body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333333;
}

h2 {
    text-align: center;
    margin-top: 20px;
    font-size: 2rem;
    color: #444444;
}

table {
    width: 80%;
    margin: 30px auto;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    background-color: white;
}

th,
td {
    padding: 15px;
    text-align: left;
    font-size: 1rem;
    border: 1px solid #dddddd;
}

th {
    background-color: #4CAF50;
    color: white;
    font-size: 1.1rem;
}

td {
    background-color: #f9f9f9;
}

td:first-child {
    font-weight: bold;
}

tr:hover {
    background-color: #f1f1f1;
    cursor: pointer;
}

tr.details:hover {
    background-color: #f9f9f9;
}

.details {
    display: none;
    background-color: #f9f9f9;
    font-style: italic;
    color: #555555;
}

.details td {
    padding-left: 40px;
    background-color: #fafafa;
}

.expand-icon {
    margin-left: 10px;
    font-size: 16px;
    color: #4CAF50;
}

.expand-icon.open {
    transform: rotate(90deg);
    transition: transform 0.3s ease;
}

.expand-btn {
    border: none;
    background-color: #4CAF50;
    color: white;
    padding: 8px 16px;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
}

.expand-btn:hover {
    background-color: #45a049;
}

.expand-btn:focus {
    outline: none;
}

@media (max-width: 768px) {
    table {
        width: 100%;
    }
}