/* Sunflex Metalloy Pvt. Ltd. — gunmetalflange.com */
:root{
  --accent:#8B3F2F; --accent-2:#A85A45; --ink:#171717; --ink-2:#4a4a4a; --muted:#6b6b6b;
  --bg:#fff; --tech:#F6F5F3; --line:#DDDDDD; --max:1200px; --hdr:76px;
  --font:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{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;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .6em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.4vw,3.1rem);font-weight:700}
h2{font-size:clamp(1.5rem,2.8vw,2rem);font-weight:700}
h3{font-size:1.15rem;font-weight:650}
h4{font-size:1rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.2em;margin:0 0 1em}
li{margin-bottom:.35em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:200}
.skip:focus{left:0}
.eyebrow{display:block;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:.8em}
.eyebrow::before{content:"";display:inline-block;width:28px;height:2px;background:var(--accent);vertical-align:middle;margin-right:10px}
.lead{font-size:1.15rem;color:var(--ink-2);max-width:62ch}

/* top bar + header */
.topbar{background:var(--ink);color:#ddd;font-size:.82rem}
.topbar .wrap{display:flex;justify-content:space-between;gap:16px;padding-top:7px;padding-bottom:7px;flex-wrap:wrap}
.topbar a{color:#fff;text-decoration:none}.topbar a:hover{text-decoration:underline;color:#fff}
.topbar .tb-sep{margin-left:22px}
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .25s}
.site-header.scrolled{box-shadow:0 2px 14px rgba(0,0,0,.08)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:28px;height:var(--hdr);transition:height .25s}
.site-header.scrolled .wrap{height:62px}
.brand img{height:46px;width:auto;transition:height .25s}
.site-header.scrolled .brand img{height:40px}
.nav-list{display:flex;list-style:none;margin:0;padding:0;gap:2px;align-items:center}
.nav-list>li{position:relative;margin:0;display:flex;align-items:center}
.nav-list a.nl{display:block;padding:10px 9px;white-space:nowrap;color:var(--ink);text-decoration:none;font-size:.9rem;font-weight:600;border-bottom:2px solid transparent}
.nav-list a.nl:hover,.nav-list a.nl.active{color:var(--accent);border-bottom-color:var(--accent)}
.dd-toggle{background:none;border:0;cursor:pointer;padding:8px 6px 8px 0;margin-left:-6px;margin-right:6px;color:var(--ink);font-size:.7rem}
.dd-toggle::after{content:"";display:block;width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);transition:transform .2s}
.dd-toggle[aria-expanded=true]::after{transform:rotate(-135deg)}
.dd{position:absolute;top:100%;left:0;min-width:300px;background:#fff;border:1px solid var(--line);border-top:2px solid var(--accent);list-style:none;margin:0;padding:8px 0;box-shadow:0 12px 28px rgba(0,0,0,.1);opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .2s,transform .2s,visibility .2s}
.dd a{display:block;padding:8px 20px;color:var(--ink);text-decoration:none;font-size:.9rem}
.dd a:hover{background:var(--tech);color:var(--accent)}
.dd li{margin:0}
@media (min-width:1181px){
 .has-dd:hover>.dd,.has-dd:focus-within>.dd,.has-dd.open>.dd{opacity:1;visibility:visible;transform:none}
}
.nav-cta{margin-left:8px}.nav-cta .btn{white-space:nowrap}.brand{flex-shrink:0}
.menu-btn{display:none;background:none;border:1px solid var(--line);padding:9px 11px;cursor:pointer}
.menu-btn span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;transition:transform .2s,opacity .2s}
.menu-btn[aria-expanded=true] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-btn[aria-expanded=true] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded=true] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* buttons */
.btn{display:inline-block;padding:13px 26px;border:2px solid var(--accent);background:var(--accent);color:#fff;font-weight:650;text-decoration:none;font-size:.95rem;letter-spacing:.02em;border-radius:2px;cursor:pointer;font-family:inherit;transition:background .2s,color .2s,transform .2s}
.btn:hover{background:var(--ink);border-color:var(--ink);color:#fff;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--accent)}
.btn.ghost:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.sm{padding:9px 18px;font-size:.88rem}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:1.6em}

/* hero / page header */
.hero{background:linear-gradient(180deg,#fff 0,var(--tech) 100%);border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;padding-top:72px;padding-bottom:72px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .img-frame{background:#fff;border:1px solid var(--line);padding:18px}
.hero-strip{background:var(--ink);color:#e8e8e8}
.hero-strip .wrap{display:flex;gap:10px 28px;flex-wrap:wrap;padding-top:14px;padding-bottom:14px;font-size:.85rem;letter-spacing:.04em}
.hero-strip b{color:#fff}
.page-head{background:var(--tech);border-bottom:1px solid var(--line)}
.page-head .wrap{padding-top:36px;padding-bottom:44px}
.page-head.has-img .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.page-head h1{font-size:clamp(1.8rem,3.6vw,2.6rem)}
.crumbs{font-size:.84rem;color:var(--muted);margin-bottom:22px}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:4px}
.crumbs li{margin:0}.crumbs li+li::before{content:"/";margin:0 8px;color:#aaa}
.crumbs a{color:var(--ink-2)}
.img-frame{background:#fff;border:1px solid var(--line);padding:14px;display:flex;align-items:center;justify-content:center}
.img-frame img{max-height:380px;width:auto;object-fit:contain;transition:transform .5s}
.img-frame:hover img{transform:scale(1.03)}
.img-frame{overflow:hidden}

/* sections */
section{padding:72px 0}
.alt{background:var(--tech);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:40px}
.cols-2{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cols-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);padding:0;display:flex;flex-direction:column;text-decoration:none;color:var(--ink);transition:border-color .2s,box-shadow .2s,transform .2s}
.card:hover{border-color:var(--accent);box-shadow:0 8px 22px rgba(0,0,0,.07);transform:translateY(-3px);color:var(--ink)}
.card .thumb{background:#fff;border-bottom:1px solid var(--line);height:190px;display:flex;align-items:center;justify-content:center;padding:12px;overflow:hidden}
.card .thumb img{max-height:100%;width:auto;object-fit:contain;transition:transform .4s}
.card:hover .thumb img{transform:scale(1.05)}
.card .body{padding:20px 22px 22px}
.card h3{margin-bottom:.4em}
.card p{font-size:.93rem;color:var(--ink-2);margin:0}
.card .more{display:inline-block;margin-top:12px;font-size:.85rem;font-weight:650;color:var(--accent)}
.card.plain .body{padding:24px}
.uns{font-size:1.5rem;font-weight:700;color:var(--accent);letter-spacing:-.01em;margin-bottom:.2em}
.tag{display:inline-block;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line);padding:2px 8px;margin:0 6px 6px 0;color:var(--ink-2);background:#fff}
.steps{counter-reset:s;list-style:none;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.steps li{counter-increment:s;border-top:3px solid var(--accent);padding-top:14px;margin:0}
.steps li::before{content:"0" counter(s);display:block;font-weight:700;color:var(--accent);font-size:.85rem;letter-spacing:.1em;margin-bottom:6px}
.steps h3{font-size:1.02rem;margin-bottom:.3em}.steps p{font-size:.9rem;color:var(--ink-2)}
.checks{list-style:none;padding:0}
.checks li{padding-left:26px;position:relative}
.checks li::before{content:"";position:absolute;left:2px;top:.62em;width:10px;height:6px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}
.note{border-left:3px solid var(--accent);background:var(--tech);padding:14px 18px;font-size:.92rem;color:var(--ink-2);margin:1.4em 0}
.alt .note{background:#fff}
.units{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.unit{border:1px solid var(--line);background:#fff;padding:24px;border-top:3px solid var(--accent)}
.unit h3{font-size:1rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent)}
.unit address{font-style:normal;color:var(--ink-2);font-size:.95rem}
.cta-band{background:var(--ink);color:#fff;text-align:center}
.cta-band h2{color:#fff}.cta-band p{color:#cfcfcf;max-width:60ch;margin-left:auto;margin-right:auto}
.cta-band .btn.ghost{color:#fff;border-color:#888}
.cta-band .btn-row{justify-content:center}
.link-list{list-style:none;padding:0;columns:2;column-gap:32px}
.link-list li{break-inside:avoid;border-bottom:1px solid var(--line);padding:8px 0;margin:0}
.link-list a{font-weight:600;text-decoration:none}
.link-list a:hover{text-decoration:underline}
.link-list small{display:block;color:var(--muted);font-weight:400}

/* tables */
.tbl-wrap{overflow-x:auto;margin:0 0 1.4em;border:1px solid var(--line);background:#fff}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{padding:11px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--ink);color:#fff;font-weight:600;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;border-bottom:0}
tbody th{background:var(--tech);width:30%;font-weight:650}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
caption{caption-side:top;text-align:left;font-weight:700;padding:0 0 10px;font-size:.95rem}
@media (max-width:640px){
 table.stack,table.stack tbody,table.stack tr,table.stack th,table.stack td{display:block;width:100%}
 table.stack thead{position:absolute;left:-9999px}
 table.stack tr{border-bottom:2px solid var(--line)}
 table.stack td[data-l]::before{content:attr(data-l);display:block;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:700}
 table.stack tbody th{width:100%;border-bottom:0}
}

/* form */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-grid .full{grid-column:1/-1}
label{display:block;font-weight:600;font-size:.88rem;margin-bottom:5px}
input,select,textarea{width:100%;padding:11px 13px;border:1px solid #bdbdbd;border-radius:2px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:2px solid var(--accent);outline-offset:0}
textarea{min-height:130px;resize:vertical}
.req{color:var(--accent)}
.form-status{margin-top:14px;font-size:.92rem}
.form-box{border:1px solid var(--line);padding:32px;background:#fff}
.contact-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:start}

/* footer */
.site-footer{background:#111;color:#bdbdbd;font-size:.92rem;padding:64px 0 0}
.site-footer a{color:#d6d6d6;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer .fh{color:#fff;font-size:.82rem;font-weight:650;letter-spacing:.14em;text-transform:uppercase;margin:0 0 1em}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr .8fr 1.2fr;gap:36px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.45em}
.foot-logo{background:#fff;padding:8px 12px;display:inline-block;margin-bottom:16px}
.foot-logo img{height:38px;width:auto}
.foot-bottom{border-top:1px solid #2a2a2a;margin-top:48px;padding:20px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.84rem}
.to-top{position:fixed;right:20px;bottom:20px;width:44px;height:44px;background:var(--accent);color:#fff;border:0;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s,background .2s;z-index:90;font-size:1.2rem}
.to-top.show{opacity:1;visibility:visible}.to-top:hover{background:var(--ink)}

/* certificates / lightbox */
.cert-gallery{display:grid;grid-template-columns:1fr;gap:24px}
.cert-card{display:grid;grid-template-columns:230px 1fr;gap:32px;background:#fff;border:1px solid var(--line);padding:22px;transition:border-color .2s,box-shadow .2s}
.cert-card:hover{border-color:var(--accent);box-shadow:0 8px 22px rgba(0,0,0,.07)}
.cert-thumb{display:block;border:1px solid var(--line);background:#fff;align-self:start;overflow:hidden}
.cert-thumb img{width:100%;height:auto;transition:transform .4s}.cert-thumb:hover img{transform:scale(1.04)}
.cert-body h3{margin-bottom:.15em}.cert-sub{color:var(--ink-2);margin:0 0 .3em;font-size:.95rem}.cert-issuer{font-size:.85rem;color:var(--muted);margin-bottom:.9em}
.cert-body table{font-size:.86rem}.cert-body th,.cert-body td{padding:7px 10px}.cert-body tbody th{width:34%}
.cert-actions{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;margin-top:6px}
.cert-verify{font-size:.84rem;font-weight:600}
.lb{position:fixed;inset:0;background:rgba(10,10,10,.92);display:none;align-items:center;justify-content:center;z-index:300;padding:64px 56px 24px}
.lb.open{display:flex}.lb>img{max-width:100%;max-height:100%;object-fit:contain;background:#fff;box-shadow:0 10px 40px rgba(0,0,0,.5)}
.lb-bar{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;gap:16px;padding:12px 18px;color:#fff}
.lb-title{flex:1;font-weight:650}.lb-pdf{color:#fff;font-size:.9rem;border:1px solid #888;padding:6px 12px;text-decoration:none}.lb-pdf:hover{background:#fff;color:#111}
.lb button{background:none;border:0;color:#fff;cursor:pointer}.lb-close{font-size:2.2rem;line-height:1;padding:0 6px}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);font-size:3rem;line-height:1;padding:8px 12px}.lb-prev{left:6px}.lb-next{right:6px}
.lb button:focus-visible,.lb a:focus-visible{outline-color:#fff}
@media (max-width:760px){.cert-card{grid-template-columns:1fr;padding:18px;gap:18px}.cert-thumb{max-width:240px}}
@media (max-width:640px){.lb{padding:60px 8px 12px}.lb-nav{font-size:2.2rem;padding:6px}}
/* form states */
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.help{font-size:.82rem;color:var(--muted);margin:5px 0 0}
.field-err{color:#a11d1d;font-size:.84rem;margin:5px 0 0;min-height:0}.field-err:empty{display:none}
input[aria-invalid=true],textarea[aria-invalid=true]{border-color:#a11d1d}
.form-summary{border-left:3px solid #a11d1d;background:#fbeeee;padding:12px 16px;margin-bottom:18px;color:#7a1414;font-size:.93rem}
.btn[disabled]{opacity:.6;cursor:wait;transform:none}
.ty-icon{margin-bottom:14px}

/* responsive */
@media (max-width:1100px){.foot-grid{grid-template-columns:1fr 1fr 1fr}.cols-4{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:1180px){
 .menu-btn{display:block}
 .nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .3s}
 .nav.open{max-height:calc(100vh - var(--hdr));overflow-y:auto}
 .nav-list{flex-direction:column;align-items:stretch;padding:8px 24px 20px}
 .nav-list>li{flex-wrap:wrap;border-bottom:1px solid var(--line)}
 .nav-list a.nl{flex:1;padding:14px 0;border-bottom:0}
 .dd-toggle{padding:14px 8px}
 .dd{position:static;flex-basis:100%;min-width:0;border:0;box-shadow:none;padding:0 0 8px 14px;opacity:1;visibility:visible;transform:none;display:none}
 .has-dd.open>.dd{display:block}
 .nav-cta{margin:14px 0 0}.nav-cta .btn{width:100%;text-align:center}
}
@media (max-width:980px){
 .hero .wrap,.page-head.has-img .wrap,.cols-2,.contact-grid{grid-template-columns:1fr;gap:32px}
 .hero .wrap{padding-top:44px;padding-bottom:44px}
 .cols-3,.units{grid-template-columns:1fr 1fr}
}

@media (max-width:640px){
 section{padding:52px 0}
 .cols-3,.cols-4,.units,.steps,.form-grid,.foot-grid{grid-template-columns:1fr}
 .link-list{columns:1}
 .topbar .wrap>span:first-child{display:none}.topbar .wrap{justify-content:center;text-align:center}.topbar .tb-sep{margin-left:12px}
 .form-box{padding:20px}
 .brand img{height:38px}
}

/* FAQ + mobile polish */
.faq h3{font-size:1.05rem;margin:1.4em 0 .3em}.faq h3:first-child{margin-top:0}.faq p{max-width:78ch;color:var(--ink-2)}
@media (max-width:1180px){
 .nav-list a.nl{min-height:48px;display:flex;align-items:center}
 .dd a{padding:12px 6px;min-height:44px;display:flex;align-items:center}
 .dd-toggle{min-width:48px;min-height:48px;display:flex;align-items:center;justify-content:center;padding:0}
 .menu-btn{min-width:48px;min-height:48px}
}
@media (max-width:640px){
 body{font-size:16px}
 h1{font-size:clamp(1.65rem,7.2vw,2.1rem)}
 .btn{width:100%;text-align:center;padding:14px 18px}
 .btn.sm{width:auto}.cert-actions .btn{flex:1 1 auto;text-align:center}
 .btn-row{gap:10px}
 .hero-strip .wrap{gap:6px 16px;font-size:.8rem}
 .page-head .wrap{padding-top:24px;padding-bottom:32px}
 .img-frame img{max-height:260px}
 .site-footer{padding-top:44px}.foot-bottom{flex-direction:column;text-align:center}
 .to-top{right:14px;bottom:14px}
 .tbl-wrap{margin-left:-2px;margin-right:-2px}
 .crumbs{font-size:.8rem;margin-bottom:14px}
 .sec-head{margin-bottom:28px}
}
@media (max-width:360px){.wrap{padding:0 16px}.brand img{height:34px}.topbar{font-size:.76rem}}