:root{--ink:#1f2933;--muted:#55606b;--bg:#fafaf8;--panel:#fff;--line:#e3e6e9;--acc:#2f6f5e;--acc2:#e8f3ef;--warn:#b7791f;--warn2:#fff7e6;--ad:#2b5f8c;--ad2:#eaf2fa;--max:780px;--wide:1080px}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.85 -apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif}
a{color:var(--acc)}img{max-width:100%}
header.top{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:5}
.hdr{max-width:var(--wide);margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{font-weight:700;text-decoration:none;color:var(--ink);font-size:17px}
.hdr-cta{background:var(--acc);color:#fff;text-decoration:none;padding:8px 14px;border-radius:8px;font-size:15px;white-space:nowrap}
nav.site{max-width:var(--wide);margin:0 auto;padding:0 8px;overflow-x:auto}
nav.site ul{list-style:none;margin:0;padding:0;display:flex;gap:2px}
nav.site a{display:block;padding:8px 12px;font-size:15px;color:var(--muted);text-decoration:none;border-bottom:3px solid transparent;white-space:nowrap}
nav.site a[aria-current]{color:var(--acc);border-color:var(--acc);font-weight:700}
main{max-width:var(--max);margin:0 auto;padding:24px 16px 56px}
main.wide{max-width:var(--wide)}
h1{font-size:26px;line-height:1.4;margin:8px 0 12px}h2{font-size:21px;margin:36px 0 12px;padding-left:12px;border-left:5px solid var(--acc)}h3{font-size:18px;margin:24px 0 8px}
p,li{font-size:16px}
.lead{color:var(--muted);font-size:16px}
.summary{background:var(--acc2);border-left:5px solid var(--acc);padding:14px 16px;border-radius:8px;margin:16px 0}
.summary>strong{display:block;margin-bottom:6px}
.note{background:var(--warn2);border-left:5px solid var(--warn);padding:12px 16px;border-radius:8px;margin:16px 0}
ol.steps{padding-left:0;list-style:none;counter-reset:s}
ol.steps li{position:relative;padding:10px 12px 10px 48px;margin:8px 0;background:var(--panel);border:1px solid var(--line);border-radius:8px;counter-increment:s}
ol.steps li::before{content:counter(s);position:absolute;left:12px;top:10px;width:26px;height:26px;border-radius:50%;background:var(--acc);color:#fff;text-align:center;line-height:26px;font-weight:700;font-size:14px}
.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:12px 0}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:16px}
table.t2{min-width:0;table-layout:fixed}table.t2 td:first-child,table.t2 th:first-child{width:34%}table.t2 td{word-break:break-word}
th,td{border:1px solid var(--line);padding:9px 10px;text-align:left;vertical-align:top;background:#fff}th{background:#f0f2f4}
.adbox{background:var(--ad2);border:1px solid #c9dcee;border-radius:10px;padding:14px 16px;margin:20px 0}
.adbox .tag{display:inline-block;font-size:12px;background:var(--ad);color:#fff;padding:2px 8px;border-radius:4px;margin-bottom:6px}
.adbox a.btn{display:inline-block;background:var(--ad);color:#fff;text-decoration:none;padding:10px 16px;border-radius:8px;margin-top:6px;font-weight:700}
.adbox .pending{color:var(--muted);font-size:16px}
.related{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:24px 0}
.related>strong{display:block;margin-bottom:6px}.related a{display:block;padding:4px 0}
.hero{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px 20px;margin:8px 0 20px}
.chips span{display:inline-block;background:var(--acc2);color:var(--acc);padding:4px 10px;border-radius:999px;font-size:14px;margin:4px 6px 0 0}
.btn-main{display:inline-block;background:var(--acc);color:#fff;text-decoration:none;padding:14px 22px;border-radius:10px;font-size:17px;font-weight:700;margin-top:12px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin:12px 0}
.tile{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px;text-decoration:none;color:var(--ink)}
.tile strong{display:block;color:var(--acc);margin-bottom:4px}.tile span{font-size:16px;color:var(--muted)}
footer{border-top:1px solid var(--line);background:#fff;margin-top:40px}
footer .in{max-width:var(--wide);margin:0 auto;padding:20px 16px;font-size:16px;color:var(--muted)}
footer a{color:var(--muted);margin-right:14px}
.src{font-size:16px;color:var(--muted)}.src li{font-size:16px}
.date{font-size:16px;color:var(--muted)}
/* quiz */
.q{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;margin:12px 0}
.q h3{margin:0 0 8px;font-size:17px}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opts button{font:inherit;font-size:15.5px;padding:10px 14px;border:1.5px solid var(--line);background:#fff;border-radius:8px;cursor:pointer}
.opts button[aria-pressed="true"]{border-color:var(--acc);background:var(--acc2);font-weight:700}
.prog{font-size:16px;color:var(--muted);margin:4px 0 8px}
.result h2{border:0;padding:0;font-size:22px}
.result .why{color:var(--muted);font-size:15.5px}
.flag{background:var(--warn2);border-left:4px solid var(--warn);padding:8px 12px;border-radius:6px;margin:8px 0;font-size:15.5px}
@media (max-width:640px){h1{font-size:23px}h2{font-size:19px}p,li{font-size:16px}}