body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #f7f7f9;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 600px;
  margin: 40px auto;
  background: white;
  padding: 24px;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

h1 {
  margin-top: 0;
}

.subtitle {
  color: #666;
  margin-bottom: 20px;
}

#expense-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.expense {
  padding: 12px;
  border-bottom: 1px solid #eee;
}

.expense:last-child {
  border-bottom: none;
}

.timestamp {
  font-size: 0.8rem;
  color: #999;
}