@charset "UTF-8";
/**********************************************************************
	教科書・教材 入口（page-kyokasyo-top.php）- className : kt-
***********************************************************************/
.kt {
  --kt-ink: #333;
  --kt-sub: #666;
  --kt-line: #e3e6ea;
  --kt-navy: #0d4270;
  --kt-pale: #f3f7fb;
  --kt-yellow: #f5c400;
  max-width: 1200px;
  margin: 0 auto;
  color: var(--kt-ink);
  font-size: 15px;
  line-height: 1.7;
  padding-bottom: 60px;
}
.kt *, .kt *::before, .kt *::after { box-sizing: border-box; }
/* テーマ共通のCSSが p・ul・section に余白を当てているので、ここで打ち消す */
.kt p { margin: 0; padding: 0; }
.kt ul { list-style: none; margin: 0; padding: 0; }
.kt li { margin: 0; padding: 0; }
.kt section { margin: 0; padding: 0; }
.kt a { text-decoration: none; }

.kt-lead { color: var(--kt-sub); margin: 0 0 24px !important; }

/* 小学校・中学校の2枠 */
.kt-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.kt .kt-group {
  background: #fff;
  border: 1px solid var(--kt-line);
  border-radius: 12px;
  padding: 24px 26px 26px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .06);
}
.kt .kt-group-title { font-size: 22px; text-align: left; margin: 0 0 18px; }

/* 教科の大きなボタン */
.kt-subjects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.kt a.kt-subject {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  min-height: 92px; padding: 12px 8px;
  background: var(--kt-navy); color: #fff;
  border: 2px solid var(--kt-navy); border-radius: 10px;
  transition: background-color .15s, color .15s;
}
.kt a.kt-subject:hover { background: #fff; color: var(--kt-navy); }
.kt-subject-name { font-size: 22px; font-weight: bold; line-height: 1.3; letter-spacing: .12em; text-indent: .12em; }
.kt-subject-note { font-size: 12px; line-height: 1.4; opacity: .9; white-space: nowrap; }
.kt-subject-note::after { content: " \2197"; }

/* 拡大教科書・訂正のお知らせ */
.kt-links { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px !important; }
.kt a.kt-link {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  min-height: 48px; padding: 8px 14px 8px 16px;
  background: #fff; color: var(--kt-navy);
  border: 2px solid var(--kt-navy); border-radius: 999px;
  font-size: 15px; font-weight: bold; line-height: 1.3;
  transition: background-color .15s;
}
.kt a.kt-link::after { content: "\203A"; font-size: 20px; line-height: 1; }
.kt a.kt-link:hover { background: var(--kt-pale); }

/* 関連ページ */
.kt .kt-related-title {
  font-size: 18px; font-weight: bold; color: var(--kt-navy);
  margin: 40px 0 14px; padding: 0 0 8px; background: none;
  border: 0; border-bottom: 2px solid var(--kt-navy);
}
.kt-related { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.kt a.kt-related-item {
  display: flex; flex-direction: column; gap: 4px; height: 100%;
  padding: 14px 16px; background: var(--kt-pale); color: var(--kt-ink);
  border: 1px solid var(--kt-line); border-radius: 10px;
  transition: box-shadow .15s;
}
.kt a.kt-related-item:hover { box-shadow: 0 4px 14px rgba(0, 0, 0, .12); }
.kt-related-name { font-size: 16px; font-weight: bold; color: var(--kt-navy); line-height: 1.4; }
.kt-related-name::after { content: " \203A"; }
.kt-related-desc { font-size: 13px; color: var(--kt-sub); line-height: 1.5; }

.kt a:focus-visible { outline: 3px solid var(--kt-yellow); outline-offset: 2px; }

/* タブレット縦（768〜1023px）：2枠は横並びのまま、中を詰める */
@media only screen and (max-width: 1023px) {
  .kt-groups { gap: 16px; }
  .kt .kt-group { padding: 20px 18px 22px; }
  .kt-subject-name { font-size: 20px; }
  .kt-subject-note { font-size: 11px; letter-spacing: -.02em; }
  .kt-links { grid-template-columns: 1fr; }
  .kt-related { grid-template-columns: repeat(2, 1fr); }
}

/* スマホ：縦に積む */
@media only screen and (max-width: 767px) {
  .kt { font-size: 14px; padding-bottom: 40px; }
  .kt-groups { grid-template-columns: 1fr; }
  .kt .kt-group { padding: 18px 16px 20px; }
  .kt .kt-group-title { font-size: 20px; margin-bottom: 14px; }
  .kt a.kt-subject { min-height: 76px; }
  .kt-links { grid-template-columns: 1fr 1fr; gap: 10px; }
  .kt a.kt-link { font-size: 13.5px; padding: 8px 10px 8px 12px; }
  .kt .kt-related-title { margin-top: 32px; }
  .kt-related { grid-template-columns: 1fr; gap: 10px; }
}