/* Nihongo Master — demo-derived design system (v0.2.7).
   Layout: fixed left sidebar + topbar + content column, soft green-grey
   background, white cards, red furigana accents, dark-green JLPT card. */
:root{
  --bg:#eef1ec; --bg2:#e4e9e1; --surface:#ffffff; --surface2:#f6f8f4;
  --card:#ffffff;
  --ink:#17211b; --ink2:#43534a; --muted:#75857b; --line:#dde4da;
  --accent:#d93a2b; --accent-ink:#b02a1f; --accent-soft:#fdeae7;
  --navy:#1f3a5f; --navy-soft:#e8eef6;
  --gold:#c8890a; --gold-soft:#fdf3dd;
  --green:#1d7a4c; --green-dk:#0e5c36; --green-soft:#e2f2e8;
  --teal:#0e9594; --blue:#2f6fdb; --amber:#c77f06; --red:#d93a2b;
  --ok:#1e9e57; --bad:#d93a2b;
  --shadow:0 8px 24px rgba(23,33,27,.07); --shadow-lg:0 22px 50px rgba(23,33,27,.14);
  --r-lg:22px; --r-md:15px; --r-sm:10px; --side-w:264px;
}
[data-theme="dark"]{
  --bg:#0f130f; --bg2:#0a0d0a; --surface:#1a211c; --surface2:#151b17;
  --card:#1a211c;
  --ink:#eef3ee; --ink2:#c2cec4; --muted:#8b9a8f; --line:#2b352c;
  --accent:#ff5a47; --accent-ink:#ff8a7a; --accent-soft:#3a2320;
  --navy:#7fa8d9; --navy-soft:#1d2a3d;
  --gold:#e5a91c; --gold-soft:#33270d;
  --green:#2fbf71; --green-dk:#35a266; --green-soft:#173527;
  --shadow:0 8px 24px rgba(0,0,0,.35); --shadow-lg:0 22px 50px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--green)}
.muted{color:var(--muted)}
.sub{color:var(--ink2);margin:4px 0 14px}
h2{font-size:26px;margin:6px 0 8px;letter-spacing:-.01em}
h3{font-size:18px;margin:20px 0 10px}
strong{font-weight:700}

/* ---------- shell: sidebar + main column ---------- */
.shell{display:flex;min-height:100vh}
.sidebar{position:fixed;inset:0 auto 0 0;width:var(--side-w);z-index:70;
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:20px 14px 16px;gap:4px;overflow-y:auto}
.main-col{flex:1;min-width:0;margin-left:var(--side-w);display:flex;flex-direction:column}
.content{flex:1;width:100%;max-width:1160px;margin:0 auto;padding:26px 30px 10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand .logo{width:42px;height:42px;border-radius:50%;background:var(--green);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:21px;font-weight:700;flex:0 0 auto}
.brand-tx{display:flex;flex-direction:column;line-height:1.15}
.brand-tx strong{font-size:17.5px}
.brand-tx small{font-size:10px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.side-label{font-size:10.5px;font-weight:800;letter-spacing:.12em;color:var(--muted);padding:16px 12px 6px}
.side-nav{display:flex;flex-direction:column;gap:2px}
.side-item{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:12px;
  color:var(--ink2);text-decoration:none;font-size:14.5px;font-weight:550}
.side-item:hover{background:var(--surface2);color:var(--ink)}
.side-item.on{background:var(--green-soft);color:var(--green-dk);font-weight:700}
.side-item .si-ic{width:20px;text-align:center;font-size:15px;opacity:.85;flex:0 0 auto}
.side-item.soon{color:var(--muted);cursor:default}
.soon-badge{margin-left:auto;font-size:9.5px;font-weight:800;letter-spacing:.04em;
  background:var(--gold-soft);color:var(--gold);border-radius:99px;padding:2px 7px}
.side-jlpt{margin-top:auto;background:linear-gradient(135deg,var(--green),var(--green-dk));
  color:#eafff3;border-radius:20px;padding:18px;position:relative;overflow:hidden}
.side-jlpt::after{content:"語";position:absolute;right:-6px;bottom:-30px;font-size:110px;
  font-weight:900;color:rgba(255,255,255,.10);line-height:1}
.side-jlpt .sj-t{font-size:10.5px;font-weight:800;letter-spacing:.12em;opacity:.92}
.side-jlpt .sj-big{font-size:31px;font-weight:900;line-height:1.15;margin:5px 0 3px;position:relative;z-index:1}
.side-jlpt p{margin:0;font-size:12.5px;opacity:.95;position:relative;z-index:1}
.side-user{display:flex;align-items:center;gap:10px;padding:12px 8px 2px;border-top:1px solid var(--line);margin-top:12px}
.su-av{width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}
.su-av.guest{background:var(--red)}
img.su-av-img{object-fit:cover;background:var(--surface2)}
.su-meta{display:flex;flex-direction:column;line-height:1.2;min-width:0;flex:1}
.su-meta strong{font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.su-meta small{font-size:11.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- topbar ---------- */
.topbar{position:sticky;top:0;z-index:60;display:flex;align-items:center;gap:14px;
  padding:14px 30px;background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.top-brand{display:none}
.top-search{flex:1;max-width:560px}
.top-search input{width:100%;min-height:44px;border-radius:99px;border:1px solid var(--line);
  background:var(--surface);padding:10px 18px;font-size:14.5px;color:var(--ink);box-shadow:var(--shadow)}
.top-search input:focus{outline:2px solid var(--green);outline-offset:1px}
.topbar .btn{margin-left:auto}
.topbar .top-search + .btn{margin-left:0}
.g-login{background:var(--surface)!important;color:var(--ink)!important;border-color:var(--line)!important;
  font-weight:650;box-shadow:var(--shadow)}
.g-mark{font-weight:900;color:#4285f4}
/* ===== Desktop topbar action cluster v0.3.18: controls grouped at the
   right like the demo (the old per-button margin-left:auto scattered
   them across the bar); theme becomes a Sáng/Tối segmented pair on
   desktop. Mobile keeps the single toggle: the wrapper dissolves via
   display:contents so every <=960px rule below applies as before. ===== */
.top-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.top-actions .btn{margin-left:0}
.topbar .top-seg{display:none}
.seg-btns button{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border:0;border-radius:999px;
  background:transparent;font-family:inherit;font-size:14px;font-weight:600;color:var(--ink2);cursor:pointer}
.seg-btns button.on{background:var(--green);color:#fff;box-shadow:var(--shadow)}
@media (min-width:961px){
  .topbar .top-seg{display:inline-flex}
  .topbar #themeToggle{display:none}
}
@media (max-width:960px){
  .top-actions{display:contents}
}
/* ===== Desktop search alignment v0.3.19: the content column is a
   centered max-width:1160px box, but the topbar spanned the full main
   column, so the search hugged the far left (capped at 560px) with a
   void before the buttons. On desktop the topbar now insets to the
   same column: the search starts exactly at the content's left edge
   (where the Dashboard heading starts) and stretches to the action
   cluster. Below 1160px the calc clamps back to the plain 30px. ===== */
@media (min-width:961px){
  .topbar{padding-left:max(30px, calc((100% - 1160px)/2 + 30px));
    padding-right:max(30px, calc((100% - 1160px)/2 + 30px))}
  .top-search{max-width:none}
}

/* ---------- generic controls ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:40px;
  padding:8px 15px;border-radius:12px;border:1px solid var(--line);background:var(--surface);
  color:var(--ink);text-decoration:none;cursor:pointer;font-size:14px;text-align:center;font-weight:550}
.btn:hover{filter:brightness(.98);transform:translateY(-1px)}
.btn.primary{background:var(--green);border-color:var(--green);color:#fff;font-weight:700}
.btn.small{min-height:32px;padding:4px 10px;font-size:13px;border-radius:9px}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:14px 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px 20px;box-shadow:var(--shadow)}
.card h3{margin:0 0 6px;font-size:19px}
.card p{margin:0;color:var(--ink2);font-size:14px}
a.card,.link-card{text-decoration:none;color:var(--ink);transition:transform .18s,box-shadow .18s}
a.card:hover,.link-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.alert{border:1px solid var(--line);background:var(--surface2);border-radius:var(--r-md);
  padding:13px 16px;margin:12px 0;font-size:14.5px}
.alert.ok{border-color:var(--green);background:var(--green-soft);color:var(--green-dk)}
.alert.err{border-color:var(--red);background:var(--accent-soft);color:var(--accent-ink)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.chip{display:inline-flex;padding:7px 14px;border-radius:99px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink2);text-decoration:none;font-size:13.5px;font-weight:600}
.chip.on{background:var(--green);border-color:var(--green);color:#fff}
.searchbar{display:flex;gap:8px;margin:12px 0 18px}
.searchbar input{flex:1;min-height:42px;border-radius:99px;border:1px solid var(--line);
  background:var(--surface);padding:9px 16px;font-size:14.5px;color:var(--ink)}
.searchbar input:focus{outline:2px solid var(--green);outline-offset:1px}
table{border-collapse:collapse;width:100%;background:var(--surface);border-radius:var(--r-md);overflow:hidden}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left;font-size:14.5px}
th{background:var(--surface2)}
.kv{display:grid;grid-template-columns:150px 1fr;gap:7px 14px;margin:12px 0}
.kv dt{color:var(--muted)} .kv dd{margin:0}
.tagline{color:var(--muted);font-size:12.5px;margin:6px 0 0}

/* ---------- forms ---------- */
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:24px;max-width:520px;margin:22px auto}
.form-card h2{margin-top:0}

/* ---------- account page (v0.3.10 redesign) ---------- */
.acct-wrap{max-width:640px;margin:18px auto;padding:0 2px;display:flex;flex-direction:column;gap:16px}
.acct-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:22px}
.acct-card h3{margin:0;font-size:17px}
.acct-head{display:flex;align-items:center;gap:16px;margin-bottom:14px}
.acct-avatar{flex:none;width:62px;height:62px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--green),var(--green-dk));color:#fff;font-size:27px;font-weight:800;box-shadow:var(--shadow)}
img.acct-avatar-img{display:block;object-fit:cover;background:var(--surface2);border:1px solid var(--line)}
.acct-id h2{margin:0;font-size:21px;line-height:1.25}
.acct-id p{margin:2px 0 0;color:var(--muted);font-size:13.5px;word-break:break-all}
.acct-rows{border-top:1px solid var(--line)}
.acct-row{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--line)}
.acct-row:last-child{border-bottom:none;padding-bottom:2px}
.acct-row span{color:var(--muted);font-size:13.5px;flex:none}
.acct-row strong{font-weight:600;text-align:right;word-break:break-all}
.set-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.set-row:last-of-type{border-bottom:none}
.set-label{font-weight:600;font-size:15px}
.set-hint{margin:4px 0 0;color:var(--muted);font-size:13px;line-height:1.5}
.switch{position:relative;flex:none;width:52px;height:30px;display:inline-block}
.switch input{position:absolute;inset:0;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}
.switch .track{position:absolute;inset:0;border-radius:999px;background:#cfd8cf;transition:background .2s;pointer-events:none}
.switch .track::after{content:"";position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;
  background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.25);transition:transform .2s}
.switch input:checked + .track{background:var(--green)}
.switch input:checked + .track::after{transform:translateX(22px)}
.switch input:focus-visible + .track{outline:2px solid var(--green);outline-offset:2px}
[data-theme="dark"] .switch .track{background:#3a463c}
.seg{display:inline-flex;flex:none;background:var(--surface2);border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px}
.seg label{position:relative;display:inline-flex}
.seg input{position:absolute;inset:0;opacity:0;cursor:pointer}
.seg span{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border-radius:999px;font-size:14px;font-weight:600;color:var(--ink2)}
.seg input:checked + span{background:var(--green);color:#fff;box-shadow:var(--shadow)}
.seg input:focus-visible + span{outline:2px solid var(--green);outline-offset:1px}
.acct-save{width:100%;min-height:48px;font-size:15.5px;margin-top:16px;border-radius:12px}
@media (max-width:640px){
  .acct-card{padding:18px 16px}
  .acct-avatar{width:54px;height:54px;font-size:24px}
}
.field{margin:0 0 13px}
.field label{display:block;font-size:13px;font-weight:650;margin-bottom:5px;color:var(--ink2)}
.field input,.field select,.field textarea{width:100%;min-height:42px;border:1px solid var(--line);
  border-radius:11px;background:var(--surface);color:var(--ink);padding:9px 12px;font-size:14.5px;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--green);outline-offset:1px}
.field.switch{display:flex;align-items:center;gap:9px}
.field.switch label{margin:0}
.inline-form{display:inline-block}
.csv-sample{background:var(--surface2);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:12px;font-size:12px;overflow-x:auto;white-space:pre-wrap;word-break:break-all}
dialog{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);color:var(--ink);
  box-shadow:var(--shadow-lg);max-width:min(560px,92vw);padding:24px}
dialog::backdrop{background:rgba(10,20,14,.45)}

/* ---------- home ---------- */
.hero{text-align:center;padding:44px 10px 26px}
.hero h1{font-size:38px;margin:10px 0 8px;letter-spacing:-.02em}
.hero p{color:var(--ink2);max-width:640px;margin:6px auto}
.hero .note{color:var(--muted);font-size:13.5px}
.cube{width:84px;height:84px;margin:0 auto;border-radius:24px;background:linear-gradient(135deg,var(--green),var(--green-dk));
  color:#fff;font-size:44px;font-weight:900;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-lg);animation:spin 14s linear infinite}
@keyframes spin{from{transform:rotateY(0)}to{transform:rotateY(360deg)}}

/* ---------- dashboard ---------- */
.stats{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}
.stats .card h3{font-size:30px;color:var(--green-dk)}
.countdown{background:linear-gradient(135deg,var(--green),var(--green-dk));color:#eafff3;border:none}
.countdown h3{color:#eafff3}
.countdown .big-days{font-size:36px;font-weight:900;color:#fff;margin:2px 0}
.countdown .muted{color:rgba(234,255,243,.85)}

/* ---------- learn pages ---------- */
.page-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}
.page-head h2{font-size:29px}
.page-sub{color:var(--muted);font-size:14.5px;margin:0}
.lvl-pills{display:flex;gap:9px;flex-wrap:wrap;margin:16px 0 12px}
.lvl-pill{display:inline-flex;align-items:center;gap:8px;padding:9px 20px;border-radius:99px;
  border:1.5px solid var(--line);background:var(--surface);color:var(--ink);
  text-decoration:none;font-weight:750;font-size:15px;box-shadow:var(--shadow)}
.lvl-pill .dot{width:9px;height:9px;border-radius:50%}
.lvl-pill.on{background:var(--green);border-color:var(--green);color:#fff}
.lvl-pill.on .dot{background:#fff!important}
.stat-strip{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);padding:12px 18px;font-size:14px;
  color:var(--ink2);box-shadow:var(--shadow)}
.stat-strip .ss-sep{color:var(--muted)}
.stat-strip .ss-right{margin-left:auto;color:var(--muted);font-size:13px}
.tabs{display:flex;gap:26px;border-bottom:1.5px solid var(--line);margin:18px 0 6px}
.tab{padding:9px 2px;font-size:15.5px;font-weight:650;color:var(--muted);text-decoration:none;
  border-bottom:2.5px solid transparent;margin-bottom:-1.5px}
.tab:hover{color:var(--ink)}
.tab.on{color:var(--accent);border-bottom-color:var(--accent)}
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;margin:16px 0}
.vcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--shadow);transition:transform .18s}
.vcard:hover{transform:translateY(-3px)}
.tag-chip{display:inline-block;background:var(--surface2);border:1px solid var(--line);color:var(--muted);
  font-size:10.5px;font-weight:700;letter-spacing:.03em;border-radius:99px;padding:3px 9px;margin-bottom:10px}
.vcard .word{font-size:26px;font-weight:700;line-height:1.35}
.vcard .word ruby rt{font-size:11px;color:var(--accent);font-weight:600}
.vcard .romaji{font-size:12px;color:var(--muted);letter-spacing:.03em;margin-top:1px}
.vcard .mean{font-weight:700;font-size:15px;margin-top:9px}
.vcard .ex{margin:11px 0 0;padding-top:11px;border-top:1px dashed var(--line);
  font-size:13.5px;line-height:1.65;color:var(--ink2)}
.vcard .ex .muted{color:var(--muted)}
.kanji-word{font-size:34px!important}
.on-kun{font-size:13px;color:var(--ink2);margin-top:2px}
.entry-main .term{font-size:22px;font-weight:700}
.entry-main .term ruby rt{font-size:11px;color:var(--accent);font-weight:600}
.kanji-big{font-size:32px;font-weight:700}
.kana{font-size:20px;font-weight:700}
.kana-table td{text-align:center;padding:10px 6px}
.row-actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px;align-items:center}

/* ---------- pager ---------- */
.pager{display:flex;align-items:center;justify-content:center;gap:8px;margin:22px 0 4px;flex-wrap:wrap}
.pg-btn,.pg-num{display:inline-flex;align-items:center;justify-content:center;min-width:40px;min-height:40px;
  padding:7px 13px;border-radius:12px;border:1px solid var(--line);background:var(--surface);
  color:var(--ink);text-decoration:none;font-size:14px;font-weight:600}
.pg-btn.dis{color:var(--muted);opacity:.6}
.pg-num.on{background:var(--green);border-color:var(--green);color:#fff;font-weight:800}
.pg-gap{color:var(--muted);padding:0 2px}
.pager-cap{text-align:center;color:var(--muted);font-size:13px;margin:6px 0 0}

/* ---------- flashcards ---------- */
.fc-progress{max-width:560px;margin:16px auto 0;height:8px;border-radius:99px;background:var(--line);overflow:hidden}
.fc-progress-fill{height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--green),#35a06a);transition:width .35s ease}
.fc-card{position:relative;max-width:560px;margin:14px auto;min-height:320px;cursor:pointer;perspective:1600px}
.fc-face{position:absolute;inset:0;background:var(--surface);border:1px solid var(--line);border-radius:24px;
  background-image:linear-gradient(155deg,var(--surface) 55%,var(--green-soft));
  box-shadow:0 22px 44px rgba(18,42,28,.14),0 3px 8px rgba(18,42,28,.07);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  padding:30px 26px;text-align:center;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  transition:transform .65s cubic-bezier(.25,.7,.25,1),box-shadow .65s}
.fc-card.flipped .fc-face{box-shadow:0 26px 50px rgba(18,42,28,.18),0 3px 8px rgba(18,42,28,.07)}
.fc-back{transform:rotateY(180deg)}
.fc-card.flipped .fc-front{transform:rotateY(180deg)}
.fc-card.flipped .fc-back{transform:rotateY(360deg)}
.fc-card.swap .fc-face{animation:fc-in .26s ease}
@keyframes fc-in{from{opacity:.35}to{opacity:1}}
.fc-hint{font-size:11px;font-weight:700;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
.fc-face .fc-term{font-size:54px;font-weight:850;line-height:1.15}
.fc-face .fc-term ruby rt{font-size:15px;color:var(--accent);font-weight:700}
.fc-read{color:var(--accent);font-size:19px;font-weight:650}
.fc-face .fc-mean{font-size:22px;font-weight:650}
.fc-face .fc-ex{color:var(--muted);font-size:15px;line-height:1.65}
.fc-face .fc-ex ruby rt{color:var(--accent)}
.fc-verdict{display:flex;gap:12px;justify-content:center;margin:16px auto 4px;max-width:560px}
.fc-vbtn{flex:1;max-width:230px;padding:13px 18px;border-radius:999px;font-size:16px;font-weight:750;cursor:pointer;font-family:inherit;transition:transform .12s,box-shadow .12s,background .12s}
.fc-vbtn:active{transform:scale(.97)}
.fc-vbtn.no{background:var(--surface);border:1.5px solid var(--accent);color:var(--accent)}
.fc-vbtn.no:hover{background:var(--accent-soft)}
.fc-vbtn.yes{background:var(--green);border:1.5px solid var(--green);color:#fff;box-shadow:0 8px 20px rgba(14,92,54,.28)}
.fc-vbtn.yes:hover{background:var(--green-dk)}
.fc-count{text-align:center}
.fc-bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:12px 0}
@media (prefers-reduced-motion: reduce){.fc-face{transition:none}.fc-card.swap .fc-face{animation:none}.cube{animation:none}.vcard,.btn{transition:none}}

/* ---------- footer ---------- */
footer{margin-top:auto}
.foot-in{max-width:1160px;margin:0 auto;padding:8px 30px 26px;width:100%}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:22px;
  border-top:1px solid var(--line);padding-top:24px}
.foot-grid h4{margin:0 0 9px;font-size:14.5px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin:5px 0;font-size:14px;color:var(--ink2)}
.foot-grid a{color:var(--ink2);text-decoration:none}
.foot-grid a:hover{color:var(--green)}
.foot-ads{color:var(--muted);font-size:12.5px;text-align:center;margin:14px 0 0}
.foot-bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  color:var(--muted);font-size:12.5px;border-top:1px solid var(--line);margin-top:14px;padding-top:14px}
footer .brand .logo{width:34px;height:34px;font-size:17px}

/* ---------- personal pages + kana grid (v0.3.0) ---------- */
.nav-toggle{display:none}
.scrim{display:none}
.kana-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;max-width:660px}
.kana-cell{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:12px 4px;text-align:center;box-shadow:var(--shadow);display:flex;flex-direction:column;
  gap:2px;align-items:center;justify-content:center;min-height:78px}
.kana-cell.empty{background:transparent;border:none;box-shadow:none}
.kana-char{font-size:30px;font-weight:700;line-height:1.15}
.kana-roma{font-size:12px;color:var(--muted)}
.wx-now{display:flex;gap:28px;flex-wrap:wrap;align-items:center}
.wx-main{min-width:190px}
.wx-city{font-size:15px;color:var(--muted);font-weight:650}
.wx-temp{font-size:56px;font-weight:900;line-height:1.05}
.wx-cond{font-size:19px;font-weight:700}
.wx-date{color:var(--muted);font-size:13.5px;margin-top:2px}
.wx-details p{margin:5px 0;font-size:14.5px;color:var(--ink2)}
.wx-days{display:flex;gap:10px;overflow-x:auto;padding:4px 2px 12px;-webkit-overflow-scrolling:touch}
.wx-day{flex:1 0 94px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:11px 8px;text-align:center;box-shadow:var(--shadow)}
.wx-day.today{border-color:var(--green);background:var(--green-soft)}
.wx-dn{font-size:11px;font-weight:800;letter-spacing:.06em;color:var(--muted)}
.wx-dd{font-size:11px;color:var(--muted)}
.wx-ic{font-size:24px;margin:4px 0}
.wx-hi{font-weight:800;font-size:16px}
.wx-lo{color:var(--muted);font-size:13.5px}
.wx-rain{font-size:12px;color:var(--blue);margin-top:2px;min-height:16px}
.cal-nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:12px 0}
.cal-title{margin:0;font-size:20px}
.cal-nav .btn.primary{margin-left:auto}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.cal-dow{text-align:center;font-size:12px;font-weight:800;color:var(--muted);padding:4px 0}
.cal-dow.sun{color:var(--red)}
.cal-dow.sat{color:var(--blue)}
.cal-cell{background:var(--surface);border:1px solid var(--line);border-radius:12px;
  min-height:88px;padding:7px 8px;display:flex;flex-direction:column;gap:2px;overflow:hidden}
.cal-cell.dim{opacity:.42}
.cal-cell.holiday{border-color:var(--accent);background:var(--accent-soft)}
.cal-cell.jlpt{border:2px solid var(--gold);background:var(--gold-soft)}
.cal-cell.today{outline:2px solid var(--green);outline-offset:-2px}
.cal-dn{font-weight:800;font-size:14.5px}
.cal-ev{font-size:11px;line-height:1.3}
.cal-ev.hol{color:var(--accent-ink);font-weight:650}
.cal-ev-jp{font-size:10.5px;color:var(--muted)}
.cal-ev.jlpt{color:var(--gold);font-weight:700}
.cal-ev.today{color:var(--green-dk);font-weight:800}
.cal-jlpt-badge{font-size:10px;font-weight:900;color:var(--gold);letter-spacing:.03em}
.cal-hol-row{display:flex;justify-content:space-between;gap:12px;padding:9px 2px;
  border-bottom:1px dashed var(--line);font-size:14.5px}
.ana-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:18px 0 20px}
.ana-stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:18px}
.ana-stat.hero{background:linear-gradient(150deg,var(--green-dk),var(--green));color:#fff;border-color:transparent}
.ana-stat-top{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:13.5px;font-weight:650;color:var(--ink2)}
.ana-stat.hero .ana-stat-top{color:#dff2e5}
.ana-arrow{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;
  border:1.5px solid currentColor;font-size:13px;opacity:.75;flex:none}
.ana-stat-num{font-size:40px;font-weight:850;line-height:1.1;margin:8px 0 4px;color:var(--green-dk)}
.ana-stat.hero .ana-stat-num{color:#fff}
.ana-stat p{margin:0;font-size:13px;color:var(--muted)}
.ana-stat.hero p{color:#cfe8d8}
.ana-grid2{display:grid;grid-template-columns:1.45fr 1fr;gap:18px;margin:0 0 18px}
.ana-panel{padding:20px}
.ana-panel h3{margin-top:0}
.ana-pchart{display:flex;gap:8px;align-items:flex-end;padding-top:6px}
.ana-pcol{flex:1;display:flex;flex-direction:column;align-items:center;gap:5px;min-width:0}
.ana-pval{font-size:12.5px;font-weight:750}
.ana-pwrap{height:118px;display:flex;align-items:flex-end;justify-content:center;width:100%}
.ana-pill{width:min(34px,68%);background:linear-gradient(180deg,#2c9a63,var(--green-dk));border-radius:99px;min-height:8px}
.ana-pill.zero{background:repeating-linear-gradient(45deg,var(--line) 0 5px,transparent 5px,transparent 10px);border:1px solid var(--line)}
.ana-pdow{font-size:11.5px;font-weight:650;text-align:center;line-height:1.3}
.ana-pdow span{color:var(--muted);font-weight:500}
.ana-pills{display:flex;gap:6px;flex-wrap:wrap;margin:2px 0 12px}
.ana-lvp{padding:5px 13px;border-radius:999px;border:1.5px solid var(--line);font-size:13px;font-weight:700;color:var(--ink2);text-decoration:none;background:var(--surface)}
.ana-lvp.on{background:var(--green);border-color:var(--green);color:#fff}
.ana-log-row{display:flex;justify-content:space-between;gap:12px;padding:9px 2px;border-bottom:1px dashed var(--line);font-size:14.5px}
.ana-log-row:last-child{border-bottom:none}
.ana-lvl{margin:10px 0}
.ana-lvl-head{display:flex;justify-content:space-between;font-size:14px;margin-bottom:5px}
.pbar{height:10px;background:var(--surface2);border:1px solid var(--line);border-radius:99px;overflow:hidden}
.pbar-fill{height:100%;background:var(--green);border-radius:99px}
@media (max-width:960px){
  .ana-stats{grid-template-columns:repeat(2,1fr)}
  .ana-grid2{grid-template-columns:1fr}
  .ana-stat-num{font-size:32px}
}

/* ---------- responsive: drawer sidebar + compact layout ---------- */
@media (max-width:960px){
  .sidebar{position:fixed;inset:0 auto 0 0;width:min(302px,86vw);z-index:90;height:100dvh;
    transform:translateX(-106%);transition:transform .28s ease;box-shadow:var(--shadow-lg)}
  body.nav-open .sidebar{transform:none}
  .scrim{display:block;position:fixed;inset:0;background:rgba(10,20,14,.45);z-index:80;
    opacity:0;pointer-events:none;transition:opacity .28s}
  body.nav-open .scrim{opacity:1;pointer-events:auto}
  .main-col{margin-left:0}
  .nav-toggle{display:inline-flex;margin-left:0;min-width:44px}
  .topbar{padding:10px 14px;gap:10px;flex-wrap:wrap}
  .top-brand{display:flex}
  .top-search{order:3;flex-basis:100%;max-width:none}
  .content{padding:18px 14px 6px}
  .foot-in{padding:8px 14px 22px}
  .cards-grid{grid-template-columns:1fr}
  .hero h1{font-size:29px}
  .cal-cell{min-height:70px;padding:5px 6px}
}
@media (max-width:640px){
  h2{font-size:22px}
  .content{padding:14px 10px 4px}
  .grid{grid-template-columns:1fr 1fr;gap:10px}
  .card{padding:14px}
  .stats .card h3{font-size:22px}
  .hero{padding:30px 4px 18px}
  .hero h1{font-size:25px}
  .wx-temp{font-size:44px}
  .wx-now{gap:14px}
  .cal-grid{gap:4px}
  .cal-cell{min-height:56px;border-radius:9px;padding:4px 5px}
  .cal-ev{font-size:9.5px}
  .cal-ev-jp{display:none}
  .cal-jlpt-badge{font-size:8.5px}
  .cal-nav .btn.primary{margin-left:0}
  .kana-grid{gap:5px}
  .kana-cell{min-height:60px;padding:8px 2px}
  .kana-char{font-size:23px}
  .tabs{gap:16px;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .tab{white-space:nowrap;font-size:14.5px}
  .lvl-pill{padding:8px 14px;font-size:14px}
  .kv{grid-template-columns:1fr;gap:2px}
  th,td{padding:7px 8px;font-size:13.5px}
  .ana-bar-wrap{height:84px}
  .ana-chart{gap:5px;padding:12px 8px 10px}
  .form-card{padding:18px 16px;margin:14px auto}
  .fc-face .fc-term{font-size:38px}
  .fc-card{min-height:280px}
  .fc-vbtn{font-size:15px;padding:12px 10px}
  .pager{gap:5px}
  .pg-btn,.pg-num{min-width:38px;min-height:38px;padding:6px 10px}
}

/* ===== Dashboard v0.3.1 (demo layout, real data) ===== */
.dash-head{display:flex;justify-content:space-between;align-items:flex-end;gap:14px;flex-wrap:wrap}
.dash-h{font-size:34px;margin:0;letter-spacing:-.02em}
.dash-actions{display:flex;gap:10px;align-items:center}
.btn.soon{cursor:default;background:var(--card,#fff);border:1px solid var(--line);color:var(--ink2)}
.btn.soon em{font-style:normal;font-size:11px;font-weight:800;background:#f3e3bb;color:#8a6410;border-radius:999px;padding:2px 8px;margin-left:4px}
.stat-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:8px}
.stat-card{position:relative;display:block;background:var(--card,#fff);border:1px solid var(--line);border-radius:18px;padding:18px;text-decoration:none;color:var(--ink)}
.stat-card .s-label{font-weight:700;color:var(--ink2);margin:0 26px 2px 0}
.stat-card .s-value{font-size:40px;font-weight:900;letter-spacing:-.02em;margin:0;color:var(--ink)}
.stat-card .s-sub{color:var(--muted);font-size:13.5px;margin:2px 0 0}
.stat-card.green{background:linear-gradient(135deg,var(--green),var(--green-dk));border:none;color:#eafff3}
.stat-card.green .s-label{color:#c9ecd8}
.stat-card.green .s-value{color:#fff}
.stat-card.green .s-sub{color:#bfe6cf}
.s-arrow{position:absolute;top:14px;right:14px;width:30px;height:30px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--ink2)}
.stat-card.green .s-arrow{border-color:rgba(255,255,255,.45);color:#fff}
.cd-banner{position:relative;overflow:hidden;background:linear-gradient(120deg,#b97f14,#e0a41c 55%,#eda921);color:#fff;border-radius:20px;padding:22px 24px;margin-top:14px}
.cd-watermark{position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:150px;font-weight:900;line-height:1;color:rgba(255,255,255,.13);pointer-events:none}
.cd-label{font-weight:800;letter-spacing:.14em;font-size:12.5px;opacity:.92;margin:0}
.cd-big{font-size:44px;font-weight:900;margin:2px 0 4px;letter-spacing:-.01em}
.cd-line{margin:0;position:relative;z-index:1}
.cd-line a{color:#fff;font-weight:700;text-decoration:underline}
.dash-panels{display:grid;grid-template-columns:1.25fr 1fr;gap:14px;margin-top:14px}
.panel{background:var(--card,#fff);border:1px solid var(--line);border-radius:18px;padding:18px}
.panel h3{margin:0 0 2px}
.week-chart{display:flex;align-items:stretch;gap:8px;height:180px;margin-top:8px}
.wcol{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:6px;height:100%}
.wval{font-size:12.5px;font-weight:800;color:var(--green-dk)}
.wbar{width:72%;max-width:46px;border-radius:12px}
.wbar.fill{background:linear-gradient(180deg,var(--green),var(--green-dk))}
.wbar.fill.alt{background:linear-gradient(180deg,#57b87e,#3d9e67)}
.wbar.empty{background:repeating-linear-gradient(45deg,#e3e8e3 0 6px,#f4f7f4 6px 12px);border:1px solid var(--line)}
.wdow{font-size:12px;color:var(--muted)}
.donut-flex{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.donut-wrap{position:relative;width:150px;height:150px;flex:none}
.donut{width:150px;height:150px}
.donut-bg{fill:none;stroke:#e6ece6;stroke-width:15}
.donut-fg{fill:none;stroke:var(--green);stroke-width:15;stroke-linecap:round}
.donut-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.donut-center strong{font-size:30px;letter-spacing:-.02em}
.donut-center span{font-size:10.5px;letter-spacing:.12em;color:var(--muted);font-weight:700}
.legend{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.legend .dot{display:inline-block;width:11px;height:11px;border-radius:50%;margin-right:8px}
.legend .dot.g{background:var(--green)}
.legend .dot.l{background:repeating-linear-gradient(45deg,#cfd8cf 0 3px,#eef2ee 3px 6px);border:1px solid var(--line)}
.legend .dot.t{background:#0d2149}
.dash-hero{position:relative;margin-top:14px;background:linear-gradient(120deg,#0d2149,#132c63 60%,#1b3572);color:#fff;border-radius:28px;padding:40px 36px;display:grid;grid-template-columns:1.15fr .85fr;gap:30px;align-items:center;overflow:hidden;box-shadow:var(--shadow-lg)}
.dash-hero h2{position:relative;font-size:clamp(26px,4vw,40px);line-height:1.12;margin:0 0 14px;font-weight:900;letter-spacing:-.02em}
.dash-hero h2 .salmon{color:#ffb1a6}
.dash-hero p{position:relative;color:#c6d2e2;font-size:15px;line-height:1.65;margin:0 0 22px;max-width:52ch}
.dash-sec{margin-top:22px}
@media (max-width:1000px){.stat-cards{grid-template-columns:repeat(2,1fr)}.dash-panels{grid-template-columns:1fr}}
@media (max-width:640px){.stat-cards{grid-template-columns:1fr 1fr}.stat-card .s-value{font-size:31px}.cd-big{font-size:34px}.cd-watermark{font-size:96px}.dash-h{font-size:28px}}

/* ===== Sidebar SVG icons v0.3.4 (demo icon set) ===== */
.side-item .si-ic{display:flex;align-items:center;justify-content:center;width:20px}
.side-item .si-ic svg{display:block}
.cal-bdg{margin-left:auto;background:var(--green);color:#fff;font-size:10px;font-weight:800;letter-spacing:.03em;border-radius:999px;padding:2px 8px}

/* ===== Mobile bottom tab bar v0.3.5 (demo position: fixed bottom) ===== */
.mobile-tabs{display:none}
@media (max-width:960px){
  .mobile-tabs{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:var(--surface);background:color-mix(in srgb, var(--surface) 94%, transparent);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
  .mobile-tabs a,.mobile-tabs button,.mobile-tabs span{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
    padding:6px 2px;border-radius:12px;font-size:10.5px;font-weight:700;color:var(--muted);
    background:transparent;border:0;text-decoration:none;font-family:inherit;cursor:pointer}
  .mobile-tabs a.on{color:var(--green-dk);background:var(--green-soft)}
  .mobile-tabs .mt-soon{opacity:.72;cursor:default}
  .main-col{padding-bottom:74px}
}

/* ===== Mobile topbar auth row v0.3.6: login/logout as a full-width bar ===== */
@media (max-width:960px){
  .topbar #themeToggle{margin-left:auto}
  .topbar .g-login,.topbar .top-auth{order:4;flex-basis:100%;margin-left:0;justify-content:center}
}

/* ===== Topbar furigana toggle v0.3.7 (next to the theme toggle) ===== */
.furi-toggle{gap:7px}
.furi-toggle .ft-a{font-weight:800;font-size:15px;line-height:1}
.furi-toggle .ft-state{font-size:10.5px;font-weight:800;letter-spacing:.03em;border-radius:999px;padding:2px 8px;background:var(--green);color:#fff}
.furi-toggle[aria-pressed="false"] .ft-state{background:var(--line);color:var(--muted)}
.furi-toggle[aria-pressed="false"] .ft-a,.furi-toggle[aria-pressed="false"] .ft-label{opacity:.55}
@media (max-width:640px){
  .furi-toggle .ft-label{display:none}
}

/* ===== Mobile topbar compaction v0.3.8: menu+logo further left, site name back ===== */
@media (max-width:960px){
  .topbar{padding:10px;gap:8px}
  .top-brand{gap:8px;font-size:15.5px}
  .top-brand .logo{width:34px;height:34px;font-size:17px}
  .top-brand span:last-child{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:118px}
}
@media (max-width:640px){
  .nav-toggle{min-width:40px;padding:8px 10px}
}

/* ===== v0.3.9: mobile top row on ONE line (menu, logo, name, theme, furigana) ===== */
@media (max-width:960px){
  .topbar{padding:10px 8px;gap:6px}
  .topbar .btn{flex:none}
  .top-brand{flex:0 1 auto;min-width:0;gap:7px}
  .top-brand span:last-child{max-width:104px}
  .topbar #themeToggle{padding:8px 10px}
  .topbar .furi-toggle{padding:8px 10px}
}

/* ===== Mobile header repair v0.3.20: the desktop Sáng/Tối pair leaked
   onto phones (the generic .seg rule sits later in this file and beat
   the pair's display:none at equal specificity), doubling the theme
   control across two rows; and the login button lost its full-width
   row to the later .topbar .btn{flex:none}. Desktop untouched. ===== */
@media (max-width:960px){
  .topbar .top-seg{display:none}
  .topbar .g-login,.topbar .top-auth{flex:0 0 100%;order:4;margin-left:0;justify-content:center}
}

/* ===== Dashboard hero like the demo v0.3.21: glow overlays, watermark
   kana, red + ghost CTA pair, real-count stats row, and the rotating
   3D cube (語/日/本/学/習/夢) with floating speech chips. The old flat
   spinning card (a rotateY card seen edge-on as a sliver) is retired
   from the hero; .cube itself stays for the guest landing. ===== */
.dash-hero::before{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background:radial-gradient(420px 260px at 88% -10%, rgba(217,58,43,.45), transparent 60%),
  radial-gradient(500px 320px at -10% 110%, rgba(200,137,10,.30), transparent 60%)}
.dash-hero-text{position:relative}
.hero-kana{position:absolute;right:-24px;bottom:-58px;font-weight:900;font-size:180px;line-height:1;
  color:rgba(255,255,255,.05);pointer-events:none}
.hero-cta{position:relative;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.hero-acc{background:#d93a2b;color:#fff;box-shadow:0 10px 24px rgba(217,58,43,.35)}
.hero-acc:hover{background:#b92e21}
.hero-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.25);cursor:default}
.hero-ghost em{font-style:normal;font-size:11px;font-weight:800;background:#f3e3bb;color:#8a6410;border-radius:999px;padding:2px 8px;margin-left:4px}
.hero-stats{position:relative;display:flex;gap:24px;margin-top:26px;flex-wrap:wrap}
.hero-stats div b{display:block;font-size:20px;font-weight:800}
.hero-stats div span{font-size:12px;color:#9fb2c8}
.cube-stage{position:relative;height:280px;perspective:900px;display:grid;place-items:center}
.cube3d{position:relative;width:140px;height:140px;transform-style:preserve-3d;animation:cubespin3d 22s linear infinite}
@keyframes cubespin3d{from{transform:rotateX(-18deg) rotateY(0)}to{transform:rotateX(-18deg) rotateY(360deg)}}
.cube3d .face{position:absolute;inset:0;display:grid;place-items:center;border-radius:18px;
  font-weight:900;font-size:58px;color:#fff;background:color-mix(in srgb, #d93a2b 82%, #000 6%);
  border:1px solid rgba(255,255,255,.35);box-shadow:inset 0 0 40px rgba(0,0,0,.18);backface-visibility:hidden}
.cube3d .f1{transform:translateZ(70px)}
.cube3d .f2{transform:rotateY(90deg) translateZ(70px);background:#1f3a5f}
.cube3d .f3{transform:rotateY(180deg) translateZ(70px);background:#c8890a}
.cube3d .f4{transform:rotateY(-90deg) translateZ(70px);background:#0e9594}
.cube3d .f5{transform:rotateX(90deg) translateZ(70px);background:#2e9e5b}
.cube3d .f6{transform:rotateX(-90deg) translateZ(70px);background:#42505e}
.orbit-chip{position:absolute;padding:8px 14px;border-radius:12px;font-weight:700;font-size:14px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);color:#fff;
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);animation:floaty 5s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}
@media (prefers-reduced-motion: reduce){.cube3d,.orbit-chip{animation:none}}
@media (max-width:960px){
  .dash-hero{grid-template-columns:1fr;padding:28px 20px}
  .cube-stage{height:220px;order:-1}
  .cube3d{width:104px;height:104px}
  .cube3d .face{font-size:42px}
  .cube3d .f1{transform:translateZ(52px)}
  .cube3d .f2{transform:rotateY(90deg) translateZ(52px)}
  .cube3d .f3{transform:rotateY(180deg) translateZ(52px)}
  .cube3d .f4{transform:rotateY(-90deg) translateZ(52px)}
  .cube3d .f5{transform:rotateX(90deg) translateZ(52px)}
  .cube3d .f6{transform:rotateX(-90deg) translateZ(52px)}
  .hero-kana{font-size:120px}
}

/* ===== Level cards + feature grid like the demo v0.3.22: five colored
   level cards (cumulative real counts; progress bar ONLY for signed-in
   users, from their real per-level flashcard progress) and the demo's
   eight feature cards with pastel icon tiles. ===== */
.sec-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin:26px 0 12px}
.sec-head h3{font-size:22px;font-weight:800;letter-spacing:-.015em;margin:0}
.sec-head p{color:var(--muted);font-size:14px;margin:0}
.lvl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.lvl-card{position:relative;display:block;border-radius:var(--r-lg);padding:20px 18px 18px;color:#fff;
  overflow:hidden;box-shadow:var(--shadow);text-decoration:none;transition:transform .25s ease,box-shadow .25s ease}
.lvl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.lvl-card::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(340px circle at 50% 50%, rgba(255,255,255,.28), transparent 45%);opacity:0;transition:opacity .25s}
.lvl-card:hover::after{opacity:1}
.lvl-card.lv5{background:#1d7a4c}
.lvl-card.lv4{background:#0e9594}
.lvl-card.lv3{background:#2f6fdb}
.lvl-card.lv2{background:#c77f06}
.lvl-card.lv1{background:#d93a2b}
.lvl-card .big{font-weight:900;font-size:42px;line-height:1;letter-spacing:-.02em}
.lvl-card .nm{font-weight:700;font-size:14.5px;margin-top:6px}
.lvl-card .st{font-size:12px;opacity:.85;margin:8px 0 0;line-height:1.55}
.lvl-bar{height:6px;border-radius:99px;background:rgba(255,255,255,.28);margin-top:13px;overflow:hidden}
.lvl-bar i{display:block;height:100%;border-radius:99px;background:#fff}
.lvl-pct{font-size:11.5px;font-weight:700;margin:6px 0 0;opacity:.9}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.feat{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;text-decoration:none;color:var(--ink)}
a.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.feat .ic{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:13px}
.feat h3{margin:0 0 6px;font-size:16.5px;font-weight:700}
.feat p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.6}
.feat .soon-tag{font-style:normal;font-size:11px;font-weight:800;background:#f3e3bb;color:#8a6410;border-radius:999px;padding:2px 8px;margin-left:4px;vertical-align:2px}
@media (max-width:1100px){.lvl-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:960px){.feat-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.lvl-grid{grid-template-columns:1fr 1fr}.feat-grid{grid-template-columns:1fr}}

/* v0.4.0: admin exam desk — editor blocks + posted-exam cards */
.exam-form .card{margin-bottom:16px}
.ex-q{border:1px solid var(--line);border-radius:14px;padding:14px;margin:0 0 12px;background:var(--surface)}
.ex-q-meta{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 10px}
.ex-q-meta label{flex:1 1 150px;font-size:12.5px;font-weight:650;color:var(--ink2)}
.ex-q-meta select,.ex-q-meta input{width:100%;min-height:38px;margin-top:4px;border:1px solid var(--line);border-radius:10px;padding:6px 9px;background:var(--surface2);color:var(--ink)}
.ex-opts{display:grid;gap:8px}
.ex-opt{display:flex;gap:8px;align-items:center}
.ex-opt>input{flex:1;min-height:38px;border:1px solid var(--line);border-radius:10px;padding:6px 10px;background:var(--surface2);color:var(--ink)}
.ex-radio{display:inline-flex;align-items:center;gap:5px;font-weight:800}
.ex-radio input{width:18px;height:18px;accent-color:var(--green)}
.ex-q-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:10px 0 0;flex-wrap:wrap}
.ex-passage{border:1px dashed var(--line);border-radius:14px;padding:14px;margin:0 0 12px}
.ex-mondai{border:1px solid var(--line);border-radius:14px;padding:14px;margin:0 0 12px;background:var(--surface)}
.ex-ansrow{display:flex;flex-wrap:wrap;gap:10px}
.ex-ans{display:inline-flex;align-items:center;gap:5px;border:1px solid var(--line);border-radius:10px;padding:5px 8px;background:var(--surface2)}
.ex-ans select{min-height:32px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink)}
.ex-ans-del{border:0;background:none;color:var(--red-text);font-size:12px;cursor:pointer;text-decoration:underline}
.exam-actions{display:flex;gap:10px;flex-wrap:wrap;margin:6px 0 20px}
.ex-card{margin-bottom:12px}
.ex-card-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.ex-card-head h3{margin:0;flex:1}
.ex-lvl{display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:32px;padding:0 8px;border-radius:9px;color:#fff;font-weight:900}
.ex-lvl.lv5{background:#1d7a4c}.ex-lvl.lv4{background:#0e9594}.ex-lvl.lv3{background:#2f6fdb}.ex-lvl.lv2{background:#c77f06}.ex-lvl.lv1{background:#d93a2b}
.ex-badge{font-size:11.5px;font-weight:800;padding:3px 9px;border-radius:999px;background:var(--surface2);border:1px solid var(--line);color:var(--ink2)}
.ex-badge.pub{background:var(--green-soft);color:var(--green-dark);border-color:transparent}
.ex-badge.yt{background:#ffe9e4;color:#b3271a;border-color:transparent}
.ex-card-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:8px 0 0}

/* ===== Mobile/iPad header v0.4.1 (owner screenshot 2026-10-31): the
   site name was cut to "Nihongo Mas..." by the v0.3.9 max-width caps,
   and the whole left cluster sat too far right because the generic
   .topbar .btn{margin-left:auto} also hits the hamburger (a .btn) —
   the row's free space got split across every auto margin in the row.
   Fix: hamburger margin back to 0, brand never shrinks, name uncapped.
   Desktop untouched (media query only). ===== */
@media (max-width:960px){
  .topbar .nav-toggle{margin-left:0}
  .topbar .top-brand{flex:0 0 auto;min-width:auto}
  .topbar .top-brand span:last-child{max-width:none;overflow:visible;text-overflow:clip;white-space:nowrap}
}
@media (max-width:480px){
  .topbar .top-brand{font-size:14.5px;gap:6px}
  .topbar .top-brand .logo{width:30px;height:30px;font-size:15px}
  .topbar .nav-toggle{min-width:36px}
}

/* v0.4.2: exam form like the demo — two columns, part tabs, demo editors */
.ex-layout{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:22px;align-items:start}
@media (max-width:1100px){.ex-layout{grid-template-columns:1fr}}
.ex-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 0 14px}
@media (max-width:640px){.ex-tabs{grid-template-columns:1fr}}
.ex-tab{text-align:left;border:1.5px solid var(--line);background:var(--surface);border-radius:14px;padding:12px 14px;cursor:pointer;color:var(--ink)}
.ex-tab b{display:block;font-size:15px;margin-bottom:3px}
.ex-tab span{font-size:12.5px;color:var(--ink2);line-height:1.35;display:block}
.ex-tab.on{background:var(--green);border-color:var(--green);color:#fff}
.ex-tab.on span{color:#dff3e6}
.ex-desc{border:1px dashed var(--line);border-radius:12px;padding:11px 13px;font-size:13.5px;line-height:1.55;color:var(--ink2);margin:0 0 14px;background:var(--surface2)}
.ex-q-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.ex-q-head b{font-size:15px}
.ex-meta-line{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:flex-end;margin-top:10px}
.ex-pick{font-size:12.5px;color:var(--ink2);align-self:center}
.ex-meta-f{display:flex;flex-direction:column;gap:4px;font-size:12.5px;font-weight:650;color:var(--ink2)}
.ex-meta-f input,.ex-meta-f select{min-height:36px;border:1px solid var(--line);border-radius:9px;padding:5px 8px;background:var(--surface2);color:var(--ink);width:110px}
.ex-meta-f.grow{flex:1 1 200px}
.ex-meta-f.grow input{width:100%}
.ex-ytbox{border:1.5px solid #d9a404;background:#fff8e1;border-radius:14px;padding:14px;margin:0 0 16px}
[data-theme="dark"] .ex-ytbox{background:#3a2f10}
.ex-ytbox h4{margin:0 0 10px;font-size:15.5px}
.ex-yt-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:8px 0}
.ex-yt-frame{position:relative;padding-top:56.25%;margin:8px 0}
.ex-yt-frame iframe{position:absolute;inset:0;width:100%;height:100%;border-radius:10px}
.ex-frame{border:1.5px solid #d9a404;background:#fff8e1;border-radius:14px;padding:12px 14px;margin:0 0 10px}
[data-theme="dark"] .ex-frame{background:#3a2f10}
.ex-frame-head{display:flex;gap:10px;align-items:baseline;margin-bottom:8px}
.ex-frame-head span{font-size:12.5px;color:var(--ink2)}
.ex-frame-row{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap}
.ex-note{border:1.5px dashed #d9a404;color:#8a6100;background:#fff8e1;border-radius:12px;padding:10px 13px;font-size:13.5px;font-weight:650;margin:12px 0}
[data-theme="dark"] .ex-note{color:#f2cd6b;background:#3a2f10}
.ex-lq-note{color:#8a6100;font-size:13.5px;font-weight:650;margin:0 0 6px}
[data-theme="dark"] .ex-lq-note{color:#f2cd6b}
.ex-lq-correct{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:10px 0 0;font-weight:650;font-size:13.5px}
.ex-pills{display:inline-flex;gap:8px}
.ex-pill input{position:absolute;opacity:0;pointer-events:none}
.ex-pill span{display:inline-flex;align-items:center;gap:6px;border:1.5px solid var(--line);border-radius:999px;padding:7px 16px;font-weight:800;cursor:pointer;background:var(--surface)}
.ex-pill span::before{content:"";width:13px;height:13px;border-radius:50%;border:2px solid var(--muted)}
.ex-pill input:checked + span{border-color:var(--green);background:var(--green-soft)}
.ex-pill input:checked + span::before{background:var(--green);border-color:var(--green)}
.ex-side .ex-card{margin-bottom:12px}

/* v0.4.3: admin polish — Be Vietnam Pro, profile chip, stat cards, charts */
.admin-page{font-family:"Be Vietnam Pro",var(--font,system-ui,-apple-system,"Segoe UI",sans-serif)}
.admin-page h2{letter-spacing:-.01em}
.ax-head{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:12px}
.ax-head h2{margin:0}
.ax-profile{display:flex;align-items:center;gap:11px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 16px 6px 6px}
.ax-av{width:42px;height:42px;border-radius:50%;object-fit:cover;flex:none}
.ax-av-letter{display:inline-flex;align-items:center;justify-content:center;background:var(--green);color:#fff;font-weight:800;font-size:18px}
.ax-profile-tx{display:flex;flex-direction:column;line-height:1.25}
.ax-profile-tx b{font-size:14.5px}
.ax-profile-tx span{font-size:12px;color:var(--ink2)}
.ax-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:0 0 16px}
@media (max-width:760px){.ax-stats{grid-template-columns:repeat(2,1fr)}}
.ax-stat{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:14px 16px;display:flex;flex-direction:column;gap:5px}
.ax-stat-label{font-size:11.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--ink2)}
.ax-stat-num{font-size:31px;font-weight:900;letter-spacing:-.02em;line-height:1}
.ax-chart-card{margin:0 0 18px}
.ax-chart-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.ax-chart-head h3{margin:0 0 2px}
.ax-legend{display:flex;gap:14px;font-size:12.5px;font-weight:650;color:var(--ink2)}
.ax-lg{display:inline-flex;align-items:center;gap:6px}
.ax-sw{width:14px;height:14px;border-radius:4px;display:inline-block}
.ax-sw.bar{background:var(--green)}
.ax-sw.line{background:#c77f06;border-radius:50%;width:10px;height:10px}
.ax-chart{width:100%;height:auto;display:block;margin-top:6px}
.ax-bar{fill:var(--green);opacity:.88}
.ax-line{stroke:#c77f06;stroke-width:2.4;stroke-linejoin:round;stroke-linecap:round}
.ax-dot{fill:#c77f06}
.ax-grid{stroke:var(--line);stroke-width:1;stroke-dasharray:3 4}
.ax-xlab{fill:var(--ink2);font-size:10.5px}
.ax-chart-nums{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;border-top:1px solid var(--line);padding-top:12px;margin-top:8px}
@media (max-width:640px){.ax-chart-nums{grid-template-columns:1fr}}
.ax-chart-nums div{display:flex;flex-direction:column;gap:2px}
.ax-chart-nums span{font-size:12px;color:var(--ink2);font-weight:650}
.ax-chart-nums b{font-size:19px;font-weight:850}
.ax-levels{margin:0 0 16px}
.ax-levels h4{margin:0 0 10px}
.ax-lvrow{display:flex;align-items:center;gap:10px;margin:0 0 8px}
.ax-lvrow .ex-lvl{min-width:40px;height:28px;font-size:13px}
.ax-lvtrack{flex:1;height:10px;border-radius:99px;background:var(--surface2);overflow:hidden}
.ax-lvtrack i{display:block;height:100%;background:var(--green);border-radius:99px;min-width:0}
.ax-lvrow b{min-width:22px;text-align:right}

/* v0.4.5: weather hero on the demo's blue gradient (white text) */
.card.wx-now{background:linear-gradient(115deg,#163c60 0%,#2c66a8 52%,#6ea6d4 100%);border-color:transparent;color:#fff;box-shadow:0 14px 30px rgba(22,60,96,.28)}
.card.wx-now .wx-city{color:#cfe4f7}
.card.wx-now .wx-date{color:#cfe4f7}
.card.wx-now .wx-details p{color:#eaf3fc}

/* v0.4.6: merged kana page (demo layout) + sidebar countdown never shrinks */
.kana-h{margin:22px 0 10px;font-size:13px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.kana-grid.yoon{grid-template-columns:repeat(3,1fr)}
.kana-cell .kc{display:block;font-size:30px;font-weight:800;line-height:1.15}
.kana-cell .kr{display:block;font-size:13px;font-weight:700;color:#d93a2b;margin-top:1px}
.kana-cell .kn{display:block;font-size:12.5px;color:var(--muted);margin-top:1px}
.side-jlpt{flex:none}
@media (max-width:640px){.kana-cell .kc{font-size:23px}}

/* v0.4.7: one-shot welcome toast after a successful sign-in (auto-hides) */
.welcome-toast{position:fixed;top:14px;left:50%;transform:translateX(-50%);z-index:300;display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,var(--green),var(--green-dk));color:#fff;padding:10px 20px 10px 10px;border-radius:16px;box-shadow:0 16px 38px rgba(10,40,24,.35);width:max-content;max-width:min(92vw,460px);pointer-events:none;animation:wt-life 3.4s ease forwards}
@media (max-width:640px){
  .welcome-toast{top:10px;gap:10px;padding:8px 14px 8px 8px;border-radius:14px}
  .welcome-toast .wt-av{width:36px;height:36px}
  .welcome-toast .wt-tx strong{font-size:14.5px}
  .welcome-toast .wt-tx small{font-size:12px}
}
.welcome-toast .wt-av{width:42px;height:42px;border-radius:50%;flex:none;object-fit:cover;background:rgba(255,255,255,.2)}
.welcome-toast .wt-letter{display:flex;align-items:center;justify-content:center;font-weight:900;font-size:19px}
.welcome-toast .wt-tx{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.welcome-toast .wt-tx strong{font-size:15.5px;font-weight:800}
.welcome-toast .wt-tx small{font-size:12.5px;opacity:.92}
@keyframes wt-life{0%{opacity:0;transform:translate(-50%,-14px)}9%{opacity:1;transform:translate(-50%,0)}82%{opacity:1;transform:translate(-50%,0)}100%{opacity:0;transform:translate(-50%,-10px);visibility:hidden}}

/* v0.4.8: kana page wide like the demo + pill tabs */
.kana-grid{max-width:none;gap:12px}
.kana-cell{padding:18px 6px 15px;border-radius:14px;min-height:106px}
.kana-cell .kc{font-size:34px}
.kana-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 4px}
.ktab{padding:9px 24px;border-radius:999px;border:1.5px solid var(--line);background:var(--surface);font-weight:700;font-size:15px;color:var(--ink2);text-decoration:none}
.ktab.on{background:var(--green);border-color:var(--green);color:#fff}
@media (max-width:640px){.kana-grid{gap:6px}.kana-cell{min-height:78px;padding:10px 2px}.kana-cell .kc{font-size:23px}.ktab{padding:8px 18px;font-size:14px}}

/* v0.4.9: particles page as demo cards */
.pt-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pt-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px 20px 14px;box-shadow:var(--shadow)}
.pt-head{display:flex;align-items:baseline;gap:10px}
.pt-char{font-size:36px;font-weight:900;line-height:1}
.pt-rd{font-size:20px;font-weight:800;color:#d93a2b}
.pt-roma{font-size:14.5px;font-weight:700;color:var(--muted)}
.pt-readline{margin:8px 0 4px;font-size:13.5px;color:var(--muted)}
.pt-readline b{color:#d93a2b}
.pt-label{margin:14px 0 5px;font-size:11px;font-weight:800;letter-spacing:.11em;text-transform:uppercase;color:var(--muted)}
.pt-mean{margin:0;font-size:16px;font-weight:800;line-height:1.45}
.pt-use{margin:0;font-size:14.5px;line-height:1.6;color:var(--ink2)}
.pt-ex{border-top:1px dashed var(--line);padding:9px 0 7px}
.pt-ex-jp{margin:0;font-size:16.5px;line-height:1.9}
.pt-ex-jp rt{color:#d93a2b;font-size:10.5px}
.pt-ex-vi{margin:1px 0 0;font-size:14px;color:var(--ink2)}
@media (max-width:1100px){.pt-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){.pt-grid{grid-template-columns:1fr}}

/* v0.4.12: study page head + deterministic 3/2/1 entry grid (demo layout) */
.study-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}
.study-head .page-sub{margin:0}
.study-grid{grid-template-columns:repeat(3,1fr)}
@media (max-width:1100px){.study-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){.study-grid{grid-template-columns:1fr}}

/* v0.4.13: designed choosers in the exam form (pills / option cards /
   segmented) + styled native selects everywhere in the admin forms */
.ex-pills{margin:2px 0 4px}
.ex-pill.on{background:var(--lc);border-color:var(--lc);color:#fff}
.ex-pill.on .dot{background:#fff!important}
.opt-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.opt-card{position:relative;text-align:left;border:1.5px solid var(--line);background:var(--surface);
  border-radius:12px;padding:11px 13px 11px 38px;cursor:pointer;display:flex;flex-direction:column;gap:2px;
  font:inherit;color:var(--ink)}
.opt-card::before{content:"";position:absolute;left:13px;top:13px;width:14px;height:14px;border-radius:50%;
  border:2px solid var(--line);background:var(--surface)}
.opt-card .oc-t{font-weight:700;font-size:14.5px}
.opt-card .oc-d{font-size:12.5px;color:var(--muted);line-height:1.45}
.opt-card:hover{border-color:var(--green)}
.opt-card.on{border-color:var(--green);background:var(--green-soft)}
.opt-card.on::before{border-color:var(--green);background:var(--green);box-shadow:inset 0 0 0 3px var(--surface)}
@media (max-width:720px){.opt-cards{grid-template-columns:1fr}}
.seg2{display:inline-flex;background:var(--surface2);border:1px solid var(--line);border-radius:99px;padding:4px;gap:4px;max-width:100%;overflow-x:auto}
.seg-it{border:0;background:transparent;padding:8px 18px;border-radius:99px;font:inherit;font-weight:600;
  cursor:pointer;color:var(--muted);white-space:nowrap}
.seg-it.on{background:var(--green);color:#fff}
.field select,#examForm select{appearance:none;-webkit-appearance:none;padding-right:34px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2375857b' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center}

/* v0.4.14: grammar cards like the demo - pattern chip, bold gloss,
   regular explanation, amber common-mistake box */
.g-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.g-pattern{display:inline-block;background:var(--navy-soft);color:var(--navy);font-weight:700;
  font-size:18px;line-height:1.3;padding:6px 12px;border-radius:10px}
.g-expl{font-size:14.5px;line-height:1.6;color:var(--ink2);margin:6px 0 0}
.g-pitfall{margin-top:12px;background:var(--gold-soft);border:1px solid #efdfae;border-radius:12px;
  padding:10px 13px;font-size:13.5px;line-height:1.55;color:var(--ink2)}
.g-pitfall strong{color:var(--gold)}
[data-theme="dark"] .g-pitfall{border-color:#5a4a1e}

/* v0.4.15: verb forms reference page */
.vf-sec{font-size:20px;margin:26px 0 12px}
.vf-groups{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.vf-group{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 18px}
.vf-group h3{margin:0 0 8px;font-size:16.5px}
.vf-group p{margin:0;font-size:14px;line-height:1.6;color:var(--ink2)}
.vf-exchips{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.vf-chip{background:var(--surface2);border:1px solid var(--line);border-radius:99px;padding:3px 11px;font-size:13.5px;font-weight:600}
.vf-chip.warn{background:var(--surface);border-color:#e5cf8f}
.vf-trap{margin-top:14px}
.vf-tblwrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:16px}
.vf-table{border-collapse:collapse;width:100%;min-width:640px;font-size:15px}
.vf-table th,.vf-table td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.vf-table thead th{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.vf-table .vf-fname{font-weight:700;background:var(--surface2);position:sticky;left:0}
.vf-table tbody tr:last-child td,.vf-table tbody tr:last-child th{border-bottom:0}
.vf-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.vf-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px 20px}
.vf-name{font-size:17px;font-weight:700}
.vf-use{font-size:14.5px;line-height:1.6;color:var(--ink2);margin:10px 0 4px}
.vf-rule{display:flex;gap:9px;align-items:flex-start;padding:6px 0;font-size:14px;line-height:1.55;border-bottom:1px dashed var(--line)}
.vf-rule:last-of-type{border-bottom:0}
.vf-gchip{flex:none;font-size:11.5px;font-weight:800;border-radius:99px;padding:2px 9px;margin-top:1px;color:#fff}
.vf-gchip.g1{background:var(--green)} .vf-gchip.g2{background:var(--teal)} .vf-gchip.g3{background:var(--accent)}
@media (max-width:1100px){.vf-groups{grid-template-columns:1fr}.vf-grid{grid-template-columns:1fr}}

/* ---------- Introduction page (/gioi-thieu) ---------- */
.in-hero{background:linear-gradient(120deg,#123c2b,#1d7a4c 60%,#2a9d63);color:#fff;border-radius:var(--r-lg);padding:44px 40px;margin-bottom:22px;position:relative;overflow:hidden}
.in-hero::after{content:"夢";position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:190px;font-weight:800;color:rgba(255,255,255,.08);line-height:1;pointer-events:none}
.in-kicker{letter-spacing:.22em;font-weight:800;font-size:12.5px;color:#bfe6cf;margin:0 0 12px}
.in-hero h1{font-size:31px;line-height:1.3;margin:0 0 14px;max-width:640px;position:relative;z-index:1}
.in-lead{font-size:16px;line-height:1.65;color:#e4f3ea;max-width:620px;margin:0 0 22px;position:relative;z-index:1}
.in-cta{display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:1}
.in-stats{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:26px}
.in-stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px 14px;text-align:center}
.in-stat b{display:block;font-size:24px;color:var(--green-dark,#14663c)}
.in-stat span{font-size:12.5px;color:var(--muted)}
.in-sec{margin:30px 0}
.in-sec h2{font-size:21px;margin:0 0 12px}
.in-sec p{line-height:1.7;color:var(--ink)}
.in-tl{display:flex;flex-direction:column;gap:0;margin-top:6px}
.in-step{display:flex;gap:16px;padding:14px 0;border-bottom:1px dashed var(--line)}
.in-step:last-child{border-bottom:none}
.in-year{flex:none;min-width:118px;font-weight:800;color:var(--green-dark,#14663c);font-size:14px;padding-top:2px}
.in-step h3{margin:0 0 4px;font-size:16px}
.in-step p{margin:0;color:var(--muted);line-height:1.65}
.ic-k{font-size:22px;font-weight:800;color:var(--green-dark,#14663c)}
.in-bottom{background:var(--navy-soft,#e8eef7);border-radius:var(--r-lg);padding:30px;text-align:center;margin:34px 0 10px}
.in-bottom h2{margin:0 0 8px;font-size:21px}
.in-bottom p{color:var(--muted);margin:0 auto 18px;max-width:520px;line-height:1.65}
@media (max-width:900px){.in-stats{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.in-hero{padding:30px 20px}.in-hero h1{font-size:24px}.in-step{flex-direction:column;gap:4px}.in-year{min-width:0}}

/* ---------- help page (FAQ accordion) ---------- */
.help-hero{margin-bottom:8px}
.help-cat{margin:26px 0 6px}
.help-cat h2{font-size:19px;margin:0 0 10px}
.faq{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);margin-bottom:8px;overflow:hidden}
.faq summary{cursor:pointer;padding:13px 16px;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:19px;font-weight:800;color:var(--green);flex:none;line-height:1}
.faq[open ] summary::after{content:"–"}
.faq summary:hover{color:var(--green)}
.faq-a{padding:0 16px 14px;color:var(--muted);line-height:1.65}
.help-contact{margin:30px 0 8px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface2);padding:22px;text-align:center}
.help-contact h2{margin:0 0 8px;font-size:19px}
.help-contact p{color:var(--muted);margin:0 auto 14px;max-width:560px;line-height:1.65}

/* ---------- bug report form ---------- */
.dlg-note{color:var(--muted);font-size:13px;line-height:1.55;margin:10px 0 0}
.bug-status{border-radius:var(--r-md);padding:10px 13px;font-weight:600;line-height:1.55;margin:0 0 12px}
.bug-status.ok{background:var(--green-soft);color:var(--green)}
.bug-status.err{background:#fdecec;color:#c0392b}

/* ---------- legal pages (terms / privacy) ---------- */
.legal{max-width:860px}
.legal h3{font-size:17px;margin:24px 0 8px}
.legal p{line-height:1.75;margin:0 0 10px}

/* ===== v0.4.30: newcomer guided tour (ported from the demo; first visit only) =====
   Layers sit above the drawer (z 90) and bottom tabs (z 70) but below native
   <dialog> top-layer elements (bug/ad-contact forms) and are sized/placed by
   app.js for desktop, tablet and phone layouts. */
.tour-dim{position:fixed;inset:0;z-index:286;display:none;background:rgba(7,13,9,.58)}
.tour-dim.on{display:block}
.tour-block{position:fixed;inset:0;z-index:287;display:none;background:transparent;touch-action:none}
.tour-block.on{display:block}
.tour-ring{position:fixed;z-index:289;display:none;border:3px solid var(--gold);border-radius:14px;box-shadow:0 0 0 9999px rgba(7,13,9,.58),0 0 22px rgba(200,137,10,.55);pointer-events:none;transition:left .3s ease,top .3s ease,width .3s ease,height .3s ease}
.tour-ring.on{display:block}
.tour-card{position:fixed;z-index:295;display:none;width:min(408px,calc(100vw - 24px));background:var(--surface);color:var(--ink);border:1.5px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);padding:20px;box-sizing:border-box;max-height:calc(100dvh - 24px);overflow-y:auto}
.tour-card.on{display:block}
.tour-kicker{font-size:10.5px;font-weight:800;letter-spacing:.1em;color:var(--gold);margin:0 0 6px}
.tour-card h3{margin:0 0 8px;font-size:19px;line-height:1.35;color:var(--ink)}
.tour-card p.tour-body{margin:0;font-size:14.5px;line-height:1.65;color:var(--ink2)}
.tour-card p.tour-note{display:none;margin:12px 0 0;background:var(--gold-soft);border:1px dashed var(--gold);border-radius:12px;padding:10px 12px;font-size:13px;line-height:1.6;font-weight:600;color:var(--ink2)}
.tour-card p.tour-note.show{display:block}
.tour-prog{height:6px;background:var(--surface2);border:1px solid var(--line);border-radius:99px;margin:16px 0 6px;overflow:hidden}
.tour-prog i{display:block;height:100%;width:0%;background:var(--green-dk);border-radius:99px;transition:width .3s ease}
.tour-steplb{font-size:12px;font-weight:700;color:var(--muted)}
.tour-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px;align-items:center}
.tour-actions .btn{min-height:44px;justify-content:center;padding:10px 18px}
.tour-skip{margin-left:auto;background:none;border:0;color:var(--muted);font-weight:700;font-size:13.5px;text-decoration:underline;text-underline-offset:3px;padding:10px 6px;cursor:pointer}
@media (max-width:640px){.tour-card{padding:16px}.tour-actions .btn{flex:1 1 auto}.tour-skip{margin-left:0}}

/* ===== v0.4.31: hard ad-block barrier (no skip; recheck only) ===== */
html.ab-lock{overflow:hidden}
.ab-overlay{position:fixed;inset:0;z-index:400;display:none;align-items:flex-start;justify-content:center;overflow-y:auto;background:rgba(7,13,9,.74);padding:20px 12px calc(20px + env(safe-area-inset-bottom))}
.ab-overlay.on{display:flex}
.ab-card{background:var(--surface);color:var(--ink);width:100%;max-width:560px;border-radius:var(--r-lg);box-shadow:var(--shadow-lg);padding:26px 24px;border:1.5px solid var(--line)}
.ab-ic{font-size:34px;line-height:1;color:var(--gold);text-align:center}
.ab-card h2{margin:10px 0 8px;font-size:22px;text-align:center;color:var(--ink)}
.ab-body{margin:0;font-size:14.5px;line-height:1.65;color:var(--ink2)}
.ab-card h3{margin:18px 0 8px;font-size:15px;color:var(--ink)}
.ab-step{border:1px solid var(--line);border-radius:12px;margin-bottom:8px;background:var(--surface)}
.ab-step summary{cursor:pointer;font-weight:800;font-size:14px;padding:11px 14px;color:var(--ink)}
.ab-step ol{margin:0;padding:0 16px 12px 34px;font-size:13.5px;line-height:1.6;color:var(--ink2)}
.ab-step li{margin-bottom:4px}
.ab-still{margin:14px 0 0;background:var(--gold-soft);border:1px dashed var(--gold);border-radius:12px;padding:10px 12px;font-size:13.5px;line-height:1.6;font-weight:600;color:var(--ink2)}
.ab-btn{width:100%;min-height:48px;justify-content:center;margin-top:16px;font-size:15px}
@media (max-width:640px){.ab-card{padding:20px 16px}.ab-card h2{font-size:20px}}

/* ===== v0.4.34: kanji cards like the demo (big red glyph, ON/KUN columns,
   meaning line, compounds + example under a dashed rule) ===== */
.kcard .kanji-big{font-size:58px;font-weight:900;line-height:1.1;color:var(--accent)}
.kcard .k-han{margin-top:2px;font-size:12.5px;font-weight:700;color:var(--muted)}
.kcard .on-kun{display:flex;gap:14px;margin-top:8px;font-size:13px;flex-wrap:wrap}
.kcard .on-kun>span{flex:1 1 118px;min-width:0}
.kcard .on-kun b{color:var(--muted);font-size:11px;letter-spacing:.06em;display:block;text-transform:uppercase;margin-bottom:2px}
.kcard .on-kun .k-val{font-weight:600;color:var(--ink);overflow-wrap:anywhere}
.kcard .k-mean{font-weight:600}
.kcard .k-comp{margin-top:11px;padding-top:11px;border-top:1px dashed var(--line);font-size:13.5px;line-height:1.7;color:var(--ink2)}
.kcard .k-comp .k-comp-h{color:var(--muted);font-size:11px;letter-spacing:.06em;display:block}
.kcard .k-comp .jp{color:var(--ink);font-weight:600}
.kcard .k-ex{margin-top:7px}
.kcard .k-comp .ex{margin:0;padding-top:0;border-top:0}

/* ===== v0.4.36: admin audit bot (furigana & meaning check) ===== */
.ax-tools{margin:14px 0 0}
.ack-filters{display:flex;flex-wrap:wrap;gap:10px;align-items:end;margin:14px 0 10px}
.ack-filters label{display:flex;flex-direction:column;gap:4px;font-size:12.5px;font-weight:700;color:var(--muted)}
.ack-filters select,.ack-filters input{padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink);font:inherit}
.ack-table-wrap{overflow-x:auto}
.ack-table{width:100%;border-collapse:collapse;font-size:13.5px}
.ack-table th,.ack-table td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.ack-table th{font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.ack-table td.jp,.ack-table .jp{font-family:"Noto Sans JP",sans-serif}

/* ---------- Ôn tập (review — self-generated sets) ---------- */
.rev-note{background:var(--gold-soft,#faf0d7);border:1px dashed var(--gold,#c77f06);color:var(--ink2);
  border-radius:var(--r-md);padding:12px 16px;font-size:13.5px;line-height:1.55}
.rev-config{margin-top:16px}
.rev-group{margin-bottom:18px}
.rev-lb{font-size:11.5px;font-weight:800;letter-spacing:.07em;color:var(--muted);margin-bottom:8px}
.rev-seg{display:flex;flex-wrap:wrap;gap:6px}
.rev-seg button{padding:8px 15px;border-radius:999px;border:1.5px solid var(--line);background:var(--surface);
  font-size:14px;font-weight:650;color:var(--ink2);cursor:pointer;font-family:inherit}
.rev-seg button.on{background:var(--green);border-color:var(--green);color:#fff;box-shadow:var(--shadow)}
.rev-2col{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}
.rev-gen-row{margin-top:4px}
.rev-run-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:14px 0 16px;flex-wrap:wrap}
.rev-progress{font-size:13.5px;font-weight:700;color:var(--muted)}
.revq{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);
  padding:18px;margin-bottom:14px}
.revq.is-ok{border-color:var(--green)}
.revq.is-bad{border-color:#d84541}
.revq-head{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.revq-head strong{font-size:14px}
.revq-tag{font-size:11px;font-weight:800;letter-spacing:.04em;color:var(--green-dk);background:var(--green-soft,#e2f2e8);
  border-radius:999px;padding:2px 9px;text-transform:uppercase}
.revq-tag.lv{color:var(--ink2);background:var(--surface2)}
.revq-q{font-family:"Noto Sans JP","Hiragino Sans",sans-serif;font-size:17px;line-height:1.75;margin-bottom:14px;overflow-wrap:break-word}
.rev-passage{background:var(--surface2);border:1px solid var(--line);border-radius:var(--r-md);padding:14px 16px;line-height:1.9}
.rev-opts{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.rev-opt{display:flex;align-items:center;gap:10px;text-align:left;padding:11px 13px;border-radius:var(--r-md);
  border:1.5px solid var(--line);background:var(--surface);font-size:15px;font-family:inherit;cursor:pointer;color:var(--ink)}
.rev-opt:hover{border-color:var(--green)}
.rev-opt .rev-opt-k{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;flex:none;
  border-radius:50%;background:var(--surface2);border:1px solid var(--line);font-size:12.5px;font-weight:800}
.rev-opt.sel{border-color:var(--green);background:var(--green-soft,#e2f2e8)}
.rev-opt.ok{border-color:var(--green);background:var(--green-soft,#e2f2e8);font-weight:700}
.rev-opt.ok .rev-opt-k{background:var(--green);color:#fff;border-color:var(--green)}
.rev-opt.bad{border-color:#d84541;background:#fdecea}
.rev-opt.bad .rev-opt-k{background:#d84541;color:#fff;border-color:#d84541}
.rev-opt.dim{opacity:.55}
.rev-opt:disabled{cursor:default}
.rev-explain{margin-top:13px;background:var(--surface2);border:1px dashed var(--line);border-radius:var(--r-md);
  padding:11px 14px;font-size:14px;line-height:1.6}
.rev-submit-row{text-align:center;margin:20px 0}
.rev-hero{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);
  padding:26px 20px;text-align:center;margin-bottom:16px}
.rev-hero-t{font-size:12px;font-weight:800;letter-spacing:.08em;color:var(--muted)}
.rev-score{font-size:52px;font-weight:900;color:var(--green-dk);line-height:1.15}
.rev-verdict{color:var(--muted);margin:8px 0 4px;font-size:15px}
.rev-stats{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.rev-stats .rs{background:var(--surface2);border:1px solid var(--line);border-radius:var(--r-md);padding:10px 18px;min-width:96px}
.rev-stats .rs b{display:block;font-size:21px}
.rev-stats .rs span{font-size:12px;color:var(--muted)}
.rev-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.rev-save-msg{font-size:13px;font-weight:700;color:var(--green-dk);margin:12px 0 0;min-height:1em}
.rev-wrong-h{margin:20px 0 10px}
.rev-wl{font-size:14px;line-height:1.6}
.rev-wl .bad-t{color:#b3352f;font-weight:650}
.rev-wl .ok-t{color:var(--green-dk);font-weight:650}
@media (max-width:640px){
  .rev-2col{grid-template-columns:1fr}
  .rev-opts{grid-template-columns:1fr}
  .revq-q{font-size:16px}
  .rev-score{font-size:42px}
}
.rev-timer{font-size:13.5px;font-weight:800;color:var(--green-dk);background:var(--green-soft,#e2f2e8);
  border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-variant-numeric:tabular-nums}
.rev-time{font-size:14px;font-weight:700;color:var(--ink2);margin:14px 0 0}
.rev-passage-panel{background:var(--surface2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px 16px;margin:18px 0 10px}
.rev-passage-panel .revq-tag{display:inline-block;margin-bottom:8px}
.rev-passage-text{line-height:1.9;font-size:16.5px}
.foot-fb{display:inline-flex;align-items:center;gap:8px;margin-top:12px;font-weight:700;color:var(--ink)}
.foot-fb:hover{color:#1877f2;text-decoration:none}
.fb-ic{display:inline-flex;width:22px;height:22px;border-radius:50%;background:#1877f2;color:#fff;
  align-items:center;justify-content:center;font-weight:900;font-size:14px;line-height:1}

/* Phrase entries (BJT keigo sentences, long compounds): the 26px word
   type is far too big for full sentences, and a sentence-long romaji
   string is one unbroken token that spilled out of the card. */
.vcard.phrase .word{font-size:19px;font-weight:600;line-height:1.55}
.vcard .romaji{overflow-wrap:anywhere}
.vcard.phrase .romaji{margin-top:3px}