:root {
    color-scheme: dark;
    --bg: #0a1626;
    --panel: #10203a;
    --ink: #e8f1fb;
    --muted: #9fb6cf;
    --accent: #7fc4ff;
    --rule: rgba(160, 200, 240, 0.22);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background:
        radial-gradient(ellipse 70% 50% at 50% -10%, rgba(60, 120, 200, 0.28), transparent 70%),
        var(--bg);
    color: var(--ink);
    font-family: "Segoe UI", -apple-system, Roboto, sans-serif;
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

main {
    max-width: 760px;
    margin: 0 auto;
    padding: 32px 22px 96px;
}

a { color: var(--accent); }

.back {
    display: inline-block;
    margin: 8px 0 24px;
    font-size: 14px;
    text-decoration: none;
}

.back:hover { text-decoration: underline; }

h1 {
    font-size: clamp(30px, 5vw, 42px);
    font-weight: 300;
    line-height: 1.15;
    margin: 12px 0 10px;
}

h2 {
    font-size: 22px;
    font-weight: 400;
    color: var(--accent);
    margin: 40px 0 10px;
    padding-top: 18px;
    border-top: 1px solid var(--rule);
}

p { margin: 0 0 16px; }

.subtitle {
    color: var(--muted);
    font-size: 16px;
    margin-bottom: 28px;
}

code {
    font-family: Consolas, "SF Mono", Menlo, monospace;
    font-size: 0.88em;
    background: rgba(10, 22, 40, 0.9);
    border: 1px solid var(--rule);
    border-radius: 3px;
    padding: 1px 5px;
}

pre {
    background: #060e1c;
    border: 1px solid var(--rule);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
    padding: 14px 16px;
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.5;
}

pre code {
    background: none;
    border: 0;
    padding: 0;
    font-size: inherit;
}

/* Diff markers in the fix snippet. */
pre del,
pre ins {
    display: block;
    text-decoration: none;
    margin: 0 -16px;
    padding: 0 16px;
}

pre del { background: rgba(190, 60, 70, 0.22); color: #ffb3bb; }
pre ins { background: rgba(60, 170, 110, 0.20); color: #a8f0c8; }

@media (max-width: 620px) {
    body { font-size: 16px; }
    main { padding: 20px 16px 64px; }
}