body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 1rem 0; /* Ajoute un peu d'espace en haut et en bas sur mobile */
    font-family: sans-serif;
    background-color: #f8f9fa;
}

#config-container, #game-container {
    width: 90%;
    max-width: 600px;
    text-align: center;
}

#game-grid {
    display: inline-grid;
    grid-template-columns: repeat(9, 45px);
    gap: 3px;
    background-color: #343a40;
    padding: 3px;
    border-radius: 8px;
}

.grid-cell {
    width: 45px;
    height: 45px;
    background-color: #fff;
    border: 1px solid #ccc;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    position: relative;
    transition: all 0.2s ease-in-out;
}

.grid-cell:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
    z-index: 10;
}

.grid-cell.selected {
    border-color: #0d6efd;
    transform: scale(1.1);
}

.played-correct-1 { border-bottom: 5px solid #D32F2F; }
.played-correct-2 { border-bottom: 5px solid #1976D2; }
.played-correct-3 { border-bottom: 5px solid #388E3C; }
.played-correct-4 { border-bottom: 5px solid #7B1FA2; }
.played-correct-5 { border-bottom: 5px solid #F57C00; }
.played-correct-6 { border-bottom: 5px solid #0097A7; }
.played-correct-7 { border-bottom: 5px solid #C2185B; }
.played-correct-8 { border-bottom: 5px solid #6D4C41; }
.played-correct-9 { border-bottom: 5px solid #455A64; }

.grid-cell.played-error::after {
    content: '';
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    background-color: #dc3545;
    border-radius: 50%;
    border: 1px solid white;
}

#base-counters {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.base-counter {
    border: 2px solid #ccc;
    padding: 5px 10px;
    border-radius: 8px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    background-color: #e9ecef;
    transition: all 0.2s ease-in-out;
}

.base-counter:hover {
    border-color: #0d6efd;
    color: #0d6efd;
}