:root{
  /* --- palet Naehongo: kertas krem, hijau sage, sakura --- */
  --bg:#F7F3EA;
  --bg2:#EFE8DA;
  --card:#FFFFFF;
  --card2:#F5EFE5;
  --border:#E2D8C6;
  --text:#2E2C2B;
  --text2:#4A463F;
  --muted:#6E6558;
  --accent:#4F7249;
  --accent2:#3B5837;
  --sage:#8FAE89;
  --sage-soft:#DCE7D9;
  --pink:#B23F5A;
  --pink-soft:#F6DEE3;
  --sakura:#E1889B;
  --green:#3F7A46;
  --yellow:#8F630D;
  --red:#B93B36;
  --blue:#356A9C;
  --n5:#3F7A46;
  --n4:#356A9C;
  --n3:#B23F5A;
  --n2:#6F52A0;
  --travel:#98581F;
  --kana:#2A7079;
  --kanji:#7E44A6;
  --radius:14px;
  --shadow:0 2px 10px rgba(94,78,54,.07),0 1px 3px rgba(94,78,54,.05);
  --shadow-lg:0 6px 24px rgba(94,78,54,.10),0 2px 6px rgba(94,78,54,.06);
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{font-size:16px}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'Inter','Noto Sans JP',sans-serif;
  min-height:100vh;
  background-image:radial-gradient(circle at 12% 8%,rgba(143,174,137,.10),transparent 42%),
                   radial-gradient(circle at 88% 4%,rgba(225,136,155,.10),transparent 38%);
  background-attachment:fixed;
}
.jp{font-family:'Noto Sans JP','Inter',sans-serif}
#app{max-width:920px;margin:0 auto;padding:0 14px 90px}
#topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 2px;position:sticky;top:0;z-index:50;
  background:linear-gradient(var(--bg) 75%,transparent);
}
.brand{display:flex;align-items:center;gap:9px;cursor:pointer;font-weight:800;font-size:1.05rem}
.brand-icon{font-size:1.4rem}
.brand-mark{width:30px;height:30px;flex-shrink:0;display:block}
.brand-name{font-family:'Quicksand','Inter',sans-serif;font-weight:700;letter-spacing:-.01em}
.brand-name .o{color:var(--sakura)}
#mainnav{display:flex;gap:4px}
#mainnav button{
  background:none;border:none;color:var(--muted);font-family:inherit;
  font-size:.85rem;font-weight:600;padding:8px 12px;border-radius:10px;cursor:pointer;
  transition:.15s;
}
#mainnav button:hover{color:var(--text);background:var(--card2)}
#mainnav button.active{color:#fff;background:var(--accent)}
main{padding-top:8px}
h1{font-size:1.5rem;margin-bottom:4px}
h2{font-size:1.15rem;margin:18px 0 10px}
.sub{color:var(--muted);font-size:.9rem;margin-bottom:18px}

.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;margin-bottom:14px;box-shadow:var(--shadow);
}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.statnum{font-size:1.9rem;font-weight:800;color:var(--accent)}
/* kartu berlatar warna pekat: paksa teks putih supaya tidak hilang */
.card.solid{color:#fff;border:none}
.card.solid .statnum,.card.solid h1,.card.solid h2,.card.solid b{color:#fff}
.card.solid .statlbl,.card.solid .sub,.card.solid .lr-sub{color:rgba(255,255,255,.82)}
.card.solid .btn{background:#fff;color:var(--accent2)}
.card.solid .btn:hover{background:var(--card2)}
.card.solid .btn:disabled{opacity:.55}
.statlbl{color:var(--muted);font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em}

.btn{
  display:inline-block;background:var(--accent);color:#fff;border:none;border-radius:11px;
  font-family:inherit;font-size:.95rem;font-weight:700;padding:12px 22px;cursor:pointer;
  transition:.15s;text-align:center;
}
.btn:hover{background:var(--accent2);transform:translateY(-1px)}
.btn:disabled{opacity:.4;cursor:default;transform:none}
.btn.secondary{background:var(--card2);color:var(--text);border:1px solid var(--border)}
.btn.secondary:hover{background:var(--bg2)}
.btn.green{background:var(--green);color:#fff}
.btn.green:hover{background:#33683A}
.btn.burn{background:rgba(152,88,31,.10);color:var(--travel);border:1px solid rgba(152,88,31,.34)}
.btn.burn:hover{background:rgba(152,88,31,.18)}
.btn.red{background:var(--red)}
.btn.red:hover{background:#9E2F2B}
.btn.small{padding:7px 14px;font-size:.85rem}
.btn.block{display:block;width:100%}

.pill{
  display:inline-block;padding:3px 10px;border-radius:99px;font-size:.72rem;font-weight:700;
}
.pill.n5{background:rgba(63,122,70,.12);color:var(--n5)}
.pill.n4{background:rgba(53,106,156,.12);color:var(--n4)}
.pill.n3{background:rgba(178,63,90,.12);color:var(--n3)}
.pill.n2{background:rgba(111,82,160,.12);color:var(--n2)}
.pill.travel{background:rgba(152,88,31,.12);color:var(--travel)}
.pill.kana{background:rgba(42,112,121,.12);color:var(--kana)}
.pill.kanji{background:rgba(126,68,166,.12);color:var(--kanji)}

#sitefooter{margin-top:40px;padding:24px 16px;border-top:1px solid var(--border);text-align:center;color:var(--muted);font-size:.85rem;line-height:1.8}
#sitefooter a{color:var(--muted);text-decoration:none}
#sitefooter a:hover{color:var(--accent);text-decoration:underline}
.readcard .rline{padding:10px 0;border-top:1px solid var(--border)}
.readcard .rk{font-size:1.15rem;font-weight:600;line-height:1.7}
.readcard .rr{font-size:.9rem;color:var(--muted);margin-top:2px}
.readcard .rm{font-size:.92rem;color:var(--text2);margin-top:4px}
.readcard.hidemean .rm{display:none}
.annpanel{border:1px solid var(--sage);background:linear-gradient(var(--sage-soft),var(--card) 60%);padding:14px 16px}
.annhead{display:flex;justify-content:space-between;align-items:center;cursor:pointer}
.annitem{display:flex;gap:10px;align-items:flex-start;padding:11px 0 2px;border-top:1px solid var(--border);margin-top:10px}
.annitem:first-of-type{border-top:none}
.annx{background:none;border:none;color:var(--muted);font-size:.95rem;cursor:pointer;padding:2px 6px;flex-shrink:0;border-radius:8px}
.annx:hover{color:var(--red);background:var(--card2)}
.levelcard{cursor:pointer;transition:.15s}
.levelcard:hover{border-color:var(--sage);box-shadow:var(--shadow-lg)}
.lvl-badge{
  flex-shrink:0;width:58px;height:58px;border-radius:14px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:1px;
  background:linear-gradient(135deg,var(--sakura),var(--accent));color:#fff;font-size:1.4rem;line-height:1;
}
.lvl-badge span{font-size:.6rem;font-weight:800;letter-spacing:.02em}
.xpgain{color:var(--yellow);font-weight:800;font-size:1rem}
.clozeblank{display:inline-block;min-width:56px;padding:0 10px;border-bottom:2.5px dashed var(--accent);color:var(--accent);font-weight:800;text-align:center}
#aiChatBox{min-height:120px;max-height:56vh;overflow-y:auto;padding:4px 2px;margin-bottom:10px}
.ai-line{display:flex;margin-bottom:10px}
.ai-line.u{justify-content:flex-end}
.ai-bubble{max-width:86%;padding:10px 14px;line-height:1.55;font-size:.95rem}
.ai-line.u .ai-bubble{background:var(--accent);color:#fff;border-radius:14px 14px 4px 14px}
.ai-line.a .ai-bubble{background:var(--card);border:1px solid var(--border);border-radius:14px 14px 14px 4px}
.aichat-input{display:flex;gap:8px;position:sticky;bottom:8px}
.ai-help{background:var(--card2);border:1px solid var(--kanji);border-radius:10px;padding:12px;font-size:.92rem;line-height:1.65}
.avgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:6px;margin-top:6px}
.avpick{background:var(--card2);border:1.5px solid var(--border);border-radius:10px;font-size:1.4rem;padding:6px 0;cursor:pointer;transition:.12s}
.avpick:hover{border-color:var(--sage)}
.avpick.sel{border-color:var(--accent);background:var(--sage-soft);box-shadow:0 0 0 2px rgba(79,114,73,.22)}
.bggrid{display:flex;flex-wrap:wrap;gap:6px}
.bgpick{background:var(--card2);border:1.5px solid var(--border);border-radius:99px;color:var(--text);font-family:inherit;font-size:.82rem;font-weight:600;padding:6px 12px;cursor:pointer;transition:.12s}
.bgpick:hover{border-color:var(--sage)}
.bgpick.sel{border-color:var(--accent);background:var(--sage-soft)}

.kanagrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(62px,1fr));gap:8px}
.kanacell{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:8px 4px;text-align:center;transition:.12s}
.kanacell.on{border-color:var(--kana);background:rgba(42,112,121,.09)}
.kanacell .kc-char{font-size:1.5rem;font-weight:700;line-height:1.1}
.kanacell .kc-ro{color:var(--muted);font-size:.75rem;margin-top:2px}
.pill.stage{background:var(--bg2);color:var(--muted)}
.pill.due{background:rgba(143,99,13,.13);color:var(--yellow)}

.lesson-row{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:13px 16px;background:var(--card);border:1px solid var(--border);
  border-radius:12px;margin-bottom:8px;cursor:pointer;transition:.15s;
}
.lesson-row:hover{border-color:var(--sage);background:var(--card2)}
.lesson-row .lr-title{font-weight:700;font-size:.95rem}
.lesson-row .lr-sub{color:var(--muted);font-size:.78rem;margin-top:2px}
.lesson-row .lr-right{display:flex;align-items:center;gap:8px;flex-shrink:0}

.cat-header{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:15px 16px;background:var(--card2);border:1px solid var(--border);
  border-radius:12px;margin-bottom:8px;cursor:pointer;transition:.15s;
}
.cat-header:hover{border-color:var(--sage)}
.cat-title{font-weight:800;font-size:1rem}
.chev{color:var(--muted);font-size:1.3rem;transition:transform .2s;display:inline-block}
.chev.open{transform:rotate(90deg)}
.cat-body{margin:0 0 14px 10px;padding-left:8px;border-left:2px solid var(--sage-soft)}
.cat-body .lesson-row{margin-bottom:6px}

.progressbar{height:7px;background:var(--bg2);border-radius:99px;overflow:hidden;margin-top:8px}
.progressbar>div{height:100%;background:linear-gradient(90deg,var(--sage),var(--accent));border-radius:99px;transition:width .3s}
.progressbar.green>div{background:var(--green)}

.tabs{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap}
.tabs button{
  background:var(--card);border:1px solid var(--border);color:var(--muted);
  font-family:inherit;font-weight:700;font-size:.85rem;padding:9px 16px;border-radius:99px;cursor:pointer;transition:.15s;
}
.tabs button.active{background:var(--accent);border-color:var(--accent);color:#fff}
.tabs button:hover:not(.active){color:var(--text);border-color:var(--sage)}

/* grammar & vocab detail */
.gpoint{border-left:3px solid var(--sage);padding-left:14px;margin-bottom:22px}
.gpattern{font-size:1.15rem;font-weight:800;margin-bottom:6px}
.gmean{color:var(--yellow);font-weight:600;font-size:.95rem;margin-bottom:5px}
.gform{color:var(--muted);font-size:.88rem;margin-bottom:8px;background:var(--card2);padding:6px 10px;border-radius:8px;display:inline-block}
.gexpl{color:var(--text2);font-size:.92rem;line-height:1.65;margin-bottom:10px}
.gex{background:var(--card2);border-radius:10px;padding:10px 14px;margin-bottom:6px}
.gex .jp-line{font-size:1.02rem;font-weight:500}
.gex .id-line{color:var(--muted);font-size:.85rem;margin-top:3px}
.vtable{width:100%;border-collapse:collapse;font-size:.92rem}
.vtable th{color:var(--muted);text-align:left;font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;padding:8px 10px;border-bottom:1px solid var(--border)}
.vtable td{padding:9px 10px;border-bottom:1px solid var(--card2);vertical-align:top}
.vtable .vw{font-weight:700;font-size:1.05rem;white-space:nowrap}
.vtable .vr{color:var(--accent);font-size:.85rem}
.vtable .vm{color:var(--text2)}
.vtable .vp{color:var(--muted);font-size:.78rem;white-space:nowrap}

/* quiz */
.quizwrap{max-width:640px;margin:0 auto}
.quizcard{
  background:var(--card);border:1px solid var(--border);border-radius:18px;
  padding:34px 24px;text-align:center;box-shadow:var(--shadow-lg);margin-bottom:16px;
  min-height:220px;display:flex;flex-direction:column;justify-content:center;align-items:center;
}
.quizcard .qtype{color:var(--muted);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px}
.quizcard .qmain{font-size:2.2rem;font-weight:800;line-height:1.35}
.quizcard .qmain.small{font-size:1.25rem;font-weight:600}
.quizcard .qsub{color:var(--muted);margin-top:10px;font-size:.95rem}
.quizcard .qanswer{margin-top:18px;padding-top:18px;border-top:1px dashed var(--border);width:100%}
.qopts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.qopts button{
  background:var(--card);border:1.5px solid var(--border);color:var(--text);border-radius:12px;
  font-family:inherit;font-size:.95rem;font-weight:600;padding:14px 12px;cursor:pointer;transition:.12s;
}
.qopts button:hover{border-color:var(--sage);background:var(--card2)}
.qopts button.correct{background:rgba(63,122,70,.14);border-color:var(--green)}
.qopts button.wrong{background:rgba(185,59,54,.12);border-color:var(--red)}
.gradebtns{display:flex;gap:10px;justify-content:center}
.quizmeta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:.85rem;margin-bottom:12px}

/* kaiwa */
.dlg-line{display:flex;gap:12px;margin-bottom:12px;align-items:flex-start}
.dlg-line .spk{
  flex-shrink:0;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:.85rem;background:var(--accent);color:#fff;
}
.dlg-line.spk-B .spk{background:var(--pink)}
.dlg-line.spk-C .spk{background:var(--yellow);color:#fff}
.dlg-bubble{background:var(--card);border:1px solid var(--border);border-radius:4px 14px 14px 14px;padding:10px 14px;flex:1}
.dlg-bubble .jp-line{font-size:1.05rem;font-weight:500;line-height:1.5}
.dlg-bubble .id-line{color:var(--muted);font-size:.85rem;margin-top:4px}
.dlg-bubble .hidden-line{
  background:#E3DACB;border-radius:6px;color:transparent;cursor:pointer;user-select:none;
}
.dlg-bubble .hidden-line:hover{opacity:.75}

.searchbox{
  width:100%;background:var(--card);border:1px solid var(--border);color:var(--text);
  font-family:inherit;font-size:.95rem;padding:12px 16px;border-radius:12px;margin-bottom:14px;outline:none;
}
.searchbox:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,114,73,.14)}
.searchbar{
  display:flex;align-items:center;gap:10px;cursor:text;
  background:var(--card);border:1px solid var(--border);border-radius:12px;
  padding:13px 16px;margin-bottom:16px;transition:.15s;
}
.searchbar:hover{border-color:var(--sage)}
.searchbar .ph{color:var(--muted);font-size:.92rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.backlink{color:var(--accent);cursor:pointer;font-weight:700;font-size:.88rem;margin-bottom:14px;display:inline-block}
.backlink:hover{text-decoration:underline}

.stagegrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:10px}
.stagebox{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:12px;text-align:center}
.stagebox .n{font-size:1.4rem;font-weight:800}
.stagebox .l{color:var(--muted);font-size:.72rem;font-weight:700;text-transform:uppercase}

.toast{
  position:fixed;bottom:20px;left:50%;transform:translateX(-50%);
  background:var(--text);border:1px solid var(--text);color:#fff;
  padding:12px 22px;border-radius:12px;font-weight:600;font-size:.9rem;z-index:99;
  box-shadow:var(--shadow-lg);animation:fadein .2s;
}
@keyframes fadein{from{opacity:0;transform:translateX(-50%) translateY(8px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}

textarea.iobox{
  width:100%;min-height:110px;background:var(--card2);border:1px solid var(--border);
  color:var(--text);border-radius:10px;font-family:monospace;font-size:.8rem;padding:10px;margin:8px 0;
}

.empty{color:var(--muted);text-align:center;padding:40px 10px;font-size:.95rem}

@media(max-width:640px){
  html{font-size:15px}
  #app{padding:0 11px 90px}
  #topbar{flex-direction:column;gap:6px;padding:10px 2px 6px}
  .brand-name{font-size:1rem}
  .brand-mark{width:26px;height:26px}
  #mainnav{width:100%;justify-content:flex-start;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:2px}
  #mainnav::-webkit-scrollbar{display:none}
  #mainnav button{flex:0 0 auto;padding:6px 10px;font-size:1.1rem;flex-direction:column;display:flex;align-items:center;gap:1px;line-height:1.1;min-height:44px;justify-content:center}
  #mainnav button span{font-size:.58rem;font-weight:700;letter-spacing:.01em}
  .card{padding:15px}
  h1{font-size:1.35rem}
  .grid3{grid-template-columns:1fr 1fr}
  .qopts{grid-template-columns:1fr}
  .quizcard .qmain{font-size:1.7rem}
  .vtable .vp{display:none}
}