/* ============================================================
   Greenkey Africa: Home page
   Implemented from the Claude Design project
   "GreenKey responsive website design" → index.html.
   All values are the design's own; only the layout mechanics
   (React inline styles → classes) and the responsive
   breakpoints are new.
   ============================================================ */

/* page-level link colour, from the design file's own <style> block */
a { color: var(--color-primary-hover); text-decoration: none; }
a:hover { color: var(--moss-900); text-decoration: underline; }

img { max-width: 100%; }

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

/* ---------- Nav ---------- */
.gk-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(241, 239, 232, 0.92); /* stone-100 @ 92% */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
}
.gk-nav.scrolled { box-shadow: var(--shadow-card); }
.gk-nav__inner {
  padding-top: 20px;
  padding-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.gk-brand { display: block; line-height: 0; flex-shrink: 0; }
.gk-brand:hover { text-decoration: none; }
.gk-brand img { height: 34px; width: auto; display: block; }

.nav__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 32px;
  align-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
}
.gk-navlink { color: var(--text-body); }
.gk-navlink:hover { color: var(--color-primary-hover); text-decoration: none; }
.gk-navlink.is-active { color: var(--color-primary-hover); }

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--moss-900);
  padding: 8px;
  cursor: pointer;
  line-height: 0;
}

/* ---------- Hero (full-bleed) ---------- */
/* Sized to the viewport minus the sticky nav so the headline and CTAs always
   land above the fold. --nav-h must track the real nav height at each
   breakpoint; svh keeps it stable while mobile browser chrome moves. */
:root { --nav-h: 75px; }
.gk-hero {
  position: relative;
  height: calc(100vh - var(--nav-h));
  height: calc(100svh - var(--nav-h));
  min-height: 560px;
  max-height: 960px;
  overflow: hidden;
}
.gk-hero__media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.gk-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    to top,
    rgba(20, 26, 20, 0.65) 0%,
    rgba(20, 26, 20, 0.30) 55%,
    rgba(20, 26, 20, 0.125) 100%
  );
}
.gk-hero__inner {
  position: relative;
  z-index: 2;
  height: 100%;
  padding-bottom: 64px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  text-align: left;
}
.gk-hero__copy { max-width: 600px; }

.gk-overline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 2.2px;
  text-transform: uppercase;
  color: var(--color-primary-hover);
  margin-bottom: 16px;
}
.gk-overline--onimage { color: #fff; opacity: 0.9; }

.gk-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 44px;
  line-height: 50px;
  letter-spacing: -0.01em;
  color: #fff;
  margin: 0 0 16px;
}
.gk-hero p {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 24px;
  color: rgba(255, 255, 255, 0.88);
  margin: 0 0 24px;
  max-width: 460px;
}
.gk-btn-row { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Partner logos ---------- */
.gk-partners { padding-top: 80px; padding-bottom: 88px; }
.gk-partners__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 2.2px;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 28px;
}
.gk-logos {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  align-items: center;
}
.gk-logos img {
  width: 120px;
  height: 48px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  filter: grayscale(1);
  opacity: 0.62;
  /* Raster logos ship on a white plate; multiply drops it into the cream page
     the way the transparent SVGs already sit. */
  mix-blend-mode: multiply;
  transition: filter 0.15s ease, opacity 0.15s ease;
}
.gk-logos img:hover { filter: grayscale(0); opacity: 1; }
/* Stacked lockup rather than a wide wordmark: let it run taller so its optical
   weight matches the horizontal logos either side. */
.gk-logos img[alt="Best Energy"] { width: auto; height: 58px; }

/* ---------- Pillars ---------- */
.gk-pillars { padding-top: 80px; padding-bottom: 96px; }
.gk-section-head { text-align: center; margin-bottom: 56px; }
.gk-section-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 36px;
  color: var(--moss-900);
  margin: 0;
}
.gk-pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.gk-pillar { min-width: 0; }
.gk-pillar img {
  display: block;
  width: 100%;
  height: 480px;
  object-fit: cover;
  min-width: 0;
  margin-bottom: 20px;
  border-radius: 4px;
}
.gk-pillar h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  margin: 0 0 8px;
  color: var(--moss-900);
}
.gk-pillar p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 22px;
  color: var(--text-muted);
  margin: 0;
}
.gk-pillars__more { text-align: center; margin-top: 32px; }
.gk-pillars__more a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--color-primary-hover);
}
.gk-pillars__more a:hover { color: var(--moss-900); text-decoration: underline; }

/* ---------- Stats ---------- */
.gk-stats { background: var(--moss-900); padding: 80px 0; }
.gk-stats__grid--3 { grid-template-columns: repeat(3, 1fr); }
.gk-stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.gk-stat__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 44px;
  color: #fff;
}
.gk-stat__label {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--slate-300);
  margin-top: 8px;
}

/* ---------- Standards ---------- */
.gk-standards { padding: 88px 0 40px; text-align: center; }
.gk-standards .gk-overline { margin-bottom: 24px; }
.gk-standards__list {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Testimonial ---------- */
.gk-quote {
  padding: 56px 32px 96px;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.gk-quote blockquote {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  line-height: 34px;
  color: var(--moss-900);
  margin: 0 0 24px;
}
.gk-quote figcaption {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-muted);
}

/* ---------- Closing CTA ---------- */
.gk-cta {
  background: var(--stone-100);
  padding: 72px 32px;
  text-align: center;
}
.gk-cta h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  color: var(--moss-900);
  margin: 0 0 12px;
}
.gk-cta p {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--text-muted);
  margin: 0 0 28px;
}
.gk-cta .gk-btn-row { justify-content: center; }

/* ---------- Footer ---------- */
.gk-footer {
  background: var(--moss-900);
  color: var(--slate-300);
  padding: 64px 32px 32px;
}
.gk-footer__top {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
}
.gk-footer__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: #fff;
  margin-bottom: 8px;
}
.gk-footer__tagline {
  font-family: var(--font-body);
  font-size: 14px;
  max-width: 280px;
}
.gk-footer__cols {
  display: flex;
  gap: 64px;
  font-family: var(--font-body);
  font-size: 14px;
  flex-wrap: wrap;
}
.gk-footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.gk-footer__col h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: #fff;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin: 0 0 4px;
}
.gk-footer__col a { color: var(--slate-300); }
.gk-footer__col a:hover { color: #fff; text-decoration: underline; }
.gk-footer__bottom {
  max-width: var(--container-max);
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
  color: var(--slate-500);
}

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .gk-pillar-grid { grid-template-columns: repeat(2, 1fr); }
  .gk-pillar img { height: 360px; }
  .gk-stats__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .gk-wrap { padding-left: 20px; padding-right: 20px; }

  .gk-brand img { height: 26px; }
  .nav__toggle { display: block; }
  .nav__links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 20px 20px;
    background: var(--stone-100);
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav__links.open { display: flex; }
  .nav__links li { padding: 8px 0; }
  .nav__links .ds-btn { width: 100%; margin-top: 8px; }

  .gk-hero {
    --nav-h: 80px;
    min-height: 520px;
    max-height: none;
  }
  .gk-hero__inner { padding-bottom: 40px; }
  .gk-hero h1 { font-size: 34px; line-height: 40px; }

  .gk-partners { padding-top: 56px; padding-bottom: 56px; }
  .gk-logos { gap: 28px; }
  .gk-pillars { padding-top: 56px; padding-bottom: 64px; }
  .gk-section-head h2 { font-size: 28px; }
  .gk-section-head { margin-bottom: 36px; }
  .gk-pillar-grid { grid-template-columns: 1fr; }
  .gk-pillar img { height: 280px; }
  .gk-stats { padding: 56px 0; }
  .gk-stat__num { font-size: 34px; }
  .gk-standards { padding: 56px 0 32px; }
  .gk-quote { padding: 40px 20px 64px; }
  .gk-quote blockquote { font-size: 22px; line-height: 30px; }
  .gk-cta { padding: 56px 20px; }
  .gk-footer { padding: 48px 20px 24px; }
  .gk-footer__cols { gap: 32px; }
}

@media (max-width: 480px) {
  .gk-stats__grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .gk-btn-row .ds-btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .ds-btn, .gk-logos img { transition: none; }
  .ds-btn:hover { transform: none; }
}