/* ============================================================
   ショップ タブ (どうぐ / けん / たて / うる)
   ============================================================ */
.shop-tabs {
    display: flex;
    gap: 10px;
}

.shop-tab {
    flex: 1;
    font-family: var(--font-pixel);
    font-size: 28px;
    padding: 10px 0;
    background: rgba(30, 40, 80, 1);
    border: 2px solid rgba(55, 80, 155, 0.8);
    border-radius: 10px;
    color: #a0aabf;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.shop-tab.active {
    background: rgba(20, 60, 120, 1);
    border-color: var(--primary-color);
    color: #4facfe;
}

#app.portrait-mode .shop-tab {
    font-size: 30px;
    padding: 14px 0;
}

/* ============================================================
   ショップ アイテム詳細オーバーレイ
   ============================================================ */
.shop-item-content {
    background: linear-gradient(145deg, #181f3c 0%, #0d1222 100%);
    border: 4px solid var(--accent-color);
    border-radius: 20px;
    padding: 30px 40px;
    width: 400px;
    max-width: 90%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    box-shadow: 0 0 44px rgba(255, 215, 0, 0.45), 0 12px 40px rgba(0, 0, 0, 0.75), inset 0 1px 0 rgba(255, 240, 100, 0.08);
}

.shop-item-detail-img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    filter: drop-shadow(0 0 6px rgba(255, 215, 0, 1)) drop-shadow(0 0 12px rgba(255, 215, 0, 0.7));
}

.shop-item-detail-name {
    font-family: var(--font-pixel);
    font-size: 36px;
    color: var(--accent-color);
    margin: 0;
}

.shop-item-detail-desc {
    font-size: 24px;
    color: #e2e8f0;
    text-align: center;
}

.shop-item-detail-price {
    font-family: var(--font-pixel);
    font-size: 35px;
    color: var(--success-color);
}

.shop-buy-question {
    font-family: var(--font-pixel);
    font-size: 32px;
    color: #fff;
    margin: 4px 0 0;
}

.shop-buy-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 4px;
}

.shop-buy-buttons button {
    font-size: 32px;
    padding: 14px 40px;
    min-width: 120px;
}

/* ショップ エラーメッセージ オーバーレイ（アイテム詳細より前面） */
.shop-msg-overlay {
    z-index: 105;
}

.shop-msg-text {
    font-family: var(--font-pixel);
    font-size: 36px;
    color: #4facfe;
    text-align: center;
    line-height: 1.6;
    white-space: pre-line;
}

.shop-msg-overlay .overlay-content {
    background: linear-gradient(180deg, rgba(22, 30, 58, 0.97) 0%, rgba(10, 14, 32, 0.98) 100%);
    border: 3px solid #4facfe;
    border-radius: 20px;
    padding: 40px 50px;
    box-shadow: 0 0 30px rgba(79, 172, 254, 0.45), 0 12px 40px rgba(0, 0, 0, 0.75);
}

.shop-msg-overlay #shop-msg-close-btn {
    font-size: 32px;
    padding: 14px 50px;
    margin: 0 auto;
}