<link rel="stylesheet" type="text/css" href="main.css" />

How to choose p tag?

HTML File

<div><p style="color:blue">Question</p></div>

CSS File

div > p {
    border : 1px solid slategray;
}

CSS Priority

id > class > element

How to select ID, Class, Element(Tag)

HTML file

<div id="a" class="b"> 
  text..
</div>

CSS file

#a { 
  color : red;
}
.b {
  color : blue;
}
div {
  color : green;
}

Search Keyword : CSS specificity

CSS Selector

Select group

h1, span, div {color : red}
h1, span, div#id {color : red}
h1.span, div.classname {color : red}

nth-child

<div id="jisu">
  <h2> one </h2>
  <p>2</p>
  <p>3</p>
  <p>4</p>
  <p>5</p>
</div>

#jisu > p:nth-child(2) {color : red}

BOX Model

CSS Positioning Layout

CSS Float Layout

Reference : https://internetingishard.com/html-and-css/floats/

CSS Flex

Reference : https://css-tricks.com/snippets/css/a-guide-to-flexbox/

z-index

Reference : https://www.w3schools.com/cssref/pr_pos_z-index.asp

CSS pre-processor

Why we use the CSS pre-processor? Reference : https://webkul.com/blog/advantages-using-less/

Transition, Transform

Reference : https://thoughtbot.com/blog/transitions-and-transforms

Reference lecture : https://www.inflearn.com/course/html-css-%EA%B0%95%EC%A2%8C-codesquad#