/* ============================================================
   PANTHOS B2B Catalog — front-end
   Monocromo editoriale: Archivo (display) + Manrope (testo).
   Breakpoint: mobile <640, tablet 640–1023, desktop ≥1024.
   ============================================================ */

:root{
  --ink:#101010;
  --ink-soft:#4b4b4b;
  --ink-faint:#8a8a8a;
  --paper:#fdfdfc;
  --line:#e3e1dd;
  --line-strong:#101010;
  --accent:#101010;
  --radius:2px;
  --font-head:'Archivo',system-ui,sans-serif;
  --font-body:'Manrope',system-ui,sans-serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.55;
  color:var(--ink);
  background:var(--paper);
}
img{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;cursor:pointer}
input,select{font:inherit;color:inherit}

.visually-hidden{
  position:absolute!important;width:1px;height:1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0;padding:0;margin:-1px;
}

:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

/* ---------------------------------------------------------- Topbar */
.topbar{
  position:sticky;top:0;z-index:50;
  background:var(--paper);
  border-bottom:1px solid var(--line-strong);
}
.topbar-inner{
  max-width:1320px;margin:0 auto;padding:14px 20px;
  display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-logo{height:30px;width:auto}
.brand-name{
  font-family:var(--font-head);font-weight:800;font-size:20px;
  letter-spacing:.06em;white-space:nowrap;
}
.brand-sep{width:1px;height:18px;background:var(--line-strong)}
.brand-sub{
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink-soft);white-space:nowrap;
}
.toolbar{display:flex;gap:10px;flex:1;justify-content:flex-end;min-width:0}
.search-wrap{position:relative;flex:1;max-width:340px;min-width:160px}
.search-ico{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;color:var(--ink-faint);pointer-events:none;
}
#search{
  width:100%;padding:10px 12px 10px 36px;
  border:1px solid var(--line-strong);border-radius:var(--radius);
  background:transparent;
}
#search::placeholder{color:var(--ink-faint)}
#collectionFilter{
  padding:10px 12px;border:1px solid var(--line-strong);
  border-radius:var(--radius);background:transparent;max-width:220px;
}

/* --------------------------------------------------------- Catalog */
.catalog{max-width:1320px;margin:0 auto;padding:22px 20px 64px}
.catalog-meta{
  display:flex;justify-content:space-between;align-items:baseline;
  border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:22px;
}
#resultCount{
  margin:0;font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-soft);
}

.grid{
  display:grid;gap:26px 18px;
  grid-template-columns:repeat(2,1fr);
}
@media (min-width:640px){.grid{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1024px){.grid{grid-template-columns:repeat(4,1fr);gap:34px 24px}}

.card{
  border:0;background:none;padding:0;text-align:left;
  display:flex;flex-direction:column;gap:10px;
}
.card-img{
  aspect-ratio:4/3;background:#f3f2ef;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;overflow:hidden;
  border-radius:var(--radius);
}
.card-img img{
  width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;
  transition:transform .35s ease;
}
@media (prefers-reduced-motion:reduce){.card-img img{transition:none}}
.card:hover .card-img img,.card:focus-visible .card-img img{transform:scale(1.045)}
.card-img .noimg{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-faint)}
.card-title{
  font-family:var(--font-head);font-weight:600;font-size:15px;
  letter-spacing:.02em;margin:0;line-height:1.3;
}
.card-sub{margin:0;font-size:12px;color:var(--ink-soft)}
/* Notazione ottica: 51 □ 21 — 145 */
.card-fit{
  margin:0;font-size:12px;color:var(--ink-soft);
  font-variant-numeric:tabular-nums;letter-spacing:.04em;
}
.card-fit .sq{display:inline-block;margin:0 4px;font-size:10px;transform:translateY(-1px)}
.card-variants{
  margin:0;font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-faint);
}

/* ----------------------------------------------------------- Empty */
.empty{text-align:center;padding:80px 20px}
.empty-title{font-family:var(--font-head);font-weight:600;font-size:18px;margin:0 0 6px}
.empty-sub{margin:0;color:var(--ink-soft)}

/* ------------------------------------------------------ Pagination */
.pagination{
  display:flex;flex-wrap:wrap;gap:8px;justify-content:center;
  margin-top:44px;
}
.pagination button{
  min-width:40px;height:40px;padding:0 12px;
  border:1px solid var(--line-strong);border-radius:var(--radius);
  background:transparent;font-variant-numeric:tabular-nums;
}
.pagination button[aria-current="page"]{background:var(--ink);color:#fff}
.pagination button:disabled{opacity:.35;cursor:default}
.pagination .ell{align-self:center;color:var(--ink-faint)}

/* ------------------------------------------------------------ Foot */
.foot{border-top:1px solid var(--line-strong);background:var(--paper)}
.foot-inner{
  max-width:1320px;margin:0 auto;padding:20px;
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  font-size:12px;color:var(--ink-soft);
}
.foot p{margin:0}
.foot-contacts{display:flex;gap:18px}
.foot a{text-decoration:none;border-bottom:1px solid var(--line)}
.foot a:hover{border-bottom-color:var(--ink)}

/* ----------------------------------------------------------- Modal */
.modal{position:fixed;inset:0;z-index:100}
.modal[hidden]{display:none}
.modal-backdrop{position:absolute;inset:0;background:rgba(16,16,16,.45)}
.modal-panel{
  position:absolute;inset:auto 0 0 0;max-height:92dvh;
  background:var(--paper);border-top:2px solid var(--ink);
  overflow:auto;border-radius:8px 8px 0 0;
  animation:sheet .28s ease;
}
@keyframes sheet{from{transform:translateY(24px);opacity:.6}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){.modal-panel{animation:none}}
@media (min-width:1024px){
  .modal-panel{
    inset:5vh 0 auto 0;margin:0 auto;max-width:1040px;max-height:90vh;
    border:1px solid var(--ink);border-radius:var(--radius);
  }
}
.modal-close{
  position:sticky;top:10px;float:right;margin:10px 14px 0 0;
  width:38px;height:38px;border:1px solid var(--ink);border-radius:50%;
  background:var(--paper);font-size:20px;line-height:1;z-index:2;
}
.modal-body{padding:22px;clear:none}
@media (min-width:1024px){
  .modal-body{display:grid;grid-template-columns:1fr 1fr;gap:34px;padding:34px}
}

.pd-gallery{display:flex;flex-direction:column;gap:10px}
.pd-main{
  aspect-ratio:4/3;background:#f3f2ef;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.pd-main img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.pd-thumbs{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}
.pd-thumbs button{
  width:64px;height:52px;flex:0 0 auto;padding:0;background:#f3f2ef;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
}
.pd-thumbs button[aria-current="true"]{border-color:var(--ink)}
.pd-thumbs img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}

.pd-info{min-width:0}
.pd-eyebrow{
  margin:0 0 4px;font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ink-faint);
}
.pd-title{
  font-family:var(--font-head);font-weight:700;font-size:24px;
  margin:0 0 6px;line-height:1.2;letter-spacing:.01em;
}
.pd-fit{
  font-size:14px;color:var(--ink-soft);margin:0 0 16px;
  font-variant-numeric:tabular-nums;letter-spacing:.04em;
}
.pd-fit .sq{display:inline-block;margin:0 5px;font-size:11px;transform:translateY(-1px)}
.pd-desc{font-size:14px;color:var(--ink-soft);margin:0 0 20px;max-width:60ch}
.pd-desc p{margin:0 0 .7em}

.pd-section{
  margin:0 0 8px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:6px;
}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:24px;font-size:13.5px}
.spec-table th,.spec-table td{
  text-align:left;padding:8px 2px;border-bottom:1px solid var(--line);
  vertical-align:top;
}
.spec-table th{font-weight:500;color:var(--ink-soft);width:46%}
.spec-table td{font-weight:600}

.var-table{width:100%;border-collapse:collapse;font-size:13px;margin-bottom:8px}
.var-table th{
  text-align:left;padding:7px 8px;border-bottom:1px solid var(--ink);
  font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;
}
.var-table td{padding:8px;border-bottom:1px solid var(--line)}
.var-table td.sku{font-variant-numeric:tabular-nums;letter-spacing:.03em}
.var-table .avail{
  display:inline-block;width:7px;height:7px;border-radius:50%;
  background:#1d8a4b;margin-right:7px;transform:translateY(-1px);
}
.var-scroll{overflow-x:auto}

.pd-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.pd-tags span{
  font-size:11px;letter-spacing:.06em;border:1px solid var(--line);
  padding:3px 9px;border-radius:99px;color:var(--ink-soft);
}

/* ----------------------------------------------------- Skeleton */
.skel{border:1px solid var(--line);border-radius:var(--radius);aspect-ratio:4/3;background:#f3f2ef;position:relative;overflow:hidden}
.skel::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.7),transparent);
  animation:shimmer 1.2s infinite;
}
@keyframes shimmer{from{transform:translateX(-100%)}to{transform:translateX(100%)}}
@media (prefers-reduced-motion:reduce){.skel::after{animation:none}}

/* --------------------------------------------------------- Gate */
.gate-body{
  min-height:100dvh;display:flex;align-items:center;justify-content:center;
  padding:24px;
}
.gate{max-width:380px;width:100%;text-align:center}
.gate-brand{
  font-family:var(--font-head);font-weight:800;font-size:22px;
  letter-spacing:.06em;margin:0 0 26px;
}
.gate-title{font-family:var(--font-head);font-weight:600;font-size:19px;margin:0 0 8px}
.gate-sub{color:var(--ink-soft);font-size:14px;margin:0 0 22px}
.gate-error{
  color:#a4262c;background:#fbeaea;border:1px solid #efc7c9;
  border-radius:var(--radius);padding:10px 12px;font-size:13px;margin:0 0 14px;
}
.gate-form{display:flex;flex-direction:column;gap:10px}
.gate-form input{
  padding:12px 14px;border:1px solid var(--ink);border-radius:var(--radius);
  text-align:center;letter-spacing:.1em;
}
.gate-form button{
  padding:12px 14px;border:1px solid var(--ink);border-radius:var(--radius);
  background:var(--ink);color:#fff;font-weight:600;letter-spacing:.04em;
}
.gate-form button:hover{background:#000}
.gate-help{font-size:12.5px;color:var(--ink-soft);margin-top:20px}

/* ------------------------------------------------- Mobile dettagli */
@media (max-width:639px){
  .topbar-inner{padding:12px 14px}
  .brand-sub{display:none}
  .brand-sep{display:none}
  .toolbar{flex-basis:100%;justify-content:stretch}
  .search-wrap{max-width:none}
  #collectionFilter{max-width:46%}
  .catalog{padding:16px 14px 56px}
  .grid{gap:20px 12px}
  .pd-title{font-size:20px}
}