/* Zuol Instruments — site stylesheet
   Palette: white, mist (brushed steel), steel, navy ink, logo blue. */
:root{
  --white:#ffffff;
  --mist:#eef3f3;
  --mist-2:#dde6e6;
  --steel:#6b7f86;
  --steel-2:#a6b5b9;
  --ink:#083f54;
  --ink-2:#1b4d61;
  --blue:#2a8a8c;
  --blue-dark:#1f6f73;
  --rule:#d2dcdd;
  --max:1180px;
  --gutter:clamp(16px,4vw,48px);
  --serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --sans:"Instrument Sans","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--white);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.55;font-feature-settings:"kern","liga";}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-dark);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--ink)}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:2px}
h1,h2,h3,h4{font-family:var(--serif);font-weight:400;line-height:1.08;margin:0 0 .4em;letter-spacing:-.005em}
h1{font-size:clamp(40px,6vw,76px)}
h2{font-size:clamp(32px,4.2vw,52px)}
h3{font-size:clamp(24px,2.6vw,32px)}
h4{font-size:22px}
p{margin:0 0 1em;max-width:62ch}
.lede{font-size:clamp(19px,1.6vw,22px);color:var(--ink-2);max-width:56ch}
.muted{color:var(--steel)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.band{padding:clamp(56px,8vw,112px) 0}
.band-mist{background:var(--mist)}
.band-ink{background:var(--ink);color:#e8eef3}
.band-ink h2,.band-ink h3{color:#fff}
.band-ink a{color:#9fd6d8}
.rule{border:0;border-top:1px solid var(--rule);margin:0}

/* Buttons */
.btn{display:inline-block;font:600 16px/1 var(--sans);padding:16px 24px;border-radius:3px;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--blue-dark);color:#fff}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.band-ink .btn-primary{background:var(--blue);color:#fff}
.band-ink .btn-primary:hover{background:#fff;color:var(--ink)}
.band-ink .btn-ghost{color:#fff;border-color:#fff}
.band-ink .btn-ghost:hover{background:#fff;color:var(--ink)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--rule)}
.site-header .wrap{display:flex;align-items:center;gap:28px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand img{width:40px;height:auto}
.brand b{font-family:var(--serif);font-weight:400;font-size:24px;letter-spacing:.01em;white-space:nowrap}
.brand small{display:block;font-size:12px;color:var(--steel);letter-spacing:.04em;margin-top:-2px}
.nav{margin-left:auto;display:flex;align-items:center;gap:20px}
.nav a{font-weight:500;font-size:15px;text-decoration:none;color:var(--ink-2);white-space:nowrap}
.nav a:hover,.nav a[aria-current="page"]{color:var(--blue-dark)}
.nav .btn{padding:12px 18px}
.nav a.btn-primary{color:#fff}
.nav a.btn-primary:hover{color:#fff;background:var(--blue-dark)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--rule);border-radius:3px;padding:10px 12px;font:600 15px var(--sans);color:var(--ink);cursor:pointer}
@media (max-width:1000px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:72px;background:#fff;border-bottom:1px solid var(--rule);flex-direction:column;align-items:stretch;gap:0;padding:8px 0 16px}
  .nav.open{display:flex}
  .nav a{padding:12px var(--gutter)}
  .nav .btn{margin:8px var(--gutter) 0;text-align:center}
}

/* Hero */
.hero{padding:clamp(40px,6vw,80px) 0 0}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(24px,5vw,72px);align-items:end;margin-bottom:clamp(28px,4vw,48px)}
.hero h1{margin-bottom:0;font-size:clamp(40px,5.4vw,68px);max-width:16ch}
.hero .lede{margin-bottom:0}
.hero-figure{position:relative;margin:0;border-top:1px solid var(--rule);padding-top:clamp(16px,2vw,28px)}
.hero-figure img{width:100%}
.callout{position:absolute;font-size:13px;line-height:1.3;color:var(--ink-2);background:rgba(255,255,255,.92);padding:6px 9px;border-left:2px solid var(--blue);max-width:180px}
.callout b{display:block;font-weight:600;color:var(--ink)}
.hero-spec{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);margin-top:clamp(28px,4vw,56px)}
.hero-spec div{padding:18px 20px 18px 0;border-right:1px solid var(--rule);font-size:15px;color:var(--steel)}
.hero-spec div+div{padding-left:20px}
.hero-spec div:last-child{border-right:0}
.hero-spec b{display:block;font-family:var(--serif);font-weight:400;font-size:26px;color:var(--ink);line-height:1.1;margin-bottom:4px}
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr}
  .hero-spec{grid-template-columns:1fr 1fr}
  .hero-spec div:nth-child(2){border-right:0}
  .hero-spec div:nth-child(n+3){border-top:1px solid var(--rule)}
  .hero-spec div:nth-child(3){padding-left:0}
  .callout{display:none}
}

/* Section heads */
.sec-head{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,3fr);gap:24px clamp(24px,5vw,72px);align-items:start;margin-bottom:clamp(32px,4vw,56px)}
.sec-head h2{margin:0}
.sec-head p{margin:6px 0 0}
@media (max-width:760px){.sec-head{grid-template-columns:1fr}}

/* Product lines — full-width rows */
.lines{border-top:1px solid var(--rule)}
.line{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(20px,4vw,64px);padding:clamp(28px,4vw,48px) 0;border-bottom:1px solid var(--rule);align-items:center}
.line-media{background:var(--mist);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;overflow:hidden}
.line-media img{width:100%;height:100%;object-fit:cover}
.line-media.contain img{object-fit:contain;padding:12%}
.line-media.white{background:#fff;border:1px solid var(--rule)}
.line h3{margin-bottom:.25em}
.line h3 a{color:inherit;text-decoration:none}
.line h3 a:hover{color:var(--blue-dark)}
.line .sub{color:var(--steel);margin-bottom:.9em}
.line ul{list-style:none;padding:0;margin:0 0 18px;display:flex;flex-wrap:wrap;gap:8px 10px}
.line li{font-size:14px;color:var(--ink-2);background:var(--mist);padding:5px 10px;border-radius:2px}
.line .more{font-weight:600;text-decoration:none}
@media (max-width:760px){.line{grid-template-columns:1fr}}

/* Process steps (a genuine sequence) */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--rule)}
.step{padding:28px 28px 28px 0;border-right:1px solid var(--rule)}
.step+.step{padding-left:28px}
.step:last-child{border-right:0}
.step .n{font-family:var(--serif);font-size:44px;line-height:1;color:var(--blue);margin-bottom:14px}
.step h4{margin-bottom:.3em}
.step p{font-size:15.5px;color:var(--ink-2);margin:0}
@media (max-width:860px){.steps{grid-template-columns:1fr 1fr}.step:nth-child(2){border-right:0}.step:nth-child(3){padding-left:0}.step:nth-child(n+3){border-top:1px solid var(--rule)}}
@media (max-width:520px){.steps{grid-template-columns:1fr}.step{border-right:0;padding-left:0}.step+.step{border-top:1px solid var(--rule)}}

/* Spec table (facts) */
.spec{width:100%;border-collapse:collapse;font-size:16px}
.spec th,.spec td{text-align:left;padding:14px 0;border-bottom:1px solid var(--rule);vertical-align:top}
.spec th{font-weight:500;color:var(--steel);width:38%;padding-right:20px}
.spec td{color:var(--ink)}
.band-ink .spec th,.band-ink .spec td{border-color:#2b5c6c}
.band-ink .spec th{color:#a3bfc6}
.band-ink .spec td{color:#fff}
.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(28px,5vw,80px);align-items:start}
@media (max-width:860px){.two-col{grid-template-columns:1fr}}

/* Quote strip */
.quote-strip .wrap{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:32px;align-items:center}
.quote-strip h2{margin:0 0 .3em}
.quote-strip p{margin:0}
@media (max-width:760px){.quote-strip .wrap{grid-template-columns:1fr}}

/* Page intro */
.page-intro{padding:clamp(40px,6vw,80px) 0 clamp(24px,4vw,48px)}
.page-intro h1{font-size:clamp(36px,5vw,64px)}
.crumbs{font-size:14px;color:var(--steel);margin-bottom:18px}
.crumbs a{color:var(--steel)}

/* Product groups on range pages */
.groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:0 clamp(20px,3vw,40px);border-top:1px solid var(--rule)}
.group{padding:22px 0;border-bottom:1px solid var(--rule)}
.group h4{margin-bottom:.3em;font-size:21px}
.group p{font-size:15px;color:var(--ink-2);margin:0}
.group .count{font-size:13px;color:var(--steel);display:block;margin-top:8px}

/* Forms */
.form{display:grid;grid-template-columns:1fr 1fr;gap:18px 20px;max-width:760px}
.form .full{grid-column:1/-1}
.form label{display:block;font-size:14px;font-weight:600;color:var(--ink-2);margin-bottom:6px}
.form input,.form select,.form textarea{width:100%;font:16px var(--sans);color:var(--ink);padding:12px 14px;border:1px solid var(--steel-2);border-radius:3px;background:#fff}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px rgba(42,138,140,.2)}
.form textarea{min-height:140px;resize:vertical}
.form .hp{position:absolute;left:-9999px;opacity:0}
.form-note{font-size:14px;color:var(--steel)}
.notice{padding:14px 16px;border-left:3px solid var(--blue);background:var(--mist);font-size:15px}
@media (max-width:600px){.form{grid-template-columns:1fr}}

/* Blog */
.posts{border-top:1px solid var(--rule)}
.post-item{display:grid;grid-template-columns:140px minmax(0,1fr);gap:24px;padding:26px 0;border-bottom:1px solid var(--rule)}
.post-item time{font-size:14px;color:var(--steel)}
.post-item h3{font-size:26px;margin-bottom:.25em}
.post-item h3 a{color:inherit;text-decoration:none}
.post-item h3 a:hover{color:var(--blue-dark)}
.post-item p{margin:0;color:var(--ink-2)}
@media (max-width:600px){.post-item{grid-template-columns:1fr;gap:6px}}
.article{max-width:720px}
.article p,.article li{font-size:18px;line-height:1.65}
.article h2{font-size:32px;margin-top:1.4em}
.article h3{font-size:24px;margin-top:1.2em}

/* Footer */
.site-footer{border-top:1px solid var(--rule);padding:48px 0 32px;font-size:15px;color:var(--ink-2)}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:32px}
.site-footer h4{font-family:var(--sans);font-weight:600;font-size:14px;color:var(--steel);margin:0 0 12px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:0 0 8px}
.site-footer a{text-decoration:none;color:var(--ink-2)}
.site-footer a:hover{color:var(--blue-dark)}
.foot-legal{margin-top:36px;padding-top:18px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.5px;color:var(--steel)}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* WhatsApp button */
.wa{position:fixed;right:18px;bottom:18px;z-index:60;display:flex;align-items:center;gap:10px;background:#1fae5a;color:#fff;text-decoration:none;font:600 15px var(--sans);padding:12px 16px 12px 12px;border-radius:999px;box-shadow:0 6px 18px rgba(8,63,84,.22)}
.wa:hover{background:#178f49;color:#fff}
.wa svg{width:26px;height:26px;fill:#fff}
@media (max-width:600px){.wa span{display:none}.wa{padding:12px}}

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

/* ---------- Catalogue ---------- */
.btn-sm{padding:10px 14px;font-size:14px}
.cat-tools{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr) minmax(0,1fr);gap:12px;margin-bottom:18px}
.cat-tools input,.cat-tools select{width:100%;font:16px var(--sans);color:var(--ink);padding:12px 14px;border:1px solid var(--steel-2);border-radius:3px;background:#fff}
.cat-tools input:focus,.cat-tools select:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px rgba(42,138,140,.2)}
@media (max-width:760px){.cat-tools{grid-template-columns:1fr}}
.summary{color:var(--steel);font-size:15px;margin:0 0 18px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:22px 20px}
.card{display:flex;flex-direction:column;border:1px solid var(--rule);background:#fff;min-width:0}
.card-media{display:block;aspect-ratio:1;background:#fff;border-bottom:1px solid var(--rule);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:contain;padding:8%}
.card-body{padding:14px 14px 16px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-cat{font-size:12.5px;color:var(--steel)}
.card h3{font-family:var(--sans);font-weight:500;font-size:15.5px;line-height:1.35;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a:hover{color:var(--blue-dark)}
.card-meta{font-size:13px;color:var(--ink-2);margin-top:auto}
.card .add-btn{align-self:flex-start}
.pager{display:flex;flex-wrap:wrap;gap:6px;margin-top:28px}
.pager button{font:500 14px var(--sans);padding:9px 13px;border:1px solid var(--rule);background:#fff;color:var(--ink);border-radius:3px;cursor:pointer}
.pager button[aria-current="page"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.toast{position:fixed;left:50%;bottom:84px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 18px;border-radius:3px;font-size:15px;z-index:70;max-width:min(92vw,520px);box-shadow:0 8px 24px rgba(8,63,84,.25)}
.basket-link{position:relative}
.basket-link .count{display:inline-block;min-width:20px;padding:1px 6px;margin-left:6px;border-radius:999px;background:var(--mist-2);color:var(--ink);font-size:12px;font-weight:600;text-align:center}
.basket-link.has-items .count{background:var(--blue);color:#fff}
.item-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(24px,4vw,56px);padding:clamp(24px,4vw,48px) 0 clamp(40px,6vw,80px)}
.item-media{border:1px solid var(--rule);background:#fff;aspect-ratio:1;display:flex;align-items:center;justify-content:center}
.item-media img{width:100%;height:100%;object-fit:contain;padding:6%}
.item-grid h1{font-size:clamp(28px,3.4vw,42px)}
.item-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:22px 0 10px}
.item-actions label{font-size:14px;font-weight:600;color:var(--ink-2)}
.item-actions input{width:96px;font:16px var(--sans);padding:9px 10px;border:1px solid var(--steel-2);border-radius:3px}
@media (max-width:760px){.item-grid{grid-template-columns:1fr}}
.basket{width:100%;border-collapse:collapse;font-size:15px}
.basket th,.basket td{text-align:left;padding:12px 10px 12px 0;border-bottom:1px solid var(--rule);vertical-align:middle}
.basket th{font-weight:600;color:var(--steel);font-size:13px}
.basket img{width:64px;height:64px;object-fit:contain;border:1px solid var(--rule);background:#fff}
.basket input{width:84px;font:15px var(--sans);padding:8px;border:1px solid var(--steel-2);border-radius:3px}
.link-btn{background:none;border:0;color:var(--blue-dark);font:500 14px var(--sans);cursor:pointer;text-decoration:underline;text-underline-offset:3px;padding:0}
.link-btn:hover{color:var(--ink)}
.line-cta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:8px}

/* Social links */
.social{display:flex;gap:10px;margin-top:16px}
.social a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--rule);border-radius:50%;color:var(--ink-2)}
.social a:hover{border-color:var(--blue);color:var(--blue-dark)}
.social svg{width:18px;height:18px;fill:currentColor}
.social svg[fill="none"]{fill:none}
.social a svg{max-width:18px;max-height:18px}
@media (max-width:600px){.site-footer{padding-bottom:84px}}