/* ===== پوسته‌ی مشترک صفحات فروشگاه (خانه، جزئیات محصول، سبد، تسویه‌حساب، نتیجه پرداخت) ===== */

.page-bg {
    min-height: 100vh;
    background: #eef0f4;
    display: flex;
    justify-content: center;
}

.shop-shell {
    width: 100%;
    max-width: 430px;
    min-height: 100vh;
    background: #fff;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 24px rgba(0,0,0,.08);
}

/* تبلت */
@media (min-width: 768px) {
    .shop-shell { max-width: 700px; }
    .shop-topbar { padding: 24px 32px 12px; }
    .shop-scroll { padding: 8px 32px 90px; }
    .shop-title { font-size: 24px; }
}

/* دسکتاپ/مانیتور */
@media (min-width: 1200px) {
    .shop-shell { max-width: 1100px; }
    .shop-topbar { padding: 28px 48px 16px; }
    .shop-scroll { padding: 8px 48px 100px; }
}

.shop-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 16px 8px;
}

.shop-title {
    font-size: 20px;
    font-weight: 700;
    margin: 0;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: none;
    background: #f3f4f8;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #1e1b4b;
    flex-shrink: 0;
}

.shop-scroll {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 8px 16px 90px;
}

.shop-bottomnav {
    position: sticky;
    bottom: 0;
    background: #1e1b4b;
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 14px 0;
    border-radius: 20px 20px 0 0;
}

.nav-item {
    color: #9a97c4;
    font-size: 20px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-active { color: #fff; }

.nav-bell { position: relative; }

.nav-badge {
    position: absolute;
    top: -6px;
    left: -8px;
    background: #ff7a3d;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    min-width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== دکمه‌ی ثابت پایین صفحه (خرید/تسویه‌حساب) ===== */
.sticky-cta {
    position: sticky;
    bottom: 0;
    background: #fff;
    border-top: 1px solid #eee;
    padding: 12px 16px;
    box-shadow: 0 -4px 16px rgba(0,0,0,.05);
}