/* ==========================================
   Bootstrap 5 Form Base Styles (Modern CSS Nesting)
   ========================================== */

/* 1. 基本入力フィールド (.form-control / textarea) */
.form-control {
  display: block;
  width: 100%;
  padding: 0.4em 0.5em 0.4em;
  /* font-size: 1rem; */
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  appearance: none;
  border-radius: 0.375rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;

  &:focus {
    color: #212529;
    background-color: #fff;
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
  }

  &::placeholder {
    color: #6c757d;
    opacity: 1;
  }

  &:disabled,
  &[readonly] {
    background-color: #e9ecef;
    opacity: 1;
  }
}

/* 2. セレクトボックス (.form-select) */
.form-select {
  display: block;
  width: 100%;
  padding: 0.375rem 2.25rem 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  background-color: #fff;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 16px 12px;
  border: 1px solid #ced4da;
  border-radius: 0.375rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  appearance: none;

  &:focus {
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
  }

  &:disabled {
    background-color: #e9ecef;
  }
}

/* 3. チェックボックス & ラジオボタン (.form-check) */
.form-check {
  display: block;
  min-height: 1.5rem;
  padding-left: 1.5em;
  margin-bottom: 0.125rem;

  .form-check-input {
    float: left;
    margin-left: -1.5em;
    width: 1em;
    height: 1em;
    margin-top: 0.25em;
    vertical-align: top;
    background-color: #fff;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    border: 1px solid rgba(0, 0, 0, 0.25);
    appearance: none;
    print-color-adjust: exact;
    transition: background-color 0.15s ease-in-out, background-position 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;

    &[type="checkbox"] {
      border-radius: 0.25em;
    }

    &[type="radio"] {
      border-radius: 50%;
    }

    &:active {
      filter: brightness(90%);
    }

    &:focus {
      border-color: #86b7fe;
      outline: 0;
      box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
    }

    &:checked {
      background-color: #0d6efd;
      border-color: #0d6efd;

      &[type="checkbox"] {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='m6 10 3 3 6-6'/%3e%3c/svg%3e");
      }

      &[type="radio"] {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='2' fill='%23fff'/%3e%3c/svg%3e");
      }
    }

    &:disabled {
      pointer-events: none;
      filter: none;
      opacity: 0.5;
    }
  }

  .form-check-label {
    color: #212529;
  }
}

/* 4. フォームラベルと補足テキスト */
.form-label {
  margin-bottom: 0.5rem;
  font-size: 1rem;
  color: #212529;
}

.form-text {
  margin-top: 0.25rem;
  font-size: 0.875em;
  color: #6c757d;
}

button {
  cursor: pointer;
}

/* ==========================================
   Bootstrap 5 Validation Styles (Modern CSS Nesting)
   ========================================== */

/* 1. フィードバックメッセージ */
.valid-feedback,
.valid-tooltip {
  display: none;
  width: 100%;
  margin-top: 0.25rem;
  font-size: 0.875em;
  color: #198754;
}

.invalid-feedback,
.invalid-tooltip {
  display: none;
  width: 100%;
  margin-top: 0.25rem;
  font-size: 0.875em;
  color: #dc3545;
}

/* 2. 入力フィールド (.form-control) */
.form-control {
  /* Success State */
  &.is-valid,
  .was-validated &:valid {
    border-color: #198754;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);

    &:focus {
      border-color: #198754;
      box-shadow: 0 0 0 0.25rem rgba(25, 135, 84, 0.25);
    }
  }

  /* Danger State */
  &.is-invalid,
  .was-validated &:invalid {
    border-color: #dc3545;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);

    &:focus {
      border-color: #dc3545;
      box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, 0.25);
    }
  }
}

/* 3. セレクトボックス (.form-select) */
.form-select {
  &.is-valid,
  .was-validated &:valid {
    border-color: #198754;
  }

  &.is-invalid,
  .was-validated &:invalid {
    border-color: #dc3545;
  }
}

/* 4. チェックボックス・ラジオボタン (.form-check-input) */
.form-check-input {
  &.is-valid,
  .was-validated &:valid {
    border-color: #198754;

    &:checked {
      background-color: #198754;
    }
  }

  &.is-invalid,
  .was-validated &:invalid {
    border-color: #dc3545;

    &:checked {
      background-color: #dc3545;
    }
  }
}

/* 5. メッセージ表示切り替え */
.is-valid,
.was-validated :valid {
  ~ .valid-feedback,
  ~ .valid-tooltip {
    display: block;
  }
}

.is-invalid,
.was-validated :invalid {
  ~ .invalid-feedback,
  ~ .invalid-tooltip {
    display: block;
  }
}