:root{--bg:#fbf8f5;--card:#fff;--ink:#1d1d1f;--sub:#5b6770;--line:#e6dfda;--brand:#b5303a;--brand2:#f6e4e5;--ok:#1f8a4c;--okbg:#e5f5ea;--ng:#c0392b;--ngbg:#fbe7e5;--shadow:0 1px 3px rgba(0,0,0,.06),0 4px 14px rgba(0,0,0,.04)}
@media (prefers-color-scheme:dark){:root{--bg:#16181b;--card:#1f2226;--ink:#eceff1;--sub:#a3adb5;--line:#33383e;--brand:#e0606a;--brand2:#3a2427;--ok:#5fd08f;--okbg:#1d3326;--ng:#ff8a7d;--ngbg:#3d2321}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic UI","Yu Gothic","Meiryo","Noto Sans TC","Microsoft JhengHei",sans-serif;line-height:1.8;font-size:16px}
a{color:var(--brand)}
rt{font-size:.55em;color:var(--sub)}
body.nofuri rt{visibility:hidden}
.top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:10px;padding:8px 14px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:18px;text-decoration:none;color:var(--ink)}.brand span{color:var(--brand);margin-left:6px;font-size:14px}
.top-tools{margin-left:auto;display:flex;gap:10px;align-items:center;font-size:14px}
.toggle{display:flex;align-items:center;gap:4px;white-space:nowrap}
select,input[type=text]{font:inherit;padding:6px 10px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink)}
.icon-btn{border:0;background:none;font-size:22px;cursor:pointer;color:var(--ink);padding:4px 8px}
.side{position:fixed;top:53px;left:0;bottom:0;width:270px;overflow:auto;background:var(--card);border-right:1px solid var(--line);padding:10px 8px 40px;z-index:25;transform:translateX(-100%);transition:transform .2s}
.side.open{transform:none}
.side a{display:block;padding:7px 10px;border-radius:8px;text-decoration:none;color:var(--ink);font-size:15px}
.side a:hover,.side a.active{background:var(--brand2)}
.side-h{margin:12px 10px 4px;font-size:12px;color:var(--sub);font-weight:700}
.scrim{display:none;position:fixed;inset:53px 0 0 0;background:rgba(0,0,0,.3);z-index:20}.scrim.show{display:block}
.main{max-width:980px;margin:0 auto;padding:18px 16px 60px}
@media(min-width:1100px){.side{transform:none}.scrim{display:none!important}#menuBtn{display:none}.main{margin-left:290px;max-width:900px}.foot{margin-left:290px}}
h1{font-size:26px;margin:6px 0 4px;line-height:2}h2{font-size:20px;margin:28px 0 10px;padding-left:10px;border-left:5px solid var(--brand)}h3{font-size:17px;margin:18px 0 6px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:12px 0;box-shadow:var(--shadow)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.lesson-card{display:block;text-decoration:none;color:var(--ink)}.lesson-card b{color:var(--brand)}
.lesson-card small{display:block;color:var(--sub);line-height:1.5}
.tabs{display:flex;gap:6px;overflow-x:auto;position:sticky;top:53px;background:var(--bg);padding:8px 0;z-index:10;scrollbar-width:none}
.tabs button{flex:0 0 auto}
.btn{font:inherit;font-size:15px;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:6px 14px;cursor:pointer}
.btn.on,.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn:disabled{opacity:.5}
.play{border:0;background:var(--brand2);color:var(--brand);border-radius:50%;width:34px;height:34px;min-width:34px;cursor:pointer;font-size:14px;line-height:34px;padding:0;vertical-align:middle}
.play:active{transform:scale(.92)}
.ja{font-size:19px;line-height:2.3}.zh{color:var(--sub);font-size:15px}
.row{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-bottom:1px dashed var(--line)}.row:last-child{border:0}.row>div{flex:1;min-width:0}
table{border-collapse:collapse;width:100%}th,td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}th{font-size:13px;color:var(--sub)}
.vt td.w{font-size:20px}.vt .k{font-size:13px;color:var(--sub)}
.vcards{display:none}
@media(max-width:700px){.vt{display:none}.vcards{display:block}.top-tools .toggle:last-child{display:none}h1{font-size:22px}}
.vc{display:flex;gap:10px;align-items:center;padding:10px 0;border-bottom:1px dashed var(--line)}.vc .w{font-size:21px}.vc .meta{font-size:13px;color:var(--sub);line-height:1.6}
.pill{display:inline-block;font-size:12px;padding:0 8px;border-radius:999px;background:var(--brand2);color:var(--brand);margin-left:4px}
.analysis h3{color:var(--brand)}.analysis li{margin:4px 0}
.ex{padding:12px 0;border-bottom:1px solid var(--line)}
.opts{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}
.opt{font:inherit;font-size:17px;padding:8px 14px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink);cursor:pointer;line-height:2}
.opt.ok{background:var(--okbg);border-color:var(--ok)}.opt.ng{background:var(--ngbg);border-color:var(--ng)}
.ansbox{margin-top:8px;padding:10px 12px;border-radius:10px;background:var(--okbg);display:none}.ansbox.show{display:block}
.ansbox.bad{background:var(--ngbg)}
.flash{min-height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;user-select:none}
.flash .big{font-size:44px;line-height:2.2}.flash .back{font-size:18px;color:var(--sub)}
.kana-t{width:100%;table-layout:fixed}.kana-t td{text-align:center;border:1px solid var(--line);padding:6px 2px;cursor:pointer}
.kana-t td:hover{background:var(--brand2)}.kana-t .h{font-size:24px}.kana-t .k{font-size:17px;color:var(--sub);margin-left:4px}.kana-t .r{display:block;font-size:11px;color:var(--sub)}
.checks{display:flex;flex-wrap:wrap;gap:6px 14px;margin:6px 0}.checks label{white-space:nowrap}
.quiz-q{font-size:30px;text-align:center;margin:14px 0;line-height:2.3}
.progress{height:8px;background:var(--line);border-radius:4px;overflow:hidden}.progress div{height:100%;background:var(--brand);transition:width .2s}
.fb{margin:10px 0;padding:10px 12px;border-radius:10px}.fb.ok{background:var(--okbg)}.fb.ng{background:var(--ngbg)}
.ansinput{font-size:20px;width:100%;max-width:420px}
.muted{color:var(--sub);font-size:14px}
.foot{text-align:center;color:var(--sub);font-size:12px;padding:20px 16px 40px}
.notes li{margin:4px 0}
.loading{text-align:center;color:var(--sub);padding:60px 0}
.btn{white-space:nowrap}
html,body{overflow-x:hidden;max-width:100%}
.main,.card{min-width:0;overflow-wrap:anywhere}
.ja{word-break:normal;overflow-wrap:anywhere}
table{display:block;overflow-x:auto}
.vt{display:table}
@media(max-width:700px){.vt{display:none}}