body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  margin: 0;
  padding: 0;
  background-color: #fafafa;
  color: #333;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: #2c3e50;
  color: #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
}

header h1 a {
  color: #fff;
  text-decoration: none;
}

nav a {
  margin-left: 1rem;
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease-in-out;
}

nav a:hover {
  color: #1abc9c;
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
}

th,
td {
  border: 1px solid #ccc;
  padding: 0.5rem;
  text-align: left;
}

th {
  background-color: #f2f2f2;
}

main {
  padding: 2rem;
}

.footer {
  border-top: 1px solid #ddd;
  font-size: 0.9rem;
  text-align: center;
  padding: 1rem 0;
  color: #777;
}

/* Dev mode: red header */
header.dev {
  background-color: #FFCC00 !important;
  /* Red for localhost */
}

.card-title {
  font-weight: 600;
  text-align: center;
}

.card .btn {
  width: 100%;
}

.card:hover {
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
  transition: 0.2s ease;
}

a.text-decoration-none:hover {
  text-decoration: none;
}

.text-danger {
  font-weight: bold;
}