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

.container {
    width: 960px;
    margin: 0 auto;
}

header {
    padding: 3rem;
    background: #333;
    text-align: center;
}
header h1 {
    color: #fff;
    font-size: 3rem;
}

.content {
    padding: 2rem;
}

.content__grid {
    display: grid;
    grid-template-columns: 300px 1fr;
}

.sidebar {
    text-align: center;
    padding: 2rem;
    border: 2px solid #e4e4e4;
}

.showinfo {
    padding: 2rem;
    border: 2px solid #e4e4e4;
}