/* ============================================================
   DevvMail — Dashboard Styles (Light Modern Theme)
   ============================================================ */

/* ---------- CSS Variables / Theme ---------- */
:root {
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-hover: #eef2f7;
  --bg-input: #f7f9fc;
  --border-color: #e2e8f0;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.10);
  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.12);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.12);
  --error: #f87171;
  --error-bg: rgba(248, 113, 113, 0.12);
  --info: #60a5fa;
  --info-bg: rgba(96, 165, 250, 0.10);
  --sidebar-width: 250px;
  --sidebar-collapsed-width: 68px;
  --header-height: 60px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.10);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-accent: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-success: linear-gradient(135deg, #34d399, #6ee7b7);
  --gradient-warm: linear-gradient(135deg, #fbbf24, #f59e0b);
  --gradient-rose: linear-gradient(135deg, #fb7185, #f43f5e);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; }

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* ---------- Login Page ---------- */
.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
  background: linear-gradient(160deg, #f0f4f8 0%, #e0e7ff 50%, #f0f4f8 100%);
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.login-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.login-card .subtitle {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 0.875rem;
}

.login-card .logo {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-card .logo span {
  background: none;
  -webkit-text-fill-color: var(--text-primary);
}

/* ---------- Form Elements ---------- */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.375rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-family);
  transition: border-color var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

select.form-control {
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8.825L0.575 3.4 1.4 2.575 6 7.175 10.6 2.575 11.425 3.4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-family);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background: var(--gradient-accent);
  filter: brightness(1.1);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

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

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

.btn-danger {
  background: linear-gradient(135deg, #fb7185, #f43f5e);
  color: #fff;
  box-shadow: 0 2px 8px rgba(244, 63, 94, 0.25);
}

.btn-danger:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 14px rgba(244, 63, 94, 0.35);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ---------- Layout (Sidebar + Main) ---------- */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  box-shadow: 2px 0 12px rgba(0, 0, 0, 0.03);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-logo {
  padding: 1rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  white-space: nowrap;
  min-height: 64px;
}

.sidebar-logo .logo-icon {
  flex-shrink: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-logo .logo-icon svg {
  width: 2.4rem;
  height: 2.4rem;
}

.sidebar-logo .logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  transition: opacity 0.2s ease, width 0.2s ease;
}

.sidebar-logo .logo-text .logo-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-toggle {
  margin-left: auto;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition);
}

.sidebar-toggle:hover {
  color: var(--accent);
}

.sidebar-nav {
  flex: 1;
  padding: 0.75rem 0;
}

.nav-section-label {
  padding: 0.5rem 1.5rem 0.25rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
}

.nav-section-label:not(:first-child) {
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
  border-left: 3px solid transparent;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-nav a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-nav a.active {
  background: var(--accent-light);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

.sidebar-nav a .nav-icon {
  width: 20px;
  min-width: 20px;
  text-align: center;
  font-size: 1rem;
}

.sidebar-nav a .nav-label {
  transition: opacity 0.2s ease;
}

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-footer .user-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.825rem;
}

.sidebar-footer .logout-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  font-size: 0.9rem;
  transition: color var(--transition);
  min-width: 20px;
}

.sidebar-footer .logout-btn:hover {
  color: var(--error);
}

/* ---------- Sidebar Collapsed State ---------- */
.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-logo {
  justify-content: center;
  padding: 1rem 0.5rem;
  position: relative;
}

.sidebar.collapsed .sidebar-logo .logo-icon svg {
  width: 2.8rem;
  height: 2.8rem;
}

.sidebar.collapsed .sidebar-logo .logo-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
  position: absolute;
}

.sidebar.collapsed .sidebar-toggle {
  width: auto;
  height: auto;
  font-size: 1.1rem;
  margin-left: 0;
  position: absolute;
  right: 4px;
  top: 22px;
  opacity: 0.45;
}

.sidebar.collapsed .sidebar-toggle:hover {
  opacity: 1;
}

.sidebar.collapsed .sidebar-nav a {
  justify-content: center;
  padding: 0.75rem 0;
  border-left: 3px solid transparent;
}

.sidebar.collapsed .sidebar-nav a .nav-icon {
  font-size: 1.15rem;
}

.sidebar.collapsed .sidebar-nav a .nav-label {
  opacity: 0;
  width: 0;
  overflow: hidden;
  position: absolute;
}

.sidebar.collapsed .nav-section-label {
  font-size: 0;
  padding: 0;
  margin: 0;
  border: none;
  height: 0;
  overflow: hidden;
}

.sidebar.collapsed .nav-section-label:not(:first-child) {
  margin-top: 0.25rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--border-color);
  height: auto;
}

.sidebar.collapsed .sidebar-footer {
  padding: 1rem 0.5rem;
  text-align: center;
}

.sidebar.collapsed .sidebar-footer .nav-label {
  display: none;
}

.sidebar.collapsed .sidebar-footer .user-info {
  justify-content: center;
}

.sidebar.collapsed + .main-content {
  margin-left: var(--sidebar-collapsed-width);
}

/* ---------- Main Content ---------- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

.page-header h1 {
  font-size: 1.375rem;
  font-weight: 700;
}

.page-header .page-description {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.page-body {
  padding: 1.5rem 2rem;
}

/* ---------- Stat Cards ---------- */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: all var(--transition);
  box-shadow: var(--shadow);
}

.stat-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px);
}

.stat-card .stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.stat-card .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
}

.stat-card .stat-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.375rem;
}

.stat-card.success .stat-value { color: #10b981; }
.stat-card.warning .stat-value { color: #f59e0b; }
.stat-card.error .stat-value { color: #f87171; }
.stat-card.info .stat-value { color: var(--accent); }

/* ---------- Charts Grid ---------- */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.chart-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.chart-card canvas {
  width: 100% !important;
  max-height: 280px;
}

/* ---------- Activity Feed ---------- */
.activity-section {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.activity-feed {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.activity-feed h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.activity-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-item .activity-time {
  color: var(--text-muted);
  font-size: 0.75rem;
  white-space: nowrap;
  font-family: var(--font-mono);
}

.activity-item .activity-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.activity-item .activity-status.sent { background: var(--success); box-shadow: 0 0 6px rgba(52, 211, 153, 0.5); }
.activity-item .activity-status.failed { background: var(--error); box-shadow: 0 0 6px rgba(248, 113, 113, 0.5); }
.activity-item .activity-status.fallback { background: var(--warning); box-shadow: 0 0 6px rgba(251, 191, 36, 0.5); }
.activity-item .activity-status.queued { background: var(--info); box-shadow: 0 0 6px rgba(96, 165, 250, 0.5); }

/* ---------- Health Indicators ---------- */
.health-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.health-panel h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.health-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.health-item:last-child {
  border-bottom: none;
}

.health-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.health-dot.ok { background: var(--success); box-shadow: 0 0 8px rgba(52, 211, 153, 0.5); }
.health-dot.warn { background: var(--warning); box-shadow: 0 0 8px rgba(251, 191, 36, 0.5); }
.health-dot.error { background: var(--error); box-shadow: 0 0 8px rgba(248, 113, 113, 0.5); }
.health-dot.unknown { background: var(--text-muted); }

/* ---------- Tables ---------- */
.data-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.data-table-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table-toolbar .filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.data-table-toolbar .filter-group label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.data-table-toolbar .filter-group select,
.data-table-toolbar .filter-group input {
  padding: 0.375rem 0.625rem;
  font-size: 0.825rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
}

table.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-input);
}

table.data-table td {
  padding: 0.625rem 1rem;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

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

/* ---------- Status Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.2rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-sent { background: #d1fae5; color: #059669; }
.badge-queued { background: #dbeafe; color: #3b82f6; }
.badge-sending { background: #e0e7ff; color: #6366f1; }
.badge-failed { background: #fee2e2; color: #dc2626; }
.badge-fallback_sent { background: #fef3c7; color: #d97706; }
.badge-fallback_failed { background: #fee2e2; color: #dc2626; }

.badge-self { background: #d1fae5; color: #059669; }
.badge-mailgun { background: #fef3c7; color: #d97706; }

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.pagination-buttons {
  display: flex;
  gap: 0.375rem;
}

.pagination-buttons button {
  padding: 0.375rem 0.75rem;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all var(--transition);
}

.pagination-buttons button:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.pagination-buttons button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---------- Domain DNS Cards ---------- */
.domain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.domain-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.domain-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ── Card sections (numbered) ── */
.card-section {
  border-top: 1px solid var(--border-color);
  padding: 0.85rem 0 0.5rem;
}
.card-section:first-of-type {
  border-top: none;
  padding-top: 0.5rem;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin-bottom: 0.5rem;
}
.section-heading-collapsible {
  cursor: pointer;
  user-select: none;
}
.section-heading-collapsible:hover {
  color: var(--text-primary);
}
.section-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.section-heading strong {
  font-size: 0.88rem;
}
.section-hint {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin: 0.15rem 0 0;
  line-height: 1.45;
  font-weight: 400;
}
.section-tag {
  font-size: 0.65rem;
  background: var(--accent-light);
  color: var(--accent);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
  vertical-align: middle;
  margin-left: 0.25rem;
}
.section-chevron {
  margin-left: auto;
  font-size: 0.65rem;
  color: var(--text-muted);
  flex-shrink: 0;
  padding-top: 0.2rem;
}

.dns-explain {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* ── Fallback toggle row (legacy) ── */
.fallback-toggle-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.35rem 0;
}
.fallback-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.fallback-label strong {
  color: var(--text-primary);
}

/* ── Prominent fallback box ── */
.fallback-box {
  border-radius: 10px;
  padding: 1rem 1.15rem;
  transition: all 0.2s;
}
.fallback-on {
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.08), rgba(99, 102, 241, 0.06));
  border: 1.5px solid var(--success);
}
.fallback-off {
  background: var(--bg-hover);
  border: 1.5px dashed var(--border-color);
}
.fallback-main {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}
.fallback-text {
  flex: 1;
}
.fallback-state {
  font-size: 0.9rem;
  display: block;
  margin-bottom: 0.2rem;
}
.fallback-state-on { color: #047857; }
.fallback-state-off { color: var(--text-muted); }
.fallback-explain {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}
.fallback-verification {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.65rem;
  padding-top: 0.55rem;
  border-top: 1px solid rgba(0,0,0,0.06);
  flex-wrap: wrap;
}
.fallback-badge {
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}
.fallback-badge-ok { background: var(--success-bg); color: #047857; }
.fallback-badge-pending { background: var(--warning-bg); color: #92400e; }
.fallback-badge-warn { background: var(--error-bg); color: #b91c1c; }
.fallback-badge-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ── Large toggle switch ── */
.fallback-toggle-lg {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
  cursor: pointer;
  margin-top: 2px;
}
.fallback-toggle-lg input {
  opacity: 0;
  width: 0;
  height: 0;
}
.fallback-slider-lg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #cbd5e1;
  border-radius: 26px;
  transition: background 0.25s;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}
.fallback-slider-lg:before {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.25s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}
.fallback-toggle-lg input:checked + .fallback-slider-lg {
  background: var(--success);
}
.fallback-toggle-lg input:checked + .fallback-slider-lg:before {
  transform: translateX(22px);
}

/* ── Domain actions (bottom) ── */
.domain-actions {
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}
.domain-action-hint {
  font-size: 0.73rem;
  color: var(--text-muted);
}

.btn-outline-muted {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-outline-muted:hover {
  border-color: var(--text-secondary);
  color: var(--text-secondary);
  background: var(--bg-hover);
}

.badge-paused {
  background: var(--warning-bg);
  color: #b45309;
}

.dns-record {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  font-size: 0.85rem;
}

/* ── Compact DNS chip grid ── */
.dns-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.dns-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: var(--bg-hover);
  color: var(--text-secondary);
}
.dns-chip-ok { background: var(--success-bg); border-color: var(--success); color: #047857; }
.dns-chip-fail { background: var(--error-bg); border-color: var(--error); color: #b91c1c; }
.dns-chip-warn { background: var(--warning-bg); border-color: var(--warning); color: #92400e; }
.dns-chip-unknown { background: var(--bg-hover); border-color: var(--border-color); color: var(--text-muted); }
.dns-chip .dns-help-btn {
  width: 18px;
  height: 18px;
  margin-left: 0.1rem;
}
.dns-chip .dns-help-btn svg {
  width: 11px;
  height: 11px;
}

.btn-xs {
  padding: 0.25rem 0.55rem;
  font-size: 0.72rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: auto;
}

.dns-help-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-hover);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.dns-help-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.dns-status { font-size: 1rem; }

.dns-record code {
  background: var(--bg-input);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  word-break: break-all;
  border: 1px solid var(--border-color);
}

/* ---------- Alerts / Toasts ---------- */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.alert-error { background: var(--error-bg); color: var(--error); border: 1px solid var(--error); }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid var(--success); }
.alert-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid var(--warning); }
.alert-info { background: var(--info-bg); color: var(--info); border: 1px solid var(--info); }

.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 300ms ease-out;
  max-width: 400px;
}

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

/* ---------- Slide-out Panel ---------- */
.slide-panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.3);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: none;
}

.slide-panel-overlay.open {
  display: block;
}

.slide-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 500px;
  max-width: 90vw;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  z-index: 201;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 300ms ease;
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.08);
}

.slide-panel.open {
  transform: translateX(0);
}

.slide-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.slide-panel-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.slide-panel-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
}

.slide-panel-body {
  padding: 1.25rem;
}

/* ---------- Event Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 1.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 1rem;
  padding-left: 1rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.5rem;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
  border: 2px solid var(--bg-card);
  box-shadow: 0 0 0 2px var(--border-color);
}

.timeline-item.sent::before { background: var(--success); }
.timeline-item.failed::before { background: var(--error); }
.timeline-item.queued::before { background: var(--info); }
.timeline-item.sending::before { background: var(--info); }
.timeline-item.fallback_sent::before { background: var(--warning); }
.timeline-item.fallback_failed::before { background: var(--error); }
.timeline-item.fallback_attempt::before { background: var(--warning); }
.timeline-item.retrying::before { background: var(--warning); }

.timeline-event {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.timeline-details {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.125rem;
}

.timeline-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ---------- Empty State ---------- */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.empty-state h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

/* ---------- Loading Spinner ---------- */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
  display: inline-block;
}

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

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  gap: 0.75rem;
  color: var(--text-secondary);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .activity-section {
    grid-template-columns: 1fr;
  }
  .charts-grid {
    grid-template-columns: 1fr;
  }
  .response-cols {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 300ms ease;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .page-body {
    padding: 1rem;
  }
  .stat-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Integration Page ---------- */
.integration-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.integration-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Credential rows */
.cred-grid {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.cred-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.cred-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  width: 100px;
  flex-shrink: 0;
}

.cred-value-wrap {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex: 1;
  min-width: 0;
}

.cred-value {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.375rem 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.cred-value.masked {
  color: var(--text-muted);
}

.copy-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.45rem;
  cursor: pointer;
  font-size: 0.85rem;
  line-height: 1;
  color: var(--text-secondary);
  transition: all var(--transition);
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.copy-btn svg {
  display: block;
}

.copy-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

/* Code blocks */
.code-block-wrap {
  position: relative;
}

.code-block-wrap .code-copy {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 1;
  opacity: 0;
  transition: opacity var(--transition);
}

.code-block-wrap:hover .code-copy {
  opacity: 1;
}

.code-block {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--text-primary);
  overflow-x: auto;
  white-space: pre;
  margin: 0;
}

.code-block.mini {
  padding: 0.5rem 0.75rem;
  font-size: 0.78rem;
  margin-top: 0.375rem;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0;
}

.tab {
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-family: var(--font-family);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.hidden {
  display: none !important;
}

/* Response columns */
.response-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ---------- DNS Setup Guide ---------- */
.dns-guide-record {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.dns-guide-record h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0.25rem 0 0.5rem;
  color: var(--text-primary);
}

.dns-guide-step {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.dns-guide-why {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0 0 1rem;
}

.dns-guide-fields {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.dns-field-row {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.dns-field-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.dns-field-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.dns-field-value {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.dns-field-code {
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 0.4rem 0.6rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  line-height: 1.5;
  word-break: break-all;
  flex: 1;
  color: var(--text-primary);
}

.dns-copy-btn {
  flex-shrink: 0;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 0.35rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
  white-space: nowrap;
}

.dns-copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.dns-field-explain {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.dns-field-explain strong {
  color: var(--text-secondary);
}

.dns-field-explain code {
  background: var(--bg-hover);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
}

.dns-guide-note {
  margin-top: 0.75rem;
  background: #eff6ff;
  border: 1px solid #93c5fd;
  border-radius: 6px;
  padding: 0.65rem 0.85rem;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.dns-guide-note code {
  background: rgba(0,0,0,0.06);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
}

/* ---------- Tracking Section ---------- */
.tracking-section {
  /* No longer used — sections now use .card-section */
}

.tracking-header {
  /* No longer used — replaced by .section-heading-collapsible */
}

.tracking-toggle {
  /* replaced by .section-chevron */
}

.tracking-summary {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: normal;
}

.tracking-body {
  padding: 0.75rem 0 0.25rem;
}

.tracking-group {
  margin-bottom: 1rem;
}

.tracking-group h4 {
  font-size: 0.84rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--text-primary);
}

.tracking-group h5 {
  font-size: 0.82rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--text-primary);
}

.field-hint {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.tracking-explainer {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin: 0.2rem 0 0.15rem;
  line-height: 1.4;
  font-style: italic;
}

.tracking-custom-box {
  background: var(--bg-hover);
  border-radius: 8px;
  padding: 0.85rem;
  margin-top: 0.35rem;
}

.tracking-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0 0 0.65rem;
  line-height: 1.4;
}

.tracking-field {
  margin-bottom: 0.6rem;
}

.tracking-field > label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.2rem;
  color: var(--text-secondary);
}

.tracking-field select,
.tracking-field input[type="text"] {
  max-width: 280px;
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
}

.tracking-field-inline {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.tracking-field-inline label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
}

.tracking-field-inline input[type="checkbox"] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
}

.tracking-note {
  background: var(--bg-hover);
  border-radius: 6px;
  padding: 0.65rem 0.85rem;
  font-size: 0.78rem;
  line-height: 1.6;
  margin-top: 0.5rem;
  color: var(--text-secondary);
}

.tracking-note code {
  background: rgba(0,0,0,0.06);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
}

.tracking-group-mg {
  border-top: 1px dashed var(--border-color);
  padding-top: 0.75rem;
}

/* ── Fallback toggle switch ── */
.fallback-toggle {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 18px;
  margin-left: 0.5rem;
  vertical-align: middle;
  cursor: pointer;
}
.fallback-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}
.fallback-slider {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #cbd5e1;
  border-radius: 18px;
  transition: background 0.2s;
}
.fallback-slider:before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 2px;
  bottom: 2px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}
.fallback-toggle input:checked + .fallback-slider {
  background: var(--accent);
}
.fallback-toggle input:checked + .fallback-slider:before {
  transform: translateX(16px);
}

/* ── Tracking subdomain verification ── */
.tracking-subdomain-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.75rem 0 0.5rem;
  flex-wrap: wrap;
}
.tracking-subdomain-status .dns-chip {
  font-size: 0.8rem;
  padding: 0.3rem 0.7rem;
}
.tracking-verify-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.5rem 0;
}
.tracking-verify-status {
  font-size: 0.8rem;
  font-weight: 600;
}
.tracking-verify-status.verified { color: var(--success); }
.tracking-verify-status.unverified { color: var(--error); }
.tracking-verify-status.pending { color: var(--warning); }

.tracking-verify-checks {
  background: var(--bg-hover);
  border-radius: 6px;
  padding: 0.6rem 0.85rem;
  margin: 0.4rem 0 0.6rem;
  font-size: 0.8rem;
}
.verify-check {
  padding: 0.15rem 0;
}
.verify-errors {
  margin-top: 0.4rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--border-color);
}
.verify-error {
  font-size: 0.78rem;
  color: var(--error);
  padding: 0.1rem 0;
}