/* Layout Styles */

/* ==================== App Container ==================== */
.app {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ==================== Sidebar ==================== */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.sidebar-logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary);
}

.sidebar-subtitle {
    font-size: var(--font-size-xs);
    color: var(--text-hint);
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--primary-bg);
    color: var(--primary);
}

.nav-item-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.nav-item-badge {
    margin-left: auto;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
}

.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

/* ==================== Main Content ==================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-main);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: 4px;
}

.page-body {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.page-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

/* ==================== Split Layout ==================== */
.split-layout {
    display: flex;
    gap: var(--spacing-lg);
    height: 100%;
}

.split-left {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.split-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-width: 0;
    min-height: 400px;
    overflow-y: auto;
}

.split-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* Resizable Splitter */
.splitter {
    width: 4px;
    background: var(--border-color);
    cursor: col-resize;
    transition: background var(--transition-fast);
}

.splitter:hover {
    background: var(--primary);
}

/* ==================== Grid Layout ==================== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

/* ==================== Editor Layout ==================== */
.editor-layout {
    display: flex;
    gap: var(--spacing-lg);
    height: 100%;
}

.editor-input,
.editor-output {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.editor-content {
    flex: 1;
    min-height: 0;
}

.editor-content textarea {
    height: 100%;
    resize: none;
}

.editor-footer {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* ==================== Quick Actions Bar ==================== */
.quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-hover);
    border-radius: var(--radius-md);
}

/* ==================== Status Bar ==================== */
.status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.status-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
}

.status-indicator.warning {
    background: var(--warning);
}

.status-indicator.error {
    background: var(--danger);
}

.status-indicator.loading {
    background: var(--primary);
    animation: pulse 1s ease-in-out infinite;
}

/* Page animations */
.page {
    display: none;
}

.page.active {
    display: flex;
    flex-direction: column;
    height: 100%;
    animation: fadeIn var(--transition-base);
}

/* ==================== Mobile Responsive Styles (Max 768px) ==================== */
@media (max-width: 768px) {
    /* Main Layout Framework: sidebar shifts to bottom tab bar */
    .app {
        flex-direction: column-reverse !important;
    }
    
    .sidebar {
        width: 100% !important;
        height: 60px !important;
        flex-direction: row !important;
        border-right: none !important;
        border-top: 1px solid var(--border-color);
        justify-content: space-around;
        align-items: center;
        padding: 0 !important;
        z-index: 100;
    }

    .sidebar-header,
    .sidebar-footer,
    .sidebar-subtitle {
        display: none !important;
    }

    .sidebar-nav {
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-around !important;
        align-items: center !important;
        width: 100% !important;
        height: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
        overflow-y: visible !important;
    }

    .nav-item {
        margin-bottom: 0 !important;
        flex-direction: column !important;
        font-size: 10px !important;
        gap: 2px !important;
        padding: 6px 12px !important;
        justify-content: center;
        align-items: center;
        flex: 1;
        height: 100%;
        position: relative;
    }

    .nav-item-icon {
        font-size: 18px !important;
    }

    .nav-item-badge {
        position: absolute;
        top: 2px;
        right: 15px;
        margin-left: 0 !important;
        font-size: 9px !important;
        padding: 1px 5px !important;
    }

    /* Page Header Adjustment */
    .page-header {
        padding: var(--spacing-md) var(--spacing-md) !important;
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .page-title {
        font-size: var(--font-size-lg) !important;
    }

    .page-subtitle {
        display: none !important;
    }

    /* Page Body Padding */
    .page-body {
        padding: var(--spacing-md) !important;
        -webkit-overflow-scrolling: touch;
    }

    /* Split Columns Collapse */
    .split-layout {
        flex-direction: column !important;
        gap: var(--spacing-md) !important;
        height: auto !important;
        overflow-y: visible !important;
    }

    .split-left {
        width: 100% !important;
        height: auto !important;
        border-right: none !important;
    }

    .split-right {
        min-height: 250px !important;
        height: auto !important;
        overflow-y: visible !important;
    }

    /* Editor Columns Collapse */
    .editor-layout {
        flex-direction: column !important;
        gap: var(--spacing-md) !important;
        height: auto !important;
    }

    .editor-input,
    .editor-output {
        height: 320px !important;
    }

    /* Grid layout auto-responsive */
    .grid-2, .grid-3 {
        grid-template-columns: 1fr !important;
        gap: var(--spacing-md) !important;
    }
}