.site-footer {
    grid-area: footer;
    width: 100%;
    max-width: 800px;
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) translateZ(0);
    z-index: 1000;
    background: var(--surface-color, #fff);
    border-top: 1px solid var(--border-color, #e0e0e0);
    height: 65px;
    display: grid;
    place-items: center;
    box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.08);
    will-change: transform;
    contain: layout style paint;
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
    max-width: 800px;
    place-items: center;
}

.nav-button {
    display: grid;
    place-items: center;
    color: var(--text-secondary, #666);
    font-size: 11px;
    font-weight: 500;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px 10px;
    transition: color 0.2s ease, background 0.2s ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
}

.nav-button svg {
    width: 26px;
    height: 26px;
    margin-bottom: 2px;
    transition: color 0.2s ease;
}

.nav-button:hover {
    color: var(--text-primary, #1a1a1a);
}

.nav-button.active {
    color: #0066cc;
    background: rgba(0, 102, 204, 0.1);
    border-radius: 8px;
}