slides: properly align columns

slides/sections/1.md

@@ -59,7 +59,7 @@ utilized as an approximation of the former.
 :::
 ::::
 
-\vspace{10pt}
+\vspace{1em}
 
 :::: {.columns}
 :::  {.column width=50%}

slides/sections/2.md

@@ -3,19 +3,12 @@
 
 ## Landau PDF
 
-:::: {.columns}
-:::  {.column width=50% align=center}
+:::: {.columns align=center}
+:::  {.column width=50%}
   $$
     L(x) = \frac{1}{\pi} \int \limits_{0}^{+ \infty}
            dt \, e^{-t \ln(t) -xt} \sin (\pi t)
   $$
-
-  . . .
-
-  \vspace{30pt}
-
-  \centering
-  No closed form for \textcolor{cyclamen}{ANYTHING}
 :::
 
 :::  {.column width=50%}
@@ -23,6 +16,12 @@
 :::
 ::::
 
+  . . .
+
+\begin{center}
+  No closed form for \textcolor{cyclamen}{ANYTHING}
+\end{center}
+
 
 ## Landau median
 

slides/sections/4.md

@@ -18,8 +18,8 @@ How to estimate sample median, mode and FWHM?
 
 ## Sample median
 
-:::: {.columns}
-:::  {.column width=50% .c}
+:::: {.columns align=bottom}
+:::  {.column width=50%}
   $$
     F(m) = \frac{1}{2}
   $$