:root {
  --bg-main: #090d16;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 34, 52, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.25);
  
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Background Atmosphere Glows */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
}

.bg-glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #6366f1 0%, transparent 70%);
  top: -150px;
  right: -100px;
}

.bg-glow-2 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #06b6d4 0%, transparent 70%);
  bottom: -100px;
  left: 200px;
}

.grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

/* Main Layout Grid */
.app-layout {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
  width: 270px;
  background: rgba(13, 17, 27, 0.85);
  backdrop-filter: blur(16px);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 28px 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.brand-info h2 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.badge-tag {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 24px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.15), rgba(99, 102, 241, 0.05));
  border-color: rgba(99, 102, 241, 0.3);
  color: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.nav-item.active svg {
  color: var(--primary);
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

.api-target label {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.api-target input {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 6px 8px;
  font-family: var(--font-mono);
}

/* Content Area */
.main-content {
  flex: 1;
  padding: 32px 40px;
  overflow-y: auto;
  max-width: 1400px;
}

/* Topbar Header */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-title h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.page-title p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

.topbar-actions {
  display: flex;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: white;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  color: white;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
  padding: 14px;
  font-size: 0.95rem;
}

/* Tab Views */
.tab-view {
  display: none;
  animation: fadeIn 0.25s ease-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Metrics Cards Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: transform 0.2s ease, border-color 0.2s ease;
  box-shadow: var(--shadow-card);
}

.metric-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.16);
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.metric-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.metric-icon {
  font-size: 1.25rem;
}

.metric-value {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.metric-hint {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }

/* Banner Card */
.card-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(6, 182, 212, 0.08));
  border: 1px solid var(--border-glow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 24px;
  padding: 24px;
}

.banner-content h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.banner-content p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  max-width: 800px;
  line-height: 1.5;
}

.banner-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tech-pill {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  color: #a5b4fc;
}

/* Generic Card */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  margin-bottom: 24px;
}

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

.card-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.card-header p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 4px;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.data-table th {
  padding: 12px 16px;
  color: var(--text-muted);
  font-weight: 500;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
}

.data-table tbody tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

.loading-cell {
  text-align: center;
  padding: 32px !important;
  color: var(--text-muted);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-sent, .badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-queued, .badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-sending {
  background: rgba(6, 182, 212, 0.15);
  color: #22d3ee;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.badge-failed, .badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Controls & Inputs */
.logs-controls {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  flex: 1;
  min-width: 250px;
}

.search-box input {
  background: transparent;
  border: none;
  color: white;
  width: 100%;
  outline: none;
  font-family: var(--font-sans);
  font-size: 0.88rem;
}

select {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
}

/* Forms */
.form-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input, .form-group textarea {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: white;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-group textarea {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  resize: vertical;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--primary);
}

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

/* Grid 2 Columns */
.grid-2-cols {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

/* Response Viewer */
.response-viewer {
  background: #030712;
  border-radius: var(--radius-md);
  padding: 16px;
  height: 380px;
  overflow-y: auto;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.response-viewer code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #38bdf8;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Domains Card */
.domain-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  background: rgba(0, 0, 0, 0.2);
  margin-bottom: 16px;
}

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

.domain-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.domain-name {
  font-size: 1.2rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.dns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.dns-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.dns-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.dns-value code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #cbd5e1;
  word-break: break-all;
}

.dns-status {
  margin-top: 10px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-ok { color: var(--success); }
.status-err { color: var(--danger); }

/* Toasts */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
}

.toast {
  background: rgba(18, 24, 38, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  color: white;
  box-shadow: var(--shadow-card);
  font-size: 0.88rem;
  animation: slideIn 0.3s ease;
}

.toast-success { border-left-color: var(--success); }
.toast-danger { border-left-color: var(--danger); }

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

@media (max-width: 900px) {
  .app-layout { flex-direction: column; }
  .sidebar { width: 100%; }
  .grid-2-cols { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}