*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
    background: none;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f3f3f3;
}

main {
    flex: 1 0 auto;
}

/* header */

header {
    padding: 10px 20px;
    color: #1a1a1a;
    border-bottom: 1px solid #1a1a1a;
}

header content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

#header-left {
    display: flex;
    align-items: center;
}

#header-left img {
    height: 50px;
    margin-right: 10px;
}

#header-right a {
    color: #1a1a1a;
    text-decoration: none;
    margin-left: 15px;
}

#header-right a:hover {
    text-decoration: underline;
}

/* footer */

footer {
    flex-shrink: 0;
    padding: 10px 20px;
    border-top: 1px solid #1a1a1a;
}

footer content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

footer a {
    display: block;
    text-decoration: none;    
    height: 21px;
    width: 21px;
}