/* ===== JLPT app — he Muji. MOI mau di qua token; cam hex roi trong template. ===== */
/* Noto Serif (self-host, subset latin+vietnamese) — chi palette Naruto dung; du dau tieng Viet moi nen */
@font-face{font-family:"NotoSerifVN";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/noto-serif-400-vietnamese.woff2") format("woff2");unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:"NotoSerifVN";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/noto-serif-400-latin.woff2") format("woff2");unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:"NotoSerifVN";font-style:normal;font-weight:700;font-display:swap;src:url("fonts/noto-serif-700-vietnamese.woff2") format("woff2");unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
@font-face{font-family:"NotoSerifVN";font-style:normal;font-weight:700;font-display:swap;src:url("fonts/noto-serif-700-latin.woff2") format("woff2");unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
:root{
  --bg:#F6F3EC; --surface:#FDFCF9; --ink:#33312C; --muted:#6B6659; --line:#E5E0D5;
  --accent:#A44E5E; --on-accent:#FDFCF9; --ok:#5B7358; --streak:#D0808E;
  /* mau cham diem SRS — CO DINH moi theme (nut Hoc lai/Kho/Tot/De + vien vuot) */
  --grade-again:#B34A44; --grade-hard:#E77B49; --grade-good:#A1CB35; --grade-easy:#769826;
  /* hong hien thi (trang chu Sakura) — accent giu nguyen cho toan app */
  --rose:#D98A97; --rose-deep:#C67684; --tile-bg:#F7E2E7; --tile-ink:#C47C8A;
  --btn-a:#ECB4BE; --btn-b:#E3A0AC; --btn-ink:#7C2F3B;
  --shadow-overlay:0 8px 30px rgba(0,0,0,.18);
  --nav-shadow:0 16px 38px -12px rgba(74,52,34,.18), 0 5px 14px rgba(40,30,20,.06);
  /* alias ten cu — cac cho inline style trong views.js tu len palette moi */
  --acc:var(--accent); --acc2:var(--accent); --mut:var(--muted); --bad:var(--accent);
  --warn:var(--muted); --easy:var(--ink); --card:var(--surface); --sh:none;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme=light]){
    --bg:#201E1B; --surface:#282522; --ink:#E8E4DB; --muted:#A39D90; --line:#3A3630;
    --accent:#D07E88; --on-accent:#201E1B; --ok:#8FA68C;
    --rose:#D98A97; --rose-deep:#E2AAB4; --tile-bg:#3B2E31; --tile-ink:#E3A9B4;
    --btn-a:#B26370; --btn-b:#9E5462; --btn-ink:#FCEEF0; --streak:#E0A2AD;
    --nav-shadow:0 16px 40px -12px rgba(0,0,0,.5), 0 5px 14px rgba(0,0,0,.34);
  }
}
:root[data-theme=dark]{
  --bg:#201E1B; --surface:#282522; --ink:#E8E4DB; --muted:#A39D90; --line:#3A3630;
  --accent:#D07E88; --on-accent:#201E1B; --ok:#8FA68C;
  --rose:#D98A97; --rose-deep:#E2AAB4; --tile-bg:#3B2E31; --tile-ink:#E3A9B4;
  --btn-a:#B26370; --btn-b:#9E5462; --btn-ink:#FCEEF0; --streak:#E0A2AD;
  --nav-shadow:0 16px 40px -12px rgba(0,0,0,.5), 0 5px 14px rgba(0,0,0,.34);
}
/* ===== Palette Naruto (matcha) — cong them, chi khai deltas token ===== */
:root[data-palette=naruto]{
  --bg:#F1ECDF; --surface:#F8F4EA; --ink:#41462E; --muted:#6E6E54;
  --line:#E4DECF; --accent:#87915F; --on-accent:#F7F4EC; --streak:#D08178;
  /* map token trang chu theo accent xanh — CTA dang dac, khong dinh hong (var(--accent) tu doi sang/toi) */
  --rose:color-mix(in srgb, var(--accent) 80%, var(--bg)); --rose-deep:var(--accent);
  --tile-bg:color-mix(in srgb, var(--accent) 15%, var(--surface)); --tile-ink:var(--accent);
  --btn-a:var(--accent); --btn-b:var(--accent); --btn-ink:var(--on-accent);
}
:root[data-palette=naruto][data-theme=dark]{
  --bg:#1E201A; --surface:#272A22; --ink:#E6E6DA; --muted:#9EA089;
  --line:#383B31; --accent:#A6B583; --on-accent:#1E201A; --streak:#D99C93;
}
@media (prefers-color-scheme: dark){
  :root[data-palette=naruto]:not([data-theme=light]){
    --bg:#1E201A; --surface:#272A22; --ink:#E6E6DA; --muted:#9EA089;
    --line:#383B31; --accent:#A6B583; --on-accent:#1E201A; --streak:#D99C93;
  }
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{overflow-x:hidden}
body{background:var(--bg);color:var(--ink);font-family:"Segoe UI",-apple-system,Roboto,Arial,sans-serif;min-height:100vh;font-size:15px}
.jp{font-family:"Segoe UI",-apple-system,Roboto,"Hiragino Sans","Yu Gothic UI","Yu Gothic","Meiryo","Noto Sans JP",Arial,sans-serif}
button,input,select,textarea{font-family:inherit;color:inherit}
#app{max-width:840px;margin:0 auto;padding:16px 16px 104px}
header{display:flex;align-items:center;justify-content:space-between;padding:2px 2px 14px}
header h1{font-size:18px;font-weight:700;letter-spacing:.01em}
.homeTitle{font-family:"HGS行書体","HG行書体","Yuji Syuku","Kaiti SC","STKaiti","Hiragino Mincho ProN","Yu Mincho",cursive,serif;font-size:29px;font-weight:400;letter-spacing:.05em;color:var(--rose-deep);line-height:1}
header .sub{font-size:13px;color:var(--muted)}
.hgroup{display:flex;align-items:center;min-width:0}
.backbtn{background:none;border:none;color:var(--ink);cursor:pointer;padding:11px;margin:-11px 2px -11px -13px;border-radius:10px;display:flex;align-items:center;justify-content:center}
.backbtn[hidden]{display:none}
.cdlg{position:fixed;inset:0;background:rgba(24,22,19,.38);z-index:98;display:flex;align-items:center;justify-content:center;padding:24px}
.cdlg .card{max-width:320px;width:100%;margin:0;padding:18px 18px 14px}
h2{font-size:16px;margin-bottom:10px;font-weight:700}
.card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;margin-bottom:12px}
.btn{display:inline-block;border:none;border-radius:8px;padding:12px 18px;font-size:15px;font-weight:700;cursor:pointer;background:var(--accent);color:var(--on-accent);transition:transform .06s}
.btn:active{transform:scale(.98)}
.btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn.sm{padding:8px 13px;font-size:14px}
.btn:disabled{opacity:.45;cursor:default}
select,input[type=text],input[type=password]{border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:15px;background:var(--surface);color:var(--ink);outline:none;width:100%}
select:focus,input:focus{border-color:var(--accent)}
.row{display:flex;gap:10px;align-items:center}
.row>*{flex:1}
label.lbl,.lbl{font-size:12px;color:var(--muted);font-weight:700;display:block;margin:10px 0 5px;text-transform:uppercase;letter-spacing:.08em;line-height:1.6}
/* thanh tien do — manh, mot tong */
.bar,.mini,.qbar{height:4px;background:var(--line);border-radius:4px;overflow:hidden;display:flex}
.bar i,.mini i{height:100%;background:var(--accent);opacity:.85}
.bar i+i,.mini i+i{opacity:.35}
.qbar{height:4px;margin-bottom:14px}
.qbar i{display:block;height:100%;background:var(--accent);transition:width .3s}
.legend{display:flex;gap:14px;margin-top:8px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:4px}
/* nav — icon sumi-e + vach azuki (spec 2026-07-17-he-icon-sumie) */
nav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--line);display:flex;z-index:50}
nav button{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 0 max(10px, env(safe-area-inset-bottom));background:none;border:none;font-size:11px;color:var(--muted);cursor:pointer;font-weight:600;letter-spacing:.02em}
nav button .ic{display:block;width:24px;height:24px}
nav button.on{color:var(--ink);font-weight:700;box-shadow:inset 0 2px 0 var(--accent)}
nav button.on .ic{color:var(--accent)}
@media(prefers-reduced-motion:no-preference){
  @keyframes navpop{0%{transform:scale(1)}35%{transform:scale(1.18) rotate(-4deg)}70%{transform:scale(.96) rotate(1deg)}100%{transform:scale(1)}}
  nav button.on .ic{animation:navpop .28s ease-out}
}

/* ---- Thanh tab noi (pill mem, nac 2) — chi tren dien thoai (spec 2026-07-19-thanh-tab-noi) ---- */
@keyframes navpop-soft{0%{transform:scale(1)}45%{transform:scale(1.1)}100%{transform:scale(1)}}
@media (max-width:600px){
  #app{padding:16px 16px calc(96px + env(safe-area-inset-bottom))}
  nav{
    left:0; right:0; margin-inline:auto;
    bottom:calc(12px + env(safe-area-inset-bottom));
    width:min(calc(100% - 28px), 460px);
    min-height:70px; align-items:center;
    padding:0 10px; gap:2px;
    border-top:none; border-radius:35px;
    box-shadow:var(--nav-shadow);
  }
  nav button{
    height:56px; justify-content:center;
    border-radius:22px; padding:0 2px;
    transition:background .22s ease, color .22s ease;
  }
  nav button span{max-width:100%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
  nav button.on{
    background:color-mix(in srgb, var(--accent) 8%, transparent);
    color:var(--accent); box-shadow:none;
  }
}
@media (max-width:600px) and (prefers-reduced-motion:no-preference){
  nav button.on .ic{animation:navpop-soft .3s ease-out}
}
/* trang chu Genkan */
.bignum{font-size:44px;font-weight:300;line-height:1.1;letter-spacing:-.02em}
.bignum small{font-size:13px;color:var(--muted);font-weight:400;letter-spacing:0;display:block;margin-top:4px}
.dots7{display:flex;gap:7px;justify-content:center;margin-top:12px}
.dot7{width:8px;height:8px;border-radius:50%;border:1px solid var(--line);background:transparent}
.dot7.on{background:var(--accent);border-color:var(--accent);opacity:.85}
.lrow{display:flex;justify-content:space-between;align-items:center;padding:12px 2px;border-bottom:1px solid var(--line);font-size:14.5px;cursor:pointer}
.lrow:last-child{border-bottom:none}
.lrow .sub{color:var(--muted);font-size:12.5px}
.lrow .arr{color:var(--muted);opacity:.6}
/* man Hoc — dong bo the */
.deckGroupLabel{padding:10px 2px 4px;color:var(--accent);font-size:11px;font-weight:800;letter-spacing:.09em;text-transform:uppercase}
.deckGroupLabel:first-child{padding-top:8px}
.dkrow{display:flex;align-items:center;gap:10px;padding:12px 2px;border-bottom:1px solid var(--line);cursor:pointer}
.dkrow:last-child{border-bottom:none}
.dkrow .nm{flex:1;min-width:0}
.dkrow .nm b{font-size:14.5px;font-weight:600;display:block}
.dkrow .nm span{font-size:12px;color:var(--muted)}
.dkrow .bar{flex:0 0 72px}
.dkrow .due{flex:0 0 36px;text-align:right;font-size:13px;font-weight:700;color:var(--ink)}
.dkrow .due.z{color:var(--muted);font-weight:400}
.studyPurposeTabs{display:flex;flex-wrap:nowrap;gap:8px;max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain;padding:1px 2px 5px;margin-bottom:10px;scrollbar-width:none}
.studyPurposeTabs::-webkit-scrollbar{display:none}
.studyPurposeTab{flex:0 0 auto;min-height:44px;white-space:nowrap;border:1px solid var(--line);border-radius:10px;padding:9px 13px;background:var(--surface);color:var(--muted);font-size:13.5px;font-weight:600;cursor:pointer}
.studyPurposeTab.on{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));background:color-mix(in srgb,var(--accent) 10%,var(--surface));color:var(--accent);font-weight:700}
.studyPurposeTab:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.studyListTitle{font-size:12px;color:var(--muted);font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:2px 2px 6px}
.studyPurposePanel{padding:4px 14px}
.studyEmpty{padding:22px 2px;text-align:center;color:var(--muted);font-size:13.5px}
/* flashcard */
#fcWrap{position:relative;perspective:1200px}
#fcWrap .face{touch-action:pan-y}
.fcard{position:relative;min-height:480px;border-radius:10px;cursor:pointer;transform-style:preserve-3d;transition:transform .3s ease-out}
.fcard.flip{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--surface);border:1px solid var(--line);border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:22px;overflow-y:auto}
.vocabCardWrap .face{padding-bottom:84px}
.vocabCardWrap .face.front{padding-top:84px}
.face.back{transform:rotateY(180deg);justify-content:flex-start}
.bigword{font-size:46px;font-weight:700;text-align:center;line-height:1.25}
.face.front .bigword{font-size:69px}
.reading{font-size:28px;color:var(--accent);font-weight:600;margin-bottom:4px}
.meaning,.face .meaning{font-size:30px;font-weight:700;text-align:center;margin:6px 0 12px}
.hintTap{position:absolute;left:16px;right:16px;bottom:12px;text-align:center;font-size:13px;line-height:1.5;color:var(--muted)}
.exbox{width:100%;border-top:1px solid var(--line);padding-top:10px;margin-top:4px}
.ex{margin-bottom:10px}
.ex .j{font-size:15.5px;line-height:1.55}
.ex .v{font-size:13px;color:var(--muted);line-height:1.45;margin-top:2px}
#fcWrap .ex .j{font-size:23px}
#fcWrap .ex .v{font-size:19px}
.gtxt{font-size:15.5px;line-height:1.65;color:var(--ink);margin:7px 0;text-align:left;width:100%}
#fcWrap .gtxt{font-size:20px}
.gst{width:100%;background:var(--bg);border-left:2px solid var(--accent);border-radius:6px;padding:8px 11px;font-size:16px;font-weight:700;margin:7px 0;text-align:left}
#fcWrap .gst{font-size:21px}
.tagLesson{position:absolute;top:12px;left:14px;font-size:11px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.cardActions{position:absolute;right:16px;bottom:18px;display:flex;align-items:center;gap:10px;z-index:2}
.cardActions .fav{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:50%;background:none;font-size:24px;padding:0}
.spk{background:var(--bg);border:1px solid var(--line);border-radius:50%;width:44px;height:44px;font-size:15px;cursor:pointer;color:var(--muted);display:flex;align-items:center;justify-content:center}
.spk svg{width:22px;height:22px}
/* Loa trong cau vi du: KHONG vien/nen (vong tron tho, chen giua dong chu) — chi con icon.
   Van giu o vuong 44x44 de dat chuan vung cham, chi la o do trong suot. */
.exampleSpeaker{display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;width:44px;height:44px;margin-left:4px;padding:0;border:0;border-radius:50%;background:none;color:var(--muted);cursor:pointer;line-height:0}
.exampleSpeaker svg{width:24px;height:24px}
.exampleSpeaker:focus-visible,.spk:focus-visible,.cardActions .fav:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.hvtag{display:inline-block;border:1px solid var(--line);color:var(--ink);border-radius:6px;padding:3px 12px;font-size:14px;font-weight:700;letter-spacing:.06em;margin-top:6px}
.usetag{display:inline-block;border:1px dashed var(--line);color:var(--mut);border-radius:6px;padding:2px 10px;font-size:13px;margin-top:6px;margin-left:6px}
/* 4 nut cham diem NGANG HANG — gach mau day (dai accent->ok: am=can on, mat=da thuoc);
   nen trung tinh, gach mong nen luc keo yeu -> khong lech lich SRS. Mau nen chi loe luc :active. */
.grade{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}
.freeReviewGrade{grid-template-columns:repeat(2,minmax(0,1fr))}
.freeReviewGrade button{min-height:52px}
.grade button{border:1px solid var(--line);border-radius:8px;padding:14px 4px;font-size:16px;font-weight:700;color:var(--ink);cursor:pointer;background:var(--surface)}
.grade small{display:block;font-weight:500;font-size:11.5px;color:var(--muted);margin-top:2px}
.gAgain{box-shadow:inset 0 -3px 0 var(--grade-again)}
.gHard{box-shadow:inset 0 -3px 0 var(--grade-hard)}
.gGood{box-shadow:inset 0 -3px 0 var(--grade-good)}
.gEasy{box-shadow:inset 0 -3px 0 var(--grade-easy)}
.gAgain:active{background:color-mix(in srgb, var(--grade-again) 18%, var(--surface))}
.gHard:active{background:color-mix(in srgb, var(--grade-hard) 18%, var(--surface))}
.gGood:active{background:color-mix(in srgb, var(--grade-good) 18%, var(--surface))}
.gEasy:active{background:color-mix(in srgb, var(--grade-easy) 18%, var(--surface))}
.sesshead{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:14px;color:var(--muted)}
.counts b{padding:0;border-radius:0;font-size:13px;background:none}
.cNew{color:var(--ink)}.cDue{color:var(--accent)}
/* quiz */
.qword{font-size:36px;font-weight:700;text-align:center;margin:14px 0 4px;line-height:1.3}
.qmeta{text-align:center;color:var(--muted);font-size:14px;margin-bottom:14px}
.opts{display:flex;flex-direction:column;gap:9px}
.opt{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:14px 15px;font-size:16px;text-align:left;cursor:pointer;font-weight:600;transition:border .12s;line-height:1.6}
.opt.right{border-color:var(--ok);background:color-mix(in srgb, var(--ok) 10%, var(--surface))}
.opt.wrong{border-color:var(--accent);background:color-mix(in srgb, var(--accent) 10%, var(--surface))}
.opts.qz{display:grid;gap:10px}
.opts.qz.two{grid-template-columns:1fr 1fr}
@media(max-width:560px){.opts.qz.two{grid-template-columns:1fr}}
.opts.qz .opt{display:flex;align-items:center;gap:12px}
.opts.qz .opt.jp{font-size:17.5px}
.kbdn{flex:0 0 27px;height:27px;border-radius:6px;background:var(--bg);color:var(--muted);font-size:13.5px;font-weight:700;display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}
.opt.right .kbdn{background:var(--ok);color:var(--surface);border-color:var(--ok)}
.opt.wrong .kbdn{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.kbHint{display:none}
@media(min-width:700px){.kbHint{display:block}}
/* tra cuu */
.witem{border-bottom:1px solid var(--line);padding:11px 2px;cursor:pointer}
.witem:last-child{border:none}
.wtop{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.wword{font-size:19px;font-weight:700}
.wread{font-size:13.5px;color:var(--accent);font-weight:600}
.wmean{font-size:14px;color:var(--muted);margin-top:2px}
.wex{display:none;margin-top:8px;background:var(--bg);border-radius:8px;padding:10px}
.witem.open .wex{display:block}
.wstate{margin-left:auto;font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);white-space:nowrap;line-height:1.6}
.wdot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:4px;vertical-align:1px;border:1px solid var(--muted)}
.wdot.new{background:var(--ink);border-color:var(--ink)}
.wdot.mature{background:var(--muted)}
.fav{background:none;border:none;font-size:17px;color:var(--line);cursor:pointer;padding:0 2px}
.fav.on{color:var(--accent)}
/* chon bai */
.lessongrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(102px,1fr));gap:8px}
.lcell{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:10px;cursor:pointer;text-align:center}
.lcell b{font-size:13.5px}
.lcell .m{font-size:11px;color:var(--muted);margin:3px 0 6px}
/* man xong phien */
.done{text-align:center;padding:36px 10px}
.done .big{font-size:44px;font-weight:300;color:var(--accent)}
.done h3{font-size:19px;margin:10px 0 6px}
.done p{color:var(--muted);font-size:14px;margin-bottom:16px}
.switch{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink);font-weight:600;cursor:pointer;user-select:none}
.switch input{accent-color:var(--accent);width:17px;height:17px}
.toast{position:fixed;top:14px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--bg);border-radius:99px;padding:9px 18px;font-size:14px;z-index:99;opacity:0;transition:opacity .25s;pointer-events:none;box-shadow:var(--shadow-overlay)}
.toast.show{opacity:.97}
/* tab chu + chip */
.tabs2{display:flex;gap:18px;border-bottom:1px solid var(--line);margin-bottom:12px}
.tabs2 button{background:none;border:none;padding:8px 2px;font-size:15px;color:var(--muted);cursor:pointer;font-weight:600}
.tabs2 button.on{color:var(--ink);font-weight:700;box-shadow:inset 0 -2px 0 var(--accent)}
.chips{display:flex;gap:6px;overflow-x:auto;margin-bottom:12px;padding-bottom:3px}
.chip{border:1px solid var(--line);border-radius:99px;padding:5px 13px;font-size:13px;color:var(--muted);white-space:nowrap;background:var(--surface);cursor:pointer;flex:0 0 auto}
.chip.on{background:var(--ink);border-color:var(--ink);color:var(--bg);font-weight:600}
.deckTabs{display:flex;gap:6px;margin-bottom:12px;flex-wrap:nowrap;overflow-x:auto;padding-bottom:3px}
.deckTab{flex:0 0 auto;white-space:nowrap;border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:6px 13px;font-size:13.5px;font-weight:600;cursor:pointer;color:var(--muted)}
.deckTab.on{background:var(--ink);border-color:var(--ink);color:var(--bg)}
/* Hán tự roadmap */
.kanji-roadmap,.kanji-lessons,.kanji-search{display:flex;flex-direction:column;gap:12px}
.kanji-hero{display:flex;flex-direction:column;gap:10px}
.kanji-hero h2,.kanji-detail h2{margin-bottom:2px}
.kanji-hero-copy{font-size:13.5px;color:var(--muted);line-height:1.5}
.kanji-searchbar{display:flex;gap:8px;align-items:center}
.kanji-searchbar input{min-width:0}
.kanji-levels{padding:6px 14px}
.kanji-level-row{padding:13px 2px;border-bottom:1px solid var(--line);cursor:pointer}
.kanji-level-row:last-child{border-bottom:none}
.kanji-level-head{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:baseline;margin-bottom:8px}
.kanji-level-head b{font-size:16px}
.kanji-level-head span,.kanji-level-head em{font-size:12.5px;color:var(--muted);font-style:normal}
.kanji-progress-label{font-size:11px;color:var(--muted);font-weight:700;text-transform:uppercase;margin:7px 0 4px}
.kanji-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.kanji-lesson-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.kanji-lesson-tools h2{margin:0 auto 0 0}
.kanji-lesson-row{border-bottom:1px solid var(--line);padding:12px 2px}
.kanji-lesson-row:last-child{border-bottom:none}
.kanji-lesson-title{border:0;background:none;color:var(--ink);font-weight:700;padding:0;margin:0 0 8px;display:flex;width:100%;justify-content:space-between;cursor:pointer}
.kanji-lesson-title span{color:var(--muted);font-weight:600}
.kanji-char-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:7px;margin-top:9px}
.kanji-char-chip{height:42px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:22px;cursor:pointer}
.kanji-card{min-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:12px}
.kanji-card-kind{font-size:12px;color:var(--muted);font-weight:800;text-transform:uppercase}
.kanji-big{font-size:82px;line-height:1}
.kanji-kv{display:flex;align-items:baseline;justify-content:center;gap:9px;flex-wrap:wrap}
.kanji-kv span{font-size:12px;color:var(--muted);font-weight:800;text-transform:uppercase}
.kanji-kv b{font-size:17px}
.kanji-meaning{font-size:18px;line-height:1.5}
.kanji-mnemonic{font-size:14px;color:var(--muted);line-height:1.5;margin:0}
.kanji-compounds{list-style:none;padding:0;margin:4px 0 0;display:grid;gap:7px;width:100%;max-width:520px;text-align:left}
.kanji-compounds li{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:8px 10px}
.kanji-compounds b.jp{font-size:22px;line-height:1.55}   /* chu Han to de furigana (rt .5em) doc ro */
.kanji-compounds em{font-size:13px;color:var(--muted);font-style:normal}
.kanji-session-compounds{max-width:none;margin-top:10px}
.kanji-session-compounds li{background:var(--bg)}
.mini-spk{width:auto;height:auto;border-radius:7px;padding:4px 8px;font-size:12px}
/* loa tran kieu vi du tu vung: chi icon, khong vien pill */
.kspk{background:none;border:0;padding:6px;margin:-6px 0;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;line-height:0;justify-self:end}
.kspk svg{width:20px;height:20px}
.kanji-detail{text-align:center;max-width:600px;margin-inline:auto}   /* thu gon man chi tiet, can giua tren desktop */
.kanji-deep-section{margin-top:18px;text-align:left;border-top:1px solid var(--line);padding-top:14px}
.kanji-deep-section .kanji-compounds{max-width:none}   /* tu ghep lap day cot 600, khong hug trai */
.kanji-examples{display:grid;gap:8px;margin-top:10px}
.kanji-empty{color:var(--muted);font-size:14px;text-align:center;padding:12px}
.kanji-level-row:focus-visible,.kanji-lesson-title:focus-visible,.kanji-char-chip:focus-visible,.mini-spk:focus-visible,.kspk:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
/* de luyen */
.testgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.tcell{border:1px solid var(--line);border-radius:8px;padding:10px 11px;cursor:pointer;display:flex;flex-direction:column;gap:3px;background:var(--surface)}
.tcell b{font-size:13px;line-height:1.4;font-weight:600}
.tcell span{color:var(--muted);font-size:12px}
.tcell.ok{border-color:var(--accent)}
.tcell.ok span{color:var(--accent);font-weight:600}
.drow{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.drow:last-child{border-bottom:none}
.drow span{font-size:14px !important}
.texp{background:var(--bg);border-left:2px solid var(--accent);border-radius:6px;padding:10px 12px;font-size:15px;line-height:1.75;margin-top:12px;white-space:pre-line}
.zoom-passage{white-space:pre-line}
u{text-underline-offset:4px;text-decoration-thickness:1.5px;text-decoration-color:var(--accent)}
.ttimer{font-weight:700;color:var(--ink)}
.ttimer.low{color:var(--accent)}
/* tu dien cham-tu */
.tapw{border-bottom:1px dashed var(--line);cursor:pointer}
#dictpop{display:none;position:fixed;left:50%;transform:translateX(-50%);bottom:74px;width:min(560px,94vw);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:13px 15px;z-index:90;box-shadow:var(--shadow-overlay)}
/* cai dat */
.setrow{display:flex;justify-content:space-between;align-items:center;padding:12px 2px;border-bottom:1px solid var(--line);font-size:14.5px}
.setrow:last-child{border-bottom:none}
.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg button{background:var(--surface);border:none;padding:7px 13px;font-size:13px;color:var(--muted);cursor:pointer}
.seg button.on{background:var(--ink);color:var(--bg);font-weight:600}
/* hang dan drill-down Cai dat (issue #6) */
.navrow{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:15px 16px;margin-bottom:10px;cursor:pointer}
.navrow:active{transform:scale(.99)}
.navrow .nr-ic{font-size:18px;flex:none;width:24px;text-align:center;opacity:.85}
.navrow .nr-ic svg{display:block;margin:0 auto}
.navrow .nr-main{flex:1;min-width:0}
.navrow .nr-title{font-size:15px;font-weight:700}
.navrow .nr-sub{font-size:12.5px;color:var(--muted);margin-top:2px;line-height:1.4}
.navrow .nr-chev{color:var(--muted);font-size:22px;flex:none;line-height:1}
/* furigana */
ruby{ruby-position:over}
rt{font-size:.5em;color:var(--muted);font-weight:500}
body.furoff rt{display:none}
/* Mat truoc flashcard dung co rt nho hon; hien/an van theo body.furoff toan cuc. */
/* line-height rong hon de furigana (rt) co cho o TREN, khong bi ep chong len kanji:
   mat truoc 69px + rt 27.6px ~ 97px > line box 1.25*69=86px -> tran chong. 1.7 cho ~117px. */
.fword{line-height:1.7}
.fword rt{font-size:.4em}
/* Doc hieu N2 — layout passage + ban dich; furigana theo cong tac toan cuc. */
.dhpass{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-size:15.5px;line-height:2;margin-bottom:6px;max-height:300px;overflow-y:auto}
.dhctl{display:flex;gap:8px;margin:0 0 8px}
.dhbtn{font:inherit;font-size:12.5px;padding:5px 11px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--mut);cursor:pointer}
.dhbtn.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.dhtrans{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-size:14.5px;line-height:1.7;margin-bottom:8px}
/* dich cau hoi: dong phu de duoi cau hoi (khong khung) */
.dhtrans.dht-q{background:none;border:0;border-radius:0;padding:0;margin:0 0 12px;font-size:14.5px;font-weight:500;color:var(--accent);line-height:1.55}
/* dich dap an: dong phu mo trong nut .opt */
.opt .dhtrans.dht-o{display:block;background:none;border:0;border-radius:0;padding:7px 0 0;margin:0;font-size:13.5px;font-weight:400;color:var(--mut);line-height:1.5}
body:not(.furoff) .ex .j{line-height:2.1}
/* man rong — khong dung body zoom */
@media(min-width:1500px){ #app{max-width:960px} body{font-size:16px} }
@media(max-width:480px){
  .face.front .bigword{font-size:52px}.reading{font-size:23px}
  #fcWrap .ex .j{font-size:19px}#fcWrap .ex .v{font-size:15.5px}.face .meaning{font-size:24px}
  .bigword{font-size:38px}.qword{font-size:27px}.opt{font-size:15.5px;padding:13px}
  .wword{font-size:19px}.tcell b{font-size:13px}.deckTab{font-size:13px;padding:6px 11px}
  .kanji-searchbar{flex-direction:column;align-items:stretch}
  .kanji-level-head{grid-template-columns:auto 1fr}
  .kanji-level-head em{grid-column:1 / -1}
  .kanji-char-grid{grid-template-columns:repeat(auto-fill,minmax(38px,1fr));gap:6px}
  .kanji-char-chip{height:38px;font-size:20px}
  .kanji-big{font-size:68px}
  .kanji-card{min-height:360px}
  .kanji-compounds li{grid-template-columns:1fr;gap:4px}
}
/* opening enso tu ve (spec 2026-07-17-trang-chu-opening-background) */
#opening{position:fixed;inset:0;z-index:100;background:var(--bg);display:flex;align-items:center;justify-content:center;animation:opFade .4s ease 1.6s forwards}
#opening .op-ring{stroke-dasharray:1;stroke-dashoffset:1;animation:opDraw .9s ease-out .1s forwards}
#opening .op-moji{opacity:0;transform-origin:center;animation:opMoji .4s ease-out 1s forwards}
@keyframes opDraw{to{stroke-dashoffset:0}}
@keyframes opMoji{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}
@keyframes opFade{to{opacity:0;visibility:hidden;pointer-events:none}}
/* cau quote trang chu */
.homequote{position:relative;z-index:1;max-width:330px;margin:22px auto 6px;padding:0 10px;text-align:center;font-style:italic;font-size:13.5px;line-height:1.65;color:var(--muted);opacity:.92}
/* ===== Trang chu Sakura moi (home-scoped, khop mockup) — khong dung class chung ===== */
.homeTitle::after{content:"";display:inline-block;width:.66em;height:.66em;margin-left:.32em;vertical-align:-.05em;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='-14 -14 28 28'%3E%3Cg fill='%23E79FAE'%3E%3Cellipse cx='0' cy='-9' rx='5.4' ry='8.6'/%3E%3Cellipse cx='9' cy='-2' rx='5.4' ry='8.6' transform='rotate(72 9 -2)'/%3E%3Cellipse cx='5.6' cy='9' rx='5.4' ry='8.6' transform='rotate(144 5.6 9)'/%3E%3Cellipse cx='-5.6' cy='9' rx='5.4' ry='8.6' transform='rotate(216 -5.6 9)'/%3E%3Cellipse cx='-9' cy='-2' rx='5.4' ry='8.6' transform='rotate(288 -9 -2)'/%3E%3C/g%3E%3Ccircle r='2.6' fill='%23F0CDD5'/%3E%3C/svg%3E") center/contain no-repeat}
.home-today{position:relative;overflow:hidden}
.home-deco{position:absolute;top:0;right:0;width:118px;pointer-events:none;z-index:1}
.home-today .bignum{color:var(--rose);font-weight:300}
.home-today .bar{height:6px;background:color-mix(in srgb,var(--line) 65%,var(--bg))}
.home-today .bar i{background:linear-gradient(90deg,var(--rose),var(--rose-deep));opacity:1}
.home-today .dot7{width:9px;height:9px}
.home-today .dot7.on{background:var(--rose);border-color:var(--rose);opacity:1}
.hlbl{display:flex;align-items:center;justify-content:center;gap:7px;margin:0 0 6px;font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--rose-deep)}
.hlbl svg{width:13px;height:13px;flex:0 0 auto;fill:currentColor}
.hcta{margin-top:16px;width:100%;border:none;border-radius:18px;padding:14px 16px;cursor:pointer;background:linear-gradient(180deg,var(--btn-a),var(--btn-b));color:var(--btn-ink);display:flex;align-items:center;justify-content:center;gap:11px;transition:transform .06s;box-shadow:0 8px 20px -8px color-mix(in srgb,var(--rose-deep) 65%,transparent)}
.hcta:active{transform:scale(.98)}
.hcta .play{width:30px;height:30px;flex:0 0 auto;border-radius:50%;background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center}
.hcta .play svg{width:13px;height:13px;fill:var(--rose-deep);margin-left:2px}
.hcta .t1{display:block;font-size:17px;font-weight:700;line-height:1.2}
.hcta .t2{display:block;font-size:12px;font-weight:500;opacity:.72;margin-top:2px}
.hrow{display:flex;align-items:center;gap:14px;padding:13px 2px;border-bottom:1px solid var(--line);cursor:pointer}
.hrow:last-child{border-bottom:none}
.hrow .tile{width:44px;height:44px;flex:0 0 auto;border-radius:14px;background:var(--tile-bg);color:var(--tile-ink);display:flex;align-items:center;justify-content:center}
.hrow .tile svg{width:23px;height:23px}
.hrow .tile .kana{font-size:20px;font-weight:700;line-height:1}
.hrow .lmain{flex:1;min-width:0}
.hrow .lmain .tt{display:block;font-size:15px;font-weight:700;color:var(--ink)}
.hrow .lmain .ss{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
.hrow .arr{margin-left:auto;color:var(--muted);opacity:.55;font-size:20px}
/* tranh nen son lam - chi trang chu */
.homeart{position:fixed;left:0;right:0;bottom:0;width:100%;height:280px;z-index:-1;pointer-events:none}
/* ===== Naruto — be mat: card bo tron, nav pill, hat bot matcha, tranh trang chu ===== */
:root[data-palette=naruto] .card{position:relative;overflow:hidden;border-radius:22px;border-color:transparent;box-shadow:0 3px 14px rgba(70,70,45,.06),0 1px 3px rgba(70,70,45,.05)}
:root[data-palette=naruto] nav{left:12px;right:12px;bottom:12px;border-top:none;border-radius:26px;box-shadow:0 10px 26px -8px rgba(60,60,40,.2),0 2px 6px rgba(60,60,40,.08)}
:root[data-palette=naruto] #app{position:relative}
:root[data-palette=naruto] .homeart{display:none}
:root[data-palette=naruto] .homeTitle::after{display:none}
:root[data-palette=naruto] body{font-family:"NotoSerifVN",Cambria,Georgia,"Times New Roman",serif}
:root[data-palette=naruto] .bignum{font-variant-numeric:lining-nums;letter-spacing:0}
:root[data-palette=naruto]::after{content:"";position:fixed;inset:0;z-index:60;pointer-events:none;background-image:url("img/theme/naruto-grain.png");background-size:118px;mix-blend-mode:overlay;opacity:.56}
:root[data-palette=naruto][data-theme=dark]::after{opacity:.44}
@media (prefers-color-scheme: dark){:root[data-palette=naruto]:not([data-theme=light])::after{opacity:.44}}
.nrt-bowl{position:absolute;top:8px;right:6px;width:108px;pointer-events:none;z-index:1}
.nrt-brush{position:absolute;top:2px;right:-8px;width:232px;height:118px;pointer-events:none;z-index:0}
.nrt-enso{position:absolute;top:-12px;right:-10px;width:120px;height:106px;pointer-events:none;z-index:0}
.nrt-bamboo{position:fixed;right:0;bottom:74px;width:116px;opacity:.97;pointer-events:none;z-index:0}
:root[data-palette=naruto][data-theme=dark] .nrt-bowl,:root[data-palette=naruto][data-theme=dark] .nrt-bamboo{display:none}
@media (prefers-color-scheme: dark){:root[data-palette=naruto]:not([data-theme=light]) .nrt-bowl,:root[data-palette=naruto]:not([data-theme=light]) .nrt-bamboo{display:none}}
/* chuyen dong: 4 loai duy nhat; ton trong reduced-motion */
@media (prefers-reduced-motion: reduce){
  .fcard{transition:none}
  *{transition:none !important;animation:none !important}
  #opening{display:none}
}
/* ---- Shadowing ---- */
.shctl{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:9px}
.shbar{position:relative;height:30px;border-radius:8px;background:var(--line);overflow:hidden;margin-top:4px}
.shbar>.ab{position:absolute;top:0;bottom:0;background:var(--accent);opacity:.16}
.shbar>.head{position:absolute;top:0;bottom:0;width:2px;background:var(--accent)}
.shline{padding:5px 0;font-size:16.5px;line-height:1.9}
.shline .sp{display:inline-block;min-width:24px;font-weight:800;color:var(--mut);font-size:12px}
.shvi{color:var(--mut);font-size:13.5px;padding-left:24px;line-height:1.5}
.shhide{color:var(--mut);font-size:13.5px;text-align:center;padding:18px 0}
.btn.rec{background:var(--accent);color:var(--on-accent)}
/* ---- Hover: CHI cho thiet bi co con tro. Dung viet :hover ngoai khoi nay ---- */
/* Cam ung khong co con tro de roi di => WebKit giu :hover o phan tu duoi diem cham
   cuoi. Doi noi dung xong, phan tu moi roi vao toa do do thua huong hover: bam
   "Bat dau" -> dap an cua cau 1 hien vien accent nhu da duoc chon san.
   Rang buoc boi tools/check-hover.mjs. */
@media (hover:hover){
  .backbtn:hover{color:var(--accent)}
  .opt:not(:disabled):hover{border-color:var(--accent)}
  .tapw:hover{background:var(--bg)}
}

/* Setup học Hán tự — thêm mới cho màn cấp */
.kanji-setup h2{margin:0 0 10px}
.kanji-setup-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:14px}

/* ===== Báo song ngữ ===== */
.bsitem{cursor:pointer}
.bspair{padding:11px 0;border-bottom:1px solid var(--line)}
.bspair:last-child{border-bottom:none}
.bsjp{font-size:16px;line-height:1.95;cursor:pointer}
.bsjp ruby rt{font-size:.62em;color:var(--muted)}
.bsspk{color:var(--muted);cursor:pointer;font-size:14px;white-space:nowrap}
.bsvi{font-size:13.5px;color:var(--muted);line-height:1.55;margin-top:6px;padding:8px 11px;background:var(--bg);border-left:2px solid var(--accent);border-radius:6px}
.bsvocab{padding:9px 0;border-bottom:1px solid var(--line)}
.bsvocab:last-child{border-bottom:none}
.bsvocab .w{font-size:16px}
.bsvocab .wr{color:var(--accent);font-weight:700;font-size:13px;margin-left:7px}
.bsvocab .m{font-size:13.5px;color:var(--muted);margin-top:2px}

/* Bao loi / Gop y */
.report-btn{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:none;border:1px solid transparent;border-radius:50%;cursor:pointer;font-size:20px;opacity:.6;padding:0;line-height:1}
.report-btn:hover{opacity:1}
.report-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.report-ov{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;z-index:9999;padding:18px}
.report-modal{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:16px;padding:20px;max-width:420px;width:100%;box-shadow:0 12px 40px rgba(0,0,0,.3)}
.report-modal h2{margin:0 0 10px;font-size:18px}
.report-ctx{font-size:13px;color:var(--muted)}
/* select/textarea nam TREN --surface nen doi nen ve --bg cho co tuong phan (textarea khong nam trong nhom form chung) */
.report-modal select{background:var(--bg)}
.report-modal textarea{width:100%;box-sizing:border-box;border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:15px;background:var(--bg);color:var(--ink);outline:none;resize:vertical}
.report-modal textarea:focus{border-color:var(--accent)}
.report-acts{display:flex;gap:8px;margin-top:12px}
/* Nut bao loi goc tren-PHAI, dung chung cho ca the Tu vung/Ngu phap va Han tu.
   OVERLAY trong #fcWrap (anh em cua .fcard), GIONG .cardActions — KHONG dat trong .face:
   .fcard.flip xoay 180deg khong counter-rotate, nen ban trong .face mat truoc bi soi guong
   sang goc TRAI va tren WebKit/Chromium mobile con lo xuyen backface thanh icon ma.
   Nam ngoai vung cuon cua .face nen cung khong troi di khi cuon mat sau. */
.report-corner{position:absolute;top:10px;right:10px;z-index:2}

/* Added for Llama explanations */
.texp { white-space: pre-wrap; line-height: 1.6; padding: 10px; background-color: var(--bg-hover); border-radius: 8px; }

/* ==== Luyện viết Kanji v2 — màn luyện full-screen (.kw-screen) ==== */
:root{ --kw-outline:#C9BFAF; --kw-outline-faint:#E3DCCE; --kw-wrong:#BE4438; }
[data-theme="dark"]{ --kw-outline:#5A5348; --kw-outline-faint:#3D3831; --kw-wrong:#E0705F; }
/* theme=auto: data-theme rong -> phai co ban media query nhu moi token dark khac trong file nay */
@media (prefers-color-scheme: dark){
  :root:not([data-theme=light]){ --kw-outline:#5A5348; --kw-outline-faint:#3D3831; --kw-wrong:#E0705F; }
}
/* z-index 55: tren nav(50), duoi grain Naruto(60)/dictpop(90)/toast(99) de theme + toast van phu len */
.kw-screen{ position:fixed; inset:0; z-index:55; background:var(--bg); display:flex; flex-direction:column; }
.kw-top{ display:flex; align-items:center; gap:12px; padding:10px 12px 4px; }
.kw-x,.kw-undoBtn{ font:inherit; background:none; border:none; cursor:pointer; -webkit-tap-highlight-color:transparent;
  font-size:20px; width:40px; height:40px; border-radius:12px; color:var(--muted); flex:0 0 auto; }
.kw-x:active,.kw-undoBtn:active{ background:var(--line); }
.kw-bar{ flex:1; height:6px; border-radius:3px; background:var(--line); overflow:hidden; }
.kw-bar i{ display:block; height:100%; background:var(--accent); border-radius:3px; transition:width .25s; }
.kw-prompt{ text-align:center; padding:2px 16px 0; }
.kw-hv{ font-size:22px; font-weight:800; letter-spacing:.3px; }
.kw-hv .badge{ display:inline-block; vertical-align:3px; margin-left:8px; font-size:11px; font-weight:700;
  color:var(--muted); border:1px solid var(--line); border-radius:99px; padding:2px 8px; }
.kw-mean{ color:var(--muted); font-size:15px; margin-top:2px; }
.kw-mid{ flex:1; display:flex; align-items:center; justify-content:center; min-height:0; padding:6px; }
#kwWrap{ position:relative; touch-action:none; user-select:none; -webkit-user-select:none; }
#kwWrap.kw-shake{ animation:kwshake .16s; }
@keyframes kwshake{ 25%{transform:translateX(-5px)} 75%{transform:translateX(5px)} }
/* luoi chu thap mo nhu vo o ly de can tay khi viet tron */
#kwWrap::before,#kwWrap::after{ content:""; position:absolute; pointer-events:none; opacity:.7; }
#kwWrap::before{ left:50%; top:4%; bottom:4%; border-left:1.5px dashed var(--kw-outline-faint); }
#kwWrap::after{ top:50%; left:4%; right:4%; border-top:1.5px dashed var(--kw-outline-faint); }
#kwTarget{ position:relative; z-index:1; }
#kwTarget svg{ display:block; }
/* net mem: xuong net (medians) dau tron — DUOI target de trail luon thay */
#kwWritten{ position:absolute; inset:0; z-index:1; pointer-events:none; }
#kwWritten.kw-pulse{ animation:kwpulse .4s; }
@keyframes kwpulse{ 40%{opacity:.45} }
#kwDots{ position:absolute; inset:0; z-index:2; pointer-events:none; }
/* net SAI cua user: hien ro mau loi roi tu mo (dung thi snap, khong luu net tay) */
#kwWrong{ position:absolute; inset:0; z-index:3; pointer-events:none; }
#kwWrong path{ fill:none; stroke:var(--kw-wrong); stroke-linecap:round; stroke-linejoin:round;
  opacity:.9; transition:opacity .8s ease .4s; }
#kwWrong path.kw-fade{ opacity:0; }
.kw-result{ position:absolute; left:50%; bottom:calc(76px + env(safe-area-inset-bottom)); transform:translateX(-50%);
  z-index:5; background:var(--surface); border:1.5px solid var(--line); border-radius:99px;
  padding:8px 18px; font-weight:800; box-shadow:0 4px 18px rgba(0,0,0,.12); white-space:nowrap; }
.kw-result[hidden]{ display:none; }
.kw-result .ivl{ color:var(--muted); font-weight:600; }
.kw-bottom{ display:flex; justify-content:space-between; gap:8px; padding:6px 14px calc(10px + env(safe-area-inset-bottom)); }
.kw-btn{ font:inherit; background:none; border:none; cursor:pointer; -webkit-tap-highlight-color:transparent;
  color:var(--muted); font-weight:700; font-size:15px; padding:10px 14px; border-radius:12px; }
.kw-btn:active{ background:var(--line); }
.kw-btn[hidden],.kw-undoBtn[hidden]{ display:none; }