/* ============================================================
   フォーム部品（お問い合わせ・資料ダウンロードで共通）
   Figma にフォームのデザインなし → 新サイトの白カード・トークンに合わせて作成

   <form class="form" action="#" method="post" data-form="contact" novalidate>
     <div class="form__row">
       <label class="form__label" for="f-name">お名前<span class="form__req">必須</span></label>
       <input class="form__input" id="f-name" name="…" type="text" required aria-describedby="f-name-error">
       <p class="form__error" id="f-name-error"></p>
     </div>
     <div class="form__row">
       <div class="form__select"><select class="form__input" …>…</select></div>
     </div>
     <textarea class="form__input form__textarea" …></textarea>
     <div class="form__agree">
       <input class="form__check" id="f-agree" type="checkbox" required aria-describedby="f-agree-error">
       <label for="f-agree"><a href="/privacy">プライバシーポリシー</a>に同意する</label>
     </div>
     <div class="form__actions"><button class="btn btn--primary btn--lg form__submit" type="submit">送信する</button></div>
   </form>

   エラー表示：入力欄に aria-invalid="true" を付け、.form__error に文言を入れる
   ============================================================ */

:root {
  --form-error: #c62828;        /* エラー文字・枠（トークンに赤が無いため） */
  --form-placeholder: #8aa0b6;  /* プレースホルダー文字 */
}

.form {
  display: flex;
  flex-direction: column;
  gap: 28px;
  color: var(--darktext);
}

.form__row { display: flex; flex-direction: column; gap: 8px; }

.form__label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--ff-noto);
  font-weight: 700;
  font-size: var(--fs-body);
  line-height: var(--lh);
}
.form__req {
  flex: none;
  padding: 1px 8px;
  border-radius: 30px;
  background: var(--cta);
  color: #fff;
  font-family: var(--ff-zen);
  font-weight: 500;
  font-size: 12px;
  line-height: var(--lh);
}

.form__input {
  display: block;
  width: 100%;
  min-height: 56px;
  padding: 14px 20px;
  border: 1px solid var(--sub);
  border-radius: 8px;
  background: #fff;
  color: var(--darktext);
  font-family: var(--ff-noto);
  font-weight: 400;
  font-size: 16px;  /* iOS のズーム防止のため SP でも 16px */
  line-height: var(--lh);
  transition: border-color .2s, box-shadow .2s;
  -webkit-appearance: none;
  appearance: none;
}
.form__input::placeholder { color: var(--form-placeholder); opacity: 1; }
.form__input:hover { border-color: var(--mainblue); }
.form__input:focus {
  outline: none;
  border-color: var(--mainblue);
  box-shadow: 0 0 0 3px var(--btn-sub);
}
.form__input[aria-invalid="true"] { border-color: var(--form-error); }
.form__input[aria-invalid="true"]:focus { box-shadow: 0 0 0 3px rgba(198, 40, 40, .15); }

.form__textarea { min-height: 200px; resize: vertical; }

/* セレクト（右端に矢印） */
.form__select { position: relative; }
.form__select .form__input { padding-right: 52px; cursor: pointer; }
.form__select .form__input:invalid { color: var(--form-placeholder); }
.form__select option { color: var(--darktext); }
.form__select::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 20px;
  width: 16px;
  height: 16px;
  margin-top: -8px;
  background: var(--mainblue);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M3 6l5 5 5-5' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M3 6l5 5 5-5' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
  pointer-events: none;
}

.form__error {
  color: var(--form-error);
  font-size: var(--fs-small);
  font-weight: 500;
  line-height: var(--lh);
}
.form__error:empty { display: none; }

/* 同意チェック */
.form__agree {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 12px;
  margin-top: 8px;
  font-size: var(--fs-body);
}
.form__agree label { cursor: pointer; }
.form__agree a { color: var(--mainblue); text-decoration: underline; }
.form__agree a:hover { text-decoration: none; }
.form__agree .form__error { flex-basis: 100%; text-align: center; }
.form__check {
  flex: none;
  width: 22px;
  height: 22px;
  margin: 0;
  border: 1px solid var(--sub);
  border-radius: 4px;
  background: #fff center / 14px 14px no-repeat;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  transition: background-color .2s, border-color .2s;
}
.form__check:checked {
  border-color: var(--cta);
  background-color: var(--cta);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14' fill='none'%3E%3Cpath d='M2.5 7.5l3 3 6-7' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}
.form__check:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--btn-sub); }
.form__check[aria-invalid="true"] { border-color: var(--form-error); }

.form__actions { display: flex; flex-direction: column; align-items: center; gap: 12px; margin-top: 12px; }
.form__actions .form__error { text-align: center; }
.form__submit { min-width: 320px; border: 0; cursor: pointer; }
.form__submit:disabled { opacity: .6; cursor: wait; }

@media (max-width: 767px) {
  .form { gap: 20px; }
  .form__row { gap: 6px; }
  .form__label { font-size: 14px; }
  .form__req { font-size: 11px; }
  .form__input { min-height: 48px; padding: 11px 14px; }
  .form__select .form__input { padding-right: 44px; }
  .form__select::after { right: 14px; }
  .form__textarea { min-height: 160px; }
  .form__agree { font-size: 14px; }
  .form__actions { margin-top: 4px; }
  .form__submit { width: 100%; min-width: 0; }
}