/* Phase 56-02 — Dataset Playground archive + detail styles */

/* --- Archive wrapper --- */
.ddna-playground-archive {
  padding: 2rem 0;
}
.ddna-playground-header h1 {
  font-size: 2.5rem;
  margin: 0 0 0.5rem;
}
.ddna-playground-subtitle {
  color: #6c757d;
  margin-bottom: 1.5rem;
}

/* --- Filter controls --- */
.ddna-playground-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}
.ddna-playground-controls input[type="search"],
.ddna-playground-controls select {
  min-width: 180px;
  padding: 0.5rem 0.75rem;
  border: 1px solid #ced4da;
  border-radius: 0.25rem;
  font-size: 0.95rem;
  background: #fff;
  color: #212529;
}
.ddna-playground-controls input[type="search"]:focus,
.ddna-playground-controls select:focus {
  outline: 2px solid #087f5b;
  outline-offset: 1px;
  border-color: #087f5b;
}

/* --- Grid --- */
.ddna-playground-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

/* --- Card --- */
.ddna-playground-card {
  border-radius: 0.5rem;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}
.ddna-playground-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}
.ddna-playground-card.hidden {
  display: none;
}
.ddna-playground-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}
.ddna-playground-card__cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #f1f3f5;
  display: block;
}
.ddna-playground-card__title {
  font-size: 1.1rem;
  line-height: 1.35;
  margin: 0.75rem 1rem 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ddna-playground-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.5rem;
  padding: 0 1rem 1rem;
  font-size: 0.85rem;
  align-items: center;
}
.ddna-playground-card__category {
  background: #e6fcf5;
  color: #087f5b;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  text-transform: capitalize;
}
.ddna-playground-card__format-badge {
  background: #e7f5ff;
  color: #1971c2;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.ddna-playground-card__difficulty {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: #495057;
  letter-spacing: 0.1em;
}
.ddna-playground-card__downloads {
  color: #6c757d;
  margin-left: auto;
}

/* --- Empty state --- */
.ddna-playground-empty {
  padding: 3rem 1rem;
  text-align: center;
  color: #6c757d;
  font-size: 1.05rem;
}

/* --- Mobile --- */
@media (max-width: 600px) {
  .ddna-playground-grid {
    grid-template-columns: 1fr;
  }
  .ddna-playground-controls {
    flex-direction: column;
  }
  .ddna-playground-controls input[type="search"],
  .ddna-playground-controls select {
    min-width: unset;
    width: 100%;
  }
  .ddna-playground-header h1 {
    font-size: 2rem;
  }
}

/* Phase 56-03 — single-playground_dataset.php rules */
.ddna-playground-single { padding: 2rem 0; }
.ddna-playground-single__header h1 { font-size: 2.25rem; margin: 0 0 0.75rem; }
.ddna-playground-single__meta { display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; font-size: 0.95rem; color: #495057; }
.ddna-playground-single__meta span { white-space: nowrap; }
.ddna-playground-single__tags { list-style: none; padding: 0; margin: 1rem 0 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.ddna-playground-single__tags li { background: #f1f3f5; color: #495057; padding: 0.25rem 0.75rem; border-radius: 999px; font-size: 0.85rem; }
.ddna-playground-single__cover img { max-width: 100%; height: auto; border-radius: 0.5rem; margin: 1.5rem 0; }
.ddna-playground-single__description { font-size: 1.1rem; line-height: 1.6; margin-bottom: 2rem; }
.ddna-playground-single__download { margin: 2rem 0; padding: 1.5rem; background: #f8f9fa; border-radius: 0.5rem; }
.ddna-playground-cta { display: inline-block; padding: 0.75rem 1.5rem; border-radius: 0.25rem; font-weight: 600; text-decoration: none; border: none; cursor: pointer; }
.ddna-playground-cta--signup { background: #1971c2; color: #fff; }
.ddna-playground-cta--verify { background: #f08c00; color: #fff; }
.ddna-playground-cta--download { background: #2b8a3e; color: #fff; }
.ddna-playground-cta--download:disabled { opacity: 0.6; cursor: not-allowed; }
.ddna-playground-attribution { margin-top: 1rem; font-size: 0.9rem; color: #6c757d; }
.ddna-playground-single__brief { margin: 2rem 0; }
.ddna-playground-single__brief h2 { font-size: 1.5rem; margin-bottom: 1rem; }
.ddna-playground-single__brief h3, .ddna-playground-single__brief h4 { margin-top: 1.5rem; }
.ddna-playground-single__brief ul, .ddna-playground-single__brief ol { padding-left: 1.5rem; }
.ddna-playground-archival { background: #fff4e6; border-left: 4px solid #f59f00; padding: 1rem 1.5rem; border-radius: 0.25rem; margin: 2rem 0; }
.ddna-playground-archival__note { margin: 0; color: #5c3d00; }
.ddna-playground-challenge { background: #e6fcf5; border-left: 4px solid #087f5b; padding: 1rem 1.5rem; border-radius: 0.25rem; margin: 2rem 0; }
.ddna-playground-try-cta { display: inline-block; padding: 0.75rem 1.5rem; background: #212529; color: #fff; border-radius: 0.25rem; font-weight: 600; text-decoration: none; }
.ddna-playground-try-cta:hover { background: #343a40; color: #fff; }