/* Standard Fixed Layout Strategy */
:root {
    --sidebar-width: 260px;
}

#app {
    min-height: 100vh;
    background-color: var(--bg-app);
}

.app-shell {
    display: block;
    position: relative;
    min-height: 100vh;
    overflow-x: hidden;
    /* Prevent horizontal scroll from animations */
}

/* Sidebar - Fixed on Left */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 1050;
    /* High index to sit above everything */
    transform: translateX(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    cursor: pointer;
    font-weight: 500;
    text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-left: 3px solid var(--accent-primary);
    padding-left: calc(var(--space-md) - 3px);
}

/* Main Content - Pushed by Margin */
.main-content {
    margin-left: var(--sidebar-width);
    /* Pushes content right */
    padding: var(--space-xl);
    width: auto;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
    box-sizing: border-box;
}

.header {
    margin-bottom: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: nowrap;
    gap: var(--space-md);
    min-height: 48px;
}

.header h2 {
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 1.5rem;
}

.status-indicator {
    white-space: nowrap;
    font-size: 0.8rem;
    text-align: right;
    flex-shrink: 0;
}

/* Grids - Responsive */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
}

/* Mobile Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.75rem;
    cursor: pointer;
    padding: 0;
    margin-right: var(--space-md);
}

/* Responsive / Mobile */
@media (max-width: 1024px) {

    /* Hide sidebar by default on mobile */
    .sidebar {
        transform: translateX(-100%);
    }

    /* Slide in when open */
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 5px 0 30px rgba(0, 0, 0, 0.6);
    }

    /* Reset content margin */
    .main-content {
        margin-left: 0;
        padding: var(--space-md);
    }

    .mobile-menu-toggle {
        display: block;
    }

    .header {
        justify-content: flex-start;
    }

    /* Backdrop */
    .menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.7);
        backdrop-filter: blur(2px);
        z-index: 1000;
        display: none;
    }

    .menu-overlay.open {
        display: block;
    }
}