/* ==========================================================================
   Home Sync - Modern Dark Theme & Glassmorphism Design System
   ========================================================================== */

:root {
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Color Palette */
  --bg-base: #07090e;
  --bg-gradient: radial-gradient(circle at 50% 0%, #151c2e 0%, #07090e 75%);
  --bg-card: rgba(17, 24, 39, 0.72);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-card-active: rgba(30, 41, 59, 0.95);
  --bg-input: rgba(15, 23, 42, 0.8);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(6, 182, 212, 0.5);
  
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  
  --color-primary: #06B6D4;
  --color-primary-glow: rgba(6, 182, 212, 0.35);
  --color-temp: #F43F5E;
  --color-temp-glow: rgba(244, 63, 94, 0.3);
  --color-humidity: #38BDF8;
  --color-humidity-glow: rgba(56, 189, 248, 0.3);
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --shadow-glow: 0 0 20px -2px var(--color-primary-glow);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-family);
  background: var(--bg-base);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* Header */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #06B6D4 0%, #3B82F6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

.brand-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: #ffffff;
  stroke-width: 2;
}

.brand-title h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #FFFFFF, #94A3B8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

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

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34D399;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 10px #10B981;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.user-profile-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 4px 10px 4px 4px;
  font-size: 0.82rem;
  color: var(--text-main);
  backdrop-filter: blur(8px);
}

.user-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.user-avatar-placeholder {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, #06B6D4, #8B5CF6);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-name {
  font-weight: 500;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-logout {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  border-radius: 50%;
  color: var(--text-muted);
  transition: var(--transition);
  margin-left: 2px;
}

.btn-logout:hover {
  color: #FB7185;
  background: rgba(251, 113, 133, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, #06B6D4 0%, #2563EB 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-subtle);
  color: var(--text-main);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}

.btn.loading svg {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Control Bar */
.control-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 24px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.control-group-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  font-weight: 700;
  margin-bottom: 8px;
}

.interval-selector {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  padding: 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  width: fit-content;
}

.interval-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

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

.interval-btn.active {
  background: #0284C7;
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.4);
}

/* Sensor Filter Chips */
.sensor-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.sensor-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

.sensor-chip:hover {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-main);
}

.sensor-chip.active {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--chip-color, var(--color-primary));
  color: #FFFFFF;
  box-shadow: 0 0 12px -2px var(--chip-glow, var(--color-primary-glow));
}

.chip-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--chip-color, #94A3B8);
  transition: var(--transition);
}

.sensor-chip:not(.active) .chip-indicator {
  opacity: 0.4;
}

.chip-quick-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  opacity: 0.8;
  transition: var(--transition);
}

.btn-link:hover {
  opacity: 1;
}

/* Sensor Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.sensor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.sensor-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-accent, var(--color-primary));
  opacity: 0.8;
}

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

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.card-subtitle {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.battery-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.battery-badge.low {
  color: var(--color-danger);
  background: rgba(239, 68, 68, 0.15);
}

.card-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  background: var(--bg-input);
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

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

.metric-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 4px;
}

.metric-val-wrapper {
  display: flex;
  align-items: baseline;
  gap: 2px;
  margin-top: 2px;
}

.metric-val {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.metric-val.temp {
  color: #FB7185;
}

.metric-val.humidity {
  color: #38BDF8;
}

.metric-unit {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.metric-range {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.card-footer {
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}

/* Visualizations Section */
.charts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

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

.chart-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chart-icon-badge {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chart-icon-badge.temp {
  background: rgba(244, 63, 94, 0.15);
  color: #F43F5E;
}

.chart-icon-badge.humidity {
  background: rgba(56, 189, 248, 0.15);
  color: #38BDF8;
}

.chart-title-group h2 {
  font-size: 1.15rem;
  font-weight: 700;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.chart-canvas-container {
  position: relative;
  width: 100%;
  height: 340px;
}

/* Statistics Table Card */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

.table-header {
  margin-bottom: 16px;
}

.table-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.stats-table th {
  padding: 12px 14px;
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-subtle);
}

.stats-table td {
  padding: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-main);
}

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

.table-sensor-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

/* Loading Skeleton */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(7, 9, 14, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

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

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(6, 182, 212, 0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 16px 12px 40px;
  }
  
  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
  
  .interval-selector {
    width: 100%;
    justify-content: space-between;
  }
  
  .interval-btn {
    padding: 6px 8px;
    font-size: 0.78rem;
  }
  
  .chart-canvas-container {
    height: 260px;
  }
}