.user-auth, .user-logs, .user-index, .site-index {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    background-color: #f8f9fa;
}

.user-auth h1, .user-logs h1, .user-index h1, .site-index h1 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.btn-primary, .btn-danger, .btn-info {
    width: 100%;
    margin-top: 0.5rem;
}

.alert {
    margin-bottom: 1.5rem;
}

.table {
    margin-top: 1.5rem;
}

.table th, .table td {
    vertical-align: middle;
}

.table pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
}