/**
 * NotifListener Gateway - Design System
 * Theme: Modern Dark Fintech / SaaS Dashboard
 * Primary Color: Deep Purple & Violet (#7c3aed)
 * Stack: Vanilla CSS with Custom Properties (Zero CSS Framework bloat)
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Brand / Primary Tokens (Purple Palette) */
  --color-primary-50: #faf5ff;
  --color-primary-100: #f3e8ff;
  --color-primary-200: #e9d5ff;
  --color-primary-300: #d8b4fe;
  --color-primary-400: #c084fc;
  --color-primary-500: #a855f7;
  --color-primary-600: #7c3aed; /* Primary Core */
  --color-primary-700: #6d28d9; /* Hover */
  --color-primary-800: #5b21b6;
  --color-primary-900: #4c1d95;
  --color-primary-glow: rgba(124, 58, 237, 0.35);

  /* Semantic Status Tokens */
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.12);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.12);
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.12);
  --color-info: #06b6d4;
  --color-info-bg: rgba(6, 182, 212, 0.12);

  /* Dark Theme Surfaces (Default) */
  --bg-app: #090d16;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-surface-hover: #27354f;
  --bg-glass: rgba(15, 23, 42, 0.75);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(168, 85, 247, 0.3);

  /* Typography */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #090d16;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout Measurements */
  --sidebar-width: 260px;
  --topbar-height: 70px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.5);
  --shadow-purple: 0 8px 25px -4px var(--color-primary-glow);
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode Overrides */
[data-theme="light"] {
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: #e2e8f0;
  --border-hover: var(--color-primary-300);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a {
  color: var(--color-primary-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-300);
}

/* Layout Architecture */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform var(--transition-normal);
}

.sidebar-brand {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-400));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 18px;
  box-shadow: var(--shadow-purple);
}

.brand-name {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(124, 58, 237, 0.2);
  color: var(--color-primary-300);
  border: 1px solid rgba(124, 58, 237, 0.3);
}

.sidebar-nav {
  flex: 1;
  padding: 20px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
  padding: 12px 12px 6px 12px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

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

.nav-link.active {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(168, 85, 247, 0.1));
  color: var(--color-primary-300);
  border-left: 3px solid var(--color-primary-600);
  font-weight: 600;
}

.nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.15);
}

.user-snippet {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4c1d95, #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 14px;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

/* Main Content Area */
.app-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Topbar */
.app-topbar {
  height: var(--topbar-height);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 90;
}

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

.mobile-toggle-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 20px;
  cursor: pointer;
}

.page-title-wrap h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.page-title-wrap p {
  font-size: 12px;
  color: var(--text-muted);
}

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

/* Page Container */
.page-container {
  padding: 32px;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Stat Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary-600), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.stat-card:hover::before {
  opacity: 1;
}

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

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: rgba(124, 58, 237, 0.12);
  color: var(--color-primary-400);
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 6px;
}

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

/* Card Component */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.card-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.card-body {
  padding: 24px;
}

.card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-500));
  color: #ffffff;
  box-shadow: var(--shadow-purple);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-600));
  transform: translateY(-1px);
  color: #ffffff;
}

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

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

.btn-danger {
  background: var(--color-danger);
  color: #ffffff;
}

.btn-danger:hover {
  background: #dc2626;
  color: #ffffff;
}

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

.btn-outline:hover {
  border-color: var(--color-primary-500);
  color: var(--color-primary-400);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 12px 24px;
  font-size: 15px;
  border-radius: var(--radius-md);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-purple {
  background: rgba(124, 58, 237, 0.15);
  color: var(--color-primary-300);
  border: 1px solid rgba(124, 58, 237, 0.3);
}

.badge-success {
  background: var(--color-success-bg);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-danger {
  background: var(--color-danger-bg);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-info {
  background: var(--color-info-bg);
  color: #38bdf8;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

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

.form-control, .form-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  transition: all var(--transition-fast);
}

.form-control:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
  background: var(--bg-surface);
}

.form-help {
  font-size: 11px;
  color: var(--text-muted);
}

/* Tables */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.table th {
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

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

.table tr:hover td {
  background: rgba(124, 58, 237, 0.04);
  color: var(--text-primary);
}

/* Alerts */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  margin-bottom: 20px;
}

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

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

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

/* Code Badge */
.code-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.3);
  color: var(--color-primary-300);
  border: 1px solid var(--border-color);
}

/* Responsive Mobile */
@media (max-width: 992px) {
  .app-sidebar {
    transform: translateX(-100%);
  }
  .app-sidebar.open {
    transform: translateX(0);
  }
  .app-main {
    margin-left: 0;
  }
  .mobile-toggle-btn {
    display: block;
  }
  .page-container {
    padding: 20px 16px;
  }
  .app-topbar {
    padding: 0 16px;
  }
}