:root{--bg:#fff;--fg:#1d2330;--muted:#5c6577;--brand:#004b93;--brand-fg:#fff;--card:#f3f6fa;--line:#d9e0ea}
@media (prefers-color-scheme:dark){:root{--bg:#10141c;--fg:#e6eaf2;--muted:#9aa5b8;--brand:#6aa8ee;--brand-fg:#10141c;--card:#1a212e;--line:#2b3446}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
.wrap{max-width:60rem;margin:0 auto;padding:0 16px}
a{color:var(--brand)}
.site-header{border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;padding-top:12px;padding-bottom:12px}
.brand img{display:block;height:48px;width:auto}
nav{display:flex;flex-wrap:wrap;gap:4px 18px;flex:1}
nav a{text-decoration:none;color:var(--fg);padding:4px 0;border-bottom:2px solid transparent}
nav a[aria-current]{border-color:var(--brand)}
.lang-toggle{font:inherit;font-size:.85rem;background:none;color:var(--fg);border:1px solid var(--line);border-radius:6px;padding:4px 10px;cursor:pointer}
.lang-toggle[hidden]{display:none}
html[data-lang=en] [lang=cy],html[data-lang=cy] [lang=en]{display:none}
main{padding-top:24px;padding-bottom:48px}
h1{font-size:2rem;line-height:1.2;margin:.2em 0 .4em}
.meta,.cd{color:var(--muted);font-size:.9rem}
.hero{max-width:100%;height:auto;border-radius:8px;margin:0 0 1em}
main img{max-width:100%;height:auto}
.notice{background:var(--card);border-left:4px solid var(--brand);padding:8px 20px;border-radius:6px;margin:1em 0 2em}
.notice p{margin:.6em 0}
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px}
.card a{display:block;height:100%;background:var(--card);border-radius:8px;overflow:hidden;text-decoration:none;color:var(--fg);border:1px solid var(--line)}
.card img,.card .noimg{display:block;width:100%;aspect-ratio:3/2;object-fit:cover;background:var(--line)}
.ct{display:block;font-weight:600;line-height:1.3;padding:10px 12px 2px}
.cd{display:block;padding:0 12px 10px}
.tags{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.tags a{display:inline-block;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:2px 14px;text-decoration:none}
.btn{display:inline-block;background:var(--brand);color:var(--brand-fg);padding:8px 18px;border-radius:6px;text-decoration:none;font-weight:600}
.btn.alt{background:none;color:var(--brand);border:1px solid var(--brand)}
audio,iframe{max-width:100%;display:block;margin:1em 0}
audio{width:100%}
.note{color:var(--muted);font-style:italic}
.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;padding:16px 0 32px}