:root {
    --bg: #0b0b0c;
    --page: #121214;
    --ink: #f2f2f3;
    --muted: #a7a7ad;
    --rule: #2a2a2f;
    --accent: #d9d9de;
    --marker: #e878d0;
    --em: hsl(165, 100%, 60%);
    --em-muted: hsl(165, 65%, 55%);
    --accent: hsl(195, 100%, 70%);
    --design-w: 420px;
    --pad: 24px;
}

* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
}

body {
    margin: 0;
    padding: var(--pad);
    background: var(--bg);
    color: var(--ink);
    font-family:
        ui-sans-serif,
        system-ui,
        -apple-system,
        Segoe UI,
        Roboto,
        Helvetica,
        Arial,
        'Apple Color Emoji',
        'Segoe UI Emoji';
    line-height: 1.45;
    hyphens: auto;
    overflow-wrap: break-word;
}

.viewport {
    display: flex;
    justify-content: center;
    padding: 0;
    background: var(--bg);
}

.page {
    width: var(--design-w);
}

.frame {
    width: var(--design-w);
    border: 2px solid var(--rule);
    border-radius: 18px;
    background: var(--page);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    overflow: hidden;
    margin: 0 auto;
}

/* scale down on narrow viewports (ANDROID: prefer zoom) */
@media (max-width: 468px) {
    .frame {
        transform-origin: top center;
        transform: scale(calc((100vw - (2 * var(--pad))) / var(--design-w)));
    }
}
@supports (zoom: 1) {
    @media (max-width: 468px) {
        .frame {
            transform: none;
            zoom: calc((100vw - (2 * var(--pad))) / var(--design-w));
        }
    }
}

header {
    padding: 18px 18px 24px 18px;
    border-bottom: 1px solid var(--rule);
}

.masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    width: 44px;
    height: 44px;
    opacity: 0.9;
    transform: translateY(4px);
}

.kicker {
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
}

h1 {
    margin: 8px 0 0 0;
    font-size: 22px;
    font-weight: 650;
    letter-spacing: -0.01em;
}

main {
    padding: 8px 18px 24px 18px;
}

.em-bull::before {
    content: '•';
    color: var(--em);
    display: inline-block;
    margin: 0 0.08em;
    font-family:
        'Segoe UI Symbol', 'Apple Symbols', 'Noto Sans Symbols', sans-serif;
    font-size: 1em;
    font-weight: 700;
    position: relative;
    top: 0;
    line-height: 1;
}

.em-arrow::before {
    content: '→';
    color: var(--em);
    font-family:
        'Segoe UI Symbol', 'Apple Symbols', 'Noto Sans Symbols',
        'Arial Unicode MS', sans-serif;
    font-weight: 700;
    display: inline-block;
    transform: translateY(-0.1em);
}

.group {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--em);
}

.group:first-child {
    margin-top: 0;
    padding-top: 10px;
    border-top: none;
}

.group-title {
    display: block;
    text-align: right;
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin: 0 0 20px 0;
}

.item {
    padding: 3px 0;
    margin-top: 14px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

h2 {
    margin: 0;
    font-size: 18px;
    font-weight: 650;
    letter-spacing: -0.01em;
}

.hint {
    margin: 12px 0 0 0;
    font-size: 12px;
    color: var(--muted);
}

.code-shot {
    display: block;
    width: 100%;
    height: auto;
    padding-top: 6px;
}

figure.code {
    margin: 18px 0 6px 0;
}

figure.code figcaption {
    margin: 6px 0 0 0;
    font-size: 12px;
    color: var(--muted);
}

.gallery-caption {
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 0.6em;
    text-align: center;
}

.repo-link {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--em-muted);
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
    transition: border-color 0.15s ease;
}

.repo-link:hover {
    border-bottom-color: var(--muted);
}

code.cmd-cd {
    color: red;
}
code.cmd-ck {
    color: #c586c0;
}
code.cmd-cs {
    color: #cd6f1c;
}

.closing {
    text-align: center;
    font-size: 1.35em;
    font-weight: 700;
    color: var(--em);
    margin-top: 16px;
    letter-spacing: 0.02em;
}

.article-meta {
    margin-top: 12px;
    text-align: right;
    font-size: 7px;
    line-height: 1;
    letter-spacing: 0.08em;
    color: var(--muted);
    opacity: 0.6;
}

.step-bull {
    color: var(--accent);
    font-size: 1.05em;
    font-weight: 700;
    margin-right: 6px;
}

.marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.3em;
    height: 1.3em;
    border-radius: 50%;
    background: var(--marker);
    color: #161218;
    font-size: 0.78em;
    font-weight: 750;
    line-height: 1;
    vertical-align: 0.08em;
}

.marker-item {
    display: grid;
    grid-template-columns: 1.3em 1fr;
    column-gap: 0.55em;
    align-items: start;
    margin: 0 0 14px 0;
}

.marker-item .marker {
    margin-right: 0;
    margin-top: 0.16em;
}