body { font-family: Arial, sans-serif; margin: 0; padding: 20px; background: #f7f7f7; }
.container { max-width: 900px; margin: 0 auto; background: white; padding: 20px; border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.05);}
label { display:block; margin:10px 0 }
button { padding:8px 12px; }
.display-wrapper { padding: 6px; }
.tab