/* ==========================================================================
   Admin Dashboard Styles - NVIDIA Free Gateway (Green Theme)
   ========================================================================== */

.admin-layout {
  display: flex;
  min-height: calc(100vh - 64px);
  width: 100%;
}

.admin-sidebar {
  width: 250px;
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}

.admin-menu {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.admin-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.admin-menu-item:hover {
  color: var(--text-main);
  background: var(--bg-card-hover);
}

.admin-menu-item.active {
  color: var(--primary-dark);
  background: var(--primary-soft);
  border-color: var(--primary-border);
  font-weight: 650;
}

:root[data-theme="dark"] .admin-menu-item.active {
  color: var(--primary);
}

.admin-menu-item .menu-count {
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--bg-card-hover);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 1px 8px;
}

.sidebar-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
  margin-top: 16px;
  font-size: 0.74rem;
  color: var(--text-sub);
  line-height: 1.7;
}

.admin-content {
  flex: 1;
  padding: 26px 32px;
  min-width: 0;
}

.admin-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.admin-section-header h2 {
  font-size: 1.4rem;
  font-weight: 750;
  letter-spacing: -0.01em;
}

.admin-section-header .section-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.admin-section-header .header-actions-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.admin-tab {
  display: none;
  animation: tabFade 0.25s ease;
}

.admin-tab.active {
  display: block;
}

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

/* ==========================================================================
   KPI Cards
   ========================================================================== */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 26px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
}

.kpi-card.kpi-success::before { background: var(--success); }
.kpi-card.kpi-warning::before { background: var(--warning); }
.kpi-card.kpi-danger::before  { background: var(--danger); }
.kpi-card.kpi-info::before    { background: var(--info); }

.kpi-title {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.kpi-value {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.kpi-sub {
  font-size: 0.75rem;
  color: var(--text-sub);
}

/* ==========================================================================
   Banner / alert
   ========================================================================== */

.alert-banner {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 0.86rem;
  line-height: 1.55;
}

.alert-banner.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: var(--text-main);
}

.alert-banner.alert-info {
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  color: var(--text-main);
}

.alert-banner strong {
  font-weight: 700;
}

/* ==========================================================================
   Login overlay
   ========================================================================== */

.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-page);
  padding: 20px;
}

.login-overlay.hidden {
  display: none;
}

.login-box {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 34px 32px;
  text-align: center;
}

.login-box .login-logo {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  margin: 0 auto 16px;
  display: block;
}

.login-box h1 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.login-box .login-sub {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 26px;
}

.login-box .form-group {
  text-align: left;
}

.login-error {
  display: none;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #dc2626;
  border-radius: var(--radius-sm);
  padding: 9px 13px;
  font-size: 0.82rem;
  margin-bottom: 14px;
  text-align: left;
}

/* ==========================================================================
   Bulk selection bar (chọn nhiều + hành động hàng loạt)
   ========================================================================== */

#bulk-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--primary-border);
  border-radius: 999px;
  padding: 10px 18px;
  box-shadow: var(--shadow-lg);
  z-index: 400;
  max-width: 92vw;
  flex-wrap: wrap;
  justify-content: center;
}

.bulk-count {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-right: 4px;
  white-space: nowrap;
}

.bulk-count strong {
  color: var(--primary-dark);
}

:root[data-theme="dark"] .bulk-count strong {
  color: var(--primary);
}

.admin-table .bulk-check {
  width: 15px;
  height: 15px;
  cursor: pointer;
  accent-color: var(--primary);
}



/* ==========================================================================
   Playground
   ========================================================================== */

.fallback-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 10px;
  background: var(--bg-input);
  min-height: 46px;
  align-items: center;
}

.fb-chip {
  padding: 5px 13px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.76rem;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  transition: all var(--transition-fast);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fb-chip:hover {
  border-color: var(--border-strong);
  color: var(--text-main);
}

.fb-chip.selected {
  background: var(--primary-soft);
  border-color: var(--primary-border);
  color: var(--primary-dark);
  font-weight: 600;
}

:root[data-theme="dark"] .fb-chip.selected {
  color: var(--primary);
}

.playground-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 18px;
  align-items: start;
}

.playground-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.playground-output {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  min-height: 460px;
}

.playground-output-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
}

.playground-output-body {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  max-height: 560px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.92rem;
  line-height: 1.7;
}

.playground-output-body .cursor-blink {
  display: inline-block;
  width: 8px;
  height: 17px;
  background: var(--primary);
  vertical-align: text-bottom;
  animation: blink 0.9s infinite;
  border-radius: 2px;
  margin-left: 2px;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.playground-stats {
  display: flex;
  gap: 18px;
  padding: 11px 18px;
  border-top: 1px solid var(--border-color);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.playground-stats strong {
  color: var(--text-main);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
}

@media (max-width: 1000px) {
  .playground-grid {
    grid-template-columns: 1fr;
  }
  .admin-sidebar {
    display: none;
  }
}