/* Administrator Content page: chapter list, exercise table and the exercise editor drawer. */

/* ---------- layout ---------- */
.page-admin-content .content-split {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
.page-admin-content .content-chapters { min-width: 0; }
.page-admin-content .content-exercises { min-width: 0; }
.page-admin-content .chapter-panel-title { margin-bottom: 8px; }
.page-admin-content .content-table-head { margin-bottom: 6px; align-items: flex-start; }
.page-admin-content .content-count { margin: 2px 0 0; }
.page-admin-content .publishing-note { margin: 0 0 10px; }

/* ---------- chapter list ---------- */
.page-admin-content .chapter-list { overflow: hidden; }
.page-admin-content .chapter-item { display: block; padding: 0; border-bottom: 1px solid var(--border); }
.page-admin-content .chapter-item:last-child { border-bottom: 0; }
.page-admin-content .chapter-item.is-selected { box-shadow: inset 3px 0 0 var(--accent); }
.page-admin-content .chapter-pick {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  margin: 0;
  padding: 10px 12px 6px;
  border: 0;
  background: none;
  color: var(--text);
  text-align: left;
  font: inherit;
  cursor: pointer;
}
.page-admin-content .chapter-pick:hover { background: var(--surface-2); }
.page-admin-content .chapter-pick:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.page-admin-content .chapter-pick[aria-current="true"] { background: var(--accent-soft); }
.page-admin-content .chapter-pick[aria-current="true"] .chapter-title { color: var(--accent); }
.page-admin-content .chapter-pick-all { padding-bottom: 10px; }
.page-admin-content .chapter-order {
  flex: 0 0 22px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  padding-top: 2px;
}
.page-admin-content .chapter-main { flex: 1; min-width: 0; display: block; }
.page-admin-content .chapter-main .cell-sub { display: block; font-size: 12.5px; color: var(--text-3); margin-top: 2px; }
.page-admin-content .chapter-title { display: block; font-weight: 500; }
.page-admin-content .chapter-objective { white-space: normal; color: var(--text-2); }
.page-admin-content .chapter-counts { margin-top: 4px; }
.page-admin-content .chapter-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 0 8px 6px 36px;
}
.page-admin-content .chapter-actions .btn-sm { height: 26px; padding: 0 6px; font-size: 12.5px; }
.page-admin-content .chapter-actions .chapter-delete:not(:disabled) { color: var(--err); }
.page-admin-content .chapter-actions .chapter-delete:not(:disabled):hover { background: var(--err-soft); }

/* ---------- exercise table ---------- */
.page-admin-content .content-table { min-width: 900px; }
.page-admin-content .content-table .col-order { width: 84px; white-space: nowrap; }
.page-admin-content .content-table .col-title { min-width: 200px; }
.page-admin-content .content-table .col-level { width: 72px; white-space: nowrap; }
.page-admin-content .content-table .col-topic { width: 120px; }
.page-admin-content .content-table .col-kind { width: 110px; }
.page-admin-content .content-table .col-status { width: 130px; }
.page-admin-content .content-table .col-version { width: 66px; white-space: nowrap; }
.page-admin-content .content-table .col-updated { width: 92px; white-space: nowrap; }
.page-admin-content .content-table .col-actions { width: 180px; white-space: nowrap; }

.page-admin-content .order-cell { display: flex; align-items: center; gap: 10px; }
.page-admin-content .order-num { display: inline-block; min-width: 14px; color: var(--text-2); }
.page-admin-content .order-moves { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }
.page-admin-content .row-action { font-size: 12.5px; line-height: 1.3; }
.page-admin-content .row-action:disabled { color: var(--text-3); text-decoration: none; }
.page-admin-content .row-actions { display: flex; align-items: center; gap: 10px; }
.page-admin-content .row-actions .row-action { white-space: nowrap; }
.page-admin-content .content-table .cell-sub.mono { font-size: 12px; }
.page-admin-content .content-table .cell-chapter { color: var(--text-2); }
.page-admin-content .status-cell { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; }

.publish-error-list { margin: 8px 0 0; padding-left: 20px; color: var(--text-2); }
.publish-error-list li { margin-bottom: 4px; }

/* ---------- exercise editor drawer ---------- */
.ex-drawer .drawer-header { gap: 12px; }
.ex-drawer .drawer-title { flex-shrink: 0; }
.ex-drawer .ex-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: 12.5px;
  color: var(--text-3);
}
.ex-drawer .ex-meta .mono { font-size: 12px; }
.ex-drawer .drawer-body { padding: 0; position: relative; }
.ex-drawer .ex-editor { min-height: 100%; }
.ex-drawer .ex-subnav {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 2px 4px;
  padding: 8px 14px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.ex-drawer .ex-subnav-link {
  border: 0;
  background: none;
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
}
.ex-drawer .ex-subnav-link:hover { background: var(--surface-3); color: var(--text); }
.ex-drawer .ex-body-inner { padding: 18px 18px 28px; }
.ex-drawer .ex-errors { margin-bottom: 16px; }
.ex-drawer .ex-errors:empty { display: none; }
.ex-drawer .ex-errors:focus { outline: none; }
.ex-drawer .ex-error-list { margin: 6px 0 0; padding-left: 20px; }
.ex-drawer .ex-error-list li { margin-bottom: 3px; }

.ex-drawer .ex-section { padding-bottom: 8px; margin-bottom: 22px; border-bottom: 1px solid var(--border); }
.ex-drawer .ex-section:last-child { border-bottom: 0; margin-bottom: 0; }
.ex-drawer .ex-section-title { font-size: 15px; margin-bottom: 12px; }
.ex-drawer .ex-section-title:focus { outline: none; }
.ex-drawer .ex-section-title:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.ex-drawer .ex-subsection-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 4px 0 10px;
}
.ex-drawer .ex-section > p.small { margin: -4px 0 12px; }

.ex-drawer .ex-rows { margin-bottom: 10px; }
.ex-drawer .ex-rows-empty { margin: 0 0 10px; }
.ex-drawer .ex-row {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  padding: 10px 12px 0;
  margin-bottom: 10px;
}
.ex-drawer .ex-row-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.ex-drawer .ex-row-title { font-size: 13px; font-weight: 600; color: var(--text-2); }
.ex-drawer .ex-row .grid-2 { gap: 0 14px; }

.ex-drawer .ex-admin-block {
  border: 1px solid #f1dfae;
  background: #fffcf2;
  border-radius: var(--radius-lg);
  padding: 14px;
}
.ex-drawer .ex-admin-block .notice { margin-bottom: 14px; }
.ex-drawer .ex-admin-block .ex-row { background: var(--surface); }

.ex-drawer .ex-footer { justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.ex-drawer .ex-footer-left, .ex-drawer .ex-footer-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .page-admin-content .content-split { grid-template-columns: 260px minmax(0, 1fr); gap: 16px; }
  .page-admin-content .chapter-actions { padding-left: 12px; }
}
@media (max-width: 900px) {
  .page-admin-content .content-split { grid-template-columns: 1fr; }
  .page-admin-content .content-table { min-width: 820px; }
}
@media (max-width: 640px) {
  .ex-drawer .ex-body-inner { padding: 14px 14px 24px; }
  .ex-drawer .ex-meta { display: none; }
  .ex-drawer .ex-footer-right { width: 100%; }
}