/* Газкомм v7 — «Путь газа». Black page, white line-art scene, brand blue + gas cyan. */
@font-face{font-family:"Gilroy";src:local("Gilroy-ExtraBold"),url("assets/fonts/Gilroy-ExtraBold.woff2") format("woff2");font-weight:800;font-display:swap}
@font-face{font-family:"Gilroy";src:local("Gilroy-Medium"),url("assets/fonts/Gilroy-Medium.woff2") format("woff2");font-weight:500;font-display:swap}
:root{
  --ink:#05080F; --ink-2:#0C1322; --white:#fff; --blue:#0797D5; --blue-deep:#00477D; --cyan:#6FD6FF;
  --w80:rgb(255 255 255 / .8); --w55:rgb(255 255 255 / .55); --wl:rgb(255 255 255 / .12);
  --f:"Gilroy","Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ease:cubic-bezier(.22,1,.36,1);
  --side:clamp(16px,4vw,64px);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{background:var(--ink);scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--ink);color:#fff;font:500 16px/1.55 var(--f);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}
p{margin:0;text-wrap:pretty}
h1,h2{margin:0;text-wrap:balance}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.ico{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.sprite{position:absolute;width:0;height:0}
.wrap{max-width:1360px;margin:0 auto;padding-left:max(var(--side),env(safe-area-inset-left,0px));padding-right:max(var(--side),env(safe-area-inset-right,0px))}

#scene{position:fixed;inset:0;width:100%;height:100%;display:block;z-index:0}

/* type: one size for all block titles */
.hero-h{font-weight:800;font-size:clamp(2.6rem,6.6vw,6.4rem);line-height:.95;letter-spacing:-.045em}
.hero-h span{color:var(--cyan)}
.h{font-weight:800;font-size:clamp(2rem,3.8vw,3.6rem);line-height:1;letter-spacing:-.035em}
.txt{color:var(--w80);font-size:clamp(16px,1.2vw,18px);max-width:44ch}
.small{font-size:13px;color:var(--w55)}
.kicker{font-size:14px;color:var(--cyan);font-weight:500;display:flex;gap:10px;align-items:center}
.kicker b{font-weight:800;display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;box-shadow:inset 0 0 0 1px var(--cyan)}

/* buttons */
.btn{position:relative;overflow:hidden;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:54px;padding:0 26px;border-radius:999px;border:0;font:700 15px/1 var(--f);text-decoration:none;cursor:pointer;white-space:nowrap;color:#fff}
.btn .ico{transition:transform 520ms var(--ease)}
.btn::before{content:"";position:absolute;inset:0;z-index:-1;transform:scaleX(0);transform-origin:left;transition:transform 500ms var(--ease)}
.btn:hover::before{transform:scaleX(1)}
.btn:hover .ico{transform:translateX(4px)}
.btn--blue{background:var(--blue)}
.btn--blue::before{background:var(--blue-deep)}
.btn--line{background:transparent;box-shadow:inset 0 0 0 1.5px rgb(255 255 255 / .5)}
.btn--line::before{background:rgb(111 214 255 / .16)}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px}

/* header */
.hdr{position:fixed;inset:0 0 auto;z-index:20;display:flex;align-items:center;gap:24px;padding:calc(env(safe-area-inset-top,0px) + 18px) max(var(--side),env(safe-area-inset-right,0px)) 0 max(var(--side),env(safe-area-inset-left,0px));pointer-events:none}
.hdr>*{pointer-events:auto}
.logo{display:flex;color:#fff}
.logo svg{height:30px;width:auto}
.tel{margin-left:auto;font-weight:700;font-size:14px;text-decoration:none}
.hdr-cta{min-height:44px;padding:0 20px;font-size:14px}
@media (max-width:640px){.tel{display:none}.hdr-cta{margin-left:auto}}

/* progress rail */
.rail{position:fixed;right:max(var(--side),env(safe-area-inset-right,0px));top:50%;transform:translateY(-50%);z-index:20;display:grid;gap:14px;transition:opacity 420ms var(--ease)}
.rail a{display:flex;align-items:center;justify-content:flex-end;gap:12px;text-decoration:none;font-size:13px;color:var(--w55);flex-direction:row-reverse}
.rail i{width:10px;height:10px;border-radius:50%;box-shadow:inset 0 0 0 1.5px var(--w55);transition:background 320ms var(--ease),box-shadow 320ms var(--ease),transform 320ms var(--ease)}
.rail span{opacity:0;transform:translateX(6px);transition:opacity 320ms var(--ease),transform 320ms var(--ease)}
.rail a.is-on{color:#fff}
.rail a.is-on i{background:var(--cyan);box-shadow:none;transform:scale(1.3)}
.rail a.is-on span,.rail:hover span{opacity:1;transform:none}
.rail.is-off{opacity:0;pointer-events:none}
@media (max-width:760px){.rail{right:10px}.rail span{display:none}}

/* story */
.story{position:relative;z-index:1}
.step{height:100svh;display:flex;align-items:flex-end;padding:0 max(var(--side),env(safe-area-inset-right,0px)) clamp(36px,8vh,96px) max(var(--side),env(safe-area-inset-left,0px));pointer-events:none}
.step .panel{pointer-events:auto;max-width:620px;display:grid;gap:20px;opacity:0;transform:translateY(24px);transition:opacity 700ms var(--ease),transform 900ms var(--ease)}
.step.is-in .panel{opacity:1;transform:none}
.step--hero .panel{max-width:900px}
.step:not(.step--hero) .panel{padding:clamp(22px,2.4vw,32px);border-radius:24px;background:rgb(5 8 15 / .55);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:inset 0 0 0 1px var(--wl)}
.prices{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.prices li{display:grid;gap:2px;padding:12px 14px;border-radius:14px;box-shadow:inset 0 0 0 1px var(--wl)}
.prices b{font-weight:800;font-size:20px;letter-spacing:-.02em}
.prices span{font-size:12px;color:var(--w55)}
.prices em{font-style:normal;font-size:14px;font-weight:700;color:var(--cyan);margin-top:6px}
@media (prefers-reduced-motion:reduce){.step .panel{transition:none}}
@media (max-width:640px){
  .step{align-items:flex-end;padding-bottom:28px}
  .cta-row{flex-direction:column;align-items:stretch}
  .prices{grid-template-columns:1fr 1fr 1fr}
  .prices li{padding:10px}
}
html:not(.scene-on) .step .panel{opacity:1;transform:none}

/* after the story: solid page over the scene */
.after{position:relative;z-index:2;background:var(--ink);box-shadow:0 -80px 80px var(--ink)}
.stats{display:grid;grid-template-columns:repeat(4,auto);justify-content:space-between;gap:28px;padding-block:clamp(64px,8vw,120px);border-bottom:1px solid var(--wl)}
.stats div{display:grid;gap:6px}
.stats b{font-weight:800;font-size:clamp(2.6rem,5vw,4.8rem);line-height:.95;letter-spacing:-.045em;font-variant-numeric:tabular-nums}
.stats span{font-size:14px;color:var(--w55)}
@media (max-width:700px){.stats{grid-template-columns:1fr auto}}

.contact{display:grid;grid-template-columns:6fr 5fr;gap:40px 72px;padding-block:clamp(64px,8vw,120px)}
.contact .txt{margin-top:20px}
.cts{margin:36px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:20px 28px}
.cts dt{font-size:13px;color:var(--w55)}
.cts dd{margin:4px 0 0;font-weight:700;overflow-wrap:anywhere;user-select:all}
.cts dd a{text-decoration:none}
.cts dd.big{font-weight:800;font-size:clamp(24px,2.2vw,32px);letter-spacing:-.03em}
.form{display:grid;gap:18px;align-content:start;padding:clamp(22px,2.6vw,36px);border-radius:24px;background:var(--ink-2);box-shadow:inset 0 0 0 1px var(--wl)}
.fld{display:grid;gap:8px}
.fld>label,.fld>.lbl{font-size:13px;color:var(--w55)}
.fld input{height:56px;border:0;border-radius:16px;background:rgb(255 255 255 / .06);font:600 17px var(--f);color:#fff;padding:0 18px;color-scheme:dark}
.fld input:focus{outline:none;box-shadow:inset 0 0 0 2px var(--blue)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips input{position:absolute;opacity:0;pointer-events:none}
.chips label{display:inline-flex;align-items:center;min-height:42px;padding:0 16px;border-radius:999px;background:rgb(255 255 255 / .06);font-size:14px;cursor:pointer;transition:background 320ms var(--ease),color 320ms var(--ease)}
.chips input:checked+label{background:#fff;color:var(--ink)}
.chips input:focus-visible+label{outline:2px solid var(--cyan);outline-offset:2px}
.err{font-size:13px;color:#FF8A80}
.ok{background:rgb(255 255 255 / .06);border-radius:14px;padding:14px 16px;font-size:14px}
.form small{font-size:12px;color:var(--w55)}
.form .btn{width:100%}
@media (max-width:900px){.contact{grid-template-columns:1fr}}
@media (max-width:440px){.cts{grid-template-columns:1fr}}

.foot{overflow:hidden;padding-top:24px}
.foot-row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-row a{text-decoration:none}
.wordmark{font-weight:800;font-size:22.5vw;line-height:.78;letter-spacing:-.06em;color:var(--blue);text-align:center;margin-top:24px;transform:translateY(8%);user-select:none;white-space:nowrap}