/* БіоГумус — design system (master plan §4) */
:root{
  --bg:#fff;--bg-2:#f5f5f7;--ink:#1d1d1f;--ink-p:#424245;--muted:#86868b;
  --line:rgba(0,0,0,.06);--line-2:rgba(0,0,0,.1);
  --blue:#0071e3;--blue-h:#0077ed;--bio:#30a14e;--warn:#e5484d;
  --r-card:26px;--shadow:0 4px 24px rgba(0,0,0,.04);--shadow-h:0 18px 50px rgba(0,0,0,.08);
  --max:1120px;--hh:64px;
  --font:"Inter",-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Arial,sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);
}
.bg *,.bg *::before,.bg *::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body.bg{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden}
body.bg.is-locked{overflow:hidden}
.bg a{color:inherit;text-decoration:none}
.bg img{max-width:100%;height:auto;display:block}
.bg h1,.bg h2,.bg h3{margin:0;color:var(--ink);letter-spacing:-.02em}
.bg p{margin:0}
.bg button,.bg input{font:inherit;color:inherit}
.bg-wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.bg-ico{width:22px;height:22px;flex:none}
.bg-skip{position:absolute;left:-9999px}
.bg-skip:focus{left:16px;top:16px;background:#fff;padding:10px 14px;border-radius:10px;z-index:200}
.bg :focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:8px}

/* ---------- Wordmark ---------- */
.bg-logo{display:inline-flex;align-items:center;flex:none}
.bg-wm{font-size:22px;font-weight:500;letter-spacing:-.035em;color:var(--ink);line-height:1}
.bg-wm b{font-weight:800}

/* ---------- Header ---------- */
.bg-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);border-bottom:1px solid transparent;transition:border-color .3s}
@media (hover:hover) and (min-width:1081px){.bg-header{background:rgba(255,255,255,.8);-webkit-backdrop-filter:saturate(180%) blur(18px);backdrop-filter:saturate(180%) blur(18px)}}
.bg-header.is-scrolled,.bg-header.is-open{border-color:var(--line)}
.bg-header.is-open{background:#fff}
.bg-header__in{height:var(--hh);display:flex;align-items:center;gap:24px}
.bg-nav{display:flex;align-items:center;gap:2px;margin:0 auto}
.bg-nav__item{display:inline-flex;align-items:center;gap:4px;height:36px;padding:0 12px;border:0;background:none;border-radius:980px;font-size:14px;font-weight:500;color:var(--ink-p);cursor:pointer;transition:color .2s,background .2s}
.bg-nav__item:hover,.bg-nav__item[aria-expanded="true"]{color:var(--ink);background:var(--bg-2)}
.bg-nav__item .bg-ico{width:14px;height:14px;transition:transform .3s var(--ease)}
.bg-nav__item[aria-expanded="true"] .bg-ico{transform:rotate(180deg)}
.bg-header__tools{display:flex;align-items:center;gap:4px;margin-left:auto}
.bg-nav+.bg-header__tools{margin-left:0}
.bg-iconbtn{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border:0;background:none;border-radius:50%;cursor:pointer;color:var(--ink);transition:background .2s}
.bg-iconbtn:hover{background:var(--bg-2)}
.bg-burger{display:none;width:40px;height:40px;border:0;background:none;cursor:pointer;position:relative;border-radius:50%}
.bg-burger span{position:absolute;left:11px;right:11px;height:1.6px;background:var(--ink);border-radius:2px}
.bg-burger span:first-child{top:16px}.bg-burger span:last-child{top:23px}

/* Mega */
.bg-mega{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 30px 60px rgba(0,0,0,.06);padding:28px 0;opacity:0;transform:translateY(-8px);transition:opacity .28s var(--ease),transform .28s var(--ease)}
.bg-mega.is-on{opacity:1;transform:none}
.bg-mega[hidden]{display:block;visibility:hidden;pointer-events:none}
.bg-mega.is-on[hidden]{visibility:visible;pointer-events:auto}
.bg-mega__in{display:grid;grid-template-columns:1fr 270px;gap:32px}
.bg-mega__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:4px 16px}
.bg-mega__cat{display:flex;gap:14px;align-items:flex-start;padding:12px;border-radius:14px;transition:background .2s}
.bg-mega__cat:hover{background:var(--bg-2)}
.bg-mega__cat b{display:block;font-size:15px;font-weight:600}
.bg-mega__cat small{display:block;font-size:13px;color:var(--muted);line-height:1.4;margin-top:2px}
.bg-mega__ico{width:40px;height:40px;border-radius:12px;background:var(--bg-2);display:flex;align-items:center;justify-content:center;flex:none}
.bg-mega__side{border-left:1px solid var(--line);padding-left:32px;display:flex;flex-direction:column;gap:4px}
.bg-mega__pop{display:block;padding:10px 0;border-bottom:1px solid var(--line)}
.bg-mega__pop b{display:block;font-size:15px;font-weight:600;transition:color .2s}
.bg-mega__pop small{display:block;font-size:13px;color:var(--muted)}
.bg-mega__pop:hover b{color:var(--blue)}
.bg-mega__all{margin-top:auto;background:var(--bg-2);border-radius:18px;padding:18px;display:flex;flex-direction:column;gap:4px;transition:transform .3s var(--ease)}
.bg-mega__all:hover{transform:translateY(-2px)}
.bg-mega__all b{font-size:17px}
.bg-mega__all small{font-size:13px;color:var(--muted);margin-bottom:6px}
.bg-mega__cols{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.bg-mega__col{display:flex;flex-direction:column;gap:2px}
.bg-mega__col a{padding:7px 0;font-size:15px;color:var(--ink-p);transition:color .2s}
.bg-mega__col a:hover{color:var(--blue)}
.bg-mega__label{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.bg-mega__foot{padding-top:16px;margin-top:20px;border-top:1px solid var(--line)}
.bg-scrim{position:fixed;inset:0;background:rgba(0,0,0,.18);z-index:50;opacity:0;transition:opacity .3s}
.bg-scrim.is-on{opacity:1}

/* Drawer */
.bg-drawer{position:fixed;inset:0;z-index:80;background:#fff;transform:translateY(-100%);transition:transform .45s var(--ease);overflow-y:auto;padding-bottom:40px;visibility:hidden}
.bg-drawer.is-on{transform:none;visibility:visible}
.bg-drawer__head{display:flex;justify-content:space-between;align-items:center;height:var(--hh);padding:0 12px 0 24px;border-bottom:1px solid var(--line)}
.bg-drawer__nav{padding:8px 24px}
.bg-acc{border-bottom:1px solid var(--line)}
.bg-acc summary,.bg-drawer__link{display:flex;justify-content:space-between;align-items:center;padding:18px 0;font-size:22px;font-weight:600;letter-spacing:-.02em;cursor:pointer;list-style:none}
.bg-acc summary::-webkit-details-marker{display:none}
.bg-acc summary .bg-ico{transition:transform .3s var(--ease);color:var(--muted)}
.bg-acc[open] summary .bg-ico{transform:rotate(180deg)}
.bg-acc__body{display:flex;flex-direction:column;padding:0 0 16px}
.bg-acc__body a{padding:9px 0;font-size:17px;color:var(--ink-p)}
.bg-acc__body--chips{flex-direction:row;flex-wrap:wrap;gap:8px}
.bg-acc__body--chips a{padding:8px 14px}
.bg-drawer__link{border-bottom:1px solid var(--line)}

/* Search overlay */
.bg-search{position:fixed;left:0;right:0;top:0;z-index:90;background:#fff;box-shadow:0 30px 60px rgba(0,0,0,.08);transform:translateY(-100%);transition:transform .4s var(--ease);visibility:hidden}
.bg-search.is-on{transform:none;visibility:visible}
.bg-search__form{display:flex;align-items:center;gap:12px;height:76px;border-bottom:1px solid var(--line)}
.bg-search__form>.bg-ico{color:var(--muted)}
.bg-search__form input{flex:1;border:0;outline:0;font-size:20px;background:none;min-width:0}
.bg-search__hints{display:flex;flex-wrap:wrap;gap:8px 16px;padding:16px 0 22px;font-size:14px;color:var(--muted)}
.bg-search__hints a{color:var(--blue)}

/* ---------- Buttons, links, chips ---------- */
.bg-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:0 28px;border-radius:980px;font-size:17px;font-weight:600;border:0;cursor:pointer;transition:background .25s,transform .25s var(--ease),box-shadow .25s;white-space:nowrap}
.bg-btn:active{transform:scale(.97)}
.bg-btn--blue{background:var(--blue);color:#fff!important}
.bg-btn--blue:hover{background:var(--blue-h)}
.bg-btn--soft{background:var(--bg-2);color:var(--ink)}
.bg-btn--soft:hover{background:#e8e8ed}
.bg-more{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-weight:600;font-size:16px;white-space:nowrap}
.bg-more .bg-ico{width:18px;height:18px;transition:transform .3s var(--ease)}
.bg-more:hover .bg-ico,a:hover>.bg-more .bg-ico{transform:translateX(4px)}
.bg-chips{display:flex;flex-wrap:wrap;gap:8px}
.bg-chips--center{justify-content:center;max-width:860px;margin:0 auto}
.bg-chip{display:inline-flex;align-items:center;padding:8px 15px;border-radius:980px;background:var(--bg-2);font-size:14px;font-weight:500;transition:background .2s,color .2s}
.bg-chip:hover{background:var(--ink);color:#fff}
.bg-chip--lg{padding:14px 22px;font-size:16px;background:#fff;box-shadow:var(--shadow)}

/* ---------- Sections ---------- */
.bg-section{padding:112px 0}
.bg-section--soft{background:var(--bg-2)}
.bg-section--tight{padding:88px 0}
.bg-eyebrow{font-size:14px;font-weight:600;color:var(--bio);margin-bottom:10px}
.bg-h2{font-size:clamp(30px,4vw,44px);font-weight:700;line-height:1.1}
.bg-lead{font-size:clamp(17px,1.7vw,20px);color:var(--muted);margin-top:14px;max-width:620px;line-height:1.5}
.bg-head{margin-bottom:48px}
.bg-head--row{display:flex;justify-content:space-between;align-items:flex-end;gap:24px}
.bg-head--center{text-align:center}
.bg-head--center .bg-lead{margin-left:auto;margin-right:auto}

/* ---------- Hero ---------- */
.bg-hero{position:relative;overflow:hidden;padding:104px 0 64px;text-align:center}
.bg-hero__bg{position:absolute;inset:0;pointer-events:none;z-index:0}
.bg-orb{position:absolute;border-radius:50%;filter:blur(10px)}
.bg-orb--a{width:620px;height:620px;left:-180px;top:-260px;background:radial-gradient(closest-side,rgba(0,113,227,.10),transparent 70%);animation:bgFloatA 16s ease-in-out infinite alternate}
.bg-orb--b{width:560px;height:560px;right:-160px;top:-120px;background:radial-gradient(closest-side,rgba(48,161,78,.10),transparent 70%);animation:bgFloatB 18s ease-in-out infinite alternate}
.bg-hero__grid{position:absolute;inset:0;background-image:radial-gradient(rgba(0,0,0,.07) 1px,transparent 1px);background-size:22px 22px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%)}
.bg-hero__in{position:relative;z-index:1;max-width:900px}
.bg-hero h1{font-size:clamp(36px,5.6vw,60px);font-weight:800;line-height:1.06;letter-spacing:-.035em}
.bg-hero__lead{font-size:clamp(17px,1.9vw,21px);color:var(--ink-p);margin:22px auto 0;max-width:640px;line-height:1.5}
.bg-hsearch{display:flex;align-items:center;gap:10px;max-width:620px;margin:40px auto 0;padding:6px 6px 6px 20px;border-radius:980px;background:#fff;box-shadow:0 10px 40px rgba(0,0,0,.08),0 0 0 1px var(--line);transition:box-shadow .3s}
.bg-hsearch:focus-within{box-shadow:0 14px 50px rgba(0,0,0,.1),0 0 0 2px var(--blue)}
.bg-hsearch>.bg-ico{color:var(--muted)}
.bg-hsearch input{flex:1;min-width:0;border:0;outline:0;background:none;font-size:17px;height:48px}
.bg-hsearch .bg-btn{min-height:48px;padding:0 24px;font-size:16px}
.bg-hero__pop{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-top:20px;font-size:14px;color:var(--muted)}
.bg-hero__pop>span{margin-right:4px}
.bg-hero__pop .bg-chip{background:rgba(255,255,255,.8);box-shadow:0 0 0 1px var(--line)}
.bg-hero__pop .bg-chip:hover{background:var(--ink);box-shadow:none}
.bg-hero__in>*{opacity:0;transform:translateY(18px);animation:bgUp 1s var(--ease) forwards}
.bg-hero__in>*:nth-child(2){animation-delay:.08s}.bg-hero__in>*:nth-child(3){animation-delay:.16s}.bg-hero__in>*:nth-child(4){animation-delay:.24s}
.bg-hero__facts{position:relative;z-index:1;list-style:none;padding:0;margin:64px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;text-align:left;opacity:0;animation:bgUp 1s var(--ease) .35s forwards;transform:translateY(18px)}
.bg-hero__facts li{display:flex;gap:14px;align-items:center;padding:18px 20px;border-radius:20px;background:var(--bg-2);font-size:15px;color:var(--ink-p);line-height:1.35}
.bg-hero__facts b{color:var(--ink)}
@keyframes bgUp{to{opacity:1;transform:none}}
@keyframes bgFloatA{to{transform:translate(80px,60px) scale(1.1)}}
@keyframes bgFloatB{to{transform:translate(-70px,50px) scale(1.08)}}

/* ---------- Categories ---------- */
.bg-cats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.bg-cat{position:relative;display:flex;flex-direction:column;gap:10px;padding:28px 26px 26px;border-radius:var(--r-card);background:var(--bg-2);min-height:220px;transition:transform .4s var(--ease),box-shadow .4s var(--ease),background .3s}
.bg-cat:hover{transform:translateY(-4px);background:#fff;box-shadow:var(--shadow-h)}
.bg-cat__ico{width:48px;height:48px;border-radius:14px;background:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:8px;transition:background .3s,color .3s}
.bg-cat:hover .bg-cat__ico{background:var(--ink);color:#fff}
.bg-cat h3{font-size:20px;font-weight:700}
.bg-cat p{font-size:15px;color:var(--muted);line-height:1.45}
.bg-cat__go{position:absolute;right:22px;top:26px;opacity:0;transform:translateX(-6px);transition:opacity .3s,transform .3s var(--ease);color:var(--blue)}
.bg-cat:hover .bg-cat__go{opacity:1;transform:none}

/* ---------- Problems ---------- */
.bg-probs{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.bg-prob{display:flex;flex-direction:column;gap:8px;padding:26px;border-radius:var(--r-card);background:#fff;box-shadow:var(--shadow);min-height:210px;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.bg-prob:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.bg-prob__group{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.bg-prob h3{font-size:20px;font-weight:700;line-height:1.2}
.bg-prob p{font-size:15px;color:var(--muted);line-height:1.45}
.bg-prob .bg-more{margin-top:auto;padding-top:10px;font-size:15px}

/* ---------- Popular products (rows) ---------- */
.bg-plist{border-top:1px solid var(--line-2)}
.bg-prow{display:grid;grid-template-columns:56px 1fr auto auto 32px;align-items:center;gap:20px;padding:22px 8px;border-bottom:1px solid var(--line-2);transition:background .3s,padding .3s var(--ease)}
.bg-prow:hover{background:var(--bg-2);padding-left:16px;padding-right:16px;border-radius:18px}
.bg-prow__ico{width:56px;height:56px;border-radius:16px;background:var(--bg-2);display:flex;align-items:center;justify-content:center}
.bg-prow:hover .bg-prow__ico{background:#fff}
.bg-prow__main b{display:block;font-size:19px;font-weight:700;letter-spacing:-.01em}
.bg-prow__main small{display:block;font-size:14px;color:var(--muted);margin-top:2px}
.bg-prow__meta{font-size:14px;color:var(--ink-p)}
.bg-prow__price{font-size:16px;font-weight:600;min-width:130px;text-align:right}
.bg-prow__go{color:var(--blue);display:flex;justify-content:flex-end;transition:transform .3s var(--ease)}
.bg-prow:hover .bg-prow__go{transform:translateX(4px)}

/* ---------- Principles ---------- */
.bg-princ{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.bg-princ__item .bg-ico{width:30px;height:30px;margin-bottom:18px}
.bg-princ__item h3{font-size:20px;font-weight:700;margin-bottom:8px}
.bg-princ__item p{font-size:15px;color:var(--muted);line-height:1.5}

/* ---------- Posts ---------- */
.bg-posts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.bg-post{background:#fff;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow);transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.bg-post:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.bg-post img{aspect-ratio:16/10;object-fit:cover;width:100%}
.bg-post h3{font-size:19px;font-weight:700;padding:20px 22px 6px;line-height:1.3}
.bg-post p{font-size:15px;color:var(--muted);padding:0 22px 22px}

/* ---------- SEO text ---------- */
.bg-seo .bg-h2{max-width:640px}
.bg-seo__cols{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:28px}
.bg-seo__cols p{color:var(--ink-p);font-size:17px;line-height:1.65}

/* ---------- FAQ ---------- */
.bg-faq{display:grid;grid-template-columns:1fr 1.6fr;gap:56px;align-items:start}
.bg-faq__list{background:#fff;border-radius:var(--r-card);padding:8px 28px;box-shadow:var(--shadow)}
.bg-faq__item{border-bottom:1px solid var(--line)}
.bg-faq__item:last-child{border-bottom:0}
.bg-faq__item summary{position:relative;list-style:none;cursor:pointer;padding:22px 44px 22px 0;font-size:17px;font-weight:600;line-height:1.4}
.bg-faq__item summary::-webkit-details-marker{display:none}
.bg-faq__plus{position:absolute;right:4px;top:50%;width:14px;height:14px;margin-top:-7px}
.bg-faq__plus::before,.bg-faq__plus::after{content:"";position:absolute;left:0;right:0;top:6px;height:2px;border-radius:2px;background:var(--ink);transition:transform .35s var(--ease)}
.bg-faq__plus::after{transform:rotate(90deg)}
.bg-faq__item[open] .bg-faq__plus::after{transform:rotate(0)}
.bg-faq__a{padding:0 0 22px;color:var(--ink-p);font-size:16px;line-height:1.6;animation:bgFade .4s var(--ease)}
@keyframes bgFade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- Footer ---------- */
.bg-footer{background:var(--bg-2);padding:72px 0 32px;font-size:14px;color:var(--muted)}
.bg-footer__top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;border-bottom:1px solid var(--line-2)}
.bg-footer__brand p{margin-top:16px;max-width:320px;line-height:1.6}
.bg-footer__col{display:flex;flex-direction:column;gap:10px}
.bg-footer__h{color:var(--ink);font-weight:600;font-size:14px;margin-bottom:4px}
.bg-footer__col a{transition:color .2s}
.bg-footer__col a:hover{color:var(--ink)}
.bg-footer__bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:24px;font-size:13px}

/* ---------- Reveal on scroll ---------- */
.js .rv{opacity:0;transform:translateY(24px);transition:opacity .9s var(--ease),transform .9s var(--ease);transition-delay:var(--d,0ms)}
.js .rv.is-in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .bg-nav{display:none}
  .bg-burger{display:block}
  .bg-mega{display:none!important}
  .bg-cats,.bg-probs{grid-template-columns:repeat(2,1fr)}
  .bg-princ{grid-template-columns:repeat(2,1fr)}
  .bg-footer__top{grid-template-columns:1fr 1fr}
  .bg-footer__brand{grid-column:1/-1}
}
@media (max-width:900px){
  .bg-hero{padding:64px 0 48px}
  .bg-hero__facts{grid-template-columns:1fr;margin-top:40px}
  .bg-faq{grid-template-columns:1fr;gap:28px}
  .bg-seo__cols{grid-template-columns:1fr;gap:16px}
  .bg-posts{grid-template-columns:1fr}
  .bg-section{padding:64px 0}
  .bg-section--tight{padding:56px 0}
  .bg-head{margin-bottom:32px}
  .bg-head--row{flex-direction:column;align-items:flex-start}
  .bg-prow{grid-template-columns:48px 1fr auto;gap:14px}
  .bg-prow__ico{width:48px;height:48px}
  .bg-prow__meta,.bg-prow__go{display:none}
  .bg-prow__price{min-width:0;font-size:15px}
}
@media (max-width:600px){
  .bg-wrap{padding:0 16px}
  .bg-hero{padding:48px 0 40px}
  .bg-hero h1{font-size:34px}
  .bg-hsearch{padding:5px 5px 5px 16px;margin-top:28px}
  .bg-hsearch .bg-btn{padding:0 18px}
  .bg-hsearch input{font-size:16px;height:44px}
  .bg-hero__pop>span{width:100%;margin:0 0 2px}
  .bg-cats{grid-template-columns:1fr 1fr;gap:10px}
  .bg-cat{min-height:0;padding:20px 18px;border-radius:22px}
  .bg-cat h3{font-size:17px}
  .bg-cat p{font-size:13px}
  .bg-cat__ico{width:42px;height:42px}
  .bg-probs{grid-template-columns:1fr;gap:10px}
  .bg-prob{min-height:0;padding:22px}
  .bg-princ{grid-template-columns:1fr;gap:28px}
  .bg-faq__list{padding:4px 20px}
  .bg-footer__top{grid-template-columns:1fr;gap:28px}
  .bg-chip--lg{padding:12px 18px;font-size:15px}
  .bg-prow__price{display:none}
}
@media (prefers-reduced-motion:reduce){
  .bg *,.bg *::before,.bg *::after{animation:none!important;transition:none!important}
  .bg-hero__in>*,.bg-hero__facts,.js .rv{opacity:1!important;transform:none!important}
}