/* ============================================================
   ETERNALGY — Solar EPC
   Design system: minimalist · engineering · modern
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --ink:        #0E1310;
  --ink-2:      #1C2521;
  --soft:       #5A655E;
  --paper:      #F6F5F0;
  --panel:      #ECEAE2;
  --panel-2:    #E2E0D6;
  --line:       rgba(14, 19, 16, 0.13);
  --line-strong:rgba(14, 19, 16, 0.30);

  /* energized green accent */
  --accent:     oklch(0.74 0.158 151);
  --accent-deep:oklch(0.55 0.13 152);
  --on-accent:  #06150d;

  --font-display: 'Google Sans', system-ui, sans-serif;
  --font-body:    'IBM Plex Sans', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, monospace;

  --maxw: 1280px;
  --gutter: clamp(20px, 4.5vw, 72px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: var(--on-accent); }

a { color: inherit; text-decoration: none; }

img { display: block; max-width: 100%; }

/* ---------- layout helpers ---------- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(72px, 11vw, 152px); }

.rule { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------- typographic primitives ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--soft);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent-deep);
}
.eyebrow.no-tick::before { display: none; }

.index {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--accent-deep);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.02;
  margin: 0;
  text-wrap: balance;
}

.display {
  font-size: clamp(42px, 7.4vw, 104px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 0.96;
}

.h-sec {
  font-size: clamp(30px, 4.6vw, 60px);
  letter-spacing: -0.03em;
}

.lede {
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 46ch;
  text-wrap: pretty;
}

.muted { color: var(--soft); }

/* accent text underline mark */
.mark {
  background-image: linear-gradient(transparent 62%, var(--accent) 62%);
  background-size: 100% 100%;
  padding-inline: 2px;
}

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  transition: background .18s ease, color .18s ease, transform .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translate(3px, -3px); }

.btn--accent { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn--ghost  { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--light  { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* ---------- header / nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklch, var(--paper) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
}
.brand__logo {
  height: 32px;
  width: auto;
  display: block;
}
.nav__links {
  display: flex;
  gap: 30px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}
.nav__links a { color: var(--ink-2); transition: color .15s; position: relative; padding-block: 4px; }
.nav__links a:hover { color: var(--ink); }
.nav__links a::after {
  content:""; position:absolute; left:0; right:100%; bottom:0; height:1px;
  background: var(--accent-deep); transition: right .25s ease;
}
.nav__links a:hover::after { right: 0; }
.nav__links a.active { color: var(--ink); }
.nav__links a.active::after { right: 0; }
.nav__cta { display: flex; align-items: center; gap: 14px; }

@media (max-width: 900px) {
  .nav__links { display: none; }
}

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; }
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
          mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
  opacity: .6;
  pointer-events: none;
}
.hero__inner {
  position: relative;
  padding-top: clamp(56px, 9vw, 120px);
  padding-bottom: clamp(40px, 5vw, 64px);
}
.hero__top { display: flex; flex-direction: column; gap: 26px; max-width: 17ch; }
.hero h1 { margin-top: 6px; }
.hero__sub {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(24px, 5vw, 80px);
  align-items: end;
  margin-top: clamp(34px, 5vw, 60px);
}
@media (max-width: 760px){ .hero__sub { grid-template-columns: 1fr; align-items: start; } }

.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* ---------- placeholder image ---------- */
.ph {
  position: relative;
  background-color: var(--panel);
  background-image: repeating-linear-gradient(
    -45deg, transparent 0 13px, rgba(14,19,16,0.045) 13px 14px);
  border: 1px solid var(--line);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.ph::after {
  content: attr(data-label);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--soft);
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 5px 9px;
  margin: 12px;
}
.ph--ink { background-color: var(--ink-2); border-color: rgba(255,255,255,.12);
  background-image: repeating-linear-gradient(-45deg, transparent 0 13px, rgba(255,255,255,0.05) 13px 14px); }
.ph--ink::after { background: var(--ink); color: #9aa39d; border-color: rgba(255,255,255,.16); }

/* ---------- stats band ---------- */
.stats {
  background: var(--ink);
  color: var(--paper);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
}
.stat {
  padding: clamp(34px, 4vw, 56px) 24px;
  border-left: 1px solid rgba(255,255,255,.12);
}
.stat:first-child { border-left: 0; }
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(34px, 3.6vw, 52px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
}
.stat__num .u { color: var(--accent); }
.stat__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #97a09a;
  margin-top: 14px;
  line-height: 1.5;
}
@media (max-width: 980px){ .stats__grid { grid-template-columns: repeat(3,1fr); }
  .stat:nth-child(3n+1){ border-left:0; } .stat:nth-child(n+4){ border-top:1px solid rgba(255,255,255,.12);} }
@media (max-width: 560px){ .stats__grid { grid-template-columns: repeat(2,1fr); }
  .stat { border-left:1px solid rgba(255,255,255,.12);} .stat:nth-child(odd){border-left:0;}
  .stat:nth-child(n+3){ border-top:1px solid rgba(255,255,255,.12);} }

/* ---------- section heading block ---------- */
.sec-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 4vw, 60px);
  align-items: end;
  margin-bottom: clamp(40px, 5vw, 68px);
}
.sec-head__r { color: var(--ink-2); max-width: 42ch; padding-bottom: 6px; }
@media (max-width: 760px){ .sec-head { grid-template-columns: 1fr; } }

/* ---------- services ---------- */
.svc {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.svc__item {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(28px, 3vw, 40px);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background .2s ease;
}
.svc__item:hover { background: var(--panel); }
.svc__no { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .14em; color: var(--accent-deep); }
.svc__title { font-family: var(--font-display); font-size: clamp(21px,1.9vw,27px); font-weight: 500; letter-spacing: -0.02em; margin-top: 56px; }
.svc__desc { color: var(--soft); font-size: 15.5px; margin-top: 12px; }
.svc__tags { margin-top: auto; padding-top: 22px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; color: var(--ink-2); }
@media (max-width: 880px){ .svc { grid-template-columns: repeat(2,1fr);} }
@media (max-width: 560px){ .svc { grid-template-columns: 1fr;} .svc__item{min-height:auto;} }

/* ---------- why / split feature ---------- */
.why { background: var(--ink); color: var(--paper); }
.why .eyebrow { color: #97a09a; }
.why .h-sec { color: var(--paper); }
.why__grid { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(28px,5vw,80px); align-items:center; }
@media (max-width: 860px){ .why__grid{ grid-template-columns:1fr; } }
.why__points { display: grid; gap: 4px; margin-top: 8px; }
.point { display: grid; grid-template-columns: 56px 1fr; gap: 8px; padding: 24px 0; border-top: 1px solid rgba(255,255,255,.13); }
.point:last-child { border-bottom: 1px solid rgba(255,255,255,.13); }
.point__n { font-family: var(--font-mono); font-size: 12.5px; color: var(--accent); letter-spacing:.1em; padding-top:4px;}
.point__t { font-family: var(--font-display); font-size: 20px; font-weight:500; letter-spacing:-0.01em; }
.point__d { color: #aab2ac; font-size: 15px; margin-top: 7px; max-width: 44ch;}

/* ---------- innovation cards ---------- */
.inno { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(20px,3vw,32px); }
@media (max-width: 820px){ .inno{ grid-template-columns:1fr; } }
.inno__card { border: 1px solid var(--line); background: var(--paper); padding: clamp(26px,2.6vw,38px); display:flex; flex-direction:column; }
.inno__card .ph { aspect-ratio: 16/9; margin-top: 26px; }
.inno__tag { font-family:var(--font-mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--accent-deep); }
.inno__h { font-family:var(--font-display); font-size: clamp(22px,2.2vw,30px); font-weight:500; letter-spacing:-0.02em; margin-top:14px; }
.inno__p { color: var(--ink-2); margin-top: 12px; max-width: 46ch; }

/* ---------- timeline ---------- */
.tl { display: grid; gap: 0; }
.tl__row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: clamp(16px,4vw,48px);
  padding: 28px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.tl__row:last-child { border-bottom: 1px solid var(--line); }
.tl__date { font-family: var(--font-mono); font-size: 13px; letter-spacing:.06em; color: var(--accent-deep); }
.tl__h { font-family: var(--font-display); font-size: clamp(19px,1.7vw,24px); font-weight:500; letter-spacing:-0.01em; }
.tl__d { color: var(--soft); font-size: 15px; margin-top: 6px; max-width: 64ch; }
.tl__row.is-peak .tl__h { color: var(--ink); }
.tl__row.is-peak .tl__date { color: var(--ink); background: var(--accent); padding: 3px 8px; }
@media (max-width:620px){ .tl__row{ grid-template-columns:1fr; gap:6px;} }

/* ---------- certifications ---------- */
.cert-band { background: var(--panel); }
.cert-grid { display:grid; grid-template-columns: repeat(4,1fr); border-top:1px solid var(--line); border-left:1px solid var(--line); }
.cert {
  border-right:1px solid var(--line); border-bottom:1px solid var(--line);
  padding: 28px; min-height: 150px; display:flex; flex-direction:column; justify-content:space-between;
  background: var(--paper);
}
.cert__name { font-family:var(--font-display); font-weight:500; font-size:17px; letter-spacing:-0.01em; line-height:1.15; }
.cert__sub { font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--soft); margin-top:6px;}
.cert__tick { font-family:var(--font-mono); font-size:12px; color: var(--accent-deep); }
@media (max-width: 880px){ .cert-grid{ grid-template-columns:repeat(2,1fr);} }

/* ---------- partner highlight ---------- */
.partner { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(24px,4vw,64px); align-items:center; }
@media (max-width:820px){ .partner{ grid-template-columns:1fr;} }
.partner .ph { aspect-ratio: 4/3; }

/* ---------- contact / cta ---------- */
.cta { background: var(--accent); color: var(--on-accent); }
.cta__grid { display:grid; grid-template-columns: 1.3fr 1fr; gap: clamp(28px,5vw,72px); align-items:end; }
@media (max-width: 820px){ .cta__grid{ grid-template-columns:1fr; } }
.cta .display { letter-spacing: -0.04em; }
.cta__meta { font-family: var(--font-mono); font-size: 13px; letter-spacing:.04em; }
.cta__meta a { border-bottom: 1px solid rgba(6,21,13,.4); }

/* ---------- locations / footer ---------- */
.foot { background: var(--ink); color: var(--paper); }
.loc-grid { display:grid; grid-template-columns: repeat(3,1fr); gap: clamp(20px,3vw,40px); }
@media (max-width: 760px){ .loc-grid{ grid-template-columns:1fr; } }
.loc__tag { font-family:var(--font-mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); }
.loc__addr { color:#aab2ac; font-size:15px; margin-top:12px; line-height:1.6; max-width: 34ch; }
.foot__bottom { display:flex; flex-wrap:wrap; justify-content:space-between; gap:16px; align-items:center;
  padding-top: 40px; margin-top: 56px; border-top:1px solid rgba(255,255,255,.13);
  font-family:var(--font-mono); font-size:12.5px; color:#8b948e; letter-spacing:.04em;}

/* ---------- reveal animation ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
  .reveal.in { opacity: 1; transform: none; }
}

/* ============================================================
   CUSTOM ARTICLE, SPECIFICATIONS AND FAQ ACCORDION FORMATTING
   ============================================================ */
.article-body-container {
  max-width: 900px;
  margin: 0 auto;
}
.article-header {
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2rem;
}
.article-category {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.category-tip {
  background: color-mix(in oklch, var(--accent) 15%, transparent);
  color: var(--accent-deep);
  border: 1px solid var(--line);
}
.category-news {
  background: color-mix(in oklch, var(--accent) 15%, transparent);
  color: var(--accent-deep);
  border: 1px solid var(--line);
}
.category-company {
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
}
.article-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 500;
  line-height: 1.1;
  margin-bottom: 1rem;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  color: var(--soft);
  font-size: 14px;
  font-family: var(--font-mono);
}
.article-body {
  font-size: 17px;
  color: var(--ink-2);
  line-height: 1.6;
}
.article-body h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 500;
  color: var(--ink);
  margin-top: 3rem;
  margin-bottom: 1.25rem;
}
.article-body h3 {
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 500;
  color: var(--ink);
  margin-top: 2rem;
  margin-bottom: 1rem;
}
.article-body p {
  margin-bottom: 1.5rem;
}
.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}
.article-body li {
  margin-bottom: 0.5rem;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2.5rem 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.article-body th, .article-body td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.article-body th {
  background: var(--panel-2);
  font-weight: 600;
  color: var(--ink);
}
.article-body blockquote {
  border-left: 4px solid var(--accent-deep);
  padding: 0.75rem 1.75rem;
  margin: 2rem 0;
  color: var(--soft);
  font-style: italic;
  background: var(--panel);
}
.article-body pre {
  background: var(--ink);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 1.5rem;
  color: var(--paper);
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--panel-2);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}
.article-body pre code {
  background: none;
  padding: 0;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.tag {
  background: var(--panel);
  color: var(--ink-2);
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 13px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--line);
  transition: all .15s;
}
.tag:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}
.card-meta {
  display: flex;
  gap: 1rem;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--soft);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}
.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}
.card-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: var(--ink);
  line-height: 1.2;
}
.card-summary {
  color: var(--soft);
  font-size: 15.5px;
  line-height: 1.5;
}