% ======================================================================
%  FPGA-Neural Datasheet -- preamble / stile
% ======================================================================
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{helvet}
\renewcommand{\familydefault}{\sfdefault}
\usepackage{courier}
\usepackage{microtype}

\usepackage[a4paper,top=2.4cm,bottom=2.3cm,left=2.2cm,right=2.2cm,headheight=15pt]{geometry}
\usepackage[table]{xcolor}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{tabularx}
\usepackage{longtable}
\usepackage{array}
\usepackage{ltablex}
\keepXColumns
\usepackage{multirow}
\usepackage{multicol}
\usepackage{enumitem}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{ragged2e}

% ---------- Palette ----------------------------------------------------
\definecolor{fnDark}{HTML}{0B2E4F}   % blu profondo (primario)
\definecolor{fnBlue}{HTML}{15629B}   % blu medio
\definecolor{fnTeal}{HTML}{0E8F8A}   % accento teal
\definecolor{fnAmber}{HTML}{C9761B}  % accento ambra
\definecolor{fnRed}{HTML}{B22C34}    % fail / warning
\definecolor{fnGreen}{HTML}{2E7D32}  % pass / ok
\definecolor{fnGrey}{HTML}{5B6B78}
\definecolor{fnLight}{HTML}{EEF3F7}  % sfondo chiaro
\definecolor{fnLight2}{HTML}{E2ECF3}
\definecolor{fnRule}{HTML}{9FB4C4}
\definecolor{codebg}{HTML}{F5F7F9}
\definecolor{codekw}{HTML}{15629B}
\definecolor{codecom}{HTML}{5B6B78}
\definecolor{codestr}{HTML}{0E8F8A}

% ---------- Titoli -----------------------------------------------------
\usepackage{titlesec}
\titleformat{\chapter}[display]
  {\normalfont\bfseries\color{fnDark}}
  {\filright\Large\color{fnTeal}CHAPTER \thechapter}
  {6pt}
  {\Huge\filright}
  [\vspace{2pt}{\color{fnRule}\titlerule[1.3pt]}]
\titlespacing*{\chapter}{0pt}{6pt}{18pt}

\titleformat{\section}
  {\normalfont\large\bfseries\color{fnDark}}{\thesection}{0.6em}{}
\titleformat{\subsection}
  {\normalfont\bfseries\color{fnBlue}}{\thesubsection}{0.6em}{}
\titleformat{\subsubsection}
  {\normalfont\bfseries\color{fnGrey}}{\thesubsubsection}{0.6em}{}
\titlespacing*{\section}{0pt}{12pt}{4pt}

% ---------- Header / footer -------------------------------------------
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\renewcommand{\headrulewidth}{0.6pt}
\renewcommand{\footrulewidth}{0.4pt}
\renewcommand{\headrule}{\hbox to\headwidth{\color{fnRule}\leaders\hrule height \headrulewidth\hfill}}
\renewcommand{\footrule}{\hbox to\headwidth{\color{fnRule}\leaders\hrule height \footrulewidth\hfill}}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\fancyhead[L]{\small\color{fnDark}\textbf{FPGA-Neural}}
\fancyhead[R]{\footnotesize\color{fnGrey}\nouppercase{\leftmark}}
\fancyfoot[L]{\small\color{fnGrey}Datasheet~\textbf{Rev.\,\datasheetrev}}
\fancyfoot[C]{\small\color{fnGrey}manvalan/FPGA-Neural}
\fancyfoot[R]{\small\color{fnGrey}\thepage}
\fancypagestyle{plain}{\fancyhf{}%
  \fancyfoot[L]{\small\color{fnGrey}Datasheet~\textbf{Rev.\,\datasheetrev}}%
  \fancyfoot[C]{\small\color{fnGrey}manvalan/FPGA-Neural}%
  \fancyfoot[R]{\small\color{fnGrey}\thepage}%
  \renewcommand{\headrulewidth}{0pt}}

% ---------- tcolorbox --------------------------------------------------
\usepackage[most]{tcolorbox}
\tcbuselibrary{skins,breakable}

% Box "nota"
\newtcolorbox{fnnote}[1][Note]{
  enhanced, breakable, colback=fnLight, colframe=fnTeal,
  boxrule=0.4pt, left=8pt, right=8pt, top=5pt, bottom=5pt,
  fonttitle=\bfseries\color{white}, coltitle=white,
  attach boxed title to top left={xshift=6pt,yshift=-3pt},
  boxed title style={colback=fnTeal,boxrule=0pt,arc=1pt}, title={#1}}

% Box "attenzione"
\newtcolorbox{fnwarn}[1][Warning]{
  enhanced, breakable, colback=fnLight, colframe=fnAmber,
  boxrule=0.4pt, left=8pt, right=8pt, top=5pt, bottom=5pt,
  fonttitle=\bfseries\color{white}, coltitle=white,
  attach boxed title to top left={xshift=6pt,yshift=-3pt},
  boxed title style={colback=fnAmber,boxrule=0pt,arc=1pt}, title={#1}}

% Box "registro/parametro"
\newtcolorbox{fnspec}[1][Specification]{
  enhanced, breakable, colback=white, colframe=fnBlue,
  boxrule=0.7pt, left=8pt, right=8pt, top=5pt, bottom=5pt, arc=1.5pt,
  fonttitle=\bfseries\color{white}, coltitle=white,
  attach boxed title to top left={xshift=6pt,yshift=-3pt},
  boxed title style={colback=fnBlue,boxrule=0pt,arc=1pt}, title={#1}}

% ---------- listings (Verilog) ----------------------------------------
\usepackage{listings}
\lstdefinestyle{verilog}{
  language=Verilog,
  backgroundcolor=\color{codebg},
  basicstyle=\ttfamily\scriptsize,
  keywordstyle=\color{codekw}\bfseries,
  commentstyle=\color{codecom}\itshape,
  stringstyle=\color{codestr},
  numbers=left, numberstyle=\tiny\color{fnGrey}, numbersep=7pt,
  showstringspaces=false, breaklines=true, frame=leftline,
  framerule=1.2pt, rulecolor=\color{fnTeal},
  xleftmargin=12pt, framexleftmargin=10pt, tabsize=2,
  morekeywords={logic,always_ff,always_comb,localparam,signed,genvar,generate,endgenerate}
}
\lstset{style=verilog}

% ---------- Tabelle ----------------------------------------------------
\newcolumntype{L}[1]{>{\raggedright\arraybackslash}p{#1}}
\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}}
\newcolumntype{R}[1]{>{\raggedleft\arraybackslash}p{#1}}
\newcolumntype{Y}{>{\raggedright\arraybackslash}X}
\renewcommand{\arraystretch}{1.25}
\arrayrulecolor{fnRule}

% intestazione tabella colorata
\newcommand{\thd}[1]{\textbf{\color{white}#1}}
\newcommand{\rowh}{\rowcolor{fnDark}}
\newcommand{\rowa}{\rowcolor{fnLight}}

% ---------- Caption ----------------------------------------------------
\usepackage{caption}
\captionsetup{font=small,labelfont={bf,color=fnTeal},labelsep=period}

% ---------- TikZ / pgfplots -------------------------------------------
\usepackage{tikz}
\usetikzlibrary{arrows.meta,positioning,calc,shapes.geometric,shapes.misc,
  fit,backgrounds,chains,decorations.pathreplacing,decorations.markings,
  matrix,shadows.blur}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\usepackage{tikz-timing}

% stili di blocco riusabili
\tikzset{
  fnblock/.style={draw=fnBlue,fill=fnLight,rounded corners=2pt,
    minimum height=9mm,minimum width=24mm,align=center,font=\small,
    inner sep=4pt,line width=0.7pt},
  fnblockT/.style={fnblock,draw=fnTeal,fill=fnLight2},
  fnblockD/.style={fnblock,draw=fnDark,fill=fnDark,text=white},
  fnblockA/.style={fnblock,draw=fnAmber,fill=white},
  fnreg/.style={draw=fnGrey,fill=white,minimum height=8mm,align=center,
    font=\footnotesize,inner sep=3pt},
  fnstate/.style={draw=fnBlue,fill=fnLight,circle,minimum size=13mm,
    align=center,font=\scriptsize,line width=0.7pt},
  fnarrow/.style={-{Stealth[length=2.6mm]},line width=0.8pt,draw=fnDark},
  fnarrowT/.style={-{Stealth[length=2.6mm]},line width=0.8pt,draw=fnTeal},
  fnbus/.style={-{Stealth[length=3mm]},line width=1.6pt,draw=fnBlue},
  fnlbl/.style={font=\scriptsize\itshape,fill=white,inner sep=1pt,text=fnGrey}
}

% ---------- varie ------------------------------------------------------
\newcommand{\reg}[1]{\texttt{\textbf{#1}}}
\newcommand{\sig}[1]{\texttt{#1}}
\newcommand{\op}[1]{\texttt{\color{fnBlue}#1}}
\newcommand{\PASS}{\textcolor{fnGreen}{\textbf{PASS}}}
\newcommand{\FAIL}{\textcolor{fnRed}{\textbf{FAIL}}}
\newcommand{\OK}{\textcolor{fnGreen}{\textbf{OK}}}
\newcommand{\code}[1]{\texttt{#1}}

\usepackage{enumitem}
\setlist{noitemsep,topsep=2pt,leftmargin=1.4em}

\usepackage[hidelinks,colorlinks=true,linkcolor=fnBlue,urlcolor=fnTeal,
  citecolor=fnBlue]{hyperref}