body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    margin: 20px;
}

.container {
    background: white;
    padding: 20px;
    max-width: 98%;
    margin: auto;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h2 {
    text-align: center;
    color: #333;
}

a {
    text-decoration: none;
    color: #007bff;
    margin-right: 10px;
}

input[type="text"] {
    width: 100%;
    padding: 10px;
    margin: 15px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

thead {
    background: blue;
    color: white;
}

th, td {
    padding: 8px;
    border: 1px solid #ddd;
    text-align: left;
}

tbody tr:nth-child(even) {
    background: #f9f9f9;
}

tbody tr:hover {
    background: #eee;
}

th {
    cursor: pointer;
    user-select: none;
}

th.asc::after {
    content: " 🔼";
}

th.desc::after {
    content: " 🔽";
}

#topBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 999;
  width: 50px;
  height: 50px;
  background-color: #007bff;
  border: none;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  transition: background-color 0.3s ease;
}

#topBtn:hover {
  background-color: blue;
}

#topBtn svg {
  pointer-events: none;
}