:root {
  --card-bg: #ffffff;
  --body-bg: #f8f9fa;
  --text-main: #333;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--body-bg);
  color: var(--text-main);
  padding: 2rem;
  margin: 0;
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

footer {
  text-align: center;
  margin-top: 3rem;
}

#search {
  padding: 0.8rem;
  width: 100%;
  max-width: 400px;
  border: 1px solid #ddd;
  border-radius: 25px;
  margin-top: 1rem;
}

.student-grid {
  display: grid;
  /* This creates a fluid grid: cards are at least 250px wide */
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-5px);
}

.card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
}

.card-info {
  padding: 1.5rem;
  text-align: center;
}

.card-info h2 {
  margin: 0;
  font-size: 1.25rem;
}

.card-info p {
  color: #666;
  margin: 0.5rem 0 0;
}