/* HAKONIWA LAB 共通デザインシステム + 本アプリ固有スタイル */
:root {
  --color-bg: #efe6ce;
  --color-surface: #f8f2e3;
  --color-border: #dbcba0;
  --color-text: #2b2620;
  --color-text-muted: #6e6248;
  --color-primary: #a8631f;
  --color-primary-hover: #8b5119;
  --color-primary-contrast: #fbf3e2;
  --color-accent: #55704a;
  --color-badge-bg: #e4d6ae;
  --color-badge-text: #6e4a1e;
  --color-note-bg: #eee3c6;
  --color-warn-bg: #f6e6d2;
  --color-warn-border: #c98a4b;
  --color-warn-text: #7a4212;
  --radius-sm: 4px;
  --radius-lg: 10px;
  --shadow-card: 0 2px 8px rgba(43, 38, 32, 0.12);
  --max-width: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #211f1a;
    --color-surface: #2c2a22;
    --color-border: #423e30;
    --color-text: #f1e9d8;
    --color-text-muted: #b3a585;
    --color-primary: #e3a23b;
    --color-primary-hover: #edb259;
    --color-primary-contrast: #241c0d;
    --color-accent: #8fae7d;
    --color-badge-bg: #3a3626;
    --color-badge-text: #e3a23b;
    --color-note-bg: #262418;
    --color-warn-bg: #33261a;
    --color-warn-border: #8a5c2c;
    --color-warn-text: #f0c48c;
    --shadow-card: 0 2px 14px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, "Yu Gothic", sans-serif;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}
.page { max-width: var(--max-width); margin: 0 auto; padding: 44px 20px 56px; }

/* ヘッダー */
.hero { text-align: center; margin-bottom: 34px; }
.hero__mark {
  display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--color-primary); border: 1.5px solid var(--color-primary);
  border-radius: 999px; padding: 3px 13px; margin-bottom: 16px;
}
.hero__mark a { color: inherit; text-decoration: none; }
.hero__title { font-size: 1.7rem; font-weight: 800; margin: 0 0 10px; letter-spacing: 0.01em; }
.hero__lead { color: var(--color-text-muted); font-size: 0.92rem; margin: 0; }

/* カード */
.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: 22px; margin-bottom: 16px;
}
.card__title { font-size: 1.05rem; font-weight: 800; margin: 0 0 14px; }
.qnum {
  display: inline-block; background: var(--color-primary); color: var(--color-primary-contrast);
  font-size: 0.7rem; font-weight: 700; padding: 2px 9px; border-radius: 999px;
  margin-right: 8px; vertical-align: 2px;
}

/* 選択肢 */
.opts { display: grid; gap: 9px; }
.opt {
  display: block; border: 1.5px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 12px 14px; cursor: pointer; transition: border-color 0.15s ease, background-color 0.15s ease;
}
.opt:hover { border-color: var(--color-primary); }
.opt:has(input:checked) { border-color: var(--color-primary); background: var(--color-note-bg); }
.opt input { margin-right: 9px; }
.opt b { font-weight: 700; }
.opt small { display: block; color: var(--color-text-muted); font-size: 0.79rem; margin: 2px 0 0 24px; line-height: 1.6; }

/* 結果 */
.cond { background: var(--color-note-bg); border-radius: var(--radius-lg); padding: 14px 16px; margin: 0 0 14px; }
.cond dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; font-size: 0.88rem; }
.cond dt { font-weight: 700; white-space: nowrap; }
.cond dd { margin: 0; color: var(--color-text-muted); }

.warn {
  background: var(--color-warn-bg); border: 1px solid var(--color-warn-border);
  color: var(--color-warn-text); border-radius: var(--radius-lg);
  padding: 13px 16px; font-size: 0.85rem; margin: 0 0 14px;
}
.warn b { display: block; margin-bottom: 3px; }
.warn + .warn { margin-top: -4px; }

.btn {
  display: inline-block; border: none; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 700; padding: 10px 18px; cursor: pointer;
  text-decoration: none; transition: background-color 0.15s ease, opacity 0.15s ease;
  font-family: inherit;
}
.btn--primary { background: var(--color-primary); color: var(--color-primary-contrast); }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--outline {
  background: transparent; color: var(--color-accent);
  border: 1.5px solid var(--color-accent); padding: 8.5px 16.5px;
}
.btn--block { display: block; text-align: center; padding: 15px; font-size: 1rem; }

.backhint { font-size: 0.81rem; color: var(--color-text-muted); margin: 11px 2px 0; line-height: 1.7; }
.backhint b { color: var(--color-text); }

.urlbox { margin-top: 12px; }
.urlbox summary { cursor: pointer; color: var(--color-text-muted); font-size: 0.82rem; }
.urlbox code {
  display: block; margin-top: 8px; background: var(--color-note-bg); color: var(--color-text);
  border: 1px solid var(--color-border); padding: 11px; border-radius: var(--radius-sm);
  font-size: 0.72rem; word-break: break-all; line-height: 1.6;
}
#copy-btn { margin-top: 8px; background: transparent; color: var(--color-text-muted); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 6px 12px; font-size: 0.79rem; }
#copy-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* 解説セクション */
.section__heading {
  font-size: 0.92rem; font-weight: 700; color: var(--color-text-muted);
  letter-spacing: 0.06em; margin: 0 0 14px; padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}
.tbl { border-collapse: collapse; width: 100%; margin: 10px 0 16px; font-size: 0.82rem; }
.tbl th, .tbl td { border: 1px solid var(--color-border); padding: 6px 9px; text-align: left; }
.tbl th { background: var(--color-note-bg); white-space: nowrap; font-weight: 700; }
.terms { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; font-size: 0.86rem; }
.terms dt { font-weight: 700; white-space: nowrap; }
.terms dd { margin: 0; color: var(--color-text-muted); }

/* クロスリンク */
.crosslinks { display: grid; gap: 10px; }
.crosslink {
  display: block; text-decoration: none; color: inherit;
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 13px 16px; background: var(--color-surface); transition: border-color 0.15s ease;
}
.crosslink:hover { border-color: var(--color-primary); }
.crosslink b { display: block; font-size: 0.94rem; color: var(--color-primary); }
.crosslink span { display: block; font-size: 0.81rem; color: var(--color-text-muted); margin-top: 2px; }

/* 広告枠 */
.ad-slot { margin: 26px 0; min-height: 0; text-align: center; }

/* 免責・フッター */
.disclaimer {
  font-size: 0.79rem; color: var(--color-text-muted); line-height: 1.75;
  border: 1px dashed var(--color-border); border-radius: var(--radius-sm);
  padding: 14px 16px; margin-top: 24px;
}
.footer { text-align: center; font-size: 0.77rem; color: var(--color-text-muted); margin-top: 40px; }
.footer a { color: var(--color-text-muted); }

/* ---- 解説記事セクション / FAQ（トップページと guide/ で共有） ---- */
.faq {
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 0 14px; margin-bottom: 8px; background: var(--color-surface);
}
.faq:last-child { margin-bottom: 0; }
.faq > summary {
  cursor: pointer; font-weight: 700; font-size: 0.89rem; padding: 12px 0;
  list-style: none; display: flex; gap: 8px; align-items: flex-start;
}
.faq > summary::-webkit-details-marker { display: none; }
.faq > summary::before { content: "Q"; color: var(--color-primary); font-weight: 800; flex: none; }
.faq > summary:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.faq p { padding: 0 0 13px 18px; margin: 0; font-size: 0.86rem; color: var(--color-text-muted); line-height: 1.8; }
.prose p { font-size: 0.88rem; line-height: 1.85; margin: 0 0 12px; }
.prose p:last-child { margin-bottom: 0; }
.prose ul { font-size: 0.88rem; line-height: 1.85; margin: 0 0 12px; padding-left: 1.35em; }
.prose ul:last-child { margin-bottom: 0; }
.prose li { margin-bottom: 5px; }

@media (max-width: 480px) {
  .page { padding: 32px 14px 44px; }
  .hero__title { font-size: 1.4rem; }
  .cond dl, .terms { grid-template-columns: 1fr; gap: 2px 0; }
  .cond dd, .terms dd { margin-bottom: 7px; }
}