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[[!meta title="Super Mario Blocks in CSS"]]
[[!meta date="2019-02-15"]]
Just because we can, let's make a quick demo on how to build interactive elements based off the original Mario punch blocks.
What our final product will look like:
[Live CodePen Example](https://codepen.io/bradleytaunt/pen/JjEPOVe)
## The HTML
The set of Mario blocks doesn't require a huge amount of effort for it's `html` structure, we only need:
- Parent div for each block
- Checkbox input
- Checkbox label
- Inner label divs to represent the block "dots"
**Sidenote**: This is only how *I* chose to add the inner dots to the Mario blocks. There are many other ways to create these, so please feel free to implement them however you see fit.
<!-- Main parent block -->
<div class="mario-block">
<!-- Checkbox input (disabled by default) -->
<input type="checkbox" id="1" disabled>
<!-- Checkbox label -->
<label for="1">
<!-- Inner dots for blocks -->
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
</label>
</div>
Now we just add as many default blocks we want, along with the interactive punch block (`.mario-block--question`):
<div class="mario-block">
<input type="checkbox" id="1" disabled>
<label for="1">
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
</label>
</div>
<div class="mario-block">
<input type="checkbox" id="2" disabled>
<label for="2">
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
</label>
</div>
<div class="mario-block mario-block--question">
<input type="checkbox" id="3">
<label for="3">
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
<div class="question-mark"></div>
</label>
</div>
<div class="mario-block">
<input type="checkbox" id="4" disabled>
<label for="4">
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
<div class="dot"></div>
</label>
</div>
## The CSS
First we need to remove the default `checkbox` input styling and place all new styling on it's corresponding `label`.
/* Mario block parent div */
.mario-block {
display: inline-block;
height: 80px;
margin-right: -7px; /* Fixes inline-block margin bug */
position: relative;
width: 80px;
}
/* Hide default checkbox input */
.mario-block input {
position: absolute;
visibility: hidden;
z-index: -1;
}
Now to target the `label` elements found inside the block:
/* Style checkbox label accordingly */
.mario-block label {
background: #F88D2E;
border: 4px solid #070000;
box-shadow: inset -4px -4px 0 #965117, inset 4px 4px 0 #FAB89B;
display: block;
height: 100%;
position: relative;
width: 100%;
}
Next we style our included `.dots` elements to be placed in the four corners of each block:
.mario-block .dot {
background: #070000;
height: 5px;
position: absolute;
width: 5px;
}
.mario-block .dot:nth-child(1) {
left: 4px;
top: 4px;
}
.mario-block .dot:nth-child(2) {
right: 4px;
top: 4px;
}
.mario-block .dot:nth-child(3) {
bottom: 4px;
left: 4px;
}
.mario-block .dot:nth-child(4) {
bottom: 4px;
right: 4px;
}
### Punch-able block
Now we need to include the "question mark" SVG and custom CSS for the interactive Mario block. You can <a href="/public/images/mario-block-question-mark.svg">download a copy</a> of the custom `svg` question mark I created.
.mario-block--question label {
cursor: pointer;
}
.mario-block--question .question-mark {
background-image: url('/public/images/mario-block-question-mark.svg');
background-position: center;
background-repeat: no-repeat;
background-size: 40px;
bottom: 0;
left: 0;
position: absolute;
right: 0;
top: 0;
z-index: 1;
}
### The last piece
The last item we need to design is the `checked` state of the interactive question mark block. The extra inner dark dashes will be added as `pseudo` elements:
/* Mario block in `checked` state */
.mario-block input:checked + label {
background: #885818;
box-shadow: inset -4px -4px 0 #68400B, inset 4px 4px 0 #FAB89B;
}
/* Hide both the default dots and question mark svg on checked */
.mario-block input:checked + label .dot,
.mario-block input:checked + label .question-mark {
display: none;
}
/* Shared pseudo element styling */
.mario-block input:checked + label:before,
.mario-block input:checked + label:after {
content: '';
height: 20px;
position: absolute;
transform: rotate(45deg);
width: 20px;
}
/* Right dash */
.mario-block input:checked + label:before {
border-right: 4px solid #070000;
right: 18px;
top: 15px;
transform: rotate(45deg);
}
/* Left dash */
.mario-block input:checked + label:after {
border-left: 4px solid #070000;
left: 18px;
top: 15px;
transform: rotate(-45deg);
}
That's it!
## Taking it further
As always, you can take this concept and flesh it out even further. I was trying to mimic the "pixel" style of the original Mario games, but you could make the lighting and depth more realistic with some extra subtle gradients or `filter` properties.
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