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.calc-grid-3{grid-template-columns:minmax(0,1fr)}}
.calc-grid .field{min-width:0}
.calc-grid .field input{width:100%;min-width:0;box-sizing:border-box}
.calc-in-card .calc-row .check{font-size:13.5px}
.calc-in-card input{padding:10px 12px;font-size:15px}

/* ---- переключатель способов расчёта ---- */
.mode-seg{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border:1px solid rgba(26,26,26,.22);border-radius:0;padding:4px;margin:0 0 26px;
  background:rgba(255,255,255,.45)}
.mode-ind{position:absolute;top:4px;left:4px;width:calc((100% - 8px)/3);height:calc(100% - 8px);
  background:var(--ink);border-radius:0;transition:transform .34s cubic-bezier(.16,1,.3,1);
  pointer-events:none}
.mode-btn{position:relative;z-index:1;appearance:none;background:none;border:0;cursor:pointer;
  padding:9px 6px;font:inherit;font-size:12px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-soft);border-radius:0;transition:color .2s ease}
.mode-btn:hover{color:var(--ink)}
.mode-btn.is-on{color:var(--paper)}
.mode-btn.is-on:hover{color:var(--paper)}
.calc-grid-4{grid-template-columns:repeat(4,1fr)}
.calc-row-title .d-wrap{float:right;text-transform:none;letter-spacing:0;font-weight:400;
  color:var(--ink-soft);font-size:13px}
.d-inline{width:64px;display:inline-block;padding:5px 8px !important;font-size:14px !important;
  text-align:center}
.calc-row-note{text-transform:none;letter-spacing:0;font-weight:400;color:var(--ink-soft);font-size:12.5px}
@media (max-width:560px){.mode-btn{font-size:11px;letter-spacing:.03em;padding:8px 4px}
  .calc-grid-4{grid-template-columns:repeat(2,1fr)}}

/* согласие на обработку персональных данных в формах */
.consent{display:flex;gap:10px;align-items:flex-start;margin:2px 0 4px;
  text-transform:none;letter-spacing:normal;font-size:13px;cursor:pointer}
.consent input[type=checkbox]{flex:0 0 auto;width:17px;height:17px;margin:2px 0 0;
  accent-color:var(--ink);cursor:pointer}
.consent span{font-size:13px;line-height:1.5;color:var(--ink-soft)}
.consent a{color:var(--ink)}
.consent.consent-err span{color:#8c2b20}
.consent.consent-err input[type=checkbox]{outline:2px solid #8c2b20;outline-offset:2px}

/* уведомление об использовании cookie */
.cookie{position:fixed;left:0;right:0;bottom:0;z-index:120;
  background:rgba(236,235,231,.97);border-top:1px solid var(--line-strong);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  box-shadow:0 -14px 34px -18px rgba(26,26,26,.3);
  transform:translateY(100%);transition:transform .38s cubic-bezier(.16,1,.3,1)}
.cookie.is-open{transform:translateY(0)}
.cookie-in{max-width:1180px;margin:0 auto;padding:18px 26px;
  display:flex;gap:22px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cookie p{font-size:13px;line-height:1.55;margin:0;max-width:76ch;color:var(--ink-soft)}
.cookie p a{color:var(--ink)}
.cookie-act{display:flex;gap:12px;align-items:center;flex-shrink:0}
.cookie-act .chip{padding:10px 18px;font-size:13px}
@media (max-width:700px){
  .cookie-in{padding:16px 18px;gap:14px}
  .cookie-act{width:100%}
  .cookie-act .chip{flex:1 1 auto;text-align:center}
}