:root {
    --sidebar-width: 250px;
    --sidebar-bg: #fff;
    --sidebar-text: #1a1a1a;
    --sidebar-border: #f0f0f0;
    --bottom-nav-height: 60px;
}

.bottom-nav-container {
    display: none;
}

.app-layout-container {
    display: flex;
    position: relative;
    padding-top: 20px;
}

.sidebar-container {
    width: var(--sidebar-width);
    position: sticky;
    top: 100px;
    height: calc(100vh - 100px);
    border-right: 1px solid var(--sidebar-border);
    padding: 20px;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-container {
    display: flex;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    margin-bottom: 10px;
    text-decoration: none;
    color: #888;
    font-family: 'Source Serif Pro', serif;
    font-size: 1.1em;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar-nav-item:hover {
    background: #f9f9f9;
    color: #1a1a1a;
    transform: translateX(5px);
}

.sidebar-nav-item.active {
    color: #1a1a1a;
    font-weight: 700;
    background: #f5f5f5;
    border-left: 3px solid #1a1a1a;
}

.nav-icon {
    width: 24px;
    height: 24px;
    margin-right: 15px;
    fill: currentColor;
    transition: fill 0.3s ease;
}

.page-content-standard {
    max-width: 600px !important;
    width: 100% !important;
    margin: 0 auto !important;
    padding: 0 !important;
    box-sizing: border-box !important;
}

.feed-content-wrapper {
    flex: 1;
    padding-left: 40px;
    padding-right: 20px;
}


@media screen and (max-width: 768px) {

    .app-layout-container {
        display: block;
        padding-top: 0;
    }

    .sidebar-container {
        display: none;
    }

    .feed-content-wrapper {
        padding: 0 20px;
        margin-bottom: 70px;
        max-width: 100%;
    }

    .bottom-nav-container {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: var(--bottom-nav-height);
        background: rgba(255, 255, 255, 0.98);
        border-top: 1px solid #eee;
        display: flex;
        justify-content: space-around;
        align-items: center;
        z-index: 2000;
        backdrop-filter: blur(10px);
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.03);
    }

    .bottom-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        color: #999;
        flex: 1;
        height: 100%;
    }

    .bottom-nav-item.active {
        color: #1a1a1a;
    }

    .bottom-nav-item .nav-icon {
        margin-right: 0;
        width: 24px;
        height: 24px;
    }

    .bottom-nav-item.active::after {
        content: '';
        width: 4px;
        height: 4px;
        background: #1a1a1a;
        border-radius: 50%;
        margin-top: 4px;
    }
}