* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #0b0b0b;
  color: #ffffff;
  font-family: Arial, sans-serif;
}

header {
  text-align: center;
  padding: 30px 20px;
  border-bottom: 1px solid #222;
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

header p {
  color: #aaa;
}

main {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

.card {
  background: #111;
  padding: 20px;
  border-radius: 14px;
  margin-bottom: 20px;
  border: 1px solid #1f1f1f;
}

.card h2 {
  margin-top: 0;
  font-size: 1.1rem;
  margin-bottom: 15px;
}

.odd {
  display: flex;
  justify-content: space-between;
  padding: 10px;
  border-radius: 8px;
  background: #0f0f0f;
  margin-bottom: 8px;
}

.price {
  color: #4caf50;
  font-weight: bold;
}

small {
  color: #777;
}

.loading {
  text-align: center;
  color: #777;
}

footer {
  text-align: center;
  padding: 20px;
  color: #555;
  border-top: 1px solid #222;
}