/* Minimal styles */
.sb-table{ width:100%; border-collapse:collapse; }
.sb-table th, .sb-table td{ border:1px solid #ccc; padding:8px; }
.sb-btn{ padding:8px 12px; border:1px solid #111; background:#fff; cursor:pointer; }
.sb-reto{ border:1px solid #ddd; padding:12px; border-radius:8px; }
.sb-reto-timer{ font-weight:bold; margin-bottom:8px; }
.sb-rubrica ol{ padding-left:18px; }