body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

h1, h2 {
    text-align: center;
}

.info-table, .file-list-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.info-table td, .file-list-table td, .file-list-table th {
    border: 1px solid #000;
    padding: 8px;
    text-align: center;
}

.file-list-table th {
    background-color: #f2f2f2;
}

.balls {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ball {
    width: 24px;  /* 80% of 30px */
    height: 24px; /* 80% of 30px */
    background-color: red;
    color: #fff;
    font-weight: bold;
    display: inline-block;
    border-radius: 50%;
    margin: 0 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 21px; /* 140% of 15px */
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}