/* ===========================================================
   Gus - stylesheet
   Warm industrial identity for UK heating engineers.
   Palette: paper, pilot-flame orange, boiler-casing steel.
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800&family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,900&display=swap');

:root{
  --ink:#1A1C1A;
  --ink-soft:#3E423E;
  --paper:#F3EFE6;
  --paper-deep:#E9E3D5;
  --flame:#E2562B;
  --flame-deep:#C0411D;
  --copper:#B07A3C;
  --steel:#2C3A3F;
  --steel-soft:#3C4D53;
  --line:#D4CCBC;
  --good:#2E7D55;
  --radius:14px;
  --maxw:1180px;
  --font-display:"Fraunces", serif;
  --font-body:"Hanken Grotesk", system-ui, sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3{font-family:var(--font-display);font-weight:600;line-height:1.05;letter-spacing:-0.01em}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;background:var(--flame);color:#fff;border:none;padding:13px 24px;border-radius:100px;font-family:var(--font-body);font-weight:600;font-size:15px;cursor:pointer;text-decoration:none;transition:transform .14s, background .18s, box-shadow .18s}
.btn:hover{background:var(--flame-deep);transform:translateY(-2px);box-shadow:0 12px 24px -10px rgba(226,86,43,.6)}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--paper);box-shadow:none}
.btn.big{padding:16px 32px;font-size:17px}
.btn .arrow{transition:transform .18s}
.btn:hover .arrow{transform:translateX(3px)}

/* ===================== NAV ===================== */
nav{position:sticky;top:0;z-index:60;background:rgba(243,239,230,.82);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .2s, background .2s}
nav.scrolled{border-bottom-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:600;font-size:25px;letter-spacing:-0.02em;text-decoration:none;color:var(--ink)}
.flame-mark{width:27px;height:27px}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a:not(.btn){color:var(--ink-soft);text-decoration:none;font-size:15px;font-weight:500;transition:color .15s;position:relative}
.nav-links a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-4px;height:2px;width:0;background:var(--flame);transition:width .22s}
.nav-links a:not(.btn):hover{color:var(--ink)}
.nav-links a:not(.btn):hover::after{width:100%}
@media(max-width:780px){.nav-links a:not(.btn){display:none}}

/* ===================== HERO ===================== */
.hero{position:relative;padding:84px 0 76px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.5}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:50px;align-items:center}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr;gap:40px}}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--flame-deep);background:#fff;border:1px solid var(--line);padding:8px 15px;border-radius:100px;margin-bottom:24px}
.dot{width:7px;height:7px;border-radius:50%;background:var(--flame);box-shadow:0 0 0 0 rgba(226,86,43,.5);animation:pulse 2.2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(226,86,43,.5)}70%{box-shadow:0 0 0 11px rgba(226,86,43,0)}100%{box-shadow:0 0 0 0 rgba(226,86,43,0)}}
h1.hero-title{font-size:clamp(42px,6.2vw,72px);font-weight:600}
h1.hero-title .accent{color:var(--flame);font-style:italic}
.hero-sub{font-size:19px;color:var(--ink-soft);margin:24px 0 34px;max-width:31em}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.trust{margin-top:32px;font-size:14px;color:var(--ink-soft);display:flex;align-items:center;gap:10px}
.trust strong{color:var(--ink)}

/* hero reveal words */
.line-mask{overflow:hidden;display:block}
.line-mask span{display:block;transform:translateY(100%);animation:lineUp .9s cubic-bezier(.2,.7,.2,1) forwards}
.line-mask:nth-child(2) span{animation-delay:.09s}
.line-mask:nth-child(3) span{animation-delay:.18s}
@keyframes lineUp{to{transform:translateY(0)}}
.fade-up{opacity:0;transform:translateY(16px);animation:fadeUp .8s ease forwards}
.d1{animation-delay:.35s}.d2{animation-delay:.5s}.d3{animation-delay:.62s}
@keyframes fadeUp{to{opacity:1;transform:none}}

/* hero phone */
.phone-wrap{perspective:1400px}
.phone{position:relative;width:300px;margin:0 auto;background:var(--ink);border-radius:40px;padding:13px;box-shadow:0 40px 70px -24px rgba(26,28,26,.5);border:1px solid #000;transform:rotateY(-12deg) rotateX(4deg);transition:transform .5s ease}
.phone-wrap:hover .phone{transform:rotateY(-4deg) rotateX(1deg)}
.phone-screen{background:var(--paper);border-radius:28px;overflow:hidden;height:610px;position:relative}
.ps-top{background:var(--steel);color:#fff;padding:20px 18px 17px}
.ps-top .small{font-size:12px;opacity:.7;letter-spacing:.04em;text-transform:uppercase}
.ps-top .addr{font-family:var(--font-display);font-size:20px;margin-top:3px}
.ps-chip{display:inline-block;background:var(--flame);color:#fff;font-size:11px;font-weight:700;padding:5px 10px;border-radius:6px;margin-top:12px;letter-spacing:.02em}
.ps-body{padding:16px}
.ps-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:11px;opacity:0;transform:translateY(10px);animation:fadeUp .6s ease forwards}
.ps-body .ps-card:nth-child(1){animation-delay:.7s}
.ps-body .ps-card:nth-child(2){animation-delay:.85s}
.ps-body .ps-card:nth-child(3){animation-delay:1s}
.ps-body .ps-card:nth-child(4){animation-delay:1.15s}
.ps-card .lbl{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--copper);font-weight:700}
.ps-card .val{font-size:15px;font-weight:600;margin-top:2px}
.ps-money{background:#10241B;border:none}
.ps-money .lbl{color:#7BE0AB}
.ps-money .val{color:#7BE0AB;font-size:22px;font-family:var(--font-display)}
.ps-script{background:var(--paper-deep);border:1px dashed var(--copper)}
.ps-script .val{font-size:13px;font-weight:500;font-style:italic;color:var(--ink-soft);line-height:1.45}

/* ===================== SECTION BASE ===================== */
section{padding:88px 0}
.sec-eyebrow{font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--flame-deep);margin-bottom:15px}
.sec-title{font-size:clamp(31px,4.5vw,48px);max-width:16em}
.sec-lead{font-size:18px;color:var(--ink-soft);max-width:35em;margin-top:17px}

/* ===================== PROBLEM ===================== */
.problem{background:var(--steel);color:var(--paper)}
.problem .sec-eyebrow{color:#E9A586}
.problem .sec-title{color:#fff}
.problem .sec-lead{color:rgba(243,239,230,.72)}
.prob-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:50px}
@media(max-width:860px){.prob-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.prob-grid{grid-template-columns:1fr}}
.prob-card{background:var(--steel-soft);border:1px solid rgba(255,255,255,.09);border-radius:var(--radius);padding:28px 22px;position:relative;overflow:hidden}
.prob-num{font-family:var(--font-display);font-size:48px;color:rgba(255,255,255,.16);line-height:1;font-weight:600}
.prob-card h3{font-size:20px;color:#fff;margin:8px 0 8px}
.prob-card p{font-size:14.5px;color:rgba(243,239,230,.72)}
.prob-card.loss{background:linear-gradient(160deg,#3a1d12,#2a1109);border-color:rgba(226,86,43,.3)}
.prob-card.loss .prob-num{color:rgba(226,86,43,.4)}

/* ===================== HOW ===================== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:56px}
@media(max-width:820px){.steps{grid-template-columns:1fr}}
.step{position:relative;padding-top:30px}
.step-rule{height:3px;background:var(--line);border-radius:3px;position:relative;margin-bottom:24px}
.step-rule i{position:absolute;left:0;top:0;height:3px;width:0;background:var(--flame);border-radius:3px;transition:width .8s ease}
.step.in .step-rule i{width:40px}
.step .when{font-weight:700;font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--flame-deep)}
.step h3{font-size:24px;margin:8px 0 11px}
.step p{color:var(--ink-soft);font-size:15.5px}

/* ===================== PROOF STRIP ===================== */
.proof{background:var(--paper-deep);padding:70px 0}
.proof-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:10px}
@media(max-width:760px){.proof-grid{grid-template-columns:1fr}}
.proof-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;text-align:center}
.proof-num{font-family:var(--font-display);font-size:54px;color:var(--flame);line-height:1;font-weight:600}
.proof-card .proof-lbl{font-size:15px;color:var(--ink-soft);margin-top:12px}

/* ===================== QUOTE ===================== */
.quote{background:var(--ink);color:var(--paper)}
.quote blockquote{font-family:var(--font-display);font-size:clamp(26px,3.6vw,40px);line-height:1.25;max-width:18em;font-weight:500}
.quote .by{margin-top:26px;font-size:15px;color:rgba(243,239,230,.6)}
.quote .by strong{color:#E9A586}

/* ===================== CTA BAND ===================== */
.cta-band{background:var(--flame);color:#fff;text-align:center}
.cta-band h2{font-size:clamp(31px,4.6vw,50px);color:#fff;max-width:15em;margin:0 auto}
.cta-band p{font-size:18px;color:rgba(255,255,255,.92);margin:18px auto 32px;max-width:31em}
.cta-band .btn{background:#fff;color:var(--flame-deep)}
.cta-band .btn:hover{background:var(--ink);color:#fff;box-shadow:0 12px 24px -10px rgba(0,0,0,.4)}

/* ===================== FOOTER ===================== */
footer{background:var(--ink);color:rgba(243,239,230,.6);padding:56px 0 40px}
.foot-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:32px}
.foot-brand{max-width:24em}
.foot-brand .logo{color:#fff;margin-bottom:13px}
.foot-brand p{font-size:14.5px}
.foot-cols{display:flex;gap:60px;flex-wrap:wrap}
.foot-col h4{color:#fff;font-family:var(--font-body);font-size:13px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px}
.foot-col a{display:block;color:rgba(243,239,230,.6);text-decoration:none;font-size:14.5px;padding:5px 0;transition:color .15s}
.foot-col a:hover{color:var(--flame)}
.foot-base{margin-top:42px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:rgba(243,239,230,.4)}

/* ===================== SCROLL REVEAL ===================== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .75s ease, transform .75s ease}
.reveal.in{opacity:1;transform:none}

/* ===================== CAL MODAL ===================== */
.modal-overlay{position:fixed;inset:0;background:rgba(26,28,26,.55);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;pointer-events:none;transition:opacity .25s}
.modal-overlay.open{opacity:1;pointer-events:auto}
.modal{background:var(--paper);border-radius:18px;width:100%;max-width:1000px;height:84vh;overflow:hidden;position:relative;transform:scale(.96);transition:transform .25s;box-shadow:0 40px 90px -30px rgba(0,0,0,.6)}
.modal-overlay.open .modal{transform:scale(1)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line)}
.modal-head .logo{font-size:20px}
.modal-close{background:none;border:none;cursor:pointer;width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:background .15s;font-size:20px;color:var(--ink-soft)}
.modal-close:hover{background:var(--paper-deep)}
.modal iframe{width:100%;height:calc(84vh - 64px);border:none}

@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  .line-mask span{transform:none}
  .fade-up,.ps-card{opacity:1;transform:none}
}