.bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 20px;
    height: 56px;
    background: #34495e;
    border-top: 1px solid #2c3e50;
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.08);
    margin: 0 12px;
    border-radius: 16px;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #b7c5d3;
    font-size: 13px;
    font-family: 'Segoe UI', Arial, Helvetica, sans-serif;
    font-weight: 500;
    letter-spacing: 0.01em;
    justify-content: center;
    height: 56px;
    transition: background 0.15s, color 0.15s;
    border-radius: 10px;
    margin: 0 2px;
    box-sizing: border-box;
    position: relative;
}

.nav-item img {
    width: 32px;
    height: 32px;
    margin-bottom: 2px;
    display: block;
    filter: grayscale(0) brightness(1.3) opacity(0.85);
    transition: filter 0.15s, transform 0.15s;
}

.nav-item.active {
    color: #1de9b6;
    background: rgba(29,233,182,0.08);
}

.nav-item.active img {
    filter: none;
    transform: scale(1.05);
}

.nav-item:hover {
    color: #1de9b6;
    background: rgba(29,233,182,0.04);
}

.nav-item:hover img {
    filter: none;
}

.nav-item span {
    font-size: 13px;
    font-family: inherit;
    font-weight: 500;
    line-height: 1;
    margin-top: 0;
    letter-spacing: 0.01em;
    color: inherit;
}

@media (max-width: 600px) {
    .bottom-nav {
        bottom: 16px;
        margin: 0 8px;
        height: 52px;
    }
    .nav-item img {
        width: 26px;
        height: 26px;
    }
    .nav-item {
        font-size: 11px;
        height: 52px;
    }
}
.balance-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}