CSS Grid dynamic columns auto-fit - gap between columns - html

Question

I am trying youtube.com adaptive grid layout. I could achieve using CSS Grid. But if total number of cards are very less for example 2, card's width increasing to fit entire row. I could avoid this by setting max-width or width, but, gap betwwen cards changing when i change width of browser window.
How to set max-width without increasing the between cardds?
.grid-layout {
padding: 0;
margin: 0;
list-style: none;
border: 1px solid silver;
display: grid;
grid-template-columns: repeat(auto-fit, minmax(5rem, 1fr) );
}
.card {
background: grey;
height: 4rem;
/* Uncommenting below line sets width but gap between card too high*/
/* max-width: 7rem; */
padding: 1px;
margin: 0.5rem;
line-height: 4rem;
color: white;
font-weight: bold;
font-size: 2rem;
text-align: center;
}
<section class="grid-layout">
<div class="card">0</div>
<div class="card">1</div>
<!-- <div class="card">2</div>
<div class="card">3</div>
<div class="card">4</div>
<div class="card">5</div>
<div class="card">6</div>
<div class="card">7</div>
<div class="card">8</div>
<div class="card">9</div>
<div class="card">10</div>
<div class="card">11</div>
<div class="card">12</div>
<div class="card">13</div>
<div class="card">14</div>
<div class="card">15</div>
<div class="card">16</div>
<div class="card">17</div>
<div class="card">18</div>
<div class="card">19</div> -->
</section>

Answer 1

Use grid-gap with a value of percentage:
.grid-layout {
list-style: none;
border: 1px solid silver;
display: grid;
grid-gap: 20%;
grid-template-columns: 1fr 1fr;
}
.card {
background: grey;
height: 8rem;
padding: 1px;
line-height: 8rem;
color: white;
font-weight: bold;
font-size: 2rem;
text-align: center;
}
<section class="grid-layout">
<div class="card">0</div>
<div class="card">1</div>
<!-- <div class="card">2</div>
<div class="card">3</div>
<div class="card">4</div>
<div class="card">5</div>
<div class="card">6</div>
<div class="card">7</div>
<div class="card">8</div>
<div class="card">9</div>
<div class="card">10</div>
<div class="card">11</div>
<div class="card">12</div>
<div class="card">13</div>
<div class="card">14</div>
<div class="card">15</div>
<div class="card">16</div>
<div class="card">17</div>
<div class="card">18</div>
<div class="card">19</div> -->
</section>
Is this what you want?

Answer 2

auto-fill works as per my expectations instead of auto-fit when columns doesn't wrap.
.grid-layout {
padding: 0;
margin: 0;
list-style: none;
border: 1px solid silver;
display: grid;
grid-template-columns: repeat(auto-fill, minmax(5rem, 1fr) );
}
.card {
background: grey;
height: 4rem;
max-width: 7rem;
padding: 1px;
margin: 0.5rem;
line-height: 4rem;
color: white;
font-weight: bold;
font-size: 2rem;
text-align: center;
}
<section class="grid-layout">
<div class="card">0</div>
<div class="card">1</div>
<!-- <div class="card">2</div>
<div class="card">3</div>
<div class="card">4</div>
<div class="card">5</div>
<div class="card">6</div>
<div class="card">7</div>
<div class="card">8</div>
<div class="card">9</div>
<div class="card">10</div>
<div class="card">11</div>
<div class="card">12</div>
<div class="card">13</div>
<div class="card">14</div>
<div class="card">15</div>
<div class="card">16</div>
<div class="card">17</div>
<div class="card">18</div>
<div class="card">19</div> -->
</section>