/* =========================================================
   Thompson Heating Ltd — stylesheet
   Palette: blueprint petrol blue + hi-vis amber + concrete grey
   Type:    Saira Condensed (display) / IBM Plex Sans (text)
   ========================================================= */

:root{
  --blueprint:      #0E2F3C;
  --blueprint-deep: #082129;
  --blueprint-mid:  #17495B;
  --steel:          #5E7580;
  --hivis:          #F2B705;
  --hivis-dark:     #C79203;
  --paper:          #EDEFEC;
  --paper-warm:     #F6F7F5;
  --white:          #FFFFFF;
  --ink:            #14222A;
  --rule:           rgba(14,47,60,.18);
  --rule-soft:      rgba(14,47,60,.10);
  --rule-light:     rgba(255,255,255,.20);

  --wrap: 1200px;
  --gut: clamp(1.25rem, 4vw, 3rem);

  --f-display: "Saira Condensed", "Arial Narrow", sans-serif;
  --f-text: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}

/* ---------- reset / base ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:.01ms !important; transition-duration:.01ms !important; }
}
body{
  margin:0;
  font-family:var(--f-text);
  font-size:1.0625rem;
  line-height:1.65;
  color:var(--ink);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; height:auto; display:block; }
a{ color:var(--blueprint); }
h1,h2,h3{
  font-family:var(--f-display);
  font-weight:700;
  line-height:1.03;
  letter-spacing:-.005em;
  margin:0;
}
p{ margin:0 0 1em; }
ul,ol,dl{ margin:0; padding:0; }
li{ list-style:none; }

:focus-visible{
  outline:3px solid var(--hivis);
  outline-offset:2px;
}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gut);
}

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:100;
  background:var(--hivis); color:var(--blueprint-deep);
  padding:.75rem 1.25rem; font-weight:600;
}
.skip-link:focus{ left:0; }

/* ---------- buttons ---------- */
.btn{
  display:inline-block;
  font-family:var(--f-display);
  font-size:1.15rem;
  font-weight:600;
  letter-spacing:.02em;
  text-decoration:none;
  padding:.7em 1.5em;
  border:2px solid transparent;
  transition:background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn--primary{
  background:var(--hivis);
  color:var(--blueprint-deep);
  border-color:var(--hivis);
}
.btn--primary:hover{ background:var(--hivis-dark); border-color:var(--hivis-dark); }
.btn--ghost{
  background:transparent;
  color:var(--blueprint);
  border-color:var(--rule);
}
.btn--ghost:hover{ border-color:var(--blueprint); }
.btn--block{ display:block; width:100%; text-align:center; cursor:pointer; }

/* =========================================================
   HEADER
   ========================================================= */
.masthead{
  background:var(--blueprint-deep);
  color:var(--white);
  position:relative;
  z-index:20;
}
.masthead__inner{
  display:flex;
  align-items:center;
  gap:1.5rem;
  min-height:84px;
}
.brand{
  display:flex; align-items:center; gap:.75rem;
  color:var(--white); text-decoration:none;
  margin-right:auto;
}
.brand__mark{ width:38px; height:38px; color:var(--hivis); flex:none; }
.brand__text{ display:flex; flex-direction:column; line-height:1.05; }
.brand__name{
  font-family:var(--f-display); font-weight:700;
  font-size:1.5rem; letter-spacing:.01em; white-space:nowrap;
}
.brand__sub{ font-size:.78rem; color:#9FB4BD; letter-spacing:.04em; }

.nav__list{ display:flex; gap:1.4rem; }
.nav__list a{
  color:#D6E1E6; text-decoration:none; font-size:.95rem; white-space:nowrap;
  padding-block:.4rem; border-bottom:2px solid transparent;
}
.nav__list a:hover{ color:var(--white); border-bottom-color:var(--hivis); }

.masthead__phone{
  display:flex; flex-direction:column; text-align:right;
  text-decoration:none; color:var(--white);
  padding-left:1.5rem; border-left:1px solid var(--rule-light);
}
.masthead__phone-label{ font-size:.7rem; color:#9FB4BD; letter-spacing:.06em; }
.masthead__phone-num{ font-family:var(--f-display); font-size:1.3rem; font-weight:600; white-space:nowrap; }
.masthead__phone:hover .masthead__phone-num{ color:var(--hivis); }

.nav-toggle{
  display:none;
  align-items:center; gap:.5rem;
  background:none; border:1px solid var(--rule-light);
  color:var(--white); font-family:var(--f-text); font-size:.9rem;
  padding:.5rem .8rem; cursor:pointer;
}
.nav-toggle__bars{ width:18px; height:2px; background:currentColor; position:relative; display:block; }
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:""; position:absolute; left:0; width:18px; height:2px; background:currentColor;
}
.nav-toggle__bars::before{ top:-6px; }
.nav-toggle__bars::after{ top:6px; }

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position:relative;
  background:var(--blueprint);
  color:var(--white);
  overflow:hidden;
}
.hero__grid-bg{
  position:absolute; inset:0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
}
.hero__inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:clamp(2rem,5vw,4.5rem);
  align-items:center;
  padding-block:clamp(3.5rem,7vw,6rem);
}
.hero__kicker{
  font-size:.92rem;
  color:var(--hivis);
  margin:0 0 1.25rem;
  padding-bottom:1rem;
  border-bottom:1px solid var(--rule-light);
  max-width:34ch;
}
.hero__title{
  font-size:clamp(2.6rem,5.6vw,4.3rem);
  max-width:17ch;
  margin-bottom:1.4rem;
}
.hero__lede{
  font-size:1.12rem;
  color:#CFDCE2;
  max-width:56ch;
  margin-bottom:2rem;
}
.hero__actions{ display:flex; flex-wrap:wrap; gap:1rem; }
.hero__actions .btn--ghost{ color:var(--white); border-color:var(--rule-light); }
.hero__actions .btn--ghost:hover{ border-color:var(--hivis); color:var(--hivis); }

.hero__media{ margin:0; position:relative; }
.hero__media img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
  filter:saturate(.92) contrast(1.03);
}
.hero__badge{
  position:absolute;
  left:0; bottom:0;
  background:var(--hivis);
  color:var(--blueprint-deep);
  padding:.85rem 1.25rem;
  display:flex; flex-direction:column;
  max-width:22rem;
}
.hero__badge-num{ font-family:var(--f-display); font-weight:700; font-size:1.45rem; line-height:1; }
.hero__badge-txt{ font-size:.82rem; line-height:1.3; margin-top:.25rem; }

/* =========================================================
   CREDENTIALS
   ========================================================= */
.creds{
  background:var(--blueprint-deep);
  color:var(--white);
  border-top:1px solid var(--rule-light);
}
.creds__inner{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
}
.creds__item{
  padding:1.9rem 1.75rem 1.9rem 0;
  border-right:1px solid var(--rule-light);
}
.creds__item:last-child{ border-right:0; }
.creds__item + .creds__item{ padding-left:1.75rem; }
.creds__value{
  display:block;
  font-family:var(--f-display); font-weight:700;
  font-size:1.7rem; color:var(--hivis); line-height:1.1;
}
.creds__label{ display:block; font-size:.92rem; color:#B8C8CF; margin-top:.35rem; max-width:34ch; }

/* =========================================================
   SECTION HEADINGS
   ========================================================= */
.sec-head{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:clamp(1.5rem,4vw,3.5rem);
  align-items:end;
  padding-bottom:1.5rem;
  margin-bottom:3rem;
  border-bottom:2px solid var(--rule);
}
.sec-head__title{ font-size:clamp(2.1rem,4vw,3.1rem); }
.sec-head__note{ margin:0; color:var(--steel); max-width:60ch; }
.sec-head--light{ border-bottom-color:var(--rule-light); }
.sec-head--light .sec-head__note{ color:#A9BCC4; }

/* =========================================================
   SECTORS
   ========================================================= */
.sectors{ padding-block:clamp(3.5rem,7vw,6rem); background:var(--white); }
.sectors__grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:clamp(1.5rem,3vw,3rem);
}
.sector{
  border-top:4px solid var(--blueprint);
  padding-top:1.5rem;
}
.sector__title{ font-size:1.85rem; margin-bottom:.6rem; }
.sector__body{ color:#3B4C55; max-width:48ch; }
.tag-list{ display:flex; flex-wrap:wrap; gap:.5rem; margin-top:1.25rem; }
.tag-list li{
  font-size:.82rem;
  padding:.3rem .7rem;
  background:var(--paper);
  color:var(--blueprint);
}

/* =========================================================
   SCOPE
   ========================================================= */
.scope{
  padding-block:clamp(3.5rem,7vw,6rem);
  background:var(--blueprint);
  color:var(--white);
}
.scope .sec-head__title{ color:var(--white); }
.scope__grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--rule-light);
  border:1px solid var(--rule-light);
}
.scope-card{
  background:var(--blueprint);
  padding:1.9rem 1.6rem 1.6rem;
}
.scope-card__icon{ width:40px; height:40px; color:var(--hivis); margin-bottom:1rem; }
.scope-card__title{ font-size:1.4rem; margin-bottom:.45rem; }
.scope-card p{ margin:0; font-size:.97rem; color:#BDCDD4; max-width:38ch; }

/* =========================================================
   PROCESS
   ========================================================= */
.process{ padding-block:clamp(3.5rem,7vw,6rem); background:var(--paper-warm); }
.steps{ counter-reset:none; display:grid; gap:0; }
.step{
  display:grid;
  grid-template-columns:5.5rem minmax(0,20ch) minmax(0,1fr);
  gap:clamp(1rem,3vw,2.5rem);
  align-items:baseline;
  padding-block:1.6rem;
  border-top:1px solid var(--rule-soft);
}
.step:last-child{ border-bottom:1px solid var(--rule-soft); }
.step__num{
  font-family:var(--f-display);
  font-size:2rem; font-weight:700;
  color:var(--hivis-dark);
  line-height:1;
}
.step__title{ font-size:1.5rem; }
.step p{ margin:0; color:#3B4C55; }

/* =========================================================
   WHY
   ========================================================= */
.why{ padding-block:clamp(3.5rem,7vw,6rem); background:var(--white); }
.why__inner{
  display:grid;
  grid-template-columns:minmax(0,.9fr) minmax(0,1.2fr);
  gap:clamp(2rem,5vw,4.5rem);
  align-items:start;
}
.why__title{ font-size:clamp(2rem,3.6vw,2.9rem); margin-bottom:1rem; max-width:16ch; }
.why__body{ color:#3B4C55; max-width:44ch; margin-bottom:1.75rem; }
.why__row{
  display:grid;
  grid-template-columns:minmax(0,15rem) minmax(0,1fr);
  gap:clamp(1rem,3vw,2.5rem);
  padding-block:1.35rem;
  border-top:1px solid var(--rule-soft);
}
.why__row:last-child{ border-bottom:1px solid var(--rule-soft); }
.why__row dt{
  font-family:var(--f-display);
  font-size:1.28rem; font-weight:600;
  color:var(--blueprint);
}
.why__row dd{ margin:0; color:#3B4C55; }

/* =========================================================
   COVERAGE
   ========================================================= */
.coverage{
  padding-block:clamp(3.5rem,7vw,6rem);
  background:var(--blueprint-deep);
  color:var(--white);
}
.coverage .sec-head__title{ color:var(--white); }
.coverage__list{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(11rem,1fr));
  gap:0;
  border-top:1px solid var(--rule-light);
}
.coverage__list li{
  font-family:var(--f-display);
  font-size:1.25rem;
  font-weight:500;
  padding:.75rem .5rem;
  border-bottom:1px solid var(--rule-light);
  color:#D6E1E6;
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact{ padding-block:clamp(3.5rem,7vw,6rem); background:var(--paper); }
.contact__inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  gap:clamp(2rem,5vw,4.5rem);
  align-items:start;
}
.contact__title{ font-size:clamp(2.1rem,4vw,3.1rem); margin-bottom:.9rem; }
.contact__lede{ color:#3B4C55; max-width:44ch; margin-bottom:2rem; }

.contact-block{
  display:grid;
  grid-template-columns:8rem minmax(0,1fr);
  gap:0;
}
.contact-block dt{
  font-weight:600;
  color:var(--steel);
  font-size:.9rem;
  padding-block:.85rem;
  border-top:1px solid var(--rule-soft);
}
.contact-block dd{
  margin:0;
  padding-block:.85rem;
  border-top:1px solid var(--rule-soft);
}
.contact-block address{ font-style:normal; }
.contact-block a{ color:var(--blueprint); text-decoration-thickness:1px; text-underline-offset:3px; }

/* ---------- form ---------- */
.contact__form-wrap{
  background:var(--white);
  border-top:4px solid var(--hivis);
  padding:clamp(1.5rem,3vw,2.5rem);
}
.rfq__intro{
  font-family:var(--f-display);
  font-size:1.45rem;
  color:var(--blueprint);
  margin-bottom:1.5rem;
}
.field{ margin-bottom:1.1rem; }
.field label{
  display:block;
  font-size:.86rem;
  font-weight:500;
  color:var(--steel);
  margin-bottom:.3rem;
}
.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field select,
.field textarea{
  width:100%;
  font-family:var(--f-text);
  font-size:1rem;
  color:var(--ink);
  background:var(--paper-warm);
  border:1px solid var(--rule-soft);
  border-bottom:2px solid var(--rule);
  padding:.65rem .75rem;
}
.field textarea{ resize:vertical; }
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-bottom-color:var(--hivis);
  background:var(--white);
}
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.field--check{ display:flex; align-items:flex-start; gap:.6rem; margin-bottom:1.5rem; }
.field--check input{ margin-top:.35rem; flex:none; }
.field--check label{ margin:0; font-size:.9rem; color:#3B4C55; }
.rfq__note{ font-size:.85rem; color:var(--steel); margin:.9rem 0 0; }
.field .field-error{ color:#B23A17; font-size:.82rem; margin-top:.25rem; display:block; }
.field input.is-invalid,
.field textarea.is-invalid{ border-bottom-color:#B23A17; }
.rfq__success{
  background:var(--blueprint);
  color:var(--white);
  padding:1.25rem;
  font-size:1rem;
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-foot{
  background:var(--blueprint-deep);
  color:#B8C8CF;
  padding-top:clamp(2.5rem,5vw,4rem);
  font-size:.95rem;
}
.site-foot a{ color:#D6E1E6; text-decoration:none; }
.site-foot a:hover{ color:var(--hivis); }
.site-foot__inner{
  display:grid;
  grid-template-columns:minmax(0,1.3fr) minmax(0,.8fr) minmax(0,1fr);
  gap:clamp(1.5rem,4vw,3rem);
  padding-bottom:2.5rem;
}
.site-foot__name{
  display:block;
  font-family:var(--f-display); font-weight:700;
  font-size:1.6rem; color:var(--white); margin-bottom:.5rem;
}
.site-foot__brand p{ max-width:40ch; margin:0; }
.site-foot__nav li{ padding-block:.2rem; }
.site-foot__contact p{ margin:0 0 .3rem; }
.site-foot__licence{ color:var(--hivis); margin-top:.75rem !important; }
.site-foot__legal{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:1rem;
  padding-block:1.25rem;
  border-top:1px solid var(--rule-light);
  font-size:.85rem;
}
.site-foot__legal p{ margin:0; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1020px){
  .scope__grid{ grid-template-columns:repeat(2,1fr); }
  .site-foot__inner{ grid-template-columns:1fr 1fr; }
}

@media (max-width: 900px){
  .nav-toggle{ display:inline-flex; order:3; }
  .nav{
    order:4;
    flex-basis:100%;
    display:none;
    border-top:1px solid var(--rule-light);
    padding-block:.75rem;
  }
  .nav.is-open{ display:block; }
  .nav__list{ flex-direction:column; gap:0; }
  .nav__list a{ display:block; padding:.6rem 0; border-bottom:1px solid var(--rule-light); }
  .masthead__inner{ flex-wrap:wrap; padding-block:.9rem; }
  .masthead__phone{ padding-left:1rem; }

  .hero__inner{ grid-template-columns:1fr; }
  .hero__title{ max-width:20ch; }
  .creds__inner{ grid-template-columns:1fr; }
  .creds__item{ padding:1.25rem 0; border-right:0; border-bottom:1px solid var(--rule-light); }
  .creds__item:last-child{ border-bottom:0; }
  .creds__item + .creds__item{ padding-left:0; }

  .sec-head{ grid-template-columns:1fr; align-items:start; }
  .sectors__grid{ grid-template-columns:1fr; }
  .why__inner{ grid-template-columns:1fr; }
  .why__row{ grid-template-columns:1fr; gap:.35rem; }
  .contact__inner{ grid-template-columns:1fr; }
  .step{ grid-template-columns:3.5rem 1fr; }
  .step p{ grid-column:2 / -1; }
}

@media (max-width: 620px){
  .masthead__phone-label{ display:none; }
  .scope__grid{ grid-template-columns:1fr; }
  .field-row{ grid-template-columns:1fr; }
  .contact-block{ grid-template-columns:1fr; }
  .contact-block dt{ padding-bottom:0; border-top:1px solid var(--rule-soft); }
  .contact-block dd{ border-top:0; padding-top:.15rem; }
  .site-foot__inner{ grid-template-columns:1fr; }
  .hero__badge{ position:static; max-width:none; }
}