:root {
  --bg-color: #fdfdfd;
  --text-color: #000000;
  --main-color: #FF9800;
  --white-color: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.2);
}

body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  font-family: 'Arial', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background 0.5s ease, color 0.5s ease;
}

.dark-mode .certifications {
  background: var(--shadow-color);
  color: var(--white-color);
}

.certifications {
  padding: 100px 20px 20px;
  text-align: center;
  background: var(--bg-color);
  transition: background 0.5s ease, color 0.5s ease;
  color: var(--text-color);
}

.certifications h1 {
  font-size: 2rem;
  color: var(--text-color);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.dark-mode .certifications h1 {
  color: var(--white-color);
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 20px;
  width: 100%;
  height: calc(100vh - 160px);
}

.card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--main-color), var(--shadow-color));
  border-radius: 15px;
  color: var(--white-color);
  text-align: center;
  box-shadow: 0 4px 8px var(--shadow-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  padding: 20px;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 16px var(--shadow-color);
}

.card h2 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  color: var(--white-color);
  transition: color 0.3s ease;
}

.card p {
  font-size: 1rem;
  color: var(--white-color);
  transition: color 0.3s ease;
}

.dark-mode .card {
  background: linear-gradient(135deg, var(--shadow-color), var(--main-color));
  box-shadow: 0 4px 8px rgba(255, 255, 255, 0.2);
}

.dark-mode .card h2,
.dark-mode .card p {
  color: var(--white-color);
}

@media (max-width: 768px) {
  .certifications-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(3, 1fr);
  }
}

@media (max-width: 480px) {
  .certifications-grid {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(6, 1fr);
  }
}