.summary-grid {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.demo-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
  text-decoration: none;
  opacity: 0;
  translate: 0 14px;
  animation: cardIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.demo-card:nth-child(2) {
  animation-delay: 0.12s;
}

.demo-card:nth-child(3) {
  animation-delay: 0.24s;
}

@keyframes cardIn {
  to {
    opacity: 1;
    translate: 0 0;
  }
}

.demo-card:hover,
.demo-card:focus-visible {
  border-color: rgba(53, 208, 197, 0.5);
  transform: translateY(-4px);
  outline: none;
}

.demo-preview {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(8, 24, 36, 0.9), rgba(6, 18, 28, 0.95));
}

.preview-canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
}

.demo-body {
  display: grid;
  gap: 0.6rem;
  padding: 1.1rem 1.2rem 1.25rem;
}

.demo-body .badge {
  width: fit-content;
}

.demo-body h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.4rem;
}

.demo-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.demo-cta {
  color: var(--amber);
  font-weight: 600;
  font-size: 0.9rem;
  transition: letter-spacing 0.2s ease;
}

.demo-card:hover .demo-cta {
  letter-spacing: 0.02em;
}

@media (max-width: 560px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
}