body { font-family: Arial, sans-serif; margin: 0; background: #f7f9fb; }
header { background: #004d7a; color: white; padding: 1rem; text-align: center; }
#upload { background: #e8f1f8; text-align: center; padding: 1rem; margin: 1rem auto; border-radius: 10px; width: 85%; }
#upload .row { margin: 0.5rem 0; }
#upload input, #upload button { margin: 0.5rem; padding: 0.5rem; border-radius: 6px; border: 1px solid #ccc; }
#upload button { background: #004d7a; color: white; cursor: pointer; }
.message { color: #004d7a; font-weight: bold; }
#kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 20px 0;
}
.card {
  background: #f8f9fa;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  padding: 14px 16px;
  font-family: Arial, sans-serif;
  font-size: 14px;
  color: #1a1a1a;
  text-align: center;
  transition: transform 0.2s ease;
}
.card h2 { margin: 0; color: #004d7a; }
#ert { text-align: center; margin: 2rem; }
footer { text-align: center; padding: 1rem; color: #555; font-size: 0.9rem; }
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}