/* =========================================================
   ۱۹) لایه و مودال پرداخت (Payment Modal Layout)
   هدف: استایل بک‌دراپ، کادر مودال، هدر چسبان (sticky)، بدنه و فوتر
   وابستگی: به متغیرهای --pm-* که در بخش ۲ تعریف شده‌اند
   ========================================================= */
.payment-overlay {
    position: fixed;
    inset: 0;
    background: var(--pm-overlay-bg);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
}

    .payment-overlay.hidden {
        display: none !important;
    }

.payment-modal {
    width: 880px;
    max-width: 96vw;
    max-height: 92vh;
    overflow: auto;
    background: var(--pm-bg);
    border: 1px solid var(--pm-border);
    border-radius: 12px;
    color: var(--pm-text-main);
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
    direction: rtl;
    font-family: Tahoma, sans-serif;
}

.payment-modal-header {
    padding: 14px 16px;
    border-bottom: 1px solid var(--pm-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: var(--pm-header-bg);
    position: sticky;
    top: 0;
    z-index: 1;
}

.payment-modal-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--pm-title-color);
}

.payment-modal-close {
    background: none;
    border: none;
    color: var(--pm-text-soft);
    cursor: pointer;
    font-size: 22px;
    line-height: 1;
}

.payment-modal-body {
    padding: 14px 16px 18px 16px;
}

.pm-section {
    background: var(--pm-section-bg);
    border: 1px solid var(--pm-section-border);
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 12px;
}

.pm-section-title {
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--pm-text-main);
    font-size: 13px;
}

.pm-radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 10px;
}

.pm-radio {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--pm-text-main);
    cursor: pointer;
}

.pm-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
}

.pm-warning {
    margin-top: 8px;
    font-size: 11px;
    color: var(--pm-warning);
    line-height: 1.6;
}

.pm-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

@media (max-width: 700px) {
    .pm-grid {
        grid-template-columns: 1fr;
    }
}

.payment-modal-footer {
    padding: 12px 16px 16px 16px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.pm-btn {
    border: none;
    border-radius: 8px;
    cursor: pointer;
    padding: 10px 16px;
    font-weight: 700;
    font-size: 13px;
}

.pm-btn-primary {
    background: var(--pm-btn-primary-bg);
    color: #111;
}

.pm-btn-secondary {
    background: var(--pm-btn-secondary-bg);
    color: #fff;
}