CSs is a styling language which is used for modifying the appearance of the content of web pages.. The syntax
of CSs is straightforward and easy to understand.. The main selectors are element class and id selectors. the
most common and useful selector is the class selector.. ids are supposed to be unique across the webpage and
each element can only have one id.. Each element can have multiple different classes in the same attribute as
long as they 're separated by a space. In order to select an element by class. We need to use a period before the
class name as the CSs selector. This period tells CSs that whatever follows is a class name and not an Html
element Name.. classes are the most common selector used because they are amazing for creating reusable
components.. The most common combination of selectors is when you want to share. A set of style properties
and values between multiple selectors. all the CSs combination selectors can be used together to create even
more complex combinations if needed.. there is also one other form of selector, the Everything selector that is
used to select every element on the web page..
using external CSs files like this is the best way to use CSs since it separates the presentation and contents of
websites. be added to any web page by using a simple link element inside the head.. The link element is a
simple element that can be used to link files to the Html and its main use is to link CSs. the rel attribute stands
for relationship to define relationship between the linked file and the Html document. In the case of CSs, the rel
attribute is stylesheet. in order the id selector is the most important then the class selector and then the element
selector. anything in here would override anything in here that is the style that will be applied. Also if we have an
inline style. So for example, in here, if we put style and we set the color to be equal to black for. Example, this will
override everything in your style sheet. the default value for text color is inherit, which means it inherits whatever
its parent 's value is.. If we style a body tag in here and we set the color to be red. This will change all the text in
our entire application to be read that is underneath the body tag unless otherwise specified, such as blue, for
example,..
The last way to define colors in Html is using HSl, which stands for huge saturation likeness. the first value hue
goes between 0 and 360 and determines which color you're going to be using.. The final value will be the alpha
value which would be between zero and 255 again. So if we wanted to be entirely opaque. We would do ff save
that and we get entirely opaque black. at 100 percent lightness which is the max you 're going to have an entirely
white color. the box model works where the inside of the box model. The very center is your actual content. This
is going to be your text image. the very next thing is padding. Padding padding is essentially just spacing
between your content and your padding. the next unit we have is percentage percentage which will take up
whatever percentage of the given width. that the object has inside of its parent. a type of font or scale called em
scales off of the actual font size. So if your font size is 16 pixels, then 1 em equals 16 pixels 2em would be 32
pixels and so on there 's also another type of scale called rem, which scales off the font size of the root of your
document. rem scales off. of the parent of a document, so if we used rem here the size of a box stays the same
even if we bump this up to 200 pixels. For example, let 's do 30 actually as you can see pumped up to 40. Still
does n't change the size..
of CSs is straightforward and easy to understand.. The main selectors are element class and id selectors. the
most common and useful selector is the class selector.. ids are supposed to be unique across the webpage and
each element can only have one id.. Each element can have multiple different classes in the same attribute as
long as they 're separated by a space. In order to select an element by class. We need to use a period before the
class name as the CSs selector. This period tells CSs that whatever follows is a class name and not an Html
element Name.. classes are the most common selector used because they are amazing for creating reusable
components.. The most common combination of selectors is when you want to share. A set of style properties
and values between multiple selectors. all the CSs combination selectors can be used together to create even
more complex combinations if needed.. there is also one other form of selector, the Everything selector that is
used to select every element on the web page..
using external CSs files like this is the best way to use CSs since it separates the presentation and contents of
websites. be added to any web page by using a simple link element inside the head.. The link element is a
simple element that can be used to link files to the Html and its main use is to link CSs. the rel attribute stands
for relationship to define relationship between the linked file and the Html document. In the case of CSs, the rel
attribute is stylesheet. in order the id selector is the most important then the class selector and then the element
selector. anything in here would override anything in here that is the style that will be applied. Also if we have an
inline style. So for example, in here, if we put style and we set the color to be equal to black for. Example, this will
override everything in your style sheet. the default value for text color is inherit, which means it inherits whatever
its parent 's value is.. If we style a body tag in here and we set the color to be red. This will change all the text in
our entire application to be read that is underneath the body tag unless otherwise specified, such as blue, for
example,..
The last way to define colors in Html is using HSl, which stands for huge saturation likeness. the first value hue
goes between 0 and 360 and determines which color you're going to be using.. The final value will be the alpha
value which would be between zero and 255 again. So if we wanted to be entirely opaque. We would do ff save
that and we get entirely opaque black. at 100 percent lightness which is the max you 're going to have an entirely
white color. the box model works where the inside of the box model. The very center is your actual content. This
is going to be your text image. the very next thing is padding. Padding padding is essentially just spacing
between your content and your padding. the next unit we have is percentage percentage which will take up
whatever percentage of the given width. that the object has inside of its parent. a type of font or scale called em
scales off of the actual font size. So if your font size is 16 pixels, then 1 em equals 16 pixels 2em would be 32
pixels and so on there 's also another type of scale called rem, which scales off the font size of the root of your
document. rem scales off. of the parent of a document, so if we used rem here the size of a box stays the same
even if we bump this up to 200 pixels. For example, let 's do 30 actually as you can see pumped up to 40. Still
does n't change the size..
