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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #f0f4f0;
  color: #1a1a1a;
  min-height: 100vh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px 16px;
}

header {
  text-align: center;
  margin-bottom: 32px;
}

header h1 {
  font-size: 2rem;
  color: #2d5016;
}

.subtitle {
  color: #666;
  margin-top: 4px;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card h2 {
  font-size: 1rem;
  color: #555;
  margin-bottom: 16px;
}

.large-readout {
  text-align: center;
  padding: 40px 24px;
}

.large-readout .label {
  font-size: 0.9rem;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.large-readout .value {
  font-size: 4rem;
  font-weight: 700;
  color: #2d5016;
  margin: 8px 0;
}

.large-readout .sub {
  font-size: 0.85rem;
  color: #999;
}

.chart-container {
  position: relative;
  height: 300px;
}

.error-card {
  background: #fff0f0;
  border: 1px solid #ffcccc;
}

.error-text {
  color: #cc0000;
  text-align: center;
}

footer {
  text-align: center;
  margin-top: 40px;
  color: #aaa;
  font-size: 0.8rem;
}