.hero {
      position: relative;
      height: 70vh;
      width: 100%;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
    }

    .hero video {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: -1;
    }

    .overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 70, 30, 0.45); /* greenish overlay */
      z-index: 0;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 800px;
      padding: 20px;
    }

    .hero-content h1 {
      font-size: 3rem;
      font-weight: 700;
      margin-bottom: 15px;
      text-transform: uppercase;
      line-height: 1.2;
    }

    .hero-content p {
      font-size: 1.2rem;
      margin-bottom: 25px;
    }

    .hero-content .btn {
      padding: 12px 28px;
      background: #4CAF50;
      color: #fff;
      font-size: 1rem;
      border: none;
      border-radius: 25px;
      cursor: pointer;
      transition: 0.3s ease;
    }

    .hero-content .btn:hover {
      background: #388E3C;
    }

    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 2rem;
      }
      .hero-content p {
        font-size: 1rem;
      }
    }

      .certificates {
      padding: 60px 20px;
      text-align: center;
    }

    .certificates h2 {
      font-size: 2.5rem;
      margin-bottom: 10px;
      color: #2e7d32;
      font-weight: 700;
    }

    .certificates p {
      font-size: 1rem;
      color: #555;
      margin-bottom: 40px;
    }

   .certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 43px;
  max-width: 1339px;
  margin: auto;
}

    .certificate-card {
      background: #fff;
      border-radius: 12px;
      padding: 15px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .certificate-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    }

    .certificate-card img {
      width: 100%;
      height: 380px;
      object-fit: contain;
      border-radius: 8px;
      background: #f4f4f4;
    }

    .certificate-card h3 {
      margin-top: 15px;
      font-size: 1.2rem;
      color: #333;
    }