:root {
  --primary-color: #1DCD9F;
  --primary-dark: #169976;
  --dark-color: #000000;
  --dark-secondary: #222222;
  --light-color: #f8f9fa;
  --card-bg: #ffffff;
  --card-border: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #868e96;
  --chart-grid: #e9ecef;
  --border-radius: 0.5rem;
  --transition-speed: 0.3s;
  --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.05);
}

body {
  background-color: var(--light-color);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  padding: 0 15px;
}

h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1rem;
  font-weight: 600;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-speed);
}

a:hover {
  color: var(--primary-dark);
}

.navbar {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: background-color var(--transition-speed);
}

.navbar-brand {
  font-weight: 700;
}

.navbar-brand strong {
  color: var(--primary-color);
}

.nav-link {
  font-weight: 500;
  padding: 0.5rem 1rem;
}

.nav-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

.dashboard-header {
  margin-bottom: 2rem;
}

.dashboard-title {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.sensor-status {
  font-size: 0.9rem;
}

.card {
  border-radius: var(--border-radius);
  border: 1px solid var(--card-border);
  box-shadow: var(--box-shadow);
  margin-bottom: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
  background-color: var(--card-bg);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.08);
}

.card-header {
  font-weight: 600;
  border-bottom: 1px solid var(--card-border);
  background-color: rgba(0, 0, 0, 0.01);
  border-top-left-radius: var(--border-radius);
  border-top-right-radius: var(--border-radius);
}

.metric-card .card-body {
  padding: 1.5rem;
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.progress {
  height: 0.5rem;
  margin-top: 0.5rem;
  border-radius: 1rem;
  background-color: rgba(0, 0, 0, 0.05);
}

.progress-bar {
  border-radius: 1rem;
}

.chart-container {
  position: relative;
  height: 300px;
  margin-bottom: 1.5rem;
}

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

.footer {
  margin-top: auto;
  padding: 1.5rem 0;
  background-color: var(--dark-color);
  color: white;
  border-top: 1px solid var(--dark-secondary);
  transition: background-color var(--transition-speed);
}

.footer p {
  color: #ffffff;
}

@media (max-width: 768px) {
  .metric-value {
    font-size: 1.5rem;
  }
  
  .chart-container {
    height: 250px;
  }
}

.fw-medium {
  font-weight: 500;
}

.refresh-btn {
  cursor: pointer;
  transition: transform 0.2s;
}

.refresh-btn:hover {
  transform: rotate(90deg);
}

.notification-toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  min-width: 300px;
  z-index: 9999;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.fresh-data {
  animation: pulse 1.5s ease-in-out;
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-outline-primary {
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-outline-primary:hover, .btn-outline-primary:focus {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.bg-primary {
  background-color: var(--primary-color) !important;
}

.bg-success {
  background-color: var(--primary-color) !important;
}

.text-primary {
  color: var(--primary-color) !important;
}

.badge.bg-success {
  background-color: var(--primary-color) !important;
}

.badge.bg-danger {
  background-color: #dc3545 !important;
}

.badge.bg-warning {
  background-color: #ffc107 !important;
}