/* TECHCOMIN V2 design system — original, inspired by best-practice material catalog UX.
   No third-party CSS is copied. */
:root{
  --ink:#0f1f18; --ink-2:#33463d; --muted:#61746b; --line:#e3eae6; --line-2:#f1f5f3;
  --bg:#ffffff; --bg-2:#f7faf8; --brand:#14694a; --brand-2:#0d5038; --brand-soft:#eaf4ef;
  --warn:#8a6100; --warn-bg:#fff6e0; --radius:14px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(15,31,24,.05), 0 8px 24px rgba(15,31,24,.06);
  --maxw:1240px; --gap:20px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
img,picture,video{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.22;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(26px,3.6vw,44px)}
h2{font-size:clamp(20px,2.4vw,30px)}
h3{font-size:clamp(17px,1.6vw,20px)}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:#fff;padding:8px 12px;border-radius:8px;z-index:99}

/* ---------- header ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:18px;padding:10px 0}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand img{height:38px;width:auto}
.brand b{font-size:17px;letter-spacing:.02em;color:var(--ink)}
.nav{display:flex;gap:4px;flex-wrap:wrap;flex:1 1 auto}
.nav a{padding:9px 12px;border-radius:9px;color:var(--ink-2);font-weight:550;font-size:15px}
.nav a:hover{background:var(--brand-soft);color:var(--brand-2);text-decoration:none}
.nav a[aria-current="page"]{background:var(--brand-soft);color:var(--brand-2)}
.head-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.search{display:flex;align-items:center;gap:6px;background:var(--bg-2);border:1px solid var(--line);
  border-radius:999px;padding:6px 12px}
.search input{border:0;background:transparent;outline:none;font-size:14px;width:150px}
.head-cta{background:var(--brand);color:#fff;padding:9px 14px;border-radius:999px;font-weight:650;font-size:14px}
.head-cta:hover{background:var(--brand-2);text-decoration:none;color:#fff}
.burger{display:none}

/* ---------- generic blocks ---------- */
.sec{padding:34px 0}
.sec.tight{padding:22px 0}
.sec.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.lead{font-size:17px;color:var(--ink-2);max-width:70ch}
.crumbs{font-size:13px;color:var(--muted);padding:12px 0 0}
.crumbs a{color:var(--muted)}
.cta-row{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 0}
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--brand);background:var(--brand);
  color:#fff;padding:11px 18px;border-radius:10px;font-weight:650;font-size:15px;cursor:pointer}
.btn:hover{background:var(--brand-2);text-decoration:none;color:#fff}
.btn.ghost{background:#fff;color:var(--brand);border-color:var(--line)}
.btn.ghost:hover{background:var(--brand-soft);color:var(--brand-2)}
.btn.small{padding:8px 12px;font-size:14px;border-radius:9px;width:100%;justify-content:center}
.grid{display:grid;gap:var(--gap)}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:1024px){.g4{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:820px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
/* small-phone tuning (390px-430px class devices) */
@media(max-width:430px){
  .wrap{padding:0 14px}
  h1{font-size:24px}
  .fact b{font-size:16px}
  .calc{padding:14px}
  .pcard .body{padding:11px}
  .btn{padding:10px 14px;font-size:14.5px}
}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.card.soft{background:var(--bg-2)}
.note{background:var(--warn-bg);border:1px solid #ffe6b0;color:var(--warn);
  border-radius:var(--radius-sm);padding:12px 14px;font-size:14.5px}
.src{font-size:12.5px;color:var(--muted)}

/* ---------- hero ---------- */
.hero{padding:26px 0 8px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}
.hero-media{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--bg-2)}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0 0}
@media(max-width:760px){.facts{grid-template-columns:repeat(2,minmax(0,1fr))}}
.fact{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px}
.fact b{display:block;font-size:18px}
.fact span{font-size:12.5px;color:var(--muted)}

/* ---------- calculator ---------- */
.calc{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:900px){.calc-grid{grid-template-columns:1fr}}
.calc label{display:block;font-weight:650;font-size:13.5px;margin:10px 0 4px}
.calc input,.calc select{width:100%;padding:10px 12px;border:1px solid var(--line);
  border-radius:10px;font-size:15px;background:#fff;color:var(--ink)}
.calc .row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.out table{width:100%;border-collapse:collapse;font-size:14.5px}
.out th,.out td{padding:8px 4px;border-bottom:1px solid var(--line-2);text-align:left;vertical-align:top}
.out th{color:var(--muted);font-weight:600;width:54%}
.out tr.total th,.out tr.total td{font-weight:800;font-size:17px;color:var(--brand);border-bottom:0}
.calc-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.calc-actions .btn{padding:9px 13px;font-size:14px}

/* ---------- filters + product grid ---------- */
.shop{display:grid;grid-template-columns:250px 1fr;gap:22px;align-items:start}
@media(max-width:900px){.shop{grid-template-columns:1fr}}
.filters{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;position:sticky;top:78px}
.filters h3{font-size:14px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 10px}
.filters label{display:block;font-size:13.5px;font-weight:600;margin:10px 0 4px}
.filters input,.filters select{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:9px;font-size:14px}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 0}
.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 11px;font-size:13px;cursor:pointer;color:var(--ink-2)}
.chip[aria-pressed="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
.f-count{font-size:13px;color:var(--muted);margin:10px 0 0}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
@media(max-width:1080px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.cards{grid-template-columns:1fr}}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column}
.pcard .thumb{aspect-ratio:4/3;background:var(--bg-2);overflow:hidden}
.pcard .thumb img,.pcard .thumb picture{width:100%;height:100%;object-fit:cover}
.pcard .thumb .ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:13px;background:
  repeating-linear-gradient(45deg,#f4f8f6,#f4f8f6 10px,#eef4f1 10px,#eef4f1 20px)}
.pcard .body{padding:12px 13px 14px;display:flex;flex-direction:column;gap:6px;flex:1}
.pcard h3{margin:0;font-size:16.5px}
.pcard .fin{font-size:13.5px;color:var(--muted)}
.pcard .meta{font-size:13px;color:var(--ink-2)}
.pcard .price{font-weight:800;font-size:16px;color:var(--brand)}
.pcard .price small{display:block;font-weight:600;color:var(--muted);font-size:12.5px}
.pcard .tagset{display:flex;gap:5px;flex-wrap:wrap;margin-top:2px}
.tag{font-size:11.5px;font-weight:700;border-radius:999px;padding:2px 8px;background:var(--brand-soft);color:var(--brand-2)}
.tag.warn{background:var(--warn-bg);color:var(--warn)}
.pcard .acts{margin-top:auto;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.empty{padding:24px;border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);text-align:center}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.data{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
table.data th,table.data td{padding:10px 12px;border-bottom:1px solid var(--line-2);text-align:left;white-space:nowrap}
table.data th{background:var(--bg-2);font-weight:700;color:var(--ink-2);position:sticky;top:0}
table.data tr:last-child td{border-bottom:0}

/* ---------- pdp ---------- */
.pdp{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:start}
@media(max-width:900px){.pdp{grid-template-columns:1fr}}
.gallery{display:grid;gap:10px}
.gallery .main{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-2)}
.gallery .thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.gallery .thumbs img{border:1px solid var(--line);border-radius:10px;aspect-ratio:4/3;object-fit:cover}
.sku-line{font-size:14px;color:var(--muted)}
.sku-line b{color:var(--ink);font-size:16px}
.price-box{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:12px 0}
.price-box table{width:100%;border-collapse:collapse;font-size:15px}
.price-box th,.price-box td{padding:10px 12px;border-bottom:1px solid var(--line-2);text-align:left}
.price-box thead th{background:var(--bg-2)}
.price-box tr:last-child td{border-bottom:0}

/* ---------- faq ---------- */
details.faq{border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px;background:#fff;margin-bottom:8px}
details.faq summary{cursor:pointer;font-weight:650}
details.faq p{margin:8px 0 0}

/* ---------- footer ---------- */
footer.site{background:#0f1f18;color:#cfe0d8;margin-top:40px;padding:34px 0 26px}
footer.site a{color:#eaf4ef}
footer.site h4{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.07em}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:22px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}
.foot-list{list-style:none;padding:0;margin:0;font-size:14px}
.foot-list li{margin:5px 0}
.foot-legal{border-top:1px solid #234034;margin-top:22px;padding-top:14px;font-size:12.5px;color:#9fb6ab}
.preview-banner{background:var(--warn-bg);color:var(--warn);border-bottom:1px solid #ffe6b0;
  font-size:13px;text-align:center;padding:7px 12px;font-weight:600}

/* mobile drawer for filters */
.drawer-toggle{display:none}
@media(max-width:900px){
  .filters{position:fixed;left:0;right:0;bottom:0;top:auto;max-height:82vh;overflow:auto;
    border-radius:16px 16px 0 0;transform:translateY(102%);transition:transform .22s ease;z-index:60}
  .filters.open{transform:translateY(0)}
  .drawer-toggle{display:inline-flex;margin:0 0 12px}
  .nav{display:none}
  .burger{display:inline-flex;margin-left:auto}
  .nav.open{display:flex;position:absolute;left:0;right:0;top:100%;background:#fff;
    border-bottom:1px solid var(--line);padding:10px 20px;flex-direction:column}
  .search input{width:110px}
}
@media print{
  .top,.filters,.calc-actions,.preview-banner,footer.site,.burger{display:none!important}
  body{background:#fff}
  .calc{box-shadow:none}
}