/* ========================================
   購入手続きページ専用スタイル（rem基準）
   1rem = 10px @1920px
   ======================================== */

/* パンくずリスト */
.checkout-breadcrumb {
    background-color: var(--cream-bg);
    padding: 2.8rem 0 0;
}

.checkout-breadcrumb-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 11.2rem;
}

.checkout-breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    font-size: 2rem;
    color: var(--text-light);
}

.checkout-breadcrumb-list a {
    color: var(--accent-blue);
    font-weight: 500;
}

.checkout-breadcrumb-list a:hover {
    text-decoration: underline;
}

.checkout-breadcrumb-separator {
    color: var(--text-light);
    font-size: 1.8rem;
}

.checkout-breadcrumb-current {
    color: var(--text-color);
    font-weight: 600;
}

/* ========================================
   ステップバー（カートと共通デザイン）
   ======================================== */
.checkout-steps {
    background-color: var(--cream-bg);
    padding: 5.6rem 0 4.2rem;
}

.checkout-steps-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 11.2rem;
}

.checkout-steps-list {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    max-width: 90rem;
    margin: 0 auto;
}

.checkout-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    flex-shrink: 0;
}

.checkout-step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 5.6rem;
    height: 5.6rem;
    border-radius: 50%;
    font-size: 2.4rem;
    font-weight: 700;
    background-color: var(--bg-white);
    border: 0.28rem solid var(--border-color);
    color: var(--text-light);
    transition: all 0.3s ease;
}

.checkout-step.active .checkout-step-number,
.checkout-step.completed .checkout-step-number {
    background-color: var(--primary-color);
    border-color: var(--primary-dark);
    color: #fff;
}

.checkout-step-label {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-light);
    white-space: nowrap;
}

.checkout-step.active .checkout-step-label,
.checkout-step.completed .checkout-step-label {
    color: var(--text-color);
}

.checkout-step-line {
    flex: 1;
    height: 0.28rem;
    background-color: var(--border-color);
    margin: 0 2.8rem;
    margin-bottom: 3.2rem;
    min-width: 5.6rem;
}

.checkout-step-line.active {
    background-color: var(--primary-color);
}

/* ========================================
   購入手続きセクション
   ======================================== */
.checkout-section {
    background-color: var(--cream-bg);
    padding-bottom: 8.4rem;
}

.checkout-section-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 11.2rem;
}

.checkout-title {
    font-size: 4.2rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 4.2rem;
    padding-bottom: 1.4rem;
    border-bottom: 0.42rem solid var(--primary-color);
    display: inline-block;
}

/* 2カラムレイアウト */
.checkout-content {
    display: grid;
    grid-template-columns: 1fr 42rem;
    gap: 5.6rem;
    align-items: start;
}

/* ========================================
   フォームセクション
   ======================================== */
.checkout-form-area {
    display: flex;
    flex-direction: column;
    gap: 4.2rem;
}

.checkout-form-section {
    background-color: var(--bg-white);
    border-radius: 1.4rem;
    padding: 3.5rem;
}

.checkout-form-heading {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 3.5rem;
    padding-bottom: 1.75rem;
    border-bottom: 0.18rem solid var(--border-color);
}

.checkout-form-heading-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4.2rem;
    height: 4.2rem;
    flex-shrink: 0;
    color: var(--primary-dark);
}

.checkout-form-heading-icon svg {
    width: 3.2rem;
    height: 3.2rem;
}

.checkout-optional {
    font-size: 1.82rem;
    font-weight: 400;
    color: var(--text-light);
    background-color: var(--cream-bg);
    padding: 0.35rem 1.4rem;
    border-radius: 0.7rem;
}

/* お届け先選択 */
.checkout-address-options {
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
}

.checkout-address-edit {
    display: inline-block;
    font-size: 1.82rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-top: 1.75rem;
}

.checkout-address-edit:hover {
    text-decoration: underline;
}

/* フォームグリッド */
.checkout-form-grid {
    display: flex;
    flex-direction: column;
    gap: 2.8rem;
}

.checkout-form-row {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.checkout-form-row-half {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.8rem;
}

.checkout-form-group {
    display: flex;
    flex-direction: column;
    gap: 1.05rem;
}

.checkout-form-group-short {
    max-width: 35rem;
}

.checkout-label {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-color);
}

.checkout-required {
    display: inline-block;
    font-size: 1.68rem;
    font-weight: 600;
    color: #fff;
    background-color: var(--danger-color);
    padding: 0.21rem 0.84rem;
    border-radius: 0.42rem;
    margin-left: 0.7rem;
    vertical-align: middle;
}

/* 入力欄 */
.checkout-input {
    width: 100%;
    padding: 1.75rem 2.1rem;
    font-size: 2.24rem;
    font-family: inherit;
    color: var(--text-color);
    background-color: var(--cream-bg);
    border: 0.18rem solid var(--border-color);
    border-radius: 1.05rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.checkout-input::placeholder {
    color: #aaa;
}

.checkout-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.28rem rgba(236, 196, 49, 0.2);
    background-color: var(--bg-white);
}

.checkout-input.error {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 0.28rem rgba(220, 53, 69, 0.15);
}

/* セレクトボックス */
.checkout-select {
    width: 100%;
    padding: 1.75rem 4.2rem 1.75rem 2.1rem;
    font-size: 2.24rem;
    font-family: inherit;
    color: var(--text-color);
    background-color: var(--cream-bg);
    border: 0.18rem solid var(--border-color);
    border-radius: 1.05rem;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='16' height='16' fill='none' stroke='%23333' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.4rem center;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.checkout-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.28rem rgba(236, 196, 49, 0.2);
    background-color: var(--bg-white);
}

/* ========================================
   支払い方法ラジオボタン
   ======================================== */
.checkout-payment-options {
    display: flex;
    flex-direction: column;
    gap: 2.1rem;
}

.checkout-radio-card {
    display: flex;
    align-items: flex-start;
    gap: 2.1rem;
    padding: 2.8rem;
    background-color: var(--cream-bg);
    border: 0.18rem solid var(--border-color);
    border-radius: 1.05rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.checkout-radio-card:hover {
    border-color: var(--primary-color);
}

.checkout-radio-card.active {
    background-color: var(--primary-light);
    border-color: var(--primary-color);
}

.checkout-radio-card input[type="radio"] {
    display: none;
}

.checkout-radio-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.8rem;
    height: 2.8rem;
    border-radius: 50%;
    border: 0.21rem solid var(--border-color);
    flex-shrink: 0;
    margin-top: 0.28rem;
    transition: all 0.2s ease;
}

.checkout-radio-card.active .checkout-radio-mark {
    border-color: var(--primary-dark);
}

.checkout-radio-card.active .checkout-radio-mark::after {
    content: '';
    width: 1.4rem;
    height: 1.4rem;
    border-radius: 50%;
    background-color: var(--primary-color);
}

.checkout-radio-content {
    display: flex;
    flex-direction: column;
    gap: 0.56rem;
}

.checkout-radio-label {
    font-size: 2.24rem;
    font-weight: 600;
    color: var(--text-color);
}

.checkout-radio-desc {
    font-size: 1.82rem;
    color: var(--text-light);
}

/* クレジットカード入力欄（未使用時は非表示） */
.checkout-credit-fields {
    padding: 2.8rem;
    background-color: var(--bg-white);
    border: 0.18rem solid var(--border-color);
    border-radius: 1.05rem;
    display: flex;
    flex-direction: column;
    gap: 2.1rem;
    transition: all 0.3s ease;
}

.checkout-credit-fields.hidden {
    display: none;
}

/* ========================================
   注文サマリー（右サイドバー）
   ======================================== */
.checkout-summary {
    background-color: var(--bg-white);
    border-radius: 1.4rem;
    padding: 3.5rem;
    position: sticky;
    top: 2.8rem;
}

.checkout-summary-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 2.8rem;
    padding-bottom: 1.4rem;
    border-bottom: 0.18rem solid var(--border-color);
}

/* ミニ商品リスト */
.checkout-summary-items {
    display: flex;
    flex-direction: column;
    gap: 2.1rem;
    margin-bottom: 2.8rem;
}

.checkout-summary-item {
    display: flex;
    gap: 1.75rem;
    align-items: center;
}

.checkout-summary-item-img {
    width: 7rem;
    height: 7rem;
    border-radius: 0.7rem;
    overflow: hidden;
    flex-shrink: 0;
}

.checkout-summary-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.checkout-summary-item-info {
    min-width: 0;
}

.checkout-summary-item-name {
    font-size: 1.82rem;
    font-weight: 600;
    color: var(--text-color);
    line-height: 1.4;
    margin-bottom: 0.35rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.checkout-summary-item-detail {
    font-size: 1.82rem;
    color: var(--text-light);
}

.checkout-summary-divider {
    height: 0.18rem;
    background-color: var(--border-color);
    margin-bottom: 2.1rem;
}

.checkout-summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 2.24rem;
    color: var(--text-color);
    margin-bottom: 1.75rem;
}

.checkout-summary-shipping {
    font-weight: 600;
    color: #16a34a;
}

.checkout-summary-total {
    font-size: 2.52rem;
    font-weight: 700;
    margin-bottom: 3.5rem;
}

.checkout-summary-total-price {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-dark);
}

/* 注文確定ボタン */
.checkout-order-btn {
    display: block;
    width: 100%;
    padding: 2.1rem;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 1.05rem;
    font-size: 2.52rem;
    font-weight: 700;
    font-family: inherit;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.checkout-order-btn:hover {
    background-color: var(--primary-dark);
}

.checkout-order-note {
    font-size: 1.68rem;
    color: var(--text-light);
    text-align: center;
    margin-top: 2.1rem;
    line-height: 1.6;
}

.checkout-order-note a {
    color: var(--accent-blue);
}

.checkout-order-note a:hover {
    text-decoration: underline;
}

/* ========================================
   注文完了カード
   ======================================== */
.checkout-complete-card {
    text-align: center;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 1.4rem;
    padding: 8.4rem 5.6rem;
    max-width: 80rem;
    margin: 0 auto;
}

.checkout-complete-icon {
    margin-bottom: 4.2rem;
    color: #28a745;
}

.checkout-complete-icon svg {
    width: 9.8rem;
    height: 9.8rem;
}

.checkout-complete-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 2.1rem;
}

.checkout-complete-message {
    font-size: 2.38rem;
    color: var(--text-light);
    margin-bottom: 5.6rem;
    line-height: 1.7;
}

.checkout-complete-info {
    background-color: var(--cream-bg);
    border: 0.18rem solid var(--border-color);
    border-radius: 1.05rem;
    padding: 3.5rem;
    margin-bottom: 5.6rem;
    text-align: left;
    display: inline-flex;
    flex-direction: column;
    gap: 1.75rem;
    min-width: 42rem;
}

.checkout-complete-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2.8rem;
}

.checkout-complete-info-label {
    font-size: 2.1rem;
    font-weight: 600;
    color: var(--text-light);
    flex-shrink: 0;
}

.checkout-complete-info-value {
    font-size: 2.1rem;
    font-weight: 600;
    color: var(--text-color);
}

.checkout-complete-info-price {
    font-size: 2.52rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.checkout-complete-actions {
    display: flex;
    justify-content: center;
    gap: 2.8rem;
    flex-wrap: wrap;
}

.checkout-complete-btn {
    display: inline-block;
    padding: 2.1rem 4.2rem;
    font-size: 2.38rem;
    font-weight: 600;
    border-radius: 1.05rem;
    transition: background-color 0.2s ease;
}

.checkout-complete-btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}

.checkout-complete-btn-primary:hover {
    background-color: var(--primary-dark);
    color: #fff;
}

.checkout-complete-btn-secondary {
    background-color: var(--bg-white);
    color: var(--text-color);
    border: 0.18rem solid var(--border-color);
}

.checkout-complete-btn-secondary:hover {
    background-color: var(--cream-bg);
    color: var(--text-color);
}

/* ========================================
   レスポンシブ - タブレット（768px以下）
   ======================================== */
@media (max-width: 768px) {
    .checkout-breadcrumb-inner {
        padding: 0 4.2rem;
    }

    .checkout-steps {
        padding: 4.2rem 0 2.8rem;
    }

    .checkout-steps-inner {
        padding: 0 4.2rem;
    }

    .checkout-step-number {
        width: 4.9rem;
        height: 4.9rem;
        font-size: 2.1rem;
    }

    .checkout-step-label {
        font-size: 1.82rem;
    }

    .checkout-step-line {
        margin: 0 1.4rem;
        margin-bottom: 3rem;
        min-width: 2.8rem;
    }

    .checkout-section-inner {
        padding: 0 4.2rem;
    }

    .checkout-title {
        font-size: 3.5rem;
    }

    /* 1カラムに切り替え */
    .checkout-content {
        grid-template-columns: 1fr;
        gap: 4.2rem;
    }

    .checkout-summary {
        position: static;
        order: -1;
    }

    .checkout-form-row-half {
        grid-template-columns: 1fr 1fr;
        gap: 2.1rem;
    }

    .checkout-form-group-short {
        max-width: 100%;
    }

    /* iOS自動ズーム防止 */
    .checkout-input,
    .checkout-select {
        font-size: 16px;
    }

    .checkout-complete-card {
        padding: 5.6rem 3.5rem;
    }

    .checkout-complete-info {
        min-width: auto;
        width: 100%;
    }
}

/* ========================================
   レスポンシブ - モバイル（480px以下）
   ======================================== */
@media (max-width: 480px) {
    .checkout-breadcrumb {
        padding: 2.1rem 0 0;
    }

    .checkout-breadcrumb-inner {
        padding: 0 2.8rem;
    }

    .checkout-breadcrumb-list {
        font-size: 1.82rem;
    }

    .checkout-steps {
        padding: 2.8rem 0 2.1rem;
    }

    .checkout-steps-inner {
        padding: 0 2.8rem;
    }

    .checkout-step-number {
        width: 4.2rem;
        height: 4.2rem;
        font-size: 1.82rem;
    }

    .checkout-step-label {
        font-size: 1.68rem;
    }

    .checkout-step-line {
        margin: 0 0.7rem;
        margin-bottom: 2.5rem;
        min-width: 2.1rem;
    }

    .checkout-section-inner {
        padding: 0 2.8rem;
    }

    .checkout-title {
        font-size: 3rem;
    }

    .checkout-form-section {
        padding: 2.8rem;
    }

    .checkout-form-heading {
        font-size: 2.38rem;
        margin-bottom: 2.8rem;
    }

    .checkout-form-heading-icon {
        width: 3.5rem;
        height: 3.5rem;
    }

    .checkout-form-heading-icon svg {
        width: 2.52rem;
        height: 2.52rem;
    }

    /* 2列 → 1列 */
    .checkout-form-row-half {
        grid-template-columns: 1fr;
        gap: 2.1rem;
    }

    .checkout-radio-card {
        padding: 2.1rem;
    }

    .checkout-credit-fields {
        padding: 2.1rem;
    }

    .checkout-summary {
        padding: 2.8rem;
    }

    .checkout-summary-title {
        font-size: 2.52rem;
    }

    .checkout-summary-total-price {
        font-size: 3rem;
    }

    .checkout-order-btn {
        font-size: 2.24rem;
        padding: 1.75rem;
    }

    .checkout-complete-card {
        padding: 4.2rem 2.8rem;
    }

    .checkout-complete-icon svg {
        width: 7rem;
        height: 7rem;
    }

    .checkout-complete-title {
        font-size: 2.8rem;
    }

    .checkout-complete-message {
        font-size: 2rem;
    }

    .checkout-complete-info {
        padding: 2.8rem;
        min-width: auto;
        width: 100%;
    }

    .checkout-complete-info-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }

    .checkout-complete-actions {
        flex-direction: column;
        align-items: center;
    }

    .checkout-complete-btn {
        width: 100%;
        text-align: center;
        font-size: 2.1rem;
    }
}