.admin {
  height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  background: var(--bg);
}

.admin-side {
  background: #171717;
  color: #fff;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.admin-brand {
  padding: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-brand img {
  height: 34px;
}

.admin-nav {
  padding: 12px;
  display: grid;
  gap: 4px;
}

.admin-nav button {
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.62);
  border-radius: 8px;
  padding: 11px 12px;
  text-align: left;
  font-weight: 800;
}

.admin-nav button.active,
.admin-nav button:hover {
  background: var(--red);
  color: #fff;
}

.admin-main {
  min-width: 0;
  overflow: auto;
}

.admin-head {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.admin-content {
  padding: 24px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filters input,
.filters select {
  min-height: 38px;
  border: 1px solid #d9dee7;
  border-radius: 8px;
  padding: 0 10px;
  background: #fff;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.metric-card,
.panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(16, 24, 40, 0.04);
}

.metric-card {
  padding: 18px;
}

.metric-card button {
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 0;
}

.metric-inline {
  text-align: left;
  cursor: pointer;
}

.metric-card strong {
  display: block;
  font-size: 30px;
  margin-bottom: 4px;
}

.metric-detail {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
  color: #667085;
  font-size: 13px;
  max-height: 230px;
  overflow: auto;
}

.panel {
  padding: 18px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 820px;
}

th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
  font-size: 14px;
}

th {
  background: #fbfcfd;
  color: #667085;
  font-size: 12px;
  text-transform: uppercase;
}

tr.clickable:hover {
  background: #fff8f7;
}

tr.alert-row {
  background: #fff4f3;
}

.name-cell {
  display: grid;
  gap: 4px;
}

.sub {
  color: #98a2b3;
  font-size: 12px;
}

.inline-select {
  border: 1px solid #d9dee7;
  border-radius: 8px;
  min-height: 34px;
  padding: 0 8px;
  background: #fff;
  max-width: 220px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.editor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.list-grid {
  display: grid;
  gap: 12px;
}

.course-admin-card {
  display: grid;
  grid-template-columns: 128px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.course-admin-card img {
  width: 128px;
  height: 78px;
  object-fit: cover;
  border-radius: 8px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.55);
  display: grid;
  place-items: center;
  padding: 20px;
  cursor: pointer;
}

.modal {
  width: min(920px, 100%);
  max-height: min(86vh, 920px);
  overflow: auto;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
  cursor: default;
}

.modal-head {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.modal-body {
  padding: 22px;
}

.modal-close {
  width: 44px;
  height: 44px;
  font-size: 24px;
  line-height: 1;
  color: #111827;
}

.history-list {
  display: grid;
  gap: 10px;
  max-height: 240px;
  overflow: auto;
}

.history-item {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  font-size: 13px;
  line-height: 1.6;
}

.empty {
  padding: 32px;
  text-align: center;
  color: #98a2b3;
  border: 1px dashed #d0d5dd;
  border-radius: 8px;
  background: #fff;
}

#toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 200;
  display: grid;
  gap: 8px;
}

.toast {
  padding: 12px 14px;
  border-radius: 8px;
  background: #111827;
  color: #fff;
  box-shadow: var(--shadow);
  font-size: 14px;
}

.mobile-menu {
  display: none;
}