* { box-sizing: border-box; }
body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: #f4f5f7;
    color: #1c1e21;
    margin: 0;
    display: flex;
    justify-content: center;
    padding: 48px 16px;
}
.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .08);
    padding: 32px;
    max-width: 720px;
    width: 100%;
}
h1 { font-size: 22px; margin: 0 0 24px; }
h2 { font-size: 16px; margin: 0 0 12px; }
.login-options { display: flex; gap: 32px; flex-wrap: wrap; }
.login-option { flex: 1 1 260px; }
.qr-box svg { width: 220px; height: 220px; display: block; }
.hint { color: #606770; font-size: 13px; margin-top: 8px; }
.error { color: #c0392b; font-size: 14px; }
.status { font-size: 14px; margin-top: 12px; }
table { border-collapse: collapse; width: 100%; margin: 16px 0; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid #e4e6eb; font-size: 14px; }
th { color: #606770; font-weight: 600; }
.btn {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    border: 0;
    border-radius: 8px;
    padding: 10px 16px;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
}
.btn.secondary { background: #e4e6eb; color: #1c1e21; }
.btn.danger { background: #c0392b; }
.actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 16px; }
a { color: #2563eb; }
label { display: block; font-size: 13px; color: #606770; margin: 12px 0 4px; }
input[type=text], textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid #ccd0d5;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}
.secret-note { background: #f4f5f7; border-radius: 8px; padding: 12px 16px; margin: 16px 0; }
.secret-box { word-break: break-all; }