:root{--paper:#f4ecd8;--paper2:#ebdfc0;--ink:#2e2a22;--ink2:#6d604a;--line:rgba(46,42,34,.2);--card:#fffaf0;--green:#2f7d5b;--gold:#b8862b;--accent:#2f7d5b;--shadow:0 2px 0 rgba(46,42,34,.12),0 6px 16px rgba(46,42,34,.1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font-family:"Zen Maru Gothic","Hiragino Maru Gothic ProN","Noto Sans JP",sans-serif;line-height:1.85;font-size:16.5px;
 background:var(--paper) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='260' height='260'><g fill='none' stroke='%23c9b98f' stroke-width='1' opacity='.55'><path d='M-10 60 Q60 20 130 60 T270 50'/><path d='M-10 90 Q60 50 130 90 T270 80'/><path d='M-10 190 Q70 150 140 190 T270 180'/><path d='M-10 220 Q70 180 140 220 T270 210'/></g></svg>")}
h1,h2,h3,.serif{font-family:"Shippori Mincho","Hiragino Mincho ProN",serif}
a{color:inherit}
.wrap{max-width:820px;margin:0 auto;padding:0 18px}
.top{padding:22px 0 8px;text-align:center}
.top .kick{letter-spacing:.3em;font-size:12px;color:var(--ink2)}
.top h1{margin:.1em 0;font-size:clamp(30px,6vw,46px);font-weight:800;letter-spacing:.08em}
.top h1 em{font-style:normal;color:var(--green)}
.top p{margin:.3em 0;color:var(--ink2)}
.stats{display:inline-flex;gap:10px;margin-top:8px;font-size:13px;background:var(--card);border:1px solid var(--line);border-radius:99px;padding:4px 14px;box-shadow:var(--shadow)}
.stats b{color:var(--green);font-size:17px}
.mapbox{border:3px solid var(--ink);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);margin:14px 0;position:relative;background:#cfe1ea}
#map{height:300px}
.mapbox.big{width:100vw;margin:14px calc(50% - 50vw);border-radius:0;border-left:0;border-right:0}
.mapbox.big #map{height:clamp(420px,70vh,760px)}
.legend{position:absolute;right:8px;bottom:8px;z-index:500;background:#fffaf0e0;border-radius:8px;padding:3px 9px;font-size:12px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.chip{font:inherit;font-size:14px;border:2px solid var(--ink);background:var(--card);border-radius:99px;padding:3px 13px;cursor:pointer;box-shadow:0 2px 0 var(--ink)}
.chip.on{background:var(--ink);color:#fff}
.chip:active{transform:translateY(2px);box-shadow:none}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:12px 0 40px}
.card{display:block;text-decoration:none;background:var(--card);border:2px solid var(--ink);border-radius:14px;overflow:hidden;box-shadow:0 4px 0 var(--ink);transition:.15s;position:relative}
.card:hover{transform:translateY(-3px);box-shadow:0 7px 0 var(--ink)}
.card .band{background:var(--accent);color:#fff;padding:5px 12px;font-size:13px;display:flex;justify-content:space-between;gap:8px}
.card .body{padding:10px 14px 14px}
.card h3{margin:0 0 4px;font-size:17px;line-height:1.5}
.card .em{font-size:30px;line-height:1}
.card.stub{opacity:.55;box-shadow:none}
.stamp{position:absolute;right:8px;bottom:6px;font-size:12px;color:#fff;background:#c0453a;border-radius:50%;width:46px;height:46px;display:grid;place-items:center;transform:rotate(-14deg);font-weight:800;border:2px dashed #fff;outline:2px solid #c0453a}
.badge{font-size:11px;border:1px solid currentColor;border-radius:6px;padding:0 6px;opacity:.85;margin-left:4px}
/* chapter */
.hero{background:var(--accent);color:#fff;padding:26px 0 30px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='260' height='260'><g fill='none' stroke='white' stroke-width='1.2' opacity='.18'><circle cx='200' cy='60' r='30'/><circle cx='200' cy='60' r='55'/><circle cx='200' cy='60' r='80'/><circle cx='200' cy='60' r='105'/></g></svg>") right top/260px no-repeat}
.hero .wrap{position:relative;z-index:1}
.hero .meta{font-size:13px;opacity:.9;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.hero .em{font-size:44px;line-height:1.1}
.hero h1{margin:.2em 0 .3em;font-size:clamp(24px,5vw,36px);line-height:1.4}
.hero .q{font-size:17px;background:#0002;border-left:5px solid #fff;padding:6px 12px;border-radius:0 10px 10px 0}
.back{display:inline-block;margin:10px 0;font-size:14px;text-decoration:none;color:var(--ink2)}
.sec{margin:26px 0}
.sec>h2{font-size:19px;margin:0 0 10px;display:flex;align-items:center;gap:8px}
.sec>h2::before{content:"";width:10px;height:22px;background:var(--accent);border-radius:3px}
.panel{background:var(--card);border:2px solid var(--ink);border-radius:14px;padding:14px 16px;box-shadow:0 4px 0 var(--ink)}
.opt{display:block;width:100%;text-align:left;font:inherit;border:2px solid var(--ink);background:#fff;border-radius:12px;padding:8px 14px;margin:8px 0;cursor:pointer;box-shadow:0 3px 0 var(--ink)}
.opt:hover{background:#f3f9f5}
.opt.ok{background:#d8f1e2;border-color:#2f7d5b}
.opt.ng{background:#fbe0dc;border-color:#c0453a}
.opt[disabled]{cursor:default}
.why{margin-top:8px;padding:8px 12px;background:#fff6d8;border-radius:10px;font-size:15px;display:none}
.why.show{display:block}
.flow{display:flex;flex-wrap:wrap;gap:6px;align-items:stretch;justify-content:center}
.flow .node{background:#fff;border:2px solid var(--ink);border-radius:12px;padding:8px 10px;text-align:center;min-width:92px;flex:1 1 92px;max-width:150px;font-size:14px;line-height:1.4}
.flow .node .e{font-size:28px;display:block}
.flow .ar{align-self:center;font-size:22px;color:var(--accent);font-weight:800}
.mini{height:240px;border:2px solid var(--ink);border-radius:12px;overflow:hidden}
.step{display:flex;gap:12px;margin:14px 0}
.step .n{flex:none;width:38px;height:38px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:0 3px 0 var(--ink);border:2px solid var(--ink)}
.step .c{background:var(--card);border:2px solid var(--ink);border-radius:14px;padding:10px 14px;flex:1;box-shadow:0 3px 0 var(--ink)}
.step h3{margin:0 0 3px;font-size:17px}
.step p{margin:0}
.one{background:var(--ink);color:#fff;padding:14px 18px;border-radius:14px;font-size:18px;font-weight:700;text-align:center;position:relative}
.one small{display:block;font-size:12px;opacity:.7;letter-spacing:.2em}
.fun{background:#fff6d8;border:2px dashed var(--gold);border-radius:14px;padding:12px 16px}
.fun b{color:#b8741a}
.nums{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}
.num{background:var(--card);border:2px solid var(--ink);border-radius:12px;padding:8px 12px}
.num .v{font-weight:800;font-size:18px;color:var(--accent)}
.num .a{font-size:12px;color:var(--ink2)}
details{background:var(--card);border:2px solid var(--line);border-radius:12px;padding:8px 14px;margin:8px 0}
summary{cursor:pointer;font-weight:700}
.pairs .card .body{padding:10px 14px}
.result{text-align:center;font-weight:800;margin-top:6px;color:var(--green)}
footer{text-align:center;font-size:12px;color:var(--ink2);padding:30px 0}
@media(max-width:560px){body{font-size:16px}.step .n{width:32px;height:32px}#map{height:240px}}

.thumb{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:2px solid var(--ink);background:var(--paper2)}
.hero.hasimg{background:linear-gradient(180deg,#0006 0%,#000b 100%),var(--bg) center/cover,var(--accent);padding:70px 0 26px}
.hero.hasimg::after{display:none}
.hero.hasimg h1,.hero.hasimg .meta{text-shadow:0 2px 8px #000a}

.tintro{margin:6px 0 12px;padding:10px 14px;background:var(--card);border:1px solid var(--line);border-left:5px solid var(--green);border-radius:8px;font-size:14.5px;line-height:1.8}

.col{max-width:40em;margin:6px auto 0;font-size:17px;line-height:2}
.col h2{font-size:20px;margin:1.8em 0 .4em;padding-left:.6em;border-left:5px solid var(--accent);line-height:1.5}
.col p{margin:0 0 1em}
.col .aside{background:#f6f2ea;border-radius:10px;padding:14px 18px;margin:1.6em 0;font-size:15.5px;line-height:1.9}
.col .aside b{display:block;font-size:12px;letter-spacing:.2em;color:#8a6d3b;margin-bottom:4px}
.hero .q{font-size:16px;line-height:1.9;max-width:44em}

.cat{margin:34px 0 8px}
.cat h2{font-size:22px;margin:0 0 4px;padding-bottom:8px;border-bottom:3px solid var(--accent);display:flex;align-items:center;gap:10px}
.cat h2 .ce{font-size:26px}
.cat h2 small{font:500 13px/1 inherit;font-family:inherit;color:#7a6f5d;margin-left:auto}
.cat .cintro{margin:8px 0 4px;color:#5d5444;font-size:15px;line-height:1.8;max-width:46em}
.chip small{opacity:.65;font-size:12px}

.reportnote{max-width:40em;margin:36px auto 0;padding-top:14px;border-top:1px solid #d8cfbd;font-size:13.5px;color:#6d6452;line-height:1.8}
.reportnote a{color:inherit;text-decoration:underline}