:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #121824;
  --bg-card: rgba(18, 24, 36, 0.75);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.3);
  
  --text-primary: #f0f4f8;
  --text-secondary: #8a99ad;
  --text-muted: #536377;
  
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-green: #00e676;
  --accent-purple: #9d4edd;
  --accent-gold: #ffb703;
  --accent-red: #ff5252;
  
  --gradient-cyan: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --gradient-purple: linear-gradient(135deg, #7b2cbf 0%, #9d4edd 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  
  --font-main: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

* {
  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;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(0, 242, 254, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(157, 78, 221, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Glassmorphism utility */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

/* Overlay & Login Modal */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.overlay.active {
  opacity: 1;
  pointer-events: all;
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 2.5rem;
  text-align: center;
}

.brand-header .logo-badge {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.brand-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.input-group {
  text-align: left;
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.input-group input {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.input-group input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.25);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.primary-btn {
  width: 100%;
  background: var(--gradient-cyan);
  color: #040914;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.4);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.icon-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.icon-btn:hover {
  border-color: var(--accent-cyan);
}

.text-btn {
  background: transparent;
  color: var(--accent-cyan);
  padding: 0.4rem 0.8rem;
}

.text-btn:hover {
  text-decoration: underline;
}

.error-msg {
  color: var(--accent-red);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.hidden {
  display: none !important;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(10, 13, 20, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo {
  font-size: 1.6rem;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.subdomain-badge {
  background: rgba(0, 242, 254, 0.12);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  border: 1px solid rgba(0, 242, 254, 0.3);
}

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

.user-chip {
  background: rgba(255, 255, 255, 0.05);
  padding: 0.4rem 0.9rem;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Dashboard Layout */
.dashboard-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.metric-card {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.metric-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
}

.green-glow { box-shadow: 0 0 20px rgba(0, 230, 118, 0.2); border-color: rgba(0, 230, 118, 0.3); }
.blue-glow { box-shadow: 0 0 20px rgba(79, 172, 254, 0.2); border-color: rgba(79, 172, 254, 0.3); }
.purple-glow { box-shadow: 0 0 20px rgba(157, 78, 221, 0.2); border-color: rgba(157, 78, 221, 0.3); }
.gold-glow { box-shadow: 0 0 20px rgba(255, 183, 3, 0.2); border-color: rgba(255, 183, 3, 0.3); }

.metric-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.metric-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  margin: 0.2rem 0;
}

.metric-sub {
  font-size: 0.78rem;
  color: var(--accent-cyan);
}

.mono {
  font-family: var(--font-mono);
}

/* Sections */
.section-container {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.section-header h3 {
  font-size: 1.2rem;
  font-weight: 600;
}

.live-pulse-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--accent-green);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.live-pulse-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.4; }
  100% { transform: scale(0.95); opacity: 1; }
}

/* Nodes Cards Grid */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 1.5rem;
}

.node-card {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  position: relative;
  overflow: hidden;
}

.node-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.node-title-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.node-id {
  font-size: 1.15rem;
  font-weight: 700;
}

.node-status-chip {
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-online {
  background: rgba(0, 230, 118, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(0, 230, 118, 0.4);
}

.status-offline {
  background: rgba(255, 82, 82, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(255, 82, 82, 0.4);
}

.node-info-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  font-size: 0.88rem;
}

.info-item {
  display: flex;
  flex-direction: column;
}

.info-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-bottom: 0.1rem;
}

.info-val {
  color: var(--text-primary);
  font-weight: 500;
}

.node-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.node-actions .btn {
  flex: 1;
  font-size: 0.85rem;
  padding: 0.6rem;
}

/* Data Table */
.table-wrapper {
  overflow-x: auto;
}

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

.data-table th {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  padding: 1rem 1.25rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 2.5rem !important;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.82rem;
  border-top: 1px solid var(--border-color);
  margin-top: 2rem;
}

/* Spinner */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0,0,0,0.2);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}