@media only screen and (max-width:1400px), only screen and (max-device-width: 840px) {
    #setup-options {
        height: 400px;
        left: 630px;
        position: absolute;
        top: 550px;
        width: 160px;
    }
    #game-response {
        border: none;
        color: black;
        font-size: 12px;
        height: 150px;
        left: 25px;
        position: absolute;
        text-align: center;
        top: 600px;
        width: 500px;
    }
    #production-code {
        color: black;
        font-size: 10px;
        height: 20px;
        left: 100px;
        position: absolute;
        text-align: right;
        top: 800px;
        width: 600px;
    }
  }

  .calc-col-digits {
  display: flex;
  align-items: stretch;
}

/* Grille des chiffres : 3 colonnes, lignes fixes */
.calc-digit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 48px;   /* hauteur identique pour TOUTES les touches */
  gap: 8px;
  width: 100%;
}

/* Chaque touche occupe 100% de sa cellule, sans marges parasites */
.calc-digit-grid .calc-btn {
  margin: 0;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}