/* -----------------------------
   Premium Style: Volume by Year
----------------------------- */

.archive_by_year {
  font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
  background: #ffffff;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  max-width: 800px;
  margin: 0 auto;
}

/* Judul Tahun - Toggle */
.archive_by_year .toggle_archive {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f1f5f9;
  padding: 1rem 1.25rem;
  margin: 12px 0;
  border-radius: 8px;
  color: #1f2937;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  border-left: 5px solid #465d4b;
  transition: background 0.2s ease;
  position: relative;
}

.archive_by_year .toggle_archive:hover {
  background-color: #e2e8f0;
}

.archive_by_year .toggle_archive::after {
  content: "Year";
  font-size: 0.8rem;
  color: #6b7280;
  transition: transform 0.3s ease;
}

.archive_by_year .toggle_archive.active::after {
  transform: rotate(-180deg);
}

/* Daftar Edisi */
.archive_by_year .issue_list {
  background: #fdfdfd;
  padding: 0.75rem 1.25rem;
  margin-bottom: 8px;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  color: #374151;
  transition: all 0.2s ease;
  position: relative;
}

.archive_by_year .issue_list:hover {
  background-color: #f0f9ff;
  border-color: #b6d4fe;
  transform: translateX(4px);
}

/* Collapse container */
.archive_by_year .collapse.in {
  margin-bottom: 30px;
}

/* Tambahan: badge jumlah edisi (jika ingin tampilkan) */
.issue-badge {
  background: #465d4b;
  color: white;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  margin-left: auto;
}