/* internalglazing.uk — "light through a screen"
   bar #16191A · plaster #FAFAF6 · glass #E4ECE9 · edge green #2E6A5C · reed #C5D0CC · oak #9C6B3E */
:root{
  --bar:#16191A; --bar-2:#2B3031; --plaster:#FAFAF6; --glass:#E4ECE9; --glass-2:#F1F5F3;
  --edge:#2E6A5C; --edge-dk:#22524A; --reed:#C5D0CC; --oak:#9C6B3E; --muted:#4D5654;
  --ui:"Jost",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --read:"Newsreader",Georgia,"Times New Roman",serif;
  --w:1200px; --gut:clamp(18px,4vw,40px); --bw:6px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:120px}
body{margin:0;background:var(--plaster);color:var(--bar);font-family:var(--read);font-size:1.125rem;line-height:1.62;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:var(--edge-dk);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{color:var(--bar)}
:focus-visible{outline:3px solid var(--edge);outline-offset:2px}
h1,h2,h3,h4{font-family:var(--ui);font-weight:500;line-height:1.12;letter-spacing:-.015em;margin:0 0 .5em}
h1{font-size:clamp(2.2rem,5.2vw,4rem);letter-spacing:-.025em}
h2{font-size:clamp(1.6rem,3vw,2.3rem)}
h3{font-size:1.25rem;letter-spacing:-.005em}
p{margin:0 0 1em;max-width:68ch}
ul{padding-left:1.1em}
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px 12px}
.ui{font-family:var(--ui)}
.muted{color:var(--muted)}
.small{font-size:.9rem}

/* header */
.hdr{position:sticky;top:0;z-index:40;background:rgba(250,250,246,.97);border-bottom:1px solid var(--reed);backdrop-filter:saturate(1.2) blur(6px)}
.hdr-row{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--bar);font-family:var(--ui);font-size:1.28rem;font-weight:500;letter-spacing:-.01em;white-space:nowrap}
.brand b{font-weight:500;color:var(--edge)}
.brand svg{flex:none}
.nav{display:flex;gap:22px;margin-left:auto;font-family:var(--ui);font-size:1rem}
.nav a{color:var(--bar);text-decoration:none;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current=page]{border-bottom-color:var(--bar)}
.hdr-cta{display:flex;gap:10px;align-items:center}
.tel{font-family:var(--ui);font-weight:500;color:var(--bar);text-decoration:none;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--ui);font-size:1rem;font-weight:500;background:var(--edge);color:#fff;border:0;border-radius:2px;padding:12px 18px;text-decoration:none;cursor:pointer;min-height:46px}
.btn:hover{background:var(--edge-dk);color:#fff}
.btn.ghost{background:transparent;color:var(--bar);box-shadow:inset 0 0 0 1.5px var(--bar)}
.btn.ghost:hover{background:var(--bar);color:#fff}
.btn.light{background:#fff;color:var(--bar)}
.menu-btn{display:none;background:none;border:1.5px solid var(--bar);border-radius:2px;font-family:var(--ui);padding:8px 12px;font-size:.95rem}
.strip{border-top:1px solid var(--reed);background:var(--glass-2)}
.strip ul{list-style:none;margin:0;padding:0;display:flex;gap:0;overflow-x:auto;scrollbar-width:thin}
.strip li{flex:none}
.strip a{display:block;padding:9px 14px;font-family:var(--ui);font-size:.92rem;color:var(--bar);text-decoration:none;border-right:1px solid var(--reed)}
.strip li:first-child a{border-left:1px solid var(--reed)}
.strip a:hover{background:#fff}

/* hero */
.hero{padding:clamp(28px,5vw,64px) 0 clamp(36px,5vw,72px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(24px,4vw,56px);align-items:start}
.lede{font-size:1.28rem;line-height:1.55;max-width:34em}
.ticks{list-style:none;padding:0;margin:18px 0 26px;font-family:var(--ui);display:grid;gap:8px}
.ticks li{display:flex;gap:10px;align-items:baseline}
.ticks li::before{content:"";flex:none;width:12px;height:12px;border:2px solid var(--edge);border-radius:1px;transform:translateY(1px);background:linear-gradient(var(--edge),var(--edge)) center/4px 4px no-repeat}
.crumbs{font-family:var(--ui);font-size:.9rem;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 6px}

/* the screen: photo seen through glazing bars */
.screen{position:relative;border:10px solid var(--bar);background:var(--glass);aspect-ratio:4/5;overflow:hidden}
.screen.wide{aspect-ratio:16/10}
.screen img{width:100%;height:100%;object-fit:cover}
.screen .bars{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,var(--bar) 0 5px,transparent 5px),linear-gradient(to bottom,var(--bar) 0 5px,transparent 5px);
  background-size:calc(100% / 3) 100%,100% calc(100% / 4);background-position:-2.5px 0,0 -2.5px;
  clip-path:inset(0 0 0 0)}
.screen .handle{position:absolute;right:calc(100% / 3 + 14px);top:52%;width:6px;height:64px;background:var(--bar);border-radius:3px;pointer-events:none}
.screen .cap{position:absolute;left:0;bottom:0;background:rgba(22,25,26,.78);color:#fff;font-family:var(--ui);font-size:.78rem;padding:4px 10px}
@media (prefers-reduced-motion:no-preference){
  .screen.draw .bars{animation:draw 1.1s cubic-bezier(.2,.7,.1,1) .15s both}
  @keyframes draw{from{clip-path:inset(0 0 100% 0)}to{clip-path:inset(0 0 0 0)}}
}

/* forms */
.card{background:#fff;border:1px solid var(--reed);border-top:var(--bw) solid var(--bar);padding:22px}
.card h2,.card h3{font-size:1.35rem}
form .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
label{display:block;font-family:var(--ui);font-size:.9rem;margin:0 0 4px;color:var(--bar)}
input,select,textarea{width:100%;font:inherit;font-family:var(--ui);font-size:1rem;padding:11px 12px;border:1.5px solid #9fb0ab;border-radius:2px;background:#fff;color:var(--bar)}
input:focus,select:focus,textarea:focus{border-color:var(--edge);outline:none;box-shadow:0 0 0 3px rgba(46,106,92,.2)}
.field{margin-bottom:12px}
.consent{display:flex;gap:10px;align-items:flex-start;font-family:var(--ui);font-size:.85rem;color:var(--muted);margin:6px 0 14px}
.consent input{width:auto;margin-top:3px}
.hp{position:absolute;left:-5000px;width:1px;height:1px;overflow:hidden}
.form-note{font-family:var(--ui);font-size:.82rem;color:var(--muted);margin:10px 0 0}

/* sections */
.sec{padding:clamp(40px,6vw,80px) 0}
.sec.tint{background:var(--glass-2);border-top:1px solid var(--reed);border-bottom:1px solid var(--reed)}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:26px}
.sec-head p{margin:0;color:var(--muted)}

/* trust strip — mullion dividers */
.trust{border-top:var(--bw) solid var(--bar);border-bottom:1px solid var(--reed);background:#fff}
.trust ul{list-style:none;margin:0 auto;padding:0;display:grid;grid-template-columns:repeat(5,1fr)}
.trust li{padding:16px 18px;font-family:var(--ui);font-size:.95rem;line-height:1.3;border-left:3px solid var(--bar);display:flex;gap:10px;align-items:center}
.trust li:first-child{border-left:0}
.trust svg{flex:none}

/* USP: a four-pane screen */
.panes{display:grid;grid-template-columns:repeat(4,1fr);border:var(--bw) solid var(--bar);background:var(--bar);gap:4px}
.pane{background:var(--glass);padding:24px 22px 26px}
.pane h3{font-size:1.15rem;margin-top:12px}
.pane p{font-size:1rem;margin:0}

/* product tiles */
.cat-title{font-family:var(--ui);font-size:1.05rem;font-weight:500;margin:34px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--reed);color:var(--muted)}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:28px 24px}
.tile{display:flex;flex-direction:column;text-decoration:none;color:var(--bar)}
.tile .ph{position:relative;aspect-ratio:4/3;background:var(--glass);border-top:4px solid var(--bar);overflow:hidden}
.tile .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.tile:hover .ph img{transform:scale(1.03)}
.tile .ttl{display:flex;gap:10px;align-items:center;margin-top:12px}
.tile .ttl h3{margin:0;font-size:1.18rem}
.tile p{font-size:1rem;margin:6px 0 8px;color:var(--muted)}
.tile .more{font-family:var(--ui);font-size:.92rem;color:var(--edge-dk);text-decoration:underline;text-underline-offset:.2em}
.tile:hover h3{text-decoration:underline;text-underline-offset:.15em}

/* review band (honest) */
.reviews{display:grid;grid-template-columns:1.1fr 1fr 1fr 1fr;gap:0;border:1px solid var(--reed);background:#fff}
.reviews > div{padding:22px;border-left:1px solid var(--reed)}
.reviews > div:first-child{border-left:0;background:var(--glass)}
.reviews h3{font-size:1.1rem}
.reviews p{font-size:1rem;margin:0}

/* steps */
.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:2px solid var(--bar);padding-top:14px}
.steps li::before{content:counter(s);font-family:var(--ui);font-size:2.4rem;font-weight:400;line-height:1;color:var(--edge);display:block;margin-bottom:10px}
.steps h3{font-size:1.12rem}
.steps p{font-size:1rem;margin:0}

/* faq */
.faq details{border-top:1px solid var(--reed);padding:4px 0}
.faq details:last-child{border-bottom:1px solid var(--reed)}
.faq summary{cursor:pointer;list-style:none;font-family:var(--ui);font-size:1.12rem;font-weight:500;padding:14px 40px 14px 0;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:6px;top:50%;width:14px;height:14px;margin-top:-7px;
  background:linear-gradient(var(--bar),var(--bar)) center/14px 2px no-repeat,linear-gradient(var(--bar),var(--bar)) center/2px 14px no-repeat;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0 0 16px}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
.chips a{display:inline-block;padding:7px 12px;border:1px solid var(--reed);background:#fff;font-family:var(--ui);font-size:.92rem;color:var(--bar);text-decoration:none}
.chips a:hover{border-color:var(--bar)}

/* ink CTA band */
.ink{background:var(--bar);color:#fff}
.ink .inner{display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;padding:clamp(36px,5vw,64px) 0}
.ink h2{color:#fff}
.ink p{color:#d6dedb}
.ink .acts{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.ink a.tel{color:#fff}

/* content pages */
.cols{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:clamp(24px,4vw,56px);align-items:start}
.aside-sticky{position:sticky;top:130px}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.3em}
.prose ul li{margin-bottom:.35em}
.spec{border:1px solid var(--reed);background:#fff;margin:18px 0}
.spec div{display:grid;grid-template-columns:170px 1fr;border-top:1px solid var(--reed)}
.spec div:first-child{border-top:0}
.spec dt,.spec dd{margin:0;padding:10px 14px}
.spec dt{font-family:var(--ui);font-size:.92rem;background:var(--glass-2);border-right:1px solid var(--reed)}
.price{display:flex;flex-wrap:wrap;gap:6px 18px;align-items:baseline;border-left:var(--bw) solid var(--edge);padding:10px 16px;background:#fff;margin:14px 0}
.price strong{font-family:var(--ui);font-size:1.5rem;font-weight:500}
.tbl-wrap{overflow-x:auto;margin:14px 0}
table{border-collapse:collapse;width:100%;font-family:var(--ui);font-size:.95rem;background:#fff}
th,td{border:1px solid var(--reed);padding:9px 12px;text-align:left;vertical-align:top}
th{background:var(--glass-2);font-weight:500}
.links-grid{columns:3;column-gap:24px;list-style:none;padding:0;margin:0;font-family:var(--ui);font-size:.97rem}
.links-grid li{break-inside:avoid;padding:4px 0}
.note{font-family:var(--ui);font-size:.88rem;color:var(--muted);border-left:3px solid var(--reed);padding:6px 12px;margin:16px 0}
.svgbadge{flex:none}

/* quote tool */
.qt{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:clamp(20px,3vw,40px);align-items:start}
.qt-steps{display:flex;gap:0;list-style:none;margin:0 0 18px;padding:0;font-family:var(--ui);font-size:.9rem;border:1px solid var(--reed);background:#fff}
.qt-steps li{flex:1;padding:9px 10px;border-left:1px solid var(--reed);color:var(--muted)}
.qt-steps li:first-child{border-left:0}
.qt-steps li.on{background:var(--bar);color:#fff}
.qt-step{display:none;border:0;margin:0;padding:0;min-width:0}.qt-step.on{display:block}.qt-step legend{padding:0;width:100%}.qt-step legend h2:focus{outline:none}
.opts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:14px}
.opt{position:relative}
.opt input{position:absolute;opacity:0;width:1px;height:1px}
.opt span{display:block;border:1.5px solid var(--reed);background:#fff;padding:12px;font-family:var(--ui);font-size:.97rem;cursor:pointer;min-height:48px}
.opt input:checked + span{border-color:var(--bar);box-shadow:inset 0 0 0 1.5px var(--bar);background:var(--glass-2)}
.opt input:focus-visible + span{outline:3px solid var(--edge);outline-offset:2px}
.qt-nav{display:flex;justify-content:space-between;gap:10px;margin-top:10px}
.qt-out{position:sticky;top:130px}
.qt-price{font-family:var(--ui);font-size:clamp(1.6rem,3vw,2.2rem);font-weight:500;letter-spacing:-.01em;margin:6px 0 2px}
#qt-svg{width:100%;height:auto;background:var(--glass-2);border:1px solid var(--reed)}
.qt-sum{font-family:var(--ui);font-size:.92rem;margin:10px 0 0;padding:0;list-style:none}
.qt-sum li{display:flex;justify-content:space-between;border-top:1px solid var(--reed);padding:6px 0}

/* footer */
.ftr{background:var(--bar);color:#cfd8d5;font-family:var(--ui);font-size:.95rem;padding:48px 0 110px}
.ftr a{color:#fff;text-decoration:none}
.ftr a:hover{text-decoration:underline}
.ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.ftr h3{color:#fff;font-size:1rem;margin-bottom:12px}
.ftr ul{list-style:none;padding:0;margin:0}
.ftr li{padding:3px 0}
.ftr .legal{border-top:1px solid #39403f;margin-top:32px;padding-top:18px;font-size:.85rem;line-height:1.55;color:#aab6b2}
.ftr .brand{color:#fff;margin-bottom:12px}
.ftr .brand b{color:#8fc4b5}
.psrc{display:inline-flex;align-items:center;gap:8px;border:1px solid #4b5553;padding:8px 12px;margin:4px 0 16px;color:#fff !important}
.nap p{margin:0 0 4px;font-size:.95rem;color:#cfd8d5}

/* sticky mobile bar, whatsapp, cookie */
.mbar{display:none}
.wa{position:fixed;left:16px;bottom:18px;z-index:45;width:54px;height:54px;border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.25)}
.cookie{position:fixed;left:16px;right:16px;bottom:16px;z-index:60;max-width:640px;margin:0 auto;background:#fff;border:1px solid var(--reed);border-top:var(--bw) solid var(--bar);padding:16px;font-family:var(--ui);font-size:.92rem;display:none}
.cookie.on{display:block}
.cookie .acts{display:flex;gap:10px;margin-top:10px}

@media (max-width:1020px){
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid var(--reed);padding:6px var(--gut) 12px}
  .nav.open a{padding:12px 0;border-bottom:1px solid var(--reed)}
  .menu-btn{display:inline-block;margin-left:auto}
  .hdr-cta .btn{display:none}
  .hero-grid,.cols,.qt,.ink .inner{grid-template-columns:1fr}
  .aside-sticky,.qt-out{position:static}
  .trust ul{grid-template-columns:repeat(2,1fr)}
  .trust li{border-left:0;border-top:1px solid var(--reed)}
  .panes{grid-template-columns:repeat(2,1fr)}
  .tiles{grid-template-columns:repeat(2,1fr)}
  .reviews{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .ftr-grid{grid-template-columns:1fr 1fr}
  .links-grid{columns:2}
  .ink .acts{justify-content:flex-start}
}
@media (max-width:720px){
  body{font-size:1.06rem}
  .tel.hdr-tel{display:none}
  .screen{aspect-ratio:4/3}
  .tiles,.reviews,.steps,.panes,.ftr-grid{grid-template-columns:1fr}
  .reviews > div{border-left:0;border-top:1px solid var(--reed)}
  form .row{grid-template-columns:1fr}
  .opts{grid-template-columns:1fr}
  .links-grid{columns:1}
  .spec div{grid-template-columns:1fr}
  .spec dt{border-right:0}
  .mbar{display:grid;grid-template-columns:1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:50;background:var(--bar);border-top:1px solid #39403f}
  .mbar a{display:flex;align-items:center;justify-content:center;min-height:56px;font-family:var(--ui);font-weight:500;color:#fff;text-decoration:none}
  .mbar a + a{background:var(--edge)}
  .wa{bottom:72px;width:48px;height:48px}
  .cookie{bottom:66px}
  .sec-head{display:block}
}
@media print{.hdr,.mbar,.wa,.cookie,.strip{display:none}}