Flat-Plat is a Material Design-like theme for GNOME/GTK+ based desktop environments.
It supports GTK3, GTK2, Metacity, GNOME Shell, Unity, MATE, LightDM, GDM, Chrome theme, etc.

• Supports ripple effect animations (only GTK3 apps).
• Supports both light and dark variants.
• Supports dark or light titlebar versions.
• Supports compact version for low resolution.
• Supports Dash to Dock extension's theming.
• Supports Workspaces to Dock extension's theming.
• Supports Chrome/Chromium theme and scrollbars extension.
• Appears more beautifully when you use a font family including Medium and Light weights.

• GTK+ 3.18 or later
• gnome-themes-standard
• pixmap (or pixbuf) engine
• murrine engine

• GNOME Shell 3.18 or later
• Unity 7.4 or later
• MATE 1.14 or later

Arch Linux users can install from the AUR package maintained by @cthbleachbit.

Fedora and EPEL users can also install from a Copr repository.

1. Open the terminal and run the following commands:

cd /tmp
curl -sL https://github.com/nana-4/Flat-Plat/archive/v20170515.tar.gz | tar xz
cd Flat-Plat-20170515 && sudo ./install.sh

2. Select the theme using gnome-tweak-tool or other suitable tools.

3. Optionally;

• Set the font size to 9.75 (= 13px at 96dpi) or 10.5 (= 14px at 96dpi).
• Open the chrome folder on /usr/share/themes/Flat-Plat* and drag and drop the .crx files onto the Chrome/Chromium Extensions page.

• Delete the installed directories.

  sudo rm -rf /usr/share/themes/Flat-Plat{,-compact,-dark,-dark-compact,-light,-light-compact}

You can change the GDM theme by replacing the default GNOME Shell theme.
However, if it fails, the desktop environment may not operate correctly. So please be careful if doing this.

• When applying this, other third-party GNOME Shell themes would look broken until you restore to the original theme.
• If GNOME Shell has been updated, it will be restored to the original theme, so you will need to install this again.

1. First select the GTK+ theme, then back up and replace the existing .gresource file.

GTK_THEME=$(gsettings get org.gnome.desktop.interface gtk-theme | sed "s/'//g")
sudo cp -iv --backup /usr/share{/themes/$GTK_THEME,}/gnome-shell/gnome-shell-theme.gresource

Developer note:
If you don't want to overwrite the backup on the second and subsequent runs, delete the --backup option.

2. Restart GNOME Shell. (If you are running GNOME on Xorg, press Alt + F2 then type r.)

1. Restore to the original theme from the backup.

sudo mv -iv /usr/share/gnome-shell/gnome-shell-theme.gresource{~,}

2. Restart GNOME Shell. (If you are running GNOME on Xorg, press Alt + F2 then type r.)

_{Screenshots Details: Icons: Paper | Font: M+ 1C 10.5pt | Dock's icon size: 48px + fixed | Wallpapers}

If you find any bugs or mistakes, please report it to the issue tracker or send a pull request.
Any contribution will be much appreciated.

• Supports of Xfce theme
• Supports of Firefox theme (in progress)
• Supports of overlay scrollbars for Chrome/Chromium extension
• GNOME Terminal color pallet (if possible)
• Material Design like cursor theme

Flat-Plat is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for details.

• This theme is based on Adwaita by GNOME.
• The included symbolic icons are based on Material Design icons by Google.
• Chrome/Chromium scrollbars extension was forked from Adwaita-chrome-scrollbar by GNOME Integration Team.
• The original concept is Google's Material Design.

Also thank you for every upstream developers and all contributors.