/* =========================================================
   HomeEnergyHQ — Design System v1.1 (sharper, brand-fixed)
   ========================================================= */

:root {
  --c-navy:   #0B2545;
  --c-navy-2: #102C52;
  --c-teal:   #13C2C2;
  --c-teal-2: #0FAFAF;
  --c-sun:    #FFB800;
  --c-slate:  #475569;
  --c-slate-2:#94A3B8;
  --c-mist:   #F1F5F9;
  --c-mist-2: #F7FAFC;
  --c-ink:    #0F172A;
  --c-white:  #FFFFFF;
  --c-border: #E2E8F0;
  --c-border-dark: rgba(255,255,255,.14);

  --f-serif: "Fraunces", Georgia, "Times New Roman", serif;
  --f-sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --s-1:4px; --s-2:8px; --s-3:12px; --s-4:16px; --s-5:24px;
  --s-6:32px; --s-7:48px; --s-8:64px; --s-9:96px; --s-10:128px;

  --r-sm:6px; --r-md:12px; --r-lg:20px; --r-pill:999px;

  --shadow-sm: 0 1px 2px rgba(11,37,69,.06);
  --shadow-md: 0 10px 30px rgba(11,37,69,.10);
  --shadow-lg: 0 24px 60px rgba(11,37,69,.18);

  --max-w: 1180px;
  --max-w-prose: 720px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--c-navy); text-decoration: none; }
a:hover { color: var(--c-teal); text-decoration: underline; }
button { font-family: inherit; cursor: pointer; }
hr { border: 0; border-top: 1px solid var(--c-border); margin: var(--s-7) 0; }

/* ------- Typography ------- */
h1, h2, h3, h4 {
  font-family: var(--f-serif);
  color: var(--c-navy);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.018em;
  margin: 0 0 var(--s-4);
}
.display { font-size: clamp(40px, 6vw, 76px); line-height: 1.04; letter-spacing: -0.025em; }
h1       { font-size: clamp(32px, 4.2vw, 58px); }
h2       { font-size: clamp(26px, 3vw, 40px); font-weight: 700; }
h3       { font-family: var(--f-sans); font-size: clamp(20px, 1.7vw, 24px); font-weight: 700; letter-spacing: -0.005em; }
h4       { font-family: var(--f-sans); font-size: 18px; font-weight: 700; }
p        { margin: 0 0 var(--s-4); color: var(--c-ink); }
.lead    { font-size: clamp(17px, 1.5vw, 20px); line-height: 1.55; color: var(--c-slate); max-width: 60ch; }
/* Center the .lead block when its container is text-center */
.text-center > .lead,
.text-center .lead { margin-left: auto; margin-right: auto; }
/* Same for section--navy CTAs (they use text-center) */
.section--navy .text-center .lead { margin-left: auto; margin-right: auto; }
.text-center > p:not(.lead) { max-width: 60ch; margin-left: auto; margin-right: auto; }
small, .caption { font-size: 14px; line-height: 1.45; color: var(--c-slate); }
strong   { font-weight: 700; color: var(--c-navy); }

/* ------- Layout ------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--s-5); }
.prose     { max-width: var(--max-w-prose); margin: 0 auto; }
.section   { padding: clamp(56px, 8vw, 104px) 0; }
.section--tight  { padding: clamp(32px, 5vw, 64px) 0; }
.section--mist   { background: var(--c-mist); }

/* Dark navy section — TEXT MUST INHERIT WHITE */
.section--navy {
  background: var(--c-navy);
  color: rgba(255,255,255,.88);
  background-image:
    radial-gradient(circle at 80% 20%, rgba(19,194,194,.18) 0%, transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(255,184,0,.12) 0%, transparent 35%);
}
.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy h4,
.section--navy strong { color: var(--c-white); }
.section--navy p,
.section--navy .lead,
.section--navy li { color: rgba(255,255,255,.82); }
/* Links that aren't buttons go teal; .btn variants keep their own colours */
.section--navy a:not(.btn) { color: var(--c-teal); }
.section--navy a:not(.btn):hover { color: #4DD9D9; text-decoration: underline; }

/* ------- Grid ------- */
.grid { display: grid; gap: var(--s-5); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* ------- Header ------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.95);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--c-border);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--s-5);
  max-width: var(--max-w); margin: 0 auto;
}

/* ------- Logo (inline component — font-independent) ------- */
.logo {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none;
  color: var(--c-navy);
}
.logo:hover { text-decoration: none; }
.logo__mark { width: 32px; height: 32px; flex-shrink: 0; display: block; }
.logo__word {
  font-family: var(--f-sans);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--c-navy);
  white-space: nowrap;
}
.logo__word em { font-style: normal; color: var(--c-teal); font-weight: 800; }
.site-footer .logo__word { color: var(--c-white); }
.site-footer .logo__word em { color: var(--c-teal); }

/* ------- Nav ------- */
.site-nav { display: flex; align-items: center; gap: var(--s-5); }
.site-nav a {
  color: var(--c-navy); font-weight: 500; font-size: 15px;
  letter-spacing: -0.005em;
}
.site-nav a:hover { color: var(--c-teal); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--c-teal); }
.nav-toggle { display: none; background: transparent; border: 0; padding: 8px; }
.nav-toggle svg { width: 26px; height: 26px; stroke: var(--c-navy); }
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute; top: 60px; right: 0; left: 0;
    background: var(--c-white);
    border-bottom: 1px solid var(--c-border);
    flex-direction: column; align-items: flex-start;
    padding: var(--s-5); gap: var(--s-4);
    display: none;
  }
  .site-nav.is-open { display: flex; }
}

/* ------- Buttons ------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 24px;
  border-radius: var(--r-md);
  font-family: var(--f-sans);
  font-weight: 700; font-size: 15px; line-height: 1;
  letter-spacing: -0.005em;
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  transition: transform .12s ease, background .15s ease, color .15s ease, border-color .15s ease, box-shadow .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
/* PRIMARY — teal with navy text. Bold, high-contrast, unmistakable. */
.btn--primary {
  background: var(--c-teal); color: var(--c-navy) !important;
  border-color: var(--c-teal);
}
.btn--primary:hover {
  background: var(--c-teal-2); border-color: var(--c-teal-2); color: var(--c-navy) !important;
}
/* SECONDARY — solid navy. */
.btn--secondary {
  background: var(--c-navy); color: var(--c-white) !important;
  border-color: var(--c-navy);
}
.btn--secondary:hover { background: #08182E; border-color: #08182E; color: var(--c-white) !important; }
/* GHOST — outlined. */
.btn--ghost {
  background: transparent; color: var(--c-navy) !important; border-color: var(--c-navy);
}
.btn--ghost:hover { background: var(--c-navy); color: var(--c-white) !important; border-color: var(--c-navy); }
/* SUN — yellow accent, used sparingly. */
.btn--sun       { background: var(--c-sun); color: var(--c-navy) !important; border-color: var(--c-sun); }
.btn--sun:hover { background: #E5A700; border-color: #E5A700; color: var(--c-navy) !important; }
.btn--lg        { padding: 17px 30px; font-size: 16px; }
.btn--block     { display: flex; width: 100%; }
/* Ghost variant on dark backgrounds — white text + white border for visibility */
.section--navy .btn--ghost,
.hero .btn--ghost,
.cookie-banner .btn--ghost {
  color: var(--c-white) !important;
  border-color: rgba(255,255,255,.55);
  background: transparent;
}
.section--navy .btn--ghost:hover,
.hero .btn--ghost:hover,
.cookie-banner .btn--ghost:hover {
  background: var(--c-white); color: var(--c-navy) !important; border-color: var(--c-white);
}

/* ------- Hero ------- */
.hero {
  position: relative;
  background: var(--c-navy);
  color: rgba(255,255,255,.88);
  padding: clamp(64px, 9vw, 112px) 0 clamp(80px, 11vw, 140px);
  overflow: hidden;
  isolation: isolate;
}
.hero h1, .hero .display { color: var(--c-white); }
.hero p, .hero .lead { color: rgba(255,255,255,.85); }
.hero .lead { font-size: clamp(18px, 1.6vw, 21px); max-width: 620px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-6); }
.hero__trust { margin-top: var(--s-7); color: rgba(255,255,255,.6); font-size: 13px; letter-spacing: 0.02em; }

/* Hero with full-bleed illustration */
.hero--art { padding: 0; }
.hero--art .hero__bg {
  position: absolute; inset: 0; z-index: -1;
}
.hero--art .hero__bg img,
.hero--art .hero__bg svg {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.hero--art::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(105deg, rgba(11,37,69,.92) 0%, rgba(11,37,69,.78) 38%, rgba(11,37,69,.35) 62%, rgba(11,37,69,0) 90%);
}
.hero--art .container {
  padding-top: clamp(80px, 10vw, 132px);
  padding-bottom: clamp(96px, 12vw, 160px);
  position: relative; z-index: 1;
}
@media (max-width: 760px) {
  .hero--art::before {
    background: linear-gradient(180deg, rgba(11,37,69,.86) 0%, rgba(11,37,69,.92) 100%);
  }
}

/* ------- Cards ------- */
.card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--s-6);
  transition: transform .15s ease, box-shadow .2s ease, border-color .15s ease;
  display: flex; flex-direction: column; gap: var(--s-3);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--c-teal); }
.card h3 { margin: var(--s-2) 0 var(--s-2); }
.card p  { color: var(--c-slate); margin: 0; }
.card__icon {
  width: 44px; height: 44px; border-radius: var(--r-md);
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(19,194,194,.12); color: var(--c-teal);
}
.card--feature { border-color: var(--c-navy); }
.card--feature .card__icon { background: var(--c-teal); color: var(--c-navy); }
.card a.card__link {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 600; color: var(--c-navy);
  margin-top: auto;
}
.card a.card__link::after { content: "→"; transition: transform .15s ease; }
.card a.card__link:hover { color: var(--c-teal); text-decoration: none; }
.card a.card__link:hover::after { transform: translateX(4px); }

/* ------- Pill / badge ------- */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 11px;
  border-radius: var(--r-pill);
  background: rgba(19,194,194,.14); color: #0C7E7E;
  font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.pill--sun  { background: rgba(255,184,0,.18); color: #8C6500; }
.pill--mist { background: var(--c-mist); color: var(--c-navy); }
.hero .pill, .section--navy .pill { background: rgba(19,194,194,.2); color: #B8FAFA; }
.hero .pill--sun, .section--navy .pill--sun { background: rgba(255,184,0,.22); color: #FFD566; }

/* ------- Stats row ------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-6); }
.stats__num { font-family: var(--f-serif); font-size: clamp(36px, 4vw, 56px); color: var(--c-teal); line-height: 1; font-weight: 700; }
.stats__label { color: var(--c-slate); font-size: 14px; margin-top: var(--s-2); max-width: 28ch; }
@media (max-width: 700px) { .stats { grid-template-columns: 1fr; } }

/* ------- Split section (text + illustration) ------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
}
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.split__art {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-navy);
  aspect-ratio: 4 / 3;
}
.split__art img, .split__art svg { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ------- Article + TOC ------- */
.article-meta { color: var(--c-slate); font-size: 14px; margin-bottom: var(--s-5); }
.article h2 { margin-top: var(--s-7); }
.article h3 { margin-top: var(--s-6); color: var(--c-navy); }
.article ul, .article ol { padding-left: 1.4em; margin: 0 0 var(--s-4); }
.article li { margin-bottom: var(--s-2); }
.article blockquote {
  margin: var(--s-6) 0;
  padding: var(--s-5) var(--s-6);
  border-left: 4px solid var(--c-teal);
  background: var(--c-mist);
  border-radius: var(--r-md);
  font-style: italic;
  color: var(--c-navy);
}
.callout {
  background: var(--c-mist);
  border-left: 4px solid var(--c-sun);
  padding: var(--s-5);
  border-radius: var(--r-md);
  margin: var(--s-5) 0;
}
.callout strong { color: var(--c-navy); }
table.data {
  width: 100%; border-collapse: collapse; margin: var(--s-5) 0; font-size: 15px;
  border: 1px solid var(--c-border); border-radius: var(--r-md); overflow: hidden;
}
table.data th, table.data td { padding: 12px 16px; border-bottom: 1px solid var(--c-border); text-align: left; }
table.data th { background: var(--c-mist); color: var(--c-navy); font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
table.data tr:last-child td { border-bottom: 0; }
.toc {
  background: var(--c-mist);
  border-radius: var(--r-md);
  padding: var(--s-5);
  margin-bottom: var(--s-6);
  border: 1px solid var(--c-border);
}
.toc h4 { margin: 0 0 var(--s-3); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-slate); }
.toc ol { padding-left: 1.2em; margin: 0; font-size: 15px; }
.toc a { color: var(--c-navy); }
.toc a:hover { color: var(--c-teal); }

/* ------- Form ------- */
.form { background: var(--c-white); padding: var(--s-6); border-radius: var(--r-lg); border: 1px solid var(--c-border); box-shadow: var(--shadow-sm); }
.form__row { display: grid; gap: 6px; margin-bottom: var(--s-4); }
.form label { font-weight: 600; font-size: 14px; color: var(--c-navy); }
.form input, .form select, .form textarea {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--c-border); border-radius: var(--r-sm);
  font: inherit; font-size: 15px; color: var(--c-ink); background: var(--c-white);
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: 2px solid var(--c-teal); outline-offset: 1px; border-color: var(--c-teal);
}
.form .consent { font-size: 13.5px; color: var(--c-slate); line-height: 1.5; }

/* ------- Footer (FIX: paragraphs must inherit, not use --c-ink) ------- */
.site-footer {
  background: var(--c-navy);
  color: rgba(255,255,255,.72);
  padding: var(--s-8) 0 var(--s-6);
  font-size: 15px;
  border-top: 4px solid var(--c-teal);
}
.site-footer p,
.site-footer li,
.site-footer div { color: rgba(255,255,255,.72); }
.site-footer a { color: rgba(255,255,255,.92); }
.site-footer a:hover { color: var(--c-teal); text-decoration: none; }
.site-footer .logo { color: var(--c-white); }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--s-6);
  padding-bottom: var(--s-7); border-bottom: 1px solid var(--c-border-dark);
}
.footer-grid h5 {
  color: var(--c-white); font-family: var(--f-sans); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700;
  margin: 0 0 var(--s-4);
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-bottom {
  padding-top: var(--s-5);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-3);
  font-size: 13px; color: rgba(255,255,255,.55);
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ------- Cookie banner ------- */
.cookie-banner {
  position: fixed; bottom: 16px; left: 16px; right: 16px;
  max-width: 720px; margin: 0 auto;
  background: var(--c-navy); color: var(--c-white);
  border-radius: var(--r-lg); padding: var(--s-5);
  box-shadow: var(--shadow-lg);
  display: none; z-index: 100;
  font-size: 14px; line-height: 1.5;
  border: 1px solid rgba(255,255,255,.1);
}
.cookie-banner.is-visible { display: block; }
.cookie-banner__row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-3); justify-content: space-between; }
.cookie-banner__text { flex: 1 1 280px; color: rgba(255,255,255,.85); }
.cookie-banner a { color: var(--c-teal); }
.cookie-banner .btn { padding: 10px 16px; font-size: 14px; }
.cookie-banner .btn--ghost { color: var(--c-white); border-color: rgba(255,255,255,.4); }
.cookie-banner .btn--ghost:hover { background: var(--c-white); color: var(--c-navy); border-color: var(--c-white); }

/* ------- Utility ------- */
.text-center { text-align: center; }
.text-muted  { color: var(--c-slate); }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.mt-3 { margin-top: var(--s-3); } .mt-4 { margin-top: var(--s-4); } .mt-5 { margin-top: var(--s-5); }
.mb-5 { margin-bottom: var(--s-5); } .mb-6 { margin-bottom: var(--s-6); }
.hidden { display: none; }

/* ------- Accessibility ------- */
:focus-visible { outline: 3px solid var(--c-sun); outline-offset: 2px; border-radius: 4px; }
.skip-link {
  position: absolute; left: -9999px; top: 8px; z-index: 200;
  background: var(--c-navy); color: var(--c-white);
  padding: 10px 16px; border-radius: var(--r-sm);
}
.skip-link:focus { left: 8px; }