body{background:#f5f5f5;margin-left:10%;margin-right:10%;font-family:Arial,sans-serif}.container{max-width:900px;margin:50px auto;padding:20px}h1{margin-bottom:10px}.subtitle{color:#666;margin-bottom:20px}textarea{box-sizing:border-box;resize:vertical;border:1px solid #ccc;border-radius:8px;width:100%;height:120px;padding:12px;font-size:16px}button{cursor:pointer;border:none;border-radius:8px;margin-top:10px;padding:10px 20px;font-size:16px}.loading{margin-top:20px}.answer{background:#fff;border-radius:8px;margin-top:30px;padding:20px}.answer p{white-space:pre-wrap;line-height:1.5}.sources{margin-top:20px}details{background:#fff;border-radius:8px;margin-bottom:10px;padding:10px}summary{cursor:pointer;font-weight:700}details p{white-space:pre-wrap;padding-left:1rem;line-height:1.5}a,a:visited{color:#007bff;text-decoration:none}a:hover,a:visited:hover{text-decoration:underline}footer{text-align:center;color:#666;margin-top:50px;padding-bottom:20px}input{box-sizing:border-box;border:1px solid #ccc;border-radius:8px;width:100%;margin-bottom:10px;padding:12px;font-size:16px}.warming-up{color:#666;margin-top:10px;font-style:italic}