/* iOS 18 Liquid Glass Navbar - Mobile Only */
#navbar {
    position: fixed;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;

    display: flex;
    gap: 8px;
    padding: 8px 16px;

    /* iOS 18 Liquid Glass Effect */
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.10) 0%,
        rgba(255, 255, 255, 0.06) 100%
    );
    backdrop-filter: var(--blur-navbar);
    -webkit-backdrop-filter: var(--blur-navbar);

    border: 1px solid var(--glass-border);
    border-radius: 100px;

    box-shadow:
        var(--shadow-large),
        inset 0 2px 4px rgba(255, 255, 255, 0.12),
        inset 0 -2px 2px rgba(0, 0, 0, 0.08);

    transition: all var(--transition-base) var(--spring);
}

.nav-btn {
    min-width: 44px;
    height: 44px;
    padding: 0 16px;
    border: none;
    border-radius: 100px;
    cursor: pointer;
    transition: all var(--transition-fast);

    background: transparent;
    color: var(--text-secondary);

    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;

    font-size: 13px;
    font-weight: 500;
    position: relative;

    -webkit-tap-highlight-color: transparent;
}

.nav-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    fill: currentColor;
    transition: transform var(--transition-fast);
}

.nav-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-badge {
    position: absolute;
    top: -6px;
    right: -8px;
    min-width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #FF453A 0%, #FF6961 100%);
    border: 2px solid var(--bg-main);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: white;
    padding: 0 4px;
    box-shadow: 0 2px 8px rgba(255, 69, 58, 0.4);
}

.nav-label {
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}

/* Tactile feedback */
.nav-btn:active:not(.active) {
    background: var(--glass-light);
    color: var(--text-primary);
    transform: scale(0.95);
}

.nav-btn.active {
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.25) 0%,
        rgba(255, 255, 255, 0.15) 100%
    );
    color: white;

    border: 1px solid rgba(255, 255, 255, 0.3);

    box-shadow:
        0 4px 16px rgba(255, 255, 255, 0.15),
        inset 0 1px 2px rgba(255, 255, 255, 0.2),
        inset 0 -1px 1px rgba(0, 0, 0, 0.15);
}

.nav-btn.active svg {
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.3));
}

.nav-btn.active .nav-label {
    font-weight: 700;
}

/* NO RESPONSIVE - MOBILE ONLY APP */