After adding a position: fixed; to my header everything was in front of my header because they were using a position: absolute or position: relative I deleted them, and problem solved but now I want to change the position of price since I can not use a relative or absolute position because of this:

in this image price uses a relative position and header uses a fixed position but price is infront of the header so i decided to delete the position from price:

How can I change the position of price in the following code? For example I want to put it in bottom right without setting a position: absolute or position: relative.
Or if there is a better solution that can help me to put my content behind the fixed header without deleting the position property of contents what is it?
.header {
width: 100%;
height: 200px;
position: fixed;
background-color: darkcyan;
top: 0;
left: 0;
right: 0;
margin-top: 0;
margin-right: 0;
}
body {
margin-top: 333px;
display: grid;
grid-template-rows: auto 1fr auto;
min-height: 100vh;
margin-right: 0;
margin-left: 0;
margin-bottom: 0;
}
.footer {
background: darkslateblue;
margin-top: 100px;
height: 100px;
margin-right: 0px;
width: 100%;
}
.card {
max-width: 400px;
margin: auto;
text-align: center;
font-family: arial;
border-style: solid;
border-width: 6px;
}
.grid {
display: grid;
grid-template-columns: 1fr 1fr 1fr 1fr;
grid-gap: 1em;
}
.card img {
height: 400px;
width: 400px;
vertical-align: middle;
}
.price {
background-color: #f44336;
font-size: 22px;
border-radius: 3px;
width: 131px;
padding: 5px;
}
.card button {
border: none;
color: white;
background-color: #000;
cursor: pointer;
width: 100%;
height: 100px;
font-size: 44px;
align-items: center;
}
.card button:hover {
opacity: .5;
background-color: #330;
}
#id {
background-color: saddlebrown;
color: white;
margin: 0;
font-size: 30px;
height: 310px;
}
.number {
width: 50px;
height: 50px;
background-color: #330;
color: yellow;
border-radius: 50%;
position: absolute;
top: -22px;
right: -22px;
justify-content: center;
align-items: center;
display: flex;
font-size: 22px;
}
@media (max-width: 1864px) {
.card {
max-width: 300px;
}
.price {
font-size: 20px;
}
.card img {
height: 300px;
width: 300px;
}
}
@media (max-width: 1319px) {
.grid {
grid-template-columns: 1fr 1fr 1fr;
}
}
<head>
<!-- <link rel="stylesheet" href="{% static 'main.css' %}"> -->
<div class="header">
<h1>header</h1>
</div>
</head>
<body style="background-color: #36454F;">
<div class="grid">
<!-- {% for i in p%} -->
<div class='card'>
<div class="number">{{i.Number}}</div>
<img src="{{i.image}}"></img>
<p id="id">{{i.description}}</p>
<a href="{{i.buy}}" target='_blank' rel='noopener noreferrer'>
<button><span class="price"> ${{i.price}}</span> buy</button>
</a>
</div>
<!-- {%endfor%} -->
</div>
<div class="footer">
<h1>hello</h1>
</div>
</body>