* { box-sizing: border-box; }
body { margin: 0; font-family: 'Segoe UI', sans-serif; background: #f5f7fa; color: #333; }
.container {
    max-width: 900px; margin: 30px auto; background: white;
    padding: 30px; border-radius: 10px; box-shadow: 0 0 10px #ccc;
}
h2 { color: #007acc; margin-top: 0; }
input[type=text], input[type=password] {
    padding: 12px; width: 100%; margin-bottom: 15px;
    border: 1px solid #ccc; border-radius: 6px; font-size: 16px;
}
button {
    padding: 12px 20px; background: #007acc; color: white;
    border: none; border-radius: 6px; cursor: pointer; font-size: 16px;
}
button:hover { background: #005fa3; }
pre { white-space: pre-wrap; background: #f8f8f8; padding: 10px; border-radius: 5px; overflow: auto; }
table {
    width: 100%; border-collapse: collapse; margin-top: 20px;
}
th, td {
    padding: 12px; border-bottom: 1px solid #ddd; text-align: left;
}
th { background-color: #007acc; color: white; }
tr:hover { background-color: #f1f1f1; }
.logout {
    float: right; color: #007acc; text-decoration: underline;
}
@media (max-width: 600px) {
    .container { margin: 15px; padding: 20px; }
    button, input[type=text], input[type=password] { font-size: 14px; }
    iframe { height: 200px !important; }
}