:root{--bg:#f7faf8;--fg:#14211b;--mut:#5b6b63;--card:#fff;--line:#d9e3dd;--acc:#0f8f6a}
@media(prefers-color-scheme:dark){:root{--bg:#0f1713;--fg:#e6f0ea;--mut:#9bb0a5;--card:#17231d;--line:#2a3b32;--acc:#4cc9a0}}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,sans-serif}
main{max-width:760px;margin:0 auto;padding:16px}nav{display:flex;flex-wrap:wrap;gap:12px;align-items:center;padding:8px 0}nav .sp{flex:1}
a{color:var(--acc)}h1{font-size:1.6rem}h2{font-size:1.15rem;margin-top:1.6em}.mut{color:var(--mut);font-size:14px}
table{width:100%;border-collapse:collapse;font-size:14px}td,th{border:1px solid var(--line);padding:6px;text-align:left;vertical-align:top}
input,textarea,button{font:inherit;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--fg);width:100%;box-sizing:border-box;margin:4px 0 12px}
button{background:var(--acc);color:#fff;border:0;width:auto;cursor:pointer}.hp{position:absolute;left:-9999px}
footer{margin-top:40px;border-top:1px solid var(--line);padding-top:12px}