/* =========================================================
   算数マスター v2 — デザインシステム
   ========================================================= */
:root{
  --ink:#2b3245; --ink2:#4a5568; --sub:#6b7a90; --faint:#93a3b8;
  --paper:#fffdf7; --card:#ffffff; --line:#e6ecf3;
  --a:#ff8a3d; --b:#38bdf8; --c:#5cc85c; --d:#ff6f91; --e:#fbbf24; --f:#a78bfa;
  --a-l:#ffe6d1; --b-l:#ddf2ff; --c-l:#dcf5d6; --d-l:#ffdde6; --e-l:#fff2cc; --f-l:#eae3ff;
  --ok:#16a34a; --ng:#ef4444;
  --r:18px; --r-lg:26px;
  --sh:0 4px 0 rgba(43,50,69,.13), 0 10px 26px rgba(43,50,69,.10);
  --sh-sm:0 2px 0 rgba(43,50,69,.12), 0 5px 14px rgba(43,50,69,.08);
  --font:'Hiragino Maru Gothic ProN','ヒラギノ丸ゴ ProN W4','Zen Maru Gothic','Yu Gothic',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font); color:var(--ink); line-height:1.65;
  background:
    radial-gradient(1000px 460px at 12% -8%, #fff2d0 0%, transparent 60%),
    radial-gradient(900px 420px at 92% 4%, #ffe1ec 0%, transparent 62%),
    radial-gradient(1000px 520px at 50% 108%, #d9f0ff 0%, transparent 60%),
    #fbf7ef;
  min-height:100vh; -webkit-font-smoothing:antialiased;
  padding:16px 14px calc(96px + env(safe-area-inset-bottom));
  padding-top:max(14px, env(safe-area-inset-top));
}
.wrap{max-width:760px;margin:0 auto}
.wrap.wide{max-width:1000px}
button,input,select,textarea{font-family:inherit;font-size:inherit}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.35;letter-spacing:.01em}

/* ---------- ヘッダー ---------- */
.top{
  display:flex;align-items:center;gap:12px;
  background:var(--card);border-radius:var(--r-lg);padding:14px 18px;box-shadow:var(--sh);
  margin-bottom:14px;position:relative;
}
.top h1{font-size:1.28rem;flex:1;min-width:0}
.top .sub{font-size:.8rem;color:var(--sub);font-weight:600}
.back{
  display:inline-flex;align-items:center;gap:4px;background:var(--b-l);color:#0b6fa4;
  font-weight:800;font-size:.82rem;padding:8px 13px;border-radius:999px;flex:none;
  box-shadow:0 2px 0 rgba(11,111,164,.2);
}
.back:active{transform:translateY(1px)}

/* ---------- カード ---------- */
.card{
  background:var(--card);border-radius:var(--r-lg);padding:20px;
  box-shadow:var(--sh);margin-bottom:14px;
}
.card.tight{padding:14px}
.card h2{font-size:1.1rem;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.card h3{font-size:.98rem;margin:18px 0 8px;color:var(--ink2)}
.muted{color:var(--sub);font-size:.88rem}

/* ---------- ヒント帯 ---------- */
.note{
  border-radius:16px;padding:13px 15px;margin:10px 0;font-size:.94rem;
  background:var(--e-l);border-left:6px solid var(--e);
}
.note.b{background:var(--b-l);border-color:var(--b)}
.note.c{background:var(--c-l);border-color:var(--c)}
.note.d{background:var(--d-l);border-color:var(--d)}
.note.f{background:var(--f-l);border-color:var(--f)}
.note strong{font-weight:800}

/* ---------- ボタン ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;border-radius:16px;padding:14px 20px;font-weight:800;font-size:1rem;
  color:#fff;background:linear-gradient(180deg,#ffa45c,#ff7a2f);
  box-shadow:0 4px 0 #d9601c, 0 8px 18px rgba(217,96,28,.28);
  cursor:pointer;transition:transform .08s, box-shadow .08s;
}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 #d9601c}
.btn.blue{background:linear-gradient(180deg,#5fcdff,#22a7ea);box-shadow:0 4px 0 #1183bd,0 8px 18px rgba(17,131,189,.28)}
.btn.blue:active{box-shadow:0 1px 0 #1183bd}
.btn.green{background:linear-gradient(180deg,#79dd79,#3fbf4f);box-shadow:0 4px 0 #2c9439,0 8px 18px rgba(44,148,57,.28)}
.btn.green:active{box-shadow:0 1px 0 #2c9439}
.btn.ghost{background:#fff;color:var(--ink2);box-shadow:inset 0 0 0 2px var(--line),0 2px 0 rgba(0,0,0,.05)}
.btn.ghost:active{box-shadow:inset 0 0 0 2px var(--line)}
.btn.wide{width:100%}
.btn.sm{padding:9px 14px;font-size:.86rem;border-radius:12px}
.btn[disabled]{opacity:.45;pointer-events:none}

/* ---------- キャラクター ---------- */
.chara{display:block;overflow:visible;will-change:transform}
.chara .ch-eyes{transition:transform .16s ease-out;transform-box:fill-box;transform-origin:center}
@keyframes chIdle{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-5px) rotate(-1deg)}}
@keyframes chHop{0%,100%{transform:translateY(0) scaleY(1)}20%{transform:translateY(0) scaleY(.86) scaleX(1.1)}55%{transform:translateY(-26px) scaleY(1.08) scaleX(.94)}80%{transform:translateY(0) scaleY(.94) scaleX(1.05)}}
@keyframes chShake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px) rotate(-3deg)}75%{transform:translateX(5px) rotate(3deg)}}
@keyframes chPop{0%{transform:scale(1)}30%{transform:scale(.88) rotate(-4deg)}60%{transform:scale(1.09) rotate(3deg)}100%{transform:scale(1)}}
@keyframes chFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
@keyframes blink{0%,92%,100%{transform:scaleY(1)}95%{transform:scaleY(.08)}}
.ch-idle{animation:chIdle 2.8s ease-in-out infinite}
.ch-hop{animation:chHop .62s cubic-bezier(.3,1.6,.5,1)}
.ch-shake{animation:chShake .42s ease-in-out}
.ch-pop{animation:chPop .38s cubic-bezier(.3,1.7,.5,1)}
.ch-float{animation:chFloat 3.4s ease-in-out infinite}
.chara .ch-eyes{animation:blink 5.2s infinite}
@media (prefers-reduced-motion:reduce){.chara,.chara *{animation:none!important}}

.ch-row{display:flex;align-items:flex-end;gap:10px}
.ch-row.right{flex-direction:row}
.ch-fig{flex:none}
.ch-bubble{
  position:relative;background:#fff;border:3px solid var(--ink);border-radius:18px;
  padding:11px 15px;font-weight:700;font-size:.94rem;box-shadow:0 4px 0 rgba(43,50,69,.16);
  margin-bottom:22px;flex:1;
}
.ch-bubble::after{
  content:'';position:absolute;bottom:-13px;left:22px;width:18px;height:18px;
  background:#fff;border-left:3px solid var(--ink);border-bottom:3px solid var(--ink);
  transform:rotate(-45deg) skew(-6deg,-6deg);border-radius:0 0 0 5px;
}
.ch-row.right .ch-bubble::after{left:auto;right:22px}

/* ---------- 図 ---------- */
.fig{
  margin:14px 0;background:#fffdf7;border:2px solid var(--line);border-radius:18px;
  padding:8px 10px 6px;overflow-x:auto;
}
.fig-svg{display:block;width:100%;height:auto;font-family:var(--font)}
.fig-cap{text-align:center;font-size:.83rem;color:var(--sub);font-weight:700;padding:2px 0 6px}
.fig-err{padding:12px;color:var(--ng);font-size:.85rem;text-align:center}
.fig.tone-warn{background:#fff8ec;border-color:#f8dfae}

/* ---------- ステータスバー ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-bottom:14px}
.stat{
  background:var(--card);border-radius:18px;padding:12px 6px;text-align:center;box-shadow:var(--sh-sm);
}
.stat .ico{font-size:1.35rem;line-height:1}
.stat .n{font-size:1.4rem;font-weight:900;line-height:1.2}
.stat .l{font-size:.66rem;color:var(--sub);font-weight:700}
.stat.hot .n{color:var(--a)} .stat.coin .n{color:var(--e)} .stat.crown .n{color:var(--f)}

/* ---------- 学習マップ ---------- */
.islands{display:flex;flex-direction:column;gap:14px}
.island{
  background:var(--card);border-radius:var(--r-lg);box-shadow:var(--sh);overflow:hidden;
}
.island-head{
  display:flex;align-items:center;gap:12px;padding:14px 18px;color:#fff;
  background:linear-gradient(135deg,var(--b),#0ea5e9);
}
.island-head .emo{font-size:1.7rem}
.island-head h2{font-size:1.05rem;margin:0;color:#fff}
.island-head .p{font-size:.75rem;opacity:.92;font-weight:700}
.island.g1 .island-head{background:linear-gradient(135deg,#ffb36b,#ff8a3d)}
.island.g2 .island-head{background:linear-gradient(135deg,#7ddc86,#3fbf4f)}
.island.g3 .island-head{background:linear-gradient(135deg,#6fd0ff,#22a7ea)}
.island.g4 .island-head{background:linear-gradient(135deg,#c0a8ff,#8b6df0)}
.island.g5 .island-head{background:linear-gradient(135deg,#ff9ab5,#f6668f)}
.island.g6 .island-head{background:linear-gradient(135deg,#ffd166,#f0a500)}
.island.jk .island-head{background:linear-gradient(135deg,#3d4a6b,#1f2942)}
.island.hard .island-head{background:linear-gradient(135deg,#8b2f4a,#3d1224)}
.unit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;padding:14px}
.unit{
  display:block;background:#fff;border:2px solid var(--line);border-radius:16px;padding:11px 12px;
  box-shadow:0 2px 0 rgba(43,50,69,.07);position:relative;transition:transform .1s;
}
.unit:active{transform:translateY(2px)}
.unit .t{font-weight:800;font-size:.92rem;line-height:1.35;margin-bottom:6px}
.unit .m{font-size:.7rem;color:var(--sub);font-weight:700}
.unit .bar{height:7px;background:var(--line);border-radius:99px;overflow:hidden;margin-top:7px}
.unit .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--c),#7fe37f);border-radius:99px;transition:width .5s}
.unit.done{border-color:var(--c);background:linear-gradient(180deg,#fff,#f3fdf1)}
.unit.done::after{content:'★';position:absolute;top:6px;right:9px;color:var(--e);font-size:1rem}
.unit.locked{opacity:.5}
.unit .lv{position:absolute;top:8px;right:10px;font-size:.65rem;font-weight:800;color:#fff;background:var(--f);padding:1px 7px;border-radius:99px}

/* ---------- 出題 ---------- */
.q-shell{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--sh);padding:18px;margin-bottom:14px}
.q-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.chip{font-size:.7rem;font-weight:800;padding:4px 10px;border-radius:99px;background:var(--b-l);color:#0b6fa4}
.chip.lv{background:var(--f-l);color:#6d4fd0}
.chip.new{background:var(--d-l);color:#c23a5c}
.chip.rev{background:var(--e-l);color:#a06b00}
.q-progress{height:9px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:14px}
.q-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--b),var(--f));border-radius:99px;transition:width .4s}
.q-text{font-size:1.16rem;font-weight:800;line-height:1.75;margin-bottom:6px}
.lead{
  background:#f6f9fc;border:2px solid var(--line);border-left:6px solid var(--f);
  border-radius:14px;padding:12px 14px;margin-bottom:12px;font-size:.97rem;line-height:1.8;font-weight:600;
}
.lead .fig{margin:10px 0 2px}
.given{
  background:var(--c-l);border-radius:12px;padding:9px 13px;margin-bottom:10px;
  font-size:.88rem;font-weight:800;
}
.given .lab{display:block;font-size:.68rem;color:#2c7a4b;margin-bottom:2px;font-weight:900}
.q-text .hl{background:linear-gradient(transparent 62%, #ffe9a3 62%)}

.opts{display:grid;gap:10px;margin-top:14px}
.opts.two{grid-template-columns:1fr 1fr}
.opt{
  display:flex;align-items:center;gap:11px;text-align:left;width:100%;
  background:#fff;border:2.5px solid var(--line);border-radius:16px;padding:14px 15px;
  font-size:1.02rem;font-weight:700;cursor:pointer;box-shadow:0 3px 0 rgba(43,50,69,.07);
  transition:transform .08s,border-color .15s,background .15s;
}
.opt:active{transform:translateY(2px);box-shadow:0 1px 0 rgba(43,50,69,.07)}
.opt .k{
  flex:none;width:30px;height:30px;border-radius:10px;background:var(--b-l);color:#0b6fa4;
  display:grid;place-items:center;font-weight:900;font-size:.9rem;
}
.opt.ok{border-color:var(--ok);background:#effdf2}
.opt.ok .k{background:var(--ok);color:#fff}
.opt.ng{border-color:var(--ng);background:#fff1f1}
.opt.ng .k{background:var(--ng);color:#fff}
.opt.dim{opacity:.45}
.opt.gone{opacity:.25;text-decoration:line-through}

/* 数値入力 */
.numin{display:flex;flex-direction:column;gap:12px;margin-top:14px}
.numin .disp{
  height:64px;border:3px solid var(--ink);border-radius:16px;background:#fff;
  display:flex;align-items:center;justify-content:center;gap:6px;font-size:1.9rem;font-weight:900;
}
.numin .disp .unit{font-size:1rem;color:var(--sub);font-weight:800}
.numin .disp.blink{animation:chShake .4s}
.ta-bar{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.ta-time{margin-left:auto;font-size:1.5rem;font-weight:900;font-variant-numeric:tabular-nums;color:var(--a)}
.ta-time small{font-size:.7rem;color:var(--sub);margin-left:2px}
.numin .disp.ok{border-color:var(--ok);background:#effdf2;color:var(--ok)}
.numin .disp.ng{border-color:var(--ng);background:#fff1f1;color:#c53030}
.pad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.pad button{
  height:56px;border:none;border-radius:14px;background:#fff;box-shadow:0 3px 0 rgba(43,50,69,.12),var(--sh-sm);
  font-size:1.35rem;font-weight:900;color:var(--ink);cursor:pointer;
}
.pad button:active{transform:translateY(2px);box-shadow:0 1px 0 rgba(43,50,69,.12)}
.pad button.act{background:var(--e-l)}
.pad button.go{background:linear-gradient(180deg,#79dd79,#3fbf4f);color:#fff;box-shadow:0 3px 0 #2c9439}

/* 判定 */
.verdict{border-radius:20px;padding:16px;margin-top:14px;animation:chPop .35s}
.verdict.ok{background:linear-gradient(180deg,#effdf2,#ddf8e3);border:2.5px solid var(--ok)}
.verdict.ng{background:linear-gradient(180deg,#fff5f5,#ffe9e9);border:2.5px solid #f9a8a8}
.verdict .head{display:flex;align-items:center;gap:10px;font-size:1.15rem;font-weight:900;margin-bottom:8px}
.verdict.ok .head{color:var(--ok)} .verdict.ng .head{color:#c53030}
.why{background:#fff;border-radius:14px;padding:13px 15px;font-size:.95rem;line-height:1.8}
.why b{color:var(--a)}
.steps{counter-reset:st;margin-top:8px}
.step{
  counter-increment:st;position:relative;padding:9px 0 9px 38px;border-top:1px dashed var(--line);font-size:.94rem;
}
.step:first-child{border-top:none}
.step::before{
  content:counter(st);position:absolute;left:0;top:9px;width:26px;height:26px;border-radius:9px;
  background:var(--f);color:#fff;display:grid;place-items:center;font-weight:900;font-size:.8rem;
}
.hint-box{background:var(--e-l);border-radius:14px;padding:12px 14px;margin-top:10px;font-size:.94rem;animation:chPop .3s}
.hint-box .lab{font-size:.72rem;font-weight:900;color:#a06b00;margin-bottom:3px}

.q-tools{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.tool{
  background:#fff;border:2px solid var(--line);border-radius:13px;padding:8px 13px;
  font-size:.82rem;font-weight:800;color:var(--ink2);cursor:pointer;box-shadow:0 2px 0 rgba(43,50,69,.06);
}
.tool:active{transform:translateY(1px)}
.tool.on{background:var(--e-l);border-color:var(--e)}

/* メモ（手書き）＝ 計算用紙のかわり */
.memo{margin-top:12px;display:none}
.memo.open{display:block}
.memo-sheet{
  position:relative;border:2px solid #e0d6bd;border-radius:16px;overflow:hidden;
  background:#fffdf5;
  background-image:
    linear-gradient(rgba(150,170,190,.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(150,170,190,.16) 1px, transparent 1px);
  background-size:24px 24px;
}
.memo canvas{width:100%;height:260px;touch-action:none;display:block;background:transparent}
.memo.tall canvas{height:460px}
.memo-bar{display:flex;gap:8px;margin-top:8px;align-items:center;flex-wrap:wrap}
.memo-bar .sw{width:26px;height:26px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 2px var(--line);cursor:pointer}
.memo-bar .sw.on{box-shadow:0 0 0 3px var(--ink)}

/* コンボ・演出 */
.combo{
  position:fixed;top:14%;left:50%;transform:translateX(-50%);z-index:60;pointer-events:none;
  font-size:2.2rem;font-weight:900;color:#fff;text-shadow:0 3px 0 var(--a),0 6px 16px rgba(0,0,0,.25);
  animation:comboIn .9s ease-out forwards;
}
@keyframes comboIn{0%{opacity:0;transform:translateX(-50%) scale(.4)}25%{opacity:1;transform:translateX(-50%) scale(1.15)}70%{opacity:1;transform:translateX(-50%) scale(1)}100%{opacity:0;transform:translateX(-50%) translateY(-40px) scale(.9)}}
#fx{position:fixed;inset:0;pointer-events:none;z-index:70}

/* トースト */
.toast{
  position:fixed;left:50%;bottom:88px;transform:translateX(-50%);z-index:80;
  background:var(--ink);color:#fff;font-weight:800;font-size:.9rem;padding:12px 20px;border-radius:999px;
  box-shadow:0 8px 24px rgba(0,0,0,.3);animation:chPop .35s;max-width:90vw;text-align:center;
}

/* バッジ */
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(102px,1fr));gap:11px}
.badge{
  background:#fff;border-radius:18px;padding:13px 8px;text-align:center;box-shadow:var(--sh-sm);
  border:2px solid var(--line);
}
.badge .e{font-size:2rem;line-height:1.1;filter:grayscale(1);opacity:.28}
.badge.got{border-color:var(--e);background:linear-gradient(180deg,#fffdf3,#fff6dc)}
.badge.got .e{filter:none;opacity:1}
.badge .n{font-size:.75rem;font-weight:800;margin-top:4px}
.badge .d{font-size:.62rem;color:var(--sub);line-height:1.4;margin-top:2px}

/* おぼえ箱（Leitner） */
.boxes{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.box{background:#fff;border-radius:14px;padding:10px 4px;text-align:center;box-shadow:var(--sh-sm);border-bottom:4px solid var(--line)}
.box .n{font-size:1.3rem;font-weight:900}
.box .l{font-size:.62rem;color:var(--sub);font-weight:700;line-height:1.3}
.box.b1{border-color:#fca5a5} .box.b2{border-color:#fdba74} .box.b3{border-color:#fcd34d}
.box.b4{border-color:#86efac} .box.b5{border-color:#7dd3fc}

.train-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.tcard{display:flex;flex-direction:column;gap:2px;padding:14px;border-radius:16px;border:2px solid var(--line);
  background:#fff;box-shadow:0 3px 0 rgba(43,50,69,.07);transition:transform .1s}
.tcard:active{transform:translateY(2px)}
.tcard .e{font-size:1.6rem;line-height:1.1}
.tcard .t{font-weight:800;font-size:.95rem}
.tcard .d{font-size:.72rem;color:var(--sub);font-weight:700;line-height:1.5}
.tcard .rec{font-size:.7rem;font-weight:800;color:var(--a);margin-top:4px}
.tcard.t-time{border-color:#ffd7bd;background:linear-gradient(180deg,#fff,#fff8f2)}
.tcard.t-pat{border-color:#cfe8ff;background:linear-gradient(180deg,#fff,#f4faff)}
.tcard.t-step{border-color:#d5f2d0;background:linear-gradient(180deg,#fff,#f5fdf3)}
.tcard.t-print{border-color:#e5ddf7;background:linear-gradient(180deg,#fff,#faf8ff)}

/* 下タブ */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:50;display:flex;justify-content:space-around;
  background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-top:2px solid var(--line);
  padding:7px 6px calc(7px + env(safe-area-inset-bottom));
}
.tabbar a{flex:1;text-align:center;padding:5px 2px;border-radius:14px;color:var(--faint);font-weight:800;font-size:.64rem}
.tabbar a .i{display:block;font-size:1.32rem;line-height:1.25}
.tabbar a.on{color:var(--a);background:var(--a-l)}

/* 解法カード（learn） */
.pat{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--sh);padding:18px;margin-bottom:14px}
.pat h2{font-size:1.12rem;display:flex;gap:9px;align-items:center;margin-bottom:4px}
.pat .tagline{font-size:.85rem;color:var(--sub);font-weight:700;margin-bottom:12px}
.pat .keyline{
  background:linear-gradient(180deg,#fff8e6,#fff1cf);border:2.5px dashed var(--e);
  border-radius:16px;padding:13px 15px;font-weight:800;font-size:1rem;margin:12px 0;
}
.pat .keyline .lab{font-size:.7rem;color:#a06b00;font-weight:900;display:block;margin-bottom:3px}
.formula{
  display:inline-block;background:var(--ink);color:#fff;border-radius:12px;padding:7px 14px;
  font-weight:900;font-size:1rem;margin:4px 4px 4px 0;letter-spacing:.02em;
}
.formula.alt{background:var(--f)}
details.more{margin-top:10px;border-top:1px dashed var(--line);padding-top:10px}
details.more summary{font-weight:800;font-size:.9rem;color:var(--b);cursor:pointer;list-style:none}
details.more summary::-webkit-details-marker{display:none}
details.more summary::before{content:'▸ ';}
details.more[open] summary::before{content:'▾ ';}

/* テーブル（成績など） */
table.t{width:100%;border-collapse:collapse;font-size:.88rem}
table.t th,table.t td{padding:9px 8px;border-bottom:1px solid var(--line);text-align:left}
table.t th{color:var(--sub);font-size:.76rem;font-weight:800}
table.t td.num{text-align:right;font-weight:800;font-variant-numeric:tabular-nums}

/* 設定行 */
.row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line)}
.row:last-child{border-bottom:none}
.row .lbl{font-weight:800;font-size:.94rem}
.row .hint{font-size:.75rem;color:var(--sub);font-weight:600}
.seg{display:inline-flex;background:var(--line);border-radius:12px;padding:3px;gap:3px}
.seg button{border:none;background:transparent;padding:7px 13px;border-radius:10px;font-weight:800;font-size:.82rem;color:var(--sub);cursor:pointer}
.seg button.on{background:#fff;color:var(--ink);box-shadow:var(--sh-sm)}
input[type=range]{width:130px;accent-color:var(--a)}

@media (max-width:600px){
  .top h1{font-size:1.1rem}
  .q-text{font-size:1.08rem}
  .unit-grid{grid-template-columns:repeat(auto-fill,minmax(128px,1fr))}
  .opts.two{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(4,1fr);gap:6px}
  .stat .n{font-size:1.2rem}
}
@media print{.tabbar,.btn,.q-tools{display:none}}