:root {
  --eco-green: #000000;
  --eco-dark: #196815;
  --bg: #ffffff;
}

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: var(--bg);
  color: #130303;
  font-size: 18px;
  scroll-behavior: smooth;
}

/* Header */
.simple-header {
  text-align: center;
  padding: 40px 20px 20px;
  background: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.header-logo {
  width: 90px;
  height: auto;
}

.header-text h1 {
  margin: 0;
  font-size: 2rem;
  color: var(--eco-dark);
}

.header-text p {
  margin: 5px 0 0;
  font-size: 1.1rem;
  color: var(--eco-green);
  font-weight: 500;
}

/* Certificates */
.container {
  width: 90%;
  max-width: 1280px;
  margin: auto;
  text-align: center;
}

.certificates h2 {
  font-size: 1.9rem;
  color: var(--eco-dark);
  margin-top: 40px;
  margin-bottom: 10px;
}

.certificates .sub {
  color: #0a0a0a;
  margin-bottom: 30px;
  line-height: 1.6;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  justify-items: center;
}

.cert-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
  padding: 20px;
  text-align: center;
  width: 100%;
  max-width: 360px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 14px rgba(0,0,0,0.08);
}

.cert-card h3 {
  font-size: 1.2rem;
  margin-bottom: 6px;
  color: var(--eco-dark);
}

.cert-card p {
  font-size: 1rem;
  color: #252525;
  margin-bottom: 10px;
}

.cert-card img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid #e5e5e5;
}

/* Scrollable */
.scroll-container {
  max-height: 450px;
  overflow-y: scroll;
  scrollbar-width: none;
}

.scroll-container::-webkit-scrollbar {
  display: none;
}

/* Quality Section */
.quality-section {
  background-color: #f4f9f4;
  padding: 50px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 12px;
  margin: 50px auto;
  width: 100%;
  max-width: 1200px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.quality-content {
  text-align: center;
  max-width: 900px;
}

.quality-content h3 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #196815;
  margin-bottom: 15px;
}

.quality-content p {
  font-size: 1rem;
  line-height: 1.8;
  color: #4b6350;
}

/* Footer */
.footer {
  text-align: center;
  padding: 50px 20px;
  background: #e9f5ec;
  margin-top: 40px;
}

.footer img {
  width: 75px;
  height: auto;
}

.footer p {
  max-width: 800px;
  margin: 15px auto;
  color: #333;
  font-size: 1rem;
  line-height: 1.6;
}

.website-link {
  display: inline-block;
  background: var(--eco-green);
  color: white;
  padding: 12px 18px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s;
}

.website-link:hover {
  background: var(--eco-dark);
}

/* Responsive */
@media (max-width: 1024px) {
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .cert-grid {
    grid-template-columns: 1fr;
  }

  .header-logo {
    width: 80px;
  }

  .header-text h1 {
    font-size: 1.4rem;
  }

  .header-text p {
    font-size: 0.9rem;
  }

  .quality-content h3 {
    font-size: 1.3rem;
  }

  .quality-content p {
    font-size: 0.95rem;
  }
}