css is not working in magento2

Question

This is my default_head_blocks.xml file code

<css src="css/source/_style-l.css" />   
    <css src="css/source/styles-m.css" />
    <css src="css/source/styles-l.css" media="screen and (min-width: 768px)"/>
    <css src="css/source/print.css" media="print" />
</head>

Is an application set to developer mode and all the CSS file incorrect location?

Answer 1

Use This: (Change the css path as required)

<action method="addCss" ifconfig="porto_settings/general/rtl" condition="0"><stylesheet>css/local.css</stylesheet></action>

Answer 2

First you have to configure compilation of style in admin path given below

Store -> Configuration -> Advanced -> Developer -> Front-end development workflow

change to

Client side less compilation

Then edit your theme styles module wise and other web/css/source (common style)

app/design/frontend/vendor_name/theme_name

Answer 3

You need to refer below link.

http://devdocs.magento.com/guides/v2.1/config-guide/cli/config-cli-subcommands-static-view.html

also you need to run command for deploy, you can use anyone command

php bin/magento setup:static-content:deploy
or
php bin/magento dev:source-theme:deploy