body {
  font-family: Arial, sans-serif;
  background: #f6f8fa;
  color: #333;
  margin: 0;
  padding: 0;
}
header {
  background: #1e293b;
  color: white;
  padding: 1rem;
  text-align: center;
}
.compare-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}
.selectors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
.selectors select {
  margin: 0.3rem;
  padding: 0.4rem;
  border-radius: 6px;
  border: 1px solid #ccc;
}
button {
  background: #2563eb;
  color: white;
  padding: 0.6rem 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
button:hover { background: #1d4ed8; }
table {
  width: 90%;
  margin: 2rem auto;
  border-collapse: collapse;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
th, td {
  border: 1px solid #ddd;
  padding: 0.8rem;
  text-align: left;
}
th {
  background: #2563eb;
  color: white;
}
.info {
  text-align: center;
  margin-top: 2rem;
}
footer {
  text-align: center;
  padding: 1rem;
  margin-top: 3rem;
  color: #555;
}
.admin-link {
  color: #fff;
  font-size: 0.9rem;
  position: absolute;
  right: 1rem;
  top: 1rem;
  text-decoration: none;
}
.admin-link:hover {
  text-decoration: underline;
}
.back-link { margin-left: 5%; }