/* ============================================================
   LiBat — landing
   ============================================================ */

:root{
  --bg:#ffffff;
  --bg-alt:#f5f5f7;
  --ink:#1d1d1f;
  --ink-2:#6e6e73;
  --ink-3:#86868b;
  --line:rgba(0,0,0,.09);
  --accent:#0071e3;
  --accent-hi:#0a84ff;
  --dark:#101013;
  --radius:20px;
  --radius-sm:12px;
  --shadow-s:0 1px 2px rgba(0,0,0,.04), 0 6px 20px rgba(0,0,0,.05);
  --shadow-m:0 2px 6px rgba(0,0,0,.05), 0 18px 50px rgba(0,0,0,.09);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:56px;
  --maxw:1240px;
  --pad:clamp(20px,5vw,64px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"SF Pro Display","SF Pro Text",-apple-system,BlinkMacSystemFont,"Segoe UI Variable Display","Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.5;
  letter-spacing:-.011em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:650;letter-spacing:-.028em;line-height:1.06}
p{margin:0}
ul,dl,dd{margin:0;padding:0}
li{list-style:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::selection{background:rgba(0,113,227,.18)}

section[id]{scroll-margin-top:calc(var(--nav-h) + 8px)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.wrap--narrow{max-width:820px}
.center{text-align:center;margin-top:clamp(36px,5vw,64px)}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:100;height:var(--nav-h);
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.nav.is-scrolled{border-bottom-color:var(--line)}
.nav__inner{
  max-width:var(--maxw);height:100%;margin:0 auto;padding:0 var(--pad);
  display:flex;align-items:center;gap:clamp(18px,3vw,40px);
}
.logo{font-size:21px;letter-spacing:-.03em;font-weight:400;flex:none}
.logo b{font-weight:700}
.nav__links{display:flex;gap:clamp(16px,2.4vw,34px);margin-left:auto}
.nav__links a{
  font-size:14px;color:var(--ink);opacity:.82;position:relative;padding:4px 0;
  transition:opacity .25s var(--ease);
}
.nav__links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .35s var(--ease);
}
.nav__links a:hover{opacity:1}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__cta{margin-left:8px}

.burger{
  display:none;width:44px;height:44px;margin-left:auto;margin-right:-10px;
  background:none;border:0;padding:0;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;
}
.burger span{display:block;width:21px;height:1.5px;background:var(--ink);border-radius:2px;transition:transform .35s var(--ease),opacity .25s}
.burger span+span{margin-top:6px}
.burger[aria-expanded="true"] span:first-child{transform:translateY(3.75px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-3.75px) rotate(-45deg)}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 30px;border:1px solid transparent;border-radius:980px;
  font-size:16px;font-weight:500;letter-spacing:-.01em;cursor:pointer;
  transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
  will-change:transform;
}
.btn:active{transform:scale(.975)}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(0,113,227,.22)}
.btn--primary:hover{background:var(--accent-hi);box-shadow:0 10px 30px rgba(10,132,255,.3);transform:translateY(-1px)}
.btn--ghost{border-color:rgba(0,0,0,.18);color:var(--ink)}
.btn--ghost:hover{border-color:var(--ink);background:rgba(0,0,0,.03);transform:translateY(-1px)}
.btn--light{background:#fff;color:var(--dark)}
.btn--light:hover{background:#f0f0f2;transform:translateY(-1px)}
.btn--small{padding:8px 17px;font-size:14px}
.btn--wide{width:100%;margin-top:8px}
.btn:disabled{
  background:#d2d2d7;color:#fff;box-shadow:none;cursor:not-allowed;
  transform:none;pointer-events:auto;
}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;padding-top:calc(var(--nav-h) + clamp(40px,7vw,92px));padding-bottom:clamp(60px,9vw,120px);overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-15%;left:50%;width:140vw;height:120%;
  transform:translateX(-50%);pointer-events:none;
  background:radial-gradient(45% 50% at 68% 40%,rgba(0,113,227,.10),transparent 70%),
             radial-gradient(40% 45% at 20% 15%,rgba(0,0,0,.045),transparent 70%);
}
.hero__grid{
  position:relative;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,64px);align-items:center;
}
.eyebrow{
  font-size:13px;font-weight:590;letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent);margin-bottom:18px;
}
.eyebrow--light{color:rgba(255,255,255,.6)}
.hero h1{font-size:clamp(2.45rem,5.6vw,4.7rem);font-weight:680;letter-spacing:-.035em}
.lead{
  margin-top:clamp(18px,2.4vw,26px);max-width:31ch;
  font-size:clamp(1.06rem,1.5vw,1.4rem);line-height:1.42;color:var(--ink-2);font-weight:400;
}
.lead--sm{font-size:1.06rem;max-width:38ch}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(28px,3.4vw,42px)}
.hero__facts{display:flex;flex-wrap:wrap;gap:8px 26px;margin-top:clamp(32px,4vw,52px)}
.hero__facts li{
  font-size:13.5px;color:var(--ink-3);position:relative;padding-left:15px;
}
.hero__facts li::before{
  content:"";position:absolute;left:0;top:.62em;width:5px;height:5px;border-radius:50%;
  background:var(--accent);opacity:.65;
}

.hero__media{position:relative;justify-self:center}
.hero__glow{
  position:absolute;inset:6% 4% 2% 4%;border-radius:50%;
  background:radial-gradient(closest-side,rgba(0,113,227,.20),rgba(0,113,227,0) 72%);
  filter:blur(18px);
}
.hero__media img{
  position:relative;max-height:min(76vh,780px);width:auto;margin:0 auto;
  /* фото сняты на белом — multiply убирает белый прямоугольник поверх подсветки */
  mix-blend-mode:multiply;
  animation:float 9s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@media (prefers-reduced-motion:reduce){.hero__media img{animation:none}}

.scroll-hint{
  position:absolute;left:50%;bottom:26px;width:22px;height:34px;margin-left:-11px;
  border:1.5px solid rgba(0,0,0,.18);border-radius:12px;
}
.scroll-hint::after{
  content:"";position:absolute;left:50%;top:7px;width:2px;height:6px;margin-left:-1px;
  border-radius:2px;background:var(--ink-3);animation:wheel 1.9s var(--ease) infinite;
}
@keyframes wheel{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(11px)}}
@media (max-width:900px){.scroll-hint{display:none}}

/* ============================================================
   SECTIONS
   ============================================================ */
.section{padding:clamp(72px,11vw,150px) 0}
.section--alt{background:var(--bg-alt)}
.section__title{
  font-size:clamp(1.95rem,3.9vw,3.3rem);font-weight:660;text-align:center;
  letter-spacing:-.032em;
}
.section__title--left{text-align:left}
.section__sub{
  margin:18px auto 0;max-width:46ch;text-align:center;
  font-size:clamp(1rem,1.2vw,1.18rem);color:var(--ink-2);
}

.cards{display:grid;gap:clamp(18px,2vw,26px);margin-top:clamp(44px,6vw,76px)}
.cards--4{grid-template-columns:repeat(4,1fr)}
.cards--3{grid-template-columns:repeat(3,1fr)}

/* ---------- advantage card ---------- */
.card{
  padding:clamp(26px,2.6vw,36px);border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-m)}
.ico{width:30px;height:30px;fill:none;stroke:var(--accent);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;margin-bottom:22px}
.card h3{font-size:1.16rem;font-weight:620}
.card p{margin-top:11px;font-size:15px;line-height:1.52;color:var(--ink-2)}

/* ---------- tabs ---------- */
.tabs{
  display:flex;justify-content:center;gap:6px;margin:clamp(32px,4vw,48px) auto 0;
  padding:5px;border-radius:980px;background:rgba(0,0,0,.05);width:max-content;max-width:100%;
}
.tab{
  border:0;background:transparent;border-radius:980px;padding:9px 26px;
  font-size:15px;font-weight:520;color:var(--ink-2);cursor:pointer;
  transition:background .35s var(--ease),color .35s var(--ease),box-shadow .35s var(--ease);
}
.tab:hover{color:var(--ink)}
.tab.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.1)}

.panel{display:none}
.panel.is-active{display:block;animation:fade .55s var(--ease)}
@keyframes fade{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.panel .cards{margin-top:clamp(30px,3.4vw,46px)}

/* ---------- product card ---------- */
.prod{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(20px,2vw,26px);overflow:hidden;
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}
.prod:hover{transform:translateY(-5px);box-shadow:var(--shadow-m)}
.prod__img{
  aspect-ratio:4/3;border-radius:var(--radius-sm);margin-bottom:22px;overflow:hidden;
  background:radial-gradient(70% 70% at 50% 40%,#f7f7f9,#ececef);
  display:flex;align-items:center;justify-content:center;
}
.prod__img img{
  width:100%;height:100%;object-fit:contain;padding:8%;
  mix-blend-mode:multiply;
  transition:transform .7s var(--ease);
}
.prod:hover .prod__img img{transform:scale(1.045)}
.prod h3{font-size:1.22rem;font-weight:620}
.prod__spec{margin-top:8px;font-size:14px;color:var(--accent);font-weight:520;font-variant-numeric:tabular-nums}
.prod__note{margin-top:12px;font-size:14.5px;line-height:1.5;color:var(--ink-2)}

/* ============================================================
   WHOLESALE
   ============================================================ */
.wholesale{
  background:
    radial-gradient(60% 70% at 78% 30%,rgba(0,113,227,.28),transparent 65%),
    linear-gradient(180deg,#15151a,#0c0c0f);
  color:#fff;
}
.wholesale__grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,80px);align-items:center}
.wholesale h2{font-size:clamp(1.9rem,3.6vw,3rem);font-weight:660}
.checklist{margin:clamp(26px,3vw,38px) 0 clamp(32px,3.6vw,44px);display:grid;gap:16px}
.checklist li{
  position:relative;padding-left:32px;font-size:16px;line-height:1.5;color:rgba(255,255,255,.72);
}
.checklist li::before{
  content:"";position:absolute;left:0;top:2px;width:19px;height:19px;border-radius:50%;
  background:rgba(255,255,255,.1);
}
.checklist li::after{
  content:"";position:absolute;left:6px;top:8px;width:7px;height:4px;
  border-left:1.6px solid var(--accent-hi);border-bottom:1.6px solid var(--accent-hi);
  transform:rotate(-45deg);
}
.wholesale__media img{
  border-radius:var(--radius);width:100%;
  aspect-ratio:4/5;object-fit:cover;
  box-shadow:0 40px 80px rgba(0,0,0,.5);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq{border-bottom:1px solid var(--line);padding:6px 0}
.faq:first-of-type{border-top:1px solid var(--line);margin-top:clamp(40px,5vw,64px)}
.faq summary{
  list-style:none;cursor:pointer;padding:24px 44px 24px 0;position:relative;
  font-size:clamp(1.02rem,1.4vw,1.2rem);font-weight:560;letter-spacing:-.018em;
  transition:color .3s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--accent)}
.faq summary::after,.faq summary::before{
  content:"";position:absolute;right:8px;top:50%;background:var(--ink-2);border-radius:2px;
  transition:transform .4s var(--ease),background .3s var(--ease);
}
.faq summary::before{width:15px;height:1.6px;margin-top:-.8px}
.faq summary::after{width:1.6px;height:15px;margin:-7.5px -8px 0 0;right:15px}
.faq[open] summary::after{transform:rotate(90deg)}
.faq[open] summary{color:var(--ink)}
.faq__body{padding:0 clamp(0px,4vw,60px) 26px 0}
.faq__body p{color:var(--ink-2);font-size:16px;line-height:1.58}
.faq__body p+p{margin-top:14px}
.faq__lead{margin-top:18px!important;color:var(--ink)!important;font-weight:520}
.faq__body ul{margin:10px 0 4px;display:grid;gap:7px}
.faq__body li{
  position:relative;padding-left:20px;color:var(--ink-2);font-size:16px;line-height:1.5;
}
.faq__body li::before{
  content:"";position:absolute;left:2px;top:.66em;width:5px;height:5px;border-radius:50%;
  background:var(--accent);opacity:.55;
}

/* ============================================================
   CONTACTS
   ============================================================ */
.contacts__grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vw,88px);align-items:start}
.contacts__list{margin-top:clamp(32px,4vw,48px);display:grid;gap:22px}
.contacts__list div{display:grid;gap:3px}
.contacts__list dt{font-size:13px;color:var(--ink-3);letter-spacing:.02em}
.contacts__list dd{font-size:1.06rem;font-weight:520}
/* padding + отрицательный margin расширяют зону нажатия до 44px,
   не меняя вид блока */
.contacts__list a{
  display:inline-block;padding:11px 4px;margin:-11px -4px;
  transition:color .25s var(--ease);
}
.contacts__list a:hover{color:var(--accent)}

.form{
  background:var(--bg-alt);border-radius:var(--radius);
  padding:clamp(24px,3vw,40px);display:grid;gap:14px;
}
.field{position:relative}
.field input,.field textarea,.field select{
  width:100%;padding:26px 16px 11px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;color:var(--ink);font:inherit;font-size:16px;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
  -webkit-appearance:none;appearance:none;
}
.field textarea{resize:vertical;min-height:96px;line-height:1.45}
.field label{
  position:absolute;left:17px;top:17px;font-size:16px;color:var(--ink-3);
  pointer-events:none;transform-origin:left top;
  transition:transform .25s var(--ease),color .25s var(--ease);
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(0,113,227,.13);
}
.field input:focus+label,.field textarea:focus+label,
.field input:not(:placeholder-shown)+label,.field textarea:not(:placeholder-shown)+label{
  transform:translateY(-11px) scale(.76);color:var(--ink-3);
}
.field--select label{transform:translateY(-11px) scale(.76)}
.field--select::after{
  content:"";position:absolute;right:18px;bottom:20px;width:8px;height:8px;
  border-right:1.6px solid var(--ink-3);border-bottom:1.6px solid var(--ink-3);
  transform:rotate(45deg);pointer-events:none;
}
.field.has-error input,.field.has-error textarea{border-color:#d7263d;box-shadow:0 0 0 4px rgba(215,38,61,.1)}

.consent{display:flex;gap:11px;align-items:flex-start;margin:6px 0 2px;cursor:pointer}
.consent input{margin:1px 0 0;width:20px;height:20px;flex:none;accent-color:var(--accent)}
.consent span{font-size:13px;line-height:1.45;color:var(--ink-2)}
.consent a{text-decoration:underline;text-underline-offset:2px}
.consent.has-error span{color:#d7263d}

.form__msg{min-height:20px;font-size:14.5px;color:var(--ink-2);text-align:center}
.form__msg.is-ok{color:#1a7f37}
.form__msg.is-err{color:#d7263d}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:clamp(44px,5vw,64px) 0}
.footer__inner{display:grid;gap:22px}
.logo--footer{font-size:19px}
.footer__links{display:flex;flex-wrap:wrap;gap:0 28px;margin:-11px 0}
.footer__links a{
  font-size:13.5px;color:var(--ink-2);
  display:inline-block;padding:11px 0;
  transition:color .25s var(--ease);
}
.footer__links a:hover{color:var(--ink)}
.footer__legal{font-size:12.5px;line-height:1.6;color:var(--ink-3);max-width:78ch}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .cards--4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .hero__grid{grid-template-columns:1fr;text-align:center;gap:44px}
  .lead,.hero__facts{margin-left:auto;margin-right:auto}
  .hero__actions,.hero__facts{justify-content:center}
  /* на телефоне ограничиваем по ширине, а не по высоте — иначе узкий
     вертикальный аккумулятор получается слишком мелким */
  .hero__media img{max-height:none;width:min(58vw,300px)}
  .cards--3{grid-template-columns:1fr}
  .wholesale__grid,.contacts__grid{grid-template-columns:1fr}
  .wholesale__media{order:-1}
  .section__title--left{text-align:center}
  .contacts__info{text-align:center}
  .contacts__info .lead{margin-left:auto;margin-right:auto}
  .contacts__list{justify-items:center}
}
@media (max-width:760px){
  .nav__links{
    position:fixed;inset:var(--nav-h) 0 auto 0;flex-direction:column;gap:0;margin:0;
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);
    padding:8px var(--pad) 20px;
    transform:translateY(-8px);opacity:0;visibility:hidden;
    transition:transform .35s var(--ease),opacity .3s var(--ease),visibility .3s;
  }
  .nav__links.is-open{transform:none;opacity:1;visibility:visible}
  .nav__links a{padding:15px 0;font-size:17px;border-bottom:1px solid var(--line)}
  .nav__links a::after{display:none}
  .nav__cta{display:none}
  .burger{display:flex}
  .cards--4{grid-template-columns:1fr}
  .hero__facts{gap:6px 18px}
  .tabs{width:100%;justify-content:stretch}
  .tab{flex:1;padding:10px 8px}
}