/* ===================================================================
   HALO SUN ENERGY SYSTEMS — Design tokens
   Palette: dusk-sky navy + solar gold + ember accent, cool paper (not cream)
   Type: Space Grotesk (display) / Inter (body) / IBM Plex Mono (data)
=================================================================== */
:root{
  --ink: #0F2038;
  --ink-soft: #182F4C;
  --paper: #EFF3F6;
  --paper-alt: #FFFFFF;
  --sun: #D9A94E;
  --sun-dim: #B98B3A;
  --ember: #E85D2C;
  --slate: #24303D;
  --mist: #7C8B9B;
  --line: rgba(11,27,45,0.10);
  --line-dark: rgba(255,255,255,0.12);

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

  --radius: 14px;
  --wrap: 1160px;
}

*{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(--slate);
  background:var(--paper);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3{
  font-family:var(--font-display);
  color:var(--ink);
  line-height:1.1;
  margin:0 0 0.4em;
  letter-spacing:-0.01em;
}
h1{font-size:clamp(2.4rem, 5vw, 4rem); font-weight:700;}
h2{font-size:clamp(1.8rem, 3.4vw, 2.6rem); font-weight:600;}
h3{font-size:1.15rem; font-weight:600;}
p{margin:0 0 1em;}
a{color:inherit;}
ol,ul{padding:0; margin:0; list-style:none;}
img{max-width:100%; display:block;}

.wrap{max-width:var(--wrap); margin:0 auto; padding:0 24px;}

.eyebrow{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--ember);
  margin:0 0 0.9em;
  font-weight:600;
}

.section-sub{max-width:640px; color:var(--mist);}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible{
  outline:3px solid var(--sun);
  outline-offset:2px;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:999px;
  font-family:var(--font-body);
  font-weight:600;
  font-size:0.95rem;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--sun); color:var(--ink);}
.btn-primary:hover{background:#FFC24D;}
.btn-ghost{background:transparent; color:inherit; border-color:currentColor;}
.hero .btn-ghost{border-color:rgba(255,255,255,0.5); color:#fff;}
.hero .btn-ghost:hover{border-color:#fff;}
.btn-small{padding:9px 18px; font-size:0.85rem;}
.btn-full{width:100%;}

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(239,243,246,0.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-row{
  display:flex; align-items:center; gap:24px;
  padding:14px 24px;
}
.logo{
  display:flex; align-items:center; gap:10px;
  font-family:var(--font-display); font-weight:600; font-size:1.05rem;
  text-decoration:none; color:var(--ink);
  margin-right:auto;
}
.logo em{font-style:normal; font-weight:500; color:var(--mist);}
.logo-mark{width:38px; height:auto; flex:none; border-radius:8px;}
.main-nav{display:flex; gap:28px;}
.main-nav a{text-decoration:none; font-size:0.92rem; font-weight:500; color:var(--slate);}
.main-nav a:hover{color:var(--ember);}
.nav-toggle{display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:6px;}
.nav-toggle span{width:22px; height:2px; background:var(--ink); display:block;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:radial-gradient(circle at 50% 20%, var(--ink-soft), var(--ink) 70%);
  color:#fff;
  overflow:hidden;
  padding:110px 0 130px;
}
.halo-arcs{
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  pointer-events:none;
}
.halo-arcs svg{width:min(140vw, 1000px); height:auto; opacity:0.9;}
.arc{fill:none; stroke-linecap:round;}
.arc-1{stroke:var(--sun); stroke-width:1.5; stroke-dasharray:4 14; opacity:0.55; animation:spin 90s linear infinite;}
.arc-2{stroke:var(--ember); stroke-width:1; stroke-dasharray:2 10; opacity:0.35; animation:spin 130s linear infinite reverse;}
.arc-3{stroke:#fff; stroke-width:1; stroke-dasharray:1 16; opacity:0.15; animation:spin 200s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}
.halo-arcs svg{transform-origin:center;}
.arc{transform-origin:450px 450px;}

.hero-content{position:relative; max-width:700px;}
.hero-badge{width:220px; height:auto; margin-bottom:28px; border-radius:12px;}
.hero .eyebrow{color:var(--sun);}
.hero h1{color:#fff;}
.hero-sub{color:rgba(255,255,255,0.75); font-size:1.08rem; max-width:560px;}
.hero-actions{display:flex; gap:14px; flex-wrap:wrap; margin-top:8px;}

/* ---------- Sections ---------- */
.section{padding:96px 0;}
.section-dark{background:var(--ink); color:rgba(255,255,255,0.85);}
.section-dark h2, .section-dark h3{color:#fff;}
.section-dark .section-sub{color:rgba(255,255,255,0.55);}
.section-dark p{color:rgba(255,255,255,0.65);}
.section-dark code{color:var(--sun);}

/* ---------- Grid / cards ---------- */
.grid{display:grid; gap:24px;}
.grid-4{grid-template-columns:repeat(4, 1fr);}
.grid-3{grid-template-columns:repeat(3, 1fr);}

.card{
  background:var(--paper-alt);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px 24px;
}
.card-mark{
  font-family:var(--font-mono); color:var(--ember);
  font-size:0.85rem; margin-bottom:12px; font-weight:600;
}
.card p{color:var(--mist); margin:0; font-size:0.94rem;}

.why-item h3{margin-bottom:0.35em;}
.why-item p{color:var(--mist); font-size:0.94rem; margin:0;}

/* ---------- Process ---------- */
.process-list{display:flex; flex-direction:column; gap:0;}
.process-list li{
  display:flex; gap:22px; align-items:flex-start;
  padding:22px 0;
  border-top:1px solid var(--line-dark);
}
.process-list li:first-child{border-top:none;}
.ring{
  flex:none; width:42px; height:42px; border-radius:50%;
  border:1.5px solid var(--sun);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-mono); color:var(--sun); font-weight:600;
}
.process-list h3{color:#fff; margin-bottom:0.3em;}
.process-list p{margin:0; color:rgba(255,255,255,0.6); font-size:0.94rem;}

/* ---------- Calculator ---------- */
.calc-panel{
  display:grid; grid-template-columns:1fr 1fr; gap:0;
  background:var(--ink);
  border-radius:20px;
  overflow:hidden;
  margin-top:36px;
}
.calc-inputs{padding:40px; display:flex; flex-direction:column; gap:18px;}
.calc-results{
  padding:40px; background:var(--ink-soft);
  display:flex; flex-direction:column; gap:14px;
  border-left:1px solid var(--line-dark);
}
.field{display:flex; flex-direction:column; gap:6px; font-size:0.9rem; color:rgba(255,255,255,0.75); font-weight:500;}
.field input, .field select, .field textarea{
  font-family:var(--font-body);
  font-size:1rem;
  padding:12px 14px;
  border-radius:8px;
  border:1px solid rgba(255,255,255,0.18);
  background:rgba(255,255,255,0.06);
  color:#fff;
}
.field input::placeholder{color:rgba(255,255,255,0.35);}
.calc-note{font-size:0.78rem; color:rgba(255,255,255,0.4); margin:0;}

.result-row{
  display:flex; justify-content:space-between; align-items:baseline;
  gap:12px; padding:10px 0; border-bottom:1px solid var(--line-dark);
  font-size:0.9rem; color:rgba(255,255,255,0.7);
}
.result-row strong{font-family:var(--font-mono); color:#fff; font-size:1rem; text-align:right;}
.result-highlight strong{color:var(--sun); font-size:1.2rem;}
#calc-cta{margin-top:10px;}

/* ---------- Gallery ---------- */
.gallery-grid{margin-top:36px;}
.gallery-tile{
  margin:0; aspect-ratio:4/3; border-radius:12px;
  background:linear-gradient(135deg, var(--ink-soft), var(--ink));
  border:1px dashed rgba(255,176,32,0.4);
  display:flex; align-items:center; justify-content:center;
  color:rgba(255,255,255,0.45); font-size:0.85rem; font-family:var(--font-mono);
  text-align:center; padding:12px;
}

/* ---------- Lead form ---------- */
.section-form{background:var(--paper-alt);}
.form-grid{display:grid; grid-template-columns:0.9fr 1.3fr; gap:56px; align-items:start;}
.contact-details{margin-top:24px; font-size:0.94rem;}
.contact-details p{margin:0 0 8px;}
.contact-details a{text-decoration:none; color:var(--ember);}

.lead-form{
  display:grid; grid-template-columns:1fr 1fr; gap:16px;
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:28px;
}
.lead-form .field{color:var(--slate); font-size:0.88rem;}
.lead-form input, .lead-form select, .lead-form textarea{
  font-family:var(--font-body); font-size:0.98rem;
  padding:11px 13px; border-radius:8px; border:1px solid var(--line);
  background:#fff; color:var(--slate);
}
.field-full{grid-column:1 / -1;}
.hp-field{position:absolute; left:-9999px; width:1px; height:1px; opacity:0;}
.form-status{grid-column:1/-1; margin:0; font-size:0.88rem; min-height:1.2em;}
.form-status.ok{color:#1a7f4a;}
.form-status.err{color:var(--ember);}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink); color:rgba(255,255,255,0.6); padding:56px 0 28px;}
.footer-row{display:flex; justify-content:space-between; gap:24px; flex-wrap:wrap; margin-bottom:40px;}
.footer-brand .logo{color:#fff;}
.footer-brand > p{color:rgba(255,255,255,0.45); font-size:0.9rem; margin-top:14px; max-width:280px;}
.footer-contact{color:rgba(255,255,255,0.55); font-size:0.88rem; line-height:1.7;}
.footer-contact a{color:rgba(255,255,255,0.7); text-decoration:none;}
.footer-contact a:hover{color:var(--sun);}
.footer-links{display:flex; gap:22px; align-items:flex-start; flex-wrap:wrap;}
.footer-links a{text-decoration:none; font-size:0.9rem; color:rgba(255,255,255,0.6);}
.footer-links a:hover{color:var(--sun);}
.footer-tagline{
  text-align:center; font-family:var(--font-mono); text-transform:uppercase;
  letter-spacing:0.18em; font-size:0.78rem; color:var(--sun);
  margin:0 0 18px; padding-top:28px; border-top:1px solid var(--line-dark);
}
.footer-tagline span{color:rgba(255,255,255,0.3); margin:0 6px;}
.footer-copy{text-align:center; font-size:0.8rem; color:rgba(255,255,255,0.35); margin:0;}

/* ---------- Responsive ---------- */
@media (max-width:920px){
  .grid-4{grid-template-columns:repeat(2, 1fr);}
  .grid-3{grid-template-columns:repeat(2, 1fr);}
  .calc-panel{grid-template-columns:1fr;}
  .calc-results{border-left:none; border-top:1px solid var(--line-dark);}
  .form-grid{grid-template-columns:1fr;}
}
@media (max-width:720px){
  .main-nav{
    position:absolute; top:100%; left:0; right:0;
    background:var(--paper); border-bottom:1px solid var(--line);
    flex-direction:column; padding:16px 24px; gap:16px;
    display:none;
  }
  .main-nav.open{display:flex;}
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .grid-4{grid-template-columns:1fr;}
  .grid-3{grid-template-columns:1fr;}
  .lead-form{grid-template-columns:1fr;}
  .field-full{grid-column:auto;}
  .hero{padding:80px 0 90px;}
}