:root {
  --brand: #b8915a;      /* ふたごブック基調の金茶 */
  --brand-dark: #8a6a3b;
  --bg: #f7f4ef;
  --card: #ffffff;
  --ink: #2b2622;
  --muted: #8c8276;
  --ok: #2e9e5b;
  --ok-bg: #e7f6ec;
  --ng: #d2453c;
  --ng-bg: #fbe9e8;
  --line: #e7e0d6;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 6px 18px rgba(0,0,0,.05);
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}

/* ---- App bar ---- */
.appbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: var(--brand);
  color: #fff;
  box-shadow: var(--shadow);
}
.appbar h1 { font-size: 17px; margin: 0; flex: 1; font-weight: 700; letter-spacing: .02em; }
.appbar .back {
  background: rgba(255,255,255,.18); border: none; color: #fff;
  width: 34px; height: 34px; border-radius: 50%; font-size: 18px; cursor: pointer;
}
.appbar .back:hover { background: rgba(255,255,255,.3); }
.modeToggle { display: flex; background: rgba(255,255,255,.18); border-radius: 999px; padding: 2px; }
.modeToggle button {
  border: none; background: transparent; color: #fff; padding: 6px 12px;
  border-radius: 999px; font-size: 13px; cursor: pointer; font-weight: 600;
}
.modeToggle button.active { background: #fff; color: var(--brand-dark); }

/* ---- Layout ---- */
main { max-width: 820px; margin: 0 auto; padding: 16px 16px 80px; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 14px; }

/* ---- Home: category grid ---- */
.home-hint { color: var(--muted); font-size: 14px; margin: 4px 0 18px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.cat-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px; cursor: pointer; box-shadow: var(--shadow); text-align: left;
  transition: transform .08s ease, border-color .15s;
}
.cat-card:hover { transform: translateY(-2px); border-color: var(--brand); }
.cat-card .order { color: var(--brand); font-weight: 800; font-size: 13px; }
.cat-card .name { font-weight: 700; font-size: 16px; margin: 2px 0 8px; }
.cat-card .meta { color: var(--muted); font-size: 12px; }
.cat-card .bar { height: 6px; border-radius: 4px; background: var(--line); margin-top: 10px; overflow: hidden; }
.cat-card .bar > i { display: block; height: 100%; background: var(--ok); width: 0; }
.cat-card .badge { display:inline-block; margin-top:6px; font-size:11px; color: var(--ok); }

/* ---- Quiz ---- */
.cat-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.cat-head .order { color: var(--brand); font-weight: 800; }
.cat-head h2 { margin: 0; font-size: 20px; }
.cat-sub { color: var(--muted); font-size: 13px; margin-bottom: 16px; }

.dish {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 18px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.dish .dish-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.dish .dish-name { font-weight: 700; font-size: 17px; }
.dish .dish-label {
  font-size: 11px; color: var(--brand-dark); background: #f3ebdd;
  border: 1px solid #e7d8bd; padding: 1px 8px; border-radius: 999px;
}
.dish .nb { margin-left: auto; font-size: 12px; color: var(--muted); }
.dish .body { font-size: 15px; white-space: pre-wrap; word-break: break-word; }

/* blank input inline */
.blank {
  display: inline-block; min-width: 70px; max-width: 96%;
  border: none; border-bottom: 2px solid var(--brand); background: #fffdf8;
  font: inherit; color: var(--ink); text-align: center; padding: 1px 6px; margin: 0 2px;
  border-radius: 4px 4px 0 0;
}
.blank:focus { outline: none; background: #fff5e2; }
.blank.ok { border-color: var(--ok); background: var(--ok-bg); color: var(--ok); font-weight: 700; }
.blank.ng { border-color: var(--ng); background: var(--ng-bg); color: var(--ng); }
.correct {
  display: inline-block; font-size: 12px; color: var(--ok); font-weight: 700;
  background: var(--ok-bg); border-radius: 6px; padding: 0 6px; margin-left: 2px;
}
.flag { color: #c98a00; font-size: 11px; margin-left: 2px; cursor: help; }

/* study mode answer chip */
.ans-chip {
  display: inline-block; background: var(--ok-bg); color: var(--ok-dark, #1f7a44);
  border: 1px solid #bfe6cd; border-radius: 6px; padding: 0 7px; margin: 0 2px; font-weight: 700;
}

/* dish result line */
.dish-result { margin-top: 10px; font-size: 13px; font-weight: 700; }
.dish-result.ok { color: var(--ok); }
.dish-result.part { color: #c98a00; }

/* ---- sticky action bar ---- */
.actionbar {
  position: sticky; bottom: 0; z-index: 9;
  display: flex; gap: 10px; align-items: center;
  background: rgba(247,244,239,.96); backdrop-filter: blur(6px);
  border-top: 1px solid var(--line); padding: 12px 16px; margin: 0 -16px;
}
.btn {
  border: none; border-radius: 10px; padding: 12px 18px; font-size: 15px; font-weight: 700;
  cursor: pointer; flex: 0 0 auto;
}
.btn.primary { background: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-dark); }
.btn.ghost { background: #fff; color: var(--brand-dark); border: 1px solid var(--brand); }
.score { margin-left: auto; font-weight: 800; font-size: 16px; }
.score small { color: var(--muted); font-weight: 600; font-size: 12px; }