.error-highlight {
  animation: flash 0.6s;
}

@keyframes flash {
  0% { background: #ffcccc; }
  100% { background: transparent; }
}

/* スマートフォン対応 */
* {
  box-sizing: border-box;
}

html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

img {
        width: auto;
        max-width: 150px;
        height: 32px;
}

input,
select,
textarea,
button {
  max-width: 100%;
  font: inherit;
}

.yen,
.item .yen,
.grid-item.text-right {
  white-space: nowrap !important;
  word-break: keep-all;
  font-size: 18px
}

@media (max-width: 767px) {
  .site-header {
    padding: 12px 16px !important;
  }

  .site-header img {
    width: auto;
    max-width: 150px;
    height: 32px;
  }

  .hero {
    padding: 36px 16px 28px !important;
    text-align: center;
  }

  .hero h1 {
    margin: 6px 0 10px;
    font-size: clamp(2rem, 12vw, 3.2rem) !important;
    line-height: 1;
    overflow-wrap: anywhere;
  }

  .hero p {
    margin: 0;
    font-size: 13px;
    line-height: 1.7;
  }

  .wrap {
    width: 100% !important;
    max-width: none !important;
    padding: 0 12px 32px !important;
  }

  form.fn-pr-50 {
    padding-right: 0 !important;
  }

  .card {
    width: 100%;
    margin: 0 0 16px !important;
    border-radius: 12px;
  }

  .card-title {
    padding: 13px 14px !important;
    font-size: 13px !important;
    line-height: 1.5;
  }

  .inner {
    padding: 14px !important;
  }

  .notice {
    padding: 16px !important;
  }

  .notice h3 {
    margin-top: 0;
    font-size: 16px;
  }

  .notice ul {
    margin: 0;
    padding-left: 1.25em;
    font-size: 13px;
    line-height: 1.8;
  }

  .category {
    display: flex !important;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 8px;
  }

  .item {
    display: grid !important;
    grid-template-columns: auto 40px 32px 40px minmax(60px, 1fr);
    grid-template-rows: auto auto;
    gap: 7px;
    align-items: center;
    width: 100%;
    padding: 12px 0 !important;
  }

  .item .no {
    grid-column: 1;
    grid-row: 1;
  }

  .item .name {
    grid-column: 2 / -1;
    grid-row: 1;
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .item .name b,
  .item .name span {
    display: block;
    line-height: 1.35;
  }

  .item .name b {
    font-size: 11px;
  }

  .item .name span {
    margin-top: 3px;
    font-size: 10px;
  }

  .item .circle {
    width: 40px !important;
    height: 40px !important;
    min-width: 40px;
    padding: 0;
    touch-action: manipulation;
  }

  .item [id^="count-ch"] {
    grid-column: 3;
    grid-row: 2;
    width: 32px !important;
    text-align: center;
  }

  .item > button:nth-of-type(1) {
    grid-column: 2;
    grid-row: 2;
    justify-self: start;
  }

  .item > button:nth-of-type(2) {
    grid-column: 4;
    grid-row: 2;
    justify-self: start;
  }

  .item .yen {
    display: inline-block;
    grid-column: 5;
    grid-row: 2;
    align-self: center;
    justify-self: end;
    min-width: 0;
    font-size: 20px;
    white-space: nowrap !important;
  }

  .grid-container {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    width: 100%;
    gap: 8px;
  }

  .grid-container .grid-item {
    width: auto !important;
    min-width: 0;
  }

  .grid-container .grid-item.text-right {
    flex-wrap: nowrap !important;
    white-space: nowrap !important;
  }

  #discount_text,
  #discount_value {
    width: auto !important;
  }

  label {
    display: block;
    margin-top: 14px;
    line-height: 1.6;
  }

  .inputbox,
  input[type="date"],
  textarea,
  select {
    display: block;
    width: 100% !important;
    min-width: 0;
    margin: 6px 0 12px !important;
    padding: 12px !important;
    font-size: 16px !important;
  }

  #family_name,
  #person_name {
    display: block;
    width: 100% !important;
  }

  .hint {
    padding: 10px !important;
    font-size: 11px;
    line-height: 1.6;
  }

  .terms {
    max-height: 260px;
    padding: 12px !important;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    font-size: 11px;
    line-height: 1.7;
  }

  .agree-label {
    display: flex !important;
    align-items: flex-start;
    gap: 10px;
    margin-top: 0;
  }

  .agree-label input {
    width: 22px;
    height: 22px;
    min-width: 22px;
    margin-top: 2px;
  }

  .submit {
    display: block;
    width: calc(100% - 28px) !important;
    min-height: 52px;
    margin: 8px 14px !important;
    font-size: 16px;
    touch-action: manipulation;
  }

  .secure {
    padding: 0 14px 16px;
    text-align: center;
  }

  footer,
  .mt-8 {
    text-align: center;
  }
}

/* iPhone 5 / SE（第1世代）など、幅320px前後の端末 */
@media (max-width: 359px) {
  .site-header {
    padding: 10px 12px !important;
  }

  .site-header img {
    max-width: 130px;
    height: 28px;
  }

  .hero {
    padding: 26px 10px 22px !important;
  }

  .hero h1 {
    font-size: 2.25rem !important;
  }

  .hero p {
    font-size: 12px;
  }

  .wrap {
    padding-right: 8px !important;
    padding-left: 8px !important;
  }

  .card-title {
    padding: 11px 10px !important;
    font-size: 12px !important;
  }

  .inner {
    padding: 10px !important;
  }

  .notice {
    padding: 12px !important;
  }

  .notice h3 {
    font-size: 15px;
  }

  .notice ul {
    font-size: 12px;
  }

  .category {
    gap: 5px;
  }

  .category .tag {
    font-size: 10px !important;
  }

  .item {
    grid-template-columns: auto 36px 28px 36px minmax(0, 1fr);
    grid-template-rows: auto auto;
    gap: 5px;
    padding: 11px 0 !important;
  }

  .item .no {
    grid-column: 1;
    grid-row: 1;
  }

  .item .name {
    grid-column: 2 / -1;
    grid-row: 1;
  }

  .item > button:nth-of-type(1) {
    grid-column: 2;
    grid-row: 2;
  }

  .item [id^="count-ch"] {
    grid-column: 3;
    grid-row: 2;
    width: 28px !important;
  }

  .item > button:nth-of-type(2) {
    grid-column: 4;
    grid-row: 2;
  }

  .item .yen {
    grid-column: 5;
    grid-row: 2;
    align-self: center;
    justify-self: end;
  }

  .item .circle {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px;
  }

  .grid-container {
    gap: 5px;
  }

  .grid-container .yen,
  #count-total,
  #calc-total,
  #discount_text,
  #discount_value,
  #after_discount_value,
  #after_discount_text {
    font-size: 16px !important;
  }

  label {
    font-size: 13px;
  }

  .inputbox,
  input[type="date"],
  textarea,
  select {
    padding: 11px 10px !important;
  }

  .submit {
    width: calc(100% - 20px) !important;
    margin-right: 10px !important;
    margin-left: 10px !important;
  }
}