* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    /* background: #008; */
    font-family: sans-serif;
    font-size: 24px;
    text-align: center;
}

.container {
    width: 80%;
    margin: auto;
    background: #fff;
}

header, footer {
  min-height: 120px;
}

header {
    background: #e8e;
}

footer {
    background: #a8a;
}


aside { 
    /* background: #8ee; */
    width: 100%;
}

section {
    /* background: #ee8; */
    width: 100%;
    padding: 0 20px;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

@media screen and (min-width: 480px) {
    main {
        flex-direction: row;
        align-items: stretch;
    }
    aside {
        width: 200px;
        margin-right: 2px;
    }
}

@media screen and (min-width: 768px) {
    main {
        flex-direction: row;
        align-items: stretch;
    }
    aside {
        width: 200px;
        margin-right: 2px;
    }
    .error {
        width: 650px;
    }
}