/* ==============================================================================
   Saarathi Fiber Broadband - Enterprise UI/UX Pro Max Design System 3.0
   Design Principles: Vercel/Stripe High-Tech Dashboard, Vibrant Palette, Glassmorphism, OLED Dark / Clean Crisp Light
   ============================================================================== */

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

:root {
  /* Color Palette - Dark Mode Default (Deep Cosmic Midnight) */
  --bg-primary: #090d16;
  --bg-surface: rgba(15, 23, 42, 0.8);
  --bg-surface-hover: rgba(30, 41, 59, 0.9);
  --bg-card: rgba(20, 30, 50, 0.7);
  --bg-card-hover: rgba(28, 41, 66, 0.85);
  --bg-input: rgba(11, 17, 31, 0.85);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-highlight: rgba(14, 165, 233, 0.45);
  --border-emerald: rgba(16, 185, 129, 0.45);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-cyan: #0ea5e9;
  --accent-cyan-glow: rgba(14, 165, 233, 0.25);
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #a855f7;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(14, 165, 233, 0.2);
  --shadow-emerald: 0 0 25px rgba(16, 185, 129, 0.25);
  
  --glass-backdrop: blur(16px) saturate(180%);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --sidebar-width: 260px;
  --header-height: 72px;
  --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-surface: rgba(255, 255, 255, 0.92);
  --bg-surface-hover: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-input: #f8fafc;
  
  --border-color: #e2e8f0;
  --border-subtle: #f1f5f9;
  --border-highlight: rgba(14, 165, 233, 0.4);
  --border-emerald: rgba(16, 185, 129, 0.4);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 25px -5px rgba(148, 163, 184, 0.2), 0 8px 10px -6px rgba(148, 163, 184, 0.1);
  --shadow-lg: 0 20px 30px -10px rgba(148, 163, 184, 0.25);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.15);
  --shadow-emerald: 0 0 20px rgba(16, 185, 129, 0.15);
}

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

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(14, 165, 233, 0.07) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(99, 102, 241, 0.06) 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

code, pre, input[style*="monospace"], textarea[style*="monospace"], .mono-text {
  font-family: 'JetBrains Mono', monospace !important;
}

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

a:hover {
  opacity: 0.85;
  color: #38bdf8;
}

/* Glassmorphism Panels & Cards */
.glass-panel {
  background: var(--bg-surface);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition-fast);
}

.glass-panel:hover {
  border-color: rgba(14, 165, 233, 0.25);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: var(--transition-bounce);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo));
  opacity: 0;
  transition: var(--transition-fast);
}

.glass-card:hover {
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
}

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

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

.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-surface);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  padding: 1.5rem 1rem;
}

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

.app-header {
  height: var(--header-height);
  background: var(--bg-surface);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 90;
}

.app-main-content {
  padding: 2rem;
  flex: 1;
}

/* Brand Logo Header */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.5rem 0.75rem;
  margin-bottom: 2rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
}

.brand-text {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

/* Navigation Items */
.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.925rem;
  transition: var(--transition-fast);
}

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

.nav-item.active a {
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.15), transparent);
  color: var(--accent-cyan);
  border-left: 3px solid var(--accent-cyan);
  box-shadow: inset 0 0 15px rgba(14, 165, 233, 0.05);
}

/* User & Theme Footer */
.user-profile {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(99, 102, 241, 0.2));
  color: var(--accent-cyan);
  border: 1px solid var(--border-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.theme-toggle-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.55rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--border-highlight);
  background: rgba(14, 165, 233, 0.1);
  transform: scale(1.05);
}

/* Buttons & Controls */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-bounce);
  user-select: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--border-highlight);
  background: var(--bg-surface-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--accent-rose), #e11d48);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
  box-shadow: 0 6px 16px rgba(244, 63, 94, 0.45);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, var(--accent-emerald), #059669);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
  border: none;
}

.btn-success:hover {
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
  transform: translateY(-2px);
}

/* Forms */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.925rem;
  font-family: inherit;
  transition: var(--transition-fast);
}

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

/* Badges & Status Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.badge-active {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.badge-expired {
  background: rgba(244, 63, 94, 0.15);
  color: #f43f5e;
  border: 1px solid rgba(244, 63, 94, 0.35);
}

.badge-pending {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.badge-sent {
  background: rgba(14, 165, 233, 0.15);
  color: #0ea5e9;
  border: 1px solid rgba(14, 165, 233, 0.35);
}

/* Data Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-sm);
}

.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  text-align: left;
}

.data-table th {
  background: rgba(0, 0, 0, 0.03);
  padding: 1rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .data-table th {
  background: rgba(255, 255, 255, 0.02);
}

.data-table td {
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: var(--transition-fast);
}

.data-table tbody tr:hover {
  background: rgba(14, 165, 233, 0.03);
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.metric-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.metric-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.metric-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
}

.metric-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.metric-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

/* Initial Avatar Circles */
.avatar-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(99, 102, 241, 0.2));
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-highlight);
}

/* Pulsing Status Dot */
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Responsive */
@media (max-width: 768px) {
  .app-sidebar {
    width: 70px;
    padding: 1rem 0.5rem;
  }
  .brand-text, .nav-text, .user-name {
    display: none;
  }
  .app-main {
    margin-left: 70px;
  }
  .app-main-content {
    padding: 1rem;
  }
}