:root {
    --bg: #212121;
    --app-bar: #2e2e2e;
    --surface: #303030;
    --border: rgba(255, 255, 255, .12);
    --text: #fff;
    --text-muted: rgba(255, 255, 255, .6);
    --primary: #d9472b;
    --bar-height: 64px;
    --logo-height: 15px;
    --content-width: 960px;
}

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

html,
body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Lato, Roboto, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    letter-spacing: .009em;
    -webkit-font-smoothing: antialiased;
}

.app-bar {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 10;
    height: var(--bar-height);
    background: var(--app-bar);
    border-bottom: 1px solid var(--border);
    box-shadow:
            0 2px 4px -1px rgba(0, 0, 0, .2),
            0 4px 5px rgba(0, 0, 0, .14),
            0 1px 10px rgba(0, 0, 0, .12);
}

.app-bar-inner {
    width: 100%;
    height: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
}

.logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    display: block;
    width: auto;
    height: var(--logo-height);
}

.logo-text {
    color: var(--primary);
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
}

main {
    min-height: 100vh;
    padding: calc(var(--bar-height) + 40px) 24px 40px;
}

.card {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 28px 32px 32px;
    background: var(--surface);
    border-radius: 4px;
    box-shadow:
            0 3px 1px -2px rgba(0, 0, 0, .2),
            0 2px 2px rgba(0, 0, 0, .14),
            0 1px 5px rgba(0, 0, 0, .12);
}

.card-header {
    margin-bottom: 20px;
}

.card h1 {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}

.meta {
    margin-top: 6px;
    color: var(--text-muted);
    font-size: 15px;
}

.content p {
    margin: 0 0 1.1em;
}

.content p:last-child {
    margin-bottom: 0;
}

.content strong {
    font-weight: 700;
}

.content a {
    color: var(--primary);
    text-decoration: none;
}

.content a:hover {
    text-decoration: underline;
}

.muted {
    color: var(--text-muted);
}

code {
    padding: 2px 6px;
    background: rgba(255, 255, 255, .08);
    border-radius: 3px;
}
.content-title {
    margin: 0 0 24px;
    font-size: 24px;
    font-weight: 700;
    line-height: 1.3;
}

.content-subtitle {
    margin: 32px 0 14px;
    font-size: 20px;
    font-weight: 700;
    line-height: 1.3;
}

.content-divider {
    width: 100%;
    height: 1px;
    margin: 40px 0;
    border: 0;
    background: var(--border);
}
@media (max-width: 600px) {
    .app-bar-inner {
        padding: 0 16px;
    }

    main {
        padding: calc(var(--bar-height) + 24px) 12px 24px;
    }

    .card {
        padding: 20px;
    }

    .card h1 {
        font-size: 21px;
    }
}