/* Blog HARS: static pages, no JavaScript, no external fonts. Accent = MUI default blue, background = app background. */
:root {
    --accent: #1976d2;
    --accent-dark: #115293;
    --text: #1f2933;
    --muted: #52606d;
    --page: #f0f2f5;
    --card: #ffffff;
    --border: #d9dee4;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--page);
    color: var(--text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1.0625rem;
    line-height: 1.65;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }

a { color: var(--accent-dark); }
a:hover { color: var(--accent); }
a:focus-visible, .skip-link:focus { outline: 3px solid var(--accent); outline-offset: 2px; }

.skip-link { position: absolute; left: -9999px; top: 8px; background: var(--card); padding: 8px 12px; z-index: 10; }
.skip-link:focus { left: 8px; }

.site-header { background: var(--card); border-bottom: 1px solid var(--border); }
.header-row { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 600; }
.brand img { display: block; height: 36px; width: auto; }
.signin { font-weight: 600; text-decoration: none; border: 1px solid var(--accent); border-radius: 4px; padding: 6px 14px; color: var(--accent-dark); }
.signin:hover { background: var(--accent); color: #fff; }

main { padding-top: 32px; padding-bottom: 48px; }

h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 2rem; margin: 0 0 12px; }
h2 { font-size: 1.5rem; margin: 40px 0 12px; }
h3 { font-size: 1.2rem; margin: 28px 0 8px; }

img { max-width: 100%; height: auto; }
.post-body img { display: block; margin: 16px 0; border: 1px solid var(--border); border-radius: 6px; background: var(--card); }

.post-meta, .post-card time { color: var(--muted); font-size: 0.95rem; margin: 0 0 8px; }
.lead { font-size: 1.2rem; color: var(--muted); }
.tags { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { background: #e3f2fd; color: #0d47a1; border-radius: 16px; padding: 2px 12px; font-size: 0.9rem; }

.post-body code { background: #e8eaed; border-radius: 4px; padding: 1px 5px; font-size: 0.95em; }
.post-body pre { background: #1f2933; color: #f5f7fa; padding: 16px; border-radius: 6px; overflow-x: auto; }
.post-body pre code { background: none; padding: 0; }
.post-body blockquote { margin: 16px 0; padding: 8px 16px; border-left: 4px solid var(--accent); background: var(--card); }
.post-body table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
.post-body th, .post-body td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }

.post-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 20px; }
.post-card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.post-card img { display: block; width: 100%; aspect-ratio: 1200 / 630; object-fit: cover; border-bottom: 1px solid var(--border); }
.post-card .card-body { padding: 16px 20px 20px; }
.post-card h2 { margin: 4px 0 8px; font-size: 1.35rem; }
.post-card p { margin: 0; }

.back { margin-top: 40px; }

.site-footer { border-top: 1px solid var(--border); background: var(--card); color: var(--muted); font-size: 0.95rem; }
.site-footer p { margin: 0; padding: 20px 0; }