:root {
  --font-primary: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Color Palette */
  --bg-dark: #0a0f1d;
  --bg-card: rgba(18, 25, 44, 0.75);
  --bg-card-hover: rgba(26, 36, 62, 0.85);
  --bg-input: rgba(13, 20, 36, 0.9);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  
  --primary: #2563eb;
  --primary-light: #60a5fa;
  --primary-glow: rgba(37, 99, 235, 0.35);
  
  --accent: #06b6d4;
  --accent-glow: rgba(6, 182, 212, 0.35);
  
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.25);
  
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.25);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.12) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(15, 23, 42, 0.6) 0px, transparent 100%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(10, 15, 29, 0.5);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

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

/* Sidebar */
.app-sidebar {
  width: 280px;
  background: rgba(13, 20, 36, 0.85);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
}

.brand-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px var(--primary-glow);
  font-size: 22px;
}

.brand-info h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-info span {
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.nav-menu {
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
}

.nav-item i {
  font-size: 1.15rem;
  width: 22px;
  text-align: center;
}

.nav-item:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.25), rgba(6, 182, 212, 0.1));
  border-left: 3px solid var(--accent);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.status-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
}

/* Main Content */
.main-wrapper {
  margin-left: 280px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-bar {
  height: 72px;
  padding: 0 36px;
  background: rgba(10, 15, 29, 0.6);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 90;
}

.page-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.content-body {
  padding: 32px 36px;
  flex: 1;
}

/* Tab Panels */
.tab-panel {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards & Glassmorphism */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-glow);
  margin-bottom: 24px;
  transition: var(--transition);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.badge-primary {
  background: rgba(37, 99, 235, 0.2);
  color: var(--primary-light);
  border: 1px solid rgba(37, 99, 235, 0.3);
}

.badge-success {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* Form Controls */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group label .req {
  color: var(--danger);
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.92rem;
  transition: var(--transition);
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #1d4ed8);
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-1px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), #0891b2);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-success {
  background: var(--success);
  color: #fff;
  box-shadow: 0 4px 14px var(--success-glow);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.82rem;
}

/* Result Box / Response Viewer */
.response-box {
  background: #060913;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85rem;
  color: #e2e8f0;
  max-height: 420px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  margin-top: 14px;
}

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

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

.data-table th {
  background: rgba(255, 255, 255, 0.04);
  padding: 12px 16px;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.data-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Alerts */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  color: #fff;
  box-shadow: var(--shadow-glow);
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  animation: slideUp 0.3s ease;
}

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

/* Settings Page Styles */
.settings-nav {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 12px;
  overflow-x: auto;
}

.settings-tab-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  white-space: nowrap;
}

.settings-tab-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.2);
}

.settings-tab-btn.active {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(6, 182, 212, 0.25));
  border-color: var(--primary-light);
  color: #fff;
  box-shadow: 0 0 15px var(--primary-glow);
}

.input-with-action {
  position: relative;
  display: flex;
  align-items: center;
}

.input-with-action .form-control {
  padding-right: 42px;
}

.input-action-btn {
  position: absolute;
  right: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.input-action-btn:hover {
  color: var(--primary-light);
}

.webhook-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}

.webhook-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
}

.webhook-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.webhook-title {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.webhook-url {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.82rem;
  color: var(--accent);
  background: rgba(6, 182, 212, 0.08);
  padding: 3px 8px;
  border-radius: 4px;
  word-break: break-all;
}

.diag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.diag-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.diag-title {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.diag-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

@media (max-width: 1024px) {
  .app-sidebar { width: 80px; }
  .brand-info, .nav-item span, .sidebar-footer span { display: none; }
  .nav-item { justify-content: center; padding: 14px; }
  .main-wrapper { margin-left: 80px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}