:root {
  --primary-color: #3498db;
  --secondary-color: #2ecc71;
  --background-color: #f4f4f4;
  --text-color: #333;
  --card-background: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
}

header {
  background-color: var(--primary-color);
  color: white;
  text-align: center;
  padding: 2rem 1rem;
  border-bottom: 5px solid var(--secondary-color);
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
}

header h2 {
  margin: 0;
  font-weight: normal;
  font-size: 1.2rem;
}

section {
  padding: 2rem 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background-color: var(--card-background);
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow-color);
  padding: 1.5rem;
  transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px var(--shadow-color);
}

.card h3 {
  margin-top: 0;
  color: var(--primary-color);
}

.card ul {
  list-style: none;
  padding: 0;
}

.card li {
  margin-bottom: 10px;
}

.card a {
  text-decoration: none;
  color: var(--secondary-color);
  font-weight: bold;
  transition: color 0.2s;
}

.card a:hover {
  color: var(--primary-color);
}

footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 2rem;
  background-color: #333;
  color: #ccc;
}

#foot {
  text-align: center;
  margin-top: 2rem;
}

#foot a {
  text-decoration: none;
  color: var(--primary-color);
  font-weight: bold;
}