/* ── Page Header ──────────────────────────────────────────── */
.page-header {
  padding: 40px 0 20px;
}
.page-header h1 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.page-header .subtitle {
  color: var(--text-dim);
  font-size: 1rem;
}

/* ── Puzzle Filters ──────────────────────────────────────── */
.puzzle-filters {
  margin-bottom: 24px;
}
.filter-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.filter-row label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 50px;
}

/* ── Sort controls ──────────────────────────────────────── */
.sort-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.sort-row select {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.82rem;
  font-family: var(--font-sans);
  color-scheme: light dark;
}

/* ── Puzzle Grid ─────────────────────────────────────────── */
.puzzle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  padding-bottom: 48px;
}

.puzzle-card {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px;
  transition: border-color 0.15s;
  cursor: pointer;
}
.puzzle-card:hover {
  border-color: var(--accent);
}

.puzzle-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.puzzle-type-name {
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: capitalize;
}
.puzzle-size {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.puzzle-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 0.78rem;
  color: var(--text-dim);
}
.puzzle-meta span {
  font-family: var(--font-mono);
}

.puzzle-ai-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
}
.puzzle-solve-rate {
  font-family: var(--font-mono);
  font-weight: 600;
}
.puzzle-solve-rate.high { color: var(--green); }
.puzzle-solve-rate.medium { color: var(--yellow); }
.puzzle-solve-rate.low { color: var(--text-muted); }
.puzzle-solve-rate.zero { color: var(--red); }

.puzzle-actions {
  display: flex;
  gap: 8px;
}
.puzzle-actions .btn {
  padding: 5px 12px;
  font-size: 0.78rem;
  border-radius: 3px;
}

/* ── Count badge ─────────────────────────────────────────── */
.puzzle-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}