/* ============================================
   Energy Experts — Design system
   Bush #0B2A1E · Field #7FA30D · Kowhai #F0C01C
   Ember #DB8209 · Steel #898B90 · Pumice #EFEBDD
   ============================================ */

:root{
  --bush:#0B2A1E;
  --bush-700:#143828;
  --bush-600:#1C4936;
  --field:#7FA30D;
  --field-700:#5C7A0A;
  --field-tint:#EAF0D6;
  --kowhai:#F0C01C;
  --kowhai-700:#C99A12;
  --ember:#DB8209;
  --steel:#898B90;
  --steel-tint:#DEDBCF;
  --pumice:#EFEBDD;
  --paper:#FAF8F0;
  --ink:#13241B;
  --ink-muted:#54614F;
  --ink-on-dark:#EFEBDD;
  --ink-on-dark-muted:#AAB8AB;
  --white:#FFFFFF;

  --font-display:'Archivo','Work Sans',sans-serif;
  --font-body:'Work Sans',sans-serif;
  --font-mono:'IBM Plex Mono',monospace;

  --container:1180px;
  --radius-s:6px;
  --radius-m:10px;
  --radius-l:18px;
  --shadow-card:0 1px 2px rgba(11,42,30,0.06), 0 8px 24px rgba(11,42,30,0.07);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--pumice);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}

img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.08;
  letter-spacing:-0.01em;
  margin:0 0 0.5em;
  color:var(--bush);
}
h1{font-size:clamp(2.4rem, 5vw, 4.2rem);}
h2{font-size:clamp(1.9rem, 3.4vw, 2.7rem);}
h3{font-size:1.3rem; letter-spacing:0;}
h4{font-size:1.05rem; letter-spacing:0;}

p{margin:0 0 1em; color:var(--ink-muted); max-width:62ch;}
.lede{font-size:1.2rem; color:var(--ink-muted);}

@media (max-width:880px) {
  .hero .container:first-child {
    grid-template-columns: 1fr;
  }
  .hero .container:first-child > div:last-child {
    display: none;
  }
}

.eyebrow{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--field-700);
  display:inline-flex;
  align-items:center;
  gap:0.5em;
  margin-bottom:0.9em;
}
.eyebrow::before{
  content:'';
  width:18px; height:2px;
  background:var(--kowhai);
  display:inline-block;
}

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 1.5rem;
}

section{padding:5.5rem 0;}
@media (max-width:720px){ section{padding:3.5rem 0;} }

.section-dark{background:var(--bush); color:var(--ink-on-dark);}
.section-dark h2, .section-dark h3, .section-dark h4{color:var(--ink-on-dark);}
.section-dark p{color:var(--ink-on-dark-muted);}

.section-paper{background:var(--paper);}
.section-tint{background:var(--field-tint);}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  gap:0.5em;
  font-family:var(--font-body);
  font-weight:600;
  font-size:0.97rem;
  padding:0.85em 1.6em;
  border-radius:999px;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:active{transform:scale(0.97);}
.btn-primary{background:var(--kowhai); color:var(--bush);}
.btn-primary:hover{background:var(--ember); color:var(--white);}
.btn-outline{border-color:currentColor; color:var(--bush); background:transparent;}
.btn-outline:hover{background:var(--bush); color:var(--ink-on-dark); border-color:var(--bush);}
.section-dark .btn-outline{color:var(--ink-on-dark);}
.section-dark .btn-outline:hover{background:var(--ink-on-dark); color:var(--bush);}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible{
  outline:2.5px solid var(--kowhai);
  outline-offset:3px;
  border-radius:4px;
}

/* Header */
.site-header{
  position:sticky; top:0; z-index:50;
  background:#FFFFFF;
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--steel-tint);
}
.header-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:0.9rem 1.5rem;
  max-width:var(--container); margin:0 auto;
}
.brand{display:flex; align-items:center; gap:1.65rem; font-family:var(--font-display); font-weight:800; font-size:1.05rem; color:var(--bush);}
.brand img{width:60px; height:auto;}
.brand span small{display:block; font-family:var(--font-mono); font-weight:400; font-size:0.6rem; letter-spacing:0.08em; color:var(--field-700); text-transform:uppercase;}

.main-nav{display:flex; align-items:center; gap:2.2rem;}
.main-nav ul{display:flex; gap:1.8rem; list-style:none; margin:0; padding:0;}
.main-nav a{font-weight:500; font-size:0.95rem; color:var(--ink); position:relative;}
.main-nav a[aria-current="page"]{color:var(--field-700);}
.main-nav a:hover{color:var(--field-700);}

.nav-toggle{display:none; background:none; border:none; cursor:pointer; padding:0.4rem;}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  display:block; width:22px; height:2px; background:var(--bush); position:relative; transition:0.2s;
}
.nav-toggle span::before, .nav-toggle span::after{content:''; position:absolute;}
.nav-toggle span::before{top:-7px;}
.nav-toggle span::after{top:7px;}

@media (max-width:880px){
  .main-nav{
    position:fixed; inset:64px 0 0 0; background:var(--paper);
    flex-direction:column; align-items:flex-start; padding:1.5rem;
    gap:1.5rem; transform:translateY(-110%); transition:transform 0.25s ease;
    overflow-y:auto;
  }
  .main-nav.is-open{transform:translateY(0);}
  .main-nav ul{flex-direction:column; gap:1.1rem;}
  .main-nav ul a{font-size:1.15rem;}
  .nav-toggle{display:block;}
}

/* Footer */
.site-footer{background:var(--bush); color:var(--ink-on-dark-muted); padding:4rem 0 2rem;}
.footer-grid{display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:2.5rem;}
.site-footer h4{color:var(--ink-on-dark); font-size:0.95rem; margin-bottom:1em;}
.site-footer ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:0.6em;}
.site-footer a:hover{color:var(--kowhai);}
.footer-bottom{
  max-width:var(--container); margin:3rem auto 0; padding:1.5rem 1.5rem 0;
  border-top:1px solid rgba(239,235,221,0.12);
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:1rem;
  font-size:0.85rem;
}
@media (max-width:760px){ .footer-grid{grid-template-columns:1fr 1fr;} }
@media (max-width:480px){ .footer-grid{grid-template-columns:1fr;} }

/* Cards */
.card{
  background:var(--paper);
  border-radius:var(--radius-l);
  padding:1.9rem;
  box-shadow:var(--shadow-card);
  border:1px solid rgba(11,42,30,0.05);
}
.card-icon{
  width:46px; height:46px;
  border-radius:var(--radius-m);
  background:var(--field-tint);
  color:var(--field-700);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:1.1rem;
}
.card-icon svg{width:24px; height:24px;}

.grid{display:grid; gap:1.6rem;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-5{grid-template-columns:repeat(5,1fr);}
@media (max-width:980px){ .grid-3,.grid-5{grid-template-columns:repeat(2,1fr);} }
@media (max-width:620px){ .grid-2,.grid-3,.grid-5{grid-template-columns:1fr;} }

/* Energy flow line — signature motif */
.flow{padding:1rem 0;}
.flow svg{width:100%; height:auto; overflow:visible;}
.flow-path{
  fill:none; stroke:var(--white); stroke-width:3; stroke-linecap:round;
  stroke-dasharray:10 8;
}
.flow .node-bg{fill:var(--bush-700);}
.flow .node-label{
  font-family:var(--font-mono); font-size:11px; fill:var(--ink-on-dark-muted);
  text-anchor:middle; text-transform:uppercase; letter-spacing:0.05em;
}
@media (prefers-reduced-motion: no-preference){
  .flow-path{ animation:flowdash 1.6s linear infinite; }
}
@keyframes flowdash{ to{ stroke-dashoffset:-36; } }

/* Stats */
.stat{text-align:left;}
.stat .num{font-family:var(--font-mono); font-size:2.1rem; font-weight:500; color:var(--kowhai); display:block;}
.stat .label{font-size:0.85rem; color:var(--ink-on-dark-muted);}

/* Hero */
.hero{
  background:var(--bush);
  color:var(--ink-on-dark);
  padding:5rem 0 3.5rem;
  position:relative;
  overflow:hidden;
}
.hero h1{color:var(--ink-on-dark);}
.hero .lede{color:var(--ink-on-dark-muted); max-width:46ch;}
.hero-actions{display:flex; gap:1rem; margin:2rem 0; flex-wrap:wrap;}
.hero-stats{display:flex; gap:2.6rem; margin-top:2.5rem; flex-wrap:wrap;}

/* Page hero (secondary pages) */
.page-hero{background:var(--bush); color:var(--ink-on-dark); padding:4.5rem 0 3rem;}
.page-hero h1{color:var(--ink-on-dark);}
.page-hero p{color:var(--ink-on-dark-muted);}

/* Service detail rows */
.service-row{display:grid; grid-template-columns:0.9fr 1.1fr; gap:3rem; align-items:center; padding:3.4rem 0; border-bottom:1px solid var(--steel-tint);}
.service-row:last-child{border-bottom:none;}
.service-row.is-reverse .service-visual{order:2;}
.service-visual{
  background:var(--bush); border-radius:var(--radius-l); aspect-ratio:4/3;
  display:flex; align-items:center; justify-content:center; position:relative; overflow:hidden;
}
.feature-list{list-style:none; margin:1.2rem 0 0; padding:0; display:flex; flex-direction:column; gap:0.7em;}
.feature-list li{display:flex; gap:0.7em; align-items:flex-start; color:var(--ink-muted); font-size:0.97rem;}
.feature-list svg{flex-shrink:0; margin-top:3px; width:18px; height:18px; color:var(--field-700);}
@media (max-width:840px){
  .service-row{grid-template-columns:1fr; gap:1.6rem;}
  .service-row.is-reverse .service-visual{order:0;}
}

/* Process steps */
.steps{display:grid; gap:2rem; grid-template-columns:repeat(4,1fr); counter-reset:step;}
.step{
  position:relative;
  padding-top:1.2rem;
  border-top:2px solid var(--steel);
}
.step::before{
  counter-increment:step;
  content:counter(step,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:0.85rem;
  color:var(--kowhai);
  display:block;
  margin-bottom:0.75rem;
}
.step::after{ display:none; }
@media (max-width:900px){ .steps{grid-template-columns:repeat(2,1fr);} }
@media (max-width:560px){ .steps{grid-template-columns:1fr;} }

/* Values */
.value{padding:1.6rem 0; border-top:1px solid var(--steel-tint);}
.value:first-child{border-top:none;}

/* CTA band */
.cta-band{
  background:var(--field);
  color:var(--bush);
  border-radius:var(--radius-l);
  padding:3rem;
  display:flex; align-items:center; justify-content:space-between; gap:2rem; flex-wrap:wrap;
}
.cta-band h2{color:var(--bush); margin-bottom:0.3em;}
.cta-band p{color:var(--bush-700); margin-bottom:0;}
.cta-band .btn-primary{background:var(--bush); color:var(--ink-on-dark);}
.cta-band .btn-primary:hover{background:var(--ink); color:var(--white);}

/* Contact page */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:3.5rem;}
.field-group{margin-bottom:1.3rem;}
.field-group label{display:block; font-size:0.85rem; font-weight:600; color:var(--bush); margin-bottom:0.4em;}
.field-group input, .field-group select, .field-group textarea{
  width:100%; padding:0.75em 0.9em; border-radius:var(--radius-s);
  border:1.5px solid var(--steel-tint); background:var(--paper); font-family:var(--font-body);
  font-size:0.97rem; color:var(--ink);
}
.field-group textarea{resize:vertical; min-height:120px;}
.contact-info-item{display:flex; gap:1rem; align-items:flex-start; padding:1.1rem 0; border-top:1px solid var(--steel-tint);}
.contact-info-item:first-child{border-top:none;}
.contact-info-item svg{width:22px; height:22px; color:var(--field-700); flex-shrink:0; margin-top:2px;}
@media (max-width:840px){ .contact-grid{grid-template-columns:1fr;} }

.badge-row{display:flex; gap:1.4rem; flex-wrap:wrap; align-items:center;}
.badge-pill{
  display:inline-flex; align-items:center; gap:0.5em; font-family:var(--font-mono);
  font-size:0.78rem; letter-spacing:0.04em; padding:0.5em 0.9em; border-radius:999px;
  border:1px solid var(--steel-tint); color:var(--ink-muted);
}

/* =============================================
   Hero illustration — sun → panels → house
   ============================================= */
.ha-sun-rays  { animation:ha-ray-pulse 2s ease-in-out infinite; }
.ha-sun-halo  { animation:ha-halo 2.5s ease-in-out infinite; }
.ha-beam      { opacity:0; stroke-dasharray:10 7; animation:ha-beam-flow 5s linear infinite; }
.ha-panel-glow{ opacity:0; animation:ha-panel-glow 5s ease-in-out infinite; }
.ha-wire      { opacity:0; stroke-dasharray:8 5;  animation:ha-wire-flow 5s linear infinite; }
.ha-bolt      { opacity:0; animation:ha-bolt-flash 5s ease-in-out infinite; }
.ha-win       { animation:ha-win-light 5s ease-in-out infinite; }
.ha-house-glow{ opacity:0; animation:ha-house-glow 5s ease-in-out infinite; }

@keyframes ha-ray-pulse  { 0%,100%{ opacity:.5; } 50%{ opacity:1; } }
@keyframes ha-halo       { 0%,100%{ opacity:.12; } 50%{ opacity:.28; } }

@keyframes ha-beam-flow  {
  0%,10%  { opacity:0;  stroke-dashoffset:140; }
  18%     { opacity:.8; stroke-dashoffset:140; }
  45%     { opacity:.8; stroke-dashoffset:0;   }
  55%     { opacity:0;                         }
  100%    { opacity:0;  stroke-dashoffset:0;   }
}
@keyframes ha-panel-glow {
  0%,40%  { opacity:0;   }
  52%     { opacity:.55; }
  68%     { opacity:.55; }
  78%,100%{ opacity:0;   }
}
@keyframes ha-wire-flow  {
  0%,55%  { opacity:0; stroke-dashoffset:80; }
  62%     { opacity:1; stroke-dashoffset:80; }
  78%     { opacity:1; stroke-dashoffset:0;  }
  86%,100%{ opacity:0;                       }
}
@keyframes ha-bolt-flash {
  0%,56%  { opacity:0; }
  64%     { opacity:1; }
  79%     { opacity:1; }
  86%,100%{ opacity:0; }
}
@keyframes ha-win-light  {
  0%,72%  { fill:#143828; }
  82%     { fill:#F0C01C; }
  93%     { fill:#F0C01C; }
  99%,100%{ fill:#143828; }
}
@keyframes ha-house-glow {
  0%,72%  { opacity:0;   }
  84%     { opacity:.12; }
  93%     { opacity:.12; }
  100%    { opacity:0;   }
}