/* ═══════════════════════════════════════════════════
   Universal KMS — Premium Dark Theme
   ═══════════════════════════════════════════════════ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #101018;
  --bg-surface: #161620;
  --bg-card: #1a1a28;
  --bg-hover: #22223a;
  --bg-input: #12121e;

  --border: #2a2a40;
  --border-focus: #6366f1;

  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --gradient: linear-gradient(135deg, #6366f1, #a855f7);

  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --sidebar-width: 260px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Layout ── */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-brand .brand-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.sidebar-brand .brand-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sidebar-brand .brand-sub {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  margin: 2px 8px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  user-select: none;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.nav-item.active {
  background: var(--accent-glow);
  color: var(--accent);
  font-weight: 600;
}

.nav-item .nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.sidebar-footer .admin-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.admin-avatar {
  width: 36px;
  height: 36px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.admin-email {
  font-size: 12px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Main Content ── */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 32px;
  min-height: 100vh;
}

.page-header {
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
}

/* ── Stats Grid ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.stat-icon.blue { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.stat-icon.green { background: rgba(34, 197, 94, 0.15); color: #22c55e; }
.stat-icon.purple { background: rgba(168, 85, 247, 0.15); color: #a855f7; }
.stat-icon.orange { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.stat-icon.red { background: rgba(239, 68, 68, 0.15); color: #ef4444; }
.stat-icon.cyan { background: rgba(6, 182, 212, 0.15); color: #06b6d4; }
.stat-icon.indigo { background: rgba(99, 102, 241, 0.15); color: #6366f1; }

.stat-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--gradient);
  color: white;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--text-muted);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

.btn-success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
  justify-content: center;
}

/* ── Forms ── */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  transition: all var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder {
  color: var(--text-muted);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

/* ── Tables ── */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead {
  background: var(--bg-surface);
}

th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

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

tr:hover td {
  background: var(--bg-hover);
}

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.badge-success { background: rgba(34, 197, 94, 0.15); color: #22c55e; }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: #ef4444; }
.badge-info { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.badge-muted { background: rgba(100, 116, 139, 0.15); color: #94a3b8; }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.15s ease;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  width: 90%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  animation: slideUp 0.2s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: color var(--transition);
}

.modal-close:hover {
  color: var(--text);
}

.modal-footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ── Toast ── */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  animation: slideRight 0.3s ease;
  max-width: 380px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.toast-success { background: #065f46; color: #a7f3d0; border-left: 4px solid #22c55e; }
.toast-error { background: #7f1d1d; color: #fca5a5; border-left: 4px solid #ef4444; }
.toast-info { background: #1e3a5f; color: #93c5fd; border-left: 4px solid #3b82f6; }

/* ── Key Display ── */
.key-text {
  font-family: 'Courier New', monospace;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-hover);
  letter-spacing: 1px;
  user-select: all;
}

.key-copy {
  cursor: pointer;
  transition: opacity var(--transition);
}

.key-copy:hover {
  opacity: 0.7;
}

/* ── Copy Box ── */
.copy-box {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.copy-box code {
  font-family: 'Courier New', monospace;
  font-size: 13px;
  color: var(--accent-hover);
  word-break: break-all;
}

/* ── Generated Keys List ── */
.generated-keys {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  max-height: 300px;
  overflow-y: auto;
  margin-top: 12px;
}

.generated-keys .key-item {
  padding: 6px 0;
  border-bottom: 1px solid rgba(42, 42, 64, 0.5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.generated-keys .key-item:last-child {
  border-bottom: none;
}

/* ── Login Page ── */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 20px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.login-card .brand-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 20px;
}

.login-card h1 {
  font-size: 22px;
  margin-bottom: 8px;
}

.login-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}

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

.login-card .btn-primary {
  width: 100%;
  padding: 12px;
  font-size: 15px;
  margin-top: 8px;
}

/* ── Filter Bar ── */
.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.filter-bar .form-control {
  width: auto;
  min-width: 180px;
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-secondary);
}

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 15px;
}

/* ── Pagination ── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.pagination .btn {
  padding: 8px 14px;
  font-size: 13px;
}

.pagination .page-info {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ── Utility ── */
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-2 { gap: 16px; }
.gap-1 { gap: 8px; }
.hidden { display: none !important; }

/* ── Animations ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideRight {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ── Toggle Switch ── */
.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 12px;
  transition: all var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  bottom: 3px;
  left: 3px;
  background: white;
  border-radius: 50%;
  transition: all var(--transition);
}

.toggle input:checked + .toggle-slider {
  background: var(--accent);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: 20px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .filter-bar {
    flex-direction: column;
  }
  .filter-bar .form-control {
    width: 100%;
  }
}