.main-container {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    min-width: 0;
    padding: var(--space-xl);
    background-color: var(--colour-glass);
}

.filter-sidebar {
    width: 280px;
    min-width: 280px;
    background-color: #dbdddb;
    border-right: 1px solid var(--colour-border);
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: var(--z-sidebar);
    transition: transform var(--transition-base);
    scrollbar-width: thin;
    scrollbar-color: var(--colour-border) transparent;
}

.filter-sidebar::-webkit-scrollbar {
    width: 4px;
}

.filter-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.filter-sidebar::-webkit-scrollbar-thumb {
    background-color: var(--colour-border);
    border-radius: var(--radius-pill);
}

.sidebar-content {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.sidebar-logo {
    padding: 20px 0;
    border-bottom: 1px solid var(--colour-glass);
}

.sidebar-logo .logo {
    width: 220px;
    max-width: 90%;
    margin: 0 auto;
    display: block;
    border-radius: 8px;
    padding: 10px;
    background-color: var(--colour-white);
    box-shadow: var(--shadow-sm);
}

.sidebar-header {
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--colour-border);
    padding-bottom: var(--space-sm);
}

.sidebar-header h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: 0;
}

.sidebar-footer {
    font-size: var(--font-size-xs);
    border-top: 1px solid var(--colour-glass);
    padding-top: var(--space-md);
    margin-top: var(--space-lg);
}

.bg-sidebar {
    background-color: var(--colour-background);
    color: var(--colour-grey);
}

.sidebar-toggle {
    display: none;
    position: fixed;
    bottom: var(--space-xl);
    left: var(--space-md);
    z-index: var(--z-overlay);
    border: none;
    background: var(--colour-blue);
    color: var(--colour-white);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-md);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--colour-darkblue);
    transform: scale(1.05);
}

.close-sidebar {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--colour-text-muted);
    font-size: var(--font-size-lg);
    padding: var(--space-xs);
    line-height: 1;
    transition: color var(--transition-fast);
}

.close-sidebar:hover {
    color: var(--colour-text);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--colour-glass);
    z-index: calc(var(--z-sidebar) - 1);
}

.sidebar-overlay.active {
    display: block;
}

#scrollToTopBtn {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: var(--z-scroll-top);
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-pill);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base);
    transform: translateY(8px);
}

#scrollToTopBtn.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

@media (max-width: 992px) {
    .filter-sidebar {
        width: 260px;
        min-width: 260px;
    }
}

@media (max-width: 768px) {

    body {
        overflow-x: hidden;
    }

    body.touch-scroll-disabled {
        overflow: hidden;
    }

    .main-container {
        display: block;
    }

    .main-content {
        width: 100%;
        padding: var(--space-md);
    }

    .filter-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        width: 280px;
        transform: translateX(-100%);
        box-shadow: none;
        z-index: var(--z-sidebar);
    }

    .filter-sidebar.show-sidebar {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    .sidebar-toggle {
        display: flex;
    }

    .sidebar-logo {
        padding: 10px 0;
    }

    .sidebar-logo .logo {
        width: 180px;
    }
}