*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background: #fff;
    -webkit-text-size-adjust: 100%;
}

.mainContent {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 16px 40px;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 0 0 1rem;
}

h1 {
    font-size: 1.5rem;
    margin: 0;
}

.wakelock-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: #aaa;
    flex-shrink: 0;
}

.wakelock-btn:hover {
    color: #888;
}

.wakelock-btn.active {
    color: #e6a817;
}

.wakelock-btn.active:hover {
    color: #c89010;
}

h1 a {
    color: inherit;
    text-decoration: none;
}

h1 a:hover {
    text-decoration: underline;
}

h2 {
    font-size: 1.5rem;
    margin: 1.5rem 0 0.75rem;
}

h3 {
    font-size: 1.2rem;
    margin: 1.5rem 0 0.5rem;
}

h4 small {
    display: block;
    font-size: 60%;
    color: #888;
}

a {
    color: #0066cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
    color: #004499;
}

ul, ol {
    padding-left: 1.5em;
}

li {
    margin-bottom: 0.1em;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1rem 0;
}

p {
    margin: 0 0 1rem;
}

footer {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px 16px;
    border-top: 1px dashed #aaa;
}

@media (min-width: 600px) {
    body {
        font-size: 18px;
    }

    .mainContent {
        padding: 40px 24px 60px;
    }

    footer {
        padding: 30px 24px;
    }
}