:root{--ink:#2b2111;--cream:#f4c84a;--paper:#fff8dc;--gold:#d89b00;--rust:#7a4a00;--muted:#6f5a24;--line:#d5a92f;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:Inter,Arial,sans-serif;line-height:1.65}a{color:inherit}img{max-width:100%}.topbar{background:#3a2a05;color:#fff7d6;font-size:.84rem;padding:.55rem 4vw;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}.topbar a{color:#ffd95a}.nav{position:sticky;top:0;z-index:30;background:rgba(244,200,74,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav-inner{max-width:var(--max);margin:auto;display:flex;align-items:center;justify-content:space-between;padding:1rem 20px}.brand{font-family:Georgia,serif;font-weight:700;font-size:1.3rem;text-decoration:none}.brand span{color:var(--rust)}.menu{display:flex;align-items:center;gap:1.15rem}.menu a{text-decoration:none;font-weight:650;font-size:.92rem}.dropdown{position:relative}.mega{display:none;position:absolute;top:100%;right:0;background:var(--paper);padding:1rem;width:650px;grid-template-columns:repeat(3,1fr);box-shadow:0 20px 50px #0002;border:1px solid var(--line)}.dropdown:hover .mega{display:grid}.mega h4{margin:.2rem 0;color:var(--rust)}.mega a{display:block;padding:.25rem 0;font-weight:500}.menu-toggle{display:none;background:none;border:1px solid var(--ink);padding:.5rem}.hero{max-width:var(--max);margin:auto;padding:6rem 20px 4rem;display:grid;grid-template-columns:1.25fr .75fr;gap:4rem;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.75rem;font-weight:800;color:var(--rust)}h1,h2,h3{font-family:Georgia,serif;line-height:1.12}h1{font-size:clamp(2.7rem,6vw,5.6rem);margin:.35rem 0 1.2rem}h2{font-size:clamp(2rem,4vw,3.5rem)}h3{font-size:1.45rem}.lead{font-size:1.15rem;color:#4d4944;max-width:760px}.btns{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.6rem}.btn{display:inline-block;text-decoration:none;padding:.82rem 1.1rem;border:1px solid var(--ink);font-weight:750}.btn.primary{background:var(--ink);color:white}.hero-art{aspect-ratio:500/343;border-radius:10px;background:url('../../images/benson-polymeric-hplc-columns.webp') center/contain no-repeat;position:relative;box-shadow:0 25px 80px #0002}.hero-art:after{content:none}.section{padding:4.5rem 20px}.section.dark{background:var(--ink);color:#fff}.section.paper{background:var(--paper)}.wrap{max-width:var(--max);margin:auto}.section-head{display:flex;justify-content:space-between;align-items:end;gap:2rem;margin-bottom:2rem}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.card{background:var(--paper);border:1px solid var(--line);padding:1.35rem;position:relative;transition:.2s}.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px #0001}.card a{text-decoration:none}.dark .card{background:#282522;border-color:#4a443d}.tag{display:inline-block;background:#f2cf63;padding:.18rem .5rem;font-size:.75rem;font-weight:800;margin:.15rem}.dark .tag{background:#4a4031}.table-wrap{overflow:auto;border:1px solid var(--line);background:var(--paper)}table{width:100%;border-collapse:collapse;min-width:850px}th,td{padding:.72rem;border-bottom:1px solid var(--line);text-align:left}th{background:#5b3b00;color:#fff8dc;position:sticky;top:0}.filters{display:grid;grid-template-columns:2fr repeat(3,1fr) auto;gap:.65rem;margin:1rem 0}.filters input,.filters select,.form input,.form textarea,.form select{width:100%;padding:.8rem;border:1px solid #aaa;background:white}.stat{font-family:Georgia,serif;font-size:2rem}.breadcrumbs{font-size:.82rem;color:var(--muted);margin-bottom:1rem}.content-grid{display:grid;grid-template-columns:2fr 1fr;gap:2rem}.aside{background:#f0cf6a;padding:1.2rem;height:max-content}.faq details{border-top:1px solid var(--line);padding:1rem 0}.faq summary{font-weight:800;cursor:pointer}.footer{background:#3a2a05;color:#fff4c2;padding:3rem 20px}.footer-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem}.footer a{color:#ffd85a}.notice{border-left:4px solid var(--gold);padding:1rem;background:#fff1b8}.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:white;padding:10px;z-index:99}.crumb-page{padding-top:2rem}.chipbar{display:flex;gap:.5rem;flex-wrap:wrap}.chip{border:1px solid currentColor;padding:.35rem .6rem;text-decoration:none}.no-results{display:none;padding:1rem}.counter{font-variant-numeric:tabular-nums}
@media(max-width:900px){.hero,.content-grid{grid-template-columns:1fr}.hero-art{max-width:480px}.grid{grid-template-columns:repeat(2,1fr)}.menu-toggle{display:block}.menu{display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);padding:1rem;flex-direction:column;align-items:flex-start}.menu.open{display:flex}.mega{position:static;display:grid!important;width:auto;box-shadow:none;grid-template-columns:1fr;border:0;padding:.6rem}.filters{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}}
@media(max-width:600px){.grid{grid-template-columns:1fr}.filters{grid-template-columns:1fr}.hero{padding-top:3rem}.topbar{font-size:.75rem}.section{padding:3rem 16px}}

/* Products mega-menu: centered horizontal dropdown */
@media (min-width:901px){
  .dropdown{position:relative;padding-bottom:0}
  .dropdown>.mega{
    display:grid;
    visibility:hidden;
    opacity:0;
    pointer-events:none;
    position:absolute;
    top:calc(100% + 16px);
    left:50%;
    right:auto;
    transform:translateX(-50%) translateY(8px);
    width:min(860px,92vw);
    grid-template-columns:1fr 1fr 1.15fr;
    gap:0;
    padding:1.35rem 1.5rem;
    border-top:3px solid var(--gold);
    border-radius:0 0 4px 4px;
    box-shadow:0 18px 45px rgba(0,0,0,.16);
    transition:opacity .18s ease,transform .18s ease,visibility .18s;
    z-index:60;
  }
  .dropdown>.mega::before{
    content:"";
    position:absolute;
    left:0;
    right:0;
    top:-18px;
    height:18px;
  }
  .dropdown:hover>.mega,
  .dropdown:focus-within>.mega{
    visibility:visible;
    opacity:1;
    pointer-events:auto;
    transform:translateX(-50%) translateY(0);
  }
  .mega>div{padding:0 1.25rem;min-width:0}
  .mega>div:first-child{padding-left:.25rem}
  .mega>div:last-child{padding-right:.25rem}
  .mega>div+div{border-left:1px solid var(--line)}
  .mega h4{margin:0 0 .55rem;font-size:1rem}
  .mega a{padding:.34rem 0;white-space:nowrap}
  .mega a:hover,.mega a:focus{color:var(--rust);transform:translateX(3px)}
}

@media(max-width:900px){
  .mega{transform:none!important;visibility:visible!important;opacity:1!important;pointer-events:auto!important}
}


/* Product specification tables */
.product-spec-section{padding-top:2rem}.product-spec-table{min-width:1100px}.product-spec-table th{white-space:nowrap}.product-spec-table td{vertical-align:top}.table-note{font-size:.92rem;opacity:.8;margin-top:.8rem}

/* Deep yellow theme refinements */
body{background:linear-gradient(180deg,#f4c84a 0%,#f7d86f 42%,#f9e7a2 100%)}
.nav{box-shadow:0 4px 18px rgba(82,55,0,.12)}
.hero,.section{background:transparent}
.section.paper,.card,.table-wrap,.mega,.menu{background:var(--paper)}
.btn.primary{background:#4a3100;border-color:#4a3100;color:#fff6cf}
.btn:hover{background:#d89b00;color:#2b2111;border-color:#d89b00}
.card{box-shadow:0 8px 24px rgba(94,63,0,.08)}
.card:hover{box-shadow:0 18px 42px rgba(94,63,0,.16)}
.faq details{background:rgba(255,248,220,.62);padding:1rem;border:1px solid rgba(122,74,0,.18);border-radius:8px;margin:.65rem 0}
.faq summary,.faq-item summary{color:#5c3900}
.hero-art{background-color:#fff5c7;border:5px solid #d89b00}
.eyebrow,.mega h4,.brand span{color:#7a4a00}
.notice{border-left-color:#d89b00}


/* Premium Navigation Redesign */
.navbar,.nav-container{background:transparent!important;box-shadow:none!important}
.nav-menu,.nav-links{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.nav-menu a,.nav-links a,nav ul li a{
display:inline-flex;
align-items:center;
justify-content:center;
padding:12px 18px;
min-height:44px;
background:linear-gradient(#d9a91c,#c89300);
border:1px solid #9a7000;
border-radius:12px;
color:#2f1b00!important;
font-weight:700;
text-decoration:none;
transition:all .3s ease;
box-shadow:0 2px 6px rgba(0,0,0,.12);
}
.nav-menu a:hover,.nav-links a:hover,nav ul li a:hover{
background:#4b2f00!important;
color:#fff!important;
transform:translateY(-2px);
box-shadow:0 8px 18px rgba(0,0,0,.25);
}
nav ul li.active>a,.nav-menu a.active,.nav-links a.active{
background:#5b3900!important;
color:#fff!important;
border-color:#d9a91c;
}
.logo,.site-logo{background:none!important;border:none!important;box-shadow:none!important;padding-right:20px}
header{padding-top:6px;padding-bottom:6px}


/* Final navigation fit and equal-button sizing */
html,body{max-width:100%;overflow-x:hidden}
.nav-inner{width:100%;max-width:1380px;padding:.8rem 18px;gap:20px}
.brand{flex:0 0 auto;white-space:nowrap;background:none!important;border:0!important;box-shadow:none!important;padding:0!important;margin:0!important;transform:none!important}
.menu{flex:1;justify-content:flex-end;gap:10px;min-width:0;flex-wrap:nowrap}
.menu>a,.menu>.dropdown>a{
  display:inline-flex!important;
  align-items:center!important;
  justify-content:center!important;
  width:126px!important;
  min-width:126px!important;
  min-height:44px!important;
  padding:10px 12px!important;
  margin:0!important;
  border-radius:10px!important;
  background:linear-gradient(180deg,#dda91d,#c99100)!important;
  border:1px solid #9a7000!important;
  color:#2f1b00!important;
  font-size:.88rem!important;
  font-weight:750!important;
  line-height:1.15!important;
  text-align:center!important;
  white-space:normal!important;
  text-decoration:none!important;
  box-shadow:0 2px 6px rgba(0,0,0,.12)!important;
  transition:background .25s ease,color .25s ease,transform .25s ease,box-shadow .25s ease!important;
}
.menu>a:hover,.menu>a:focus,.menu>.dropdown>a:hover,.menu>.dropdown>a:focus{
  background:#4b2f00!important;
  color:#fff8dc!important;
  transform:translateY(-2px)!important;
  box-shadow:0 7px 16px rgba(0,0,0,.22)!important;
}
.dropdown{flex:0 0 126px}
.dropdown>.mega a{width:auto!important;min-width:0!important;min-height:0!important;background:transparent!important;border:0!important;box-shadow:none!important;border-radius:0!important;margin:0!important;padding:.34rem 0!important;display:block!important;color:var(--ink)!important;text-align:left!important;font-size:.9rem!important;transform:none!important}
.dropdown>.mega a:hover,.dropdown>.mega a:focus{color:var(--rust)!important;background:transparent!important;box-shadow:none!important;transform:translateX(3px)!important}
@media(max-width:1180px) and (min-width:901px){
  .nav-inner{max-width:100%;padding:.7rem 12px;gap:12px}
  .brand{font-size:1.12rem}
  .menu{gap:7px}
  .menu>a,.menu>.dropdown>a{width:108px!important;min-width:108px!important;padding:9px 7px!important;font-size:.79rem!important}
  .dropdown{flex-basis:108px}
}
@media(max-width:900px){
  .nav-inner{padding:.75rem 16px}
  .menu{flex-wrap:wrap;gap:8px;align-items:stretch}
  .menu>a,.menu>.dropdown,.menu>.dropdown>a{width:100%!important;min-width:100%!important;flex-basis:100%!important}
  .menu>.dropdown>a{display:flex!important}
  .dropdown>.mega a{width:100%!important;min-width:0!important}
}


/* Final header cleanup: transparent menu strip and spaced brand name */
.menu{background:transparent!important;}
.brand{letter-spacing:.01em;}
.brand span{margin-left:.18em;}
html { scroll-behavior: smooth; }
.aside .btn { display:inline-flex; align-items:center; justify-content:center; min-width:190px; margin:8px 10px 12px 0; }
.aside .btn.secondary { background:#fff4c2; color:#3a2a05; border:2px solid #3a2a05; }
.aside .btn.secondary:hover { background:#3a2a05; color:#fff4c2; }
#specifications { scroll-margin-top: 110px; }


/* Answer-first content for SEO, AEO and generative search */
.geo-answer-box{margin:1.25rem 0 1.75rem;padding:1.15rem 1.25rem;background:rgba(255,248,220,.78);border:1px solid rgba(122,74,0,.28);border-left:5px solid #7a4a00;border-radius:12px;box-shadow:0 8px 22px rgba(74,49,0,.08)}
.geo-answer-box h2{font-size:1.18rem;margin:0 0 .55rem;color:#4a3100}
.geo-answer-box p{margin:.25rem 0 .65rem;max-width:82ch}
.geo-answer-box ul{display:flex;gap:.5rem 1.4rem;flex-wrap:wrap;margin:.3rem 0 0;padding-left:1.15rem}
.geo-answer-box li{flex:1 1 240px}
@media(max-width:700px){.geo-answer-box{padding:1rem}.geo-answer-box ul{display:block}}