* { box-sizing: border-box; }
body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f5f7;
    margin: 0;
    padding: 40px 20px;
    color: #1f2937;
}
.container {
    max-width: 640px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 8px;
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
h1 { font-size: 22px; margin-bottom: 4px; }
p { line-height: 1.5; }
.status {
    margin: 16px 0;
    padding: 12px 16px;
    border-radius: 6px;
    font-weight: bold;
}
.status-ok { background: #dcfce7; color: #166534; }
.status-fail { background: #fee2e2; color: #991b1b; }
.hint {
    background: #fef9c3;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 14px;
}
.hint ol { margin: 8px 0 0 20px; padding: 0; }
.note { font-size: 13px; color: #6b7280; }
code {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: Consolas, monospace;
}