:root{--bg:#f7f8fa;--surface:#fff;--text:#1c2430;--muted:#5b6676;--border:#dde2e9;--accent:#1f6feb;--accent-strong:#1554b8;--accent-soft:#e8f0fe;--ok:#1a7f37;--warn-bg:#fff8e6;--warn-border:#f0c36d;--radius:10px;--max:960px;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#0f1419;--surface:#171d24;--text:#e6e9ee;--muted:#a0a9b6;--border:#2c3540;--accent:#6ea8fe;--accent-strong:#9ec5fe;--accent-soft:#1c2b42;--ok:#56d364;--warn-bg:#2b2414;--warn-border:#8a6d2c;color-scheme:dark}}*,:before,:after{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Meiryo,sans-serif;font-size:16px;line-height:1.75}a{color:var(--accent)}a:hover{color:var(--accent-strong)}h1,h2,h3{margin:1.6em 0 .6em;line-height:1.4}h1{margin-top:.4em;font-size:1.6rem}h2{border-bottom:2px solid var(--border);padding-bottom:.3em;font-size:1.3rem}h3{font-size:1.1rem}.container{max-width:var(--max);margin:0 auto;padding:0 16px}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.site-header .container{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:4px 16px;padding-top:10px;padding-bottom:10px;display:flex}.site-title{color:var(--text);font-size:1.1rem;font-weight:700;text-decoration:none}.site-nav{flex-wrap:wrap;gap:4px 16px;font-size:.92rem;display:flex}.site-nav a{text-decoration:none}main{padding:16px 0 48px}.site-footer{background:var(--surface);border-top:1px solid var(--border);color:var(--muted);padding:24px 0;font-size:.88rem}.site-footer nav{flex-wrap:wrap;gap:4px 16px;margin-bottom:8px;display:flex}.breadcrumb{color:var(--muted);flex-wrap:wrap;margin:0 0 8px;padding:0;font-size:.85rem;list-style:none;display:flex}.breadcrumb li+li:before{content:"›";margin:0 6px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin:16px 0;padding:16px}.lead{color:var(--muted)}.note{color:var(--muted);font-size:.88rem}blockquote{border-left:4px solid var(--border);color:var(--muted);margin:12px 0;padding:8px 14px}.notice{background:var(--warn-bg);border:1px solid var(--warn-border);border-radius:var(--radius);margin:12px 0;padding:10px 14px;font-size:.92rem}.badge{vertical-align:middle;border-radius:999px;padding:1px 8px;font-size:.75rem;font-weight:700;display:inline-block}.badge-ok{background:color-mix(in srgb, var(--ok) 15%, transparent);color:var(--ok)}.badge-draft{background:var(--warn-bg);color:var(--text);border:1px solid var(--warn-border)}.table-wrap{-webkit-overflow-scrolling:touch;margin:12px 0;overflow-x:auto}table{border-collapse:collapse;background:var(--surface);width:100%;font-size:.92rem}th,td{border:1px solid var(--border);text-align:right;white-space:nowrap;padding:6px 10px}th{background:var(--accent-soft);font-weight:600}th:first-child,td.left{text-align:left}caption{text-align:left;color:var(--muted);caption-side:bottom;padding:4px 0;font-size:.85rem}.city-list{columns:3 10em;column-gap:16px;padding-left:1.2em}.btn{border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer;border-radius:8px;padding:8px 16px;font-size:1rem;text-decoration:none;display:inline-block}.btn:hover{background:var(--accent-strong);color:#fff}.btn-ghost{color:var(--accent);background:0 0}.btn-ghost:hover{background:var(--accent-soft);color:var(--accent-strong)}input,select{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:6px 8px}input:focus-visible,select:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.ad-slot{min-height:100px;margin:24px 0}.unit-wrap{align-items:center;gap:4px;display:flex}.unit-wrap input{text-align:right;width:100%;min-width:0}.unit-wrap span{color:var(--muted);white-space:nowrap;font-size:.85rem}.sticky-first th:first-child,.sticky-first td:first-child{z-index:1;position:sticky;left:0}.sticky-first td:first-child{background:var(--surface)}.formula{background:var(--accent-soft);overflow-wrap:anywhere;border-radius:4px;padding:8px 12px}