body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans JP", sans-serif;
  background: #f4f6f8;
}
header {
  position: sticky;
  z-index: 1000;

  background: #1f2937;
  color: #fff;
  padding: 16px 24px;
  font-size: 20px;
  font-weight: bold;
}

main {
  padding: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  height: 100px;
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card h2 {
  font-size: 18px;
  margin: 0 0 8px 0;
}

.card p {
  font-size: 14px;
  color: #555;
  flex-grow: 1;
}

.card-link {
  text-decoration: none;
  color: inherit;
  display: block; /* カード全体をクリック可能にする */
}

.card-link:hover .card {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}

footer {
  text-align: center;
  padding: 16px;
  color: #777;
  font-size: 12px;
}