:root{
  --bg:#f1f5f9; --card:#fff; --ink:#0f172a; --sub:#64748b; --line:#e2e8f0;
  --brand:#2563eb; --brand-d:#1d4ed8; --ok:#16a34a; --ng:#dc2626; --warn:#f59e0b;
  --r:16px; --shadow:0 1px 3px rgba(15,23,42,.08),0 4px 12px rgba(15,23,42,.05);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP","Yu Gothic",sans-serif;
  font-size:16px; line-height:1.6; padding-bottom:env(safe-area-inset-bottom);
}
.screen{min-height:100vh}
.wrap{max-width:680px;margin:0 auto;padding:14px 14px 40px}
h1{margin:0;font-size:26px;font-weight:800;letter-spacing:.02em}
h1 span{display:block;font-size:13px;font-weight:600;color:var(--sub);letter-spacing:.1em;margin-top:2px}

/* hero */
.hero{text-align:center;padding:34px 12px 18px}
.hero-icon{font-size:44px;line-height:1}
.hero-sub{margin:10px 0 0;color:var(--sub);font-size:13px}

/* card */
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:16px;margin-bottom:14px}
.section-label{font-size:12px;font-weight:700;color:var(--sub);letter-spacing:.08em;margin:6px 2px 8px}
.lead{margin:0 0 10px;font-size:14px;color:var(--sub)}
.lead.center{text-align:center}
.note{font-size:12px;color:var(--sub);margin:10px 0 0}
.note.center{text-align:center}
.err{color:var(--ng);font-size:13px;margin-top:10px;min-height:19px;font-weight:600}

/* form */
label{display:block;font-size:12px;font-weight:700;color:var(--sub);margin-bottom:10px}
label.full{width:100%}
.row2{display:flex;gap:10px}
.row2 label{flex:1}
input[type=text],select{
  width:100%;margin-top:5px;padding:13px 12px;font-size:17px;font-family:inherit;
  border:2px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);font-weight:600;
}
input[type=text]:focus,select:focus{outline:none;border-color:var(--brand)}

/* tabs (登録/ログイン) */
.tabs2{display:flex;gap:6px;background:#f1f5f9;padding:4px;border-radius:12px;margin-bottom:16px}
.tab2{flex:1;padding:10px;border:0;background:transparent;border-radius:9px;font-size:14px;font-weight:700;color:var(--sub);font-family:inherit}
.tab2.on{background:#fff;color:var(--brand);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.pick-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.pick-list button{padding:10px 16px;border:2px solid var(--brand);background:#fff;color:var(--brand);border-radius:999px;font-weight:700;font-family:inherit;font-size:14px}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:13px 16px;border:0;border-radius:12px;font-size:15px;font-weight:700;
  font-family:inherit;background:#e2e8f0;color:var(--ink);cursor:pointer;
}
.btn.big{width:100%;padding:16px;font-size:17px;margin-top:6px}
.btn.small{padding:9px 12px;font-size:13px}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:active{background:var(--brand-d)}
.btn.ghost{background:#fff;color:var(--ink);border:2px solid var(--line)}
.btn.warn{background:var(--warn);color:#fff}
.btn.ok{background:var(--ok);color:#fff}
.btn.ng{background:var(--ng);color:#fff}
.btn:disabled{opacity:.4}
.btn-row{display:flex;gap:8px;margin-top:10px}
.btn-row .btn{flex:1}
.foot-row{margin-top:16px}
.foot-row .btn{font-size:13px;padding:12px 6px;gap:4px;white-space:nowrap}
.icon-btn{width:40px;height:40px;border:0;background:transparent;font-size:20px;color:var(--ink);font-family:inherit}

/* topbar */
.topwrap{position:sticky;top:0;z-index:20}
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 14px;background:#fff;border-bottom:1px solid var(--line);
}
.me{display:flex;align-items:baseline;gap:8px;min-width:0}

/* なまえチップ（タップでログアウトメニュー） */
.me-chip{
  border:2px solid var(--line);background:#fff;border-radius:999px;
  padding:6px 12px;font-family:inherit;color:var(--ink);cursor:pointer;
  display:flex;align-items:baseline;gap:7px;min-width:0;max-width:72%;
}
.me-chip:active{background:#f1f5f9}
.chip-caret{color:#94a3b8;font-size:11px;flex:none}
.logout-panel{
  position:absolute;top:100%;left:0;right:0;background:#fff;
  border-bottom:1px solid var(--line);box-shadow:0 10px 24px rgba(15,23,42,.14);
  padding:14px;text-align:center;
}
.logout-who{font-size:13px;color:var(--sub);font-weight:700;margin-bottom:9px}
.logout-who b{color:var(--ink);font-size:15px}
.logout-btn{width:100%;background:#fff;color:#b91c1c;border:2px solid #fecaca;font-size:15px;padding:14px}
.logout-btn:active{background:#fef2f2}
.logout-note{font-size:11px;color:var(--sub);margin-top:8px;line-height:1.5}
.me-name{font-weight:800;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.me-grade{font-size:11px;color:var(--sub);white-space:nowrap}
.wallet{display:flex;gap:10px;font-size:13px;font-weight:700;white-space:nowrap}
.coin{color:#b45309}.point{color:#7c3aed}

/* 回タブ */
.kai-tabs{display:flex;gap:7px;overflow-x:auto;padding:2px 2px 10px;-webkit-overflow-scrolling:touch}
.kai-tab{
  flex:0 0 auto;padding:9px 13px;border:2px solid var(--line);background:#fff;border-radius:11px;
  font-size:13px;font-weight:700;font-family:inherit;color:var(--sub);white-space:nowrap;line-height:1.25;
}
.kai-tab.on{border-color:var(--brand);background:var(--brand);color:#fff}
.kai-tab .kt-sub{display:block;font-size:10px;font-weight:600;opacity:.8}

/* 大問カード */
.cat-card{display:block;width:100%;text-align:left;border:0;font-family:inherit;
  background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:14px;margin-bottom:10px}
.cat-row{display:flex;align-items:center;gap:12px}
.cat-icon{width:42px;height:42px;flex:0 0 42px;border-radius:12px;color:#fff;font-weight:800;font-size:18px;
  display:flex;align-items:center;justify-content:center}
.cat-info{flex:1;min-width:0}
.cat-name{font-size:15px;font-weight:800}
.cat-sub{font-size:11px;color:var(--sub)}
.cat-go{color:#cbd5e1;font-size:16px}
.cat-meter{margin-top:11px}
.cat-meter-label{display:flex;justify-content:space-between;font-size:11px;color:var(--sub);margin-bottom:4px;font-weight:700}
.pct{font-variant-numeric:tabular-nums}
.pct.over{color:var(--ok)}
.lap{display:inline-block;background:#fef3c7;color:#b45309;border-radius:999px;padding:1px 7px;font-size:10px;margin-left:5px}
.meter{height:9px;background:#e2e8f0;border-radius:999px;overflow:hidden}
.meter.thin{height:4px;border-radius:0;background:#e2e8f0}
.meter-fill{height:100%;background:var(--brand);border-radius:999px;transition:width .3s}
.meter-fill.over{background:linear-gradient(90deg,var(--ok),#4ade80)}

/* ミス問・実力テスト */
.box-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.box-title{font-size:15px;font-weight:800}
.box-sub{font-size:11px;color:var(--sub);margin-top:2px}
.box-num{font-size:13px;color:var(--sub);white-space:nowrap}
.box-num b{font-size:22px;color:var(--ink)}
.exam-history{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.exam-chip{background:#ede9fe;color:#6d28d9;border-radius:999px;padding:3px 10px;font-size:11px;font-weight:700}

/* settings */
.set-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;font-size:13px;font-weight:700}
.toggle{display:flex;gap:4px;background:#f1f5f9;padding:3px;border-radius:10px}
.toggle button{padding:8px 12px;border:0;background:transparent;border-radius:8px;font-size:13px;font-weight:700;color:var(--sub);font-family:inherit}
.toggle button.on{background:#fff;color:var(--brand);box-shadow:0 1px 2px rgba(0,0,0,.1)}

/* quiz */
.quizbar{display:flex;align-items:center;justify-content:space-between;padding:6px 8px;background:#fff}
.quiz-title{font-size:13px;font-weight:800;flex:1;text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.quiz-num{font-size:13px;font-weight:800;color:var(--sub);min-width:52px;text-align:right;padding-right:8px;font-variant-numeric:tabular-nums}
.q-card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:20px 16px;margin-bottom:14px;text-align:center}
.q-src{font-size:11px;color:var(--sub);font-weight:700}
.q-ask{font-size:12px;color:var(--brand);font-weight:800;margin-top:8px}
.q-body{font-size:23px;font-weight:700;margin-top:10px;line-height:1.7;word-break:break-all}
.q-body .tgt{color:var(--ng);border-bottom:3px solid var(--ng);padding-bottom:1px;font-weight:900}
.q-body .blank{display:inline-block;min-width:2.2em;border-bottom:3px solid var(--brand);color:var(--brand);font-weight:900}
.q-hint{font-size:12px;color:var(--sub);margin-top:12px;background:#f8fafc;border-radius:10px;padding:8px 10px}

.choices{display:grid;grid-template-columns:1fr;gap:8px}
.choices.cols2{grid-template-columns:1fr 1fr}
.choice-btn{
  padding:15px 10px;border:2px solid var(--line);background:#fff;border-radius:13px;
  font-size:18px;font-weight:700;font-family:inherit;color:var(--ink);min-height:56px;
  display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.35;word-break:break-all;
}
.choice-btn:active{background:#f1f5f9}
.choice-btn.correct{border-color:var(--ok);background:#dcfce7;color:#14532d}
.choice-btn.wrong{border-color:var(--ng);background:#fee2e2;color:#7f1d1d}
.choice-btn.dim{opacity:.35}
.feedback{text-align:center;font-size:17px;font-weight:800;min-height:30px;margin-top:12px}
.feedback.ok{color:var(--ok)}
.feedback.ng{color:var(--ng)}

/* 手書き */
.canvas-holder{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);padding:12px;text-align:center}
#pad{
  display:block;margin:0 auto;background:#fff;border-radius:10px;
  touch-action:none;max-width:100%;cursor:crosshair;
}
.w-answer{
  font-size:44px;font-weight:800;color:var(--ok);letter-spacing:.12em;margin-bottom:10px;
  padding:8px;background:#f0fdf4;border-radius:12px;line-height:1.3;word-break:break-all;
}
.w-answer .yomi{display:block;font-size:14px;color:var(--sub);letter-spacing:0;font-weight:700;margin-top:4px}
.pad-tools .btn{font-size:13px;padding:11px}
.selfmark{margin-top:14px;background:#fff;border-radius:var(--r);box-shadow:var(--shadow);padding:14px}
/* 「一画もどす・ぜんぶ消す」と「答え合わせ」を離して誤タップを防ぐ */
.tool-panel{margin-top:10px}
.check-zone{margin-top:28px;padding-top:18px;border-top:2px dashed var(--line)}
.check-zone .btn.big{margin-top:0}

/* result */
.result-card{text-align:center;padding:26px 16px}
.result-emoji{font-size:52px;line-height:1}
.result-score{font-size:20px;color:var(--sub);margin-top:8px;font-weight:700}
.result-score b{font-size:52px;color:var(--ink);font-variant-numeric:tabular-nums}
.result-rate{font-size:17px;font-weight:800;color:var(--brand);margin-top:2px}
.result-msg{font-size:14px;color:var(--sub);margin-top:8px;font-weight:600}
.result-gain{margin-top:12px;font-size:14px;font-weight:800;color:#b45309}
.prog-line{display:flex;justify-content:space-between;font-size:12px;font-weight:700;margin:12px 0 5px}
.miss-list{margin-top:6px}
.miss-item{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}
.miss-item:last-child{border-bottom:0}
.miss-q{color:var(--sub);flex:1;min-width:0}
.miss-a{font-weight:800;color:var(--ok);white-space:nowrap}

/* box list */
.box-item{background:#fff;border-radius:13px;box-shadow:var(--shadow);padding:12px;margin-bottom:9px}
.box-item-top{display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.box-q{font-size:15px;font-weight:700;flex:1;min-width:0}
.box-streak{font-size:10px;color:var(--sub);white-space:nowrap}
.box-a{font-size:13px;color:var(--ok);font-weight:800;margin-top:4px}
.box-empty{text-align:center;color:var(--sub);padding:34px 0;font-size:14px}

/* ranking */
.rank-list{margin-top:8px}
.rank-row{display:flex;align-items:center;gap:10px;background:#fff;border-radius:12px;padding:11px 13px;margin-bottom:7px;box-shadow:var(--shadow);font-size:14px}
.rank-row.me{border:2px solid var(--brand);background:#eff6ff}
.rank-pos{font-weight:800;min-width:38px;font-size:15px}
.rank-name{flex:1;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank-coins{color:#b45309;font-weight:800;white-space:nowrap}
.rank-points{color:#7c3aed;font-weight:800;white-space:nowrap;font-size:13px}

@media (max-width:380px){
  .q-body{font-size:20px}
  .choice-btn{font-size:16px;padding:13px 8px;min-height:50px}
  .foot-row .btn{font-size:11px;padding:11px 3px}
}

/* 科目えらび画面: 名前は見出しと同じ大きさで出す（h1 span の小見出し指定を打ち消す） */
#screen-pick h1 #pick-name{
  display:inline;font-size:inherit;font-weight:inherit;color:inherit;
  letter-spacing:inherit;margin:0;
}
#screen-pick .cat-card{text-align:left}

/* ペンの太さ */
.pen-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;
  background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:8px 12px}
.pen-label{font-size:12px;font-weight:700;color:var(--sub)}
#pen-toggle button{min-width:56px}

/* ===== 同じ単元くりかえし警告（画面まっ赤） ===== */
.warn-overlay{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;padding:20px;
  background:rgba(185,28,28,.94);animation:warnflash .5s ease-in-out 3}
@keyframes warnflash{0%,100%{background:rgba(185,28,28,.94)}50%{background:rgba(127,29,29,.98)}}
.warn-box{background:#fff;border-radius:20px;padding:26px 20px;max-width:420px;width:100%;text-align:center;
  box-shadow:0 20px 50px rgba(0,0,0,.35)}
.warn-icon{font-size:52px;line-height:1}
.warn-box h2{margin:8px 0 6px;font-size:22px;color:#b91c1c;font-weight:800}
.warn-lead{font-size:15px;font-weight:700;margin:0 0 10px}
.warn-lead b{color:#b91c1c;font-size:20px}
.warn-note{font-size:13px;color:var(--sub);line-height:1.7;margin:0 0 6px}

/* ===== ほめ演出のトースト ===== */
.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);z-index:80;
  background:rgba(15,23,42,.92);color:#fff;font-weight:800;font-size:16px;
  padding:11px 22px;border-radius:999px;opacity:0;pointer-events:none;transition:opacity .18s,transform .18s}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.ok{background:rgba(22,163,74,.95)}
.toast.combo{background:linear-gradient(90deg,#f59e0b,#ef4444);font-size:18px}

/* ===== アバター・ステージ・ガチャ ===== */
.avatar-btn{border:0;background:transparent;padding:0;cursor:pointer;line-height:0}
.avatar-btn svg{width:88px;height:88px;border-radius:50%;box-shadow:0 4px 14px rgba(15,23,42,.18);border:3px solid #fff}
.avatar-preview svg{width:120px;height:120px;border-radius:50%;box-shadow:0 6px 20px rgba(15,23,42,.2);border:4px solid #fff}
.stage-badge{display:inline-flex;align-items:center;gap:7px;margin-top:8px;padding:5px 14px;border-radius:999px;
  background:#fff;box-shadow:var(--shadow);font-size:12px;font-weight:800}
.stage-badge .st-next{font-weight:600;color:var(--sub)}
#screen-pick.staged,#screen-home.staged{background-attachment:fixed}
.av-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;font-size:14px;font-weight:800}
.av-ctl{display:flex;align-items:center;gap:10px}
.av-ctl button{width:44px;height:44px;border:2px solid var(--line);background:#fff;border-radius:12px;
  font-size:16px;font-weight:800;color:var(--brand);font-family:inherit}
.av-ctl b{min-width:44px;text-align:center;font-size:19px;font-variant-numeric:tabular-nums}
.av-max{font-size:11px;color:var(--sub)}
.collection{display:flex;flex-wrap:wrap;gap:7px;margin-top:8px}
.coll-chip{border-radius:999px;padding:4px 11px;font-size:12px;font-weight:800;color:#fff}
.coll-empty{color:#94a3b8;font-size:13px;padding:10px 0}
.gacha-overlay{position:fixed;inset:0;z-index:95;display:flex;align-items:center;justify-content:center;
  background:rgba(15,23,42,.86);padding:20px}
.gacha-box{background:#fff;border-radius:22px;padding:30px 22px;text-align:center;max-width:380px;width:100%}
.capsule{font-size:80px;line-height:1;animation:shake .5s ease-in-out infinite}
@keyframes shake{0%,100%{transform:rotate(-12deg) scale(1)}50%{transform:rotate(12deg) scale(1.12)}}
.capsule.open{animation:pop .5s ease-out forwards}
@keyframes pop{0%{transform:scale(1)}60%{transform:scale(1.5)}100%{transform:scale(0);opacity:0}}
.gacha-result{min-height:110px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}
.gacha-rarity{font-size:13px;font-weight:900;letter-spacing:.1em;color:#fff;border-radius:999px;padding:3px 16px}
.gacha-name{font-size:26px;font-weight:900}
.gacha-kind{font-size:12px;color:var(--sub);font-weight:700}

/* ===== キャラのお絵かき ===== */
.draw-holder{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);padding:12px;text-align:center;margin-bottom:12px}
#av-canvas{display:block;margin:0 auto;background:#fff;border:2px solid var(--line);border-radius:14px;touch-action:none;max-width:100%;cursor:crosshair}
.draw-label{font-size:11px;font-weight:800;color:var(--sub);margin-bottom:6px}
.palette{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}
.sw{width:34px;height:34px;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 2px var(--line);cursor:pointer;padding:0}
.sw.on{box-shadow:0 0 0 3px var(--brand);transform:scale(1.12)}
.draw-row{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:6px}
/* 手書きキャラの表示 */
.avatar-btn img,.av-img{width:88px;height:88px;border-radius:50%;object-fit:cover;background:#fff;
  box-shadow:0 4px 14px rgba(15,23,42,.18);border:3px solid #fff}
.rank-av{width:38px;height:38px;border-radius:50%;object-fit:cover;background:#fff;border:2px solid var(--line);flex:none}
.rank-av-none{width:38px;height:38px;border-radius:50%;background:#f1f5f9;flex:none;
  display:flex;align-items:center;justify-content:center;font-size:16px;color:#cbd5e1}
.toast.ng{background:rgba(220,38,38,.95)}