body {
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  padding: 30px;
}

.container {
  max-width: 720px;
  margin: auto;
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

h1 { margin-bottom: 4px; }
.subtitle { color: #555; margin-top: 0; }

.trip {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

button {
  padding: 8px 12px;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid #d0d7e2;
  background: #eef2ff;
}

.results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}

.card {
  padding: 16px;
  border-radius: 10px;
  background: #eef2ff;
}

.green { background: #e7f7ed; }
.red { background: #fdeaea; }

@media (max-width: 600px) {
  .results { grid-template-columns: 1fr; }
}