:root {
    --grid-dim: 4; /* Default to 4x4 */
    --tile-size: 80px;
    --gap-size: 8px;
}

body {
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    font-family: "Comic Relief", system-ui;
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px 0;
}

.container {
    max-width: fit-content;
    width: 100%;
}

h1 {
    color: var(--bs-body-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    font-weight: 700;
    text-align: center;
}

.lead {
    color: var(--bs-body-color);
    opacity: 0.8;
    margin-bottom: 20px;
}

.info-box {
    background-color: var(--bs-tertiary-bg);
    border: 2px solid var(--bs-border-color);
    border-radius: 10px;
    padding: 10px 15px;
    min-width: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.info-label {
    font-size: 0.8rem;
    color: var(--bs-body-color);
    opacity: 0.7;
    text-transform: uppercase;
    font-weight: 600;
}

.info-value {
    font-size: 1.5rem;
    font-weight: bold;
}

.input-group .form-select {
    background-color: var(--bs-card-bg);
    color: var(--bs-body-color);
    border-color: var(--bs-border-color);
    max-width: 180px;
}

.input-group .input-group-text {
    background-color: var(--bs-tertiary-bg);
    color: var(--bs-body-color);
    border-color: var(--bs-border-color);
}

.btn {
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-info.text-white {
    color: #fff !important;
}

#game-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

#wrapper {
    display: grid;
    grid-template-columns: repeat(var(--grid-dim), var(--tile-size));
    grid-template-rows: repeat(var(--grid-dim), var(--tile-size));
    gap: var(--gap-size);
    background-color: var(--bs-secondary-bg);
    border-radius: 15px;
    padding: var(--gap-size);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    width: fit-content;
}

.tile {
    width: var(--tile-size);
    height: var(--tile-size);
    border: 2px solid var(--bs-border-color);
    border-radius: 8px;
    background-color: var(--bs-primary);
    color: white;
    font-size: calc(var(--tile-size) * 0.4); /* Responsive font size */
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    font-family: 'Courier New', monospace;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.tile:hover:not(.empty) {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.tile.empty {
    background-color: var(--bs-secondary-bg);
    border-color: var(--bs-border-color);
    cursor: default;
    box-shadow: none;
}

/* Modal Styling */
.modal-content {
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    border: 1px solid var(--bs-border-color);
    border-radius: 1rem;
}

.modal-header {
    border-bottom: 1px solid var(--bs-border-color);
}

.modal-footer {
    border-top: 1px solid var(--bs-border-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    :root {
        --tile-size: 60px;
        --gap-size: 6px;
    }
    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    :root {
        --tile-size: 50px;
        --gap-size: 5px;
    }
    .info-box {
        min-width: 90px;
        padding: 8px 10px;
    }
    .info-label {
        font-size: 0.7rem;
    }
    .info-value {
        font-size: 1.2rem;
    }
    .btn {
        padding: 8px 15px;
        font-size: 0.9rem;
        gap: 6px;
    }
}