/* i-Heat Services - Stanstead Abbotts, Hertfordshire
   Brand palette extracted from source CSS: #5DC9E1 sky blue + #D5002C red + #DAF3F8 pale tint */

:root{
  --copper: #1aa7c4;        /* primary blue (legacy var name; remapped to brand blue) */
  --copper-deep: #137a91;
  --copper-soft: #5DC9E1;   /* lighter sky blue, lifts on dark bg */
  --red: #D5002C;
  --red-dk: #a10022;
  --slate: #1f2d3e;
  --slate-deep: #131e2a;
  --slate-soft: #4d5e72;
  --ink: #0d1620;
  --ink-2: #1c2733;
  --ink-soft: #4d5868;
  --cream: #eaf6fa;
  --line: #d4dde6;
  --paper: #fbfdfe;
  --bg: #e8f2f6;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{ scroll-behavior:smooth; }
body{ font-family: 'Outfit', -apple-system, sans-serif; font-size: 17px; line-height: 1.65; color: var(--ink); background: var(--paper); }
img{ max-width:100%; height:auto; display:block; }
a{ color: var(--copper); text-decoration: none; }
a:hover{ color: var(--copper-deep); }
.container{ width: min(1180px, 92vw); margin: 0 auto; }
.serif-i{ font-family: 'Inter', sans-serif; }

.site-header{ background: var(--paper); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 40; }
.hd{ display:flex; align-items:center; justify-content:space-between; padding:16px 0; gap:22px; }
.bm{ display:flex; align-items:center; gap:14px; color:var(--ink); text-decoration:none; }
.bm img{ height: 44px; width: auto; }
.bm .nm{ font-family: 'Outfit', sans-serif; font-weight: 700; font-size: clamp(1.2rem, 2.2vw, 1.5rem); color: var(--slate-deep); letter-spacing: -.015em; line-height: 1.1; }
.bm .nm .heat{ color: var(--red); }
.foot-brand .heat{ color: var(--red); }
.bm .nm .sub{ display:block; font-size:.66rem; font-weight: 600; letter-spacing:.22em; text-transform:uppercase; color: var(--slate-soft); margin-top:4px; }

.nv{ display:none; list-style:none; gap:26px; align-items:center; }
@media(min-width:1240px){ .nv{ display:flex; } }
.nv a{ color: var(--slate); font-size:.84rem; white-space:nowrap; font-weight:500; padding:6px 0; position:relative; }
.nv a:hover, .nv a[aria-current="page"]{ color: var(--copper); }
.nv a::after{ content:''; position:absolute; left:0; bottom:-3px; width:0; height:2px; background: var(--copper); transition: width .22s ease; }
.nv a:hover::after, .nv a[aria-current="page"]::after{ width:100%; }

.phone-c{ display:inline-flex; align-items:center; gap:10px; background: var(--copper); color:#fff; padding:11px 20px; font-weight: 700; font-size:.9rem; }
.phone-c:hover{ background: var(--copper-deep); color:#fff; }
.phone-c svg{ width:14px; height:14px; }

.menu-btn{ display:inline-flex; flex-direction:column; gap:5px; background:transparent; border:0; padding:8px; cursor:pointer; }
@media(min-width:1240px){ .menu-btn{ display:none; } }
.menu-btn span{ width:24px; height:2px; background: var(--slate); }
.mn{ display:none; background:var(--paper); border-bottom:1px solid var(--line); }
.mn.open{ display:block; }
.mn ul{ list-style:none; padding:8px 24px 24px; }
.mn li{ border-bottom:1px solid var(--line); }
.mn a{ display:block; padding:14px 0; color: var(--slate); font-weight:500; }

/* HERO - diagonal cut */
.hero{
  background: linear-gradient(135deg, var(--slate-deep) 0%, var(--slate) 100%);
  color: #fff; position: relative; overflow: hidden;
  padding: 100px 0 140px;
}
.hero::after{
  content: '';
  position: absolute;
  bottom: -80px; left: 0; right: 0;
  height: 160px;
  background: var(--paper);
  transform: skewY(-3deg);
  transform-origin: bottom left;
}
.hero-grid{ display:grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; position: relative; z-index: 1; }
@media(max-width:880px){ .hero-grid{ grid-template-columns:1fr; gap:40px; } }
.hero-eyebrow{ display:inline-block; font-size:.74rem; letter-spacing:.28em; text-transform:uppercase; color: var(--copper-soft); font-weight: 700; padding: 6px 12px; border: 1px solid var(--copper-soft); margin-bottom: 26px; }
.hero h1{ font-family: 'Outfit', sans-serif; font-weight: 700; font-size: clamp(2.4rem, 5.4vw, 4.4rem); line-height: 1.04; letter-spacing: -.025em; color: #fff; margin-bottom: 22px; }
.hero h1 .ac{ color: var(--copper-soft); }
.hero p.lede{ font-size: clamp(1rem, 1.6vw, 1.18rem); line-height:1.55; color: rgba(255,255,255,.82); margin-bottom: 36px; max-width: 540px; }
.hero-act{ display:flex; gap:14px; flex-wrap:wrap; }
.hero-photo{ position: relative; }
.hero-photo .main{
  width: 100%;
  aspect-ratio: 5/4;
  background-size: cover; background-position: center;
  box-shadow: 0 32px 64px rgba(0,0,0,.4);
  border-top: 6px solid var(--copper);
}

.btn{ display:inline-flex; align-items:center; gap:10px; padding:14px 26px; font-family:'Outfit',sans-serif; font-size:.92rem; font-weight: 600; letter-spacing: .04em; text-decoration:none; cursor:pointer; border:0; transition: transform .15s ease, background .2s ease, color .2s ease; }
.btn-copper{ background: var(--copper); color: #fff; }
.btn-copper:hover{ background: var(--copper-deep); transform: translateY(-1px); color: #fff; }
.btn-outline{ background:transparent; color:#fff; border: 2px solid rgba(255,255,255,.3); }
.btn-outline:hover{ border-color: var(--copper-soft); color: var(--copper-soft); }
.btn-slate{ background: var(--slate); color: var(--cream); }
.btn-slate:hover{ background: var(--slate-deep); color: var(--copper-soft); }
.btn-cream{ background: var(--cream); color: var(--slate-deep); }
.btn-cream:hover{ background: #fff; }

/* Accreditation strip */
.creds{ background: var(--paper); padding: 36px 0; border-bottom: 1px solid var(--line); position: relative; z-index: 2; }
.cred-row{ display:flex; justify-content:center; align-items:center; flex-wrap:wrap; gap: 36px; }
.cred-row .lbl{ font-size:.72rem; font-weight: 700; letter-spacing:.22em; text-transform:uppercase; color: var(--ink-soft); margin-right: 8px; }
.cred-row img{ max-height: 50px; width: auto; }

section{ padding: 88px 0; }
@media(max-width:720px){ section{ padding: 60px 0; } }

.section-head{ max-width: 720px; margin-bottom: 48px; }
.section-head.center{ text-align: center; margin: 0 auto 48px; }
.section-head .eyebrow{ display:inline-block; font-size:.74rem; letter-spacing:.26em; text-transform:uppercase; color: var(--copper-deep); font-weight: 700; margin-bottom: 14px; }
.section-head h2{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.08; letter-spacing: -.02em; color: var(--slate-deep); margin-bottom: 14px; }
.section-head h2 .ac{ color: var(--copper); }
.section-head p.kicker{ color: var(--ink-soft); font-size: 1.04rem; max-width: 580px; }
.section-head.center p.kicker{ margin: 0 auto; }

/* Service tiles */
.services{ background: var(--bg); }
.svc-tiles{ display:grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
@media(max-width:880px){ .svc-tiles{ grid-template-columns: repeat(2, 1fr); } }
@media(max-width:480px){ .svc-tiles{ grid-template-columns: 1fr; } }
.svc-tile{ background: var(--paper); text-decoration:none; color: var(--ink); position: relative; transition: transform .2s ease; overflow: hidden; }
.svc-tile:hover{ transform: translateY(-4px); color: var(--ink); }
.svc-tile .pic{ aspect-ratio: 4/3; background-size: cover; background-position: center; }
.svc-tile .body{ padding: 22px 22px 26px; border-top: 3px solid var(--copper); }
.svc-tile h3{ font-family:'Outfit',sans-serif; font-size: 1.05rem; font-weight: 700; color: var(--slate-deep); margin-bottom: 6px; letter-spacing:-.01em; }
.svc-tile p{ font-size:.86rem; color: var(--ink-soft); line-height: 1.5; }

/* What we do list */
.what{ background: var(--paper); }
.what-list{ display: grid; grid-template-columns: 1fr 1fr; gap: 12px 36px; max-width: 920px; margin: 0 auto; }
@media(max-width:720px){ .what-list{ grid-template-columns: 1fr; } }
.what-list li{ list-style: none; padding: 14px 0 14px 32px; border-bottom: 1px solid var(--line); position: relative; color: var(--ink-2); font-weight: 500; }
.what-list li::before{ content: ''; position: absolute; left: 0; top: 17px; width: 16px; height: 16px; background: var(--copper); border-radius: 50%; }
.what-list li::after{ content: '✓'; position: absolute; left: 4px; top: 11px; color: white; font-weight: 700; font-size: .78rem; }

/* Guarantee band */
.guarantee{ background: var(--slate-deep); color: var(--cream); padding: 72px 0; }
.guarantee .container{ display: grid; grid-template-columns: 1fr 1.4fr; gap: 56px; align-items: center; }
@media(max-width:720px){ .guarantee .container{ grid-template-columns: 1fr; gap: 32px; text-align: center; } }
.guarantee .yr{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: clamp(5rem, 12vw, 8rem); color: var(--copper); line-height: 1; letter-spacing: -.04em; }
.guarantee .yr small{ font-size: clamp(1rem, 2vw, 1.4rem); color: var(--copper-soft); font-weight: 500; letter-spacing: .04em; }
.guarantee h3{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: clamp(1.6rem, 3vw, 2.2rem); color: #fff; margin-bottom: 14px; letter-spacing: -.015em; line-height: 1.15; }
.guarantee p{ color: rgba(250,246,238,.78); font-size: 1.02rem; max-width: 560px; }
@media(max-width:720px){ .guarantee p{ margin: 0 auto; } }

/* CTA */
.cta-band{ background: var(--copper); color: #fff; padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.cta-band::before{ content:''; position:absolute; bottom: -80px; right: -80px; width: 280px; height: 280px; background: var(--slate-deep); opacity: .12; border-radius: 50%; }
.cta-band h2{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: clamp(2rem, 4vw, 2.9rem); line-height: 1.1; margin-bottom: 18px; letter-spacing: -.02em; position: relative; z-index: 1; }
.cta-band h2 .ac{ color: var(--slate-deep); }
.cta-band p{ max-width: 540px; margin: 0 auto 32px; font-size: 1.04rem; color: rgba(255,255,255,.88); position: relative; z-index: 1; }
.cta-band .btns{ display:inline-flex; gap:14px; flex-wrap:wrap; justify-content:center; position:relative; z-index:1; }

/* Contact */
.contact{ background: var(--paper); padding: 80px 0; }
.c-grid{ display:grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: start; }
@media(max-width:880px){ .c-grid{ grid-template-columns:1fr; gap:40px; } }
.c-form{ background: var(--bg); padding: 40px 36px; border-top: 4px solid var(--copper); }
.c-form .row{ display:grid; gap:16px; margin-bottom:16px; grid-template-columns: 1fr 1fr; }
@media(max-width:600px){ .c-form .row{ grid-template-columns:1fr; } }
.c-form label{ display:block; font-size:.72rem; letter-spacing:.18em; text-transform:uppercase; color: var(--slate); font-weight: 700; margin-bottom: 6px; }
.c-form input, .c-form select, .c-form textarea{ width:100%; padding:12px 14px; border:1px solid var(--line); background: var(--paper); font-family:inherit; font-size:1rem; color: var(--ink); border-radius:0; }
.c-form input:focus, .c-form select:focus, .c-form textarea:focus{ outline: 2px solid var(--copper); outline-offset: -2px; }
.c-form textarea{ min-height:130px; resize:vertical; }
.c-form button{ width:100%; margin-top:12px; }
.c-form .promise{ margin-top:14px; font-size:.8rem; color: var(--ink-soft); }
.c-info h3{ font-family:'Outfit',sans-serif; font-size: 1.6rem; font-weight: 700; color: var(--slate-deep); margin-bottom: 22px; letter-spacing: -.015em; }
.c-info dl{ display:grid; grid-template-columns: 110px 1fr; row-gap:16px; align-items:baseline; }
.c-info dt{ font-size:.7rem; letter-spacing:.2em; text-transform:uppercase; color: var(--copper-deep); font-weight: 700; }
.c-info dd a{ color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.c-info dd a:hover{ color: var(--copper-deep); }
.c-map{ margin-top:28px; border:1px solid var(--line); }
.c-map iframe{ width:100%; border:0; display:block; }

/* Footer */
.site-footer{ background: var(--slate-deep); color: rgba(250,246,238,.72); padding: 64px 0 24px; border-top: 4px solid var(--copper); }
.fg{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
@media(max-width:720px){ .fg{ grid-template-columns: 1fr 1fr; gap: 32px; } }
.foot-brand{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: 1.4rem; color: #fff; margin-bottom: 12px; letter-spacing: -.015em; }
.foot-brand .heat{ color: var(--copper-soft); }
.foot-brand .sub{ display:block; font-size:.66rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase; color: var(--copper); margin-top: 6px; }
.fg h4{ font-size:.78rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: var(--copper-soft); margin-bottom: 14px; }
.fg ul{ list-style: none; }
.fg li{ margin-bottom: 8px; font-size: .92rem; }
.fg a{ color: rgba(250,246,238,.72); }
.fg a:hover{ color: #fff; }
.foot-bottom{ margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.06); display:flex; flex-wrap:wrap; justify-content:space-between; gap:14px; font-size:.78rem; color: rgba(250,246,238,.45); }

/* Page hero */
.page-hero{ background: var(--slate-deep); color: var(--cream); padding: 80px 0 56px; border-bottom: 4px solid var(--copper); position: relative; overflow:hidden; }
.page-hero h1{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: clamp(2.2rem, 4.6vw, 3.4rem); line-height: 1.06; letter-spacing: -.02em; margin-bottom: 16px; }
.page-hero h1 .ac{ color: var(--copper-soft); }
.page-hero p{ color: rgba(250,246,238,.82); max-width: 560px; font-size: 1.04rem; }
.page-hero .crumbs{ font-size:.72rem; letter-spacing:.22em; text-transform:uppercase; color: var(--copper-soft); margin-bottom: 22px; }
.page-hero .crumbs a{ color: var(--copper-soft); }

.sub-body{ background: var(--paper); padding: 80px 0; }
.sub-narrow{ max-width: 800px; margin: 0 auto; }
.sub-narrow p{ font-size:1.05rem; color: var(--ink-2); margin-bottom: 18px; line-height: 1.7; }
.sub-narrow p.lead{ font-family:'Outfit',sans-serif; font-weight: 500; font-size: 1.4rem; line-height: 1.5; color: var(--slate-deep); margin-bottom: 28px; }
.sub-narrow h2{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: clamp(1.5rem, 2.8vw, 2rem); margin: 32px 0 16px; color: var(--copper-deep); letter-spacing: -.015em; }
.sub-narrow h3{ font-family:'Outfit',sans-serif; font-weight: 700; font-size: clamp(1.2rem, 2vw, 1.45rem); margin: 38px 0 14px; color: var(--slate-deep); letter-spacing: -.005em; padding-left: 14px; border-left: 4px solid var(--copper); }
.sub-narrow ul.bul{ list-style: none; padding: 0; margin: 6px 0 22px; }
.sub-narrow ul.bul li{ position: relative; padding: 8px 0 8px 26px; color: var(--ink-2); font-size: 1rem; line-height: 1.55; border-bottom: 1px dashed var(--line); }
.sub-narrow ul.bul li:last-child{ border-bottom: 0; }
.sub-narrow ul.bul li::before{ content:""; position: absolute; left: 4px; top: 16px; width: 8px; height: 8px; border-radius: 50%; background: var(--copper); }
.sub-narrow strong{ color: var(--slate-deep); font-weight: 700; }

.sticky-call{ position:fixed; bottom:14px; left:14px; right:14px; background: var(--copper); color:#fff; padding:13px 18px; font-weight:600; font-size:.94rem; display:flex; justify-content:space-between; align-items:center; z-index:50; text-decoration:none; box-shadow: 0 14px 28px rgba(26,167,196,.4); }
.sticky-call:hover{ color:#fff; }
@media(min-width:900px){ .sticky-call{ display:none; } }