.board_controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.size_toggle {
    display: flex;
    gap: 4px;
}

.board_btn {
    font-size: 13px;
    padding: 6px 14px;
    border: none;
    border-radius: 5px;
    background: #02acd7;
    color: #fff;
    cursor: url("../cursors/cur_link.cur"), pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.board_btn:hover {
    background: #3a8ea4;
    transform: scale(1.05);
}

.board_btn:active {
    transform: scale(0.97);
}

.board_btn.active {
    background: #FF4D9A;
}

.board_btn.active:hover {
    background: #d4407f;
}

.board_grid {
    display: grid;
    gap: 3px;
    max-width: 600px;
    margin: 0 auto;
}

.board_cell {
    aspect-ratio: 1;
    border: 2px solid #9dd6e6;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #9dd6e6;
    cursor: url("../cursors/cur_link.cur"), pointer;
    overflow: hidden;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    background: rgba(255, 255, 255, 0.5);
}

.board_cell:hover {
    border-color: #FF4D9A;
    background: rgba(255, 77, 154, 0.1);
}

.board_cell.filled {
    border: none;
    border-radius: 0;
}

.board_cell.dragging {
    opacity: 0.4;
}

.board_cell.drag_over {
    border: 2px solid #FF4D9A;
    background: rgba(255, 77, 154, 0.1);
}

.board_cell img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #02acd7;
    color: #fff;
    padding: 8px 20px;
    border-radius: 6px;
    font-size: 13px;
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 9999;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media only screen and (max-width: 600px) {
    .board_grid {
        max-width: 100%;
    }

    .board_btn {
        font-size: 11px;
        padding: 5px 10px;
    }
}