/* ============================================================
   JLPT Study System — shared stylesheet
   Tokens live at :root. Dark mode follows the system setting and
   can be overridden per visitor with html[data-theme].
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho+B1:wght@500;700;800&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root{
  /* brand */
  --ai:#1E3A5F; --ai-2:#2F5687; --ai-soft:#E8EDF4;
  --shu:#C8102E; --shu-soft:#FBE9EC;
  --moss:#4F6B51; --moss-soft:#E9F0E9;
  --gold:#9C7A28; --gold-soft:#F7F0DF;
  --plum:#7A5C8F; --plum-soft:#F1EBF6;
  /* surfaces & ink */
  --ink:#15171C; --ink-2:#4B5160; --ink-3:#7C8393;
  --paper:#F4F5F8; --card:#FFFFFF; --card-2:#FAFBFD;
  --rule:#E2E5EC; --rule-2:#CFD4DE;
  --field:#FFFFFF;
  /* type */
  --serif:'Shippori Mincho B1',serif;
  --sans:'Noto Sans JP',system-ui,-apple-system,'Segoe UI',sans-serif;
  /* shape */
  --r-sm:8px; --r:12px; --r-lg:18px; --r-xl:24px; --radius:12px;
  --gutter:24px;
  --shadow-1:0 1px 2px rgba(21,23,28,.05),0 1px 3px rgba(21,23,28,.04);
  --shadow-2:0 2px 6px rgba(21,23,28,.06),0 12px 28px rgba(21,23,28,.07);
  --shadow-3:0 24px 60px rgba(21,23,28,.18);
  --ring:0 0 0 3px rgba(47,86,135,.28);
  --hero-1:#1E3A5F; --hero-2:#16304f; --hero-3:#0E2440;
  --shadow:var(--shadow-1);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ai:#8FB3DF; --ai-2:#A9C6EA; --ai-soft:#1B2739;
    --shu:#F2889A; --shu-soft:#332025;
    --moss:#9DBE9F; --moss-soft:#1E2A20;
    --gold:#D9B978; --gold-soft:#2E2716;
    --plum:#C3A6D8; --plum-soft:#271E2E;
    --ink:#EAECF1; --ink-2:#B4BAC7; --ink-3:#868D9C;
    --paper:#0E1015; --card:#171A21; --card-2:#1C2029;
    --rule:#282D38; --rule-2:#3A414F;
    --field:#12151B;
    --shadow-1:0 1px 2px rgba(0,0,0,.4);
    --shadow-2:0 2px 8px rgba(0,0,0,.45),0 16px 40px rgba(0,0,0,.35);
    --shadow-3:0 24px 60px rgba(0,0,0,.6);
    --ring:0 0 0 3px rgba(143,179,223,.32);
    --hero-1:#16233A; --hero-2:#111B2E; --hero-3:#0C1524;
  }
}
:root[data-theme="dark"]{
  --ai:#8FB3DF; --ai-2:#A9C6EA; --ai-soft:#1B2739;
  --shu:#F2889A; --shu-soft:#332025;
  --moss:#9DBE9F; --moss-soft:#1E2A20;
  --gold:#D9B978; --gold-soft:#2E2716;
  --plum:#C3A6D8; --plum-soft:#271E2E;
  --ink:#EAECF1; --ink-2:#B4BAC7; --ink-3:#868D9C;
  --paper:#0E1015; --card:#171A21; --card-2:#1C2029;
  --rule:#282D38; --rule-2:#3A414F;
  --field:#12151B;
  --shadow-1:0 1px 2px rgba(0,0,0,.4);
  --shadow-2:0 2px 8px rgba(0,0,0,.45),0 16px 40px rgba(0,0,0,.35);
  --shadow-3:0 24px 60px rgba(0,0,0,.6);
  --ring:0 0 0 3px rgba(143,179,223,.32);
  --hero-1:#16233A; --hero-2:#111B2E; --hero-3:#0C1524;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.6;
  -webkit-font-smoothing:antialiased;font-size:16px}
img{max-width:100%;display:block}
button,input,select{font-family:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:6px}
::selection{background:var(--ai-soft);color:var(--ink)}
.wrap{max-width:1200px;margin:0 auto;padding:0 var(--gutter)}

/* ---------- level header ---------- */
.top{background:linear-gradient(135deg,var(--hero-1),var(--hero-2) 60%,var(--hero-3));
  color:#fff;padding:26px 0;position:relative;overflow:hidden}
.top::after{content:"";position:absolute;right:-90px;top:-120px;width:340px;height:340px;
  border-radius:50%;background:rgba(255,255,255,.05)}
.top .wrap{display:flex;align-items:center;gap:18px;flex-wrap:wrap;position:relative;z-index:1}
.top .brand{display:flex;flex-direction:column;gap:2px;min-width:0}
.top .eyebrow{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:#9DB4CF}
.top h1{font-family:var(--serif);font-weight:800;font-size:clamp(20px,2.6vw,27px);line-height:1.2}
.top .jp{font-family:var(--serif);font-size:13px;color:#C3D2E3}
.top .back{border:1px solid rgba(255,255,255,.3);border-radius:999px;
  padding:9px 17px;font-size:13px;font-weight:500;transition:background .18s,border-color .18s}
.top .back:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.55)}
.top .spacer{margin-left:auto}
.lvbadge{flex:0 0 auto;width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
  font-family:var(--serif);font-weight:800;font-size:21px;color:#fff;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28),0 6px 18px rgba(0,0,0,.24)}

/* ---------- theme toggle ---------- */
.theme-btn{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.3);color:#fff;font-size:16px;line-height:1;
  transition:background .18s,transform .18s}
.theme-btn:hover{background:rgba(255,255,255,.16);transform:rotate(-18deg)}
.theme-btn .moon{display:none}
:root[data-theme="dark"] .theme-btn .moon{display:inline}
:root[data-theme="dark"] .theme-btn .sun{display:none}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .theme-btn .moon{display:inline}
  :root:not([data-theme="light"]) .theme-btn .sun{display:none}
}

/* ---------- section nav ---------- */
.appnav{position:sticky;top:0;z-index:50;background:var(--card);
  background:color-mix(in srgb,var(--card) 88%,transparent);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--rule)}
.appnav-inner{max-width:1200px;margin:0 auto;display:flex;gap:4px;padding:9px 16px;
  overflow-x:auto;scrollbar-width:none}
.appnav-inner::-webkit-scrollbar{display:none}
.appnav button{flex:0 0 auto;padding:9px 15px;font-size:13.5px;font-weight:600;color:var(--ink-3);
  border-radius:999px;transition:color .16s,background .16s;white-space:nowrap}
.appnav button:hover{color:var(--ink);background:var(--paper)}
.appnav button.on{color:#fff;background:var(--ai)}
:root[data-theme="dark"] .appnav button.on{color:#0E1015}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .appnav button.on{color:#0E1015}}
.appnav button em{font-style:normal;font-weight:500;font-size:11px;opacity:.72;margin-left:6px}
.view[hidden]{display:none}
main{padding:30px 0 72px}

/* ---------- section heads ---------- */
.sec-head{margin-bottom:20px;padding-bottom:18px;border-bottom:1px solid var(--rule)}
.sec-head h2{font-family:var(--serif);font-weight:800;font-size:clamp(22px,3vw,31px);letter-spacing:-.01em}
.sec-head h2 span{font-weight:500;color:var(--ink-3);font-size:.55em;margin-left:10px;letter-spacing:0}
.sec-head p{color:var(--ink-2);font-size:14.5px;margin-top:8px;max-width:74ch}

/* ---------- toolbars ---------- */
.tools{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 20px;align-items:center}
.tools input[type=search]{flex:1;min-width:210px;max-width:420px;padding:11px 15px;
  border:1px solid var(--rule-2);border-radius:999px;font-size:14px;background:var(--field);
  transition:border-color .16s,box-shadow .16s}
.tools input[type=search]:focus{border-color:var(--ai);box-shadow:var(--ring);outline:none}
.btn{border:1px solid var(--rule-2);background:var(--card);border-radius:999px;padding:10px 16px;
  font-size:13px;font-weight:600;color:var(--ink-2);transition:background .16s,border-color .16s,color .16s}
.btn:hover{background:var(--paper);border-color:var(--ink-3);color:var(--ink)}
.btn.primary{background:var(--ai);border-color:var(--ai);color:#fff}
:root[data-theme="dark"] .btn.primary{color:#0E1015}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn.primary{color:#0E1015}}
.btn.primary:hover{filter:brightness(1.08);border-color:var(--ai)}
.btn.on{background:var(--ai);border-color:var(--ai);color:#fff}
:root[data-theme="dark"] .btn.on{color:#0E1015}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn.on{color:#0E1015}}
.seg{display:inline-flex;gap:4px;background:var(--paper);border:1px solid var(--rule);
  border-radius:999px;padding:3px}
.seg .btn{border:0;background:none;padding:8px 14px}
.seg .btn:hover{background:var(--card)}
.seg .btn.on{background:var(--ai);color:#fff}
:root[data-theme="dark"] .seg .btn.on{color:#0E1015}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .seg .btn.on{color:#0E1015}}
.cnt{font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}
select.voice-sel{border:1px solid var(--rule-2);border-radius:999px;padding:10px 14px;font-size:13px;
  background:var(--field);max-width:230px;color:var(--ink-2)}

/* ---------- tables ---------- */
table{width:100%;border-collapse:collapse;font-size:16px}
th{text-align:left;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  font-weight:600;padding:0 10px 10px;border-bottom:1px solid var(--rule-2);white-space:nowrap}
td{padding:11px 10px;border-bottom:1px solid var(--rule);vertical-align:top}
tbody tr:last-child td{border-bottom:0}
tbody tr{transition:background .12s}
tbody tr:hover{background:var(--card-2)}
td.w{font-family:var(--serif);font-weight:700;font-size:19px;white-space:nowrap;cursor:pointer}
td.w:hover{color:var(--ai)}
td.w .say{margin-left:6px;font-size:11px;opacity:.35}
td.w:hover .say{opacity:1}
td.r{color:var(--ai);font-size:15px;white-space:nowrap}
td.m{color:var(--ink-2);font-size:15.5px;line-height:1.55}
td.pos{color:var(--ink-3);font-size:12px;white-space:nowrap}
td.ta{color:var(--moss);font-size:14px}
.hide-r td.r,.hide-m td.m{color:transparent;background:var(--paper);border-radius:6px;cursor:pointer}
.hide-r td.r.show,.hide-m td.m.show{color:inherit;background:none}

/* ---------- accordions ---------- */
.acc{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);
  margin-bottom:12px;box-shadow:var(--shadow-1);overflow:hidden;transition:box-shadow .18s,border-color .18s}
.acc.open{box-shadow:var(--shadow-2);border-color:var(--rule-2)}
.acc-head{width:100%;display:flex;align-items:center;gap:12px;padding:16px 22px;text-align:left}
.acc-head:hover{background:var(--card-2)}
.acc-head .jp{font-family:var(--serif);font-weight:700;font-size:16.5px;color:var(--ai)}
.acc-head .en{font-weight:600;font-size:15px}
.acc-head .num{margin-left:auto;font-size:11.5px;font-weight:600;color:var(--ink-3);
  background:var(--paper);border-radius:999px;padding:4px 11px;white-space:nowrap}
.acc-head .arr{font-size:10px;color:var(--ink-3);transition:transform .2s}
.acc.open .acc-head .arr{transform:rotate(90deg)}
.acc-note{font-size:13px;color:var(--ink-2);padding:0 22px 14px;display:none;line-height:1.65;
  max-width:80ch}
.note-ta{display:block;margin-top:5px;color:var(--moss);font-size:13px;line-height:1.7}
.m-ta{display:block;margin-top:2px;color:var(--moss);font-size:13.5px;line-height:1.5}
.acc-body{display:none;padding:0 22px 20px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.acc.open .acc-body,.acc.open .acc-note{display:block}
.empty{color:var(--ink-3);font-size:14px;padding:34px;text-align:center;background:var(--card);
  border:1px dashed var(--rule-2);border-radius:var(--r-lg)}

/* ---------- vocabulary bank ---------- */
.bk-index{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 20px}
.bk-index a{font-family:var(--serif);font-size:15px;font-weight:700;color:var(--ai);
  background:var(--card);border:1px solid var(--rule);border-radius:10px;
  width:40px;height:40px;display:grid;place-items:center;transition:background .16s,transform .16s}
.bk-index a:hover{background:var(--ai);color:#fff;transform:translateY(-2px)}
:root[data-theme="dark"] .bk-index a:hover{color:#0E1015}
.bk-grp{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);
  margin-bottom:14px;box-shadow:var(--shadow-1);overflow:hidden;scroll-margin-top:72px}
.bk-h{display:flex;align-items:center;gap:10px;padding:14px 22px;border-bottom:1px solid var(--rule);
  background:var(--card-2)}
.bk-h span{font-family:var(--serif);font-weight:800;font-size:17px;color:var(--ai)}
.bk-h em{font-style:normal;margin-left:auto;font-size:11.5px;font-weight:600;color:var(--ink-3);
  background:var(--paper);border-radius:999px;padding:4px 11px}
.bk-tbl{padding:6px 22px 16px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.bk-tbl th{padding-top:12px}
/* fixed proportions keep long set phrases from stretching the word column */
.bk-tbl table{table-layout:fixed;min-width:600px}
.bk-tbl th:nth-child(1),.bk-tbl td:nth-child(1){width:27%}
.bk-tbl th:nth-child(2),.bk-tbl td:nth-child(2){width:21%}
.bk-tbl th:nth-child(3),.bk-tbl td:nth-child(3){width:33%}
.bk-tbl th:nth-child(4),.bk-tbl td:nth-child(4){width:19%}
.bk-tbl td.w{white-space:normal;overflow-wrap:anywhere;line-height:1.45}
.bk-tbl td.r{white-space:normal;overflow-wrap:anywhere}
td.src{white-space:normal}
.tag{display:inline-block;font-size:11px;font-weight:600;color:var(--ink-2);background:var(--paper);
  border:1px solid var(--rule);border-radius:999px;padding:3px 9px;margin:0 4px 4px 0;line-height:1.5}

/* ---------- kanji grid ---------- */
.kgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(152px,1fr));gap:12px}
.k{border:1px solid var(--rule);border-radius:var(--r);padding:16px 12px;text-align:center;
  background:var(--card);cursor:pointer;min-width:0;
  transition:transform .16s,box-shadow .16s,border-color .16s}
.k:hover,.k:focus-visible{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--ai)}
.k .ch{font-family:var(--serif);font-size:44px;line-height:1;font-weight:700;color:var(--ai)}
.k .rd{font-size:12px;color:var(--ai);margin-top:10px;line-height:1.45;word-break:break-all;opacity:.9}
.k .mn{font-size:12.5px;color:var(--ink-2);margin-top:6px;line-height:1.45;
  overflow-wrap:anywhere;hyphens:auto}
.k .st{font-size:10.5px;color:var(--ink-3);margin-top:9px;border-top:1px dashed var(--rule);padding-top:7px}

/* ---------- kanji panel ---------- */
body.lock{overflow:hidden}
.kp-ov{position:fixed;inset:0;background:rgba(10,12,16,.5);opacity:0;pointer-events:none;
  transition:opacity .25s;z-index:60;backdrop-filter:blur(2px)}
.kp-ov.open{opacity:1;pointer-events:auto}
.kp{position:fixed;top:0;right:0;bottom:0;width:420px;max-width:92vw;background:var(--card);z-index:61;
  box-shadow:var(--shadow-3);transform:translateX(102%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;padding:30px 26px 40px;border-left:1px solid var(--rule)}
.kp.open{transform:translateX(0)}
.kp-x{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;
  display:grid;place-items:center;color:var(--ink-3);border:1px solid var(--rule)}
.kp-x:hover{background:var(--paper);color:var(--ink)}
.kp-ch{font-family:var(--serif);font-weight:800;font-size:78px;line-height:1;text-align:center;
  color:var(--ai);margin-bottom:18px}
.kp-stroke{display:flex;justify-content:center;margin-bottom:20px}
.kp-stroke img{width:184px;height:184px;border:1px solid var(--rule);border-radius:16px;
  background:#fff;padding:12px}
.kp-fb{width:184px;height:184px;border:1px dashed var(--rule-2);border-radius:16px;display:grid;
  place-items:center;text-align:center;font-size:12.5px;color:var(--ink-3);padding:16px}
.kp-rd{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px}
.kp-blk{background:var(--paper);border-radius:var(--r);padding:12px}
.kp-lb{display:block;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-bottom:6px}
.kp-val{font-size:15px;line-height:1.45;word-break:break-all}
.kp-mn{font-size:16px;color:var(--ink-2);text-align:center;margin-bottom:18px;padding-bottom:18px;
  border-bottom:1px solid var(--rule)}
.kp-h{font-family:var(--serif);font-size:15px;margin-bottom:10px;display:flex;align-items:baseline;gap:8px}
.kp-h small{font-family:var(--sans);font-size:12px;color:var(--ink-3);font-weight:400}
.kp-w{padding:11px;border-radius:var(--r-sm);cursor:pointer;border-bottom:1px solid var(--rule)}
.kp-w:hover{background:var(--ai-soft)}
.kp-w .a{font-family:var(--serif);font-weight:700;font-size:16px}
.kp-w .b{color:var(--ai);font-size:13px;margin-left:6px}
.kp-w .c{display:block;font-size:13px;color:var(--ink-2);margin-top:3px}

/* ---------- quiz ---------- */
.qz-intro{padding:6px 0;font-size:15px;color:var(--ink-2);line-height:1.7;max-width:66ch}
.qz-intro b{color:var(--ink)}
.qz-opts-row{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}
.qz-progress{font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  margin-bottom:14px;font-weight:600}
.qz-card{border:1px solid var(--rule);background:var(--card);border-radius:var(--r-xl);padding:34px 24px;
  text-align:center;position:relative;max-width:640px;box-shadow:var(--shadow-2)}
.qz-ch{font-family:var(--serif);font-size:62px;font-weight:700;color:var(--ai);line-height:1.15;
  margin-bottom:10px;word-break:break-all}
.qz-ch.sm{font-size:28px}
.qz-prompt{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);
  margin-bottom:22px;font-weight:600}
.qz-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.qz-opt{border:1px solid var(--rule-2);background:var(--card-2);border-radius:var(--r);padding:13px 15px;
  font-size:15px;text-align:left;transition:background .14s,border-color .14s,transform .14s}
.qz-opt:hover:not([disabled]){background:var(--ai-soft);border-color:var(--ai);transform:translateY(-1px)}
.qz-opt.kanji{font-family:var(--serif);font-size:27px;font-weight:700;text-align:center}
.qz-opt.word{font-family:var(--serif);font-size:17px;font-weight:700}
.qz-opt.correct{border-color:var(--moss);background:var(--moss-soft);color:var(--moss);font-weight:700}
.qz-opt.wrong{border-color:var(--shu);background:var(--shu-soft);color:var(--shu);font-weight:700}
.qz-opt[disabled]{cursor:default}
.qz-speak{position:absolute;top:16px;right:16px;display:inline-grid;place-items:center;
  width:38px;height:38px;border-radius:50%;border:1px solid var(--rule)}
.qz-speak:hover{background:var(--paper);border-color:var(--ai)}
.qz-next{margin-top:22px}
.qz-result{text-align:center;padding:24px 0}
.qz-score{font-family:var(--serif);font-weight:800;font-size:52px;color:var(--ai);margin-bottom:8px}
.qz-result p{color:var(--ink-2);font-size:14.5px;margin-bottom:18px}

/* ---------- reading ---------- */
/* 60-day plan overview table (N2) */
.plan-tbl td.pl-day{color:var(--ink-3);font-size:12px;font-weight:600;white-space:nowrap}
.plan-tbl td.pl-n{color:var(--ink-3);font-size:12px;white-space:nowrap;
  font-variant-numeric:tabular-nums}

.rd-stats{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 20px}
.rd-stats span{font-size:13px;background:var(--card);border:1px solid var(--rule);border-radius:999px;
  padding:8px 16px;color:var(--ink-2);box-shadow:var(--shadow-1)}
.rd-stats b{color:var(--ai);font-variant-numeric:tabular-nums}
.lv{flex:0 0 auto;font-size:10.5px;font-weight:800;letter-spacing:.08em;border-radius:7px;padding:4px 10px}
.lv.n5,.lv.n4{background:var(--moss-soft);color:var(--moss)}
.lv.n3{background:var(--gold-soft);color:var(--gold)}
.lv.n2{background:var(--ai-soft);color:var(--ai)}
.lv.n1{background:var(--shu-soft);color:var(--shu)}
.passage{font-family:var(--serif);font-size:16.5px;line-height:2.05;background:var(--paper);
  border-radius:var(--r);padding:22px;margin-bottom:20px;border:1px solid var(--rule)}
.passage p+p{margin-top:1em}
.rd-q{border-top:1px solid var(--rule);padding:18px 0 4px}
.rd-q-p{font-weight:700;font-size:15.5px;margin-bottom:13px;line-height:1.65}
.rd-q-p .qn{color:var(--ai);font-family:var(--serif);margin-right:8px}
.rd-opts{display:grid;gap:8px}
.rd-opt{display:flex;gap:11px;align-items:flex-start;border:1px solid var(--rule-2);
  background:var(--card-2);border-radius:var(--r);padding:12px 15px;font-size:15px;text-align:left;
  transition:background .14s,border-color .14s}
.rd-opt i{font-style:normal;font-family:var(--serif);font-weight:700;color:var(--ink-3);flex:0 0 auto}
.rd-opt:hover:not([disabled]){background:var(--ai-soft);border-color:var(--ai)}
.rd-opt.correct{border-color:var(--moss);background:var(--moss-soft)}
.rd-opt.correct,.rd-opt.correct i{color:var(--moss);font-weight:700}
.rd-opt.wrong{border-color:var(--shu);background:var(--shu-soft)}
.rd-opt.wrong,.rd-opt.wrong i{color:var(--shu);font-weight:700}
.rd-opt[disabled]{cursor:default}
.expl{display:none;margin-top:13px;font-size:14px;color:var(--ink-2);background:var(--gold-soft);
  border-left:3px solid var(--gold);border-radius:0 var(--r-sm) var(--r-sm) 0;padding:13px 16px;line-height:1.7}
.expl.show{display:block}

/* ---------- keigo & scenarios ---------- */
.keigo-tbl{font-size:15px}
.keigo-tbl th{white-space:nowrap}
.keigo-tbl td{font-size:15px}
.keigo-tbl .pl{font-family:var(--serif);font-weight:700;font-size:17px;white-space:nowrap}
.keigo-tbl .so{color:var(--ai)}
.keigo-tbl .ke{color:var(--shu)}
.keigo-tbl .nt{font-size:12.5px;color:var(--ink-3);line-height:1.55}
.sit-jp{font-family:var(--serif);font-size:16.5px;line-height:2.05;background:var(--paper);
  border-radius:var(--r);padding:22px;margin-bottom:18px;white-space:pre-line;border:1px solid var(--rule)}
.sit-voc{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.sit-voc span{font-size:13px;background:var(--ai-soft);color:var(--ai);border-radius:999px;padding:6px 13px}

/* ---------- dashboard ---------- */
.hero{background:linear-gradient(155deg,var(--hero-1) 0%,var(--hero-2) 55%,var(--hero-3) 100%);
  color:#fff;padding:76px 0 92px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(60% 70% at 50% 0%,rgba(255,255,255,.09),transparent 70%)}
.hero .wrap{position:relative;z-index:1}
.hero h1{font-family:var(--serif);font-weight:800;font-size:clamp(30px,5vw,48px);line-height:1.14;
  letter-spacing:-.015em}
.hero .jp{font-family:var(--serif);font-size:clamp(14px,2vw,18px);color:#C3D2E3;margin-top:10px}
.hero p{color:#BCCADD;font-size:15px;max-width:64ch;margin:18px auto 0;line-height:1.75}
.hero .stats{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:28px}
.hero .stats span{font-size:12.5px;font-weight:500;background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:8px 17px}
.hero .theme-btn{position:absolute;top:22px;right:24px;z-index:2}
.grid-lv{display:grid;grid-template-columns:repeat(auto-fit,minmax(276px,1fr));gap:20px;margin:-46px 0 0}
.lvcard{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-xl);padding:26px;
  display:flex;flex-direction:column;gap:16px;box-shadow:var(--shadow-2);position:relative;
  border-top:4px solid var(--ai);transition:transform .2s,box-shadow .2s}
.lvcard:hover{transform:translateY(-5px);box-shadow:var(--shadow-3)}
.lvcard .row{display:flex;align-items:center;gap:15px}
.lvcard .bdg{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;
  font-family:var(--serif);font-weight:800;font-size:21px;color:#fff;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.lvcard h3{font-family:var(--serif);font-weight:800;font-size:21px;line-height:1.2}
.lvcard .sub{font-size:12.5px;color:var(--ink-3);margin-top:3px}
.lvcard .desc{font-size:14px;color:var(--ink-2);line-height:1.7;flex:1}
.lvcard .meta{display:flex;flex-wrap:wrap;gap:7px}
.lvcard .meta span{font-size:11.5px;font-weight:500;background:var(--paper);color:var(--ink-2);
  border:1px solid var(--rule);border-radius:999px;padding:5px 12px}
.lvcard .go{font-size:13.5px;font-weight:700;color:var(--ai);display:flex;align-items:center;gap:6px;
  transition:gap .18s}
.lvcard:hover .go{gap:11px}
.dash-sec{margin-top:56px}
.dash-sec h2{font-family:var(--serif);font-weight:800;font-size:24px;margin-bottom:8px}
.dash-sec p{color:var(--ink-2);font-size:14.5px;margin-bottom:20px;max-width:74ch}
.howto{display:grid;grid-template-columns:repeat(auto-fit,minmax(236px,1fr));gap:16px}
.howto div{background:var(--card);border:1px solid var(--rule);border-radius:var(--r-lg);padding:20px;
  box-shadow:var(--shadow-1)}
.howto b{display:block;font-family:var(--serif);font-size:16px;margin-bottom:7px;color:var(--ai)}
.howto p{font-size:13.5px;color:var(--ink-2);margin:0;line-height:1.65}
.foot{text-align:center;color:var(--ink-3);font-size:13px;padding:44px 24px 34px;line-height:1.8;
  border-top:1px solid var(--rule);margin-top:56px}
.foot a{color:var(--ai);font-weight:600}

/* ---------- print ---------- */
@media print{
  .top,.appnav,.tools,.hero,.foot,.kp,.kp-ov,.acc-head .arr,.acc-head .num,
  .rd-stats,.qz-intro,.say,.dash-sec,.howto,.bk-index,.theme-btn,td.src,th.src{display:none!important}
  body{background:#fff;color:#000}
  .wrap{max-width:100%;padding:0}
  main{padding:0}
  .view[hidden]{display:none!important}
  .acc,.acc-body,.acc-note,.bk-grp,.bk-tbl{display:block!important;border:0;box-shadow:none;
    padding-left:0;padding-right:0}
  .acc-head,.bk-h{padding-left:0;border-bottom:1.5px solid #000;margin-bottom:8px;background:none!important}
  .acc *,.k,.k *,.bk-grp *{background:none!important;color:#000!important;border-color:#000!important;
    box-shadow:none!important}
  th{border-bottom:1px solid #000}
  td{border-bottom:1px solid #999}
  tr,.k{page-break-inside:avoid}
  .kgrid{grid-template-columns:repeat(6,1fr)}
}

/* ---------- quiz setup ---------- */
.qz-setup{max-width:680px}
.qz-field{margin-bottom:20px}
.qz-lb{display:block;font-size:11px;letter-spacing:.11em;text-transform:uppercase;
  color:var(--ink-3);font-weight:700;margin-bottom:9px}
.qz-lb small{font-weight:500;letter-spacing:0;text-transform:none;font-size:11.5px;margin-left:8px;
  opacity:.8}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1px solid var(--rule-2);background:var(--card);border-radius:999px;padding:10px 15px;
  font-size:13px;font-weight:600;color:var(--ink-2);
  transition:background .16s,border-color .16s,color .16s}
.chip:hover{border-color:var(--ink-3);color:var(--ink)}
.chip.on{background:var(--ai);border-color:var(--ai);color:#fff}
:root[data-theme="dark"] .chip.on{color:#0E1015}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .chip.on{color:#0E1015}}
.chip.on::before{content:"✓";font-weight:800;margin-right:6px}
.qz-count{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.qz-count input[type=number]{width:106px;padding:10px 12px;border:1px solid var(--rule-2);
  border-radius:999px;background:var(--field);font-size:14px;text-align:center}
.qz-count input[type=number]:focus{border-color:var(--ai);box-shadow:var(--ring);outline:none}
.qz-start{min-width:170px}
.qz-start[disabled],.seg .btn[disabled]{opacity:.42;cursor:default}
.qz-hint{font-size:12.5px;color:var(--ink-3);margin-top:10px}

/* ---------- flashcards ---------- */
#fcGroup{border:1px solid var(--rule-2);border-radius:999px;padding:10px 14px;font-size:13px;
  background:var(--field);color:var(--ink-2);max-width:260px}
#fcGroup[hidden]{display:none}
.fc-opts{margin-bottom:18px}
.fc-opts>summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:9px;
  font-size:11.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);
  border:1px solid var(--rule);background:var(--card);border-radius:999px;padding:10px 17px;
  transition:color .16s,border-color .16s}
.fc-opts>summary::-webkit-details-marker{display:none}
.fc-opts>summary::after{content:"▾";font-size:11px;transition:transform .2s}
.fc-opts[open]>summary::after{transform:rotate(180deg)}
.fc-opts>summary:hover{color:var(--ink);border-color:var(--ink-3)}
.fc-opts .tools{margin:14px 0 0}
/* The card is the thing you actually stare at, so it grows with the viewport
   rather than sitting at one fixed width. Every value below is clamped: the
   lower bound is what a ~900px window gets, the upper bound stops it becoming
   comical on an ultrawide. The ≤768px block further down overrides all of it. */
.fc-host{max-width:min(100%,1040px)}
.fc-meta{display:flex;align-items:baseline;gap:12px;font-size:clamp(12.5px,1vw,15px);
  color:var(--ink-3);margin-bottom:10px}
.fc-score{margin-left:auto;font-weight:700;color:var(--ai);font-variant-numeric:tabular-nums}
.fc-prog{height:clamp(4px,.4vw,6px);border-radius:3px;background:var(--rule);overflow:hidden;
  margin-bottom:clamp(16px,1.6vw,24px)}
.fc-prog i{display:block;height:100%;background:var(--ai);transition:width .25s}
.fc-card{perspective:1600px;cursor:pointer;margin-bottom:clamp(16px,1.6vw,24px);
  -webkit-tap-highlight-color:transparent}
.fc-in{position:relative;width:100%;min-height:clamp(300px,38vw,580px);transform-style:preserve-3d;
  transition:transform .5s cubic-bezier(.4,0,.2,1)}
.fc-card.flipped .fc-in{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:clamp(10px,1vw,16px);
  border:1px solid var(--rule);border-radius:var(--r-xl);background:var(--card);
  box-shadow:var(--shadow-2);text-align:center;overflow:auto;
  padding:clamp(30px,3vw,48px) clamp(24px,3vw,44px) clamp(34px,3.4vw,54px)}
.fc-b{transform:rotateY(180deg);background:var(--card-2)}
.fc-jp{font-family:var(--serif);font-weight:700;font-size:clamp(42px,4.6vw,82px);line-height:1.25;
  overflow-wrap:anywhere}
.fc-jp.big{font-size:clamp(92px,12vw,220px);line-height:1;color:var(--ai)}
.fc-rd{font-family:var(--serif);font-size:clamp(20px,1.9vw,34px);color:var(--ai)}
.fc-en{font-size:clamp(22px,2.2vw,38px);color:var(--ink-2);line-height:1.45}
.fc-ta{font-size:clamp(18px,1.7vw,29px);color:var(--moss);line-height:1.45}
.fc-x{font-size:clamp(13px,1.15vw,19px);color:var(--ink-3)}
/* speaker on the card face — sits above the flip handler, never flips the card */
.fc-hear{position:absolute;top:clamp(14px,1.4vw,22px);right:clamp(14px,1.4vw,22px);
  width:clamp(44px,3.6vw,58px);height:clamp(44px,3.6vw,58px);border-radius:50%;
  display:grid;place-items:center;font-size:clamp(17px,1.5vw,23px);line-height:1;
  border:1px solid var(--rule-2);background:var(--card-2);color:var(--ink-2);z-index:2;
  transition:background .16s,border-color .16s,transform .16s}
.fc-hear:hover{background:var(--ai-soft);border-color:var(--ai);color:var(--ai);transform:scale(1.06)}
.fc-hear:active{transform:scale(.96)}
.fc-tap{position:absolute;bottom:clamp(13px,1.3vw,20px);left:0;right:0;
  font-size:clamp(10px,.8vw,13px);letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-3);opacity:.55}
.fc-bar{display:flex;flex-wrap:wrap;gap:clamp(10px,1vw,14px);align-items:center}
.fc-bar .btn{min-height:clamp(46px,3.6vw,58px);font-size:clamp(13px,1.05vw,16px)}
.fc-bar .btn[data-act="flip"]{flex:1}
.fc-bar .btn[data-act="prev"],.fc-bar .btn[data-act="next"]{min-width:clamp(58px,4.6vw,78px);
  font-size:clamp(17px,1.4vw,22px)}
.fc-bar .fc-yes,.fc-bar .fc-no{flex:1}
.fc-bar .fc-yes{background:var(--moss);border-color:var(--moss);color:#fff}
:root[data-theme="dark"] .fc-bar .fc-yes{color:#0E1015}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .fc-bar .fc-yes{color:#0E1015}}
.fc-bar .fc-no{background:var(--card);border-color:var(--shu);color:var(--shu)}
.fc-done{text-align:center;padding:18px 0}
.fc-done p{color:var(--ink-2);font-size:14.5px;margin-bottom:18px}
.fc-done .fc-bar{justify-content:center}

/* ---------- responsive ---------- */

/* Touch devices: kill sticky hover transforms, add press feedback. */
@media (hover:none){
  .lvcard:hover{transform:none;box-shadow:var(--shadow-2)}
  .k:hover{transform:none;box-shadow:none;border-color:var(--rule)}
  .bk-index a:hover{transform:none;background:var(--card);color:var(--ai)}
  tbody tr:hover{background:none}
  .acc-head:hover,.btn:hover,.kp-w:hover{background:none}
  .btn:active{background:var(--paper);transform:scale(.98)}
  .lvcard:active{transform:scale(.99)}
  .k:active{transform:scale(.96);border-color:var(--ai)}
  .acc-head:active{background:var(--card-2)}
  .qz-opt:active:not([disabled]),.rd-opt:active:not([disabled]){transform:scale(.99);background:var(--ai-soft)}
  .kp-w:active{background:var(--ai-soft)}
}

@media (max-width:900px){
  .kp{width:400px}
}

/* ============================================================
   Phone / small tablet — app shell.
   The top bar shrinks to a title bar, the section nav moves to a
   fixed bottom tab bar, and every data table becomes a stacked
   list so nothing scrolls sideways.
   ============================================================ */
@media (max-width:768px){
  :root{--navh:58px;--gutter:14px}
  main{padding:18px 0 calc(var(--navh) + 26px + env(safe-area-inset-bottom))}
  body:has(.appnav) .foot{padding-bottom:calc(var(--navh) + 30px + env(safe-area-inset-bottom))}

  /* ---- compact title bar ---- */
  .top{padding:12px 0}
  .top::after{display:none}
  .top .wrap{gap:11px;flex-wrap:nowrap}
  .top .brand{flex:1 1 auto}
  .top .eyebrow{display:none}
  .top h1{font-size:18px}
  .top .jp{font-size:11.5px}
  .top .spacer{display:none}
  .lvbadge{width:40px;height:40px;font-size:15px;border-radius:12px;
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.28)}
  .top .back{flex:0 0 auto;width:38px;height:38px;padding:0;display:grid;place-items:center;
    font-size:15px;border-radius:50%}
  .top .back .back-t{display:none}
  .theme-btn{width:38px;height:38px}
  .theme-btn:hover{transform:none}

  /* ---- bottom tab bar ---- */
  .appnav{position:fixed;top:auto;bottom:0;left:0;right:0;z-index:55;
    border-bottom:0;border-top:1px solid var(--rule);
    background:var(--card);
    background:color-mix(in srgb,var(--card) 94%,transparent);
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -2px 16px rgba(21,23,28,.07)}
  .appnav-inner{padding:0;gap:0;overflow:visible}
  .appnav button{flex:1 1 0;min-width:0;height:var(--navh);padding:7px 2px;border-radius:0;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    color:var(--ink-3);transition:color .16s}
  .appnav button::before{content:attr(data-icon);font-family:var(--serif);font-size:19px;
    font-weight:700;line-height:1}
  .appnav button::after{content:attr(data-short);font-size:9.5px;font-weight:600;line-height:1.15;
    max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .appnav button .nv-t,.appnav button em{display:none}
  .appnav button:hover{background:none;color:var(--ink-3)}
  /* beat the dark-mode .on override, which assumes a filled pill */
  :root[data-theme] .appnav button.on,
  :root:not([data-theme]) .appnav button.on{
    color:var(--ai);background:none;box-shadow:inset 0 2px 0 var(--ai)}

  /* ---- section heads & toolbars ---- */
  .sec-head{margin-bottom:14px;padding-bottom:13px}
  .sec-head p{font-size:13.5px;margin-top:6px}
  .tools{gap:8px;margin-bottom:16px}
  .tools input[type=search]{flex:1 1 100%;max-width:none;min-width:0;padding:12px 16px;font-size:15px}
  .btn{padding:9px 13px;font-size:12.5px;min-height:42px}
  select.voice-sel{flex:1 1 100%;max-width:none;min-height:42px}
  .cnt{flex:1 1 100%}

  /* ---- accordions ---- */
  .acc{border-radius:16px;margin-bottom:10px}
  .acc-head{padding:14px 16px;gap:10px}
  .acc-note{padding:0 16px 12px;font-size:12.5px}
  .acc-body{padding:0 16px 14px}
  .empty{padding:26px 18px}

  /* ---- tables become stacked lists (no sideways scrolling) ---- */
  .acc-body,.bk-tbl{overflow-x:visible}
  .acc-body table,.bk-tbl table{display:block;min-width:0;table-layout:auto;font-size:16px}
  .acc-body thead,.bk-tbl thead{display:none}
  .acc-body tbody,.bk-tbl tbody{display:block}
  .acc-body tr,.bk-tbl tr{display:grid;grid-template-columns:minmax(0,1fr) auto;
    gap:3px 10px;padding:13px 0;border-bottom:1px solid var(--rule)}
  .acc-body tr:last-child,.bk-tbl tr:last-child{border-bottom:0}
  .acc-body td,.bk-tbl td{display:block;grid-column:1/-1;border:0;padding:0}
  .acc-body td:empty,.bk-tbl td:empty{display:none}
  td.w{grid-column:1;grid-row:1;font-size:20px;line-height:1.35;white-space:normal;
    overflow-wrap:anywhere}
  td.w .say{opacity:.4}
  td.pos{grid-column:2;grid-row:1;justify-self:end;align-self:center;
    font-size:10.5px;font-weight:600;color:var(--ink-3);background:var(--paper);
    border:1px solid var(--rule);border-radius:999px;padding:3px 9px;white-space:nowrap}
  td.r{font-size:14.5px;white-space:normal}
  /* kana-only words repeat themselves once the columns stack — drop the echo */
  td.r.dup{display:none}
  td.m{font-size:15px;line-height:1.5;word-break:normal}
  td.ta{font-size:14px}
  td.src{margin-top:5px}
  .hide-r td.r,.hide-m td.m{min-height:21px;padding:0 8px}
  /* the bank's fixed column proportions only make sense as a real table */
  .bk-tbl table{min-width:0}
  .bk-tbl td:nth-child(1),.bk-tbl td:nth-child(2),
  .bk-tbl td:nth-child(3),.bk-tbl td:nth-child(4){width:auto}
  .bk-grp{border-radius:16px;margin-bottom:10px;scroll-margin-top:12px}
  .bk-h{padding:13px 16px}
  .bk-tbl{padding:2px 16px 12px}
  .bk-index{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;
    margin:0 calc(var(--gutter) * -1) 16px;padding:0 var(--gutter)}
  .bk-index::-webkit-scrollbar{display:none}
  .bk-index a{flex:0 0 auto;width:36px;height:36px;font-size:14px}

  /* the 60-day plan row has three muted cells; without this they all land
     in the same grid slot and print on top of each other */
  .plan-tbl tr{grid-template-columns:minmax(0,1fr) auto;gap:4px 8px}
  .plan-tbl td.w{grid-column:1;grid-row:1}
  .plan-tbl td.pl-day{grid-column:2;grid-row:1;justify-self:end;align-self:center;
    font-size:10.5px;font-weight:700;color:var(--ai);background:var(--ai-soft);
    border-radius:999px;padding:3px 10px;white-space:nowrap}
  .plan-tbl td.m{grid-column:1/-1;grid-row:2}
  /* grid-column:auto is essential — the generic td rule spans 1/-1, which would
     stack both chips in the same cell */
  .plan-tbl td.pl-n{grid-column:auto;grid-row:3;justify-self:start;align-self:center;
    font-size:10.5px;font-weight:600;color:var(--ink-3);background:var(--paper);
    border:1px solid var(--rule);border-radius:999px;padding:3px 9px;white-space:nowrap}
  .plan-tbl td.pl-n::before{content:attr(data-lb) " "}

  /* keigo rows need their column names back once the header row is gone */
  .keigo-tbl tr{grid-template-columns:minmax(0,1fr)}
  .keigo-tbl td.pl{grid-row:auto;font-size:19px;white-space:normal}
  .keigo-tbl td.so::before,.keigo-tbl td.ke::before{display:inline-block;
    font-family:var(--sans);font-size:9.5px;font-weight:700;letter-spacing:.06em;
    color:var(--ink-3);background:var(--paper);border:1px solid var(--rule);
    border-radius:999px;padding:2px 7px;margin-right:7px;vertical-align:1px}
  .keigo-tbl td.so::before{content:"\5C0A\656C\8A9E"}
  .keigo-tbl td.ke::before{content:"\8B19\8B72\8A9E"}
  .keigo-tbl td.so,.keigo-tbl td.ke{font-family:var(--serif);font-weight:700;font-size:17px}
  .keigo-tbl td:nth-child(4){color:var(--ink-2);font-size:15px}
  .keigo-tbl td.nt{font-size:12.5px;color:var(--ink-3)}

  /* ---- kanji ---- */
  .kgrid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}
  .k{padding:12px 8px;border-radius:14px}
  .k .ch{font-size:36px}
  .k .rd,.k .st{display:none}
  .k .mn{font-size:11.5px;margin-top:7px}

  /* ---- kanji detail becomes a bottom sheet ---- */
  .kp{top:auto;left:0;right:0;bottom:0;width:100%;max-width:100%;height:86vh;
    border-left:0;border-top:1px solid var(--rule);
    border-radius:22px 22px 0 0;overscroll-behavior:contain;
    transform:translateY(102%);padding:16px 18px calc(30px + env(safe-area-inset-bottom))}
  .kp.open{transform:translateY(0)}
  .kp::before{content:"";display:block;width:42px;height:4px;border-radius:2px;
    background:var(--rule-2);margin:0 auto 14px}
  .kp-x{top:12px;right:14px}
  .kp-ch{font-size:64px;margin-bottom:14px}
  .kp-stroke img,.kp-fb{width:156px;height:156px}

  /* ---- quiz ---- */
  .qz-card{padding:24px 15px;border-radius:20px}
  .qz-ch{font-size:46px}
  .qz-ch.sm{font-size:24px}
  .qz-opt{padding:14px 15px;min-height:52px;display:flex;align-items:center}
  .qz-opts-row .btn{flex:1 1 100%;min-height:48px;font-size:14px}
  .qz-score{font-size:44px}

  /* ---- reading & scenarios ---- */
  .passage,.sit-jp{padding:16px;font-size:16px;line-height:1.95;border-radius:14px}
  .rd-opt{padding:13px 14px;min-height:50px;align-items:center}
  .rd-stats span{font-size:12px;padding:7px 13px}

  /* ---- dashboard ---- */
  .hero{padding:42px 0 62px}
  .hero p{font-size:14px;margin-top:14px}
  .hero .stats{gap:7px;margin-top:20px}
  .hero .stats span{font-size:11.5px;padding:6px 12px}
  .hero .theme-btn{top:14px;right:16px}
  .grid-lv{grid-template-columns:1fr;gap:12px;margin-top:-30px}
  .lvcard{padding:18px;gap:12px;border-radius:20px}
  .lvcard .bdg{width:50px;height:50px;font-size:18px;border-radius:14px}
  .lvcard h3{font-size:19px}
  .lvcard .desc{font-size:13.5px;line-height:1.6}
  .dash-sec{margin-top:40px}
  .dash-sec h2{font-size:21px}
  .howto{grid-template-columns:1fr;gap:10px}
  .howto div{padding:16px;border-radius:14px}
  .foot{padding:34px 20px 28px;margin-top:40px}
}

@media (max-width:520px){
  .appnav button::after{font-size:9px}
  .acc-head .num{display:none}
  .acc-head .en{font-size:13.5px}
  .acc-head .jp{font-size:15px}
  .qz-opts{grid-template-columns:1fr}
  .seg{width:100%;justify-content:center}
  .hide-ta td.ta{display:none}
  td.w{font-size:19px}
  .kgrid{grid-template-columns:repeat(auto-fill,minmax(92px,1fr))}
  .k .ch{font-size:33px}
  .kp{padding-left:16px;padding-right:16px}
}

/* Very narrow phones: six tabs still have to fit. */
@media (max-width:380px){
  .appnav button::before{font-size:17px}
  .appnav button::after{font-size:8.5px}
  :root{--gutter:12px}
  .acc-head,.acc-body,.acc-note,.bk-h,.bk-tbl{padding-left:13px;padding-right:13px}
}

/* Landscape phones: a full-height title bar plus tab bar leaves too little page. */
@media (max-width:768px) and (max-height:460px) and (orientation:landscape){
  :root{--navh:46px}
  .appnav button{height:var(--navh);flex-direction:row;gap:7px}
  .appnav button::before{font-size:15px}
  .appnav button::after{font-size:10px}
}

/* ---------- quiz setup & flashcards on a phone ---------- */
@media (max-width:768px){
  .qz-setup{max-width:none}
  .qz-field{margin-bottom:17px}
  .chip{padding:10px 13px;font-size:12.5px;min-height:42px}
  .qz-count .seg{flex:1 1 100%;width:100%;justify-content:center}
  .qz-count input[type=number]{flex:1 1 100%;width:100%}
  .qz-start{width:100%;min-height:48px}
  #fcDeck,#fcSide,#fcMode{flex:1 1 100%;width:100%;justify-content:center}
  #fcGroup{flex:1 1 100%;width:100%;min-width:0;max-width:100%;min-height:42px;
    text-overflow:ellipsis}
  #fcShuffle{flex:1 1 100%}
  .fc-host{max-width:none}
  .fc-in{min-height:236px}
  .fc-face{padding:34px 18px 32px;border-radius:20px}
  .fc-jp{font-size:34px}
  .fc-jp.big{font-size:74px}
  .fc-en{font-size:19px}
  .fc-rd{font-size:17px}
  .fc-bar .btn{flex:1 1 0;min-height:48px}
  .fc-bar .btn[data-act="prev"],.fc-bar .btn[data-act="next"]{flex:0 0 58px}
}

/* A flipping card is meaningless if the device refuses animation. */
@media (prefers-reduced-motion:reduce){
  .fc-in{transition:none}
}