body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 20px;
    background-color: #f5f5f5;
}

h1 {
    text-align: center;
    color: #333;
}

.button-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    margin: 0 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

.blue-button {
    background-color: #007BFF;
    color: white;
}

.blue-button:hover {
    background-color: #0056b3;
}

.green-button {
    background-color: #28a745;
    color: white;
}

.green-button:hover {
    background-color: #218838;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
}

th, td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

th {
    background-color: #f8f9fa;
    font-weight: bold;
    color: #495057;
}

tr:nth-child(even) {
    background-color: #f2f2f2;
}

tr:hover {
    background-color: #e9ecef;
}

.positive {
    color: #28a745;
    font-weight: bold;
}

.negative {
    color: #dc3545;
    font-weight: bold;
}