/* LINIA v2 — по референсу LITHIUM: белая рамка, монохром, тонкий шрифт, заглавные, контурные «пилюли» */
@font-face{font-family:"Inter Tight";src:url(../fonts/InterTight-Light.woff2) format("woff2");font-weight:300;font-display:swap}
@font-face{font-family:"Inter Tight";src:url(../fonts/InterTight-Regular.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Inter Tight";src:url(../fonts/InterTight-Medium.woff2) format("woff2");font-weight:500;font-display:swap}

:root{
 --ink:#2E2E2E;
 --muted:#8A8A8A;
 --line:#DADADA;
 --gray:#F0F0F0;
 --white:#FFFFFF;
 --frame:75px;          /* ширина белой рамки: шапка сверху и полоса слева */
 --pad:clamp(20px,6vw,92px);
 --ease:cubic-bezier(.47,.13,.17,1);
 --shade:linear-gradient(180deg,rgba(0,0,0,.28),rgba(0,0,0,0) 30%,rgba(0,0,0,.08) 55%,rgba(0,0,0,.55));
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--frame);scroll-snap-type:y proximity;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--white);color:var(--ink);font:300 15px/1.6 "Inter Tight",system-ui,sans-serif;overflow-x:hidden}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
h1,h2,h3,p,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
svg{width:1em;height:1em;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;flex:none}
[hidden]{display:none!important}
:focus-visible{outline:1px solid var(--ink);outline-offset:3px}

/* ---------- типографика ---------- */
.label{font-size:10.5px;font-weight:400;letter-spacing:.08em;text-transform:uppercase;line-height:1.2}
.title{font-size:clamp(22px,2.1vw,32px);font-weight:300;line-height:1.2;text-transform:uppercase}
.h2{font-size:clamp(16px,1.35vw,20px);font-weight:300;line-height:1.2;text-transform:uppercase;letter-spacing:.01em}
.note{margin-top:22px;font-size:12px;color:var(--muted)}

/* ---------- кнопка-«пилюля» с контуром ---------- */
.pill{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:30px;padding:0 16px;border:1px solid var(--ink);border-radius:0;font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;transition:background .3s,color .3s,border-color .3s}
.pill:hover{background:var(--ink);color:#fff}
.pill--white{border-color:#fff;color:#fff}
.pill--white:hover{background:#fff;color:var(--ink)}
.pill--dark{background:var(--ink);color:#fff}
.pill--dark:hover{background:transparent;color:var(--ink)}

/* ---------- рамка: шапка ---------- */
.hdr{position:fixed;top:0;left:0;right:0;z-index:40;height:var(--frame);display:flex;align-items:center;gap:28px;padding:0 40px 0 var(--frame);background:#fff}
.logo{position:absolute;left:50%;transform:translateX(-50%);font-size:15px;font-weight:400;letter-spacing:.42em;margin-right:-.42em}
.hdr__nav{display:flex;gap:26px;margin-left:auto}
.hdr__nav a,.hdr__tel{font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase;transition:opacity .2s}
.hdr__nav a:hover,.hdr__tel:hover{opacity:.55}
.hdr__nav a.is-cur{text-decoration:underline;text-underline-offset:5px}
.lang{display:flex;gap:2px;font-size:10.5px;font-weight:400}
.lang b,.lang a{padding:4px 6px}
.lang b{border:1px solid var(--ink);border-radius:0}
.lang a{color:var(--muted)}.lang a:hover{color:var(--ink)}
.hdr__burger{display:none}

/* ---------- рамка: полоса слева ---------- */
.rail{position:fixed;left:0;top:0;bottom:0;z-index:45;width:var(--frame);background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center}
.rail__next{position:absolute;bottom:22px;width:36px;height:36px;display:grid;place-items:center;font-size:18px;transition:transform .5s var(--ease)}
.rail__next.is-up{transform:rotate(180deg)}
.burger{width:36px;height:36px;position:relative}
.burger span{position:absolute;left:8px;right:8px;height:1px;background:var(--ink);transition:transform .35s var(--ease)}
.burger span:first-child{top:14px}.burger span:last-child{top:21px}
.burger[aria-expanded=true] span:first-child{transform:translateY(3.5px) rotate(45deg)}
.burger[aria-expanded=true] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- меню на весь экран ---------- */
.menu{position:fixed;inset:var(--frame) 0 0 var(--frame);z-index:35;background:#fff;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;padding:clamp(32px,6vh,72px) var(--pad);opacity:0;visibility:hidden;transform:translateY(-16px);transition:opacity .45s var(--ease),transform .45s var(--ease),visibility .45s}
body.menu-open .menu{opacity:1;visibility:visible;transform:none}
body.menu-open{overflow:hidden}
.menu__links{display:flex;flex-direction:column;gap:4px}
.menu__links a{font-size:clamp(26px,3.4vw,48px);font-weight:300;text-transform:uppercase;line-height:1.15;transition:opacity .2s}
.menu__links:hover a{opacity:.35}.menu__links a:hover{opacity:1}
.menu__side{display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding-top:10px}
.menu__side small{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:18px}
.menu__side small:first-child{margin-top:0}
.menu__tel{font-size:24px}
.menu__msg{display:flex;gap:18px}
.menu__msg a{text-decoration:underline;text-underline-offset:4px}
.menu__side .pill{margin-top:26px}
.menu__lang{display:flex;gap:4px;margin-top:16px;font-size:12px;font-weight:400}
.menu__lang b,.menu__lang a{padding:4px 10px;border-radius:0}
.menu__lang b{border:1px solid var(--ink)}
.menu__lang a{color:var(--muted)}

/* ---------- основной поток ---------- */
.main,.ftr{margin-left:var(--frame)}
.main{padding-top:var(--frame)}
.scr{scroll-snap-align:start}

/* полноэкранная секция: фото или видео в рамке, текст слева внизу */
.full{position:relative;height:calc(100vh - var(--frame));height:calc(100svh - var(--frame));min-height:520px;overflow:hidden;background:#222;color:#fff}
.full__media{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scale(1.06);transition:transform 2.4s var(--ease)}
.full.is-in .full__media{transform:none}
.full::after{content:"";position:absolute;inset:0;background:var(--shade);pointer-events:none}
.full--bw .full__media{filter:grayscale(1) contrast(1.05)}
.full__txt{position:absolute;z-index:1;left:var(--pad);right:var(--pad);bottom:clamp(36px,8vh,80px);display:grid;justify-items:start;gap:12px}
.full__txt .desc{font-size:13px;opacity:.85;max-width:46ch}
.full__txt .pill{margin-top:8px}

/* появление текста по очереди, как у LITHIUM: подпись → заголовок → текст → кнопка */
[data-anim] > *{opacity:0;transform:translateY(28px);transition:transform .7s ease-out,opacity .25s ease-out}
[data-anim].is-in > *{opacity:1;transform:none}
[data-anim].is-in > *:nth-child(1){transition-delay:.3s}
[data-anim].is-in > *:nth-child(2){transition-delay:.45s}
[data-anim].is-in > *:nth-child(3){transition-delay:.6s}
[data-anim].is-in > *:nth-child(4){transition-delay:.75s}

/* белая или серая секция: заголовок слева, «пилюля» справа, контент ниже */
.blocks{padding:clamp(64px,11vh,120px) var(--pad)}
.blocks--gray{background:var(--gray)}
.blocks__head{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:clamp(28px,4vh,44px)}

/* ---------- что делаем ---------- */
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cat{display:grid;gap:14px}
.cat__ph{display:block;aspect-ratio:4/5;overflow:hidden;background:var(--gray)}
.cat__ph img{width:100%;height:100%;object-fit:cover;transition:transform 1.4s var(--ease)}
.cat:hover .cat__ph img{transform:scale(1.05)}
.cat__cap{display:flex;justify-content:space-between;gap:12px;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase}
.cat__cap b{font-weight:400}
.cat__cap small{font-size:inherit;color:var(--muted)}

/* ---------- проекты ---------- */
.projs{display:grid;grid-template-columns:1fr 1fr;gap:28px 16px}
.proj__ph{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;background:var(--gray)}
.proj__ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:opacity .9s var(--ease),transform 1.6s var(--ease)}
.proj__alt{opacity:0}
.proj:hover .proj__alt{opacity:1}
.proj:hover .proj__ph img{transform:scale(1.03)}
.proj__cap{display:flex;justify-content:space-between;gap:16px;margin-top:12px;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase}
.proj__cap b{font-weight:400}
.proj__cap span{color:var(--muted);text-align:right}

/* ---------- калькулятор ---------- */
.calc-wrap{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:clamp(28px,5vw,80px);align-items:start}
.calc-wrap__txt{display:grid;gap:22px;color:#555}
.checks{display:grid;gap:8px}
.checks li{position:relative;padding-left:22px;font-size:13px}
.checks li::before{content:"";position:absolute;left:0;top:10px;width:12px;height:1px;background:var(--ink)}
.calc{background:#fff;padding:clamp(20px,3vw,40px);display:grid;gap:22px}
.seg{display:flex;gap:6px;flex-wrap:wrap}
.seg button,.chips button{height:30px;padding:0 16px;border:1px solid var(--line);border-radius:0;font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase;transition:border-color .2s,background .2s,color .2s}
.seg button:hover,.chips button:hover{border-color:var(--ink)}
.seg button.is-on,.chips button.is-on{background:var(--ink);border-color:var(--ink);color:#fff}
.calc__pane{display:grid;gap:22px}
.field{display:grid;gap:10px}
.field__lbl{display:flex;justify-content:space-between;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.field__lbl output{color:var(--ink);font-size:13px;letter-spacing:0}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips--col button{height:auto;padding:8px 16px;display:grid;gap:1px;text-align:left;border-radius:0}
.chips--col small{font-size:10px;letter-spacing:0;text-transform:none;opacity:.6}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:22px;background:transparent}
input[type=range]::-webkit-slider-runnable-track{height:1px;background:linear-gradient(var(--ink),var(--ink)) 0/var(--p,50%) 100% no-repeat,var(--line)}
input[type=range]::-moz-range-track{height:1px;background:var(--line)}
input[type=range]::-moz-range-progress{height:1px;background:var(--ink)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:0;background:var(--ink);margin-top:-6.5px}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border:0;border-radius:0;background:var(--ink)}
.opts{display:flex;flex-wrap:wrap;gap:6px}
.opts label{cursor:pointer}
.opts input{position:absolute;opacity:0;pointer-events:none}
.opts span{display:inline-flex;align-items:center;height:30px;padding:0 16px;border:1px solid var(--line);border-radius:0;font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase;transition:border-color .2s,background .2s,color .2s}
.opts input:checked+span{background:var(--ink);border-color:var(--ink);color:#fff}
.opts input:focus-visible+span{outline:1px solid var(--ink);outline-offset:2px}
.calc__res{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;border-top:1px solid var(--line)}
.calc__res small{display:block;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.calc__res small#calc-lei{text-transform:none;letter-spacing:0;font-size:12px}
.calc__sum{display:block;font-size:clamp(26px,2.4vw,34px);font-weight:300;line-height:1.2;margin:4px 0 2px}
/* в калькуляторе первой версии кнопка — .btn; здесь она «пилюля» */
.calc .btn{display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 20px;border-radius:0;background:var(--ink);color:#fff;font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--ink);transition:background .3s,color .3s}
.calc .btn:hover{background:transparent;color:var(--ink)}
.calc .btn svg{display:none}

/* ---------- этапы ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.steps li{display:grid;gap:12px;align-content:start;padding-top:18px;border-top:1px solid var(--ink)}
.steps__n{font-size:10.5px;letter-spacing:.08em;color:var(--muted)}
.steps b{font-weight:400;font-size:13px;text-transform:uppercase;letter-spacing:.03em}
.steps p{font-size:13px;color:#555}

/* ---------- материалы ---------- */
.mats{display:grid;grid-template-columns:1fr 1fr;gap:0 clamp(28px,5vw,80px)}
.mats__list > div{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.4fr);gap:20px;padding:16px 0;border-top:1px solid var(--line)}
.mats__list dt{font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase;padding-top:3px}
.mats__list dd{font-size:13px;color:#555}

/* ---------- две карточки ---------- */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.duo__item{display:grid;gap:14px;justify-items:start;align-content:start}
.duo__ph{display:block;width:100%;aspect-ratio:16/9;overflow:hidden}
.duo__ph img{width:100%;height:100%;object-fit:cover}
.duo__item p{font-size:12px;color:#555;max-width:62ch}

/* ---------- вопросы ---------- */
.faq{display:grid;grid-template-columns:1fr 1fr;gap:0 clamp(28px,5vw,80px)}
.qa{border-top:1px solid var(--line)}
.qa summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0;font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"";flex:none;width:11px;height:11px;background:linear-gradient(var(--ink),var(--ink)) center/100% 1px no-repeat,linear-gradient(var(--ink),var(--ink)) center/1px 100% no-repeat;transition:transform .35s var(--ease)}
.qa[open] summary::after{transform:rotate(45deg)}
.qa p{padding:0 0 18px;font-size:13px;color:#555;max-width:60ch}

/* ---------- контакты ---------- */
.contact{display:grid;grid-template-columns:1fr 1fr;min-height:calc(100svh - var(--frame));background:var(--gray)}
.contact__ph{position:relative;overflow:hidden;min-height:360px}
.contact__ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.contact__body{padding:clamp(40px,8vh,88px) var(--pad);display:grid;align-content:center;justify-items:start;gap:16px}
.label--dark{color:var(--muted)}
.contact__lead{font-size:13px;color:#555;max-width:42ch}
.form{width:100%;max-width:440px;display:grid;gap:4px;margin-top:8px}
.inp{display:grid;gap:2px;border-bottom:1px solid #C9C9C9;padding:10px 0 6px}
.inp span{font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.inp input,.inp select,.inp textarea{width:100%;border:0;background:transparent;padding:4px 0;font-size:15px;outline:none;resize:vertical}
.inp:focus-within{border-color:var(--ink)}
.inp.is-err{border-color:#C0392B}
.form .pill{margin-top:22px;height:36px;justify-self:start;padding:0 24px}
.form__note{font-size:11px;color:var(--muted);margin-top:6px}

/* ---------- подвал ---------- */
.ftr{background:var(--gray);padding:clamp(40px,7vh,72px) var(--pad) 28px;border-top:1px solid #fff}
.ftr__cols{display:grid;grid-template-columns:repeat(3,minmax(0,.7fr)) minmax(0,1.3fr);gap:28px}
.ftr__cols > div{display:flex;flex-direction:column;align-items:flex-start;gap:6px;font-size:12px}
.ftr__cols .label{margin-bottom:8px}
.ftr__cols a:not(.pill):hover{opacity:.55}
.ftr__end{gap:10px!important}
.ftr__end p{font-size:12px;color:#555;max-width:42ch;margin-bottom:6px}
.ftr__end .pill{width:100%;max-width:300px}
.ftr__bot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:44px;font-size:10.5px;color:var(--muted)}
.ftr__bot a{text-decoration:underline;text-underline-offset:4px}

.mbar{display:none}

/* ---------- адаптив ---------- */
@media (max-width:1180px){
 .hdr__nav{gap:18px}
 .cats{grid-template-columns:repeat(2,1fr)}
 .steps{grid-template-columns:repeat(3,1fr);row-gap:28px}
}
@media (max-width:1000px){
 :root{--frame:56px}
 .rail{display:none}
 .main,.ftr{margin-left:0}
 .hdr{padding:0 12px 0 20px}
 .logo{position:static;transform:none}
 .hdr__nav,.hdr__tel{display:none}
 .lang{margin-left:auto}
 .hdr__burger{display:block}
 .menu{inset:var(--frame) 0 0 0;grid-template-columns:1fr;align-content:start;overflow-y:auto}
 .calc-wrap,.mats,.faq,.contact{grid-template-columns:minmax(0,1fr)}
 .contact__ph{min-height:46vh}
}
@media (max-width:640px){
 :root{--pad:16px}
 body{padding-bottom:64px}
 .full{height:calc(100svh - var(--frame) - 64px);min-height:480px}
 .full__txt{bottom:28px}
 .blocks__head{flex-direction:column;align-items:flex-start;gap:14px}
 .cats,.projs,.duo{grid-template-columns:minmax(0,1fr)}
 .cats{gap:22px}
 .cat__ph{aspect-ratio:4/3}
 .steps{grid-template-columns:minmax(0,1fr)}
 .mats__list > div{grid-template-columns:minmax(0,1fr);gap:6px}
 .proj__cap{flex-direction:column;gap:4px}
 .proj__cap span{text-align:left}
 .ftr__cols{grid-template-columns:1fr 1fr}
 .ftr__end{grid-column:1/-1}
 .mbar{display:grid;grid-template-columns:1fr 1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:50;height:64px;background:#fff;border-top:1px solid var(--line)}
 .mbar a{display:flex;align-items:center;justify-content:center;gap:8px;font-size:10.5px;font-weight:400;letter-spacing:.06em;text-transform:uppercase}
 .mbar svg{font-size:16px}
 .mbar .mbar__dark{background:var(--ink);color:#fff}
}
@media (prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*::before,*::after{transition-duration:.01ms!important;transition-delay:0s!important}
 [data-anim] > *{opacity:1;transform:none}
}

/* оптическая центровка: у заглавных нет нижних выносных, поэтому текст в кнопках сидит на ~1px выше центра — опускаем */
.pill,.form .pill,.seg button,.chips button:not(.chips--col button),.opts span,.calc .btn,.mbar a,.lang b,.lang a{padding-top:.22em}