body {
    font-family: sans-serif;
    background: #f4f7f6;
    padding: 20px;
}
.container {
    max-width: 700px;
    margin: 0 auto;
}
h1 {
    text-align: center;
    color: #2c3e50;
}
.card {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}
.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-weight: bold;
    text-align: center;
}
.success {
    background: #d4edda;
    color: #155724;
}
.error {
    background: #f8d7da;
    color: #721c24;
}
.badge {
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 14px;
}
code {
    background: #eee;
    padding: 2px 6px;
    border-radius: 3px;
    word-break: break-all;
    font-size: 12px;
}
ul {
    list-style: none;
    padding: 0;
}
li {
    margin: 8px 0;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
}