body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 10px;
    background-color: #121212;
    color: #e0e0e0;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: #1e1e1e;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.letter {
    padding: 10px;
    min-height: 200px;
    font-family: 'Times New Roman', serif;
    line-height: 1.4;
    color: #e0e0e0;
    font-size: 14px;
}

.letter img {
    max-width: 80px;
    height: auto;
}