absolute responsive image background - css

Question

I have a little question due to position of background image in my footer.
As You can see on the picture, my current background image (green dotted line with ball - it is svg image) is placed in the middle if the footer.
I would like to place it in the position of the red line, staying there while resizing window.
Code of it is:
footer{
position: relative;
/* START OF IMAGE BG */
&:before{
content: "";
position: absolute;
display: block;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: url("/wp-content/themes/company/static/img/line.svg");
-moz-background-size:90%;
background-size:90%;
background-repeat: no-repeat;
}
/* END OF IMG BG */
padding: rem-calc(45 20);
#media #{$medium-up}{
padding: rem-calc(85);
}
background-color: $bluedark;
color: $white;
min-height: rem-calc(500);
p{
font-size: rem-calc(12);
#media #{$medium-up}{
font-size: rem-calc(16);
}
font-weight: 300;
&.section-header{
text-transform: uppercase;
font-weight: 600;
}
&.bold{
font-weight: 600;
}
&.green{
color: $green;
}
}
.social-media{
img{
display: inline-block;
margin: rem-calc(0 5 20 5);
max-height: rem-calc(20);
#media #{$medium-up}{
max-height: rem-calc(40);
}
}
}
.underline{
margin-top: rem-calc(50);
border-top: 1px solid $bluegrey;
padding-top: rem-calc(20);
.logo{
float: left;
width: rem-calc(200);
height: rem-calc(45);
background: url("/wp-content/themes/company/static/img/logo_light.svg");
background-size: contain;
background-repeat: no-repeat;
}
select{
float: right;
}
}
}
And html is:
<footer>
<div class="line"></div>
<div class="flex">
<div class="row">
<div class="large-3 columns">
<p class="section-header">O nas</p>
<p>O Firmie</p>
<p>Zespół</p>
<p class="green">Blog</p>
</div>
<div class="large-3 columns">
<p class="section-header">Pomoc</p>
<p>FAQ</p>
<p>Regulamin</p>
<p>Polityka prywatności</p>
</div>
<div class="large-3 columns">
<p class="section-header">Social Media</p>
<div class="social-media">
<img src="{{site.theme.link}}/static/img/social-media/facebook.png">
<img src="{{site.theme.link}}/static/img/social-media/twitter.png">
<img src="{{site.theme.link}}/static/img/social-media/instagram.png">
</div>
</div>
<div class="large-3 columns">
<p class="section-header">Kontrakt</p>
<div class="button green">Formularz kontaktowy</div>
</div>
</div>
<div class="row underline">
<div class="logo"></div><span>
<select>
<option value="Polski">Polski</option>
<option value="English">English</option>
</select>
</div>
</div>
I know it is wrong placed due to top:0 however I dont know how to make it stay right on the top border of footer.
I would be grateful for any help.

Answer 1

A similar example of yours, I think its usefull for your purpouse:
div {
border: solid 1px green;
margin-bottom: 20px;
}
footer {
position: relative;
height: 50px;
background-color: red;
text-align: center;
padding-top: 20px;
}
footer:before {
content: "";
position: absolute;
display: block;
top: -50%;
left: 0;
width: 100%;
height: 100%;
background: url("http://www.curtainshopsouthport.co.uk/scissors.png");
-moz-background-size: 90%;
background-size: 90%;
background-repeat: no-repeat;
background-position: left 50%;
}
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Possimus voluptatem, soluta deserunt.</div>
<footer>footer</footer>

Answer 2

As long as you don't have overflow issues, all you should need to do is replace top:0 with bottom:100%
footer{
position: relative;
&:before{
content: "";
position: absolute;
display: block;
bottom: 100%; /* change here */
left: 0;
width: 100%;
height: 100%;
padding-bottom: 50%;
background: url("img/line.svg");
-moz-background-size:90%;
background-size:90%;
background-repeat: no-repeat;
}