How to adjust the elements responsively for different widths and heights - html

Question

Below is the screenshot that contains OK text as an element and 2 other elements in the left & right side and in the last buttons.
.center-text {
font-weight: bold;
font-style: normal;
text-align: center;
font-size: 25px;
line-height: 30px;
letter-spacing: normal;
opacity: 1.0;
margin-top: 25% !important;
}
.lower-content {
margin-bottom: 30px;
}
.group:before, .group:after {
content: "";
display: table;
}
.group:after {
clear: both;
}
.group {
clear: both;
*zoom: 1;
}
.lower-content-left {
float: left;
margin: 0 1.5%;
width: 63%;
}
.lower-content-right {
float: right;
margin: 0 1.5%;
width: 30%;
}
.button-left {
position: absolute;
width: 140px;
height: 140px;
left: 100px !important;
right: 0;
bottom: 0;
top: 620px;
}
.button-left>div {
width: 100px;
height: 100px;
}
.notification-button {
margin-left: 15px;
margin-top: 10px;
zoom: 2.0;
}
.button-right {
position: absolute;
width: 140px;
height: 140px;
left: 250px;
right: 20px;
bottom: 0;
top: 620px;
}
.button-right>div {
width: 100px;
height: 100px;
}
.heart-button {
margin-left: 15px;
margin-top: 10px;
zoom: 2.0;
}
<div class="center-text">Ok</div>
<div class="group">
<div class="lower-content-left">
<div class="lower-left">click here</div>
<div class="search-channels">Click
<br>Here</div>
</div>
<div class="lower-content-right">
<div class="lower-right">Otherwise Click here</div>
<div class="qrCode">Click here
<br>Also</div>
</div>
<div class="button-left">
<div>
<ion-icon name="notification" class="notification-button"></ion-icon>
</div>
</div>
<div class="button-right">
<div>
<ion-icon name="heart" class="heart-button"></ion-icon>
</div>
</div>
Problem : When I change the width of the screen the buttons hide away or is not present at the present position and same for all elements.
I have posted in the screenshot.I just need to edit my css to make it responsive according to the screenshot.

Answer 1

Try to use to css by resolution.
Example:
#media (max-width: 300px) {
.your-class {
your:option; }
}
#media (max-width: 600px) {
.your-class {
your:option; }
}