.cover-url-preview {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-top: 16px;
  padding: 16px;
  border: 1px solid var(--line, #d9d5ca);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.48);
}

.cover-preview-frame {
  aspect-ratio: 2 / 3;
  width: 100%;
  overflow: hidden;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid var(--line, #d9d5ca);
  background: #f0eee7;
}

.cover-preview-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cover-preview-placeholder {
  padding: 14px;
  text-align: center;
  font-size: 12px;
  line-height: 1.5;
  color: #746f65;
}

.cover-preview-copy {
  min-width: 0;
}

.cover-preview-copy strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

.cover-preview-copy p {
  margin: 0 0 8px;
  color: #665f55;
  line-height: 1.55;
}

.cover-preview-copy small {
  display: block;
  margin-bottom: 10px;
  color: #7a746a;
}

.cover-preview-copy a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cover-url-preview[data-state="valid"] {
  border-color: #9eb6a4;
  background: #f3f8f3;
}

.cover-url-preview[data-state="valid"] .cover-preview-copy strong {
  color: #285336;
}

.cover-url-preview[data-state="invalid"] {
  border-color: #c9a09a;
  background: #fbf3f1;
}

.cover-url-preview[data-state="invalid"] .cover-preview-copy strong {
  color: #7b352d;
}

.cover-url-preview[data-state="checking"] .cover-preview-frame {
  background: linear-gradient(110deg, #efede6 8%, #f8f7f2 18%, #efede6 33%);
  background-size: 200% 100%;
  animation: cover-preview-pulse 1.4s linear infinite;
}

@keyframes cover-preview-pulse {
  to { background-position-x: -200%; }
}

@media (max-width: 640px) {
  .cover-url-preview {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 14px;
    padding: 12px;
  }
}