body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 2rem;
}
h1 {
    color: #333;
}
button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    margin-bottom: 1rem;
    cursor: pointer;
    margin-right: 0.5rem;
}
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    margin-top: 1.5rem;
}
th, td {
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
    text-align: left;
}
th {
    background: #f9f9f9;
}
tr:hover {
    background: #f1f7ff;
}
.status {
    background-color: #eef;
    border: 1px solid #ddf;
    border-radius: 4px;
    padding: 10px;
    margin-bottom: 15px;
    color: #333;
    font-size: 0.9rem;
}
.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 1rem;
}
.firmware-info {
    background-color: #f0fff0;
    border: 1px solid #d0e0d0;
    border-radius: 4px;
    padding: 10px;
    margin-bottom: 15px;
    display: none;
}
.card-operations {
    background-color: #fff8e0;
    border: 1px solid #e0d8c0;
    border-radius: 4px;
    padding: 15px;
    margin: 15px 0;
}
.card-type-info {
    margin-bottom: 10px;
    font-weight: bold;
}
.op-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}