/* ============================================
   AC ENERGIES — design tokens
   Ink from the wordmark's "A", teal current from the "C",
   amber for the gas/solar warmth side of the business.
   ============================================ */
:root{
  --ink:        #17191b;
  --ink-soft:   #2b2e31;
  --paper:      #f5f4ef;
  --paper-dim:  #eae8e0;
  --white:      #ffffff;
  --teal-deep:  #0a4f4d;
  --teal:       #0f6e6a;
  --teal-bright:#1fb8a6;
  --amber:      #e2a13d;
  --amber-deep: #b97a1f;
  --line:       rgba(23,25,27,0.12);
  --line-soft:  rgba(245,244,239,0.16);

  --display: 'Space Grotesk', sans-serif;
  --body:    'Inter', sans-serif;
  --mono:    'IBM Plex Mono', monospace;

  --container: 1180px;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  font-family:var(--body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }

.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

/* ---------- type ---------- */
h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:700;
  letter-spacing:-0.01em;
  line-height:1.08;
}
h1{ font-size:clamp(2.6rem, 5.4vw, 4.6rem); }
h2{ font-size:clamp(1.9rem, 3.4vw, 2.7rem); }
h3{ font-size:1.3rem; }
.eyebrow{
  font-family:var(--mono);
  font-size:0.78rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--teal);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:20px; height:2px;
  background:var(--amber);
  display:inline-block;
}
p{ color:var(--ink-soft); }
.lede{
  font-size:1.15rem;
  color:var(--ink-soft);
  max-width:56ch;
}

/* ---------- nav ---------- */
header{
  position:sticky; top:0; z-index:50;
  background:var(--ink);
  border-bottom:1px solid var(--line-soft);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 32px;
  max-width:var(--container);
  margin:0 auto;
}
.nav-logo{ display:flex; align-items:center; gap:12px; }
.nav-logo img{ height:52px; width:auto; }
.nav-logo span{
  font-family:var(--mono);
  font-size:0.82rem;
  letter-spacing:0.12em;
  color:var(--paper-dim);
  text-transform:uppercase;
}
.nav-links{
  display:flex; gap:36px;
  font-family:var(--mono);
  font-size:0.82rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
}
.nav-links a{
  color:var(--paper-dim);
  position:relative;
  padding-bottom:4px;
  transition:color .2s;
}
.nav-links a:hover, .nav-links a[aria-current="page"]{ color:var(--white); }
.nav-links a[aria-current="page"]::after{
  content:"";
  position:absolute; left:0; right:0; bottom:-2px;
  height:2px;
  background:linear-gradient(90deg,var(--teal-bright),var(--amber));
}
.nav-cta{
  font-family:var(--mono);
  font-size:0.78rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--ink);
  background:var(--teal-bright);
  padding:9px 18px;
  border-radius:2px;
  transition:background .2s, transform .2s;
}
.nav-cta:hover{ background:var(--white); }
.nav-toggle{ display:none; }

@media (max-width:820px){
  .nav-links{ display:none; }
  .nav-toggle{
    display:block; background:none; border:none;
    color:var(--paper-dim); font-family:var(--mono); font-size:0.8rem;
    letter-spacing:0.08em; text-transform:uppercase; cursor:pointer;
  }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--mono);
  font-size:0.85rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  padding:14px 26px;
  border-radius:2px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, background .18s ease, border-color .18s ease;
}
.btn-primary{
  background:var(--ink);
  color:var(--paper);
}
.btn-primary:hover{ transform:translateY(-2px); background:var(--teal-deep); color:var(--white); }
.btn-outline{
  border-color:var(--ink);
  color:var(--ink);
}
.btn-outline:hover{ transform:translateY(-2px); background:var(--ink); color:var(--paper); }
.btn-light{
  border-color:var(--line-soft);
  color:var(--paper);
}
.btn-light:hover{ background:var(--paper); color:var(--ink); }

/* ---------- hero / current motif ---------- */
.hero{
  position:relative;
  background:var(--ink);
  color:var(--paper);
  overflow:hidden;
  padding:110px 0 90px;
}
.hero .wrap{ position:relative; z-index:2; }
.hero-grid{
  display:grid;
  grid-template-columns:1.2fr 0.8fr;
  gap:48px;
  align-items:center;
}
.hero-logo{
  display:flex; align-items:center; gap:16px;
  margin-bottom:32px;
}
.hero-logo img{ height:64px; width:auto; }
.hero-logo span{
  font-family:var(--display);
  font-weight:700;
  font-size:1.6rem;
  letter-spacing:-0.01em;
  color:var(--white);
  text-transform:uppercase;
}
.hero h1{ color:var(--white); margin-bottom:22px; }
.hero .lede{ color:var(--paper-dim); margin-bottom:34px; }
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }

.current-line{
  position:absolute;
  top:0; left:0; width:100%; height:100%;
  z-index:1;
  opacity:0.9;
}
.current-line path{
  fill:none;
  stroke-width:2.4;
}
.current-line .p1{ stroke:url(#gradTeal); }
.current-line .p2{ stroke:url(#gradAmber); opacity:0.55; }

@media (prefers-reduced-motion:no-preference){
  .current-dash{
    stroke-dasharray:14 10;
    animation:flow 6s linear infinite;
  }
}
@keyframes flow{ to{ stroke-dashoffset:-240; } }

.stat-row{
  display:flex; gap:0;
  margin-top:64px;
  border-top:1px solid var(--line-soft);
  padding-top:28px;
  flex-wrap:wrap;
}
.stat{
  flex:1 1 160px;
  padding-right:24px;
}
.stat .num{
  font-family:var(--display);
  font-size:2.1rem;
  font-weight:700;
  color:var(--teal-bright);
}
.stat .lbl{
  font-family:var(--mono);
  font-size:0.74rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--paper-dim);
  margin-top:4px;
}

/* ---------- sections ---------- */
section{ padding:96px 0; }
.section-tight{ padding:64px 0; }
.section-alt{ background:var(--white); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section-ink{ background:var(--ink); color:var(--paper); }
.section-ink p{ color:var(--paper-dim); }
.section-ink .eyebrow{ color:var(--teal-bright); }

.section-head{
  display:flex; justify-content:space-between; align-items:flex-end;
  gap:32px; margin-bottom:52px; flex-wrap:wrap;
}

/* ---------- three-strand service cards ---------- */
.strands{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.strand{
  background:var(--paper);
  padding:38px 32px;
  position:relative;
  transition:background .25s;
}
.strand:hover{ background:var(--white); }
.strand .tag{
  font-family:var(--mono);
  font-size:0.72rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--amber-deep);
  margin-bottom:18px;
  display:block;
}
.strand h3{ margin-bottom:12px; }
.strand p{ font-size:0.96rem; }
.strand-bar{
  position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--teal),var(--teal-bright));
}
.strand:nth-child(2) .strand-bar{ background:linear-gradient(90deg,var(--amber-deep),var(--amber)); }
.strand:nth-child(3) .strand-bar{ background:linear-gradient(90deg,var(--ink-soft),var(--teal)); }

@media (max-width:820px){
  .strands{ grid-template-columns:1fr; }
  .hero-grid{ grid-template-columns:1fr; }
}

/* ---------- feature split ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.split-flip{ direction:rtl; }
.split-flip > *{ direction:ltr; }
.split-visual{
  aspect-ratio:4/3;
  border-radius:2px;
  position:relative;
  overflow:hidden;
  background:var(--ink);
}
@media (max-width:820px){ .split{ grid-template-columns:1fr; } }

.check-list li{
  display:flex; gap:12px; align-items:flex-start;
  padding:10px 0;
  border-top:1px solid var(--line);
  font-size:0.96rem;
  color:var(--ink-soft);
}
.check-list li:first-child{ border-top:none; }
.check-list li::before{
  content:"";
  width:8px; height:8px;
  margin-top:6px;
  flex:none;
  background:var(--teal-bright);
}

/* ---------- process ---------- */
.process{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:28px;
}
.process-step .idx{
  font-family:var(--mono);
  font-size:0.8rem;
  color:var(--teal-bright);
  margin-bottom:10px;
}
.process-step h4{ margin-bottom:8px; font-size:1.05rem; }
.process-step p{ font-size:0.92rem; }
@media (max-width:900px){ .process{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .process{ grid-template-columns:1fr; } }

/* ---------- team / values ---------- */
.value-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:40px;
}
@media (max-width:820px){ .value-grid{ grid-template-columns:1fr; } }

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--teal-deep),var(--ink) 60%);
  color:var(--white);
  text-align:center;
  padding:80px 0;
}
.cta-band h2{ color:var(--white); margin-bottom:18px; }
.cta-band p{ color:var(--paper-dim); margin:0 auto 32px; max-width:52ch; }

/* ---------- forms ---------- */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
}
@media (max-width:820px){ .contact-grid{ grid-template-columns:1fr; } }

.field{ margin-bottom:20px; }
.field label{
  display:block;
  font-family:var(--mono);
  font-size:0.74rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-soft);
  margin-bottom:8px;
}
.field input, .field textarea, .field select{
  width:100%;
  padding:13px 14px;
  border:1px solid var(--line);
  background:var(--white);
  font-family:var(--body);
  font-size:0.96rem;
  color:var(--ink);
  border-radius:2px;
}
.field input:focus, .field textarea:focus, .field select:focus{
  outline:none;
  border-color:var(--teal-bright);
  box-shadow:0 0 0 3px rgba(31,184,166,0.15);
}
.field textarea{ resize:vertical; min-height:120px; }

.info-block{ margin-bottom:32px; }
.info-block .lbl{
  font-family:var(--mono);
  font-size:0.72rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--teal);
  margin-bottom:6px;
}
.info-block a, .info-block div{ font-size:1.05rem; }

.form-status{
  font-family:var(--mono);
  font-size:0.85rem;
  margin-top:14px;
  min-height:1.2em;
}
.form-status.ok{ color:var(--teal-deep); }

/* ---------- footer ---------- */
footer{
  background:var(--ink);
  color:var(--paper-dim);
  padding:56px 0 28px;
}
.footer-top{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:40px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line-soft);
  margin-bottom:24px;
}
.footer-logo{ display:flex; align-items:center; gap:10px; margin-bottom:14px; }
.footer-logo img{ height:30px; }
.footer-cols{ display:flex; gap:64px; flex-wrap:wrap; }
.footer-col h4{
  font-family:var(--mono);
  font-size:0.74rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--white);
  margin-bottom:14px;
  font-weight:600;
}
.footer-col a, .footer-col li{
  display:block;
  font-size:0.92rem;
  color:var(--paper-dim);
  padding:5px 0;
}
.footer-col a:hover{ color:var(--teal-bright); }
.footer-bottom{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  font-family:var(--mono); font-size:0.74rem;
  color:rgba(245,244,239,0.5);
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--teal-bright);
  outline-offset:2px;
}