/* 4行対応／中央寄せコマンドバー */
:root {
  --bg: #fff;
  --fg: #121212;
  --muted: #666;
  --primary: #0066cc;
  --primary-2: #0052a3;
  --danger: #c62828;
  --ok: #0a7d0a;
  --panel: #f7f9fc;
  --border: #e1e5ee;
  --container: 1000px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.6;
}
.container { max-width: var(--container); margin: 0 auto; padding: 0 12px; }
.app-header { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 1px solid var(--border); }
.app-header .row { display: flex; align-items: center; justify-content: center; padding: .6rem 0; }
.app-header h1 { font-size: 1.1rem; margin: 0; font-weight: 700; }
.cmdbar { position: sticky; top: 48px; z-index: 101; display: grid; grid-template-columns: 1fr auto 1fr; gap: .5rem; align-items: center; background: #fff; border-bottom: 1px solid var(--border); padding: .4rem .2rem; }
.cmdbar .left, .cmdbar .right { display: flex; gap: .35rem; justify-content: center; }
.cmdbar .center { text-align: center; }
.mode-label { font-weight: 600; margin-right: .5rem; }
.progress-label { color: var(--muted); }
main { padding: 1rem 0; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; margin: 0 0 1rem; }
button, input, select { font-size: 1rem; }
button { border: 1px solid var(--border); background: #fff; padding: .5rem .75rem; border-radius: 8px; cursor: pointer; }
button.primary { background: var(--primary); color: #fff; border-color: var(--primary-2); }
button.primary:hover { background: var(--primary-2); }
button.ghost { background: #fff; }
button.hidden { display: none; }
.view { display: none; }
.view.active { display: block; }
.mode-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: .5rem; margin: .5rem 0 1rem; }
.mode { padding: 1rem; text-align: left; }
.inline-controls { display: flex; flex-wrap: wrap; gap: 1rem; margin: .5rem 0 1rem; }
.io-area { display: flex; gap: .5rem; flex-wrap: wrap; }
.question-text { font-weight: 600; font-size: 1.05rem; margin: .25rem 0 .75rem; }
.entry-table { width: 100%; border-collapse: collapse; background: #fff; }
.entry-table th, .entry-table td { border: 1px solid var(--border); padding: .4rem .5rem; }
.entry-table th { background: #f1f4fb; text-align: left; }
.entry-table .num { text-align: right; }
.entry-table select, .entry-table input[type="number"] { width: 100%; }
.btn-row { margin-top: .8rem; }
.feedback { margin-top: 1rem; }
.feedback .judge { font-weight: 700; }
.feedback .ok { color: var(--ok); }
.feedback .ng { color: var(--danger); }
.feedback .tag { display: inline-block; background: #eaf0ff; border: 1px solid #cdd7ff; color: #1d3faa; padding: .15rem .4rem; border-radius: 9999px; margin-right: .35rem; font-size: .85rem; }
.feedback table { width: 100%; border-collapse: collapse; margin-top: .5rem; background: #fff; }
.feedback th, .feedback td { border: 1px solid var(--border); padding: .4rem .5rem; }
.feedback th { background: #f1f4fb; text-align: left; }
.timer { margin-top: .5rem; color: var(--muted); text-align: center; }
kbd { background: #eee; padding: 0 .25rem; border-radius: 4px; border: 1px solid #ddd; }
.app-footer { border-top: 1px solid var(--border); text-align: center; padding: .75rem 0; color: var(--muted); }
@media (max-width: 700px){
  .cmdbar { grid-template-columns: 1fr; gap: .3rem; top: 46px; }
  .cmdbar .left, .cmdbar .right { justify-content: center; }
  .panel { padding: .75rem; }
  .entry-table th { font-size: .95rem; }
}