/* サイト共通スタイル（Bootstrap 5 の上書き・補助） */
:root {
  --bs-body-font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}
body { min-height: 100vh; display: flex; flex-direction: column; }
.site-main { flex: 1 0 auto; }
.site-footer { flex-shrink: 0; }
.required::after { content: "必須"; font-size: .7em; color: #fff; background: #dc3545; border-radius: .2rem; padding: .1em .4em; margin-left: .4em; vertical-align: middle; }