My Wezterm config.

wezterm.lua

--==============================================================================
--                                         __                    
--                    _      _____  ____  / /____  _________ ___ 
--                   | | /| / / _ \/_  / / __/ _ \/ ___/ __ `__ \
--                   | |/ |/ /  __/ / /_/ /_/  __/ /  / / / / / /
--                   |__/|__/\___/ /___/\__/\___/_/  /_/ /_/ /_/ 
--
--==============================================================================
--                               @cfsanderson

local wezterm = require 'wezterm';

-- A helper function for fallback fonts
function font_with_fallback(name, params)
  local names = {name, "JetBrains Mono", "Hack"}
  return wezterm.font_with_fallback(names, params)
end

wezterm.on("format-tab-title", function(tab, tabs, panes, config, hover, max_width)
  local pane_title = tab.active_pane.title
  local user_title = tab.active_pane.user_vars.panetitle

  if user_title ~= nil and #user_title > 0 then
    pane_title = user_title
  end

  return {
    {Text="      " .. pane_title .. "      "},
  }
end)

return {
    -- Fonts
    font = font_with_fallback("FiraCode Nerd Font"),
    font_rules= {
        -- use JetBrains Mono for italic 
        {
            italic = true,
            font = font_with_fallback("JetBrains Mono Italic"),
        },

        -- use JetBrains Mono for bold italic 
        {
          italic = true,
          intensity = "Bold",
          font = font_with_fallback("JetBrains Mono Bold Italic"),
        },

        -- For half-intensity text, use a lighter weight font
        {
          intensity = "Half",
          font = font_with_fallback("Fira Code Light"),
        },
    },

    font_size = 13.0,

    -- Colors
    bold_brightens_ansi_colors = true,

    colors = {
        foreground = "#e1d7c7",
        background = "#0b0d0f",
        cursor_bg = "#ddc7a1",
        cursor_fg = "#ddc7a1",
        cursor_border = "#ddc7a1",
        split = "#3b4b58",

        ansi = {
            "#3c3836", "#b85651", "#8f9a52", "#c18f41", "#68948a", "#ab6c7d", "#72966c", "#ada291",
        },

        brights = {
            "#5a524c", "#b85651", "#a9b665", "#d8a657", "#7daea3", "#d3869b", "#89b482", "#dcc6a3",
        },

        tab_bar = {
            background = "#8F9A52",
            active_tab = {
                bg_color = "#0B0D0F",
                fg_color = "#e1d7c7",
                intensity = "Bold",
                underline = "None",
                italic = false,
                strikethrough = false,
            },

            inactive_tab = {
                bg_color = "#8F9A52",
                fg_color = "#0B0D0F",
                intensity = "Bold",
                underline = "None",
                italic = false,
                strikethrough = false,
            },

            -- The new tab button
            new_tab = {
                bg_color = "#8F9A52",
                fg_color = "#8F9A52",
            },
        },
    },
    
    -- No close prompt
    window_close_confirmation = "NeverPrompt",

    -- Padding
    window_padding = {left = 25, right = 25, top = 0, bottom = 15},

    -- No opacity
    inactive_pane_hsb = {saturation = 1.0, brightness = 1.0},

    -- Tabs
    enable_tab_bar = true,
    tab_bar_at_bottom = true,
    hide_tab_bar_if_only_one_tab = true,
    show_tab_index_in_tab_bar = true,

    -- Initial size (not exact, just big)
    initial_cols = 300,
    initial_rows = 400,

    -- Custom keybindings
    -- ctrl + shift + opt + arrow up/down/left/right resizes current pane.
    keys = {
        -- switch/activate panes like Tmux (with Vim directions)
        { key = "h", mods="CTRL|SHIFT", action=wezterm.action{ActivatePaneDirection="Left"}},
        { key = "l", mods="CTRL|SHIFT", action=wezterm.action{ActivatePaneDirection="Right"}},
        { key = "k", mods="CTRL|SHIFT", action=wezterm.action{ActivatePaneDirection="Up"}},
        { key = "j", mods="CTRL|SHIFT", action=wezterm.action{ActivatePaneDirection="Down"}},

        -- split panes like Tmux
        {key="u", mods="CTRL|SHIFT", action=wezterm.action{SplitHorizontal={domain="CurrentPaneDomain"}}},
        {key="i", mods="CTRL|SHIFT", action=wezterm.action{SplitVertical={domain="CurrentPaneDomain"}}},
    },
}