/* styles.css — v1.4 Accessibility candidate
 * 文字サイズ・主要な寸法は rem(ブラウザの文字サイズ設定・拡大に追随)。罫線・角丸などの細かい非文字寸法は px のまま。
 * 基準: 1rem = ブラウザ既定(通常16px)。 */
:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #222222;
  --sub: #595959;
  --accent: #2f5f8f;
  --accent-soft: #e6eef6;
  --border: #d9d6ce;
  --control-border: #8a8578;
  --warn-bg: #fff3cd;
  --warn-text: #6b5200;
  --focus: #b4690e;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif; font-size: 1rem; line-height: 1.7; overflow-wrap: anywhere; }
.banner { background: var(--warn-bg); color: var(--warn-text); font-size: 0.8125rem; padding: 0.375rem 1rem; text-align: center; }
.wrap { max-width: 40rem; margin: 0 auto; padding: 1rem; }
.screen { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem 1rem; margin-bottom: 1rem; }
h1 { font-size: 1.25rem; margin: 0 0 0.75rem; }
.plain { padding-left: 1.25rem; }
.small { font-size: 0.8125rem; color: var(--sub); }
.note { font-size: 0.875rem; background: var(--accent-soft); border-radius: 8px; padding: 0.625rem 0.75rem; }
.progress { font-size: 0.875rem; color: var(--sub); margin-bottom: 0.5rem; }
.prompt { font-size: 1.125rem; font-weight: normal; margin: 0.25rem 0 0.875rem; }
.btn { display: inline-block; min-height: 2.75rem; padding: 0.625rem 1.125rem; font-size: 1rem; border-radius: 8px; border: 1px solid var(--accent); background: #fff; color: var(--accent); cursor: pointer; margin: 0.25rem 0.375rem 0.25rem 0; }
.btn.primary { background: var(--accent); color: #fff; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }
.actions { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.375rem; }
.actions .btn { margin: 0; }
.options { display: grid; gap: 0.5rem; }
.option { text-align: left; font-size: 1.0625rem; padding: 0.75rem 0.875rem; border: 2px solid var(--control-border); border-radius: 8px; background: #fff; color: var(--text); cursor: pointer; min-height: 3rem; }
/* 選択状態は色だけでなく、太い枠と「✓」記号でも示す */
.option[aria-checked="true"] { border-color: var(--accent); border-width: 3px; background: var(--accent-soft); font-weight: bold; }
.option[aria-checked="true"]::before { content: "✓ "; }
.tile-answer { min-height: 3.5rem; border: 2px dashed var(--control-border); border-radius: 8px; padding: 0.5rem; margin-bottom: 0.625rem; display: flex; flex-wrap: wrap; gap: 0.375rem; align-items: center; }
.tile-answer .placeholder { color: var(--sub); font-size: 0.875rem; }
.tile-label { font-size: 0.8125rem; color: var(--sub); margin: 0.25rem 0; }
.tiles { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.5rem; }
.tile { font-size: 1.0625rem; padding: 0.5rem 0.875rem; border: 1px solid var(--accent); border-radius: 1.25rem; background: #fff; color: var(--text); cursor: pointer; min-height: 2.75rem; }
.tile.used { background: var(--accent-soft); }
.tile-tools { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.tile-tools .btn { font-size: 0.875rem; min-height: 2.75rem; padding: 0.375rem 0.75rem; margin: 0; }
.punct { font-size: 1.125rem; }
.row { border-top: 1px solid var(--border); padding: 0.75rem 0; }
.row:first-child { border-top: none; }
.row ul { margin: 0.375rem 0 0; padding-left: 1.25rem; font-size: 0.9375rem; }
.material { font-size: 0.875rem; color: var(--sub); margin-top: 0.375rem; }
.debug { margin-top: 0.5rem; font-size: 0.75rem; }
.debug summary { cursor: pointer; padding: 0.25rem 0; }
.debug pre { background: #1f2430; color: #e6e6e6; padding: 0.625rem; border-radius: 6px; overflow-x: auto; max-height: 60vh; white-space: pre-wrap; word-break: break-all; }
[tabindex="-1"]:focus { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
button:focus-visible, summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.group { border-top: 2px solid var(--border); padding-top: 0.625rem; margin-top: 0.875rem; }
.group h2 { font-size: 1.0625rem; margin: 0 0 0.125rem; }
.group h3 { font-size: 1rem; margin: 0 0 0.25rem; }
.group-confirmed h2 { color: #8a3b00; }
.group-indication h2 { color: #6b5200; }
.group-insufficient h2, .group-noDifficulty h2 { color: #2f5f8f; }
/* 画面には表示せず、読み上げソフトにだけ伝える要素 */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }