.sn-wrapper {
  width: 100%;
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 16px;
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  box-sizing: border-box;
}
.sn-wrapper * {
  box-sizing: border-box;
}
.sn-header {
  text-align: center;
  margin-bottom: 24px;
}
.sn-header h3 {
  font-size: 1.1rem;
  color: #333;
  margin: 0 0 8px 0;
  letter-spacing: 0.05em;
  font-weight: bold;
}
.sn-header p {
  font-size: 0.85rem;
  color: #666;
  margin: 0;
}
.sn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.sn-card {
  display: flex;
  flex-direction: column;
  text-decoration: none !important;
  background: #fff;
  color: #333 !important;
  padding: 24px 20px;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  border: 1px solid #eaeaea;
}
.sn-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}
.sn-icon {
  width: 32px;
  height: 32px;
  margin-bottom: 16px;
  /* color set via js */
  color: #666;
  opacity: 0.9;
}
.sn-card-title {
  font-size: 0.75rem;
  color: #555;
  margin: 0 0 4px 0;
  letter-spacing: 0.05em;
  font-weight: bold;
}
.sn-card-name {
  font-size: 1.1rem;
  font-weight: bold;
  color: #333;
  margin: 0 0 8px 0;
  line-height: 1.3;
}
.sn-card-desc {
  font-size: 0.8rem;
  color: #444;
  margin: 0;
  line-height: 1.5;
}

/* レスポンシブ対応 */
@media (max-width: 600px) {
  .sn-grid {
    grid-template-columns: 1fr;
  }
}