How to use pure CSS to implement a single-element McDonald’s logo (source code attached)

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Effect preview

Source code download

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

Code Interpretation

Define dom, only 1 element:

<div></div>

Centered display:

body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, darkred, black);
}

Define container size:

.mcdonalds {
    width: 36em;
    height: 30em;
    font-size: 5px;
    color: red;
    background-color: currentColor;
}

Use pseudo elements to draw the shape of the left half n of the letter m:

.mcdonalds {
    position: relative;
    overflow: hidden;
}

.mcdonalds::before {
    content: '';
    position: absolute;
    width: 20em;
    height: calc(30em * 2);
    box-sizing: border-box;
    border: solid yellow;
    border-width: 2.2em 4.4em;
    border-radius: 50%;
}

Copy the left half, which is the shape of the right half n, and together with the left side form the letter m:

.mcdonalds::before {
    filter: drop-shadow(16em 0 0 yellow);
}

Use pseudo elements to cover the letter m and a little bit at the bottom of the middle vertical line to make the vertical lines on both sides appear longer:

.mcdonalds::after {
    content: '';
    position: absolute;
    width: 6em;
    height: 1.5em;
    background-color: currentColor;
    left: calc((36em - 6em) / 2);
    bottom: 0;
}

Finally, extend the red background outwards:

.mcdonalds {
    box-shadow: 0 0 0 10em;
}

You're done !

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