% Inspired by https://www.reddit.com/r/LaTeX/comments/hov6pw/tikz_cover_page_code_and_link_1st_comment/

\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{ shapes.geometric }
\usetikzlibrary{calc}
\usepackage{anyfontsize}
\begin{document}
\pagestyle{empty}

\begin{tikzpicture}[remember picture,overlay]

%%%%%%%%%%%%%%%%%%%% Background %%%%%%%%%%%%%%%%%%%%%%%%

	\draw[top color=orange!60,bottom color=orange,draw=none] (current page.north west) -- (current
	page.north east) -- ($(current page.east)+(0,-7)$) -- cycle;

	\draw[fill=black!70,draw=none] (current page.south east) -- ($(current page.south
	west)+(0.25\paperwidth,0)$) -- ($(current page.east)+(0,-3)$) -- cycle;

	%%%%%%%%%%%%%%%%%%%%% Title of the Report %%%%%%%%%%%%%%%%%%%%
	%
	\node[right,black,minimum width=0.625*\paperwidth,minimum height=3cm, rounded corners] at
	($(current page.north west)+(0,-16)$) { {\fontsize{25}{30} \selectfont \bfseries TITLE OF THE
	REPORT} };
	%
	%%%%%%%%%%%%%%%%%%%%% Subtitle %%%%%%%%%%%%%%%%%%%%
	\node[right,black,minimum width=0.625*\paperwidth,minimum height=2cm, rounded corners] at
	($(current page.north west)+(0,-18)$) { {\huge \textit{Subtitle of the Report}} };
	%
	%%%%%%%%%%%%%%%%%%%%% Author Name %%%%%%%%%%%%%%%%%%%%
	%
	\node[right,black,minimum width=0.625*\paperwidth,minimum height=2cm, rounded corners] at
	($(current page.north west)+(0,-20)$) {

	{\Large \textsc{Author Name}} };

\end{tikzpicture}

\end{document}