* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
/* Class Selectors */
.box{
    margin: 1rem;
    border: 1px solid rgb(0 0 0 / 10%);
    padding: 1rem;
    background-color: #ddd; 
    color: #000;
}

header, footer {
    max-width: 840px;
    margin: 0 auto;
}

h1 {
    background-color: var(--heading-background-color);
    color: var(--heading-text-color);
    font-family: var(--heading-font);
    padding: 10px; 
    border-bottom: #000000;   
}

nav {
    background-color: #abe;
    padding: 1rem;
    display: flex;
    justify-content: space-evenly;
    align-items: center; 
}

nav a {
    color: white;
    display: block;
    padding: 0.5rem;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 700;
}

h1 {
    color: rgb(0, 0, 0);
    border-bottom: #a9a6a6;

}

aside {
    width: 20rem;
    margin: 1rem;
    border: 1px solid rgba(0, 0, 0, 0.2); /* 1️⃣ This is a light border color */
    padding: 1rem;
    background-color: #eee;
    color: #333;
    text-align: center; 
}

aside img {
    width: 200px;
    height: auto;
}

main img {
    width: 150px;
    height: auto;
    border: 1px solid #abe;
    padding: 2px;
    box-shadow: 0 0 3px #333;
    float: right;
}

p { padding: 0;}

header, .grid, footer {
    max-width: 840px;
    margin: 1rem;

}
.grid {
    display: grid;
    align-items: center;
}

main {
    grid-template-columns: auto;
    margin: 1rem;

}

aside {
    width: 20rem;
    position: relative;
    grid-column: 1/2;
    grid-row: 1/2;
}

footer {
    margin-top: 15px;
    border-top: 1px solid #000;
    padding: 10px;
    text-align: center;
}