:root{--paper:#eef1f6;--paper2:#dfe5ef;--ink:#1d2540;--ink2:#58617c;--line:rgba(29,37,64,.2);--card:#fbfcff;--green:#2d5fa8;--gold:#c08a2e;--accent:#2d5fa8;--shadow:0 2px 0 rgba(29,37,64,.12),0 6px 16px rgba(29,37,64,.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='240' height='240'><g fill='%23a9b4cc' opacity='.6'><circle cx='30' cy='40' r='1.6'/><circle cx='120' cy='90' r='1.2'/><circle cx='200' cy='30' r='1.8'/><circle cx='70' cy='170' r='1.3'/><circle cx='190' cy='200' r='1.5'/></g><path d='M30 40 L120 90 L200 30' stroke='%23a9b4cc' fill='none' opacity='.35'/></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}
.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}

.ic{width:1.15em;height:1.15em;vertical-align:-.2em;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.links{display:grid;gap:8px}.links a{display:block;padding:8px 12px;border:2px solid var(--ink);border-radius:12px;background:var(--card);text-decoration:none}.links small{display:block;color:var(--ink2)}
footer a{margin:0 .4em}

/* ===== トップ作り直し（2026-11-09）：空から地面の下へ降りる ===== */
body.home{background:#070b24}
.hero0{position:relative;min-height:92svh;display:flex;align-items:flex-start;justify-content:center;overflow:hidden;color:#fff;background:#070b24}
.hero0 .scene{position:absolute;inset:0;width:100%;height:100%}
.hero-in{position:relative;z-index:2;text-align:center;padding-top:clamp(40px,9vh,90px);text-shadow:0 2px 14px #0008}
.hero-in .kick{letter-spacing:.3em;font-size:12px;opacity:.9}
.hero-in h1{margin:.1em 0;font-size:clamp(38px,9vw,72px);font-weight:800;letter-spacing:.1em}
.hero-in h1 em{font-style:normal;color:#ffe08a}
.hero-in p{margin:.4em auto;max-width:30em;font-size:clamp(14px,2.6vw,17px)}
.hero0 .stats{background:#0b1030aa;color:#fff;border:1px solid #ffffff55;box-shadow:none;text-shadow:none}
.hero0 .stats b{color:#ffe08a}
.tw{animation:tw 3.2s ease-in-out infinite}
@keyframes tw{0%,100%{opacity:.35}50%{opacity:1}}
.cl.c1{animation:dr 28s linear infinite alternate}.cl.c2{animation:dr 34s linear infinite alternate-reverse}
@keyframes dr{from{transform:translateX(-40px)}to{transform:translateX(60px)}}
.rain{animation:rn 1.3s linear infinite}
@keyframes rn{from{transform:translateY(-8px);opacity:.2}to{transform:translateY(20px);opacity:.8}}
.planet{animation:fl 7s ease-in-out infinite alternate}
@keyframes fl{from{transform:translate(190px,190px)}to{transform:translate(190px,204px)}}
.down{position:absolute;left:50%;bottom:22px;transform:translateX(-50%);z-index:3;color:#fff;text-decoration:none;font-size:13px;text-align:center;display:flex;flex-direction:column;align-items:center;text-shadow:0 1px 6px #000a}
.down svg{width:30px;height:30px;stroke:#fff;fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;animation:bn 1.6s ease-in-out infinite}
@keyframes bn{50%{transform:translateY(6px)}}
.zn{position:sticky;top:0;z-index:20;display:flex;gap:6px;overflow-x:auto;padding:8px 12px;background:#2a1d14ee;backdrop-filter:blur(6px);justify-content:center}
.zn a{display:flex;align-items:center;gap:5px;color:#fff;text-decoration:none;font-size:13px;white-space:nowrap;padding:4px 11px;border-radius:99px;border:1px solid #ffffff55}
.zn a:hover{background:#ffffff25}
.zn .ic{width:16px;height:16px;stroke:#fff}
.zone{padding:34px 0 46px;position:relative;color:#fff}
.zone .wrap{max-width:900px}
.zh{display:flex;gap:14px;align-items:center;margin-bottom:16px}
.zi{width:54px;height:54px;flex:none;stroke:#fff;fill:none;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;background:#ffffff1c;border-radius:16px;padding:9px}
.zh h2{margin:0;font-size:clamp(24px,5vw,32px);letter-spacing:.06em}
.zh p{margin:0;opacity:.92;font-size:14.5px}
.z-space{background:linear-gradient(#070b24,#1c2a72)}
.z-sky{background:linear-gradient(#1c2a72,#3f77b5 45%,#9ccbe8)}
.z-earth{background:linear-gradient(#9ccbe8,#7f9a62 18%,#6d7d4a 55%,#6b5638)}
.z-bosai{background:linear-gradient(#6b5638,#59432d)}
.z-history{background:linear-gradient(#59432d,#7a5a3a 25%,#5f4129 55%,#3f2a1a)}
.z-sky .zh,.z-sky .zh p{text-shadow:0 1px 8px #0006}
.zone .grid{margin:6px 0 0;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.zone .card{background:#fffdf7;border:0;border-radius:18px;box-shadow:0 8px 20px #0005;color:#1d2540}
.zone .card:hover{transform:translateY(-4px) rotate(-.4deg);box-shadow:0 12px 26px #0007}
.card .tp{position:relative;aspect-ratio:5/3;overflow:hidden;background:var(--tg,#2a3a7a)}
.z-space .tp{--tg:linear-gradient(160deg,#0e1a55,#35439b)}
.z-sky .tp{--tg:linear-gradient(160deg,#2e72b3,#78b4dc)}
.z-earth .tp{--tg:linear-gradient(160deg,#4a6b3a,#8a7a4a)}
.z-bosai .tp{--tg:linear-gradient(160deg,#a8452f,#e0884a)}
.z-history .tp{--tg:linear-gradient(160deg,#6b4a8a,#a86a4a)}
.card .tp{background:var(--tg)}
.tsvg,.card .thumb{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.zone .card .body{padding:11px 14px 15px}
.zone .card h3{font-size:16.5px}
.zone .stamp{right:8px;bottom:8px;top:auto}
@media(max-width:560px){.zone .grid{grid-template-columns:1fr 1fr;gap:10px}.zone .card h3{font-size:14px}.zone .card .body{padding:8px 10px 12px}.hero0{min-height:86svh}.zi{width:44px;height:44px}}
@media(prefers-reduced-motion:reduce){.tw,.cl,.rain,.planet,.down svg{animation:none}}
.planet{transform:translate(190px,190px)}
@media(max-width:600px){.moon{transform:translate(-300px,215px)}.plw{transform:translate(255px,185px)}.cw1{display:none}}

.aitag{display:none;position:absolute;left:6px;bottom:5px;font-size:10px;color:#fff;background:#0009;border-radius:6px;padding:0 6px;line-height:1.7}
.tp.pic .aitag{display:block}
.card .thumb{z-index:1}.card .aitag,.card .stamp{z-index:2}
.card .thumb{background:transparent;opacity:0;transition:opacity .4s}
.tp.pic .thumb{opacity:1}

/* column */
.col{max-width:40rem;margin:8px auto 24px}.col .rt{font-size:.8rem;color:#777;margin-bottom:10px}
.col p{font-size:1.04rem;line-height:2.0;margin:0 0 1.1em}.col .lede p{font-size:1.12rem;line-height:2.05;color:#2a2a38}
.col section{margin-top:2em}.col h2{font-size:1.25rem;margin:0 0 .6em;padding-left:.7em;border-left:4px solid var(--accent,#666)}
.col .aside{background:rgba(0,0,0,.035);border-radius:12px;padding:12px 14px;font-size:.92rem;line-height:1.8;margin:1em 0}.col .aside b{display:block;margin-bottom:4px}
.col .endc p{font-weight:600}
@media(max-width:600px){.col p{font-size:1rem;line-height:1.95}}

.emerg{border-left:4px solid #c0392b;background:rgba(192,57,43,.06)}.emerg p{margin:0 0 .6em;line-height:1.9}.emerg p:last-child{margin:0}