@font-face{font-family:'Vazirmatn';font-weight:400;font-style:normal;font-display:swap;src:url(Vazirmatn-400.woff) format('woff')}
@font-face{font-family:'Vazirmatn';font-weight:500;font-style:normal;font-display:swap;src:url(Vazirmatn-500.woff) format('woff')}
@font-face{font-family:'Vazirmatn';font-weight:700;font-style:normal;font-display:swap;src:url(Vazirmatn-700.woff) format('woff')}
@font-face{font-family:'Poppins';font-weight:400;font-style:normal;font-display:swap;src:url(Poppins-400.woff) format('woff')}
@font-face{font-family:'Poppins';font-weight:500;font-style:normal;font-display:swap;src:url(Poppins-500.woff) format('woff')}

/* Layout: sticky bar, photo hero, track-record strip, three business lines (alternating photo/spec), markets, trust, contact. Palette taken from the EAF logo blue plus a copper accent. */
:root{--bg:#F7F9FA;--surface:#FFFFFF;--ink:#1A2330;--muted:#5B6877;--line:#DCE3E9;--blue:#3E6A90;--copper:#B5692E;--tint:#EAF0F5;--warm:#FBF1E6;--dark:#1A2330;--dark2:#223244;--onDark:#F2F5F7;--hi:#E2A084;
--f-latin:'Poppins',system-ui,sans-serif;--f-fa:'Vazirmatn','Poppins',system-ui,sans-serif}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#10171F;--surface:#18212B;--ink:#E8EDF2;--muted:#9AA8B6;--line:#2A3745;--blue:#7FA6C9;--copper:#E0955A;--tint:#1B2733;--warm:#2A2118;--dark:#0B1118;--dark2:#162230;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#10171F;--surface:#18212B;--ink:#E8EDF2;--muted:#9AA8B6;--line:#2A3745;--blue:#7FA6C9;--copper:#E0955A;--tint:#1B2733;--warm:#2A2118;--dark:#0B1118;--dark2:#162230;color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--bg);color:var(--ink);font:400 16px/1.65 var(--f-latin);-webkit-font-smoothing:antialiased}
html[lang="fa"] body{font-family:var(--f-fa);line-height:1.9}
.w{max-width:1160px;margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
a{color:inherit}
h1,h2,h3{line-height:1.2;text-wrap:balance;margin:0;font-weight:500}
html[lang="fa"] h1,html[lang="fa"] h2,html[lang="fa"] h3{line-height:1.5;font-weight:700}
p{margin:0}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--copper);font-weight:500}
html[lang="fa"] .eyebrow{letter-spacing:0;font-size:13px}
/* header */
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--surface);border-bottom:1px solid var(--line)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--surface)}
.bar{display:flex;align-items:center;gap:20px;min-height:64px;flex-wrap:wrap;padding-block:8px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;direction:ltr}
.brand img{height:30px;width:auto;display:block}
.brand small{font-size:10px;letter-spacing:.2em;color:var(--muted);font-weight:500;border-left:1px solid var(--line);padding-left:12px;line-height:1.2}
nav{display:flex;gap:22px;margin-inline-start:auto;font-size:14px;flex-wrap:wrap}
nav a{text-decoration:none;color:var(--muted)}
nav a:hover{color:var(--ink)}
.tools{display:flex;gap:8px}
.btn{font:inherit;font-size:13px;border:1px solid var(--line);background:transparent;color:var(--ink);padding:7px 14px;cursor:pointer;border-radius:2px}
.btn:hover{border-color:var(--blue);color:var(--blue)}
.btn.pri{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.pri:hover{background:var(--ink);border-color:var(--ink);color:var(--bg)}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px}
@media(max-width:760px){nav{display:none}.tools{margin-inline-start:auto}}
/* hero */
.hero{position:relative;color:#fff;background:#1A2330 url(hero.webp) center 62%/cover}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,22,32,.88) 0%,rgba(14,22,32,.62) 55%,rgba(14,22,32,.25) 100%)}
html[dir="rtl"] .hero::before{background:linear-gradient(270deg,rgba(14,22,32,.88) 0%,rgba(14,22,32,.62) 55%,rgba(14,22,32,.25) 100%)}
.hero .w{position:relative;padding-block:clamp(64px,11vw,140px)}
.hero h1{font-size:clamp(32px,5.2vw,58px);max-width:15em;font-weight:500;margin-block:14px 20px}
html[lang="fa"] .hero h1{font-weight:700;line-height:1.45}
.hero p.lead{max-width:36em;font-size:clamp(16px,1.6vw,19px);color:#E3EAF0;margin-bottom:30px}
.hero .eyebrow{color:var(--hi)}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.cta .btn{padding:12px 24px;font-size:14px;border-color:rgba(255,255,255,.5);color:#fff;text-decoration:none}
.cta .btn.pri{background:var(--copper);border-color:var(--copper)}
.cta .btn:hover{background:#fff;color:var(--ink);border-color:#fff}
/* numbers */
.rec{background:var(--warm);border-bottom:1px solid var(--line)}
.rec .w{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.rec .c{padding:28px 22px;border-inline-start:1px solid var(--line)}
.rec .c:first-child{border-inline-start:0;padding-inline-start:0}
.rec b{display:block;font-size:clamp(26px,3.4vw,40px);font-weight:500;color:var(--copper);line-height:1.1;direction:ltr;unicode-bidi:isolate}
html[dir="rtl"] .rec b{text-align:right}
.rec span{display:block;margin-top:8px;font-size:14px;color:var(--muted);line-height:1.5}
@media(max-width:820px){.rec .w{grid-template-columns:1fr 1fr}.rec .c:nth-child(3){border-inline-start:0;padding-inline-start:0}.rec .c{border-top:1px solid var(--line)}.rec .c:nth-child(-n+2){border-top:0}}
/* sections */
section{padding-block:clamp(56px,8vw,104px)}
.sh{max-width:44em;margin-bottom:clamp(32px,5vw,56px)}
.sh h2{font-size:clamp(26px,3.4vw,40px);margin-block:10px 14px}
.sh p{color:var(--muted)}
.line{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:center;padding-block:clamp(28px,4vw,48px);border-top:1px solid var(--line)}
.line:first-of-type{border-top:0}
.line.flip .ph{order:2}
.ph{margin:0;position:relative;overflow:hidden;background:var(--tint)}
.ph img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.ph.noph{aspect-ratio:4/3;display:grid;place-items:center;padding:28px;background:linear-gradient(135deg,var(--dark),var(--dark2));color:var(--onDark)}
.ph.noph div{font-size:clamp(20px,2.6vw,28px);line-height:1.35;font-weight:500}
.ph.noph small{display:block;margin-top:12px;font-size:13px;color:var(--hi);letter-spacing:.1em;text-transform:uppercase}
html[lang="fa"] .ph.noph small{letter-spacing:0}
.tx h3{font-size:clamp(22px,2.6vw,30px);margin-block:8px 12px}
.tx>p{color:var(--muted);margin-bottom:18px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.chip{font-size:13px;padding:4px 12px;border:1px solid var(--line);background:var(--surface);border-radius:2px}
.spec{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
.spec caption{caption-side:top;text-align:start;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding-bottom:6px}
html[lang="fa"] .spec caption{letter-spacing:0;font-size:13px}
.spec th,.spec td{text-align:start;padding:7px 0;border-bottom:1px solid var(--line);font-weight:400}
.spec td{font-weight:500;direction:ltr;unicode-bidi:isolate;text-align:end}
.sp{overflow-x:auto}
.note{font-size:13px;color:var(--muted);margin-top:10px}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.tab{font:inherit;font-size:13px;padding:6px 14px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;border-radius:2px}
.tab[aria-selected="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
@media(max-width:820px){.line{grid-template-columns:1fr}.line.flip .ph{order:0}}
.alt{background:var(--tint)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line);padding:26px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
@media(max-width:820px){.grid3{grid-template-columns:1fr}}
.mk{display:flex;flex-wrap:wrap;gap:10px}
.mk span{padding:10px 20px;background:var(--surface);border:1px solid var(--line);font-weight:500}
.dark{background:linear-gradient(135deg,var(--dark),var(--dark2));color:var(--onDark)}
.dark .sh p{color:#B9C6D2}
.dark .eyebrow{color:var(--hi)}
.cg{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px)}
@media(max-width:820px){.cg{grid-template-columns:1fr}}
.office h3{font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--hi);margin-bottom:10px;font-weight:500}
html[lang="fa"] .office h3{letter-spacing:0;font-size:16px}
.office p{color:#DCE5EC;margin-bottom:6px}
.ltr{direction:ltr;unicode-bidi:isolate;display:inline-block}
.dark a{color:#fff}
form{background:var(--surface);color:var(--ink);padding:26px;display:grid;gap:14px}
label{font-size:13px;color:var(--muted);display:grid;gap:5px}
input,select,textarea{font:inherit;font-size:15px;padding:10px 12px;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:2px;width:100%;min-width:0}
textarea{min-height:84px;resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:480px){.row2{grid-template-columns:1fr}}
.out{font-size:13px;color:var(--muted);min-height:1.4em}
footer{background:var(--dark);color:#9AA8B6;font-size:13px;padding-block:28px}
footer .w{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.wa{position:fixed;inset-inline-end:max(16px,env(safe-area-inset-right,0px));bottom:max(16px,env(safe-area-inset-bottom,0px));width:56px;height:56px;border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(0,0,0,.3);z-index:50}.wa svg{width:30px;height:30px;fill:#fff}.fbtns{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}.dl a{display:inline-block;margin:2px 14px 2px 0;text-decoration:underline}[dir=rtl] .dl a{margin:2px 0 2px 14px}#hc{background:#3E6A90;border-color:#3E6A90;color:#fff;display:inline-flex;align-items:center;justify-content:center;padding:7px 10px}#hc:hover{background:#B5692E;border-color:#B5692E;color:#fff}#hc{font-size:12px;white-space:nowrap;padding:7px 10px;text-decoration:none}
body{margin:0}img{max-width:100%;height:auto}[hidden]{display:none!important}
a.btn{text-decoration:none;display:inline-block}
a#hc{display:inline-flex}
.alt{background:var(--tint)}
/* product pages */
.phero{background:linear-gradient(135deg,var(--dark),var(--dark2));color:var(--onDark)}
.phero .w{padding-block:clamp(36px,6vw,76px)}
.phero h1{font-size:clamp(30px,4.4vw,48px);margin-block:10px 16px;font-weight:500}
html[lang="fa"] .phero h1{font-weight:700;line-height:1.5}
.phero .lead{max-width:42em;color:#C9D5DF;margin-bottom:26px}
.phero .eyebrow{color:var(--hi)}
.phero .cta .btn{padding:11px 22px;font-size:14px}
.crumb{font-size:13px;color:#9AA8B6;margin-bottom:16px}
.crumb a{text-decoration:none;color:#C9D5DF}
.crumb a:hover{color:#fff}
.tx>p:first-child{color:var(--muted);margin-bottom:18px}
.need{margin-top:clamp(28px,4vw,48px);padding:clamp(20px,3vw,32px);background:var(--surface);border:1px solid var(--line)}
.need h2{font-size:clamp(18px,2.2vw,24px);margin-bottom:12px}
.need ul{margin:0;padding-inline-start:1.2em;color:var(--muted)}
.need li{margin-bottom:4px}
/* product cards */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.pgrid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.pgrid{grid-template-columns:1fr}}
.pc{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);text-decoration:none;color:var(--ink);overflow:hidden}
.pc:hover{border-color:var(--blue)}
.pc img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.pc .noimg{aspect-ratio:4/3;display:grid;place-items:center;padding:20px;background:linear-gradient(135deg,var(--dark),var(--dark2));color:var(--onDark);font-size:clamp(18px,2.2vw,24px);line-height:1.35;font-weight:500}
.pc .noimg span{font-size:.7em;color:var(--hi);font-weight:400}
.pc .pt{padding:18px 20px 22px;display:flex;flex-direction:column;gap:6px;flex:1}
.pc h3{font-size:18px}
.pc p{color:var(--muted);font-size:14px}
.pc .more{margin-top:auto;padding-top:8px;color:var(--blue);font-size:14px;font-weight:500}
html[dir="rtl"] .pc .more{direction:rtl}
.ph.noph span{font-size:.75em}
/* refractories */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:clamp(24px,4vw,40px);background:var(--warm);border:1px solid var(--line)}
.fact{padding:22px;border-inline-start:1px solid var(--line)}
.fact:first-child{border-inline-start:0}
.fact b{display:block;font-size:clamp(22px,2.6vw,30px);font-weight:500;color:var(--copper);line-height:1.15;direction:ltr;unicode-bidi:isolate}
html[dir="rtl"] .fact b{text-align:right}
.fact span{display:block;margin-top:6px;font-size:14px;color:var(--muted);line-height:1.5}
@media(max-width:820px){.facts{grid-template-columns:1fr 1fr}.fact:nth-child(3){border-inline-start:0}.fact{border-top:1px solid var(--line)}.fact:nth-child(-n+2){border-top:0}}
.tsec{margin-top:clamp(32px,5vw,56px);margin-bottom:18px}
.tsec h2{font-size:clamp(22px,2.8vw,30px);margin-block:0 8px}
.sp{overflow-x:auto;border:1px solid var(--line);background:var(--surface)}
.dt{width:100%;min-width:860px;border-collapse:collapse;font-size:13px;line-height:1.45}
.dt th,.dt td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:start;vertical-align:top;font-weight:400}
.dt thead th{background:var(--tint);font-weight:500;font-size:12px;position:sticky;top:0}
.dt tbody th[scope=row]{font-weight:500;white-space:nowrap}
.dt .zr th{background:var(--dark);color:var(--onDark);font-weight:500;font-size:13px;letter-spacing:.02em}
.dt td.n{direction:ltr;unicode-bidi:isolate;text-align:center;white-space:nowrap;font-variant-numeric:tabular-nums}
html[dir="rtl"] .dt td.n{text-align:center}
.apps{color:var(--muted);margin-top:8px}
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gal figure{margin:0;background:var(--surface);border:1px solid var(--line)}
.gal img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.gal figcaption{padding:10px 14px;font-size:13px;color:var(--muted)}
@media(max-width:820px){.gal{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.gal{grid-template-columns:1fr}}
.ph.wide img,.pc.wide img{aspect-ratio:16/9;object-position:30% 50%}
.zone{margin:clamp(24px,4vw,40px) 0 0}
.zone img{display:block;width:100%;height:auto;border:1px solid var(--line)}
.zone figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.dl{margin-top:16px}
footer .soc{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
footer .soc a{display:inline-flex;align-items:center;gap:6px;color:#C9D3DC;text-decoration:none;border:1px solid rgba(255,255,255,.22);border-radius:8px;padding:7px 10px;line-height:1}
footer .soc a:hover{color:#fff;border-color:#fff}
footer .soc svg{width:18px;height:18px;fill:currentColor;flex:none}
footer .soc b{font-weight:600;font-size:12px}
footer .soc .sep{margin-inline-start:6px}
footer{padding-bottom:84px}
footer .soc{direction:ltr}
footer .soc a.li svg,footer .soc a.tg svg{fill:#fff;width:20px;height:20px;padding:3px;box-sizing:content-box;border-radius:6px}
footer .soc a.li svg{background:#0A66C2}
footer .soc a.tg svg{background:#27A7E7}
footer .soc a.em svg{fill:#fff;width:20px;height:20px;padding:3px;box-sizing:content-box;border-radius:6px;background:linear-gradient(180deg,#6DB8F7,#2F6FEB)}
footer .soc{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%;max-width:400px}
footer .soc a{justify-content:flex-start;padding:9px 12px}
footer .soc a.em{grid-column:1/-1}