:root {
  --main-blue: #3b82f6;
  --bg-gray: #f3f4f6;
  --card-white: #ffffff;
  --text-dark: #1f2937;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-gray);
  font-family: sans-serif;
  color: var(--text-dark);
}

header {
  background-color: var(--main-blue);
  color: white;
  padding: 20px;
  text-align: center;
  font-weight: bold;
  font-size: 1.2rem;
}

main {
  padding: 15px;
}

.card {
  background: var(--card-white);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  margin-bottom: 15px;
}

h2 {
  margin-top: 0;
  font-size: 1rem;
  color: var(--main-blue);
}

.status-badge {
  display: inline-block;
  padding: 5px 10px;
  background: #dcfce7;
  color: #166534;
  border-radius: 20px;
  font-size: 0.8rem;
}