/* KRB Installations Ltd - Sandy, Bedfordshire */
:root{
  --blue:#2b5694; --blue-deep:#1f3f6f; --blue-bright:#3f6fb5; --blue-soft:#e8eef6;
  --green:#3f9d6b; --green-deep:#327f56; --green-soft:#e6f2eb;
  --ink:#22262c; --muted:#5c636d; --bg:#f4f6f8; --white:#fff; --line:#e2e5ea;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Open Sans',Arial,sans-serif;font-size:16px;line-height:1.66;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:'Montserrat',Arial,sans-serif;line-height:1.16;color:var(--blue-deep);font-weight:800}
h2{font-size:clamp(1.7rem,3.5vw,2.5rem);letter-spacing:-.01em}
h3{font-size:1.13rem;font-weight:700}
p{margin-bottom:1rem}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
.eyebrow{font-family:'Montserrat',sans-serif;font-weight:700;font-size:.77rem;letter-spacing:.18em;text-transform:uppercase;color:var(--green-deep);margin-bottom:.55rem}
section{padding:74px 0}
.center{text-align:center}
.lead{font-size:1.07rem;color:var(--muted);max-width:700px}
.center .lead{margin:0 auto}

.btn{display:inline-flex;align-items:center;gap:9px;font-family:'Montserrat',sans-serif;font-weight:700;font-size:.9rem;padding:14px 28px;border-radius:5px;cursor:pointer;border:2px solid transparent;transition:.18s;white-space:nowrap}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-deep)}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-deep)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:#fff;color:var(--blue-deep)}
.btn-outline{background:transparent;color:var(--blue);border-color:var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.topbar{background:var(--blue-deep);color:#bcc9da;font-size:.83rem}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:38px;flex-wrap:wrap}
.topbar svg{width:14px;height:14px;color:var(--green);vertical-align:-2px;margin-right:5px}
.topbar a{color:#dde6f0;font-weight:600}
.topbar a:hover{color:#fff}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:84px}
.brand img{height:54px;width:auto}
.nav-links{display:flex;gap:2px;list-style:none}
.nav-links a{display:block;padding:11px 15px;font-family:'Montserrat',sans-serif;font-weight:600;font-size:.89rem;color:var(--blue-deep);border-radius:5px;transition:.16s}
.nav-links a:hover,.nav-links a.active{background:var(--blue-soft);color:var(--blue)}
.nav-links li{position:relative}
.has-sub>a .caret{font-size:.7em;margin-left:4px}
.submenu{position:absolute;top:100%;left:0;min-width:236px;background:var(--blue-deep);border-radius:0 0 6px 6px;padding:6px 0;box-shadow:0 14px 26px rgba(0,0,0,.22);opacity:0;visibility:hidden;transform:translateY(6px);transition:.16s;list-style:none}
.has-sub:hover .submenu,.has-sub:focus-within .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.submenu a{display:block;padding:11px 18px;font-size:.84rem;color:#d6dee8;border-radius:0}
.submenu a:hover,.submenu a.active{background:var(--blue);color:#fff}
.nav-phone{display:inline-flex;align-items:center;gap:9px;background:var(--green);color:#fff;font-family:'Montserrat',sans-serif;font-weight:700;font-size:.96rem;padding:13px 21px;border-radius:5px;white-space:nowrap}
.nav-phone:hover{background:var(--green-deep)}
.nav-phone svg{width:17px;height:17px}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.burger span{display:block;width:24px;height:2px;background:var(--blue-deep);margin:5px 0}

/* hero */
.hero{position:relative;min-height:600px;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero::after{content:'';position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,38,64,.95) 0%,rgba(25,46,78,.82) 45%,rgba(25,46,78,.4) 100%)}
.hero .wrap{position:relative;z-index:2;padding:78px 22px}
.hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.6rem);max-width:18ch}
.hero .eyebrow{color:#86c9a4}
.hero p{font-size:1.12rem;color:#d4dbe5;max-width:52ch;margin:1rem 0 1.7rem}
.hero-cta{display:flex;gap:13px;flex-wrap:wrap}

/* page hero */
.page-hero{position:relative;color:#fff;overflow:hidden;padding:0}
.page-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.page-hero::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,38,64,.95),rgba(25,46,78,.72))}
.page-hero .wrap{position:relative;z-index:2;padding:62px 22px}
.page-hero h1{color:#fff;font-size:clamp(2rem,4.4vw,3rem)}
.page-hero .crumb{color:#86c9a4;font-size:.86rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-top:8px}
.page-hero .crumb a:hover{color:#fff}

/* trust */
.trust{background:var(--blue);color:#fff;padding:0}
.trust .wrap{display:flex;flex-wrap:wrap;gap:12px 36px;justify-content:center;padding:20px 22px}
.trust-item{display:flex;align-items:center;gap:9px;font-family:'Montserrat',sans-serif;font-weight:600;font-size:.89rem}
.trust-item svg{width:19px;height:19px;color:#86c9a4;flex:none}

/* stats */
.stats{background:var(--bg)}
.stats .wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;text-align:center}
.stat{background:#fff;border:1px solid var(--line);border-top:3px solid var(--green);padding:30px 18px}
.stat .num{font-family:'Montserrat',sans-serif;font-weight:800;font-size:clamp(2.4rem,5vw,3.6rem);color:var(--blue);line-height:1}
.stat .lab{font-family:'Montserrat',sans-serif;font-weight:600;color:var(--muted);margin-top:8px;font-size:.93rem}

/* split */
.split{background:#fff}
.split .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.split.rev .wrap{direction:rtl}
.split.rev .wrap>*{direction:ltr}
.split-media img{width:100%;border-radius:6px;object-fit:cover;min-height:350px}
.split .ticks{list-style:none;margin:16px 0}
.split .ticks li{display:flex;gap:11px;padding:5px 0;font-size:.97rem}
.split .ticks svg{width:20px;height:20px;color:var(--green);flex:none;margin-top:3px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:40px}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.card:hover{box-shadow:0 14px 32px rgba(20,38,64,.13);transform:translateY(-3px)}
.card .ci{aspect-ratio:16/9;overflow:hidden}
.card .ci img{width:100%;height:100%;object-fit:cover}
.card .cb{padding:26px;display:flex;flex-direction:column;flex:1}
.card h3{margin-bottom:7px;color:var(--blue-deep)}
.card p{font-size:.94rem;color:var(--muted);margin:0 0 14px}
.card .cl{margin-top:auto;font-family:'Montserrat',sans-serif;font-weight:700;font-size:.85rem;color:var(--green-deep)}

/* svc rows */
.svc-row{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;margin-bottom:48px;padding-top:6px}
.svc-row:last-child{margin-bottom:0}
.svc-row:nth-child(even) .sr-media{order:2}
.svc-row .sr-media img{width:100%;border-radius:6px;object-fit:cover;aspect-ratio:4/3;position:sticky;top:110px}
.svc-row .tag{display:inline-block;background:var(--green-soft);color:var(--green-deep);font-family:'Montserrat',sans-serif;font-weight:700;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;padding:5px 12px;margin-bottom:10px}
.svc-row h2{font-size:1.6rem;margin-bottom:8px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.chips span{background:var(--blue-soft);color:var(--blue-deep);border-radius:4px;padding:6px 12px;font-size:.84rem;font-weight:600}

/* accreditation */
.accred{background:var(--bg);text-align:center}
.accred .box{display:inline-flex;align-items:center;gap:22px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px 38px;margin-top:6px}
.accred .box img{height:84px;width:auto}
.accred .box .txt{text-align:left;max-width:320px}
.accred .box .txt b{font-family:'Montserrat',sans-serif;color:var(--blue-deep);font-size:1.05rem}
.accred .box .txt p{font-size:.9rem;color:var(--muted);margin:4px 0 0}

/* case studies */
.cs-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px}
.cs{background:#fff;border:1px solid var(--line);border-radius:6px;border-left:4px solid var(--green);padding:28px}
.cs .loc{font-family:'Montserrat',sans-serif;font-weight:700;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--green-deep)}
.cs h3{color:var(--blue-deep);margin:4px 0 9px;font-size:1.18rem}
.cs p{font-size:.93rem;color:var(--muted);margin:0}

/* cta */
.cta-band{background:var(--blue);color:#fff;text-align:center}
.cta-band h2{color:#fff;max-width:22ch;margin:0 auto}
.cta-band p{color:#cdd8e6;max-width:50ch;margin:13px auto 22px}
.cta-band .phone-xl{display:block;margin-top:14px;font-family:'Montserrat',sans-serif;font-weight:800;font-size:1.6rem;color:#fff}
.cta-band .phone-xl:hover{color:#86c9a4}

/* contact */
.contact{background:var(--bg)}
.contact .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:44px}
.c-form{background:#fff;border:1px solid var(--line);border-radius:8px;padding:32px}
.c-form label{display:block;font-family:'Montserrat',sans-serif;font-weight:600;font-size:.85rem;color:var(--blue-deep);margin-bottom:14px}
.c-form input,.c-form select,.c-form textarea{width:100%;margin-top:6px;padding:11px 13px;border:1px solid var(--line);border-radius:5px;font-family:inherit;font-size:.95rem;background:#fcfcfd}
.c-form input:focus,.c-form select:focus,.c-form textarea:focus{outline:2px solid var(--blue-soft);border-color:var(--blue)}
.c-form .btn{width:100%;justify-content:center;margin-top:6px}
.form-note{font-size:.78rem;color:var(--muted);margin-top:10px}
.c-info h3{margin-bottom:6px;color:var(--blue-deep)}
.c-info .row{display:flex;gap:13px;padding:15px 0;border-bottom:1px solid var(--line)}
.c-info .row svg{width:21px;height:21px;color:var(--green);flex:none;margin-top:3px}
.c-info .row b{font-family:'Montserrat',sans-serif;color:var(--blue-deep);font-size:.95rem}
.c-info .row a,.c-info .row span{color:var(--muted);font-size:.95rem}
.c-map{margin-top:20px;border-radius:6px;overflow:hidden;border:1px solid var(--line)}
.c-map iframe{display:block;width:100%;height:250px;border:0}

/* footer */
.site-footer{background:var(--blue-deep);color:#9aa9bd;padding:54px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1.1fr;gap:34px}
.foot-grid h4{color:#fff;font-size:1rem;margin-bottom:13px}
.foot-logo{background:#fff;padding:10px 14px;border-radius:6px;display:inline-block;margin-bottom:14px}
.foot-logo img{height:44px}
.foot-grid a{color:#9aa9bd;display:block;padding:4px 0;font-size:.93rem}
.foot-grid a:hover{color:#fff}
.foot-grid p{font-size:.92rem}
.foot-bottom{border-top:1px solid #2c466e;margin-top:32px;padding-top:20px;font-size:.83rem;text-align:center}

@media(max-width:1040px){
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line);box-shadow:0 14px 26px rgba(0,0,0,.1);padding:8px 0}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 22px;min-height:44px;border-radius:0}
  .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:var(--bg);padding:0;min-width:0}
  .submenu a{color:var(--blue-deep);padding-left:40px}
  .submenu a:hover,.submenu a.active{background:var(--blue-soft);color:var(--blue)}
  .burger{display:block}
}
@media(max-width:980px){
  .split .wrap,.contact .wrap{grid-template-columns:1fr;gap:32px}
  .split.rev .wrap{direction:ltr}
  .svc-row{grid-template-columns:1fr;gap:20px}
  .svc-row:nth-child(even) .sr-media{order:0}
  .svc-row .sr-media img{position:static}
  .cards.c3,.cs-grid{grid-template-columns:repeat(2,1fr)}
  .stats .wrap{grid-template-columns:1fr;gap:18px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  section{padding:54px 0}
  .cards,.cards.c3,.cs-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero{min-height:520px}
  .topbar .wrap{justify-content:center}
  .accred .box{flex-direction:column;text-align:center}
  .accred .box .txt{text-align:center}
}