:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --accent-light: rgba(56, 189, 248, 0.1);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --border: #334155;
  --border-light: #475569;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* App Shell */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 20;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #38bdf8 0%, #3b82f6 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  color: #0f172a;
}

.brand-text h1 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #fff;
}

.brand-text span {
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav-menu {
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

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

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

.nav-item svg {
  width: 18px;
  height: 18px;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  background: #3b82f6;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.user-role {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: capitalize;
}

/* Main Content */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  overflow-x: hidden;
}

.topbar {
  height: 64px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-title {
  font-size: 18px;
  font-weight: 600;
}

.topbar-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--success-bg);
  color: var(--success);
  font-weight: 500;
}

.topbar-status::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.content-body {
  padding: 32px;
  flex: 1;
}

/* Cards & Grid */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
}

.stat-title {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
}

.stat-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* Panels & Tables */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  overflow: hidden;
}

.panel-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.panel-title {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

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

th {
  padding: 12px 20px;
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  vertical-align: middle;
}

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

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-a { background: #1e3a8a; color: #93c5fd; }
.badge-aaaa { background: #312e81; color: #c7d2fe; }
.badge-cname { background: #14532d; color: #86efac; }
.badge-mx { background: #713f12; color: #fde047; }
.badge-txt { background: #581c87; color: #d8b4fe; }
.badge-ns { background: #0c4a6e; color: #7dd3fc; }
.badge-soa { background: #374151; color: #d1d5db; }
.badge-caa { background: #701a75; color: #f0abfc; }
.badge-srv { background: #831843; color: #f472b6; }

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #0f172a;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

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

.btn-danger {
  background: var(--danger-bg);
  border-color: rgba(239, 68, 68, 0.4);
  color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

.btn-icon {
  padding: 6px;
  border-radius: var(--radius-sm);
}

/* Inputs & Form Controls */
.input, .select, .textarea {
  background: #0f172a;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: #fff;
  padding: 9px 12px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}

.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-light);
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 320px;
}

/* Filter pills */
.filters-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 12px 20px;
  background: rgba(15, 23, 42, 0.4);
  border-bottom: 1px solid var(--border);
}

.filter-pill {
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  transition: all 0.15s;
}

.filter-pill:hover, .filter-pill.active {
  background: var(--accent);
  color: #0f172a;
  border-color: var(--accent);
}

/* 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: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  transform: translateY(15px);
  transition: transform 0.2s ease;
}

.modal-overlay.active .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
}

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

.form-group {
  margin-bottom: 16px;
}

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

.form-help {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Login Page View */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 20%, #1e293b 0%, #0f172a 100%);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

/* Toast */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 100;
}

.toast {
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.2s ease;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }

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

/* Code Snippet block */
.code-box {
  background: #090d16;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: #38bdf8;
  overflow-x: auto;
  position: relative;
  margin: 10px 0;
}