/* HD Energy Solutions — site styles */
:root {
  --navy: #0b1f3a;
  --navy-2: #12305a;
  --navy-3: #1b4380;
  --amber: #f7b32b;
  --amber-dark: #d9950f;
  --ink: #1a222e;
  --muted: #5b6675;
  --line: #e3e8ef;
  --bg: #ffffff;
  --bg-soft: #f4f6f9;
  --ok: #1f8a4c;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(11, 31, 58, 0.10);
  --font-display: "Barlow", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --container: 1140px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}
img, svg { max-width: 100%; display: block; }
a { color: var(--navy-3); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: var(--navy);
}
h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.75rem); }
h3 { font-size: 1.35rem; font-weight: 700; }
p { margin: 0 0 1em; }
ul { padding-left: 1.2em; }
.container { width: min(var(--container), 100% - 2.5rem); margin-inline: auto; }
.section { padding: clamp(3.5rem, 7vw, 6rem) 0; }
.section-soft { background: var(--bg-soft); }
.section-navy { background: var(--navy); color: #d7deea; }
.section-navy h2, .section-navy h3 { color: #fff; }
.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber-dark);
  margin-bottom: 0.75rem;
}
.section-navy .eyebrow { color: var(--amber); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.section-navy .lead { color: #b9c4d6; }
.center { text-align: center; }
.center .lead { margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.05rem; letter-spacing: 0.01em;
  padding: 0.85rem 1.5rem; border-radius: 8px;
  text-decoration: none; border: 2px solid transparent;
  cursor: pointer; transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--amber); color: var(--navy); border-color: var(--amber); }
.btn-primary:hover { background: var(--amber-dark); border-color: var(--amber-dark); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.55); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); }
.btn-navy { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-navy:hover { background: var(--navy-2); border-color: var(--navy-2); }
.btn-ghost { background: transparent; color: var(--navy); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--navy); }
.btn svg { width: 1.1em; height: 1.1em; }

/* Top bar */
.topbar {
  background: var(--navy); color: #c9d3e3; font-size: 0.85rem;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 36px; }
.topbar span { display: inline-flex; align-items: center; gap: 0.4rem; }
.topbar svg { width: 14px; height: 14px; color: var(--amber); }
.topbar a { color: #fff; text-decoration: none; font-weight: 600; }
.topbar-left { display: flex; gap: 1.5rem; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header .container { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 76px; }
.logo { display: inline-flex; align-items: center; gap: 0.7rem; text-decoration: none; color: var(--navy); }
.logo-mark { height: 38px; width: auto; flex: none; }
.logo-text { display: flex; flex-direction: column; line-height: 1; font-family: var(--font-display); }
.logo-text strong { font-size: 1.3rem; font-weight: 800; letter-spacing: -0.01em; }
.logo-text small { font-size: 0.62rem; font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted); margin-top: 3px; }
.logo.on-dark { color: #fff; }
.logo.on-dark .logo-text small { color: #b9c4d6; }
.nav { display: flex; align-items: center; gap: 1.75rem; }
.nav a { font-weight: 600; font-size: 0.98rem; text-decoration: none; color: var(--ink); padding: 0.25rem 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { border-bottom-color: var(--amber); color: var(--navy); }
.header-cta { display: flex; align-items: center; gap: 0.75rem; }
.nav-toggle {
  display: none; background: none; border: 2px solid var(--line); border-radius: 8px;
  width: 44px; height: 44px; padding: 0; cursor: pointer; color: var(--navy);
}
.nav-toggle svg { width: 24px; height: 24px; margin: auto; }

/* Hero */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(1200px 600px at 80% -10%, var(--navy-3) 0%, var(--navy) 55%);
  color: #fff;
  padding: clamp(3.5rem, 8vw, 7rem) 0;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 48 48'%3E%3Cpath d='M0 47.5h48M47.5 0v48' stroke='%23ffffff' stroke-opacity='0.08' fill='none'/%3E%3C/svg%3E");
}
.hero::after {
  content: ""; position: absolute; right: -8%; bottom: -30%; width: 55vw; height: 55vw; max-width: 720px; max-height: 720px;
  border-radius: 50%; background: radial-gradient(circle, rgba(247,179,43,0.18) 0%, rgba(247,179,43,0) 60%); pointer-events: none;
}
.hero .container { position: relative; display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 3rem; align-items: center; }
.hero h1 { color: #fff; margin-bottom: 1rem; }
.hero h1 em { font-style: normal; color: var(--amber); }
.hero .lead { color: #c9d3e3; font-size: 1.2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin: 1.75rem 0 1.25rem; }
.hero-note { font-size: 0.95rem; color: #a9b6cb; display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; }
.hero-note span { display: inline-flex; align-items: center; gap: 0.4rem; }
.hero-note svg { width: 16px; height: 16px; color: var(--amber); }

.hero-card {
  background: #fff; color: var(--ink); border-radius: var(--radius); padding: 1.75rem; box-shadow: var(--shadow);
  border-top: 6px solid var(--amber);
}
.hero-card h3 { margin-bottom: 0.25rem; }
.hero-card p { color: var(--muted); font-size: 0.95rem; }
.checklist { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; gap: 0.7rem; }
.checklist li { display: flex; gap: 0.7rem; align-items: flex-start; font-weight: 500; }
.checklist svg { width: 22px; height: 22px; flex: none; color: var(--ok); margin-top: 2px; }
.hero-card .btn { width: 100%; justify-content: center; margin-top: 1.25rem; }

/* Trust strip */
.trust { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.trust .container { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; padding: 1.25rem 0; }
.trust-item { display: flex; align-items: center; gap: 0.75rem; font-size: 0.92rem; line-height: 1.3; }
.trust-item svg { width: 30px; height: 30px; flex: none; color: var(--navy-3); }
.trust-item strong { display: block; font-family: var(--font-display); font-size: 1rem; color: var(--navy); }

/* Grid & cards */
.grid { display: grid; gap: 1.5rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: transparent; }
.card-icon {
  width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(247,179,43,0.16); color: var(--navy); margin-bottom: 1rem;
}
.card-icon svg { width: 28px; height: 28px; }
.card h3 { margin-bottom: 0.4rem; }
.card p { color: var(--muted); font-size: 0.98rem; margin-bottom: 0.75rem; }
.card ul { color: var(--muted); font-size: 0.95rem; margin: 0; padding-left: 1.1em; }
.card li { margin-bottom: 0.25rem; }
.card-link { font-weight: 700; text-decoration: none; color: var(--navy); font-family: var(--font-display); }
.card-link::after { content: " →"; }
a.card { text-decoration: none; color: inherit; display: block; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; margin-bottom: 2.5rem; }
.section-head h2 { margin-bottom: 0.25rem; }
.section-head .lead { margin: 0; }

/* Feature split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: center; }
.split-visual {
  border-radius: var(--radius); overflow: hidden; min-height: 360px;
  background: linear-gradient(160deg, var(--navy-2), var(--navy)); position: relative;
  display: grid; place-items: center; color: #fff;
}
.split-visual svg { width: 70%; height: auto; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.75rem; }
.stat { border-left: 3px solid var(--amber); padding-left: 0.9rem; }
.stat strong { display: block; font-family: var(--font-display); font-size: 1.8rem; color: var(--navy); line-height: 1; }
.stat span { font-size: 0.9rem; color: var(--muted); }
.section-navy .stat strong { color: #fff; }
.section-navy .stat span { color: #b9c4d6; }
.section-navy .card { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.12); color: #d7deea; }
.section-navy .card h3 { color: #fff; }
.section-navy .card p, .section-navy .card ul { color: #b9c4d6; }
.section-navy .card-icon { background: rgba(247,179,43,0.18); color: var(--amber); }
.section-navy a { color: #fff; }

/* Steps */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.step { position: relative; padding-top: 0.5rem; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: var(--font-display); font-weight: 800; font-size: 2.6rem; color: var(--amber); line-height: 1; display: block; margin-bottom: 0.6rem;
}
.step h3 { font-size: 1.15rem; }
.step p { color: var(--muted); font-size: 0.97rem; margin: 0; }

/* Area */
.area-list { columns: 3; column-gap: 2rem; list-style: none; padding: 0; margin: 1.5rem 0 0; }
.area-list li { padding: 0.35rem 0; border-bottom: 1px solid var(--line); font-weight: 500; break-inside: avoid; }

/* FAQ */
.faq { max-width: 820px; margin-inline: auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 0.25rem 0; }
.faq summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--navy); padding: 1rem 0;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.6rem; color: var(--amber-dark); line-height: 1; flex: none; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); margin: 0 0 1.25rem; max-width: 70ch; }

/* Reviews */
.review { display: flex; flex-direction: column; gap: 0.75rem; }
.stars { color: var(--amber); letter-spacing: 2px; font-size: 1.1rem; }
.review footer { font-size: 0.9rem; color: var(--muted); font-weight: 600; }

/* CTA band */
.cta-band { background: var(--amber); color: var(--navy); padding: 3rem 0; }
.cta-band .container { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.cta-band h2 { color: var(--navy); margin: 0 0 0.25rem; font-size: clamp(1.6rem, 3vw, 2.2rem); }
.cta-band p { margin: 0; font-weight: 500; }
.cta-band .btn-navy { font-size: 1.15rem; padding: 1rem 1.75rem; }

/* Contact / form */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 3rem; align-items: start; }
.contact-details { display: grid; gap: 1.25rem; }
.contact-item { display: flex; gap: 1rem; align-items: flex-start; }
.contact-item svg { width: 26px; height: 26px; flex: none; color: var(--amber-dark); margin-top: 2px; }
.contact-item strong { display: block; font-family: var(--font-display); color: var(--navy); }
.contact-item a { text-decoration: none; color: var(--ink); font-weight: 500; }
.contact-item a:hover { color: var(--navy-3); }
.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 1rem; }
.field label { font-weight: 600; font-size: 0.92rem; color: var(--navy); }
.field input, .field select, .field textarea {
  font: inherit; font-size: 1rem; padding: 0.75rem 0.9rem; border: 1.5px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 3px solid rgba(247,179,43,0.45); border-color: var(--amber-dark); }
.field textarea { min-height: 130px; resize: vertical; }
.form small { color: var(--muted); }
.form .btn { width: 100%; justify-content: center; font-size: 1.1rem; }
.form-msg { display: none; margin-top: 1rem; padding: 0.9rem 1rem; border-radius: 8px; font-weight: 500; }
.form-msg.ok { display: block; background: #e8f6ee; color: #14602f; }
.form-msg.err { display: block; background: #fdecec; color: #9b1c1c; }
.honeypot { position: absolute; left: -9999px; }

/* Page hero (inner pages) */
.page-hero { background: var(--navy); color: #c9d3e3; padding: clamp(2.5rem, 6vw, 4.5rem) 0; position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; opacity: 0.35; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 48 48'%3E%3Cpath d='M0 47.5h48M47.5 0v48' stroke='%23ffffff' stroke-opacity='0.08' fill='none'/%3E%3C/svg%3E"); }
.page-hero .container { position: relative; }
.page-hero h1 { color: #fff; font-size: clamp(2.2rem, 4.5vw, 3.4rem); margin-bottom: 0.75rem; }
.page-hero .lead { color: #c9d3e3; }
.breadcrumb { font-size: 0.85rem; color: #a9b6cb; margin-bottom: 1rem; }
.breadcrumb a { color: #fff; text-decoration: none; }

/* Prose */
.prose { max-width: 72ch; }
.prose h2 { font-size: 1.8rem; margin-top: 2rem; }
.prose h3 { margin-top: 1.5rem; }
.prose ul li { margin-bottom: 0.35rem; }
.callout { background: var(--bg-soft); border-left: 4px solid var(--amber); padding: 1.25rem 1.5rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1.5rem 0; }
.callout p:last-child { margin: 0; }

/* Footer */
.footer { background: #08172c; color: #b9c4d6; padding: 3.5rem 0 1.5rem; font-size: 0.95rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2.5rem; margin-bottom: 2.5rem; }
.footer h4 { color: #fff; font-size: 1rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 1rem; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 0.5rem; }
.footer a { color: #d7deea; text-decoration: none; }
.footer a:hover { color: var(--amber); }
.footer p { margin: 0.75rem 0 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 1.25rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: 0.85rem; color: #8c9bb3; }
.footer-bottom a { color: #a9b6cb; }
.licence-badge {
  display: inline-flex; align-items: center; gap: 0.5rem; margin-top: 1rem; padding: 0.5rem 0.8rem;
  border: 1px solid rgba(255,255,255,0.2); border-radius: 8px; font-size: 0.85rem; color: #fff;
}
.licence-badge svg { width: 18px; height: 18px; color: var(--amber); }

/* Mobile call bar */
.callbar {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  background: var(--navy); border-top: 1px solid rgba(255,255,255,0.15);
  padding: 0.6rem 0.75rem; gap: 0.6rem;
  padding-bottom: calc(0.6rem + env(safe-area-inset-bottom));
}
.callbar .btn { flex: 1; justify-content: center; padding: 0.8rem 1rem; }

/* Responsive */
@media (max-width: 1000px) {
  .trust .container { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .area-list { columns: 2; }
}
@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 2rem; }
  .split-visual { min-height: 260px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav a { padding: 0.95rem 1.25rem; border-bottom: 1px solid var(--line); }
  .nav a[aria-current="page"] { border-bottom-color: var(--line); background: var(--bg-soft); }
  .nav-toggle { display: inline-flex; }
  .header-cta .btn { display: none; }
  .topbar-left span:nth-child(2) { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 16px; padding-bottom: 72px; }
  .trust .container { grid-template-columns: 1fr 1fr; }
  .grid-3, .grid-2, .grid-4, .steps, .form-row, .stat-row { grid-template-columns: 1fr; }
  .area-list { columns: 2; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .callbar { display: flex; }
  .topbar-left { gap: 0.75rem; }
  .topbar .container { font-size: 0.8rem; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .cta-band .btn-navy { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .btn { transition: none; }
}