/* ============ IDE. — tech courses & consultations ============ */
:root{
  --black:#0a0a0a;
  --white:#ffffff;
  --gray-1:#f4f4f4;
  --gray-2:#e6e6e6;
  --gray-3:#b5b5b5;
  --gray-4:#6b6b6b;
  --line:#e2e2e2;
  --accent:#0a0a0a;
  --maxw:1400px;
  --pad:clamp(20px,5vw,64px);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--black);
  background:var(--white);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.label{font-size:11px;letter-spacing:.22em;text-transform:uppercase;font-weight:500}
.mono{font-variant-numeric:tabular-nums}

/* ---- announcement ---- */
.announce{background:var(--black);color:#fff;text-align:center;font-size:12px;letter-spacing:.04em;padding:9px 16px}
.announce a{text-decoration:underline;text-underline-offset:3px}

/* ---- header ---- */
.header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:24px}
.logo{font-weight:800;font-size:24px;letter-spacing:-.02em}
.logo span{color:var(--gray-3)}
.nav{display:flex;gap:30px}
.nav a{font-size:13px;letter-spacing:.14em;text-transform:uppercase;font-weight:500;position:relative;padding:4px 0}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--black);transition:width .3s}
.nav a:hover::after,.nav a.active::after{width:100%}
.header__actions{display:flex;align-items:center;gap:20px}
.iconbtn{font-size:17px;display:flex;align-items:center;position:relative}
.cart-count{position:absolute;top:-8px;right:-10px;background:var(--black);color:#fff;font-size:10px;font-weight:600;min-width:16px;height:16px;border-radius:9px;display:flex;align-items:center;justify-content:center;padding:0 4px}
.cart-count.empty{display:none}
.burger{display:none;font-size:20px}

/* header search bar */
.hsearch{position:fixed;top:0;left:0;right:0;background:#fff;z-index:80;border-bottom:1px solid var(--line);transform:translateY(-100%);transition:transform .35s cubic-bezier(.4,0,.2,1)}
.hsearch.open{transform:translateY(0)}
.hsearch form{display:flex;align-items:center;gap:16px;height:90px;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.hsearch input{flex:1;border:none;font-size:clamp(20px,4vw,34px);font-weight:600;letter-spacing:-.01em;outline:none;background:transparent}
.hsearch .close{font-size:22px}

/* ---- hero ---- */
.hero{position:relative;min-height:78vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.hero__bg{position:absolute;inset:0;object-fit:cover;width:100%;height:100%;z-index:-1}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.15) 0%,rgba(0,0,0,.55) 100%);z-index:-1}
.hero__inner{padding-bottom:clamp(40px,7vw,90px);padding-top:120px;width:100%}
.hero h1{font-size:clamp(38px,7vw,86px);line-height:.98;font-weight:800;letter-spacing:-.03em;max-width:14ch}
.hero p{margin-top:20px;font-size:clamp(15px,1.6vw,19px);max-width:44ch;color:rgba(255,255,255,.85)}
.hero .btnrow{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.1em;text-transform:uppercase;font-weight:600;padding:15px 30px;border:1px solid var(--black);background:var(--black);color:#fff;transition:.25s}
.btn:hover{background:#fff;color:var(--black)}
.btn--ghost{background:transparent;border-color:#fff;color:#fff}
.btn--ghost:hover{background:#fff;color:var(--black)}
.btn--light{background:#fff;color:var(--black);border-color:#fff}
.btn--light:hover{background:transparent;color:#fff}
.btn--block{width:100%;justify-content:center}
.btn--outline{background:transparent;color:var(--black)}
.btn--outline:hover{background:var(--black);color:#fff}
.link-underline{font-size:13px;letter-spacing:.1em;text-transform:uppercase;font-weight:600;border-bottom:1px solid;padding-bottom:3px;display:inline-block}

/* ---- section ---- */
.section{padding:clamp(56px,8vw,110px) 0}
.section--tight{padding:clamp(40px,5vw,70px) 0}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:40px;gap:20px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(26px,4vw,44px);font-weight:800;letter-spacing:-.02em;line-height:1.02}
.sec-head p{color:var(--gray-4);max-width:40ch;margin-top:8px}

/* ---- product grid ---- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:2px;background:var(--line)}
.grid.gap{gap:28px;background:transparent}
.card{background:#fff;padding:22px;display:flex;flex-direction:column;transition:.3s}
.card:hover{background:var(--gray-1)}
.card__media{position:relative;aspect-ratio:1;background:var(--gray-1);overflow:hidden;margin-bottom:18px}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.card:hover .card__media img{transform:scale(1.05)}
.card__cat{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--gray-4)}
.card__title{font-size:17px;font-weight:700;margin:8px 0;letter-spacing:-.01em;line-height:1.2}
.card__meta{font-size:13px;color:var(--gray-4);margin-bottom:14px}
.card__foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px}
.card__price{font-size:17px;font-weight:700}
.card .addbtn{font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;padding:10px 16px;border:1px solid var(--black);transition:.2s}
.card .addbtn:hover{background:var(--black);color:#fff}
.badge{position:absolute;top:12px;left:12px;background:#fff;color:#000;font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:5px 10px}

/* ---- categories strip ---- */
.cats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:2px;background:var(--line)}
.cat{background:#000;color:#fff;aspect-ratio:1;display:flex;flex-direction:column;justify-content:space-between;padding:22px;transition:.3s;position:relative;overflow:hidden}
.cat:nth-child(even){background:#111}
.cat:hover{background:#fff;color:#000}
.cat i{font-size:26px}
.cat span{font-size:16px;font-weight:700;letter-spacing:-.01em}
.cat small{font-size:11px;letter-spacing:.14em;text-transform:uppercase;opacity:.6}

/* ---- feature banner ---- */
.banner{display:grid;grid-template-columns:1fr 1fr;align-items:stretch;background:#000;color:#fff}
.banner__img{min-height:420px}
.banner__img img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05)}
.banner__body{padding:clamp(32px,5vw,72px);display:flex;flex-direction:column;justify-content:center}
.banner__body h2{font-size:clamp(26px,3.4vw,42px);font-weight:800;letter-spacing:-.02em;line-height:1.05;margin-bottom:16px}
.banner__body p{color:rgba(255,255,255,.8);margin-bottom:28px;max-width:46ch}

/* ---- steps / why ---- */
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:2px;background:var(--line)}
.feat{background:#fff;padding:32px 26px}
.feat i{font-size:24px;margin-bottom:16px;display:block}
.feat h3{font-size:16px;font-weight:700;margin-bottom:8px}
.feat p{font-size:14px;color:var(--gray-4)}
.feat .num{font-size:12px;color:var(--gray-3);font-weight:700;letter-spacing:.1em}

/* ---- testimonials ---- */
.quotes{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2px;background:var(--line)}
.quote{background:#fff;padding:34px 28px;display:flex;flex-direction:column}
.quote p{font-size:16px;line-height:1.55;margin-bottom:20px}
.quote .who{margin-top:auto;font-size:13px}
.quote .who b{display:block;font-weight:700}
.quote .who span{color:var(--gray-4)}
.stars{color:#000;font-size:12px;letter-spacing:2px;margin-bottom:14px}

/* ---- toolbar (catalog) ---- */
.toolbar{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.filters{display:flex;gap:10px;flex-wrap:wrap}
.chip{font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;padding:9px 16px;border:1px solid var(--line);transition:.2s}
.chip:hover{border-color:var(--black)}
.chip.active{background:var(--black);color:#fff;border-color:var(--black)}
.searchbox{display:flex;align-items:center;gap:10px;border:1px solid var(--line);padding:9px 14px;min-width:230px}
.searchbox input{border:none;outline:none;font-size:14px;width:100%;font-family:inherit}
.result-info{font-size:13px;color:var(--gray-4);margin-bottom:20px}
.empty-state{text-align:center;padding:80px 20px;color:var(--gray-4)}
.empty-state i{font-size:36px;margin-bottom:16px;display:block}

/* ---- product detail ---- */
.pdp{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(30px,5vw,70px);align-items:start}
.pdp__media{position:sticky;top:90px}
.pdp__media img{width:100%;aspect-ratio:1;object-fit:cover;background:var(--gray-1)}
.pdp__cat{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--gray-4);margin-bottom:14px}
.pdp h1{font-size:clamp(28px,4vw,46px);font-weight:800;letter-spacing:-.02em;line-height:1.02;margin-bottom:16px}
.pdp__price{font-size:26px;font-weight:700;margin:20px 0}
.pdp__desc{color:var(--gray-4);line-height:1.65;margin-bottom:28px}
.pdp__meta{border-top:1px solid var(--line);margin-top:30px}
.pdp__meta .row{display:flex;justify-content:space-between;padding:15px 0;border-bottom:1px solid var(--line);font-size:14px}
.pdp__meta .row span:first-child{color:var(--gray-4)}
.qtyrow{display:flex;gap:14px;align-items:stretch;margin-bottom:16px}
.qtybox{display:flex;align-items:center;border:1px solid var(--black)}
.qtybox button{width:46px;font-size:18px}
.qtybox span{min-width:44px;text-align:center;font-weight:600}
.curric{margin-top:14px}
.curric summary{cursor:pointer;padding:16px 0;border-bottom:1px solid var(--line);font-weight:600;list-style:none;display:flex;justify-content:space-between}
.curric summary::-webkit-details-marker{display:none}
.curric summary::after{content:"+";font-size:20px}
.curric details[open] summary::after{content:"–"}
.curric p{padding:14px 0;color:var(--gray-4);font-size:14px}

/* ---- cart ---- */
.cart-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:clamp(30px,5vw,60px);align-items:start}
.citem{display:grid;grid-template-columns:110px 1fr auto;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);align-items:center}
.citem img{width:110px;height:110px;object-fit:cover;background:var(--gray-1)}
.citem__t{font-size:16px;font-weight:700;margin-bottom:4px}
.citem__c{font-size:12px;color:var(--gray-4);letter-spacing:.1em;text-transform:uppercase}
.citem__right{text-align:right;display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.citem .qtybox button{width:36px;height:36px}
.citem .remove{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--gray-4);border-bottom:1px solid var(--gray-2)}
.citem .remove:hover{color:#000;border-color:#000}
.summary{background:var(--gray-1);padding:32px;position:sticky;top:90px}
.summary h3{font-size:13px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:22px}
.summary .row{display:flex;justify-content:space-between;padding:11px 0;font-size:15px}
.summary .row.total{border-top:1px solid var(--line);margin-top:12px;padding-top:18px;font-size:20px;font-weight:800}
.summary .btn{margin-top:22px}
.summary .note{font-size:12px;color:var(--gray-4);margin-top:14px;text-align:center}

/* ---- newsletter ---- */
.news{background:#000;color:#fff;text-align:center;padding:clamp(56px,8vw,100px) 0}
.news h2{font-size:clamp(26px,4vw,46px);font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.news p{color:rgba(255,255,255,.7);max-width:42ch;margin:0 auto 30px}
.news form{display:flex;max-width:460px;margin:0 auto;border:1px solid rgba(255,255,255,.4)}
.news input{flex:1;background:transparent;border:none;outline:none;color:#fff;padding:16px 20px;font-size:15px;font-family:inherit}
.news input::placeholder{color:rgba(255,255,255,.5)}
.news button{background:#fff;color:#000;padding:0 26px;font-size:12px;letter-spacing:.1em;text-transform:uppercase;font-weight:700}

/* ---- footer ---- */
.footer{background:#000;color:#fff;padding:70px 0 40px}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer .logo{font-size:30px;margin-bottom:16px}
.footer p{color:rgba(255,255,255,.6);font-size:14px;max-width:34ch}
.footer h4{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:18px}
.footer ul li{margin-bottom:11px}
.footer ul a{font-size:14px;color:rgba(255,255,255,.85)}
.footer ul a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.15);font-size:12px;color:rgba(255,255,255,.5);flex-wrap:wrap;gap:12px}
.socials{display:flex;gap:18px;font-size:16px}

/* ---- page hero (inner) ---- */
.phead{padding:clamp(50px,7vw,90px) 0 clamp(30px,4vw,50px);border-bottom:1px solid var(--line)}
.phead .label{color:var(--gray-4);margin-bottom:14px}
.phead h1{font-size:clamp(32px,6vw,68px);font-weight:800;letter-spacing:-.03em;line-height:1}
.phead p{color:var(--gray-4);max-width:52ch;margin-top:16px;font-size:16px}

/* ---- about ---- */
.prose{max-width:70ch}
.prose p{margin-bottom:18px;color:#2a2a2a;line-height:1.7}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:2px;background:var(--line)}
.stat{background:#fff;padding:34px 24px}
.stat b{font-size:clamp(34px,5vw,56px);font-weight:800;letter-spacing:-.03em;display:block}
.stat span{font-size:13px;color:var(--gray-4);letter-spacing:.06em}

/* ---- contacts ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,60px)}
.field{margin-bottom:18px}
.field label{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px;color:var(--gray-4)}
.field input,.field textarea{width:100%;border:1px solid var(--line);padding:14px 16px;font-size:15px;font-family:inherit;outline:none;transition:.2s}
.field input:focus,.field textarea:focus{border-color:var(--black)}
.infoblock{margin-bottom:26px}
.infoblock h4{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--gray-4);margin-bottom:8px}
.infoblock p{font-size:16px}

/* ---- toast ---- */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(120%);background:#000;color:#fff;padding:15px 26px;font-size:14px;z-index:200;transition:transform .4s cubic-bezier(.2,.8,.2,1);display:flex;align-items:center;gap:12px}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast i{font-size:16px}

/* ---- responsive ---- */
@media(max-width:1000px){
  .footer__grid{grid-template-columns:1fr 1fr}
  .pdp{grid-template-columns:1fr}
  .pdp__media{position:static}
  .cart-layout{grid-template-columns:1fr}
  .banner{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .summary{position:static}
}
@media(max-width:760px){
  .nav{position:fixed;inset:0 0 0 auto;width:78%;max-width:340px;background:#fff;flex-direction:column;padding:100px 32px 40px;gap:6px;transform:translateX(100%);transition:transform .35s cubic-bezier(.4,0,.2,1);z-index:70;border-left:1px solid var(--line)}
  .nav.open{transform:translateX(0)}
  .nav a{font-size:18px;padding:14px 0;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .burger{display:block}
  .footer__grid{grid-template-columns:1fr}
  .banner__img{min-height:280px}
  .citem{grid-template-columns:80px 1fr;gap:14px}
  .citem img{width:80px;height:80px}
  .citem__right{grid-column:1/-1;flex-direction:row;justify-content:space-between;align-items:center}
}
.navback{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:65;opacity:0;visibility:hidden;transition:.3s}
.navback.open{opacity:1;visibility:visible}