:root{
  --ink:#1b1d21; --sub:#6b7280; --line:#e5e7eb; --bg:#f7f7f8; --card:#fff;
  --brand:#2f6fed; --brand-soft:#eaf1ff; --ok:#0f9d58; --warn:#b45309;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","PingFang SC","Noto Sans JP",system-ui,sans-serif;
  color:var(--ink); background:var(--bg); font-size:16px; line-height:1.5;
  padding-bottom:96px;
}
h1,h2,h3,p{margin:0}
button{font:inherit;color:inherit}

#top{
  position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
  padding:10px 14px 8px;
}
#top .ttl h1{font-size:16px;font-weight:700;letter-spacing:.2px}
#top .ttl p{font-size:12px;color:var(--sub);margin-top:2px}
#top .prog{display:flex;align-items:center;gap:10px;margin-top:8px}
#top .prog span{font-size:13px;font-variant-numeric:tabular-nums;color:var(--sub);min-width:56px}
.pbar{flex:1;height:6px;border-radius:99px;background:#eceef2;overflow:hidden}
.pbar i{display:block;height:100%;width:0;background:var(--brand);transition:width .25s ease}

.banner{margin:10px 14px 0;padding:10px 12px;border-radius:10px;font-size:13px;line-height:1.45}
.banner.warn{background:#fff7ed;color:var(--warn);border:1px solid #fed7aa}
.banner.ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.hide{display:none !important}

#tabs{
  display:flex;gap:8px;padding:10px 14px;overflow-x:auto;
  position:sticky;top:86px;z-index:20;background:var(--bg);
}
#tabs button{
  flex:0 0 auto;border:1px solid var(--line);background:var(--card);border-radius:999px;
  padding:7px 12px;font-size:13px;display:flex;align-items:center;gap:6px;cursor:pointer;
}
#tabs button.on{border-color:var(--brand);background:var(--brand-soft);color:#1d4ed8;font-weight:600}
#tabs button em{font-style:normal;font-size:11px;color:var(--sub);font-variant-numeric:tabular-nums}
#tabs button.done em{color:var(--ok)}

main{padding:4px 14px 20px}
.who{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;margin:8px 0 14px}
.who label{display:block;font-size:12px;color:var(--sub);margin-bottom:6px}
.who input{
  width:100%;border:1px solid var(--line);border-radius:9px;padding:10px 12px;font-size:16px;background:#fbfbfc;
}
.who input:focus{outline:none;border-color:var(--brand);background:#fff}
.who .tip{margin-top:8px;font-size:12px;color:var(--sub);line-height:1.5}

.sec{margin-bottom:8px}
.sechead{display:flex;align-items:baseline;gap:8px;margin:14px 2px 8px}
.sechead h2{font-size:15px}
.sechead .jp{font-size:11px;color:var(--sub)}

.blk{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 10px 6px;margin-bottom:10px}
.blkh{display:flex;align-items:baseline;justify-content:space-between;padding:0 2px 8px;border-bottom:1px dashed var(--line);margin-bottom:6px}
.blkh b{font-size:13px;font-weight:600}
.blkh span{font-size:11px;color:var(--sub);font-variant-numeric:tabular-nums}

.grid{display:flex;flex-direction:column}
.row{display:flex;align-items:center;gap:6px;padding:5px 0}
.row + .row{border-top:1px solid #f3f4f6}
.row .no{
  width:30px;flex:0 0 30px;text-align:right;font-size:13px;color:var(--sub);
  font-variant-numeric:tabular-nums;padding-right:4px;
}
.row .opt{
  flex:1 1 0;min-width:0;height:40px;border:1px solid var(--line);background:#fff;
  border-radius:9px;font-size:15px;font-weight:600;color:#374151;cursor:pointer;
  transition:background .12s,border-color .12s,color .12s;
}
.row .opt:active{transform:scale(.97)}
.row .opt.on{background:var(--brand);border-color:var(--brand);color:#fff}
.row .opt:disabled{opacity:.75}

#bar{
  position:fixed;left:0;right:0;bottom:0;z-index:40;
  background:rgba(255,255,255,.97);backdrop-filter:blur(8px);
  border-top:1px solid var(--line);padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  display:flex;align-items:center;gap:12px;
}
#bar .hint{flex:1;font-size:12px;color:var(--sub);line-height:1.35}
button.primary{
  background:var(--brand);color:#fff;border:none;border-radius:11px;
  padding:13px 20px;font-size:15px;font-weight:700;cursor:pointer;min-width:118px;
}
button.primary:disabled{background:#c7cdd8;cursor:default}
button.ghost{background:#fff;border:1px solid var(--line);border-radius:11px;padding:12px 16px;font-size:15px}

.modal{position:fixed;inset:0;z-index:60;background:rgba(17,24,39,.42);display:flex;align-items:center;justify-content:center;padding:20px}
.mbox{background:#fff;border-radius:16px;padding:20px;width:100%;max-width:380px;box-shadow:0 20px 50px rgba(0,0,0,.22)}
.mbox h3{font-size:16px;margin-bottom:10px}
.mbox p{font-size:14px;color:#374151;line-height:1.6}
.mbtns{display:flex;gap:10px;justify-content:flex-end;margin-top:18px}

.toast{
  position:fixed;left:50%;bottom:110px;transform:translate(-50%,10px);
  background:rgba(17,24,39,.92);color:#fff;font-size:13px;padding:9px 14px;border-radius:20px;
  opacity:0;pointer-events:none;transition:opacity .18s,transform .18s;z-index:70;max-width:80vw;text-align:center;
}
.toast.on{opacity:1;transform:translate(-50%,0)}

@media (min-width:640px){
  main{max-width:720px;margin:0 auto}
  #tabs,#top{max-width:none}
  .grid{display:grid;grid-template-columns:repeat(2,1fr);column-gap:18px}
  .row + .row{border-top:none}
  .row{padding:4px 0}
}