/* steel-screens.uk — "seen through a steel screen" identity
   ink #1d2127 · gunmetal #353d47 · slate #4a5868 · mist #c9ced4 · paper #f6f6f4 · lamp #c98a3d */
@font-face{font-family:"Marcellus";src:url(/assets/fonts/marcellus.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Instrument Sans";src:url(/assets/fonts/instrument-sans.woff2) format("woff2");font-weight:400 700;font-style:normal;font-display:swap}
:root{--ink:#1d2127;--gun:#353d47;--slate:#4a5868;--mist:#c9ced4;--fog:#e6e8eb;--paper:#f6f6f4;--white:#fff;--lamp:#c98a3d;--lamp-ink:#7a4c14;--ok:#2f6b4f;--err:#a3332b;
--display:"Marcellus","Iowan Old Style","Palatino Linotype",Georgia,serif;--sans:"Instrument Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
--bar:10px;--wrap:1180px;--r:2px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:96px}
body{margin:0;font-family:var(--sans);font-size:1.0625rem;line-height:1.6;color:var(--ink);background:var(--white);font-feature-settings:"kern","lnum"}
img{max-width:100%;height:auto;display:block}
a{color:var(--slate);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--lamp);outline-offset:2px}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.15;font-weight:400}
h1,h2{font-family:var(--display);letter-spacing:.005em}
h1{font-size:clamp(2.15rem,1.4rem + 3.2vw,3.7rem)}
h2{font-size:clamp(1.7rem,1.25rem + 1.7vw,2.45rem)}
h3{font-family:var(--sans);font-weight:600;font-size:1.18rem;line-height:1.3}
p{margin:0 0 1em}
ul{padding-left:1.15em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.prose{max-width:68ch}
.prose p,.prose li{font-size:1.06rem}
.skip{position:absolute;left:-9999px;top:0;background:var(--lamp);color:var(--ink);padding:10px 14px;z-index:100}
.skip:focus{left:10px;top:10px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--slate)}
.small{font-size:.9rem}

/* buttons */
.btn{white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:48px;padding:.7em 1.3em;border:2px solid transparent;border-radius:var(--r);font:600 1rem/1.2 var(--sans);text-decoration:none;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn-lamp{background:var(--lamp);color:var(--ink)}
.btn-lamp:hover{background:#d89a4f;color:var(--ink)}
.btn-ink{background:var(--ink);color:var(--paper)}
.btn-ink:hover{background:var(--gun);color:var(--white)}
.btn-line{border-color:currentColor;color:var(--ink);background:transparent}
.btn-line:hover{background:var(--ink);color:var(--paper)}
.on-ink .btn-line{color:var(--paper)}
.on-ink .btn-line:hover{background:var(--paper);color:var(--ink)}
.btn svg{width:18px;height:18px;flex:none}

/* header */
.site-head{position:sticky;top:0;z-index:40;background:var(--white);border-bottom:1px solid var(--fog)}
.head-row{display:flex;align-items:center;gap:18px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex:none}
.brand img{width:86px;height:56px}
.brand .wm{font-family:var(--display);font-size:1.45rem;line-height:1;letter-spacing:.02em;color:var(--ink)}
.brand .wm span{color:var(--slate)}
.brand .wm small{font-family:var(--sans);font-size:.72rem;letter-spacing:.02em;color:var(--slate);margin-left:2px}
.mainnav{margin-left:auto}
.mainnav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.mainnav a{display:block;white-space:nowrap;padding:10px 9px;color:var(--ink);text-decoration:none;font-weight:500;font-size:.98rem}
.mainnav a:hover,.mainnav a[aria-current=page]{color:var(--slate);text-decoration:underline}
.head-cta{display:flex;align-items:center;gap:10px}
.tel{font-weight:600;color:var(--ink);text-decoration:none;white-space:nowrap}
.tel:hover{color:var(--slate)}
.navtoggle{display:none;margin-left:auto;background:none;border:2px solid var(--ink);border-radius:var(--r);width:48px;height:44px;cursor:pointer}
.navtoggle span{display:block;width:20px;height:2px;background:var(--ink);margin:4px auto}
.catstrip{background:var(--paper);border-bottom:1px solid var(--fog)}
.catstrip ul{list-style:none;margin:0 auto;padding:0 20px;max-width:var(--wrap);display:flex;gap:2px;overflow-x:auto;scrollbar-width:thin;-webkit-overflow-scrolling:touch}
.catstrip a{display:block;white-space:nowrap;padding:9px 12px;font-size:.9rem;color:var(--gun);text-decoration:none}
.catstrip a:hover,.catstrip a[aria-current=page]{color:var(--ink);box-shadow:inset 0 -3px 0 var(--lamp)}
@media (max-width:1180px){.head-cta .tel{display:none}}
@media (max-width:900px){
 .navtoggle{display:block}
 .mainnav{position:absolute;left:0;right:0;top:100%;background:var(--white);border-bottom:1px solid var(--fog);display:none;margin:0}
 .mainnav.open{display:block}
 .mainnav ul{flex-direction:column;padding:8px 20px 16px}
 .mainnav a{padding:12px 0;border-bottom:1px solid var(--fog)}
 .head-cta{display:none}
 .brand .wm{font-size:1.25rem}
 .brand img{width:70px;height:46px}
}

/* the signature: a photo seen through a steel screen */
.screen{position:relative;margin:0;background:var(--ink);overflow:hidden}
.screen img{width:100%;height:100%;object-fit:cover}
.screen .bars{position:absolute;inset:0;display:grid;grid-template-columns:repeat(var(--c,5),1fr);grid-template-rows:38% 1fr;border:6px solid var(--ink);pointer-events:none}
.screen .bars span{box-shadow:inset 0 0 0 5px var(--ink),inset 0 0 0 6px rgba(255,255,255,.07)}
.screen.r3 .bars{grid-template-rows:repeat(3,1fr)}
.screen.c3{--c:3}.screen.c4{--c:4}
@media (max-width:640px){.screen .bars{--c:3!important;border-width:4px}.screen .bars span{box-shadow:inset 0 0 0 3px var(--ink)}.screen .bars span:nth-child(n+7){display:none}}

/* hero */
.hero{background:var(--ink);color:var(--paper);padding:48px 0 0}
.hero h1{color:var(--white);max-width:16ch}
.hero .lede{font-size:1.17rem;color:var(--mist);max-width:54ch}
.hero-top{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px;align-items:start;padding-bottom:40px}
.ticks{list-style:none;padding:0;margin:0 0 26px;display:grid;gap:8px}
.ticks li{position:relative;padding-left:28px;color:var(--paper)}
.ticks li::before{content:"";position:absolute;left:2px;top:.42em;width:14px;height:7px;border:solid var(--lamp);border-width:0 0 2.5px 2.5px;transform:rotate(-45deg)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.hero .screen{aspect-ratio:21/8}
@media (max-width:900px){.hero-top{grid-template-columns:1fr;gap:28px}.hero .screen{aspect-ratio:16/10}}

/* cards / forms */
.card{background:var(--white);color:var(--ink);border-radius:var(--r);padding:26px;box-shadow:0 0 0 1px var(--fog)}
.hero .card{box-shadow:none;border-top:6px solid var(--lamp)}
.card h2,.card .h{font-family:var(--display);font-size:1.6rem;margin-bottom:.25em}
.lead-form{display:grid;gap:12px}
.lead-form .row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:4px}
.field input,.field select,.field textarea{width:100%;min-height:46px;padding:10px 12px;border:1.5px solid #9aa3ad;border-radius:var(--r);font:inherit;font-size:1rem;background:var(--white);color:var(--ink)}
.field textarea{min-height:92px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--ink);outline:2px solid var(--lamp);outline-offset:0}
.field.bad input,.field.bad select,.field.bad textarea{border-color:var(--err)}
.err-msg{color:var(--err);font-size:.86rem;margin-top:3px;display:none}
.field.bad .err-msg{display:block}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:.88rem;color:var(--gun)}
.consent input{width:20px;height:20px;margin-top:2px;flex:none}
.hp{position:absolute!important;left:-5000px!important;width:1px;height:1px;opacity:0}
.form-status{font-size:.95rem;min-height:1.2em}
.form-status.err{color:var(--err)}
@media (max-width:480px){.lead-form .row2{grid-template-columns:1fr}}

/* sections */
section{padding:72px 0}
.band-paper{background:var(--paper)}
.band-ink{background:var(--ink);color:var(--paper)}
.band-ink h2,.band-ink h3{color:var(--white)}
.band-ink a{color:var(--mist)}
.sec-head{max-width:60ch;margin-bottom:34px}
.sec-head p{color:var(--slate);font-size:1.08rem}
.band-ink .sec-head p{color:var(--mist)}
@media (max-width:640px){section{padding:52px 0}}

/* trust strip */
.trust{background:var(--paper);border-bottom:1px solid var(--fog);padding:0}
.trust ul{list-style:none;margin:0;padding:18px 0;display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.trust li{display:flex;align-items:center;gap:10px;font-weight:600;font-size:.95rem}
.trust svg{width:28px;height:28px;flex:none;color:var(--slate)}
@media (max-width:900px){.trust ul{grid-template-columns:repeat(2,1fr)}}

/* USP */
.usp{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:var(--bar) solid var(--ink)}
.usp > div{padding:26px 24px 8px;border-right:var(--bar) solid var(--ink)}
.usp > div:last-child{border-right:0}
.usp svg{width:34px;height:34px;color:var(--slate);margin-bottom:10px}
.usp p{color:var(--gun);font-size:.98rem}
@media (max-width:900px){.usp{grid-template-columns:1fr 1fr}.usp > div:nth-child(2){border-right:0}.usp > div:nth-child(n+3){border-top:var(--bar) solid var(--ink)}}
@media (max-width:560px){.usp{grid-template-columns:1fr}.usp > div{border-right:0!important;border-top:var(--bar) solid var(--ink)}.usp > div:first-child{border-top:0}}

/* catalogue */
.cat{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.6fr);gap:40px;margin-bottom:64px;align-items:start}
.cat:last-child{margin-bottom:0}
.cat .screen{aspect-ratio:4/3}
.cat-intro h3{font-family:var(--display);font-size:1.9rem;font-weight:400}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:0;padding:1px 0 0 1px}
.tile{background:var(--white);border:1px solid var(--fog);margin:-1px 0 0 -1px;padding:18px 18px 16px;display:flex;flex-direction:column;gap:6px;text-decoration:none;color:var(--ink)}
.tile:hover{background:var(--paper)}
.tile svg{width:100%;height:auto;max-height:118px;margin-bottom:6px}
.tile strong{font-size:1.04rem}
.tile span{font-size:.92rem;color:var(--gun);flex:1}
.tile em{font-style:normal;font-weight:600;color:var(--slate);font-size:.92rem;text-decoration:underline;text-underline-offset:3px}
@media (max-width:900px){.cat{grid-template-columns:1fr;gap:22px}.cat .screen{aspect-ratio:16/10}}

/* elevation drawing */
.elev{color:var(--ink)}
.elev .dim{stroke:var(--slate);stroke-width:1}
.elev text{font:500 9px var(--sans);fill:var(--slate)}

/* reviews */
.reviews{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
.reviews .note{border-left:var(--bar) solid var(--lamp);padding:6px 0 6px 22px}
@media (max-width:800px){.reviews{grid-template-columns:1fr}}

/* steps (a real sequence, so numbered) */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s}
.steps li{counter-increment:s;border-top:4px solid var(--ink);padding-top:14px}
.steps li::before{content:counter(s);display:block;font-family:var(--display);font-size:2.2rem;line-height:1;color:var(--slate);margin-bottom:8px}
.steps p{color:var(--gun);font-size:.98rem}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* FAQ */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--mist)}
.faq summary{list-style:none;cursor:pointer;padding:18px 40px 18px 0;font-weight:600;font-size:1.06rem;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;border:2px solid var(--ink);border-width:0 2px 2px 0;transform:translateY(-70%) rotate(45deg);transition:transform .2s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq details > div{padding:0 0 18px;color:var(--gun)}
.band-ink .faq summary::after{border-color:var(--paper)}

/* chips */
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips a{display:inline-block;padding:7px 12px;border:1.5px solid var(--mist);border-radius:var(--r);text-decoration:none;color:var(--ink);font-size:.93rem;background:var(--white)}
.chips a:hover{border-color:var(--ink)}
.chips .on a{border-color:var(--ink);font-weight:600}

/* CTA band */
.cta-band{background:var(--ink);color:var(--paper);padding:56px 0;border-top:var(--bar) solid var(--gun)}
.cta-band .wrap{display:flex;gap:30px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band h2{color:var(--white);margin:0;max-width:22ch}

/* page heads */
.crumbs{font-size:.88rem;padding:14px 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li:not(:last-child)::after{content:"/";margin-left:6px;color:var(--mist)}
.crumbs a{color:var(--slate)}
.page-hero{padding:26px 0 56px;border-bottom:1px solid var(--fog)}
.ph-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:44px;align-items:start}
.page-hero .def{font-size:1.15rem;color:var(--gun);max-width:60ch}
.page-hero .screen{aspect-ratio:4/3}
.price-chip{display:inline-flex;flex-direction:column;border-left:var(--bar) solid var(--ink);padding:4px 0 4px 16px;margin:6px 0 22px}
.price-chip b{font-family:var(--display);font-weight:400;font-size:1.7rem;line-height:1.1}
.price-chip span{font-size:.9rem;color:var(--slate)}
@media (max-width:900px){.ph-grid{grid-template-columns:1fr;gap:26px}}

.two{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:48px;align-items:start}
@media (max-width:900px){.two{grid-template-columns:1fr}}
.spec{list-style:none;padding:0;margin:0}
.spec li{padding:11px 0 11px 26px;border-bottom:1px solid var(--fog);position:relative}
.spec li::before{content:"";position:absolute;left:0;top:1.05em;width:12px;height:2px;background:var(--lamp)}
.aside-box{border:2px solid var(--ink);padding:22px;background:var(--white)}
.aside-box h3{margin-bottom:.3em}
.aside-box .big{font-family:var(--display);font-size:2rem;line-height:1.1;margin:.2em 0}
.svgbox{background:var(--paper);padding:18px;margin-bottom:22px}
.svgbox svg{width:100%;height:auto}
.links-cols{columns:3 220px;column-gap:28px}
.links-cols li{break-inside:avoid;margin-bottom:6px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media (max-width:860px){.grid3{grid-template-columns:1fr}}
.post-card{display:block;text-decoration:none;color:var(--ink);border-top:4px solid var(--ink);padding-top:14px}
.post-card h3{font-family:var(--display);font-weight:400;font-size:1.4rem}
.post-card p{color:var(--gun);font-size:.97rem}
table.prices{width:100%;border-collapse:collapse;margin:8px 0 18px;font-size:.98rem}
table.prices th,table.prices td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--fog);vertical-align:top}
table.prices th{font-weight:600;border-bottom:2px solid var(--ink)}
.tablewrap{overflow-x:auto}
dl.gloss dt{font-weight:600;margin-top:18px}
dl.gloss dd{margin:4px 0 0;color:var(--gun);max-width:68ch}

/* footer */
.site-foot{background:#15181c;color:var(--mist);padding:60px 0 120px;font-size:.95rem}
.site-foot a{color:var(--paper);text-decoration:none}
.site-foot a:hover{text-decoration:underline}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:28px}
.foot-grid h2{font-family:var(--sans);font-size:.95rem;font-weight:600;color:var(--white);margin-bottom:10px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin-bottom:7px}
.foot-brand img{width:132px;height:auto;background:#fff;padding:6px;margin-bottom:14px}
.nap{font-style:normal;line-height:1.6;margin-top:14px}
.ps-badge{display:inline-flex;align-items:center;gap:10px;margin-top:14px;padding:9px 12px;border:1px solid var(--gun);border-radius:var(--r);color:var(--paper)!important;font-size:.88rem}
.ps-badge svg{width:18px;height:18px}
.legal{border-top:1px solid var(--gun);margin-top:40px;padding-top:22px;font-size:.84rem;color:#a9b0b8;display:grid;gap:8px}
.legal a{color:var(--mist)}
@media (max-width:980px){.foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}}

/* mobile bar, whatsapp, cookie */
.mbar{position:fixed;left:0;right:0;bottom:0;z-index:50;display:none;grid-template-columns:1fr 1fr;background:var(--ink);border-top:3px solid var(--lamp)}
.mbar a{display:flex;align-items:center;justify-content:center;gap:8px;min-height:56px;color:var(--white);font-weight:600;text-decoration:none}
.mbar a + a{background:var(--lamp);color:var(--ink)}
.mbar svg{width:20px;height:20px}
@media (max-width:720px){.mbar{display:grid}.site-foot{padding-bottom:150px}}
.wa{position:fixed;left:18px;bottom:22px;z-index:45;width:54px;height:54px;border-radius:50%;background:#1f7a4d;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.25)}
.wa svg{width:28px;height:28px;color:#fff}
@media (max-width:720px){.wa{bottom:72px;left:12px;width:50px;height:50px}}
.cookie{position:fixed;left:16px;right:16px;bottom:16px;z-index:60;max-width:560px;background:var(--white);color:var(--ink);border:2px solid var(--ink);padding:18px;box-shadow:0 6px 24px rgba(0,0,0,.18)}
.cookie p{font-size:.92rem;margin-bottom:12px}
.cookie .cta-row .btn{min-height:42px;padding:.5em 1em}
@media (max-width:720px){.cookie{bottom:70px}}

/* quote tool */
.qt{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:36px;align-items:start}
.qt-progress{font-size:.92rem;color:var(--slate);margin-bottom:8px}
.qt-bar{height:6px;background:var(--fog);margin-bottom:22px}
.qt-bar i{display:block;height:100%;background:var(--lamp);width:25%;transition:width .25s}
.qt fieldset{border:0;padding:0;margin:0 0 18px}
.qt legend{font-weight:600;font-size:1.05rem;margin-bottom:10px}
.opts{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.opts label{display:flex;align-items:center;gap:8px;padding:12px;border:1.5px solid var(--mist);border-radius:var(--r);cursor:pointer;font-size:.95rem;background:var(--white)}
.opts input{accent-color:var(--ink)}
.opts label:has(input:checked){border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink);background:var(--paper)}
.qt-step[hidden]{display:none}
.qt-nav{display:flex;gap:10px;justify-content:space-between;margin-top:12px}
.qt-side{position:sticky;top:110px}
.qt-preview{background:var(--paper);padding:16px;margin-bottom:14px}
.qt-preview svg{width:100%;height:auto;display:block}
.qt-price{border:2px solid var(--ink);padding:18px;background:var(--white)}
.qt-price b{display:block;font-family:var(--display);font-weight:400;font-size:2.1rem;line-height:1.1;margin:4px 0}
.qt-sum{font-size:.9rem;color:var(--gun);margin:10px 0 0;padding-left:1.1em}
@media (max-width:900px){.qt{grid-template-columns:1fr}.qt-side{position:static;order:-1}}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
@media print{.site-head,.catstrip,.mbar,.wa,.cookie,.cta-band,.site-foot{display:none}}