/**
 * Bookmark Center Pro - Layout Structure
 * Main app layout and grid system
 * 
 * @package BookmarkCenterPro
 * @version 3.0.0
 */

/* ========================================
   Main App Layout
======================================== */
.bcp-layout {
    display: flex;
    width: 100%;
    height: 100%;
    min-height: 100vh;
    background: var(--bcp-bg);
    position: relative;
}

/* Background Effects */
.bcp-layout::before {
    content: '';
    position: fixed;
    top: 0;
    right: 0;
    width: 60%;
    height: 60%;
    background: radial-gradient(ellipse at 100% 0%, var(--bcp-primary-glow) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.bcp-layout::after {
    content: '';
    position: fixed;
    bottom: 0;
    left: 0;
    width: 50%;
    height: 50%;
    background: radial-gradient(ellipse at 0% 100%, var(--bcp-purple-glow) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ========================================
   Sidebar Container
======================================== */
.bcp-sidebar {
    width: var(--bcp-sidebar-width);
    height: 100vh;
    background: var(--bcp-bg-sidebar);
    border-left: 1px solid var(--bcp-border-subtle);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: relative;
    z-index: var(--bcp-z-sticky);
    transition: var(--bcp-transition-smooth);
}

/* Sidebar Collapsed State */
.bcp-sidebar.collapsed {
    width: var(--bcp-sidebar-collapsed);
}

.bcp-sidebar.collapsed .bcp-sidebar-label,
.bcp-sidebar.collapsed .bcp-sidebar-count,
.bcp-sidebar.collapsed .bcp-sidebar-section-title span,
.bcp-sidebar.collapsed .bcp-sidebar-search {
    display: none;
}

.bcp-sidebar.collapsed .bcp-sidebar-item {
    justify-content: center;
    padding: var(--bcp-space-3);
}

/* ========================================
   Main Content Area
======================================== */
.bcp-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100vh;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

/* ========================================
   Content Body (Scrollable)
======================================== */
.bcp-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--bcp-space-6);
}

/* Centered Content Container */
.bcp-content-inner {
    max-width: var(--bcp-max-content-width);
    margin: 0 auto;
    width: 100%;
}

/* ========================================
   Grid System
======================================== */
.bcp-grid {
    display: grid;
    gap: var(--bcp-space-4);
}

/* Bookmark Cards Grid - Responsive */
.bcp-grid-bookmarks {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--bcp-space-5);
}

/* Two Column Grid */
.bcp-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* Three Column Grid */
.bcp-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Four Column Grid */
.bcp-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Box Cards Grid (for folders/categories/tags display) */
.bcp-grid-boxes {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--bcp-space-4);
}

/* ========================================
   Flex Utilities
======================================== */
.bcp-flex {
    display: flex;
}

.bcp-flex-col {
    display: flex;
    flex-direction: column;
}

.bcp-flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.bcp-flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.bcp-flex-start {
    display: flex;
    align-items: flex-start;
}

.bcp-flex-end {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.bcp-flex-wrap {
    flex-wrap: wrap;
}

.bcp-flex-1 {
    flex: 1;
}

.bcp-flex-shrink-0 {
    flex-shrink: 0;
}

/* Gap Utilities */
.bcp-gap-1 { gap: var(--bcp-space-1); }
.bcp-gap-2 { gap: var(--bcp-space-2); }
.bcp-gap-3 { gap: var(--bcp-space-3); }
.bcp-gap-4 { gap: var(--bcp-space-4); }
.bcp-gap-5 { gap: var(--bcp-space-5); }
.bcp-gap-6 { gap: var(--bcp-space-6); }

/* ========================================
   Spacing Utilities
======================================== */
.bcp-p-0 { padding: 0; }
.bcp-p-2 { padding: var(--bcp-space-2); }
.bcp-p-3 { padding: var(--bcp-space-3); }
.bcp-p-4 { padding: var(--bcp-space-4); }
.bcp-p-5 { padding: var(--bcp-space-5); }
.bcp-p-6 { padding: var(--bcp-space-6); }

.bcp-px-4 { padding-left: var(--bcp-space-4); padding-right: var(--bcp-space-4); }
.bcp-py-4 { padding-top: var(--bcp-space-4); padding-bottom: var(--bcp-space-4); }

.bcp-m-0 { margin: 0; }
.bcp-mt-2 { margin-top: var(--bcp-space-2); }
.bcp-mt-4 { margin-top: var(--bcp-space-4); }
.bcp-mt-6 { margin-top: var(--bcp-space-6); }
.bcp-mb-2 { margin-bottom: var(--bcp-space-2); }
.bcp-mb-4 { margin-bottom: var(--bcp-space-4); }
.bcp-mb-6 { margin-bottom: var(--bcp-space-6); }

/* ========================================
   Card Base
======================================== */
.bcp-card {
    background: var(--bcp-bg-card);
    border: 1px solid var(--bcp-border-subtle);
    border-radius: var(--bcp-radius-lg);
    overflow: hidden;
    transition: var(--bcp-transition-normal);
}

.bcp-card-elevated {
    box-shadow: var(--bcp-shadow-md);
}

.bcp-card:hover {
    border-color: var(--bcp-border);
}

.bcp-card-interactive:hover {
    transform: translateY(-4px);
    box-shadow: var(--bcp-shadow-lg);
}

.bcp-card-header {
    padding: var(--bcp-space-4);
    border-bottom: 1px solid var(--bcp-border-subtle);
    background: var(--bcp-bg-elevated);
}

.bcp-card-body {
    padding: var(--bcp-space-4);
}

.bcp-card-footer {
    padding: var(--bcp-space-4);
    border-top: 1px solid var(--bcp-border-subtle);
    background: var(--bcp-bg-elevated);
}

/* ========================================
   Panel / Section
======================================== */
.bcp-panel {
    background: var(--bcp-bg-elevated);
    border: 1px solid var(--bcp-border-subtle);
    border-radius: var(--bcp-radius-lg);
    padding: var(--bcp-space-5);
}

.bcp-section {
    margin-bottom: var(--bcp-space-8);
}

.bcp-section-title {
    font-size: var(--bcp-text-lg);
    font-weight: 600;
    color: var(--bcp-text);
    margin-bottom: var(--bcp-space-4);
    display: flex;
    align-items: center;
    gap: var(--bcp-space-3);
}

.bcp-section-title svg {
    width: 24px;
    height: 24px;
    color: var(--bcp-primary);
}

/* ========================================
   Responsive Breakpoints
======================================== */
@media (max-width: 1400px) {
    .bcp-grid-bookmarks {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 1200px) {
    .bcp-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .bcp-grid-boxes {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

@media (max-width: 1024px) {
    .bcp-sidebar {
        position: fixed;
        right: 0;
        top: 0;
        height: 100vh;
        transform: translateX(100%);
        box-shadow: var(--bcp-shadow-xl);
        z-index: var(--bcp-z-fixed);
    }
    
    .bcp-sidebar.open {
        transform: translateX(0);
    }
    
    .bcp-main {
        width: 100%;
    }
    
    .bcp-content {
        padding: var(--bcp-space-4);
    }
}

@media (max-width: 768px) {
    .bcp-grid-3,
    .bcp-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .bcp-grid-bookmarks {
        grid-template-columns: 1fr;
    }
    
    .bcp-grid-boxes {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .bcp-content {
        padding: var(--bcp-space-3);
    }
}

@media (max-width: 480px) {
    .bcp-grid-2,
    .bcp-grid-3,
    .bcp-grid-4 {
        grid-template-columns: 1fr;
    }
    
    .bcp-grid-boxes {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Overlay for Mobile Sidebar
======================================== */
.bcp-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: calc(var(--bcp-z-fixed) - 1);
    opacity: 0;
    visibility: hidden;
    transition: var(--bcp-transition-normal);
}

.bcp-overlay.visible {
    opacity: 1;
    visibility: visible;
}