/* Boiler Spares UK – hand-written, no build step */
:root{
  /* Acorn Gas Appliance Spares logo colours */
  --blue:#274699; --blue-2:#1C3478; --blue-deep:#16285E; --blue-tint:#E8EDF8;
  --red:#E8174A; --red-2:#C70E3B;
  --yellow:var(--red); --yellow-2:var(--red-2);
  --copper:var(--blue);
  --paper:#F4F6FB; --white:#fff;
  --ink:#141B2D; --steel:#596378; --line:#D8DDE8;
  --ok:#1E7A46; --warn:#9A3B12;
  --r:6px;
  --wide:"Archivo",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.55 var(--wide);font-variation-settings:"wdth" 100}
a{color:var(--blue)}
a:hover{color:var(--blue-2)}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid #F7B500;outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.01em}
h1,h2,h3{font-family:var(--wide);font-variation-settings:"wdth" 125;font-weight:800;line-height:1.1;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(1.7rem,3.6vw,2.6rem)}
h2{font-size:clamp(1.25rem,2.2vw,1.6rem)}
h3{font-size:1.05rem}
p{margin:0 0 1em;max-width:70ch}
.muted{color:var(--steel)}
.small{font-size:.875rem}

/* Header */
.notice{background:var(--red);color:#fff;text-align:center;font-size:.9rem;padding:6px 16px}
.top{background:var(--white);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;min-height:84px}
.logo{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--blue);margin-right:auto}
.logo img{display:block;height:58px;width:auto}
.logo span{font-variation-settings:"wdth" 112;font-weight:700;color:var(--blue);font-size:.95rem;line-height:1.25;border-left:2px solid var(--red);padding-left:12px}
.logo span small{display:block;font-weight:500;color:var(--steel);font-size:.78rem;font-variation-settings:"wdth" 100}
.call{text-decoration:none;color:var(--ink);text-align:right;line-height:1.2}
.call small{display:block;color:var(--steel);font-size:.78rem}

.call strong{white-space:nowrap;font-variation-settings:"wdth" 112;font-size:1.2rem;font-weight:800;color:var(--blue)}
.bask{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--white);background:var(--blue);padding:10px 14px;border-radius:var(--r);font-weight:600}
.bask .c{background:var(--red);color:#fff;border-radius:20px;min-width:24px;text-align:center;font-size:.85rem;padding:1px 7px}
.nav{background:var(--blue);border-top:4px solid var(--red);box-shadow:inset 0 3px 0 #fff}
.nav .wrap{display:flex;gap:4px;align-items:center;min-height:52px}
.nav form{flex:1;display:flex;max-width:560px}
.nav input{flex:1;border:0;border-radius:var(--r) 0 0 var(--r);padding:10px 12px;font:inherit;min-width:0}
.nav button{border:0;background:var(--red);color:#fff;font:600 .95rem var(--wide);padding:0 16px;border-radius:0 var(--r) var(--r) 0;cursor:pointer}
.nav a{color:#fff;text-decoration:none;padding:8px 10px;font-weight:500;white-space:nowrap}
.nav a:hover{text-decoration:underline}
.nav .links{margin-left:auto;display:flex}
@media (max-width:760px){
  .call small{display:none}.call strong{font-size:1rem}
  .logo span{display:none}
  .logo img{height:44px}
  .top .wrap{min-height:64px}
  .top .wrap{gap:10px}
  .nav .links{display:none}
  .nav form{max-width:none}
  .bask .t{display:none}
}

/* Buttons */
.btn{white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:var(--r);padding:11px 18px;font:600 1rem var(--wide);cursor:pointer;text-decoration:none;line-height:1.2}
.btn-go{background:var(--red);color:#fff}
.btn-go:hover{background:var(--red-2);color:#fff}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-2);color:#fff}
.btn-line{background:transparent;border:1.5px solid var(--blue);color:var(--blue)}
.btn-sm{padding:7px 12px;font-size:.9rem}
.btn-block{width:100%}

/* Hero: the rating plate */
.hero{position:relative;overflow:hidden;background:var(--blue);color:#fff;padding:52px 0 60px}
.hero::before{content:"";position:absolute;right:0;top:30px;width:52%;height:132px;pointer-events:none;
  background:repeating-linear-gradient(180deg,var(--red) 0 7px,transparent 7px 22px,rgba(255,255,255,.16) 22px 29px,transparent 29px 44px);
  -webkit-mask:linear-gradient(90deg,transparent,#000 35%);mask:linear-gradient(90deg,transparent,#000 35%)}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:6px;background:linear-gradient(180deg,var(--red) 0 3px,#fff 3px 6px)}
.hero .wrap{position:relative}
.hero .wrap{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center}
.hero h1{color:#fff;font-size:clamp(2rem,4.6vw,3.4rem)}
.hero p{color:#DCE3F4;font-size:1.1rem}
.plate{position:relative;background:linear-gradient(180deg,#E9ECEE,#D3D8DC);color:var(--ink);border-radius:10px;padding:30px 30px 26px;box-shadow:inset 0 1px 0 #fff,inset 0 -2px 0 #B9BFC4,0 18px 40px rgba(4,16,32,.35)}
.plate::before,.plate::after,.plate .s3,.plate .s4{content:"";position:absolute;width:13px;height:13px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#fff,#9AA2A9 60%,#6D757C);box-shadow:inset 0 0 0 1px #6D757C}
.plate::before{top:11px;left:11px}.plate::after{top:11px;right:11px}
.plate .s3{bottom:11px;left:11px}.plate .s4{bottom:11px;right:11px}
.plate label{display:block;font-variation-settings:"wdth" 125;font-weight:800;font-size:1.05rem;margin-bottom:10px}
.plate .row{display:flex;gap:8px}
.plate input{flex:1;min-width:0;border:2px solid var(--blue);border-radius:var(--r);padding:14px;font:500 1.1rem var(--wide);background:#fff}
.plate .hint{font-size:.9rem;color:#46515D;margin:12px 0 0}
.plate .hint a{color:var(--blue);font-weight:600}
@media (max-width:860px){.hero .wrap{grid-template-columns:1fr;gap:28px}.hero{padding:32px 0 36px}.hero::before{top:auto;bottom:18px;height:60px;width:70%}}
@media (max-width:480px){.plate{padding:24px 18px 20px}.plate .row{flex-direction:column}}

/* Suggest dropdown */
.sugg{position:relative}
.sugg ul{position:absolute;z-index:20;left:0;right:0;top:100%;margin:4px 0 0;padding:4px;list-style:none;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:0 10px 24px rgba(0,0,0,.15)}
.sugg li a{display:flex;justify-content:space-between;gap:12px;padding:8px 10px;text-decoration:none;color:var(--ink);border-radius:4px}
.sugg li a:hover,.sugg li a.on{background:var(--blue-tint)}
.sugg li small{color:var(--steel);white-space:nowrap}
.sugg li .k{font-size:.72rem;color:var(--blue);font-weight:700;margin-right:6px}

/* Sections */
.sec{padding:44px 0}
.sec-white{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.crumbs{font-size:.9rem;color:var(--steel);padding:18px 0 4px}
.crumbs a{color:var(--steel)}
.pagehead{padding:8px 0 22px}

/* Brand index: logo tiles */
.brands{display:grid;grid-template-columns:repeat(auto-fill,minmax(176px,1fr));gap:12px}
.brands a{display:flex;flex-direction:column;min-width:0;padding:14px 14px 12px;background:#fff;border:1px solid var(--line);border-radius:var(--r);text-decoration:none;color:var(--ink);position:relative;overflow:hidden}
.brands a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--blue)}
.brands a:hover{border-color:var(--blue)}
.brands a:hover::after{background:var(--red)}
.brands .lg{display:flex;align-items:center;justify-content:center;height:78px;width:100%;min-width:0;margin-bottom:10px;font-style:normal}
.brands .lg img{display:block;max-height:64px;max-width:100%;width:auto;height:auto;object-fit:contain}
.brands .lg em{font-style:normal;font-variation-settings:"wdth" 125;font-weight:800;font-size:1.3rem;color:var(--blue);text-align:center;line-height:1.1}
.brands a b{display:block;color:var(--ink);font-variation-settings:"wdth" 108;font-weight:700;font-size:.95rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-height:1.3em}
.brands a span{display:block;color:var(--steel);font-size:.8rem;margin-top:1px}
.brands a:hover b{color:var(--blue);text-decoration:underline}
.brandhead{display:flex;gap:24px;align-items:center}
.brandlogo{width:150px;height:auto;max-height:100px;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:8px}
@media (max-width:520px){.brands{grid-template-columns:1fr 1fr}.brandhead{flex-direction:column;align-items:flex-start;gap:12px}}


/* Steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;counter-reset:s;margin:0;padding:0;list-style:none}
.steps li{counter-increment:s;border-top:3px solid var(--blue);padding-top:14px;position:relative}
.steps li::after{content:"";position:absolute;left:0;top:-3px;width:48px;height:3px;background:var(--red)}
.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;margin-bottom:10px}
.steps h3{margin-bottom:.3em}
@media (max-width:760px){.steps{grid-template-columns:1fr}}

/* Model list */
.filter{display:flex;gap:8px;max-width:440px;margin:0 0 18px}
.filter input{flex:1;border:1.5px solid #AEB6BD;border-radius:var(--r);padding:10px 12px;font:inherit;min-width:0}
.az{display:flex;flex-wrap:wrap;gap:4px;margin:0 0 20px}
.az a{min-width:32px;text-align:center;padding:4px 6px;border:1px solid var(--line);background:#fff;border-radius:4px;text-decoration:none;font-weight:600}
.models{columns:3 260px;column-gap:32px}
.models .grp{break-inside:avoid;margin:0 0 18px}
.models .letter{font-variation-settings:"wdth" 125;font-weight:800;color:var(--blue);border-bottom:2px solid var(--red);margin:0 0 4px;padding-bottom:2px}
.models a{display:flex;justify-content:space-between;gap:8px;padding:5px 0;text-decoration:none;color:var(--ink);border-bottom:1px dotted var(--line)}
.models a:hover{color:var(--blue)}
.models a small{color:var(--steel);white-space:nowrap}
.models .sub{padding-left:14px}

/* Parts table */
.parts{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line)}
.parts th{text-align:left;font-size:.82rem;color:var(--steel);font-weight:600;padding:10px 12px;border-bottom:2px solid var(--blue);background:#F8F9FD}
.parts td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.parts tr:hover td{background:#F6F8FE}
.parts .pn{font-weight:700;white-space:nowrap}
.parts .pn a{text-decoration:none}
.parts .nm a{color:var(--ink);text-decoration:none}
.parts .nm a:hover{color:var(--blue);text-decoration:underline}
.parts .pr{text-align:right;white-space:nowrap;font-weight:700;color:var(--copper)}
.parts .pr small{display:block;font-weight:400;color:var(--steel);font-size:.78rem}
.parts .act{text-align:right;width:1%}
.parts .cfp{color:var(--steel);font-weight:600}
.parts .pr .vt{font-size:.75rem;font-weight:500;color:var(--steel)}
.dlnote{font-size:.9rem;color:var(--steel);margin:0 0 10px}
.buy .dl{font-size:.92rem;margin:0 0 12px}
@media (max-width:700px){
  .parts thead{display:none}
  .parts,.parts tbody,.parts tr,.parts td{display:block}
  .parts tr{display:grid;grid-template-columns:1fr auto;gap:2px 12px;padding:12px;border-bottom:1px solid var(--line)}
  .parts td{border:0;padding:0}
  .parts .pn{grid-column:1;font-size:.9rem}
  .parts .nm{grid-column:1}
  .parts .pr{grid-column:2;grid-row:1/3;align-self:center}
  .parts .act{grid-column:1/3;text-align:left;width:auto;margin-top:8px}
  .basket .parts .unit{display:none}
  .basket .parts .line{grid-column:2;grid-row:1/3}
  .basket .parts td:nth-child(3){grid-column:1/3;margin-top:8px}
}
.parts .pr small.each{display:none}
@media (max-width:700px){.parts .pr small.each{display:block}}

/* Part page */
.pp{display:grid;grid-template-columns:1fr 380px;gap:40px;align-items:start}
.pp .pic{background:#fff;border:1px solid var(--line);border-radius:var(--r);aspect-ratio:4/3;display:grid;place-items:center;color:var(--steel);text-align:center;padding:20px}
.pp .pic img{max-height:100%;object-fit:contain}
.spec{width:100%;border-collapse:collapse;margin:16px 0}
.spec th{text-align:left;font-weight:500;color:var(--steel);padding:8px 0;width:40%;border-bottom:1px solid var(--line)}
.spec td{padding:8px 0;border-bottom:1px solid var(--line);font-weight:600}
.buy{background:#fff;border:1px solid var(--line);border-top:4px solid var(--red);box-shadow:inset 0 3px 0 #fff;border-radius:var(--r);padding:22px;position:sticky;top:16px}
.buy .price{font-variation-settings:"wdth" 112;font-size:2.1rem;font-weight:800;color:var(--copper);line-height:1}
.buy .inc{color:var(--steel);margin:6px 0 16px}
.buy form{display:flex;gap:8px;margin:0 0 14px}
.qty{width:70px;border:1.5px solid #AEB6BD;border-radius:var(--r);padding:10px;font:inherit;text-align:center}
.buy .how{font-size:.9rem;color:var(--steel);border-top:1px solid var(--line);padding-top:14px;margin-top:4px}
.buy .how strong{color:var(--ink)}
.fits{columns:2 240px;column-gap:28px;padding:0;margin:0;list-style:none}
.fits li{break-inside:avoid;padding:4px 0;border-bottom:1px dotted var(--line)}
@media (max-width:860px){.pp{grid-template-columns:1fr}.buy{position:static}}

/* Basket & checkout */
.two{display:grid;grid-template-columns:1fr 360px;gap:32px;align-items:start}
@media (max-width:860px){.two{grid-template-columns:1fr}}
.box{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px}
.totals{width:100%;border-collapse:collapse}
.totals td{padding:6px 0}
.totals td:last-child{text-align:right;font-weight:600}
.totals .grand td{border-top:2px solid var(--ink);padding-top:10px;font-size:1.2rem;font-weight:800}
.flash{background:#E6F2EA;border-left:4px solid var(--ok);padding:12px 16px;margin:16px 0;border-radius:4px}
.alert{background:#FBEDE5;border-left:4px solid var(--warn);padding:12px 16px;margin:16px 0;border-radius:4px}
.field{margin:0 0 14px}
.field label{display:block;font-weight:600;margin:0 0 4px;font-size:.95rem}
.field input,.field textarea,.field select{width:100%;border:1.5px solid #AEB6BD;border-radius:var(--r);padding:10px 12px;font:inherit;background:#fff}
.field textarea{min-height:90px}
.field .err{color:var(--warn);font-size:.88rem;margin-top:4px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
@media (max-width:520px){.grid2{grid-template-columns:1fr}}
.hp{position:absolute;left:-9999px}

/* Pagination */
.pager{display:flex;flex-wrap:wrap;gap:6px;margin:22px 0;align-items:center}
.pager a,.pager span{padding:7px 12px;border:1px solid var(--line);border-radius:4px;background:#fff;text-decoration:none}
.pager .cur{background:var(--blue);color:#fff;border-color:var(--blue)}
.sugg li .k{color:var(--red-2)}
.pager .dis{color:#AAB}

/* Footer */
.foot{background:var(--blue-deep);border-top:5px solid var(--red);color:#C9D2EA;margin-top:56px;padding:40px 0 28px;font-size:.93rem}
.foot .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.foot h3{color:#fff;font-size:1rem}
.foot a{color:#E6EBF0}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin:0 0 6px}
.foot p{font-size:.9rem}
.foot ul+p,.foot p+ul{margin-top:.6em}
.foot .legal{max-width:none;grid-column:1/-1;border-top:1px solid #2E4180;padding-top:18px;color:#93A0C6;font-size:.85rem}
@media (max-width:760px){.foot .wrap{grid-template-columns:1fr 1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}