/* Three Spires Heating & Plumbing - "The Symptom Triage"
   Bitter (slab display) + IBM Plex Sans (body). Light "cold -> warm" palette.
   Petrol gas-flame teal primary, single ember accent, Gas-Safe green. */

:root{
  --paper:#FAF9F7; --paper-2:#F2EEE8; --paper-3:#ECE7DF;
  --ink:#15222B; --ink-2:#3C4A54; --muted:#66707A;
  --line:#E4DED4; --line-2:#D3CCC0;

  --flame:#0C6B77; --flame-deep:#094C55; --flame-tint:#E1EFF0; --flame-ink:#0A5C66;
  --ember:#E4722A; --ember-deep:#C55E1C; --ember-tint:#FBE7D8;
  --ok:#2E7D52; --ok-tint:#E4F1E9;

  --display:"Bitter",Georgia,"Times New Roman",serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;

  --r:9px; --r-lg:14px;
  --shadow:0 1px 2px rgba(21,34,43,.05), 0 10px 30px -12px rgba(21,34,43,.18);
  --shadow-sm:0 1px 2px rgba(21,34,43,.06), 0 4px 12px -6px rgba(21,34,43,.14);
  --wrap:1120px; --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--body); font-size:17px; line-height:1.6;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--display); font-weight:700; line-height:1.08; letter-spacing:-.01em; margin:0}
p{margin:0}
a{color:var(--flame-ink); text-underline-offset:3px}
img{max-width:100%; display:block}
.wrap{max-width:var(--wrap); margin:0 auto; padding:0 22px}
.skip{position:absolute; left:-9999px; top:0; background:var(--ink); color:#fff; padding:10px 16px; z-index:200}
.skip:focus{left:12px; top:12px}
:focus-visible{outline:3px solid var(--flame); outline-offset:2px; border-radius:4px}
.it{font-style:italic}
.u{color:var(--ember-deep)}

/* ---------- buttons ---------- */
.btn{display:inline-flex; align-items:center; gap:.5rem; font-family:var(--body);
  font-weight:600; font-size:1rem; padding:.85rem 1.35rem; border-radius:var(--r);
  border:2px solid transparent; cursor:pointer; text-decoration:none; transition:transform .12s var(--ease), background .15s, box-shadow .15s; white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-call{background:var(--ember); color:#fff; box-shadow:var(--shadow-sm)}
.btn-call:hover{background:var(--ember-deep)}
.btn-ghost{background:#fff; color:var(--flame-deep); border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--flame); background:var(--flame-tint)}
.btn-teal{background:var(--flame); color:#fff}
.btn-teal:hover{background:var(--flame-deep)}
.btn-lg{padding:1.05rem 1.7rem; font-size:1.08rem}
.btn svg{width:1.15em; height:1.15em; flex:none}

.chip{display:inline-flex; align-items:center; gap:.45rem; font-size:.85rem; font-weight:600;
  padding:.34rem .7rem; border-radius:100px; background:#fff; border:1px solid var(--line-2); color:var(--ink-2)}
.chip .dot{width:.5rem; height:.5rem; border-radius:50%; background:var(--ok)}
.stars{color:var(--ember); letter-spacing:1px}

/* ---------- header ---------- */
.site-head{position:sticky; top:0; z-index:100; background:rgba(250,249,247,.9); backdrop-filter:blur(10px); border-bottom:1px solid var(--line)}
.bar{display:flex; align-items:center; justify-content:space-between; gap:1rem; height:70px}
.brand{display:flex; align-items:center; gap:.6rem; text-decoration:none; color:var(--ink)}
.brand .flame{width:30px; height:34px; flex:none}
.brand b{font-family:var(--display); font-weight:700; font-size:1.16rem; line-height:1; letter-spacing:-.02em}
.brand span{display:block; font-size:.66rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted); margin-top:2px; font-family:var(--body); font-weight:600}
.nav{display:flex; align-items:center; gap:1.6rem}
.nav a.link{color:var(--ink-2); text-decoration:none; font-weight:500; font-size:.96rem}
.nav a.link:hover{color:var(--flame-deep)}
.head-call{display:flex; align-items:center; gap:.9rem}
.head-num{font-family:var(--display); font-weight:700; font-size:1.1rem; color:var(--ink); text-decoration:none; letter-spacing:-.01em}
.head-num:hover{color:var(--ember-deep)}
.navtoggle{display:none; background:#fff; border:1px solid var(--line-2); border-radius:var(--r); width:44px; height:44px; align-items:center; justify-content:center; color:var(--ink)}

/* ---------- hero ---------- */
.hero{position:relative; overflow:hidden; padding:clamp(2.4rem,6vw,4.6rem) 0 clamp(2.6rem,6vw,4.4rem)}
.hero::before{content:""; position:absolute; inset:0; z-index:0;
  background:
    radial-gradient(60% 70% at 88% 6%, rgba(228,114,42,.16), transparent 60%),
    radial-gradient(70% 80% at 6% 100%, rgba(12,107,119,.12), transparent 55%);}
.hero .wrap{position:relative; z-index:1}
.hero-grid{display:grid; grid-template-columns:1.15fr .85fr; gap:clamp(1.5rem,4vw,3rem); align-items:center}
.eyebrow-line{display:inline-flex; align-items:center; gap:.6rem; color:var(--flame-deep); font-weight:600; font-size:.92rem; margin-bottom:1rem}
.eyebrow-line .pip{width:26px; height:2px; background:var(--ember)}
.hero h1{font-size:clamp(2.35rem,5.4vw,3.9rem)}
.hero h1 .warm{color:var(--ember-deep)}
.hero-sub{font-size:1.14rem; color:var(--ink-2); margin-top:1.15rem; max-width:33ch}
.hero-cta{display:flex; flex-wrap:wrap; gap:.8rem; margin-top:1.7rem}
.hero-trust{display:flex; flex-wrap:wrap; align-items:center; gap:.7rem 1.2rem; margin-top:1.7rem; padding-top:1.4rem; border-top:1px solid var(--line)}
.hero-trust .t{display:flex; align-items:center; gap:.5rem; font-size:.94rem; color:var(--ink-2); font-weight:500}
.hero-trust svg{width:1.1rem; height:1.1rem; color:var(--flame)}

/* hero visual: gas-safe flame card */
.hero-card{background:linear-gradient(165deg,#0C6B77,#083E46); border-radius:var(--r-lg); padding:1.8rem; color:#fff; box-shadow:var(--shadow); position:relative; overflow:hidden}
.hero-card::after{content:""; position:absolute; right:-40px; bottom:-40px; width:200px; height:200px; background:radial-gradient(circle,rgba(228,114,42,.35),transparent 68%)}
.hero-card .flame-big{width:64px; height:74px; margin-bottom:1rem; position:relative; z-index:1}
.hero-card h3{color:#fff; font-size:1.5rem; position:relative; z-index:1}
.hero-card p{color:rgba(255,255,255,.82); margin-top:.5rem; font-size:.98rem; position:relative; z-index:1}
.hero-card .safe{display:inline-flex; align-items:center; gap:.5rem; margin-top:1.3rem; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.22); border-radius:100px; padding:.4rem .9rem; font-size:.86rem; font-weight:600; position:relative; z-index:1}
.hero-card .safe .g{width:.6rem; height:.6rem; border-radius:50%; background:#5FD08A}

/* ---------- section frame ---------- */
.section{padding:clamp(3rem,7vw,5rem) 0}
.section.warm{background:var(--paper-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
.s-head{max-width:640px; margin-bottom:2.2rem}
.s-kicker{color:var(--ember-deep); font-weight:700; font-size:.86rem; letter-spacing:.02em; margin-bottom:.6rem}
.s-head h2{font-size:clamp(1.9rem,3.8vw,2.6rem)}
.s-head p{color:var(--ink-2); margin-top:.7rem; font-size:1.07rem}

/* ---------- SIGNATURE: symptom triage ---------- */
.triage{display:grid; grid-template-columns:repeat(3,1fr); gap:1rem}
.tri{background:#fff; border:1px solid var(--line); border-radius:var(--r-lg); overflow:hidden; box-shadow:var(--shadow-sm); transition:border-color .15s}
.tri[open]{border-color:var(--flame)}
.tri summary{list-style:none; cursor:pointer; padding:1.3rem 1.3rem; display:flex; align-items:flex-start; gap:.9rem}
.tri summary::-webkit-details-marker{display:none}
.tri .ico{width:44px; height:44px; flex:none; border-radius:10px; background:var(--flame-tint); color:var(--flame-deep); display:flex; align-items:center; justify-content:center}
.tri .ico svg{width:24px; height:24px}
.tri .lbl{flex:1}
.tri .lbl b{font-family:var(--display); font-size:1.16rem; font-weight:700; display:block; line-height:1.15}
.tri .lbl .hint{font-size:.88rem; color:var(--muted); margin-top:.25rem}
.tri .caret{color:var(--muted); transition:transform .2s var(--ease); margin-top:.35rem}
.tri[open] .caret{transform:rotate(180deg); color:var(--flame)}
.tri .body{padding:0 1.3rem 1.35rem 4.2rem}
.tri .body .row{display:flex; gap:.6rem; font-size:.95rem; color:var(--ink-2); padding:.45rem 0; border-top:1px dashed var(--line-2)}
.tri .body .row .k{color:var(--flame-deep); font-weight:600; min-width:82px; flex:none}
.tri .body .price{color:var(--ink); font-weight:600}
.tri .body .go{margin-top:.9rem; display:inline-flex}

/* ---------- same-day ribbon ---------- */
.ribbon{background:var(--flame); color:#fff}
.ribbon .wrap{display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:1rem 2rem; padding:1.3rem 22px}
.ribbon .lead{display:flex; align-items:center; gap:.8rem; font-family:var(--display); font-size:1.2rem; font-weight:700}
.ribbon .lead svg{width:1.7rem; height:1.7rem; flex:none; color:#FFD9BE}
.ribbon .makes{display:flex; flex-wrap:wrap; gap:.5rem 1.3rem; font-size:.92rem; color:rgba(255,255,255,.85); font-weight:500}
.ribbon .makes span{position:relative}

/* ---------- reviews ---------- */
.rev-top{display:flex; flex-wrap:wrap; align-items:center; gap:.8rem 1.4rem; margin-bottom:1.8rem}
.rev-score{display:flex; align-items:baseline; gap:.6rem}
.rev-score b{font-family:var(--display); font-size:2.6rem; line-height:1; font-weight:700}
.rev-score .of{color:var(--muted); font-size:.95rem}
.reviews{columns:3; column-gap:1.1rem}
.review{break-inside:avoid; background:#fff; border:1px solid var(--line); border-radius:var(--r-lg); padding:1.3rem; margin-bottom:1.1rem; box-shadow:var(--shadow-sm)}
.review .stars{font-size:.95rem}
.review p{margin-top:.6rem; color:var(--ink-2); font-size:.98rem}
.review .by{margin-top:.9rem; font-weight:600; font-size:.92rem; color:var(--ink); display:flex; align-items:center; gap:.5rem}
.review .by .gg{width:1rem; height:1rem}

/* ---------- services ---------- */
.svc{display:flex; flex-direction:column; border-top:2px solid var(--ink)}
.svc-row{display:grid; grid-template-columns:auto 1fr auto; gap:1.4rem; align-items:start; padding:1.6rem 0; border-bottom:1px solid var(--line)}
.svc-row .n{font-family:var(--display); font-weight:700; color:var(--ember); font-size:1.05rem; width:2.2rem}
.svc-row h3{font-size:1.4rem; margin-bottom:.4rem}
.svc-row p{color:var(--ink-2); font-size:1rem; max-width:60ch}
.svc-row .price{text-align:right; white-space:nowrap}
.svc-row .price .from{display:block; font-size:.78rem; color:var(--muted); text-transform:uppercase; letter-spacing:.05em}
.svc-row .price .amt{font-family:var(--display); font-weight:700; font-size:1.35rem; color:var(--flame-deep)}

/* ---------- trust strip ---------- */
.trust-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:1rem}
.trust-cell{background:#fff; border:1px solid var(--line); border-radius:var(--r-lg); padding:1.4rem; box-shadow:var(--shadow-sm)}
.trust-cell svg{width:1.9rem; height:1.9rem; color:var(--flame); margin-bottom:.7rem}
.trust-cell b{font-family:var(--display); font-size:1.12rem; display:block}
.trust-cell p{color:var(--ink-2); font-size:.92rem; margin-top:.3rem}

/* ---------- service area ---------- */
.area-grid{display:grid; grid-template-columns:1fr 1fr; gap:2.2rem; align-items:center}
.area-list{display:flex; flex-wrap:wrap; gap:.55rem}
.area-list span{background:#fff; border:1px solid var(--line-2); border-radius:100px; padding:.4rem .9rem; font-size:.9rem; color:var(--ink-2); font-weight:500}

/* ---------- contact / callout ---------- */
.contact-grid{display:grid; grid-template-columns:.9fr 1.1fr; gap:2.4rem}
.contact-info h2{font-size:clamp(1.9rem,3.6vw,2.5rem)}
.contact-info .lead{color:var(--ink-2); margin-top:.8rem; font-size:1.08rem}
.cinfo{margin-top:1.6rem; display:flex; flex-direction:column; gap:1rem}
.cinfo a, .cinfo div{display:flex; align-items:center; gap:.85rem; color:var(--ink); text-decoration:none; font-weight:500}
.cinfo svg{width:1.3rem; height:1.3rem; color:var(--flame); flex:none}
.cinfo .big{font-family:var(--display); font-weight:700; font-size:1.35rem}
.callout{background:#fff; border:1px solid var(--line); border-radius:var(--r-lg); padding:1.7rem; box-shadow:var(--shadow)}
.callout h3{font-size:1.3rem; margin-bottom:1.1rem}
.field{margin-bottom:.95rem}
.field label{display:block; font-size:.86rem; font-weight:600; color:var(--ink-2); margin-bottom:.35rem}
.field input, .field select, .field textarea{width:100%; font-family:var(--body); font-size:1rem; padding:.75rem .85rem; border:1px solid var(--line-2); border-radius:var(--r); background:var(--paper); color:var(--ink)}
.field input:focus, .field select:focus, .field textarea:focus{outline:2px solid var(--flame); border-color:var(--flame)}
.callout .btn-call{width:100%; justify-content:center; margin-top:.4rem}
.callout .fine{font-size:.82rem; color:var(--muted); margin-top:.8rem; text-align:center}

/* ---------- footer ---------- */
.foot{background:var(--ink); color:rgba(255,255,255,.7); padding:2.6rem 0 1.4rem}
.foot .cols{display:grid; grid-template-columns:1.6fr 1fr 1fr; gap:2rem}
.foot .brand b{color:#fff}
.foot .brand span{color:rgba(255,255,255,.55)}
.foot h4{color:#fff; font-family:var(--body); font-size:.8rem; letter-spacing:.12em; text-transform:uppercase; margin-bottom:.9rem}
.foot a{color:rgba(255,255,255,.7); text-decoration:none; display:block; margin-bottom:.5rem; font-size:.94rem}
.foot a:hover{color:#fff}
.foot .about{font-size:.94rem; max-width:36ch; margin-top:.9rem}
.foot .fine{border-top:1px solid rgba(255,255,255,.14); margin-top:2rem; padding-top:1.2rem; display:flex; flex-wrap:wrap; justify-content:space-between; gap:.6rem; font-size:.82rem; color:rgba(255,255,255,.5)}

/* ---------- sticky mobile call bar ---------- */
.callbar{position:fixed; left:0; right:0; bottom:0; z-index:120; display:none; gap:.6rem; padding:.6rem; background:rgba(250,249,247,.96); backdrop-filter:blur(8px); border-top:1px solid var(--line)}
.callbar .btn{flex:1; justify-content:center}

/* ---------- reveal ---------- */
.js .rv{opacity:0; transform:translateY(20px)}
.js .rv.in{opacity:1; transform:none; transition:opacity .7s var(--ease), transform .7s var(--ease)}
@media (prefers-reduced-motion:reduce){ .js .rv{opacity:1; transform:none} }

/* ---------- responsive ---------- */
@media (max-width:940px){
  .hero-grid{grid-template-columns:1fr}
  .hero-card{order:-1; max-width:420px}
  .triage{grid-template-columns:1fr 1fr}
  .reviews{columns:2}
  .trust-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .area-grid{grid-template-columns:1fr; gap:1.4rem}
  .foot .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:16px}
  .nav{display:none; position:absolute; top:70px; left:0; right:0; flex-direction:column; align-items:flex-start; gap:0; background:var(--paper); border-bottom:1px solid var(--line); padding:.5rem 22px 1rem}
  .nav.open{display:flex}
  .nav a.link{padding:.7rem 0; width:100%; border-bottom:1px solid var(--line)}
  .head-call .head-num{display:none}
  .navtoggle{display:flex}
  .triage{grid-template-columns:1fr}
  .tri .body{padding-left:1.3rem}
  .reviews{columns:1}
  .trust-grid{grid-template-columns:1fr}
  .svc-row{grid-template-columns:auto 1fr; gap:.8rem 1rem}
  .svc-row .price{grid-column:2; text-align:left; margin-top:.4rem}
  .foot .cols{grid-template-columns:1fr}
  .callbar{display:flex}
  body{padding-bottom:70px}
  .ribbon .wrap{flex-direction:column; align-items:flex-start}
}