/* ==========================================================================
   Main Application Layout
   ========================================================================== */
.app-container {
    display: flex;
    height: 100vh;
    height: 100dvh;
}

/* Left Sidebar (Navigation) */
.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background-color: var(--color-background-primary);
    border-right: var(--border);
    padding: var(--spacing-sm);
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom));
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    overflow: hidden;
}

#main-nav {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background-color: var(--color-background-transparent70);
    z-index: 25;
}

.logo {
    font-size: 1.6rem;
    font-weight: var(--font-weight-bold);
    font-family: var(--font-family-heading);
    padding: 0 var(--spacing-xs);
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
    position: relative;
}

/* Home should use the full available width */
.main-content.is-home-page {
    align-items: stretch;
}

.main-content.is-home-page .page-content {
    max-width: none;
}

/* Header Banner - Flexbox properties moved from components.css for better layout control */
.header-banner {
    height: var(--header-height);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    border-bottom: var(--border);
    background-color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 10;
    gap: var(--spacing-md);
    width: 100%;
    transition: transform 0.22s ease, opacity 0.22s ease;
    will-change: transform;
}

.main-content.header-hidden .header-banner {
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
}

.main-content.header-hidden .page-content {
    margin-top: calc(-1 * var(--header-height));
}

.breadcrumbs {
    flex: 1 1 auto; /* Allow breadcrumbs to grow and shrink */
    min-width: 0; /* Crucial for allowing flex items to shrink below their content size */
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: visible;
    font-weight: var(--font-weight-medium);
}

.header-actions {
    flex-shrink: 0; /* Prevent header actions from shrinking */
    display: flex;
    flex-grow: 1;
    align-items: center;
    justify-content: right;
    gap: var(--spacing-sm);
}

@media (max-width: 900px) {
    .header-banner {
        padding: 0 var(--spacing-sm);
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-110%);
        transition: transform 0.2s ease;
        z-index: 30;
        width: min(var(--sidebar-width), 88vw);
        box-shadow: var(--shadow-md);
    }

    .app-container.sidebar-open .sidebar {
        transform: translateX(0);
    }
}