/* ==============================================================================
   NexNode VPS Dashboard - Master Design System
   Dark Glassmorphism, Cyber-Sleek Accents, Responsive Layout & Micro-Animations
   ============================================================================== */

:root {
  /* Color Palette */
  --bg-primary: #070a13;
  --bg-secondary: #0d1222;
  --bg-surface: rgba(18, 26, 47, 0.7);
  --bg-surface-hover: rgba(28, 39, 70, 0.75);
  --bg-card: rgba(15, 23, 42, 0.65);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-card-border-glow: rgba(6, 182, 212, 0.3);

  /* Brand / Neon Accents */
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.35);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.3);
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.3);
  --accent-amber: #f59e0b;
  --accent-amber-glow: rgba(245, 158, 11, 0.3);
  --accent-rose: #f43f5e;
  --accent-rose-glow: rgba(244, 63, 94, 0.3);

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #030712;

  /* Font Families */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', Courier, monospace;

  /* Glassmorphism & Shadows */
  --glass-blur: blur(16px);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 35px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 25px var(--accent-cyan-glow);

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
}

/* Custom Sleek Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: rgba(10, 15, 28, 0.7);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* App Shell Layout */
#app-root {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--bg-card-border);
  display: flex;
  flex-direction: column;
  z-index: 20;
  transition: width var(--transition-normal);
  backdrop-filter: var(--glass-blur);
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--bg-card-border);
}

.logo-badge {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--accent-cyan-glow);
}

.logo-badge svg {
  width: 22px;
  height: 22px;
  color: #fff;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #fff, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.sidebar-nav {
  padding: 1.25rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
  overflow-y: auto;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  cursor: pointer;
}

.nav-link svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
}

.nav-link:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.05);
}

.nav-link:hover svg {
  transform: scale(1.1);
  color: var(--accent-cyan);
}

.nav-link.active {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.3);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.15);
  font-weight: 600;
}

.nav-link.active svg {
  color: var(--accent-cyan);
}

/* Sidebar Footer / Connection Status */
.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--bg-card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald-glow);
  position: relative;
}

.pulse-dot::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 1.5px solid var(--accent-emerald);
  animation: pulsePing 2s infinite ease-in-out;
}

.pulse-dot.disconnected {
  background-color: var(--accent-rose);
  box-shadow: 0 0 8px var(--accent-rose-glow);
}
.pulse-dot.disconnected::after {
  border-color: var(--accent-rose);
}

@keyframes pulsePing {
  0% { transform: scale(0.8); opacity: 0.8; }
  50% { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(0.8); opacity: 0; }
}

/* Main Content Area */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Top Navbar */
.topbar {
  height: 64px;
  min-height: 64px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--bg-card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.75rem;
  backdrop-filter: var(--glass-blur);
  z-index: 10;
}

.topbar-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--bg-card-border);
}

.ticker-item strong {
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-surface);
  border: 1px solid var(--bg-card-border);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
}

.user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  color: #fff;
}

.btn-icon {
  background: var(--bg-surface);
  border: 1px solid var(--bg-card-border);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-surface-hover);
  color: var(--accent-rose);
  border-color: rgba(244, 63, 94, 0.3);
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

/* Page Containers */
.page-container {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 1.75rem;
  display: none;
}

.page-container.active {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

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

/* Cards & Grid System */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

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

.card-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-title svg {
  width: 18px;
  height: 18px;
  color: var(--accent-cyan);
}

.card-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--bg-card-border);
}

.metric-highlight {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  font-family: var(--font-mono);
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.metric-unit {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.07);
  overflow: hidden;
  margin-bottom: 0.85rem;
}

.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.5s ease-in-out;
}

.progress-cyan { background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan)); }
.progress-purple { background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple)); }
.progress-emerald { background: linear-gradient(90deg, #059669, var(--accent-emerald)); }
.progress-amber { background: linear-gradient(90deg, #d97706, var(--accent-amber)); }
.progress-rose { background: linear-gradient(90deg, #e11d48, var(--accent-rose)); }

.metric-subdetails {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.metric-subdetails span strong {
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* Canvas Chart Container */
.chart-container {
  width: 100%;
  height: 80px;
  position: relative;
  margin-top: 0.5rem;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* Multi-core CPU Grid */
.cores-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.core-item {
  background: rgba(0, 0, 0, 0.25);
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-card-border);
  text-align: center;
}

.core-label {
  font-size: 0.68rem;
  color: var(--text-muted);
}

.core-value {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Tables Styling */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--bg-card-border);
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
}

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

.modern-table th {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--bg-card-border);
}

.modern-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

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

.modern-table tr:last-child td {
  border-bottom: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
  color: #fff;
  box-shadow: 0 0 15px var(--accent-cyan-glow);
}
.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 20px var(--accent-cyan-glow);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--bg-card-border);
}
.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
  background: linear-gradient(135deg, var(--accent-rose), #be123c);
  color: #fff;
  box-shadow: 0 0 15px var(--accent-rose-glow);
}
.btn-danger:hover {
  filter: brightness(1.15);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.78rem;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.82);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.active {
  display: flex;
  animation: fadeIn 0.2s ease-out;
}

.modal-box {
  background: #0d1326;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 540px;
  box-shadow: var(--shadow-lg), 0 0 35px rgba(6, 182, 212, 0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--bg-card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.5rem;
  line-height: 1;
}
.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  max-height: 75vh;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--bg-card-border);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
}

/* Form Controls */
.form-group {
  margin-bottom: 1.15rem;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.95rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan-glow);
  background: rgba(255, 255, 255, 0.07);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: #0f172a;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.88rem;
  color: var(--text-primary);
  animation: slideInRight 0.3s ease-out;
  min-width: 280px;
}

.toast.success { border-left: 4px solid var(--accent-emerald); }
.toast.error { border-left: 4px solid var(--accent-rose); }
.toast.info { border-left: 4px solid var(--accent-cyan); }

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

/* Auth Login Screen */
#auth-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at center, #0f172a 0%, #030712 100%);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(6, 182, 212, 0.2);
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
  justify-content: center;
}

.auth-title {
  text-align: center;
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.35rem;
}

.auth-subtitle {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Responsive Styles */
@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    height: 100vh;
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .topbar-stats {
    display: none;
  }
}