:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(59, 130, 246, 0.5);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  --accent-whatsapp: #25d366;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-glow-blue: 0 0 25px rgba(59, 130, 246, 0.2);
  --shadow-glow-amber: 0 0 25px rgba(245, 158, 11, 0.25);
  --shadow-glow-red: 0 0 25px rgba(239, 68, 68, 0.25);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Background Ambient Glows */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
}

.bg-glow-1 {
  width: 600px;
  height: 600px;
  background: var(--accent-blue);
  top: -100px;
  right: -100px;
}

.bg-glow-2 {
  width: 500px;
  height: 500px;
  background: var(--accent-purple);
  bottom: -100px;
  left: -100px;
}

.app-container {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-subtle);
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, #93c5fd 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 8px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
  border-radius: 6px;
  font-weight: 600;
}

.header-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.ws-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  font-size: 0.8rem;
  color: #6ee7b7;
  font-weight: 500;
}

.ws-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.pulse-indicator.live {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse-ring 2s infinite ease-in-out;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 10px;
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-whatsapp {
  background: rgba(37, 211, 102, 0.15);
  border-color: rgba(37, 211, 102, 0.3);
  color: #4ade80;
}

.btn-whatsapp:hover {
  background: rgba(37, 211, 102, 0.25);
  box-shadow: 0 0 15px rgba(37, 211, 102, 0.2);
}

/* KPI Summary Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.15);
}

.kpi-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.bg-blue-subtle { background: rgba(59, 130, 246, 0.15); }
.bg-green-subtle { background: rgba(16, 185, 129, 0.15); }
.bg-amber-subtle { background: rgba(245, 158, 11, 0.15); }
.bg-red-subtle { background: rgba(239, 68, 68, 0.15); }
.bg-purple-subtle { background: rgba(139, 92, 246, 0.15); }

.kpi-value {
  font-size: 1.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  line-height: 1.1;
}

.kpi-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.color-green { color: #34d399; }
.color-amber { color: #fbbf24; }
.color-red { color: #f87171; }
.color-purple { color: #c084fc; }

/* Toolbar */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 18px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 24px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 12px;
  flex: 1;
  min-width: 280px;
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.85rem;
  width: 100%;
  outline: none;
}

.search-box input::placeholder {
  color: var(--text-dim);
}

.filter-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.filter-tab.active {
  background: rgba(59, 130, 246, 0.15);
  color: #93c5fd;
  border-color: rgba(59, 130, 246, 0.3);
}

.last-sync-tag {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* Nodes Grid */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

/* Node Card */
.node-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.node-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-card-hover);
}

.node-card.state-optimal {
  border-left: 4px solid var(--accent-green);
}

.node-card.state-failover {
  border-left: 4px solid var(--accent-amber);
  box-shadow: var(--shadow-glow-amber);
}

.node-card.state-down {
  border-left: 4px solid var(--accent-red);
  box-shadow: var(--shadow-glow-red);
}

.node-card.state-disabled {
  border-left: 4px solid var(--text-dim);
  opacity: 0.6;
}

/* Card Header */
.node-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.node-title-group h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.node-ip-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #93c5fd;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 2px;
}

.node-badges-group {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.badge-status {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 6px;
  letter-spacing: 0.04em;
}

.badge-status.optimal {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-status.failover {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
  animation: pulse-ring 2s infinite ease-in-out;
}

.badge-status.down {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.badge-status.disabled {
  background: rgba(107, 114, 128, 0.2);
  color: #9ca3af;
  border: 1px solid rgba(107, 114, 128, 0.4);
}

.latency-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Failover info bar */
.failover-info-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.25);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.failover-mode {
  font-weight: 600;
  color: #cbd5e1;
}

/* WAN List in Card */
.wan-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.wan-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  transition: background 0.2s ease;
}

.wan-item:hover {
  background: rgba(0, 0, 0, 0.35);
}

.wan-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wan-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.wan-dot.up {
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.wan-dot.down {
  background: var(--accent-red);
  box-shadow: 0 0 8px var(--accent-red);
}

.wan-dot.unknown {
  background: var(--accent-amber);
}

.wan-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #f1f5f9;
}

.wan-role {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: capitalize;
}

.wan-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.wan-iface-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}

.wan-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.wan-pill.up {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.wan-pill.down {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
}

/* Card Footer */
.node-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  padding: 20px;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  width: 100%;
  max-width: 720px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  transform: scale(0.95);
  transition: transform 0.2s ease;
}

.modal-card.modal-sm {
  max-width: 480px;
}

.modal-overlay.open .modal-card {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.btn-close:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
}

.modal-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-main);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 4px;
  display: block;
}

/* Event Items */
.events-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.event-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px;
}

.event-row.critical { border-left: 3px solid var(--accent-red); }
.event-row.warning { border-left: 3px solid var(--accent-amber); }
.event-row.success { border-left: 3px solid var(--accent-green); }

.event-icon { font-size: 1.2rem; }

.event-info { flex: 1; }

.event-header-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.event-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.event-time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Test Result Alert */
.test-result-box {
  padding: 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  margin-top: 12px;
}

.test-result-box.success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

.test-result-box.error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.hidden { display: none; }

/* Loading State & Spinner */
.loading-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  color: var(--text-muted);
  gap: 16px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

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

/* Toast Container */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px 18px;
  border-radius: 10px;
  color: #ffffff;
  font-size: 0.85rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toast-in 0.3s ease;
}

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

.main-footer {
  margin-top: 40px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding: 20px 0;
  border-top: 1px solid var(--border-color);
}