:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --sidebar: #0f172a;
  --sidebar-hover: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active: #f8fafc;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --success: #059669;
  --success-soft: #ecfdf5;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body.admin-body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-hover);
}

.admin-shell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 1.25rem 0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 1rem;
}

.sidebar-brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.85rem;
}

.sidebar-brand-text {
  font-weight: 700;
  font-size: 1.05rem;
  color: #f8fafc;
  line-height: 1.2;
}

.sidebar-brand-sub {
  font-size: 0.72rem;
  color: var(--sidebar-text);
  font-weight: 400;
}

.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 0 0.75rem;
}

.sidebar-nav li {
  margin-bottom: 2px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.sidebar-nav a:hover {
  background: var(--sidebar-hover);
  color: #e2e8f0;
}

.sidebar-nav a.active {
  background: rgba(99, 102, 241, 0.2);
  color: var(--sidebar-active);
}

.sidebar-nav-button {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--sidebar-text);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}

.sidebar-nav-button:hover {
  background: var(--sidebar-hover);
  color: #e2e8f0;
}

.sidebar-section {
  padding: 1rem 1.25rem 0.5rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  font-weight: 600;
}

.sidebar-tenant-name {
  padding: 0 1.25rem 0.75rem;
  font-size: 0.85rem;
  color: #cbd5e1;
  font-weight: 600;
  word-break: break-word;
}

/* Main */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.topbar-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.content {
  padding: 1.75rem;
  flex: 1;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.card-title {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 700;
}

.card-muted {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: -0.5rem 0 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--bg);
  color: var(--text);
}

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
}

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

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

table.data-table th,
table.data-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.data-table th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

table.data-table tbody tr:hover {
  background: #fafbfc;
}

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

.actions-cell {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
}

.badge-success {
  background: var(--success-soft);
  color: var(--success);
}

.badge-warning {
  background: var(--warning-soft);
  color: var(--warning);
}

.badge-muted {
  background: #f1f5f9;
  color: var(--text-muted);
}

/* Forms */
.form-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .form-grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.82rem;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* Alerts */
.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.alert-error {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid #fecaca;
}

.alert-success {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid #a7f3d0;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.empty-state h2 {
  margin: 0 0 0.5rem;
  color: var(--text);
  font-size: 1.1rem;
}

/* Code / pre */
pre.json-preview {
  margin: 0;
  padding: 0.75rem;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  max-width: 320px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

code.inline {
  background: #f1f5f9;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.82em;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--primary);
}

/* Success page */
.success-panel {
  max-width: 420px;
  margin: 2rem auto;
  text-align: center;
}

.success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--success-soft);
  color: var(--success);
  font-size: 2rem;
  line-height: 64px;
}

@media (max-width: 900px) {
  .admin-shell {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    padding-bottom: 0.5rem;
  }

  .sidebar-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  .sidebar-nav li {
    margin: 0;
  }
}