/* MY STUDY LAB — 共通スタイル（子ども / 保護者 共用） */
:root{
  --bg:#070b14; --bg2:#0d1424; --panel:rgba(255,255,255,.04); --line:rgba(148,163,184,.16);
  --fg:#e5edf7; --mute:#8b9bb4; --dim:#4b5a72;
  --cyan:#22d3ee; --purple:#a78bfa; --green:#34d399; --yellow:#fbbf24; --red:#fb7185; --orange:#fb923c;
  --unknown:#334155; --broken:#fb7185; --fragile:#fbbf24; --solid:#34d399;
  --r:18px; --nav:64px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","Noto Sans JP",sans-serif;font-size:16px;line-height:1.5;overscroll-behavior:none}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(60% 40% at 20% 0%,rgba(34,211,238,.13),transparent 60%),radial-gradient(50% 40% at 90% 10%,rgba(167,139,250,.14),transparent 60%),
  linear-gradient(rgba(148,163,184,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(148,163,184,.05) 1px,transparent 1px);
  background-size:auto,auto,28px 28px,28px 28px}
#app{position:relative;z-index:1;max-width:520px;margin:0 auto;min-height:100dvh;padding:env(safe-area-inset-top) 0 calc(var(--nav) + env(safe-area-inset-bottom)) 0}
.view{padding:14px 16px 24px;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select{font:inherit}
.hidden{display:none!important}

/* ---- typography ---- */
.eyebrow{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);font-weight:700}
.eyebrow.purple{color:var(--purple)} .eyebrow.green{color:var(--green)} .eyebrow.red{color:var(--red)} .eyebrow.yellow{color:var(--yellow)} .eyebrow.mute{color:var(--mute)}
h1{font-size:22px;margin:4px 0 2px;font-weight:800;letter-spacing:-.01em}
h2{font-size:17px;margin:0 0 8px;font-weight:700}
.mute{color:var(--mute)} .small{font-size:13px} .mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}
.center{text-align:center}

/* ---- layout bits ---- */
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.brand{font-weight:900;letter-spacing:.14em;font-size:13px;color:var(--fg)}
.brand b{color:var(--cyan)}
.lv{display:flex;align-items:center;gap:8px}
.lvchip{background:linear-gradient(135deg,var(--cyan),var(--purple));color:#04101a;font-weight:900;font-size:12px;padding:4px 9px;border-radius:999px;letter-spacing:.06em}
.xpbar{width:110px;height:8px;background:rgba(255,255,255,.08);border-radius:999px;overflow:hidden;position:relative}
.xpbar i{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--purple));border-radius:999px;transition:width .8s cubic-bezier(.2,.8,.2,1)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-bottom:14px;position:relative;overflow:hidden;backdrop-filter:blur(6px)}
.card.glow{border-color:rgba(34,211,238,.35);box-shadow:0 0 0 1px rgba(34,211,238,.08),0 10px 40px -10px rgba(34,211,238,.35)}
.card.glow::after{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,transparent,var(--cyan),transparent);animation:scan 2.6s linear infinite}
@keyframes scan{from{transform:translateX(-100%)}to{transform:translateX(100%)}}
.row{display:flex;align-items:center;gap:10px} .between{justify-content:space-between} .wrap{flex-wrap:wrap}
.grow{flex:1}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:15px 18px;border-radius:14px;font-weight:800;font-size:16px;letter-spacing:.02em;transition:transform .08s,filter .2s;user-select:none}
.btn:active{transform:scale(.98)}
.btn.primary{background:linear-gradient(135deg,var(--cyan),#3b82f6);color:#04101a;box-shadow:0 8px 24px -8px rgba(34,211,238,.6)}
.btn.ghost{background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--fg)}
.btn.sm{padding:10px 14px;font-size:14px;width:auto;border-radius:12px}
.btn.danger{background:rgba(251,113,133,.12);border:1px solid rgba(251,113,133,.35);color:var(--red)}
.btn[disabled]{opacity:.4;pointer-events:none}
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:700;background:rgba(255,255,255,.06);border:1px solid var(--line);color:var(--mute)}
.pill.cyan{color:var(--cyan);border-color:rgba(34,211,238,.35)} .pill.green{color:var(--green);border-color:rgba(52,211,153,.35)} .pill.red{color:var(--red);border-color:rgba(251,113,133,.35)} .pill.yellow{color:var(--yellow);border-color:rgba(251,191,36,.35)} .pill.purple{color:var(--purple);border-color:rgba(167,139,250,.35)}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block;background:var(--unknown)}
.dot.broken{background:var(--broken);box-shadow:0 0 8px var(--broken)} .dot.fragile{background:var(--fragile)} .dot.solid{background:var(--solid);box-shadow:0 0 8px var(--solid)}

/* ---- bottom nav ---- */
nav.tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;height:calc(var(--nav) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:rgba(7,11,20,.85);backdrop-filter:blur(14px);border-top:1px solid var(--line);display:flex;justify-content:center}
nav.tabs .in{display:flex;width:100%;max-width:520px}
nav.tabs button{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;font-weight:700;color:var(--dim);padding:10px 0}
nav.tabs button.on{color:var(--cyan)}
nav.tabs svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---- week dots ---- */
.week{display:flex;gap:6px}
.week div{flex:1;text-align:center;font-size:11px;color:var(--dim)}
.week b{display:block;width:100%;height:30px;border-radius:8px;background:rgba(255,255,255,.05);border:1px solid var(--line);margin-bottom:4px;position:relative;overflow:hidden}
.week b i{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(180deg,var(--cyan),var(--purple));border-radius:0 0 7px 7px}
.week .today{color:var(--cyan)} .week .today b{border-color:rgba(34,211,238,.5)}

/* ---- hex nodes / map ---- */
.hexgrid{display:flex;flex-wrap:wrap;gap:10px 8px}
.hex{width:74px;text-align:center;cursor:pointer;position:relative}
.hex .h{width:60px;height:66px;margin:0 auto 4px;display:flex;align-items:center;justify-content:center;font-size:22px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--unknown);color:#fff;transition:transform .2s,background .4s;position:relative}
.hex .h::before{content:"";position:absolute;inset:2px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--bg2);z-index:0}
.hex .h span{position:relative;z-index:1}
.hex.broken .h{background:var(--broken)} .hex.fragile .h{background:var(--fragile)} .hex.solid .h{background:var(--solid)}
.hex.solid .h::before{background:linear-gradient(160deg,#0f2a24,#0d1424)} .hex.broken .h::before{background:linear-gradient(160deg,#2a1420,#0d1424)} .hex.fragile .h::before{background:linear-gradient(160deg,#2a2210,#0d1424)}
.hex .n{font-size:10.5px;line-height:1.25;color:var(--mute);height:2.6em;overflow:hidden}
.hex.solid .n,.hex.broken .n,.hex.fragile .n{color:var(--fg)}
.hex.fog .h{background:#1b2333} .hex.fog .n{color:var(--dim)}
.hex.pop .h{animation:pop .6s cubic-bezier(.2,1.4,.3,1)}
@keyframes pop{0%{transform:scale(.4);opacity:0}100%{transform:scale(1);opacity:1}}
.hex.pulse .h{animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{filter:drop-shadow(0 0 0 rgba(34,211,238,0))}50%{filter:drop-shadow(0 0 10px rgba(34,211,238,.8))}}
.unit{margin-bottom:18px}
.unit h3{font-size:12px;letter-spacing:.14em;color:var(--mute);text-transform:uppercase;margin:0 0 8px;display:flex;align-items:center;gap:8px}
.unit h3::after{content:"";flex:1;height:1px;background:var(--line)}

/* ---- question ---- */
.qhead{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.seg{display:flex;gap:3px;flex:1;margin:0 12px}
.seg i{flex:1;height:5px;border-radius:3px;background:rgba(255,255,255,.08)}
.seg i.done{background:var(--cyan)} .seg i.cur{background:var(--purple);animation:blink 1s infinite alternate}
@keyframes blink{to{opacity:.4}}
.qbox{background:var(--bg2);border:1px solid var(--line);border-radius:var(--r);padding:22px 18px;min-height:150px;display:flex;flex-direction:column;justify-content:center;margin-bottom:14px}
.qtext{font-size:21px;font-weight:700;line-height:1.5;word-break:break-word}
.qtext.long{font-size:17px;font-weight:600}
.ans{display:flex;gap:8px;margin-bottom:10px}
.ans input{flex:1;padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.06);color:var(--fg);font-size:20px;font-family:ui-monospace,Menlo,monospace;outline:none}
.ans input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.15)}
.keys{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin-bottom:12px}
.keys button{padding:10px 0;border-radius:10px;background:rgba(255,255,255,.06);border:1px solid var(--line);font-size:16px;font-family:ui-monospace,Menlo,monospace;font-weight:700}
.keys button:active{background:rgba(34,211,238,.2)}
.choices{display:grid;gap:8px;margin-bottom:12px}
.choices button{text-align:left;padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid var(--line);font-size:16px;font-weight:600}
.choices button.on{border-color:var(--cyan);background:rgba(34,211,238,.12)}
.fb{border-radius:var(--r);padding:16px;margin-bottom:12px;animation:fade .25s}
.fb.ok{background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.4)}
.fb.ng{background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.4)}
.fb .t{font-weight:900;font-size:18px;letter-spacing:.04em}
.fb.ok .t{color:var(--green)} .fb.ng .t{color:var(--yellow)}
.stamp{display:inline-block;padding:6px 14px;border:3px solid var(--green);color:var(--green);font-weight:900;letter-spacing:.2em;transform:rotate(-6deg);border-radius:6px;animation:stamp .5s cubic-bezier(.2,1.6,.3,1)}
@keyframes stamp{0%{transform:rotate(-6deg) scale(2.2);opacity:0}100%{transform:rotate(-6deg) scale(1);opacity:1}}
.xpfloat{position:fixed;left:50%;top:38%;transform:translateX(-50%);font-weight:900;font-size:28px;color:var(--cyan);text-shadow:0 0 18px var(--cyan);pointer-events:none;animation:xpf 1.2s ease-out forwards;z-index:30}
@keyframes xpf{0%{opacity:0;transform:translate(-50%,10px) scale(.7)}20%{opacity:1;transform:translate(-50%,0) scale(1.1)}100%{opacity:0;transform:translate(-50%,-50px) scale(1)}}
.flash{position:fixed;inset:0;pointer-events:none;z-index:25;animation:flash .5s ease-out}
.flash.ok{background:radial-gradient(circle at 50% 40%,rgba(52,211,153,.35),transparent 60%)} .flash.ng{background:radial-gradient(circle at 50% 40%,rgba(251,191,36,.25),transparent 60%)}
@keyframes flash{from{opacity:1}to{opacity:0}}

/* ---- scanning animation ---- */
.scanning{height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}
.radar{width:160px;height:160px;border-radius:50%;border:1px solid rgba(34,211,238,.4);position:relative;overflow:hidden;background:radial-gradient(circle,rgba(34,211,238,.08),transparent 70%)}
.radar::before{content:"";position:absolute;inset:0;background:conic-gradient(from 0deg,rgba(34,211,238,.6),transparent 40%);animation:spin 1.2s linear infinite}
.radar::after{content:"";position:absolute;inset:30%;border-radius:50%;border:1px solid rgba(34,211,238,.4)}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---- list rows ---- */
.li{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)} .li:last-child{border-bottom:0}
.li .ic{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.06);font-size:18px}
.badge{width:64px;text-align:center;font-size:11px;color:var(--mute)}
.badge .b{width:54px;height:54px;margin:0 auto 4px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;background:rgba(255,255,255,.06);border:1px solid var(--line);filter:grayscale(1);opacity:.35}
.badge.got .b{filter:none;opacity:1;border-color:rgba(251,191,36,.5);box-shadow:0 0 18px -4px rgba(251,191,36,.6)}
.ring{width:96px;height:96px;border-radius:50%;background:conic-gradient(var(--cyan) var(--p,0%),rgba(255,255,255,.08) 0);display:flex;align-items:center;justify-content:center;position:relative}
.ring::before{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--bg)}
.ring b{position:relative;font-size:22px;font-weight:900}
.bars{display:flex;align-items:flex-end;gap:6px;height:90px}
.bars div{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;font-size:10px;color:var(--mute);height:100%;justify-content:flex-end}
.bars b{width:100%;border-radius:6px 6px 2px 2px;background:linear-gradient(180deg,var(--cyan),var(--purple));min-height:2px}
.field{margin-bottom:12px}
.field label{display:block;font-size:12px;color:var(--mute);margin-bottom:4px}
.field input{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--fg);outline:none}
.code{font-family:ui-monospace,Menlo,monospace;font-size:26px;letter-spacing:.3em;font-weight:900;color:var(--yellow)}
.toast{position:fixed;left:50%;bottom:calc(var(--nav) + 16px);transform:translateX(-50%);background:#111a2c;border:1px solid var(--line);padding:10px 16px;border-radius:12px;font-size:14px;z-index:40;animation:fade .2s}
.sheet{position:fixed;inset:0;z-index:35;background:rgba(0,0,0,.5);display:flex;align-items:flex-end;justify-content:center}
.sheet .in{width:100%;max-width:520px;background:#0f1729;border:1px solid var(--line);border-radius:22px 22px 0 0;padding:18px 18px calc(18px + env(safe-area-inset-bottom));animation:up .25s cubic-bezier(.2,.8,.2,1)}
@keyframes up{from{transform:translateY(40px);opacity:0}to{transform:none;opacity:1}}
.vcard{background:var(--bg2);border:1px solid var(--line);border-radius:var(--r);padding:26px 18px;text-align:center;min-height:210px;display:flex;flex-direction:column;justify-content:center;margin-bottom:12px}
.vcard .w{font-size:32px;font-weight:900} .vcard .p{color:var(--mute);font-family:ui-monospace,Menlo,monospace}
.rate{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.rate button{padding:14px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.05);font-weight:700}
.rate .r0{color:var(--red)} .rate .r1{color:var(--yellow)} .rate .r2{color:var(--cyan)} .rate .r3{color:var(--green)}
.errbox{padding:14px;border:1px solid rgba(251,113,133,.4);background:rgba(251,113,133,.08);border-radius:12px;font-size:13px}

/* ---- 保護者アプリ / 教材管理 ---- */
body.parent #app{max-width:760px}
body.parent nav.tabs .in{max-width:760px}
a{color:var(--cyan)}
.field select,.field textarea{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--fg);outline:none;font:inherit}
.field textarea{min-height:84px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.55}
.field textarea.tall{min-height:50vh}
.field select option,.field select optgroup{background:#0f1729;color:var(--fg)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--cyan)}
.field .hint{font-size:11.5px;color:var(--dim);margin-top:4px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 10px}
.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0 10px}
.segtabs{display:flex;gap:4px;padding:4px;background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;margin-bottom:14px}
.segtabs button{flex:1;padding:8px 6px;border-radius:9px;font-size:13px;font-weight:700;color:var(--mute)}
.segtabs button.on{background:rgba(34,211,238,.14);color:var(--cyan)}
.qitem{display:flex;gap:10px;align-items:flex-start;width:100%;text-align:left;padding:11px 2px;border-bottom:1px solid var(--line)}
.qitem:last-child{border-bottom:0}
.qitem:hover{background:rgba(255,255,255,.03)}
.qitem .lvl{flex:none;width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;background:rgba(255,255,255,.06);color:var(--mute)}
.qitem .lvl.l1{color:var(--green)} .qitem .lvl.l2{color:var(--cyan)} .qitem .lvl.l3{color:var(--purple)}
.qitem .qt{font-size:14px;line-height:1.45} .qitem .qid{font-size:11px;color:var(--dim);font-family:ui-monospace,Menlo,monospace}
.member{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)} .member:last-child{border-bottom:0}
.avatar{flex:none;width:42px;height:42px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px;background:linear-gradient(135deg,rgba(34,211,238,.25),rgba(167,139,250,.25));border:1px solid var(--line)}
.okbox{padding:12px 14px;border:1px solid rgba(52,211,153,.4);background:rgba(52,211,153,.08);border-radius:12px;font-size:13px}
.errbox ul{margin:6px 0 0;padding-left:18px}
.stat{flex:1;min-width:0;padding:10px 12px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.stat b{display:block;font-size:20px;font-weight:900} .stat span{font-size:11px;color:var(--mute)}
@media (max-width:480px){.grid3{grid-template-columns:1fr 1fr}.grid3>:last-child{grid-column:1/-1}}

/* ---- 数式キーパッド（画面キーボードの代わり） ---- */
.ansbox{min-height:56px;padding:12px 16px;border-radius:14px;border:1px solid rgba(34,211,238,.5);background:rgba(255,255,255,.06);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:22px;display:flex;align-items:center;flex-wrap:wrap;margin-bottom:10px;box-shadow:0 0 0 3px rgba(34,211,238,.12);word-break:break-all;cursor:text}
.ansbox .ph{color:var(--dim);font-size:15px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","Noto Sans JP",sans-serif}
.caret{display:inline-block;width:2px;height:1.15em;background:var(--cyan);margin:0 1px;vertical-align:middle;animation:caret 1s steps(1) infinite}
@keyframes caret{50%{opacity:0}}
.pad{margin-bottom:10px;user-select:none;-webkit-user-select:none}
.pad button{height:46px;border-radius:12px;background:rgba(255,255,255,.07);border:1px solid var(--line);font-size:19px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:700;touch-action:manipulation;transition:transform .06s,background .1s}
.pad button:active{background:rgba(34,211,238,.25);transform:scale(.95)}
.pad .kx{display:grid;gap:6px;margin-bottom:6px}
.pad .kx button{height:40px;font-size:17px;color:var(--cyan)}
.pad .kd{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.pad .dg{font-size:21px}
.pad .zero{grid-column:span 2}
.pad .op{color:var(--mute);font-size:17px}
.pad .op.small{font-size:13px;font-family:inherit}
.btn.idk{flex:0 0 36%;color:var(--mute)}
.qbox.compact{min-height:0;padding:16px 18px}
.choices button .mono{margin-right:6px}

/* ---- 解説（1 ステップずつ開く） ---- */
.explain{background:rgba(167,139,250,.07);border:1px solid rgba(167,139,250,.35);border-radius:var(--r);padding:16px;margin-bottom:10px;cursor:pointer;animation:fade .25s}
.explain .yours{margin:8px 0 4px;padding:8px 12px;border-radius:10px;background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.3);font-size:14px}
.steps{margin:10px 0 0;padding:0;list-style:none;counter-reset:st}
.steps li{counter-increment:st;display:none;position:relative;padding:9px 0 9px 36px;font-size:16px;line-height:1.55;border-top:1px dashed var(--line)}
.steps li.on{display:block;animation:fade .3s}
.steps li.on:first-child{border-top:0}
.steps li::before{content:counter(st);position:absolute;left:0;top:10px;width:24px;height:24px;border-radius:8px;background:rgba(167,139,250,.2);color:var(--purple);font-size:12px;font-weight:900;display:flex;align-items:center;justify-content:center}
.steps li.ans{font-weight:800;color:var(--green)}
.steps li.ans::before{content:"✓";background:rgba(52,211,153,.2);color:var(--green)}
.sheet .in.tall{max-height:88dvh;overflow-y:auto}

/* ---- 英単語 ---- */
.spk{flex:none;width:38px;height:38px;border-radius:12px;background:rgba(251,191,36,.1);border:1px solid rgba(251,191,36,.35);font-size:17px;display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;transition:transform .1s}
.spk.sm{width:30px;height:30px;font-size:14px;border-radius:9px}
.spk.on,.bigspk:active{transform:scale(.9);background:rgba(251,191,36,.3)}
.bigspk{width:96px;height:96px;border-radius:50%;font-size:40px;background:radial-gradient(circle,rgba(251,191,36,.25),rgba(251,191,36,.06));border:1px solid rgba(251,191,36,.5);box-shadow:0 0 30px -8px rgba(251,191,36,.6)}
.vcard .vmean{margin-top:14px;font-size:21px;font-weight:800}
.vcard .vex{margin-top:12px;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap}
.rate .r3 span{display:block;font-size:10px}
.mini{background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:12px}
.choices button.right{border-color:var(--green);background:rgba(52,211,153,.14)}
.choices button.wrong{border-color:var(--red);background:rgba(251,113,133,.12)}
.choices button:disabled{cursor:default}
.seg i.miss{background:var(--red)}
.spellbox{display:flex;justify-content:center;gap:5px;flex-wrap:wrap;margin-bottom:14px}
.spellbox span{width:32px;height:42px;border-bottom:3px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;font-family:ui-monospace,Menlo,monospace}
.spellbox span.f{border-color:var(--cyan)}
.spellbox.done span{border-color:var(--green);color:var(--green)}
.tiles{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:14px}
.tiles button{width:46px;height:50px;border-radius:12px;background:rgba(255,255,255,.08);border:1px solid var(--line);font-size:22px;font-weight:800;font-family:ui-monospace,Menlo,monospace;touch-action:manipulation}
.tiles button:active{background:rgba(34,211,238,.25)}
.tiles button:disabled{opacity:.15}

/* ---- 保護者：子どもの詳細 ---- */
.ctabs{display:flex;gap:4px;overflow-x:auto;padding:4px;background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;margin-bottom:14px;scrollbar-width:none}
.ctabs::-webkit-scrollbar{display:none}
.ctabs button{flex:1 0 auto;padding:8px 10px;border-radius:9px;font-size:13px;font-weight:700;color:var(--mute);white-space:nowrap}
.ctabs button.on{background:rgba(34,211,238,.14);color:var(--cyan)}
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.cal .h{font-size:10px;color:var(--mute);text-align:center}
.cal .c{aspect-ratio:1;border-radius:8px;background:rgba(255,255,255,.04);border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1}
.cal .c b{font-size:11px;font-weight:700;color:var(--fg)} .cal .c span{font-size:9.5px;color:#04101a;font-weight:800}
.cal .c.fut{opacity:.3} .cal .c.today{outline:2px solid var(--cyan);outline-offset:-2px}
details.drow{border-bottom:1px solid var(--line)} details.drow:last-child{border-bottom:0}
details.drow summary{display:flex;align-items:center;gap:10px;padding:10px 0;cursor:pointer;list-style:none}
details.drow summary::-webkit-details-marker{display:none}
details.drow summary::after{content:"›";color:var(--dim);transition:transform .2s;flex:none}
details.drow[open] summary::after{transform:rotate(90deg)}
details.drow .dbody{padding:0 0 12px 4px;animation:fade .2s}
details.miss summary{align-items:flex-start}
details.miss .qline{font-size:14.5px;margin-top:2px;line-height:1.45}
details .steps li{font-size:14px;padding:6px 0 6px 32px}
details .steps li::before{top:7px;width:22px;height:22px}
.stat{min-width:70px}
.cal .c b,.cal .c span{color:var(--calfg,var(--fg))}
.stats4{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:14px}
.stat b small{font-size:12px;font-weight:700;color:var(--mute)}

/* ---- 英文法 ---- */
.gform{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:17px;font-weight:800;color:var(--purple);background:rgba(167,139,250,.08);border:1px solid rgba(167,139,250,.35);border-radius:12px;padding:10px 14px;margin:10px 0 14px}
.blank{display:inline-block;min-width:64px;border-bottom:3px solid var(--purple);margin:0 4px}
.hl{color:var(--green);border-bottom:2px solid var(--green)}
.oline{min-height:58px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:10px;border-radius:14px;border:1px dashed rgba(167,139,250,.5);background:rgba(167,139,250,.05);margin-bottom:12px}
.oline button{padding:8px 11px;border-radius:10px;background:rgba(167,139,250,.18);border:1px solid rgba(167,139,250,.5);font-weight:700;font-size:16px}
.otiles{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:14px}
.otiles button{padding:10px 13px;border-radius:12px;background:rgba(255,255,255,.08);border:1px solid var(--line);font-weight:700;font-size:16px;touch-action:manipulation}
.otiles button:disabled{opacity:.15}
.lvsel{display:flex;gap:3px;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:10px;padding:3px}
.lvsel button{padding:4px 8px;border-radius:7px;font-size:11.5px;font-weight:700;color:var(--mute);white-space:nowrap}
.lvsel button.on{background:rgba(251,191,36,.18);color:var(--yellow)}

/* ---- 接続先サーバー設定 ---- */
.srvbox{border:1px solid var(--line);border-radius:12px;padding:10px 14px;background:rgba(255,255,255,.03);font-size:13px;color:var(--mute)}
.srvbox summary{cursor:pointer;list-style:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.srvbox summary::-webkit-details-marker{display:none}
.srvbox[open] summary{color:var(--fg)}

/* ---- 解答後：1 画面に収める ---- */
/* 「次へ」を画面下に固定（内容が長くてもスクロールせずに押せる） */
.nextbar{position:sticky;bottom:0;z-index:15;margin:4px -16px 0;padding:14px 16px calc(12px + env(safe-area-inset-bottom));background:linear-gradient(to bottom,rgba(7,11,20,0),var(--bg) 30%)}
.nextbar .row .btn{flex:1}
.nextbar .row .btn.ghost{flex:0 0 38%}
/* 答えたら問題文・選択肢を小さく（選択肢は全部残す：ほかの答えも見て覚える） */
.answered .qbox{min-height:0;padding:12px 16px;margin-bottom:10px}
.answered .qtext{font-size:17px}
.answered .qbox .pill,.answered #ja{display:none}
.answered .choices{gap:6px;margin-bottom:8px}
.answered .choices button{padding:9px 14px;font-size:15px}
.answered .bigspk{width:60px;height:60px;font-size:26px}
.answered .spellbox{margin-bottom:8px}
.answered .fb{padding:12px 14px;margin-bottom:0}
/* 問題を解いている画面は下のタブを隠すので、その分の余白もなくす */
body.focus #app{padding-bottom:env(safe-area-inset-bottom)}
body.focus .toast{bottom:90px}

/* ---- LINE などのアプリ内ブラウザの案内 ---- */
.inapp{border:1px solid rgba(251,191,36,.5);background:rgba(251,191,36,.1);border-radius:14px;padding:12px 14px;margin-bottom:14px;display:grid;gap:8px}
.inapp b{color:var(--yellow)}
.inapp .btn{width:100%;text-decoration:none}

/* ---- 学習時間の数字 ---- */
.bars.num{height:110px}
.bars.num b{max-height:70%}
.bars .v{font-size:10.5px;font-weight:800;color:var(--fg);font-variant-numeric:tabular-nums;white-space:nowrap;min-height:14px}
.week small{display:block;font-size:10px;font-weight:700;color:var(--fg);min-height:14px;white-space:nowrap}
.wkrow{display:grid;grid-template-columns:64px 1fr 76px;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.wkrow:last-child{border-bottom:0}
.wkbar{height:10px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden}
.wkbar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--cyan),var(--purple))}

/* ---- 学習範囲の設定 ---- */
.chks{display:flex;flex-wrap:wrap;gap:6px}
.chk{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.04);font-size:13px;color:var(--fg);cursor:pointer}
.chk input{width:auto;margin:0}