/* ===== mobile-tabbar.css ===== */
.mobile-tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--layout-footer-height);
    background-color: var(--color-header-bg);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 100;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -2px 10px var(--color-shadow);
    transition: background-color var(--animation-speed-normal) ease;
    padding: var(--spacing-sm) 0;
    will-change: transform;
}
@media (min-width: 769px) {
    .mobile-tabbar {
        display: none;
    }
}
.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 20%;
    height: 100%;
    cursor: pointer;
    transition: color var(--animation-speed-fast);
    color: var(--color-muted);
    font-size: var(--font-size-xs);
    position: relative;
    touch-action: manipulation;
    padding: var(--spacing-xs) 0;
    border-radius: var(--radius-lg);
    flex: 1;
}
.tab-item.active {
    color: var(--color-primary);
    background: rgba(26, 86, 219, 0.05);
}
.tab-item i {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
    transition: color var(--animation-speed-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: transparent;
}
.tab-item.active i {
    color: var(--color-primary);
    background: rgba(26, 86, 219, 0.1);
}
.tab-item:hover {
    color: var(--color-primary);
}
.tab-item.active::after {
    content: '';
    position: absolute;
    top: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 1.5px;
}