.mode-selector { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.mode-selector .btn { min-height: 3rem; display: grid; place-items: center; }
.runtime-inputs { max-width: 30rem; }
.quick-runtime .btn { min-height: 2.75rem; }
.result-day { font-size: 1.1rem; font-weight: 600; }
#extra-time summary { cursor: pointer; }
[hidden] { display: none !important; }
@media (max-width: 575.98px) {
  .mode-selector { grid-template-columns: 1fr; }
  .calculator-card .card-body { padding: 1.25rem !important; }
}