/* ========== شريط التنقل السفلي ========== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 480px;
    display: flex;
    justify-content: space-around;
    background: var(--nav-bg);
    backdrop-filter: blur(24px);
    border-top: 1.5px solid var(--border);
    padding: 8px 0 16px;
    z-index: 100;
}
.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s;
    padding: 6px 16px;
}
.nav-item.active { color: var(--primary); }

.nav-icon-wrap {
    width: 36px; height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.nav-item.active .nav-icon-wrap {
    background: var(--primary-glow);
}

/* ========== كاميرا QR داخل الإطار ========== */
#qrScannerFrame { position: relative; overflow: hidden; }