:root {
  --primary-color: #1A73E8;
  --secondary-color: #34A853;
  --alert-color: #EA4335;
  --warning-color: #F9AB00;
  --background-color: #F9FAFB;
  --surface-color: #FFFFFF;
  --text-color: #212121;
}

body {
  background-color: var(--background-color);
  color: var(--text-color);
  font-family: 'Inter', 'Roboto', 'Open Sans', sans-serif;
}

.navbar {
    border-bottom: 1px solid #dee2e6;
    background-color: var(--surface-color);
}

.gauge-card {
  background-color: var(--surface-color);
  border: none;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  transition: all 0.3s ease-in-out;
}

.gauge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

.gauge-container {
    position: relative;
    margin: 1rem auto;
    width: 90%;
    padding-top: 90%; /* 1:1 Aspect Ratio */
}

.gauge-canvas {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.gauge-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-color);
}

.card-footer {
    background-color: transparent;
    border-top: 1px solid #efefef;
    font-weight: 500;
}