* {
    box-sizing: border-box;
    overflow: auto;
}

html {
    font-size: 12px;
}

body {
    margin: 0;
    font-family: 'Courier New', Courier, monospace;
}

.container {
    width: clamp(576px, 70vw, 1200px);
    margin: 0 auto;
}

header, main, footer {
    padding: 1rem;
    margin: 1rem;
}

.container, header, .all-pictures {
    display: flex;
}

.container {
    flex-direction: column;
    min-height: 100vh;
    justify-content: flex-end;
}
main {
    flex-grow: 1;
}

header > a{
    margin: 10px;
}

header > a:first-child {
    font-size: 28px;
    font-weight: bold; 
    margin-right: auto;  
}

header {
    align-items: center;
}
footer {
    text-align: center;
    text-transform: uppercase;
    font-weight: bold;
}

footer a:first-child {
    font-size: 18px;
     
}

footer a {
    font-size: 12px;

}

.all-pictures {
    flex-direction: row;
    flex-wrap: wrap;
    
}
.picture {
    width: calc(100% / 4);
    padding: 10px;
    display: block;
    
  
}

.picture img {
    width: 100%;   
    border: 3px solid white;
    border-radius: 10px;
    box-shadow: 0px 0px 8px black;
}

a {
    text-decoration: none;
}

.arrow {
   width: auto;
   align-self: flex-end;
   margin-left: auto;
}

.arrow img {
    width: 225px;
    height: 225px;
}