/* ============================================================
   ADMIN DASHBOARD STYLES — GCSE Revision Platform
   Klara Zitova · REDFROGBLACK LIMITED
   ============================================================ */

/* ---- Layout ---- */
.admin-dashboard {
  min-height: 100vh;
  background: #0a0a0f;
  font-family: 'General Sans', sans-serif;
  color: #e4e5ea;
}

/* ---- Top bar ---- */
.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: #0d0f1a;
  border-bottom: 1px solid #1a1d2e;
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.admin-topbar-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.admin-topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.admin-brand-icon {
  font-size: 1.25rem;
}

.admin-brand-title {
  font-family: 'Chillax', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  line-height: 1.2;
}

.admin-brand-sub {
  font-size: 0.68rem;
  color: #4b5563;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.admin-user-badge {
  background: #1a1d2e;
  border: 1px solid #2a2d3a;
  border-radius: 9999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.78rem;
  color: #9ca3af;
}

/* ---- Tabs ---- */
.admin-tabs {
  display: flex;
  gap: 0;
  padding: 0.75rem 1.25rem 0;
  background: #0d0f1a;
  border-bottom: 1px solid #1a1d2e;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.admin-tabs::-webkit-scrollbar { display: none; }

.admin-tab-btn {
  flex-shrink: 0;
  padding: 0.625rem 1.1rem;
  background: none;
  border: none;
  border-bottom: 2.5px solid transparent;
  color: #6b7280;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  margin-bottom: -1px;
}

.admin-tab-btn:hover {
  color: #e4e5ea;
  background: rgba(255,255,255,0.03);
}

.admin-tab-btn.active {
  color: #00d4aa;
  border-bottom-color: #00d4aa;
  background: rgba(0,212,170,0.04);
}

/* ---- Content area ---- */
.admin-content {
  padding: 1.25rem;
  max-width: 1400px;
  margin: 0 auto;
}

/* ---- Loading / error ---- */
.admin-loading-state {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #6b7280;
  padding: 3rem 1rem;
  justify-content: center;
  font-size: 0.9rem;
}

.admin-spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(0,212,170,0.2);
  border-top-color: #00d4aa;
  border-radius: 50%;
  animation: adminSpin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes adminSpin { to { transform: rotate(360deg); } }

.admin-error {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: 10px;
  color: #f87171;
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
}

.admin-empty {
  color: #4b5563;
  font-size: 0.85rem;
  padding: 1.5rem 0;
  text-align: center;
}

/* ---- Section label ---- */
.admin-kpi-section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #4b5563;
  margin: 1.25rem 0 0.5rem;
}

.admin-kpi-section-label:first-child {
  margin-top: 0;
}

/* ---- KPI grid ---- */
.admin-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.admin-kpi-card {
  background: #12152a;
  border: 1px solid #1e2237;
  border-radius: 12px;
  padding: 1rem 1.1rem;
  transition: border-color 0.15s, transform 0.15s;
}

.admin-kpi-card:hover {
  border-color: #2a2d4a;
  transform: translateY(-1px);
}

.admin-kpi-value {
  font-family: 'Chillax', sans-serif;
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  display: block;
}

.admin-kpi-label {
  font-size: 0.75rem;
  color: #6b7280;
  margin-top: 0.2rem;
  font-weight: 500;
}

.admin-kpi-sub {
  font-size: 0.68rem;
  color: #4b5563;
  margin-top: 0.15rem;
}

/* ---- Cards ---- */
.admin-card {
  background: #12152a;
  border: 1px solid #1e2237;
  border-radius: 14px;
  padding: 1.1rem 1.25rem;
}

.admin-card-title {
  font-weight: 700;
  font-size: 0.875rem;
  color: #c9cad8;
  margin-bottom: 1rem;
  letter-spacing: 0.01em;
}

/* ---- Charts grid ---- */
.admin-charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.25rem;
}

.admin-charts-grid > .admin-card[style*="span 2"] {
  grid-column: 1 / -1;
}

@media (max-width: 760px) {
  .admin-charts-grid {
    grid-template-columns: 1fr;
  }
  .admin-charts-grid > .admin-card[style*="span 2"] {
    grid-column: 1;
  }
}

/* ---- Tables ---- */
.admin-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 8px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.admin-table th {
  text-align: left;
  padding: 0.5rem 0.625rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #4b5563;
  border-bottom: 1px solid #1e2237;
  white-space: nowrap;
}

.admin-table td {
  padding: 0.5rem 0.625rem;
  border-bottom: 1px solid #111420;
  vertical-align: middle;
  color: #9ca3af;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background: rgba(255,255,255,0.015);
}

/* ---- Buttons ---- */
.admin-btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.7rem;
  background: #1a1d2e;
  border: 1px solid #2a2d3a;
  border-radius: 8px;
  color: #9ca3af;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.admin-btn-sm:hover {
  background: #1e2237;
  color: #00d4aa;
  border-color: #00d4aa40;
}

.admin-select-sm {
  padding: 0.3rem 0.5rem;
  background: #1a1d2e;
  border: 1px solid #2a2d3a;
  border-radius: 8px;
  color: #9ca3af;
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  outline: none;
}

.admin-select-sm:focus { border-color: #00d4aa; }
.admin-select-sm option { background: #1a1d2e; }

.admin-btn-approve {
  padding: 0.3rem 0.7rem;
  background: rgba(52,211,153,0.1);
  border: 1px solid rgba(52,211,153,0.3);
  border-radius: 8px;
  color: #34d399;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.admin-btn-approve:hover {
  background: rgba(52,211,153,0.2);
  border-color: #34d399;
}

.admin-btn-reject {
  padding: 0.3rem 0.7rem;
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: 8px;
  color: #f87171;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.admin-btn-reject:hover {
  background: rgba(239,68,68,0.15);
  border-color: #f87171;
}

/* ---- Filter buttons ---- */
.admin-filter-btn {
  padding: 0.25rem 0.625rem;
  background: #1a1d2e;
  border: 1px solid #2a2d3a;
  border-radius: 8px;
  color: #6b7280;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.admin-filter-btn.active,
.admin-filter-btn:hover {
  background: rgba(0,212,170,0.1);
  border-color: #00d4aa40;
  color: #00d4aa;
}

/* ---- Links ---- */
.admin-link {
  color: #60a5fa;
  font-size: 0.75rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.35rem;
}
.admin-link:hover { color: #93c5fd; text-decoration: underline; }

/* ============================================================
   FUNNEL TAB
   ============================================================ */

.admin-funnel-layout {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.admin-funnel {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.admin-funnel-step {
  display: grid;
  grid-template-columns: 200px 1fr 160px;
  gap: 0.75rem;
  align-items: center;
  padding: 0.5rem 0;
}

@media (max-width: 600px) {
  .admin-funnel-step {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

.admin-funnel-label-left {
  font-size: 0.82rem;
  color: #9ca3af;
  font-weight: 600;
  text-align: right;
  padding-right: 0.5rem;
}

.admin-funnel-bar-wrap {
  background: #0d0f1a;
  border-radius: 6px;
  height: 38px;
  overflow: hidden;
}

.admin-funnel-bar {
  height: 100%;
  border-radius: 6px;
  display: flex;
  align-items: center;
  padding: 0 0.75rem;
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  min-width: 40px;
}

.admin-funnel-count {
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  white-space: nowrap;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.admin-funnel-meta {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.admin-funnel-pct-total {
  font-size: 0.78rem;
  font-weight: 700;
}

.admin-funnel-pct-prev {
  font-size: 0.72rem;
}

.admin-funnel-connector {
  text-align: center;
  padding: 0.15rem 0 0.15rem 200px;
}

/* Metric list */
.admin-metric-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.admin-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid #111420;
}

.admin-metric-row:last-child { border-bottom: none; }

.admin-metric-label {
  font-size: 0.8rem;
  color: #6b7280;
  flex: 1;
}

.admin-metric-value {
  font-size: 0.85rem;
  font-weight: 700;
  text-align: right;
}

/* Cohort grid */
.admin-cohort-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.admin-cohort-cell {
  background: #0d0f1a;
  border: 1px solid #1e2237;
  border-radius: 10px;
  padding: 0.625rem 0.5rem;
  text-align: center;
  border-left-width: 3px;
}

.admin-cohort-val {
  font-family: 'Chillax', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
}

.admin-cohort-lbl {
  font-size: 0.65rem;
  color: #6b7280;
  margin-top: 0.2rem;
  line-height: 1.3;
}

/* ============================================================
   SCHOOLS TAB
   ============================================================ */

.admin-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

/* ============================================================
   CONTENT TAB
   ============================================================ */

.admin-content-tables {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

/* ============================================================
   FEEDBACK TAB
   ============================================================ */

.admin-feedback-layout {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.admin-feedback-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  max-height: 600px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.admin-feedback-list::-webkit-scrollbar { width: 4px; }
.admin-feedback-list::-webkit-scrollbar-track { background: transparent; }
.admin-feedback-list::-webkit-scrollbar-thumb { background: #2a2d3a; border-radius: 2px; }

.admin-feedback-item {
  background: #0d0f1a;
  border: 1px solid #1e2237;
  border-radius: 10px;
  padding: 0.75rem 0.875rem;
  transition: border-color 0.15s;
}

.admin-feedback-item:hover { border-color: #2a2d4a; }

.admin-feedback-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
  gap: 0.5rem;
}

.admin-feedback-type {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.admin-feedback-date {
  font-size: 0.7rem;
  color: #4b5563;
}

.admin-feedback-msg {
  font-size: 0.82rem;
  color: #c9cad8;
  line-height: 1.5;
}

.admin-feedback-user {
  font-size: 0.68rem;
  color: #4b5563;
  margin-top: 0.35rem;
}

/* Reviews */
.admin-review-card {
  background: #0d0f1a;
  border: 1px solid #1e2237;
  border-radius: 10px;
  padding: 0.75rem 0.875rem;
}

.admin-review-comment {
  font-size: 0.82rem;
  color: #c9cad8;
  line-height: 1.5;
  font-style: italic;
}

/* ============================================================
   SYSTEM HEALTH TAB
   ============================================================ */

.admin-db-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.625rem;
}

.admin-db-cell {
  background: #0d0f1a;
  border: 1px solid #1e2237;
  border-radius: 10px;
  padding: 0.75rem 0.625rem;
  text-align: center;
}

.admin-db-count {
  font-family: 'Chillax', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #00d4aa;
}

.admin-db-table {
  font-size: 0.65rem;
  color: #4b5563;
  margin-top: 0.2rem;
  word-break: break-word;
  line-height: 1.3;
}

.admin-health-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

@media (max-width: 800px) {
  .admin-health-grid { grid-template-columns: 1fr; }
  .admin-funnel-connector { padding-left: 0; }
  .admin-funnel-label-left { text-align: left; }
}

/* ============================================================
   ADMIN BUTTON IN HEADER
   ============================================================ */

.admin-nav-btn {
  background: linear-gradient(135deg, rgba(0,212,170,0.15), rgba(124,58,237,0.15));
  border: 1px solid rgba(0,212,170,0.3);
  border-radius: 8px;
  color: #00d4aa;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.admin-nav-btn:hover {
  background: linear-gradient(135deg, rgba(0,212,170,0.25), rgba(124,58,237,0.25));
  border-color: #00d4aa;
}

/* ---- Fade-in animation ---- */
.admin-dashboard.fade-in {
  animation: adminFadeIn 0.25s ease;
}

@keyframes adminFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}