How to use pure CSS to implement a red angry bird (with code)

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Effect preview

Source code download

https://github.com/comehope/front- end-daily-challenges

Code Interpretation

Define dom, the container contains 6 elements, representing the head, eyes, eyebrows, mouth, crown feathers, and tail:

Centered display:

body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: antiquewhite;
}

Set the common attributes of child elements:

.red * {
    position: absolute;
}

.red *::before,
.red *::after {
    content: '';
    position: absolute;
}

Define the container size:

.red {
    width: 12em;
    height: 11em;
    font-size: 16px;
    position: relative;
}

Draw the outline of the head and define the stroke parameters as variables. Because it will be used later:

.red {
    --border: 0.2em solid #6a0306;
}

.head {
    width: inherit;
    height: inherit;
    background-color: #dc002d;
    border-radius: 45% 55% 45% 45% / 55% 60% 40% 45%;
    border: var(--border);
}

Use pseudo elements to draw the outline of the eyes:

.eyes::before,
.eyes::after {
    width: 2.4em;
    height: 2.6em;
    background: white;
    border-radius: 50%;
    border: var(--border);
}

.eyes::before {
    top: 3.7em;
    left: 5.5em;
    z-index: 1;
}

.eyes::after {
    top: 3.8em;
    left: 7.8em;
}

Use radial gradient to draw the eyeballs and pupils:

.eyes::before,
.eyes::after {
    background: 
        radial-gradient(
            circle at calc(var(--eyeball-left) + 6%) 48%,
            white 0.1em,
            transparent 0.1em
        ),
        radial-gradient(
            circle at var(--eyeball-left) 48%,
            black 0.5em,
            transparent 0.5em
        ),
        white;
}

.eyes::before {
    --eyeball-left: 65%;
}

.eyes::after {
    --eyeball-left: 41%;
}

Use pseudo elements Use elements to draw the eyebrows:

.eyebrows::before,
.eyebrows::after {
    height: 1.1em;
    background-color: black;
    top: 3.6em;
    z-index: 2;
}

.eyebrows::before {
    left: 5em;
    transform: skewY(12deg);
    width: 3.4em;
}

.eyebrows::after {
    left: 8.2em;
    transform: skewY(-15deg);
    width: 3.1em;
}

Draw the outline of the mouth:

.mouth {
    width: 2.8em;
    height: 2.8em;
    background-color: #fca90d;
    top: 6em;
    left: 7em;
    z-index: 3;
    border-radius: 20% 0 20% 10%;
    transform: rotate(34deg) skewX(-15deg);
    border: 0.1em solid black;
}

Use pseudo elements to draw the dividing line between the upper and lower jaw:

.mouth::before {
    width: 3.4em;
    height: 4em;
    border: 0.2em solid;
    top: -1.6em;
    left: -1.8em;
    border-radius: 0 0 40% 0;
    transform: rotate(42deg);
    border-color: transparent black transparent transparent;
}

Draw the left side of the crown feathers :

.hair {
    width: 1.2em;
    height: 3em;
    background-color: #dc002d;
    border-radius: 50%;
    border: var(--border);
    top: -1.8em;
    left: 2.8em;
    transform: rotate(-70deg);
    border-bottom-color: transparent;
}

Use pseudo elements to draw the right side of the crest feathers:

.hair::before {
    width: inherit;
    height: inherit;
    background-color: inherit;
    border-radius: inherit;
    border: inherit;
    top: 1em;
    left: 0.8em;
    transform: rotate(20deg);
}

Use pseudo elements to cover the excess edges of the crest feathers:

.hair::after {
    width: 3em;
    height: 2em;
    background-color: #dc002d;
    border-radius: 50%;
    top: 2.3em;
    left: -1.5em;
    transform: rotate(70deg);
}

Draw the center of the tail The longest feather:

.tail {
    width: 3em;
    height: 1em;
    background-color: black;
    top: 40%;
    left: -1.8em;
    z-index: -1;
    transform: rotate(15deg);
}

Use pseudo elements to draw the two shorter feathers in the tail:

.tail::before,
.tail::after {
    width: inherit;
    height: 70%;
    background-color: black;
    left: 0.6em;
}

.tail::before {
    transform: rotate(25deg);
    top: -0.4em;
}

.tail::after {
    transform: rotate(-20deg);
    top: 0.8em;
}

Use pseudo elements to draw the feathers on the chest:

.head {
    overflow: hidden;
}

.head::before {
    width: inherit;
    height: inherit;
    background-color: #e3c4ab;
    border-radius: inherit;
    top: 65%;
    left: 25%;
}

Next draw shadows to enhance the three-dimensional effect.

Add shadows to the head:

.head {
    box-shadow: 
      inset 0.5em -0.5em 0.3em 0.2em rgba(0, 0, 0, 0.2),
      inset -1em 0.8em 1.5em -0.5em rgba(237, 178, 144, 0.7);
}

Add shadows to the eyes:

.eyes::before {
    box-shadow: -0.2em 0.2em 0.2em 0.3em rgba(0, 0, 0, 0.2);
}

.eyes::after {
    box-shadow: 0.2em 0.2em 0.4em 0.3em rgba(0, 0, 0, 0.1);
}

Add shadows to the mouth:

.mouth {
    box-shadow: 
      inset 0.2em -0.4em 1em rgba(0, 0, 0, 0.4),
      inset 0 0.5em 0.5em rgba(255, 255, 255, 0.3);
}

Done!

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