git push heroku masterで [remote rejected] master -> master (pre-receive hook declined)のエラー

ボールドテキストherokuでデプロイしようとしたところ躓き検索をしながら何度改善を試みても同じエラーが出力されます。
お心当たりある方いましたらヒント頂けましたら幸いです。

###git push heroku master を実行したログ

remote: -----> Preparing app for Rails asset pipeline
remote:        Running: rake assets:precompile

remote:        I, [2016-04-06T06:40:43.370833 #781]  INFO -- : Writing /tmp/build_a70a5c4c10ba90eef6e928399e119283/public/assets/font-awesome-4.3.0/fonts/fontawesome-webfont-58a40baf78a6a22d1e948389d6ce2c72.woff2

remote:        I, [2016-04-06T06:40:43.373819 #781]  INFO -- : Writing /tmp/build_a70a5c4c10ba90eef6e928399e119283/public/assets/noimage-b331e23e81f288e8ae7381ce8316268a.png
remote:        I, [2016-04-06T06:40:46.222068 #781]  INFO -- : Writing /tmp/build_a70a5c4c10ba90eef6e928399e119283/public/assets/application-adca4e8680d5f2b92fb5b87299237442.js
remote:        rake aborted!
remote:        Sass::SyntaxError: Invalid CSS after "z-index": expected ";", was ":10;"
remote:        (in /tmp/build_a70a5c4c10ba90eef6e928399e119283/app/assets/stylesheets/application.css)
remote:        (sass):245
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:1147:in `expected'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:1085:in `expected'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:1080:in `tok!'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:586:in `block in declaration_or_ruleset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:1123:in `call'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:1123:in `rethrow'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:592:in `declaration_or_ruleset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:554:in `block_child'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:546:in `block_contents'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:535:in `block'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:529:in `ruleset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:553:in `block_child'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:546:in `block_contents'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:82:in `stylesheet'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/scss/parser.rb:27:in `parse'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/engine.rb:342:in `_to_tree'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/engine.rb:315:in `_render'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sass-3.2.19/lib/sass/engine.rb:262:in `render'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/sass_compressor.rb:24:in `evaluate'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/tilt-1.4.1/lib/tilt/template.rb:103:in `render'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/context.rb:197:in `block in evaluate'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/context.rb:194:in `each'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/context.rb:194:in `evaluate'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/bundled_asset.rb:25:in `initialize'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/base.rb:377:in `new'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/base.rb:377:in `build_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/index.rb:94:in `block in build_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/caching.rb:58:in `cache_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/index.rb:93:in `build_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/base.rb:287:in `find_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/index.rb:61:in `find_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/manifest.rb:211:in `block in find_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/manifest.rb:257:in `benchmark'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/manifest.rb:210:in `find_asset'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/manifest.rb:119:in `block in compile'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/manifest.rb:118:in `each'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/sprockets/manifest.rb:118:in `compile'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.1/lib/sprockets/rails/task.rb:60:in `block (3 levels) in define'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-2.11.0/lib/rake/sprocketstask.rb:146:in `with_logger'
remote:        /tmp/build_a70a5c4c10ba90eef6e928399e119283/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.1/lib/sprockets/rails/task.rb:59:in `block (2 levels) in define'
remote:        Tasks: TOP => assets:precompile
remote:        (See full trace by running task with --trace)
remote:  !     Precompiling assets failed.
remote:  !     Push rejected, failed to compile Ruby app
remote: Verifying deploy...
remote: !	Push rejected to exampleapp.
remote:
To https://git.heroku.com.example.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/******'


```

###gemfile
```
source 'https://rubygems.org'
ruby '2.0.0'
#ruby-gemset=railstutorial_rails_4_0

gem 'rails', '4.0.5'
gem 'devise'
gem 'kaminari'
gem 'ransack'
gem 'bootstrap-sass','2.3.2.0'
gem 'sprockets','2.11.0'
gem 'jquery-turbolinks'


group :development, :test do
  gem 'sqlite3', '1.3.8'
  gem 'rspec-rails', '2.13.1'
  gem 'faker'              
  gem 'faker-japanese'     
end
group :development do
  gem 'rails-erd'

end

group :test do
  gem 'selenium-webdriver', '2.35.1'
  gem 'capybara', '2.1.0'
end

gem 'sass-rails', '4.0.5'
gem 'uglifier', '2.1.1'
gem 'coffee-rails', '4.0.1'
gem 'jquery-rails', '3.0.4'
gem 'turbolinks', '1.1.1'
gem 'jbuilder', '1.0.2'

group :doc do
  gem 'sdoc', '0.3.20', require: false
end

group :production do
  gem 'pg'
  gem 'rails_12factor'
end

```

###config/application.rb
```lang-言語名
require File.expand_path('../boot', __FILE__)

require 'rails/all'


Bundler.require(*Rails.groups)

module Rental
  class Application < Rails::Application
     config.time_zone = 'Tokyo'
     config.assets.initialize_on_precompile = false
config.assets.precompile += %w(*.png *.jpg *.jpeg *.gif
  end
end
```
###environments/production.rb
```lang-言語名
Rental::Application.configure do
  config.cache_classes = true

  config.eager_load = true
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  config.serve_static_assets = true

  config.assets.js_compressor = :uglifier
  config.assets.compile = true

  config.assets.digest = true
  config.assets.version = '1.0'

   config.force_ssl = true

  config.log_level = :info

  config.i18n.fallbacks = true
  config.active_support.deprecation = :notify
  config.log_formatter = ::Logger::Formatter.new
end
```

エラーログから検索行い少しでも改善できそうなことは試しました。
お手上げ状態です、、、、何卒お力お貸しください
質問内容に不備ありましたらすぐに直しますのでご指摘いただけましたら幸いです。