RuinAdventurer/Scripts/UI/Common/UIStyle.cs

using Godot;

public static class UIStyle
{
    private static readonly Color Background = new Color("#101317");
    private static readonly Color Surface = new Color("#171d22");
    private static readonly Color SurfaceStrong = new Color("#202a31");
    private static readonly Color SurfaceSoft = new Color("#25343d");
    private static readonly Color Accent = new Color("#6ec6b8");
    private static readonly Color AccentStrong = new Color("#9be7d8");
    private static readonly Color Warning = new Color("#d69b5a");
    private static readonly Color Text = new Color("#e8f0ed");
    private static readonly Color MutedText = new Color("#aab8b4");

    public static void Apply(Control root)
    {
        if (root == null) return;

        ApplyToControl(root);

        foreach (Node child in root.GetChildren())
        {
            Control control = child as Control;
            if (control != null)
            {
                Apply(control);
            }
        }
    }

    private static void ApplyToControl(Control control)
    {
        PanelContainer panel = control as PanelContainer;
        if (panel != null)
        {
            StylePanel(panel);
        }

        Button button = control as Button;
        if (button != null)
        {
            StyleButton(button);
        }

        LineEdit lineEdit = control as LineEdit;
        if (lineEdit != null)
        {
            StyleLineEdit(lineEdit);
        }

        OptionButton optionButton = control as OptionButton;
        if (optionButton != null)
        {
            StyleButton(optionButton);
        }

        RichTextLabel label = control as RichTextLabel;
        if (label != null)
        {
            StyleLabel(label);
        }

        TextureButton textureButton = control as TextureButton;
        if (textureButton != null)
        {
            StyleTextureButton(textureButton);
        }

        TextureRect textureRect = control as TextureRect;
        if (textureRect != null)
        {
            textureRect.CustomMinimumSize = new Vector2(26, 26);
        }
    }

    private static void StylePanel(PanelContainer panel)
    {
        Color color = Surface;

        if (panel.Name.ToString().Contains("Header") || panel.Name.ToString().Contains("Footer"))
        {
            color = Background;
        }

        if (panel.Name.ToString().Contains("GameOver") || panel.Name.ToString().Contains("Menu"))
        {
            color = SurfaceStrong;
        }

        StyleBoxFlat style = CreateBox(color, Accent, 1, 8);
        panel.AddThemeStyleboxOverride("panel", style);
    }

    private static void StyleButton(Button button)
    {
        button.CustomMinimumSize = new Vector2(112, 34);
        button.AddThemeStyleboxOverride("normal", CreateBox(SurfaceSoft, Accent, 1, 6));
        button.AddThemeStyleboxOverride("hover", CreateBox(new Color("#314750"), AccentStrong, 1, 6));
        button.AddThemeStyleboxOverride("pressed", CreateBox(new Color("#1a2b30"), AccentStrong, 1, 6));
        button.AddThemeStyleboxOverride("focus", CreateBox(new Color(0, 0, 0, 0), AccentStrong, 1, 6));
        button.AddThemeColorOverride("font_color", Text);
        button.AddThemeColorOverride("font_hover_color", AccentStrong);
        button.AddThemeColorOverride("font_pressed_color", AccentStrong);
        button.AddThemeColorOverride("font_disabled_color", MutedText);
    }

    private static void StyleLineEdit(LineEdit lineEdit)
    {
        lineEdit.CustomMinimumSize = new Vector2(120, 34);
        lineEdit.AddThemeStyleboxOverride("normal", CreateBox(new Color("#11191d"), Accent, 1, 6));
        lineEdit.AddThemeStyleboxOverride("focus", CreateBox(new Color("#142126"), AccentStrong, 1, 6));
        lineEdit.AddThemeColorOverride("font_color", Text);
        lineEdit.AddThemeColorOverride("font_placeholder_color", MutedText);
    }

    private static void StyleLabel(RichTextLabel label)
    {
        label.AddThemeColorOverride("default_color", Text);
        label.AddThemeColorOverride("font_shadow_color", new Color("#00000080"));
    }

    private static void StyleTextureButton(TextureButton textureButton)
    {
        textureButton.CustomMinimumSize = new Vector2(38, 38);
        textureButton.Modulate = Text;
        textureButton.SelfModulate = Text;
        textureButton.StretchMode = TextureButton.StretchModeEnum.KeepAspectCentered;
    }

    private static StyleBoxFlat CreateBox(Color color, Color borderColor, int borderWidth, int radius)
    {
        StyleBoxFlat style = new StyleBoxFlat
        {
            BgColor = color,
            BorderColor = borderColor,
            BorderWidthTop = borderWidth,
            BorderWidthBottom = borderWidth,
            BorderWidthLeft = borderWidth,
            BorderWidthRight = borderWidth,
            CornerRadiusTopLeft = radius,
            CornerRadiusTopRight = radius,
            CornerRadiusBottomLeft = radius,
            CornerRadiusBottomRight = radius,
            ContentMarginLeft = 8,
            ContentMarginRight = 8,
            ContentMarginTop = 6,
            ContentMarginBottom = 6
        };

        return style;
    }

    public static Color GetWarningColor()
    {
        return Warning;
    }
}