:root{--bg:#fbfaf6;--fg:#222;--muted:#6b6b63;--line:#e4e1d6;--accent:#4a5a3a;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#1a1c17;--fg:#e8e6dc;--muted:#9a998c;--line:#33362e;--accent:#a9bd8c;--card:#22251f}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.85 "Hiragino Sans","Yu Gothic UI","Noto Sans JP",system-ui,sans-serif}
a{color:var(--accent)}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);padding:18px 0}
header.site a{color:var(--fg);text-decoration:none;font-weight:700;letter-spacing:.04em}
main{padding:36px 0 72px}
h1{font-size:1.7rem;line-height:1.4;margin:0 0 .4em}
h2{font-size:1.4rem;margin:2.2em 0 .6em;padding-bottom:.3em;border-bottom:1px solid var(--line)}
h3{font-size:1.15rem;margin:1.8em 0 .5em}
.meta{color:var(--muted);font-size:.9rem;margin-bottom:1.6em}
img{max-width:100%;height:auto;border-radius:6px}
.article img{display:block;margin:1.4em auto}
.article iframe{display:block;width:100%;aspect-ratio:16/9;height:auto;border:0;border-radius:6px;margin:1.2em 0}
.article table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.95rem;display:block;overflow-x:auto}
.article th,.article td{border:1px solid var(--line);padding:.5em .8em;text-align:left;vertical-align:top}
.article th{background:var(--card)}
.cards{display:grid;gap:22px}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;text-decoration:none;color:inherit}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;display:block}
.card .txt{padding:16px 20px 20px}
.card h2{font-size:1.15rem;border:0;margin:.2em 0 .4em;padding:0;line-height:1.5}
.card p{margin:0;color:var(--muted);font-size:.92rem;line-height:1.7}
footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.85rem}