/* =====================================================================
   Уфафотохим · дизайн-система ufh.css
   Тем: light (цветная, по умолчанию) + darkroom (переключатель)
   Без Bootstrap / jQuery / Themler-стилей
   ===================================================================== */

/* ---------- токены ---------- */
:root{
  --ff-display:"Playfair Display",Georgia,"Times New Roman",serif;
  --ff-body:"Manrope",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ff-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.75,.15,1);
  --r-s:8px; --r-m:14px; --r-l:22px;
  --wrap:1180px; --wrap-narrow:820px;
  --sp:clamp(52px,7vw,104px);
  --hdr-h:72px;
}
:root, [data-theme="light"]{
  --bg:#F6F2EA; --bg-2:#EFE8DC; --panel:#FFFDF7; --panel-2:#FBF7EE;
  --ink:#1C1712; --muted:#6B6156; --faint:#988D7E;
  --line:rgba(28,23,18,.13); --line-2:rgba(28,23,18,.26);
  --accent:#004E14; --accent-2:#00691F; --accent-soft:rgba(0,78,20,.10);
  --dev-d23:#2E7D6B; --dev-d76:#B7791F; --dev-avr:#6B4FA0; --dev-kalogen:#33689F; --dev-rodinal:#A33A44;
  --shadow:0 18px 44px rgba(60,44,26,.10);
  --grain:.028;
  --hero-glow:radial-gradient(90% 70% at 82% 0%,rgba(0,78,20,.10),transparent 62%);
  color-scheme:light;
}
[data-theme="darkroom"]{
  --bg:#0B0C0E; --bg-2:#101216; --panel:#15181D; --panel-2:#191D23;
  --ink:#E9E6E0; --muted:#9BA1A9; --faint:#6E747C;
  --line:rgba(255,255,255,.10); --line-2:rgba(255,255,255,.22);
  --accent:#E8412F; --accent-2:#FF6B4A; --accent-soft:rgba(232,65,47,.13);
  --dev-d23:#4FB39A; --dev-d76:#D9A441; --dev-avr:#9B7FD4; --dev-kalogen:#6FA3D8; --dev-rodinal:#E17A82;
  --shadow:0 24px 60px rgba(0,0,0,.5);
  --grain:.055;
  --hero-glow:radial-gradient(90% 70% at 80% 0%,rgba(232,65,47,.16),transparent 60%);
  color-scheme:dark;
}
/* цвет проявителя на страницах продуктов */
body[data-dev="d23"]{--dev:var(--dev-d23)} body[data-dev="d76"]{--dev:var(--dev-d76)}
body[data-dev="avr"]{--dev:var(--dev-avr)} body[data-dev="kalogen"]{--dev:var(--dev-kalogen)} body[data-dev="rodinal"]{--dev:var(--dev-rodinal)}
:root{--dev:var(--accent)}

/* ---------- база ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--ff-body);font-size:17px;line-height:1.7;font-weight:400;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  transition:background .45s var(--ease),color .45s var(--ease);
}
body::after{ /* зерно плёнки */
  content:"";position:fixed;inset:0;z-index:9998;pointer-events:none;opacity:var(--grain);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode:overlay;
}
img,svg{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--ff-display);font-weight:600;line-height:1.1;letter-spacing:-.015em;margin:0}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin-bottom:.4em}
b,strong{font-weight:700;color:var(--ink)}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.wrap{width:min(var(--wrap),92vw);margin-inline:auto}
.wrap-narrow{width:min(var(--wrap-narrow),92vw);margin-inline:auto}
.mono{font-family:var(--ff-mono)}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:10px 18px;z-index:9999;border-radius:0 0 8px 0}
.skip:focus{left:0}

/* ---------- верхняя панель «Поделиться» ---------- */
.share-strip{position:relative;z-index:2;border-bottom:1px solid var(--line);background:var(--bg-2)}
.share-strip__inner{min-height:58px;display:flex;align-items:center;gap:18px;padding-block:8px}
.share-strip__title{flex:0 0 auto;color:var(--faint);font:600 10px/1.3 var(--ff-mono);letter-spacing:.16em;text-transform:uppercase}
.share-strip__actions{display:flex;align-items:center;flex-wrap:wrap;gap:7px}
.share-action{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:7px 12px;border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--muted);font:600 12px/1.2 var(--ff-body);cursor:pointer;transition:color .18s,border-color .18s,background .18s,transform .18s}
.share-action:hover{transform:translateY(-1px);color:var(--ink);border-color:var(--line-2)}
.share-action--telegram:hover{color:#168ac4;border-color:#168ac4}
.share-action--vk:hover{color:#2787f5;border-color:#2787f5}
.share-action--whatsapp:hover{color:#1b9d57;border-color:#1b9d57}
.share-action--copy{background:transparent}
.share-action--native{color:var(--dev,var(--accent))}
.share-action--native[hidden]{display:none!important}
.share-strip__status{min-width:0;color:var(--dev,var(--accent));font:500 11px/1.3 var(--ff-mono)}
@media(max-width:640px){
  .share-strip__inner{align-items:flex-start;flex-direction:column;gap:8px;padding-block:10px}
  .share-strip__actions{gap:6px}
  .share-action{min-height:32px;padding:6px 10px;font-size:11px}
  .share-strip__status{min-height:0}
}

/* ---------- типографика ---------- */
.h1{font-size:clamp(38px,6vw,74px);letter-spacing:-.03em;line-height:1.02}
.h2{font-size:clamp(28px,3.8vw,46px)}
.h3{font-size:clamp(20px,2.2vw,26px)}
.lead{color:var(--muted);font-size:clamp(16px,1.4vw,19px);line-height:1.65;max-width:60ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:.7em;margin:0 0 14px;
  font:600 11px/1 var(--ff-mono);letter-spacing:.22em;text-transform:uppercase;
  color:var(--dev,var(--accent));
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;opacity:.65}

/* ---------- кнопки / чипы ---------- */
.btn{
  --h:46px;display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  height:var(--h);padding:0 1.4em;border-radius:var(--r-s);border:1px solid var(--line-2);
  background:transparent;color:var(--ink);cursor:pointer;white-space:nowrap;
  font:600 14px/1 var(--ff-body);letter-spacing:.01em;transition:.25s var(--ease);
}
.btn:hover{border-color:var(--dev,var(--accent));color:var(--dev,var(--accent));transform:translateY(-1px)}
.btn--primary{background:var(--dev,var(--accent));border-color:var(--dev,var(--accent));color:#fff;box-shadow:0 12px 26px -14px var(--dev,var(--accent))}
.btn--primary:hover{filter:brightness(1.08);color:#fff}
.btn--sm{--h:38px;padding:0 1em;font-size:13px}
.nav a{white-space:nowrap}
.chip{
  display:inline-block;padding:.42em .95em;border:1px solid var(--line);border-radius:999px;
  font:500 12.5px/1.2 var(--ff-body);color:var(--muted);transition:.22s var(--ease);
}
.chip:hover{color:var(--dev,var(--accent));border-color:var(--dev,var(--accent))}
.chip--s{font-size:11.5px;padding:.36em .8em}
.chip--m{font-size:13px}
.chip--l{font-size:14.5px;padding:.46em 1.05em;color:var(--ink)}
.tag{
  display:inline-block;padding:.32em .75em;border-radius:999px;
  background:var(--accent-soft);color:var(--dev,var(--accent));
  font:600 11px/1.3 var(--ff-mono);letter-spacing:.1em;text-transform:uppercase;
}

/* ---------- шапка ---------- */
.hdr{
  position:sticky;top:0;z-index:60;height:var(--hdr-h);
  background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:blur(14px) saturate(150%);-webkit-backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid transparent;transition:border-color .3s,background .3s;
}
.hdr.is-stuck{border-bottom-color:var(--line)}
.hdr__in{display:flex;align-items:center;gap:26px;height:100%}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__logo{width:38px;height:38px;flex:0 0 auto;object-fit:contain}
[data-theme="light"] .brand__logo--dark{display:none}
[data-theme="darkroom"] .brand__logo--light{display:none}
.ftr .brand__logo{width:34px;height:34px}
.brand__name{font-family:var(--ff-display);font-weight:700;font-size:19px;letter-spacing:.01em;line-height:1}
.brand__sub{display:block;margin-top:4px;font:500 9.5px/1 var(--ff-mono);letter-spacing:.2em;text-transform:uppercase;color:var(--faint)}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav>li{list-style:none;position:relative}
.nav a,.nav button{
  display:flex;align-items:center;gap:6px;padding:9px 13px;border:0;background:none;cursor:pointer;
  color:var(--muted);font:600 14px/1.2 var(--ff-body);border-radius:var(--r-s);transition:.22s;
}
.nav a:hover,.nav button:hover{color:var(--ink);background:var(--accent-soft)}
.nav a[aria-current="page"]{color:var(--dev,var(--accent))}
.nav .caret{width:9px;height:9px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:.25s}
.nav li.open>.sub-btn .caret{transform:rotate(-135deg) translateY(-2px)}
.nav ul{
  position:absolute;top:calc(100% + 8px);left:0;min-width:270px;margin:0;padding:8px;list-style:none;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:.25s var(--ease);z-index:70;
}
.nav li.open>ul,.nav li:hover>ul{opacity:1;visibility:visible;transform:none}
.nav ul a{display:block;padding:10px 12px;border-radius:8px;font-size:13.5px;white-space:normal}
.hdr__act{display:flex;align-items:center;gap:10px;margin-left:8px}
.theme-btn{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 12px;cursor:pointer;
  border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--muted);
  font:600 11px/1 var(--ff-mono);letter-spacing:.12em;text-transform:uppercase;transition:.25s;
}
.theme-btn:hover{color:var(--dev,var(--accent));border-color:var(--dev,var(--accent))}
.theme-btn svg{width:15px;height:15px}
.theme-btn__label{white-space:nowrap}
[data-theme="light"] .theme-btn .i-moon{display:block}
[data-theme="light"] .theme-btn .i-sun{display:none}
[data-theme="darkroom"] .theme-btn .i-moon{display:none}
[data-theme="darkroom"] .theme-btn .i-sun{display:block}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-s);background:var(--panel);cursor:pointer}
.burger i{display:block;width:16px;height:1.6px;background:var(--ink);margin:3.6px auto;transition:.3s var(--ease)}
.burger[aria-expanded="true"] i:nth-child(1){transform:translateY(5.2px) rotate(45deg)}
.burger[aria-expanded="true"] i:nth-child(2){opacity:0}
.burger[aria-expanded="true"] i:nth-child(3){transform:translateY(-5.2px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(44px,6vw,88px) 0 clamp(40px,5vw,72px);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:var(--hero-glow);pointer-events:none}
.hero__in{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4.5vw,64px);align-items:center}
.hero__in>*{min-width:0}
.hero__in--center{grid-template-columns:1fr;text-align:center}
.hero h1{margin:0 0 20px}
.hero h1 em{font-style:italic;color:var(--dev,var(--accent))}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 0}
.hero__specs{list-style:none;display:flex;flex-wrap:wrap;gap:8px 22px;margin:26px 0 0;padding:0}
.hero__specs li{margin:0;font:500 12.5px/1.5 var(--ff-mono);color:var(--muted)}
.hero__specs b{color:var(--dev,var(--accent));font-weight:600}
.hero__media{margin:0;position:relative}
.hero__media img{width:100%;border-radius:var(--r-l);border:1px solid var(--line);box-shadow:var(--shadow);display:block}
.hero__media figcaption{margin-top:10px;font:500 11px/1.5 var(--ff-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}

/* Product packshots: a square responsive stage keeps the four developer pages balanced. */
body[data-dev="d76"] .hero__media,
body[data-dev="d23"] .hero__media,
body[data-dev="avr"] .hero__media,
body[data-dev="kalogen"] .hero__media,
body[data-dev="rodinal"] .hero__media{width:100%;max-width:min(100%,clamp(320px,34vw,440px));justify-self:end}
body[data-dev="d76"] .hero__product-square,
body[data-dev="d23"] .hero__product-square,
body[data-dev="avr"] .hero__product-square,
body[data-dev="kalogen"] .hero__product-square,
body[data-dev="rodinal"] .hero__product-square{width:100%;aspect-ratio:1/1;display:grid;place-items:center;overflow:hidden;padding:clamp(16px,2.2vw,28px);border:1px solid var(--line);border-radius:var(--r-l);background:var(--panel);box-shadow:var(--shadow)}
body[data-dev="d76"] .hero__product-square img,
body[data-dev="d23"] .hero__product-square img,
body[data-dev="avr"] .hero__product-square img,
body[data-dev="kalogen"] .hero__product-square img,
body[data-dev="rodinal"] .hero__product-square img{width:100%;height:100%;padding:0;border:0;border-radius:0;box-shadow:none;object-fit:contain;object-position:center}
@media(max-width:980px){
  body[data-dev="d76"] .hero__media,
  body[data-dev="d23"] .hero__media,
  body[data-dev="avr"] .hero__media,
  body[data-dev="kalogen"] .hero__media,
  body[data-dev="rodinal"] .hero__media{max-width:min(100%,420px);justify-self:center}
  body[data-dev="d76"] .hero__product-square,
  body[data-dev="d23"] .hero__product-square,
  body[data-dev="avr"] .hero__product-square,
  body[data-dev="kalogen"] .hero__product-square,
  body[data-dev="rodinal"] .hero__product-square{padding:clamp(14px,4vw,24px)}
}


/* ---------- секции ---------- */
.section{padding:var(--sp) 0}
.section--alt{background:var(--bg-2);border-block:1px solid var(--line)}
.sect-head{display:flex;align-items:flex-end;justify-content:space-between;gap:26px;flex-wrap:wrap;margin-bottom:clamp(26px,3.2vw,44px)}
.sect-head .lead{margin:0;max-width:44ch}
.filmstrip{height:22px;opacity:.45;background:
  repeating-linear-gradient(90deg,transparent 0 10px,color-mix(in srgb,var(--ink) 26%,transparent) 10px 17px);
  background-size:100% 7px;background-position:0 7px;background-repeat:repeat-x;
  border-block:1px solid var(--line-2);}

/* ---------- карточки продуктов ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cards--products{grid-template-columns:repeat(6,minmax(0,1fr))}
.cards--products>*{grid-column:span 2}
.cards--products>:nth-child(4){grid-column:2 / span 2}
.cards--products>:nth-child(5){grid-column:4 / span 2}
.card{
  position:relative;display:flex;flex-direction:column;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--r-l);padding:26px 24px 22px;overflow:hidden;
  transition:.35s var(--ease);
}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--c,var(--accent));opacity:.9}
.card::after{content:"";position:absolute;inset:0;opacity:0;transition:.4s;background:radial-gradient(100% 60% at 20% 0%,color-mix(in srgb,var(--c,var(--accent)) 12%,transparent),transparent 70%)}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--line-2)}
.card:hover::after{opacity:1}
.card>*{position:relative;z-index:1}
.card__name{font-size:clamp(24px,2.4vw,30px);margin:12px 0 10px}
.card__text{color:var(--muted);font-size:14.5px;line-height:1.6;margin:0 0 16px}
.card__meta{list-style:none;margin:auto 0 0;padding:14px 0 0;border-top:1px solid var(--line);font:500 12px/1.7 var(--ff-mono);color:var(--faint)}
.card__meta b{color:var(--ink);font-weight:600}
.card__link{display:inline-flex;align-items:center;gap:.5em;margin-top:16px;color:var(--c,var(--accent));font:700 13.5px/1 var(--ff-body)}
.card__link svg{transition:transform .3s var(--ease)}
.card:hover .card__link svg{transform:translateX(4px)}

/* ---------- списки-ссылки (материалы) ---------- */
.links{display:grid;grid-template-columns:1fr 1fr;gap:0 clamp(24px,4vw,56px)}
.linkrow{display:block;padding:20px 0;border-bottom:1px solid var(--line);transition:.3s var(--ease)}
.linkrow:first-child{border-top:1px solid var(--line)}
.linkrow:hover{padding-left:10px}
.linkrow h3{font-size:19px;margin-bottom:6px;transition:color .25s}
.linkrow:hover h3{color:var(--dev,var(--accent))}
.linkrow p{margin:0;color:var(--muted);font-size:14px}
.linkrow .tag{margin-left:8px;vertical-align:2px}

/* ---------- шаги ---------- */
.steps{counter-reset:s;list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.steps li{display:grid;grid-template-columns:88px 1fr;gap:clamp(14px,3vw,36px);padding:22px 0;border-bottom:1px solid var(--line);margin:0;transition:.3s var(--ease)}
.steps li::before{counter-increment:s;content:"0" counter(s);font:600 13px/1.6 var(--ff-mono);letter-spacing:.14em;color:var(--dev,var(--accent))}
.steps li:hover{background:linear-gradient(90deg,var(--accent-soft),transparent 65%);padding-left:12px}
.steps b{display:block;font:700 17px/1.4 var(--ff-body);margin-bottom:4px}
.steps p{margin:0;color:var(--muted);font-size:14.5px}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{cursor:pointer;list-style:none;padding:22px 44px 22px 0;position:relative;transition:.25s}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"";position:absolute;right:6px;top:30px;width:13px;height:13px;
  border-right:2px solid var(--dev,var(--accent));border-bottom:2px solid var(--dev,var(--accent));
  transform:rotate(45deg);transition:.3s var(--ease)}
.faq-list details[open] summary::after{transform:rotate(-135deg);top:36px}
.faq-list summary h2{font-size:clamp(17px,1.9vw,21px);font-weight:600;transition:color .25s}
.faq-list summary:hover h2{color:var(--dev,var(--accent))}
.faq-list details div,.faq-list details p{color:var(--muted);font-size:15.5px}
.faq-list details p{padding-right:clamp(0px,4vw,48px)}

/* ---------- футер ---------- */
.ftr{background:var(--bg-2);border-top:1px solid var(--line);padding:clamp(44px,5vw,70px) 0 30px;margin-top:0}
.ftr__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:34px}
.ftr h4{font:600 10.5px/1 var(--ff-mono);letter-spacing:.18em;text-transform:uppercase;color:var(--faint);margin:0 0 16px}
.ftr ul{list-style:none;margin:0;padding:0;font-size:14.5px}
.ftr li{margin-bottom:9px}
.ftr li a{color:var(--muted);transition:.22s}
.ftr li a:hover{color:var(--dev,var(--accent))}
.ftr__about{color:var(--muted);font-size:14px;max-width:36ch;margin:14px 0 0}
.ftr-tags{margin-top:34px;padding-top:26px;border-top:1px solid var(--line)}
.ftr-tags__in{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 10px}
.ftr__bot{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-top:22px;color:var(--faint);font-size:12.5px}
.ftr__copyright a{color:var(--muted);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--dev,var(--accent)) 55%,transparent);text-underline-offset:3px}
.ftr__copyright a:hover{color:var(--dev,var(--accent));text-decoration-color:currentColor}

/* ---------- CTA ---------- */
.cta{position:relative;overflow:hidden;border-radius:var(--r-l);background:var(--dev,var(--accent));color:#fff;padding:clamp(32px,4.6vw,60px)}
.cta::after{content:"";position:absolute;right:-70px;top:-70px;width:300px;height:300px;border:1px solid rgba(255,255,255,.25);border-radius:50%}
.cta h2{font-size:clamp(26px,3.6vw,42px);max-width:22ch}
.cta p{color:rgba(255,255,255,.85);max-width:52ch;margin:14px 0 0}
.cta .btn{border-color:rgba(255,255,255,.55);color:#fff}
.cta .btn:hover{background:#fff;color:var(--dev,var(--accent));border-color:#fff}
.cta a.mail{font:600 clamp(17px,2vw,22px)/1.4 var(--ff-mono);color:#fff;border-bottom:1px solid rgba(255,255,255,.5)}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.rv{opacity:1;transform:none}}

/* ---------- адаптив ---------- */
@media (max-width:1240px){
  .theme-btn__label{display:none}
  .theme-btn{width:38px;padding:0;justify-content:center}
}
@media (max-width:1020px){
  .cards{grid-template-columns:1fr 1fr}
  .cards--products{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cards--products>*{grid-column:auto}
  .hero__in{grid-template-columns:1fr}
  .hero__media{order:-1;max-width:560px}
  .links{grid-template-columns:1fr}
  .ftr__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:1080px){
  .nav{
    position:fixed;inset:var(--hdr-h) 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg-2);border-bottom:1px solid var(--line);padding:10px 4vw 22px;
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:.3s var(--ease);
    max-height:calc(100vh - var(--hdr-h));overflow:auto;
  }
  body.nav-open .nav{transform:none;opacity:1;visibility:visible}
  .nav a,.nav button{padding:14px 6px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0;width:100%;justify-content:flex-start}
  .nav ul{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;background:transparent;padding:0 0 0 14px;display:none}
  .nav li.open>ul{display:block}
  .nav li:hover>ul{display:none}
  .nav li.open:hover>ul{display:block}
  .nav ul a{font-size:14.5px;padding:10px 6px}
  .burger{display:block}
  .hdr__act{gap:8px;margin-left:4px}
}
@media (max-width:640px){
  body{font-size:16px}
  .cards{grid-template-columns:1fr}
  .cards--products{grid-template-columns:1fr}
  .cards--products>*{grid-column:auto}
  .brand__sub{display:none}
  .hero__specs{flex-direction:column;gap:6px}
  .ftr__grid{grid-template-columns:1fr}
  .steps li{grid-template-columns:52px 1fr}
}

/* Clickable catalog label with an independent submenu caret. */






























































/* Product navigation: link and independent disclosure share the same row. */
.nav .has-sub--catalog{display:flex;align-items:center;gap:0}
.nav .has-sub--catalog>.sub-title{padding-right:0}
.nav .has-sub--catalog>.sub-btn--caret{width:32px;padding:9px 10px;justify-content:center}
@media(max-width:1080px){
 .nav .has-sub--catalog{flex-wrap:wrap;justify-content:flex-start;flex:0 0 auto;width:100%}
 .nav .has-sub--catalog>.sub-title{width:auto;flex:0 0 auto;height:49px;padding:14px 6px}
 .nav .has-sub--catalog>.sub-btn--caret{position:static;flex:0 0 42px;width:42px;height:49px;margin:0;padding:0}
 .nav .has-sub--catalog>ul{flex:0 0 100%;width:100%;min-width:0}
}
/* Home developer cards: one set of rules, intrinsic row height. */
.home-developer-cards{grid-template-columns:repeat(6,minmax(0,1fr));align-items:stretch}
.home-developer-cards>.card{grid-column:span 2;min-width:0;height:auto;overflow-wrap:anywhere}
.home-developer-cards>.card:nth-child(4){grid-column:2/span 2}
.home-developer-cards>.card:nth-child(5){grid-column:4/span 2}
@media(max-width:1020px){
 .home-developer-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
 .home-developer-cards>.card:nth-child(n){grid-column:auto;width:auto}
 .home-developer-cards>.card:last-child{grid-column:1/-1;width:calc((100% - 14px)/2);justify-self:center}
}
@media(max-width:640px){
 .home-developer-cards{grid-template-columns:minmax(0,1fr);gap:12px}
 .home-developer-cards>.card:nth-child(n){grid-column:auto;width:100%;justify-self:stretch;padding:22px 20px 19px}
}
@media(max-width:360px){
 .hdr__in{gap:8px}
 .hdr .brand{gap:8px;min-width:0}
 .hdr .brand__name{font-size:17px}
 .hdr__act{flex:0 0 auto;gap:6px;margin-left:auto}
}