body { font-family: sans-serif; 
    line-height: 1.6; 
    background-image: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.3)), url(背景生意気就活生.png); 
    padding: 20px; }
.container { max-width: 800px; margin: auto; background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
h1 { color: #333; }
.highlight { color: #d9534f; font-weight: bold; }
button { background: #5cb85c; color: white; border: none; padding: 10px 20px; cursor: pointer; border-radius: 4px; }