body { 
    font-family: sans-serif; 
    line-height: 1.6; 
    max-width: 800px; 
    margin: 40px auto; 
    padding: 0 20px; 
    background-image: linear-gradient(rgba(0,0,0,0.2), rgba(0,0,0,0.2)), url(背景退職.png);
}
h1 { border-bottom: 2px solid #333; }
table { width: 100%; border-collapse: collapse; margin: 20px 0; }
th, td { border: 1px solid #ccc; padding: 10px; text-align: left; }