* {
    box-sizing: border-box;
}

html {
    font-family: "Ubuntu Sans", Arial, sans-serif;
}

body {
    margin: 0;
    background: #fff;
    color: #222;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    border-bottom: 1px solid #ccc;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.site-name {
    font-size: 1.5rem;
    font-weight: 700;
}

.site-nav {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #ccc;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.menu-button {
    width: 100%;
    padding: 0.8rem 1rem;
    font: inherit;
    font-size: 1.1rem;
    cursor: pointer;
}

.menu-links {
    display: none;
    margin-top: 0.5rem;
}

.menu-links.open {
    display: block;
}

.menu-links a {
    display: block;
    padding: 0.9rem 1rem;
    border-bottom: 1px solid #ddd;
    color: #222;
    text-decoration: none;
}

.menu-links a:hover {
    background: #eee;
}

.menu-button {
    width: 100%;
    padding: .8rem 1rem;
    font: inherit;
    font-size: 1.1rem;
}

main {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

main h1 {
    margin-top: 0;
    font-size: 1.75rem;
}

footer {
    text-align: center;
    border-top: 1px solid #ccc;
    font-size: .9rem;
    width: 100%;
    max-width: 1200px;
    margin: auto auto;
    padding: 1rem;
}

@media (min-width: 768px) {

    .menu-button {
        display: none;
    }

    .site-nav {
        padding: 0 1rem;
    }

    .menu-links {
        display: flex;
        margin: 0;
    }

    .menu-links a {
        border-bottom: 0;
        padding: 0.9rem 1.25rem;
    }
}