Greeting Card

\documentclass[11pt,a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[a4paper,margin=0.5cm]{geometry}
\usepackage{xcolor}
\usepackage{tikz}
\usepackage[hidelinks]{hyperref}

\definecolor{bright}{HTML}{F59E0B}
\definecolor{ink}{HTML}{1F2937}

\pagestyle{empty}

\begin{document}

\begin{tikzpicture}[remember picture, overlay]
  % Fold lines (guides)
  \draw[gray, dashed, thin] ([yshift=0cm]current page.west) -- ([yshift=0cm]current page.east);
  \draw[gray, dashed, thin] ([xshift=0cm]current page.north) -- ([xshift=0cm]current page.south);
\end{tikzpicture}

% Top-right quadrant: Front of card (after folding)
\begin{tikzpicture}[remember picture, overlay]
  \node[rotate=180] at ([xshift=-5cm,yshift=7cm]current page.center) {
    \begin{minipage}{9cm}
      \centering
      \vspace{2cm}
      {\color{bright}\fontsize{48}{52}\selectfont\bfseries Happy}\\[0.2em]
      {\color{ink}\fontsize{48}{52}\selectfont\bfseries Birthday!}\\[1em]
      {\color{bright}\Huge $\star$ \; $\star$ \; $\star$}\\[1em]
      {\Large\itshape May this year bring joy, \\ health, and new adventures.}
    \end{minipage}
  };
\end{tikzpicture}

% Bottom-right quadrant: Inside message
\begin{tikzpicture}[remember picture, overlay]
  \node at ([xshift=5cm,yshift=-7cm]current page.center) {
    \begin{minipage}{9cm}
      \centering
      \vspace{2cm}
      {\color{ink}\Large\itshape Dear [Name],}\\[1em]
      {\large Wishing you a wonderful birthday \\ and a year filled with \\ happiness, laughter, \\ and everything you love.}\\[1em]
      {\color{bright}\Huge\itshape With love,}\\[0.3em]
      {\Large\itshape [Your Name]}
    \end{minipage}
  };
\end{tikzpicture}

% Top-left quadrant: Back (after folding)
\begin{tikzpicture}[remember picture, overlay]
  \node[rotate=180] at ([xshift=5cm,yshift=7cm]current page.center) {
    \begin{minipage}{9cm}
      \centering
      \vspace*{\fill}
      {\color{bright}$\bullet$}\\[2em]
      {\small A card made with love.\\ example.com/cards}
    \end{minipage}
  };
\end{tikzpicture}

\end{document}