/* lonloop.com — 日语 (Japanese) section styles.
   Own stylesheet, same as /collection/ (reader.css), /radar/ (radar.css) and
   /travel/ (travel.css). Design tokens, the a11y base and .topnav are byte-for-byte
   the values those three carry — four copies of one contract now; keep them in
   sync (see reader.css on the --dim drift that diffing them once caught).

   Japanese text is always wrapped in lang="ja" so the browser picks a Japanese
   font: in a Chinese font 骨, 直, 角 and many other kanji are drawn with the
   Chinese glyph shape, which a beginner would copy. */
:root{
  --bg:#0b0d12; --bg2:#11141b; --card:#151924; --line:#222838;
  --txt:#e7eaf0; --muted:#9aa3b2; --dim:#808999;
  --accent:#7c9cff; --accent2:#5be0c8; --chip:#1b2130;
  --radius:16px;
  --hi:#ffb86b; --lo:#7c9cff; --ok:#5be0c8; --bad:#ff7a90;
  --jp:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","YuGothic","Noto Sans JP","Noto Sans CJK JP","Meiryo",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:radial-gradient(1200px 600px at 80% -10%, #1a2030 0%, var(--bg) 55%) no-repeat, var(--bg);
  color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  line-height:1.65; -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
a{color:inherit}
:lang(ja){font-family:var(--jp)}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}

/* top nav — same guard as travel.css (labels never split; row wraps instead) */
.topnav{max-width:880px;margin:0 auto;padding:20px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.topnav .brand{font-weight:800;font-size:20px;letter-spacing:-.02em;text-decoration:none;color:var(--txt)}
.topnav .brand .dot{color:var(--accent)}
.topnav .tabs{display:flex;flex-wrap:wrap;gap:6px}
.topnav .tab{text-decoration:none;color:var(--muted);font-weight:600;font-size:15px;padding:7px 14px;border-radius:999px;white-space:nowrap;transition:color .15s ease,background .15s ease}
.topnav .tab:hover{color:var(--txt)}
.topnav .tab[aria-current]{color:var(--accent);background:var(--chip)}

/* ---------- layout ---------- */
.jp{max-width:880px;margin:0 auto;padding:28px 24px 96px}
.jp.narrow{max-width:760px}
.crumb{font-size:13.5px;color:var(--dim);margin-bottom:18px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--accent)}
.page-head{margin-bottom:28px}
.page-head .eyebrow{color:var(--accent2);font-weight:600;letter-spacing:.14em;text-transform:uppercase;font-size:13px}
.page-head h1{font-size:clamp(28px,5.6vw,42px);letter-spacing:-.02em;margin:8px 0 12px;font-weight:800;line-height:1.25}
.page-head .lead{color:var(--muted);font-size:16.5px;max-width:680px}
.page-head .meta{display:flex;flex-wrap:wrap;gap:8px 14px;margin-top:14px;color:var(--dim);font-size:13px}
.page-head .meta span{background:var(--chip);border:1px solid var(--line);border-radius:999px;padding:3px 10px}

/* ---------- prose ---------- */
.prose{font-size:16.5px;line-height:1.85;color:#d7dbe4}
.prose p{margin:0 0 16px}
.prose h2{font-size:22px;font-weight:750;color:var(--txt);margin:44px 0 12px;line-height:1.4;scroll-margin-top:72px}
.prose h3{font-size:18px;font-weight:700;color:var(--txt);margin:28px 0 10px}
.prose ul,.prose ol{margin:0 0 16px;padding-left:22px}
.prose li{margin:5px 0}
.prose a{color:var(--accent)}
.prose strong,.prose b{color:var(--txt);font-weight:700}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;background:var(--chip);border:1px solid var(--line);border-radius:5px;padding:1px 6px;color:#cdd6f5}
.prose .jpw{font-size:1.08em;color:var(--txt)}
.prose table{width:100%;border-collapse:collapse;margin:8px 0 20px;font-size:15px}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:9px 10px;text-align:left;vertical-align:top}
.prose th{color:var(--dim);font-weight:700;font-size:13px;letter-spacing:.04em}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:8px 0 20px}
.tablewrap table{margin:0;min-width:520px}
.ipa{font-family:"Doulos SIL","Charis SIL","Gentium Plus","Lucida Grande","Segoe UI",sans-serif;color:var(--accent2)}
.rom{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--muted);font-size:.92em}

/* callouts */
.callout{background:var(--bg2);border:1px solid var(--line);border-left:3px solid var(--accent2);border-radius:10px;padding:13px 16px;margin:18px 0;color:var(--muted);font-size:15px;line-height:1.75}
.callout b,.callout strong{color:var(--txt)}
.callout.warn{border-left-color:var(--hi)}
.callout.zh{border-left-color:#ff7a90}
.callout .ct{display:block;color:var(--txt);font-weight:700;margin-bottom:4px;font-size:14.5px}
.callout p{margin:0 0 8px}.callout p:last-child{margin:0}

/* ---------- toolbar (voice / speed / romaji) ---------- */
.tools{position:sticky;top:0;z-index:20;background:rgba(11,13,18,.9);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);margin:0 -24px 22px;padding:9px 24px;display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;font-size:13.5px;color:var(--dim)}
.tools .grp{display:flex;align-items:center;gap:4px}
.tools .lbl{margin-right:2px}
.seg{display:inline-flex;background:var(--chip);border:1px solid var(--line);border-radius:999px;padding:2px}
.seg button{background:none;border:0;color:var(--muted);font:inherit;font-size:13px;padding:4px 10px;border-radius:999px;cursor:pointer;white-space:nowrap}
.seg button[aria-pressed="true"]{background:#26304a;color:var(--txt)}
.seg button:hover{color:var(--txt)}

/* ---------- play button ---------- */
.say{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-width:30px;height:30px;padding:0 9px;border-radius:999px;border:1px solid var(--line);background:var(--chip);color:var(--accent);font:inherit;font-size:13px;cursor:pointer;vertical-align:middle;transition:border-color .15s ease,background .15s ease}
.say:hover{border-color:var(--accent)}
.say svg{width:12px;height:12px;fill:currentColor}
.say.playing{background:#22305a;border-color:var(--accent)}
.say .vt{color:var(--dim);font-size:11.5px}
.say[disabled]{opacity:.4;cursor:not-allowed}
.say.has-h::after{content:"真人";font-size:11px;color:var(--accent2);margin-left:1px}
.no-human .say.has-h::after{content:none}
.hbadge{font-size:11px;color:var(--accent2);border:1px solid rgba(91,224,200,.35);border-radius:6px;padding:0 5px;line-height:17px}

/* ---------- lesson index / roadmap ---------- */
.stage{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;margin:0 0 18px}
.stage.soon{background:transparent;border-style:dashed}
.stage-h{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 14px;margin-bottom:6px}
.stage-h h2{font-size:20px;font-weight:750;margin:0}
.badge{font-size:11px;font-weight:700;letter-spacing:.04em;padding:3px 8px;border-radius:999px;background:rgba(124,156,255,.12);color:var(--accent);border:1px solid rgba(124,156,255,.25);white-space:nowrap}
.badge.live{background:rgba(91,224,200,.12);color:var(--accent2);border-color:rgba(91,224,200,.3)}
.badge.plan{background:transparent;color:var(--dim);border-color:var(--line)}
.stage p{color:var(--muted);font-size:14.5px}
.lessons{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:10px}
.lessons li a{display:flex;gap:14px;align-items:center;text-decoration:none;background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;transition:border-color .15s ease,transform .15s ease}
.lessons li a:hover{border-color:#33405e;transform:translateY(-2px)}
.lessons .no{flex:0 0 34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--chip);color:var(--accent);font-weight:800;font-size:14px}
.lessons .done .no{background:rgba(91,224,200,.15);color:var(--accent2)}
.lessons .tt{flex:1;min-width:0}
.lessons .tt b{display:block;color:var(--txt);font-size:15.5px}
.lessons .tt span{display:block;color:var(--dim);font-size:13px;line-height:1.5}
.lessons .st{color:var(--dim);font-size:12px;white-space:nowrap}
.lessons .done .st{color:var(--accent2)}
.plan-list{color:var(--muted);font-size:14.5px;margin:10px 0 0 18px}
.plan-list li{margin:4px 0}
.progress{height:6px;background:var(--chip);border-radius:999px;overflow:hidden;margin:10px 0 2px}
.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));width:0;transition:width .4s ease}

/* ---------- kana grid ---------- */
.kgrid{width:100%;border-collapse:separate;border-spacing:6px;margin:6px -6px 14px;table-layout:fixed}
.kgrid th{color:var(--dim);font-size:12px;font-weight:600;padding:0;text-align:center}
.kgrid th.rowh{width:44px;text-align:right;padding-right:4px;white-space:nowrap}
.kgrid td{padding:0}
.kcell{width:100%;aspect-ratio:1/1.05;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;background:var(--card);border:1px solid var(--line);border-radius:12px;color:var(--txt);cursor:pointer;font:inherit;transition:border-color .15s ease,transform .1s ease,background .15s ease;position:relative}
.kcell:hover{border-color:var(--accent)}
.kcell:active{transform:scale(.97)}
.kcell .k{font-family:var(--jp);font-size:clamp(22px,5.4vw,34px);line-height:1.1}
.kcell .r{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:clamp(10.5px,2.4vw,13px);color:var(--muted)}
.kcell.playing{background:#1e2843;border-color:var(--accent)}
.kcell.known::after{content:"";position:absolute;top:6px;right:6px;width:6px;height:6px;border-radius:50%;background:var(--accent2)}
.kgrid.youon{max-width:520px}
.no-romaji .kcell .r,.no-romaji .rom-opt{visibility:hidden}

/* kana detail dialog */
dialog.kd{margin:auto;width:min(560px,calc(100% - 24px));max-height:calc(100% - 24px);background:var(--card);color:var(--txt);border:1px solid #2c3550;border-radius:18px;padding:0;box-shadow:0 30px 80px rgba(0,0,0,.6)}
dialog.kd::backdrop{background:rgba(5,7,10,.72)}
.kd-in{padding:20px 22px 22px}
.kd-top{display:flex;gap:18px;align-items:flex-start}
.kd-stroke{flex:0 0 150px;height:150px;background:#f4f1ea;border-radius:14px;position:relative;overflow:hidden}
.kd-stroke svg{width:100%;height:100%}
.kd-stroke.wide{flex-basis:220px;width:220px}
.kd-stroke .grid{stroke:#d9d2c3;stroke-width:.6;stroke-dasharray:2 2;fill:none}
.kd-stroke path.s{fill:none;stroke:#1b1d24;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}
.kd-stroke path.ghost{fill:none;stroke:#d8d2c6;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}
.kd-stroke text{font-size:8px;fill:#c2462f;font-family:-apple-system,sans-serif}
.kd-info{flex:1;min-width:0}
.kd-info .big{font-family:var(--jp);font-size:52px;line-height:1}
.kd-info dl{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;margin-top:10px;font-size:14px}
.kd-info dt{color:var(--dim)}
.kd-info dd{color:var(--txt)}
.kd-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.kd-btn{background:var(--chip);color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font:inherit;font-size:13.5px;cursor:pointer}
.kd-btn:hover{color:var(--txt);border-color:var(--accent)}
.kd-ex{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:14.5px;color:var(--muted)}
.kd-ex .w{font-family:var(--jp);color:var(--txt);font-size:20px}
.kd-close{position:absolute;top:10px;right:12px;background:none;border:0;color:var(--dim);font-size:22px;cursor:pointer;line-height:1;padding:4px 8px}
.kd-close:hover{color:var(--txt)}
.kd-origin{font-size:13px;color:var(--dim);margin-top:8px;line-height:1.6}
@media (max-width:480px){.kd-top{flex-direction:column;align-items:center}.kd-info{width:100%}}

/* ---------- word list ---------- */
.words{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;margin:10px 0 18px}
.word{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:11px 13px;display:flex;flex-direction:column;gap:4px;min-width:0}
.word .top{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.word .jw{font-family:var(--jp);font-size:20px;color:var(--txt);line-height:1.25;word-break:keep-all}
.word .kn{font-family:var(--jp);font-size:14px;color:var(--muted)}
.word .zh{font-size:13.5px;color:var(--dim);line-height:1.5}
.word .acc{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:2px}
.word .plays{display:flex;gap:4px;flex-shrink:0}
.accn{font-size:11px;font-weight:700;color:var(--hi);border:1px solid rgba(255,184,107,.35);border-radius:6px;padding:0 6px;line-height:18px;white-space:nowrap}
.acct{font-size:11.5px;color:var(--dim)}

/* pitch pattern (dots + lines), drawn at build time */
svg.pp{display:block;height:auto;overflow:visible}
svg.pp .ln{stroke:var(--hi);stroke-width:1.6;fill:none}
svg.pp .dt{fill:var(--hi)}
svg.pp .dt.pt{fill:var(--bg);stroke:var(--hi);stroke-width:1.4}
svg.pp .mk{font-family:var(--jp);font-size:13px;fill:var(--txt)}
svg.pp .mk.pt{fill:var(--dim)}

/* measured F0 curve */
.f0{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin:8px 0}
.f0 svg{display:block;width:100%;height:auto}
.f0 .cv{fill:none;stroke:var(--accent2);stroke-width:2}
.f0 .bd{stroke:#2a3248;stroke-width:1}
.f0 .lab{font-family:var(--jp);font-size:12px;fill:var(--muted)}
.f0 .cap{font-size:12px;color:var(--dim);margin-top:4px}

/* minimal pairs */
.pairs{display:grid;gap:10px;margin:10px 0 18px}
.pair{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.pair .pr{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center}
.pair .pi{display:flex;align-items:center;gap:8px;min-width:0}
.pair .pi .jw{font-family:var(--jp);font-size:19px;color:var(--txt)}
.pair .pi .zh{font-size:13px;color:var(--dim)}
.pair .vs{color:var(--dim);font-size:13px}
.pair .note{font-size:13px;color:var(--dim);margin-top:6px}

/* drill */
.drill{background:var(--card);border:1px solid #2c3550;border-radius:var(--radius);padding:18px 20px;margin:18px 0}
.drill h3{margin:0 0 4px !important;font-size:17px !important}
.drill .dd{color:var(--dim);font-size:13.5px;margin-bottom:14px}
.drill .q{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.drill .big-say{height:48px;min-width:48px;font-size:15px;padding:0 18px}
.drill .opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px}
.drill .opt{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:12px 10px;color:var(--txt);font:inherit;cursor:pointer;text-align:center;line-height:1.35}
.drill .opt .jw{display:block;font-family:var(--jp);font-size:20px}
.drill .opt .zh{display:block;font-size:12.5px;color:var(--dim)}
.drill .opt:hover{border-color:var(--accent)}
.drill .opt.right{border-color:var(--ok);background:rgba(91,224,200,.08)}
.drill .opt.wrong{border-color:var(--bad);background:rgba(255,122,144,.08)}
.drill .fb{min-height:24px;margin-top:12px;font-size:14px;color:var(--muted)}
.drill .fb.ok{color:var(--ok)}.drill .fb.no{color:var(--bad)}
.drill .score{font-size:13px;color:var(--dim);margin-top:4px}
.drill .next{margin-top:10px}

/* flashcards (practice page) */
.deck-pick{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:8px 0 16px}
.deck-pick label{display:flex;gap:10px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:11px 13px;cursor:pointer;font-size:14.5px}
.deck-pick input{margin-top:4px;accent-color:var(--accent)}
.deck-pick small{display:block;color:var(--dim);font-size:12.5px}
.fc{background:var(--card);border:1px solid #2c3550;border-radius:20px;padding:26px 22px;text-align:center;margin:12px 0}
.fc .face{font-family:var(--jp);font-size:clamp(60px,18vw,96px);line-height:1.1;margin:6px 0 14px;min-height:1.1em}
.fc .face.small{font-size:clamp(26px,7vw,40px)}
.fc .ans{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:6px}
.fc input.typed{background:var(--bg2);border:1px solid var(--line);border-radius:12px;color:var(--txt);font:inherit;font-size:20px;padding:10px 14px;width:min(260px,100%);text-align:center;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.fc input.typed:focus{border-color:var(--accent);outline:none}
.fc .reveal{margin-top:14px;font-size:15px;color:var(--muted);min-height:48px}
.fc .reveal .jw{font-family:var(--jp);font-size:22px;color:var(--txt)}
.btn{background:var(--chip);color:var(--txt);border:1px solid var(--line);border-radius:999px;padding:9px 18px;font:inherit;font-size:14.5px;cursor:pointer}
.btn:hover{border-color:var(--accent)}
.btn.pri{background:#26304a;border-color:#3a4a73}
.stats{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--dim);font-size:13.5px;justify-content:center;margin-top:10px}
.stats b{color:var(--txt)}

/* verification report */
.vsum{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:12px 0 22px}
.vsum div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.vsum b{display:block;font-size:24px;color:var(--txt);font-weight:800}
.vsum span{font-size:12.5px;color:var(--dim)}
.vt-ok{color:var(--ok)}.vt-no{color:var(--bad)}
details.vd{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin:10px 0}
details.vd summary{cursor:pointer;color:var(--txt);font-weight:700}
.vtable{font-size:13px !important}
.vtable td,.vtable th{padding:6px 8px !important}

/* lesson footer nav + done toggle */
.lesson-end{margin-top:40px;padding-top:22px;border-top:1px solid var(--line)}
.done-toggle{display:inline-flex;align-items:center;gap:8px;background:var(--chip);border:1px solid var(--line);border-radius:999px;padding:9px 16px;color:var(--txt);font:inherit;font-size:14.5px;cursor:pointer}
.done-toggle[aria-pressed="true"]{border-color:var(--accent2);color:var(--accent2)}
.lnav{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}
.lnav a{display:block;text-decoration:none;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px;color:var(--txt);font-size:14.5px}
.lnav a span{display:block;color:var(--dim);font-size:12px}
.lnav a.nx{text-align:right;grid-column:2}
.lnav a:hover{border-color:#33405e}
.srcbox{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:28px;font-size:13.5px;color:var(--muted);line-height:1.7}
.srcbox b{color:var(--txt)}
.srcbox ul{margin:6px 0 0 18px}
.srcbox a{color:var(--accent)}

.site-foot{max-width:880px;margin:0 auto;padding:26px 24px 48px;border-top:1px solid var(--line);color:var(--dim);font-size:14px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between}
.site-foot a{color:var(--muted);text-decoration:none}
.site-foot a:hover{color:var(--accent)}
.site-foot .lic{flex-basis:100%;font-size:12.5px;line-height:1.6}

@media (max-width:520px){
  .jp,.site-foot{padding-left:16px;padding-right:16px}
  .tools{margin:0 -16px 20px;padding:8px 16px}
  .kgrid{border-spacing:4px;margin:6px -4px 14px}
  .kgrid th.rowh{width:30px;font-size:11px}
  .words{grid-template-columns:1fr}
}