Fine tuning vjust ggplot2 - r

Question

I am trying to make a plot similar to this one:
Right now, I am working on the IL-b1 plot (since it comes first in the dataset) and will apply the settings across all plots.
I am currently working on the x-axis labels, but am running into problems with vjust no matter how small I make it. Here is the image of my current code:
Any advice on how to make the labels closer to the x-axis? No matter how small i make vjust is doesn't get any closer...
Here is my current code:
il1b <- ggplot(data = mouse) +
geom_violin(aes(x = Treatment, y = `IL-1b_fold`)) +
geom_jitter(aes(x = Treatment, y = `IL-1b_fold`)) +
theme_classic() +
ggtitle(label = "IL-1\u03b2") +
ylab("fold mock control") +
theme(plot.title = element_text(face = "bold"),
axis.title.x = element_text(face = "bold", size = 12),
axis.title.y = element_text(face = "bold", size = 12),
axis.text.x = element_text(face = "bold", angle = 45, size = 11, color = "black", vjust = -0.00001),
axis.text.y = element_text(size = 11, color = "black"))
setwd(output)
ggsave("il1b.png", il1b, width = 5, height = 5, units = "in")
output is a stored file path to the output directory. This is all within an R Markdown code chunk.
Reprex of first 10 obs in dataset:
wrapr::build_frame(\n \"GBM#\" , \"Treatment\", \"IL-1b\", \"IL-6\" , \"TNF-a\", \"IP-10\" , \"IL-29\", \"IFN-a2\", \"IFN-b\", \"IL-10\", \"IFN-y\", \"IL-1b_fold\", \"IL-6_fold\", \"TNF-a_fold\", \"IP-10_fold\", \"IL-29_fold\", \"IFN-a2_fold\", \"IFN-b_fold\", \"IL-10_fold\", \"IFN-y_fold\" |\n 1 , \"Mock\" , 484.4 , \"2290.62\" , 2055 , 951.4 , 433.4 , 567.8 , 400.4 , 2595 , 60.64 , 1 , 1 , 1 , 1 , 1 , 1 , 1 , 1 , 1 |\n 1 , \"PVSRIPO\" , 383.6 , \"23233.55\", 1555 , 9865 , 298.8 , 546.6 , 240.9 , 4816 , 136.4 , 0.792 , 10.14 , 0.7564 , 10.37 , 0.6894 , 0.9628 , 0.6017 , 1.856 , 2.249 |\n 1 , \"Poly(I:C)\", 849.5 , \"37969.47\", 3451 , 1377 , 265 , 457.2 , 255.3 , 8435 , 53.69 , 1.754 , 16.58 , 1.679 , 1.448 , 0.6115 , 0.8052 , 0.6376 , 3.251 , 0.8854 |\n 1 , \"cGAMP\" , 472.2 , \"12495.37\", 4002 , 3.078e+04, 304.4 , 741.4 , 324.7 , 3411 , 42.48 , 0.9748 , 5.455 , 1.947 , 32.35 , 0.7024 , 1.306 , 0.8109 , 1.315 , 0.7005 |\n 2 , \"Mock\" , 23 , \"2851.31\" , 5.25 , 35.06 , 4.54 , 8.69 , 21.84 , 4.11 , 8.55 , 1 , 1 , 1 , 1 , 1 , 1 , 1 , 1 , 1 |\n 2 , \"PVSRIPO\" , 11.57 , \"142.84\" , 16.69 , 6116 , 13.57 , 23.46 , 21.84 , 5.63 , 5.14 , 0.503 , 0.0501 , 3.179 , 174.5 , 2.989 , 2.7 , 1 , 1.37 , 0.6012 |\n 2 , \"Poly(I:C)\", 28.41 , \"158.04\" , 38.85 , 822.7 , 7.18 , 3.11 , 6.61 , 5.48 , 4.47 , 1.235 , 0.05543 , 7.4 , 23.47 , 1.581 , 0.3579 , 0.3027 , 1.333 , 0.5228 |\n 2 , \"cGAMP\" , 71.07 , \"1166.8\" , 162.7 , 1794 , 8.08 , 7.72 , 22.55 , 25.62 , 9.94 , 3.09 , 0.4092 , 30.98 , 51.18 , 1.78 , 0.8884 , 1.033 , 6.234 , 1.163 |\n 4 , \"Mock\" , 8.67 , \"1148.81\" , 203.6 , 1.86 , 1.88 , 35.52 , 39.1 , 8.21 , 74.05 , 1 , 1 , 1 , 1 , 1 , 1 , 1 , 1 , 1 |\n 4 , \"PVSRIPO\" , 88.52 , \"1997.02\" , 551 , 211.4 , 1.88 , 35.52 , 39.1 , 4.71 , 74.05 , 10.21 , 1.738 , 2.706 , 113.6 , 1 , 1 , 1 , 0.5737 , 1 )\n

Answer 1

Thanks so much to #Daniel Molitor and #teunbrand! I had a general misunderstanding of how vjust functions. The following setting got the desired output: vjust = 0.65
Here is the code for the revised output, which is attached:
il1b <- ggplot(data = mouse) +
geom_violin(aes(x = Treatment, y = `IL-1b_fold`)) +
geom_jitter(aes(x = Treatment, y = `IL-1b_fold`)) +
theme_classic() +
ggtitle(label = "IL-1\u03b2") +
ylab("fold mock control") +
theme(plot.title = element_text(face = "bold"),
axis.title.x = element_text(face = "bold", size = 12),
axis.title.y = element_text(face = "bold", size = 12),
axis.text.x = element_text(face = "bold", angle = 45, size = 11, color = "black", vjust = 0.65),
axis.text.y = element_text(size = 11, color = "black"))
setwd(output)
ggsave("il1b.png", il1b, width = 5, height = 5, units = "in")
Revised output: