/* =========================================================
   Nihongo Tango Master — style.css
   1. ベース（リセット）  2. 色・文字のトークン  3. 各パーツ
   ========================================================= */

/* ---------- 1. ベース ---------- */
:root{color-scheme:light;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}

/* ---------- 2. トークン（ここを変えると全体の色が変わる） ---------- */
/* Layout: 原稿用紙のマス目をモチーフにした単語カードが主役。上に習得度メーター、PCでは右に広告カラム */
:root{
  --bg:#FBF1E7; --surface:#FFFFFF; --surface-2:#F5EADF; --ink:#10162F; --muted:#4D5270; --line:#E4D7CA;
  --accent:#2B47C8; --accent-ink:#FFFFFF; --accent-soft:#D8EDFB;
  --stamp:#C9442C; --gold:#D39A0E;
  --good:#1F7546; --good-soft:#DDF1E4; --bad:#B3261E; --bad-soft:#FBE3E0;
  --grid:rgba(16,22,47,.06); --ad:#F4E8DC; --ad-ink:#8A7D72;
  --fire-1:#FFC53D; --fire-2:#FF8B2B; --fire-3:#EC4A2C; --fire-core:#FFF5CC; --fire-soft:#FFE6CF; --fire-text:#E05519; --on-fire:#FFFFFF; --scrim:rgba(16,19,29,.55);
  /* 輪郭線と、ずらした「ベタ塗りの影」 */
  --edge:#10162F; --hover-edge:#10162F; --rule:1.5px dotted #10162F;
  --card-shadow:-6px 6px 0 #10162F; --card-shadow-hover:-9px 9px 0 #10162F;
  --btn-shadow:-5px 5px 0 #10162F; --btn-shadow-hover:-8px 8px 0 #10162F;
  --f-display:"Zen Maru Gothic","Hiragino Maru Gothic ProN","Yu Gothic",sans-serif;
  --f-body:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic","Meiryo",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  --r:10px;
  --mark-bg:#111216; --mark-ink:#FFFFFF;   /* ロゴの「単」マーク（両テーマ共通） */
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#10131D; --surface:#191E2C; --surface-2:#222839; --ink:#E7EAF3; --muted:#9AA3BE; --line:#2D3448;
    --accent:#8EA7FF; --accent-ink:#0E1430; --accent-soft:#232C4B;
    --stamp:#FF7B5E; --gold:#F1BE46;
    --good:#5DCB8C; --good-soft:#173527; --bad:#FF6F63; --bad-soft:#3D1B1A;
    --grid:rgba(142,167,255,.08); --ad:#1C2232; --ad-ink:#6F7894;
    --fire-1:#FFC94D; --fire-2:#FF9640; --fire-3:#F2593A; --fire-core:#FFF3C4; --fire-soft:#3B2415; --fire-text:#FF9B55; --on-fire:#FFFFFF; --scrim:rgba(0,0,0,.62);
    --edge:#2D3448; --hover-edge:#8EA7FF; --rule:1px solid #2D3448;
    --card-shadow:none; --card-shadow-hover:none;
    --btn-shadow:-5px 5px 0 #34478C; --btn-shadow-hover:-8px 8px 0 #34478C;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#10131D; --surface:#191E2C; --surface-2:#222839; --ink:#E7EAF3; --muted:#9AA3BE; --line:#2D3448;
  --accent:#8EA7FF; --accent-ink:#0E1430; --accent-soft:#232C4B;
  --stamp:#FF7B5E; --gold:#F1BE46;
  --good:#5DCB8C; --good-soft:#173527; --bad:#FF6F63; --bad-soft:#3D1B1A;
  --grid:rgba(142,167,255,.08); --ad:#1C2232; --ad-ink:#6F7894;
    --fire-1:#FFC94D; --fire-2:#FF9640; --fire-3:#F2593A; --fire-core:#FFF3C4; --fire-soft:#3B2415; --fire-text:#FF9B55; --on-fire:#FFFFFF; --scrim:rgba(0,0,0,.62);
    --edge:#2D3448; --hover-edge:#8EA7FF; --rule:1px solid #2D3448;
    --card-shadow:none; --card-shadow-hover:none;
    --btn-shadow:-5px 5px 0 #34478C; --btn-shadow-hover:-8px 8px 0 #34478C;
  color-scheme:dark;
}

*{box-sizing:border-box}
html{font-size:16px}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:1rem;line-height:1.7;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--surface)}
a{color:var(--accent)}
button,input{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:8px}
h1,h2,h3{font-family:var(--f-display);text-wrap:balance;line-height:1.3;margin:0}
.gutter{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

/* ---------- Header ---------- */
.topbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--surface);border-bottom:1px solid var(--edge)}
.topbar-in{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;align-items:center;gap:16px;padding-block:10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-mark{width:38px;height:38px;flex:none;display:block;border-radius:8px;background:var(--mark-bg);color:var(--mark-ink);border:1px solid var(--edge);overflow:hidden}
.brand-mark svg{display:block;width:100%;height:100%}
.brand-name{font-family:var(--f-display);font-weight:700;font-size:1.05rem;line-height:1.15}
.brand-name small{display:block;font-family:var(--f-body);font-weight:500;font-size:.7rem;color:var(--muted);letter-spacing:.06em}
.meter{justify-self:end;width:min(320px,100%);display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px}
.meter-label{font-size:.75rem;color:var(--muted);letter-spacing:.06em;white-space:nowrap}
.meter-bar{height:10px;border-radius:99px;background:var(--surface-2);overflow:hidden}
.meter-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--gold));border-radius:99px;transition:width .5s ease}
.meter-pct{font-family:var(--f-mono);font-size:.9rem;font-variant-numeric:tabular-nums;min-width:3.2em;text-align:right}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:8px;border:1px solid var(--edge);background:var(--surface);cursor:pointer}
.icon-btn:hover{background:var(--surface-2)}
.icon-btn svg{width:20px;height:20px}
.tabs{max-width:1180px;margin:0 auto;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;padding-block:0 8px}
.tabs::-webkit-scrollbar{display:none}
.tabs a{flex:none;text-decoration:none;color:var(--muted);font-weight:500;font-size:.9rem;padding:6px 14px;border-radius:99px;white-space:nowrap}
.tabs a:hover{background:var(--surface-2);color:var(--ink)}
.tabs a[aria-current="page"]{background:var(--accent-soft);color:var(--accent);font-weight:700}

/* ---------- Ads ---------- */
.ad{display:grid;place-items:center;align-content:center;gap:2px;background:var(--ad);color:var(--ad-ink);border:1px dashed var(--line);border-radius:10px;font-size:.75rem;letter-spacing:.1em;text-align:center}
.ad b{font-weight:500}
.ad small{font-family:var(--f-mono);font-size:.68rem;letter-spacing:0}
.ad-banner{max-width:728px;height:90px;margin:16px auto 0}
.ad-rect{width:300px;max-width:100%;height:250px;margin:8px auto 0}
.ad-tall{width:300px;height:600px}
.sz-m{display:none}

/* ---------- Shell ---------- */
.shell{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr);gap:28px;padding-block:24px 40px}
.side{display:none}
main{min-width:0}
.view{display:grid;gap:24px}
.view-head{display:grid;gap:4px}
.view-head h2{font-size:clamp(1.5rem,1.2rem + 1.2vw,2rem)}
.view-head p{margin:0;color:var(--muted);max-width:62ch}
.eyebrow{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:700}
.panel{background:var(--surface);border:1px solid var(--edge);border-radius:var(--r);padding:20px;box-shadow:var(--card-shadow)}

@media (min-width:1100px){
  .shell{grid-template-columns:minmax(0,1fr) 300px}
  .side{display:block}
  .side .ad{position:sticky;top:calc(env(safe-area-inset-top,0px) + 130px)}
  .in-content-ad{display:none}
}

/* ---------- Buttons / chips ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 18px;border-radius:8px;border:1px solid var(--edge);background:var(--surface);font-weight:700;cursor:pointer;text-decoration:none;color:var(--ink)}
.btn:hover{background:var(--surface-2)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{background:var(--accent);filter:brightness(1.08)}
.btn[aria-disabled="true"],.btn:disabled{opacity:.45;cursor:not-allowed}
.btn svg{width:18px;height:18px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:6px 14px;border-radius:99px;border:1px solid var(--edge);background:var(--surface);font-size:.85rem;cursor:pointer}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--bg);font-weight:700}
.say{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:4px 12px 4px 8px;font-size:.8rem;cursor:pointer;color:var(--accent);font-weight:700}
.say:hover{background:var(--accent-soft)}
.say svg{width:18px;height:18px}
.say.round{padding:0;width:38px;height:38px;justify-content:center;flex:none}
.tag{display:inline-block;font-size:.7rem;letter-spacing:.06em;padding:2px 10px;border-radius:99px;background:var(--surface-2);color:var(--muted);font-weight:700;white-space:nowrap}
.tag.custom{background:var(--accent-soft);color:var(--accent)}
.dots{display:inline-flex;gap:4px}
.dots i{width:8px;height:8px;border-radius:50%;background:var(--line)}
.dots i.on{background:var(--gold)}

/* ---------- Home ---------- */
.hero{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:20px;align-items:stretch}
.hero-copy{padding:28px;background:var(--surface);border:1px solid var(--edge);border-radius:var(--r);box-shadow:var(--card-shadow);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px}
.hero-copy h1{font-size:clamp(1.7rem,1.2rem + 2vw,2.6rem);font-weight:900;margin-top:6px}
.hero-copy h1 em{font-style:normal;color:var(--accent)}
.hero-copy p{margin:12px 0 0;color:var(--muted);max-width:44ch}
.hero-copy .btn{margin-top:22px}
/* ベタ影のボタン：ホバーで浮き上がり、押すと影の位置まで沈む */
.btn-hero{min-height:54px;padding:12px 26px;font-size:1.05rem;border:2px solid var(--edge);border-radius:8px;box-shadow:var(--btn-shadow);transition:transform .12s ease,box-shadow .12s ease}
.btn-hero svg{width:20px;height:20px;transition:transform .12s ease}
.btn-hero:hover{filter:none;transform:translate(3px,-3px);box-shadow:var(--btn-shadow-hover)}
.btn-hero:hover svg{transform:translateX(3px)}
.btn-hero:active{transform:translate(-5px,5px);box-shadow:0 0 0 var(--edge)}
.stat-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0;padding-top:14px;border-top:var(--rule)}
.stat-list div{display:grid;gap:0}
.stat-list dt{font-size:.72rem;color:var(--muted);letter-spacing:.08em}
.stat-list dd{margin:2px 0 0;font-weight:700;font-variant-numeric:tabular-nums;font-size:.98rem;line-height:1.35;overflow-wrap:anywhere}
.modes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.mode{display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;align-items:start;padding:20px;background:var(--surface);border:1px solid var(--edge);border-radius:var(--r);text-decoration:none;color:var(--ink);box-shadow:var(--card-shadow);transition:border-color .15s,transform .15s,box-shadow .15s}
.mode:hover{border-color:var(--hover-edge);transform:translate(3px,-3px);box-shadow:var(--card-shadow-hover)}
.mode-glyph{width:54px;height:54px;display:grid;place-items:center;border-radius:12px;background:var(--accent-soft);color:var(--accent);font-family:var(--f-display);font-weight:900;font-size:1.6rem}
.mode h3{font-size:1.15rem}
.mode p{margin:4px 0 0;font-size:.88rem;color:var(--muted)}
.mode .en{font-size:.72rem;font-weight:700;color:var(--muted);letter-spacing:.06em}
.howto h3{font-size:1.15rem;margin-bottom:12px}
.howto ol{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:s}
.howto li{counter-increment:s;display:grid;align-content:start;gap:4px;font-size:.88rem;color:var(--muted)}
.howto li::before{content:counter(s);width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:var(--bg);font-family:var(--f-mono);font-size:.8rem}
.howto li b{color:var(--ink);font-size:.95rem}

/* ---------- Study ---------- */
.fc{background:var(--surface);border:1px solid var(--edge);border-radius:var(--r);box-shadow:var(--card-shadow);padding:20px;min-height:340px;display:grid;grid-template-rows:auto 1fr auto;gap:16px;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:36px 36px;background-position:-1px -1px}
.fc-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.fc-center{display:grid;place-items:center;align-content:center;gap:10px;text-align:center}
.fc-word{font-family:var(--f-display);font-weight:900;font-size:clamp(3rem,2rem + 6vw,5.5rem);line-height:1.1;word-break:keep-all;overflow-wrap:anywhere}
.fc-pron{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px}
.fc-read{font-size:1.3rem;font-weight:700}
.fc-roma{font-family:var(--f-mono);color:var(--muted);font-size:1rem}
.fc-mean{border-top:var(--rule);padding-top:14px;text-align:center;display:grid;gap:4px}
.fc-mean .en{font-family:var(--f-mono);font-size:1.15rem}
.fc-mean .ja{color:var(--muted);font-size:.95rem}
.fc-ctrl{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px}
.fc-ctrl .grp{display:flex;gap:8px;flex-wrap:wrap}
.count{font-family:var(--f-mono);font-variant-numeric:tabular-nums;color:var(--muted);font-size:.9rem}
.hint{font-size:.78rem;color:var(--muted);margin:0}

/* ---------- Pronounce ---------- */
.pform{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr) minmax(0,1fr);gap:12px;align-items:end}
.field{display:grid;gap:4px;min-width:0}
.field label{font-size:.78rem;font-weight:700;color:var(--muted)}
.field input{width:100%;min-height:46px;padding:8px 12px;border-radius:8px;border:1px solid var(--edge);background:var(--bg)}
.field input::placeholder,.search::placeholder{color:var(--muted);opacity:.55;font-weight:400}
.field input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.field.big input{font-family:var(--f-display);font-size:1.25rem;font-weight:700}
.yg-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:16px}
.yg-link{font-size:1rem}
.yg-preview{flex:1 1 280px;min-width:0;font-family:var(--f-mono);font-size:.78rem;color:var(--muted);overflow-wrap:anywhere}
.note{font-size:.82rem;color:var(--muted);background:var(--surface-2);border-radius:10px;padding:10px 14px;margin:16px 0 0}
.hist{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.hist a{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:99px;background:var(--surface-2);text-decoration:none;color:var(--ink);font-family:var(--f-display);font-weight:700}
.hist a:hover{background:var(--accent-soft);color:var(--accent)}
.hist a svg{width:12px;height:12px;opacity:.6}
.sub-h{font-size:1rem;margin:0}

/* ---------- Test ---------- */
.formats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;border:0;padding:0;margin:0}
.formats legend{font-weight:700;margin-bottom:10px;padding:0}
.fmt{position:relative}
.fmt input{position:absolute;opacity:0;pointer-events:none}
.fmt label{display:grid;gap:2px;height:100%;padding:14px 16px;border:1px solid var(--edge);border-radius:8px;background:var(--surface);cursor:pointer}
.fmt label b{font-family:var(--f-display);font-size:1rem}
.fmt label span{font-size:.78rem;color:var(--muted)}
.fmt input:checked + label{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent)}
.fmt input:focus-visible + label{outline:3px solid var(--accent);outline-offset:2px}
.test-start{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:18px}
.qhead{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.qbar{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden;margin-top:10px}
.qbar i{display:block;height:100%;background:var(--accent);transition:width .3s}
.qprompt{text-align:center;padding:28px 8px 20px;display:grid;gap:6px}
.qprompt .ask{font-size:.85rem;color:var(--muted)}
.qprompt .q{font-family:var(--f-display);font-weight:900;font-size:clamp(2.2rem,1.6rem + 4vw,3.8rem);line-height:1.15;overflow-wrap:anywhere}
.qprompt .q.latin{font-family:var(--f-mono);font-weight:500;font-size:clamp(1.5rem,1.2rem + 2vw,2.2rem)}
.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.choice{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:center;text-align:left;min-height:60px;padding:12px 16px;border-radius:8px;border:1px solid var(--edge);background:var(--surface);cursor:pointer;font-size:1rem;line-height:1.5}
.choice:hover:not(:disabled){border-color:var(--accent)}
.choice kbd{font-family:var(--f-mono);font-size:.75rem;width:24px;height:24px;display:grid;place-items:center;border-radius:6px;background:var(--surface-2);color:var(--muted)}
.choice.jp{font-family:var(--f-display);font-weight:700;font-size:1.15rem}
.choice.right{border-color:var(--good);background:var(--good-soft)}
.choice.right kbd{background:var(--good);color:var(--surface)}
.choice.wrong{border-color:var(--bad);background:var(--bad-soft)}
.choice.wrong kbd{background:var(--bad);color:var(--surface)}
.choice:disabled{cursor:default}
.feedback{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;padding:12px 16px;border-radius:12px;background:var(--surface-2)}
.feedback .verdict{font-weight:700}
.feedback .verdict.ok{color:var(--good)}
.feedback .verdict.ng{color:var(--bad)}
.feedback .detail{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:.9rem}
.result{text-align:center;display:grid;gap:8px;justify-items:center}
.result .score{font-family:var(--f-mono);font-size:3.4rem;font-variant-numeric:tabular-nums;line-height:1}
.result .score small{font-size:1.2rem;color:var(--muted)}
.missed{width:100%;text-align:left;margin-top:12px}
.missed ul{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:6px}
.missed li{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 12px;border-radius:10px;background:var(--surface-2)}
.missed li b{font-family:var(--f-display);font-size:1.05rem}
.missed li span{color:var(--muted);font-size:.88rem}

/* ---------- Word list ---------- */
.wtools{display:grid;gap:12px}
.search{width:100%;min-height:44px;padding:8px 14px;border-radius:8px;border:1px solid var(--edge);background:var(--surface)}
.search:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.wlist{display:grid;gap:8px}
.wrow{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.4fr) auto auto;gap:16px;align-items:center;padding:12px 16px;background:var(--surface);border:1px solid var(--edge);border-radius:8px}
.wmain{display:grid;min-width:0}
.ww{font-family:var(--f-display);font-weight:900;font-size:1.35rem;line-height:1.3;overflow-wrap:anywhere}
.wr{font-size:.85rem;color:var(--muted)}
.wr .ro{font-family:var(--f-mono);font-size:.8rem}
.wen{min-width:0;display:grid}
.wen b{font-family:var(--f-mono);font-weight:500;font-size:.92rem}
.wen small{color:var(--muted);font-size:.8rem}
.wmeta{display:grid;justify-items:end;gap:6px}
.wact{display:flex;gap:6px}
.del{border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:4px 12px;font-size:.75rem;cursor:pointer;color:var(--muted)}
.del.arm{border-color:var(--bad);color:var(--bad);background:var(--bad-soft)}
.empty{padding:28px;text-align:center;color:var(--muted);background:var(--surface);border:1px dashed var(--line);border-radius:12px}

/* ---------- Auto-fill status / Add page ---------- */
.status{margin:14px 0 0;font-size:.88rem;padding:10px 14px;border-radius:10px;background:var(--surface-2);color:var(--ink)}
.status.ok{background:var(--good-soft);color:var(--good)}
.status.warn{background:var(--bad-soft);color:var(--bad)}
.status.busy::before{content:"";display:inline-block;width:12px;height:12px;margin-right:8px;vertical-align:-1px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.add-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:16px;align-items:start}
.aform{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.span2{grid-column:1 / -1}
.field select{width:100%;min-height:46px;padding:8px 12px;border-radius:8px;border:1px solid var(--edge);background:var(--bg)}
.field select:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.apreview{display:grid;gap:10px;position:sticky;top:calc(env(safe-area-inset-top,0px) + 130px);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:30px 30px}
.pv{display:grid;justify-items:center;gap:8px;text-align:center;padding:12px 0}
.pv-word{font-family:var(--f-display);font-weight:900;font-size:clamp(2.2rem,1.6rem + 3vw,3.2rem);line-height:1.15;overflow-wrap:anywhere}
.pv-en{font-family:var(--f-mono);font-size:1rem}
.pv-ja{color:var(--muted);font-size:.88rem}
.mini{border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:4px 12px;font-size:.75rem;cursor:pointer;color:var(--accent);font-weight:700}
.mini:disabled{opacity:.6;cursor:progress}
.mode.wide{grid-column:1 / -1}

/* ---------- Streak: flame ---------- */
.flame{display:block;overflow:visible}
.flame .f-out{fill:url(#gFlameOuter)}
.flame .f-in{fill:url(#gFlameInner)}
.flame .spark{fill:var(--fire-1)}
.flame.off .f-out{fill:var(--line)}
.flame.off .f-in{fill:var(--surface-2)}
.flame.off .spark{display:none}
.flame .f-out,.flame .f-in,.flame .spark{transform-box:fill-box;transform-origin:50% 100%}
.flame.on .f-out{animation:flick 2.6s ease-in-out infinite}
.flame.on .f-in{animation:flick2 1.9s ease-in-out infinite}
.flame.on .spark{animation:rise 2.4s ease-out infinite}
.flame.on .spark.s2{animation-delay:1.1s}
.flame.ignite,.streak-chip.ignite .flame{transform-origin:50% 100%;animation:ignite .9s cubic-bezier(.2,1.4,.4,1) both}
@keyframes flick{0%,100%{transform:scale(1,1) skewX(0)}35%{transform:scale(1.02,.97) skewX(1.2deg)}70%{transform:scale(.99,1.03) skewX(-1deg)}}
@keyframes flick2{0%,100%{transform:scale(1,1)}50%{transform:scale(1.07,.9)}}
@keyframes rise{0%{transform:translateY(8px);opacity:0}30%{opacity:1}100%{transform:translateY(-16px);opacity:0}}
@keyframes ignite{0%{transform:scale(.3);opacity:.2}60%{transform:scale(1.2);opacity:1}100%{transform:scale(1)}}

/* header chip */
.streak-chip{display:inline-flex;align-items:center;gap:4px;text-decoration:none;color:var(--fire-text);font-family:var(--f-display);font-weight:900;font-size:1.1rem;padding:4px 10px 4px 6px;border-radius:99px;font-variant-numeric:tabular-nums}
.streak-chip:hover{background:var(--surface-2)}
.streak-chip .flame{width:22px;height:27px}
.streak-chip.is-off{color:var(--muted)}

/* home streak card */
.streak-card{display:grid;align-content:start;gap:0}
.sc-top{display:flex;justify-content:space-between;align-items:center;gap:12px}
.sc-num b{display:block;font-family:var(--f-display);font-weight:900;font-size:clamp(3.4rem,2.6rem + 3vw,4.6rem);line-height:1;color:var(--fire-text);font-variant-numeric:tabular-nums}
.sc-num span{font-family:var(--f-display);font-weight:900;font-size:1.35rem;color:var(--fire-text)}
.streak-card.is-off .sc-num b,.streak-card.is-off .sc-num span{color:var(--muted)}
.sc-flame{flex:none;width:92px;height:112px;position:relative}
.sc-flame::before{content:"";position:absolute;inset:-14px;border-radius:50%;background:radial-gradient(circle,var(--fire-soft) 0,transparent 68%)}
.streak-card.is-off .sc-flame::before{display:none}
.sc-flame .flame{position:relative;width:100%;height:100%}
.sc-msg{margin:14px 0;padding:12px 14px;border-radius:8px;background:var(--accent-soft);font-size:.92rem;color:var(--muted)}
.sc-msg strong{color:var(--fire-text)}

/* goal + calendar */
.streak-sec{display:grid;gap:16px;scroll-margin-top:calc(env(safe-area-inset-top,0px) + 130px)}
.sec-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.sec-head h3{font-size:1.15rem}
.linkish{background:none;border:0;color:var(--accent);font-weight:700;cursor:pointer;padding:4px 0;font-size:.85rem;text-decoration:underline;text-underline-offset:3px}
.goal .hint{margin-top:2px}
.goal-track{display:flex;align-items:center;margin:20px 0 12px}
.gnode{flex:none;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);border:3px solid var(--line);font-family:var(--f-mono);font-size:.88rem;color:var(--muted);font-variant-numeric:tabular-nums;position:relative;z-index:1}
.gnode b{font-weight:500}
.gnode.done{background:linear-gradient(180deg,var(--fire-3),var(--fire-2));border-color:var(--fire-1);color:var(--on-fire)}
.gnode.next:not(.done){border-style:dashed;border-color:var(--fire-2);color:var(--fire-text);background:var(--surface)}
.gseg{flex:1 1 0;min-width:12px;height:12px;margin:0 -3px;background:var(--surface-2);border-radius:99px;overflow:hidden}
.gseg i{display:block;height:100%;background:linear-gradient(90deg,var(--fire-2),var(--fire-1));transition:width .6s ease}
.goal-hint{margin:0;font-size:.92rem}
.goal-hint strong{color:var(--fire-text)}
.cal-nav{display:flex;gap:6px}
.cal-nav .icon-btn{font-size:1.2rem;line-height:1}
.cal-nav .icon-btn:disabled{opacity:.35;cursor:default}
.cal-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));row-gap:8px;margin-top:14px}
.cal-dow{text-align:center;font-size:.74rem;font-weight:700;color:var(--muted);padding-bottom:4px}
.cd{position:relative;height:44px;display:grid;place-items:center;font-family:var(--f-mono);font-variant-numeric:tabular-nums;color:var(--muted)}
.cd > span{position:relative;z-index:1}
.cd.on{color:var(--on-fire);font-weight:700}
.cd.on::before{content:"";position:absolute;top:3px;bottom:3px;left:4px;right:4px;background:linear-gradient(180deg,var(--fire-3),var(--fire-2));border-radius:99px}
.cd.on.jl::before{left:0;border-top-left-radius:0;border-bottom-left-radius:0}
.cd.on.jr::before{right:0;border-top-right-radius:0;border-bottom-right-radius:0}
.cd.on:not(.jl):not(.jr)::before{left:50%;right:auto;width:38px;transform:translateX(-50%)}
.cd.today:not(.on)::before{content:"";position:absolute;left:50%;top:50%;width:38px;height:38px;transform:translate(-50%,-50%);border-radius:50%;border:2px dashed var(--fire-2)}
.cd.today:not(.on){color:var(--fire-text);font-weight:700}
.cd.today.on::after{content:"";position:absolute;left:50%;top:50%;width:5px;height:5px;border-radius:50%;background:var(--on-fire);transform:translate(-50%,11px);z-index:1}
.cd.future{opacity:.4}
.cd .ms{position:absolute;top:-2px;right:6%;width:15px;height:15px;color:var(--gold);z-index:2}
.cal-foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-top:10px}
.cal-key{display:flex;gap:14px;font-size:.78rem;color:var(--muted)}
.cal-key i{display:inline-block;width:12px;height:12px;border-radius:50%;margin-right:5px;vertical-align:-1px}
.cal-key .k-on{background:linear-gradient(180deg,var(--fire-3),var(--fire-2))}
.cal-key .k-today{border:2px dashed var(--fire-2)}

/* celebration */
.celebrate{position:fixed;inset:0;z-index:50;display:grid;place-items:center;background:var(--scrim);padding:max(16px,env(safe-area-inset-top,0px)) max(16px,env(safe-area-inset-right,0px)) max(16px,env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px))}
.celebrate canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:2}
.cel-card{position:relative;width:min(380px,100%);background:var(--surface);border-radius:20px;padding:28px 24px;text-align:center;display:grid;justify-items:center;gap:4px;animation:pop .5s cubic-bezier(.2,1.4,.4,1) both}
.cel-flame{width:104px;height:126px;margin-bottom:6px}
.cel-flame .flame{width:100%;height:100%}
.cel-num{font-family:var(--f-display);font-weight:900;font-size:4.2rem;line-height:1;color:var(--fire-text);font-variant-numeric:tabular-nums}
.cel-sub{font-family:var(--f-display);font-weight:900;font-size:1.35rem;color:var(--fire-text)}
.cel-card p{margin:8px 0 14px;color:var(--muted)}
@keyframes pop{0%{transform:scale(.7);opacity:0}100%{transform:scale(1);opacity:1}}

/* ---------- Footer / toast ---------- */
footer{border-top:1px solid var(--edge);background:var(--surface)}
.foot-in{max-width:1180px;margin:0 auto;padding-block:20px calc(20px + env(safe-area-inset-bottom,0px));display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:.8rem;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:12px;font-size:.88rem;font-weight:500;z-index:40;transition:.25s;max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero{grid-template-columns:minmax(0,1fr)}
  .howto ol{grid-template-columns:repeat(2,minmax(0,1fr))}
  .formats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .pform{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .pform .field.big{grid-column:1 / -1}
  .wrow{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr) auto}
  .wmeta{display:none}
  .add-grid{grid-template-columns:minmax(0,1fr)}
  .apreview{position:static}
}
@media (max-width:640px){
  .topbar-in{grid-template-columns:auto minmax(0,1fr) auto auto;gap:8px}
  .brand-name small{display:none}
  .meter{grid-template-columns:minmax(0,1fr) auto}
  .meter-label{display:none}
  .ad-banner{max-width:320px;height:100px}
  .sz-d{display:none}.sz-m{display:inline}
  .modes{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .mode{grid-template-columns:minmax(0,1fr);gap:10px;padding:16px}
  .mode p{display:none}
  .mode-glyph{width:44px;height:44px;font-size:1.3rem}
  .mode.wide{grid-template-columns:auto minmax(0,1fr);align-items:center}
  .tabs{-webkit-mask-image:linear-gradient(90deg,#000 82%,transparent);mask-image:linear-gradient(90deg,#000 82%,transparent);padding-right:40px}
  .choices{grid-template-columns:minmax(0,1fr)}
  .formats{grid-template-columns:minmax(0,1fr)}
  .wrow{grid-template-columns:minmax(0,1fr) auto;gap:8px 12px}
  .wen{grid-column:1 / -1;grid-row:2}
  .shell{padding-block:16px 32px}
  .panel{padding:16px}
  .fc{min-height:300px;padding:16px}
}
@media (max-width:420px){
  .brand-name{font-size:.9rem}
  .howto ol{grid-template-columns:minmax(0,1fr)}
  .pform{grid-template-columns:minmax(0,1fr)}
  .aform{grid-template-columns:minmax(0,1fr)}
  .brand-name{display:none}
  .gnode{width:42px;height:42px;font-size:.78rem}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}