:root{--brand:#0d9488;--brand-dark:#0f766e;--brand-light:#ccfbf1;--ink:#0f172a;--ink-sub:#475569;
--line:#e2e8f0;--canvas:#f8fafc;--card:#ffffff;--accent:#f59e0b;--correct:#16a34a;--warn:#b45309;--warn-bg:#fffbeb;
--font:system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",sans-serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--canvas);line-height:1.7;font-size:16px}
a{color:var(--brand-dark)}a:hover{color:var(--brand)}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.site-header .wrap{display:flex;align-items:center;gap:16px;min-height:56px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.logo{display:flex;align-items:baseline;gap:6px;text-decoration:none;font-weight:700;letter-spacing:-.02em;font-size:1.15rem}
.logo .b1{color:#00aa9d}.logo .b2{color:#164f4b;font-size:.85rem;font-weight:600}
.nav{display:flex;gap:4px 14px;flex-wrap:wrap;font-size:.9rem;margin-left:auto}
.nav a{text-decoration:none;color:var(--ink-sub);padding:4px 0}.nav a:hover{color:var(--brand-dark)}
.search-form{display:flex;gap:6px;flex:1 1 220px;max-width:360px}
.search-form input{flex:1;padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:.95rem;min-width:0}
.search-form button{padding:8px 12px;border:0;border-radius:8px;background:var(--brand);color:#fff;font-weight:600;cursor:pointer}
main{padding:20px 0 40px}
.crumbs{font-size:.85rem;color:var(--ink-sub);margin:0 0 12px;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:4px}
.crumbs li+li::before{content:"›";margin:0 6px;color:#94a3b8}
.crumbs a{text-decoration:none}
h1{font-size:1.6rem;line-height:1.3;margin:0 0 6px}
.sub{color:var(--ink-sub);margin:0 0 16px;font-size:.95rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:0 0 16px}
.card h2{font-size:1.05rem;margin:0 0 10px;color:var(--ink)}
.meta{display:flex;flex-wrap:wrap;gap:6px 10px;font-size:.85rem;margin:0 0 14px}
.tag{display:inline-block;background:var(--brand-light);color:var(--brand-dark);border-radius:999px;padding:2px 10px;text-decoration:none;font-weight:600}
.tag.plain{background:#f1f5f9;color:var(--ink-sub)}
.stem{font-size:1.08rem;margin:0 0 14px;white-space:pre-wrap}
figure{margin:12px 0}figure img{max-width:100%;height:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
figcaption{font-size:.8rem;color:var(--ink-sub)}
.choices{list-style:none;padding:0;margin:0}
.choices li{display:flex;gap:10px;padding:8px 10px;border-top:1px solid var(--line)}
.choices li:first-child{border-top:0}
.choices .lbl{flex:0 0 1.6em;font-weight:700;color:var(--brand-dark)}
details.answer{margin-top:14px;border:1px solid var(--line);border-radius:10px;background:#f0fdfa}
details.answer summary{cursor:pointer;padding:12px 16px;font-weight:700;color:var(--brand-dark);list-style:none}
details.answer summary::-webkit-details-marker{display:none}
details.answer summary::before{content:"▶ ";font-size:.8em}
details[open].answer summary::before{content:"▼ "}
.answer-body{padding:0 16px 14px}
.answer-main{font-size:1.15rem;font-weight:700;margin:0 0 6px}
.answer-main .ok{color:var(--correct)}
.badge{display:inline-block;font-size:.75rem;font-weight:700;padding:1px 8px;border-radius:6px;margin-left:6px;vertical-align:middle;background:#fee2e2;color:#991b1b}
.badge.info{background:#e0f2fe;color:#075985}.badge.review{background:#dcfce7;color:#166534}.badge.ai{background:var(--warn-bg);color:var(--warn)}
.note{font-size:.9rem;color:var(--ink-sub);margin:6px 0 0}
.notice{background:var(--warn-bg);border:1px solid #fde68a;color:#78350f;border-radius:8px;padding:10px 12px;font-size:.9rem;margin:10px 0}
.keypoint{font-size:1.02rem;margin:0 0 8px;padding-left:12px;border-left:4px solid var(--brand)}
.stat{font-size:1rem;margin:0}.stat b{font-size:1.4rem;color:var(--brand-dark)}
.stat .bar{display:block;height:8px;background:#e2e8f0;border-radius:4px;overflow:hidden;margin-top:6px}
.stat .bar i{display:block;height:100%;background:var(--brand)}
.cta{background:linear-gradient(135deg,#0f766e,#0d9488);color:#fff;border-radius:14px;padding:22px 20px;margin:20px 0}
.cta h2{margin:0 0 6px;font-size:1.2rem;color:#fff}.cta p{margin:0 0 14px;opacity:.95}
.cta .btns{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-block;padding:10px 18px;border-radius:10px;text-decoration:none;font-weight:700}
.btn.primary{background:#fff;color:var(--brand-dark)}.btn.ghost{border:2px solid rgba(255,255,255,.8);color:#fff}
.pager{display:flex;justify-content:space-between;gap:10px;margin:16px 0}
.pager a{flex:1;text-decoration:none;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--card);font-size:.9rem}
.pager a.next{text-align:right}
.qlist{list-style:none;padding:0;margin:0}
.qlist li{padding:10px 0;border-top:1px solid var(--line);display:flex;gap:12px;align-items:flex-start}
.qlist li:first-child{border-top:0}
.qlist .qid{flex:0 0 5.2em;font-weight:700;text-decoration:none;color:var(--brand-dark)}
.qlist .qtext{flex:1;color:var(--ink);font-size:.95rem}
.qlist .qtext a{color:inherit;text-decoration:none}.qlist .qtext a:hover{text-decoration:underline}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin:0}
.grid a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--card);text-decoration:none;color:var(--ink)}
.grid a:hover{border-color:var(--brand)}
.grid a small{display:block;color:var(--ink-sub);font-size:.8rem}
.cols{columns:2;column-gap:24px}.cols li{break-inside:avoid;padding:3px 0}
@media (max-width:640px){.cols{columns:1}}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left}th{color:var(--ink-sub);font-weight:600}
td.num,th.num{text-align:right}
.hero{padding:26px 0 8px}.hero h1{font-size:1.9rem}.hero p{color:var(--ink-sub);max-width:640px}
.site-footer{border-top:1px solid var(--line);background:var(--card);padding:26px 0 40px;font-size:.82rem;color:var(--ink-sub)}
.site-footer p{margin:0 0 8px}
.site-footer nav{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:12px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
#results .hit{padding:10px 0;border-top:1px solid var(--line)}
#results .hit a{font-weight:700;text-decoration:none}