/* ── Custom Properties ─────────────────────────────── */
:root {
  --clr-green-primary: #1a8c4e;
  --clr-green-dark:    #0d4a2a;
  --clr-green-light:   #f0faf4;
  --clr-green-mid:     #e2f5ea;
  --clr-text-primary:  #1a202c;
  --clr-text-secondary:#4a5568;
  --clr-white:         #ffffff;
  --clr-border:        #c6e8d4;

  --font-base: 'Inter', sans-serif;
  --radius-card: 8px;
  --radius-btn:  4px;
  --max-width:   1200px;
  --section-pad: 80px 24px;
}

/* ── Reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-base);
  color: var(--clr-text-primary);
  line-height: 1.6;
  background: var(--clr-white);
}
img { max-width: 100%; display: block; }
a   { text-decoration: none; color: inherit; }
ul  { list-style: none; }

/* ── Utility ──────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-green-primary);
  margin-bottom: 12px;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--clr-text-primary);
  margin-bottom: 12px;
}
.section-subtitle {
  color: var(--clr-text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 48px;
}

/* ── Buttons ──────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
  border: none;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--clr-green-primary); outline-offset: 2px; }
.btn--light   { background: var(--clr-white); color: var(--clr-green-dark); }
.btn--primary { background: var(--clr-green-primary); color: var(--clr-white); }

/* Offset anchor scroll for fixed nav */
section[id] { scroll-margin-top: 68px; }

/* ── Nav ──────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--clr-white);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--clr-green-dark);
}
.nav__links { display: flex; gap: 36px; }
.nav__links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--clr-text-secondary);
  transition: color 0.2s;
}
.nav__links a:hover { color: var(--clr-green-primary); }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text-primary);
  transition: transform 0.3s, opacity 0.3s;
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 767px) {
  .nav__hamburger { display: flex; }
  .nav__links {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--clr-white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    font-size: 1.3rem;
    z-index: 99;
  }
  .nav__links.open { display: flex; }
}

/* ── Hero ──────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--clr-green-dark) 0%, var(--clr-green-primary) 100%);
  padding-top: 68px;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(255,255,255,0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.hero__content {
  position: relative;
  z-index: 1;
  padding: var(--section-pad);
  max-width: 700px;
}
.hero__eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  margin-bottom: 16px;
}
.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--clr-white);
  margin-bottom: 24px;
}
.hero__sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.7;
}

/* ── About ──────────────────────────────────────────── */
.about {
  padding: var(--section-pad);
  background: var(--clr-green-light);
}
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about__body {
  color: var(--clr-text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.stat-card {
  background: var(--clr-white);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 2px 8px rgba(26,140,78,0.08);
}
.stat-card__num {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--clr-green-primary);
  line-height: 1;
}
.stat-card__label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--clr-text-secondary);
}

@media (max-width: 1023px) {
  .about__inner { grid-template-columns: 1fr; gap: 40px; }
}

/* ── Products ──────────────────────────────────────── */
.products {
  padding: var(--section-pad);
  background: var(--clr-white);
}
.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-top: 4px solid var(--clr-green-primary);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  transition: box-shadow 0.25s, transform 0.25s;
}
.product-card:hover {
  box-shadow: 0 8px 32px rgba(26,140,78,0.12);
  transform: translateY(-4px);
}
.product-card__icon { margin-bottom: 20px; }
.product-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-text-primary);
  margin-bottom: 12px;
}
.product-card__desc {
  font-size: 0.92rem;
  color: var(--clr-text-secondary);
  line-height: 1.75;
}

@media (max-width: 1023px) {
  .products__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .products__grid { grid-template-columns: 1fr; }
}

/* ── Certifications ──────────────────────────────── */
.certs {
  padding: var(--section-pad);
  background: var(--clr-green-light);
}
.certs__row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.cert-badge {
  display: inline-flex;
  align-items: center;
  padding: 10px 28px;
  border: 2px solid var(--clr-green-primary);
  border-radius: 40px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--clr-green-dark);
  background: var(--clr-white);
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s;
  cursor: default;
}
.cert-badge:hover {
  background: var(--clr-green-primary);
  color: var(--clr-white);
}

/* ── Contact ──────────────────────────────────────── */
.contact {
  padding: var(--section-pad);
  background: var(--clr-white);
}
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact__detail { margin-bottom: 28px; }
.contact__detail-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-green-primary);
  margin-bottom: 6px;
}
.contact__link {
  color: var(--clr-text-primary);
  font-weight: 600;
  transition: color 0.2s;
}
.contact__link:hover { color: var(--clr-green-primary); }
.contact__address {
  font-style: normal;
  color: var(--clr-text-secondary);
  line-height: 1.7;
}

/* ── Form ────────────────────────────────────────── */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--clr-text-primary);
}
.form-group input,
.form-group textarea {
  font-family: var(--font-base);
  font-size: 0.95rem;
  padding: 12px 16px;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-card);
  color: var(--clr-text-primary);
  background: var(--clr-white);
  transition: border-color 0.2s, box-shadow 0.2s;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--clr-green-primary);
  box-shadow: 0 0 0 3px rgba(26,140,78,0.12);
}
.form-success {
  display: none;
  color: var(--clr-green-primary);
  font-weight: 600;
  font-size: 0.95rem;
}
.form-success.visible { display: block; }

@media (max-width: 1023px) {
  .contact__inner { grid-template-columns: 1fr; gap: 40px; }
}

/* ── Footer ──────────────────────────────────────── */
.footer {
  background: var(--clr-green-dark);
  padding: 32px 24px;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--clr-white);
}
.footer__copy {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}
.footer__email {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.75);
  transition: color 0.2s;
}
.footer__email:hover { color: var(--clr-white); }

@media (max-width: 767px) {
  .footer__inner { flex-direction: column; align-items: flex-start; gap: 12px; }
}