/* ============================
   CSS DESIGN SYSTEM
   IoT Smart Energy Meter Dashboard
   ============================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Background */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(24, 34, 56, 0.85);

  /* Accent Colors */
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-orange: #f97316;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;

  /* Gradients */
  --gradient-blue: linear-gradient(135deg, #3b82f6, #06b6d4);
  --gradient-green: linear-gradient(135deg, #10b981, #06b6d4);
  --gradient-orange: linear-gradient(135deg, #f97316, #f59e0b);
  --gradient-red: linear-gradient(135deg, #ef4444, #f97316);
  --gradient-purple: linear-gradient(135deg, #8b5cf6, #ec4899);
  --gradient-volt: linear-gradient(135deg, #f59e0b, #f97316);
  --gradient-current: linear-gradient(135deg, #06b6d4, #3b82f6);
  --gradient-power: linear-gradient(135deg, #ef4444, #ec4899);
  --gradient-energy: linear-gradient(135deg, #10b981, #34d399);
  --gradient-freq: linear-gradient(135deg, #8b5cf6, #6366f1);
  --gradient-pf: linear-gradient(135deg, #06b6d4, #10b981);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Borders */
  --border-color: rgba(148, 163, 184, 0.1);
  --border-glow: rgba(59, 130, 246, 0.3);

  /* Glass */
  --glass-bg: rgba(17, 24, 39, 0.6);
  --glass-border: rgba(148, 163, 184, 0.08);
  --glass-blur: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow-blue: 0 0 30px rgba(59, 130, 246, 0.15);
  --shadow-glow-cyan: 0 0 30px rgba(6, 182, 212, 0.15);
  --shadow-glow-green: 0 0 30px rgba(16, 185, 129, 0.15);

  /* Sizing */
  --header-height: 72px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ---------- Animated Background ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  z-index: 0;
  pointer-events: none;
  animation: glowFloat 12s ease-in-out infinite;
}

.bg-glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.bg-glow-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent 70%);
  bottom: 20%;
  left: -80px;
  animation-delay: -4s;
}

.bg-glow-3 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1), transparent 70%);
  top: 50%;
  right: 10%;
  animation-delay: -8s;
}

@keyframes glowFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

/* ---------- Header ---------- */
#main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: var(--header-height);
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

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

.logo-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--gradient-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.3); }
  50% { box-shadow: 0 0 30px rgba(59, 130, 246, 0.5); }
}

.header-text h1 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-text .subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-green);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: statusBlink 2s ease-in-out infinite;
}

@keyframes statusBlink {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--accent-green); }
  50% { opacity: 0.4; box-shadow: none; }
}

.header-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
}

/* ---------- Main Dashboard ---------- */
#dashboard {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* ---------- Sections ---------- */
.section {
  animation: fadeSlideUp 0.6s ease forwards;
  opacity: 0;
}

.section:nth-child(1) { animation-delay: 0.1s; }
.section:nth-child(2) { animation-delay: 0.2s; }
.section:nth-child(3) { animation-delay: 0.3s; }
.section:nth-child(4) { animation-delay: 0.4s; }
.section:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-header h2 i {
  color: var(--accent-blue);
  font-size: 1rem;
}

.update-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  padding: 4px 12px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
}

.dual-section {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 24px;
}

/* ---------- Panel (Glass Card) ---------- */
.panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 24px;
  transition: var(--transition-smooth);
}

.panel:hover {
  border-color: rgba(59, 130, 246, 0.15);
  box-shadow: var(--shadow-glow-blue);
}

/* ---------- Reading Cards Grid ---------- */
.readings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.reading-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-smooth);
  cursor: default;
}

.reading-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-glow {
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.reading-card:hover .card-glow {
  opacity: 1;
}

#voltageCard .card-glow { background: radial-gradient(circle, rgba(245, 158, 11, 0.08), transparent 70%); }
#voltageCard:hover { border-color: rgba(245, 158, 11, 0.25); }

#currentCard .card-glow { background: radial-gradient(circle, rgba(6, 182, 212, 0.08), transparent 70%); }
#currentCard:hover { border-color: rgba(6, 182, 212, 0.25); }

#powerCard .card-glow { background: radial-gradient(circle, rgba(239, 68, 68, 0.08), transparent 70%); }
#powerCard:hover { border-color: rgba(239, 68, 68, 0.25); }

#energyCard .card-glow { background: radial-gradient(circle, rgba(16, 185, 129, 0.08), transparent 70%); }
#energyCard:hover { border-color: rgba(16, 185, 129, 0.25); }

#frequencyCard .card-glow { background: radial-gradient(circle, rgba(139, 92, 246, 0.08), transparent 70%); }
#frequencyCard:hover { border-color: rgba(139, 92, 246, 0.25); }

#pfCard .card-glow { background: radial-gradient(circle, rgba(6, 182, 212, 0.08), transparent 70%); }
#pfCard:hover { border-color: rgba(6, 182, 212, 0.25); }

.reading-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.voltage-icon { background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(249, 115, 22, 0.15)); color: var(--accent-yellow); }
.current-icon { background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(59, 130, 246, 0.15)); color: var(--accent-cyan); }
.power-icon { background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(236, 72, 153, 0.15)); color: var(--accent-red); }
.energy-icon { background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(52, 211, 153, 0.15)); color: var(--accent-green); }
.frequency-icon { background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(99, 102, 241, 0.15)); color: var(--accent-purple); }
.pf-icon { background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(16, 185, 129, 0.15)); color: var(--accent-cyan); }

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

.reading-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.reading-value-row {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 4px 0;
}

.reading-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  transition: var(--transition-normal);
}

.reading-unit {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.reading-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  margin: 6px 0 4px;
  overflow: hidden;
}

.reading-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.voltage-bar { background: var(--gradient-volt); }
.current-bar { background: var(--gradient-current); }
.power-bar { background: var(--gradient-power); }
.energy-bar { background: var(--gradient-energy); }
.frequency-bar { background: var(--gradient-freq); }
.pf-bar { background: var(--gradient-pf); }

.reading-range {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ---------- Gauge Section ---------- */
.gauge-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 0;
}

.gauge-center-label {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.gauge-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.gauge-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.gauge-legend {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-item.safe .legend-dot { background: var(--accent-green); }
.legend-item.warning .legend-dot { background: var(--accent-yellow); }
.legend-item.danger .legend-dot { background: var(--accent-red); }

/* ---------- Charts ---------- */
.chart-panel {
  position: relative;
}

.chart-controls {
  display: flex;
  gap: 6px;
}

.chart-btn,
.history-btn {
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: 'Inter', sans-serif;
}

.chart-btn:hover,
.history-btn:hover {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.06);
}

.chart-btn.active,
.history-btn.active {
  color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.3);
}

.chart-wrapper {
  position: relative;
  height: 280px;
  margin-top: 12px;
}

.chart-wrapper canvas {
  width: 100% !important;
  height: 100% !important;
}

/* ---------- Bill Estimation ---------- */
.bill-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.bill-summary {
  text-align: center;
  padding: 24px 16px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(6, 182, 212, 0.08));
  border: 1px solid rgba(16, 185, 129, 0.12);
  border-radius: var(--radius-lg);
}

.bill-period {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.bill-period i {
  color: var(--accent-green);
}

.bill-amount-container {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 4px;
}

.bill-currency {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent-green);
  margin-top: 6px;
}

.bill-amount {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.8rem;
  font-weight: 800;
  background: var(--gradient-green);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bill-subtitle {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.bill-breakdown {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bill-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.bill-row span:last-child {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  color: var(--text-primary);
}

.bill-row-total span {
  font-weight: 600 !important;
  color: var(--accent-green) !important;
  font-size: 0.9rem;
}

.bill-divider {
  height: 1px;
  background: var(--border-color);
}

.bill-slab h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.slab-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 6px;
  transition: var(--transition-fast);
}

.slab-row.active-slab {
  background: rgba(16, 185, 129, 0.08);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.15);
}

/* ---------- Alerts ---------- */
.alerts-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 4px;
}

.alerts-list::-webkit-scrollbar {
  width: 4px;
}

.alerts-list::-webkit-scrollbar-track {
  background: transparent;
}

.alerts-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
}

.alert-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  border-radius: var(--radius-md);
  animation: alertSlideIn 0.4s ease;
  border: 1px solid transparent;
}

@keyframes alertSlideIn {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.alert-item.alert-danger {
  background: rgba(239, 68, 68, 0.06);
  border-color: rgba(239, 68, 68, 0.12);
}

.alert-item.alert-warning {
  background: rgba(245, 158, 11, 0.06);
  border-color: rgba(245, 158, 11, 0.12);
}

.alert-item.alert-info {
  background: rgba(59, 130, 246, 0.06);
  border-color: rgba(59, 130, 246, 0.12);
}

.alert-item.alert-success {
  background: rgba(16, 185, 129, 0.06);
  border-color: rgba(16, 185, 129, 0.12);
}

.alert-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.alert-danger .alert-icon { background: rgba(239, 68, 68, 0.12); color: var(--accent-red); }
.alert-warning .alert-icon { background: rgba(245, 158, 11, 0.12); color: var(--accent-yellow); }
.alert-info .alert-icon { background: rgba(59, 130, 246, 0.12); color: var(--accent-blue); }
.alert-success .alert-icon { background: rgba(16, 185, 129, 0.12); color: var(--accent-green); }

.alert-content {
  flex: 1;
}

.alert-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.alert-message {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.alert-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: 'JetBrains Mono', monospace;
}

.clear-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: 'Inter', sans-serif;
}

.clear-btn:hover {
  color: var(--accent-red);
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.06);
}

/* ---------- Relay Control ---------- */
.relay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.relay-visual {
  position: relative;
  margin: 8px 0;
}

.relay-ring {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: conic-gradient(
    var(--accent-green) 0deg,
    rgba(16, 185, 129, 0.3) 120deg,
    rgba(16, 185, 129, 0.05) 240deg,
    var(--accent-green) 360deg
  );
  animation: relayRingSpin 4s linear infinite;
  transition: var(--transition-smooth);
}

.relay-visual.relay-off .relay-ring {
  background: conic-gradient(
    var(--accent-red) 0deg,
    rgba(239, 68, 68, 0.3) 120deg,
    rgba(239, 68, 68, 0.05) 240deg,
    var(--accent-red) 360deg
  );
  animation: none;
}

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

.relay-inner {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--accent-green);
  transition: var(--transition-smooth);
}

.relay-visual.relay-off .relay-inner {
  color: var(--accent-red);
}

.relay-status {
  text-align: center;
}

.relay-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.relay-state {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-green);
  transition: var(--transition-normal);
}

.relay-state.off {
  color: var(--accent-red);
}

.relay-toggle-btn {
  width: 100%;
  padding: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  color: #fff;
  background: var(--gradient-red);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.relay-toggle-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}

.relay-toggle-btn:hover::before {
  opacity: 1;
}

.relay-toggle-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.3);
}

.relay-toggle-btn.turn-on {
  background: var(--gradient-green);
}

.relay-toggle-btn.turn-on:hover {
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

.relay-info {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
}

.relay-info-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.relay-info-row i {
  color: var(--accent-blue);
  width: 16px;
  text-align: center;
}

/* ---------- Threshold Settings ---------- */
.threshold-settings {
  width: 100%;
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
}

.threshold-settings h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.threshold-settings h4 i {
  color: var(--accent-blue);
}

.threshold-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.threshold-row label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.threshold-row input {
  width: 100px;
  padding: 6px 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  outline: none;
  text-align: right;
  transition: var(--transition-fast);
}

.threshold-row input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.save-threshold-btn {
  width: 100%;
  margin-top: 6px;
  padding: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.save-threshold-btn:hover {
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.4);
}

/* ---------- Energy Tips ---------- */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.tip-card {
  padding: 24px 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition-smooth);
}

.tip-card:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 185, 129, 0.2);
  box-shadow: var(--shadow-glow-green);
}

.tip-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(6, 182, 212, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--accent-green);
}

.tip-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.tip-card p {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ---------- Footer ---------- */
#main-footer {
  position: relative;
  z-index: 1;
  margin-top: 20px;
  padding: 20px 32px;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer-left i {
  color: var(--accent-blue);
}

.footer-center {
  text-align: center;
}

.footer-center span {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.footer-dept {
  font-size: 0.72rem !important;
  color: var(--text-muted) !important;
  font-weight: 400 !important;
}

.footer-right {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---------- Toast Notifications ---------- */
#toastContainer {
  position: fixed;
  top: 84px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  min-width: 320px;
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.4s ease;
}

.toast.toast-out {
  animation: toastOut 0.3s ease forwards;
}

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

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateX(100px);
  }
}

.toast-icon {
  font-size: 18px;
}

.toast.toast-danger .toast-icon { color: var(--accent-red); }
.toast.toast-warning .toast-icon { color: var(--accent-yellow); }
.toast.toast-info .toast-icon { color: var(--accent-blue); }
.toast.toast-success .toast-icon { color: var(--accent-green); }

.toast-text {
  flex: 1;
  font-size: 0.82rem;
  color: var(--text-primary);
  font-weight: 500;
}

.toast.toast-danger { border-color: rgba(239, 68, 68, 0.2); }
.toast.toast-warning { border-color: rgba(245, 158, 11, 0.2); }
.toast.toast-info { border-color: rgba(59, 130, 246, 0.2); }
.toast.toast-success { border-color: rgba(16, 185, 129, 0.2); }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .readings-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .dual-section {
    grid-template-columns: 1fr;
  }
  .tips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  #main-header {
    padding: 0 16px;
    height: auto;
    min-height: var(--header-height);
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .header-text h1 {
    font-size: 1.1rem;
  }

  #dashboard {
    padding: 20px 12px;
    gap: 20px;
  }

  .readings-grid {
    grid-template-columns: 1fr;
  }

  .tips-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .reading-value {
    font-size: 1.3rem;
  }

  .bill-amount {
    font-size: 2rem;
  }

  .gauge-value {
    font-size: 1.5rem;
  }
}