:root {
  --primary-color: #5c67f2;
  --primary-hover: #6a74fa;
  --text-color: #333;
  --bg-light: #f9f9f9;
  --bg-main: #f4f4f4;
  --link-blue: #1a0dab;
  --link-hover: #5c67f2;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --transition: 0.3s ease;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* General Body Styling */
body {
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

/* Header Styling */
header {
  background-color: #333;
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

header h2 {
  margin-top: 0.25rem;
  font-weight: 400;
  font-size: 1.2rem;
}

/* Navigation Styling */
nav ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius);
  transition: background var(--transition);
}

nav ul li a:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

/* Links in Main */
main a {
  color: var(--link-blue);
  text-decoration: underline;
}

main a:hover {
  color: var(--link-hover);
}

/* Section Styling */
section {
  background-color: white;
  padding: 2rem;
  margin: 1.5rem auto;
  max-width: 900px;
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}

/* Button Styling */
button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  transition: background var(--transition), transform var(--transition);
}

button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

/* Certifications Section */
#certifications {
  margin-top: 2rem;
  text-align: center;
}

.certifications-content {
  display: none;
  background-color: var(--bg-light);
  padding: 1.5rem;
  margin-top: 1rem;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  animation: fadeIn var(--transition) forwards;
}

.certifications-content.visible {
  display: block !important;
}

.certification {
  margin: 1.5rem 0;
}

.certification img {
  max-width: 100%;
  height: auto;
  max-height: 280px;
  border-radius: var(--radius);
  border: 1px solid #ccc;
  box-shadow: var(--shadow);
}

.certification p {
  font-size: 0.9rem;
  color: #555;
  margin-top: 0.5rem;
}

/* GitHub Sections */
#github,
#github-stats {
  background-color: var(--bg-light);
  border: 1px solid #ddd;
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  margin: 1.5rem auto;
  max-width: 900px;
}

#github button,
#github-stats button {
  margin-top: 1rem;
}

/* GitHub Stats */
#github-stats img {
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Footer */
footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 3rem;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  section {
    padding: 1.5rem;
    margin: 1rem;
  }

  button {
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
  }

  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .certification img {
    max-width: 90%;
    max-height: 200px;
  }

  button {
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
  }
}