body{ font-family: Segoe UI, Arial, Helvetica, sans-serif; background:#fff; color:#111; }
.container{ padding:18px; width:380px }
header h1{ margin:6px 0 4px; font-size:18px }
.muted{ color:#666; font-size:12px; margin-bottom:12px }
.primary{ display:inline-block; background:#0078d4; color:#fff; padding:10px 14px; border-radius:6px; border:0; cursor:pointer; font-size:14px }
#status{ margin-top:12px; font-size:13px }
#status .ok{ color:green }
#status .err{ color:crimson }