/* ===============================================
   UNIFIED GRID COMPONENT SYSTEM
   ===============================================
   
   A single, reusable grid system that handles:
   - Responsive auto-fit grids (metrics, cards)
   - Fixed column data grids (tables)
   - Timeline grids (schedules)
   - Matrix grids (dynamic properties)
   - Horizontal scrolling with indicators
   
   Usage:
   <div class="unified-grid" data-grid-type="auto-fit" data-min-col-width="240px">
       <!-- content -->
   </div>
*/

/* ===================================
   BASE UNIFIED GRID
   =================================== */

.unified-grid {
    display: grid;
    gap: var(--space-md);
    width: 100%;
    position: relative;
}

/* ===================================
   GRID TYPE: AUTO-FIT (Responsive)
   =================================== */

/* Default: Metric cards, KPI grids */
.unified-grid[data-grid-type="auto-fit"] {
    grid-template-columns: repeat(auto-fit, minmax(var(--min-col-width, 240px), 1fr));
}

/* Preset column widths for common use cases */
.unified-grid[data-grid-cols="2"] {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.unified-grid[data-grid-cols="3"] {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.unified-grid[data-grid-cols="4"] {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.unified-grid[data-grid-cols="5"] {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

/* ===================================
   GRID TYPE: FIXED COLUMNS
   =================================== */

.unified-grid[data-grid-type="fixed"] {
    grid-template-columns: var(--grid-columns);
}

/* Common fixed patterns */
.unified-grid[data-grid-pattern="data-4"] {
    grid-template-columns: 2fr 1fr 1fr 1fr;
}

.unified-grid[data-grid-pattern="data-5"] {
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
}

.unified-grid[data-grid-pattern="equal-2"] {
    grid-template-columns: 1fr 1fr;
}

.unified-grid[data-grid-pattern="equal-3"] {
    grid-template-columns: 1fr 1fr 1fr;
}

.unified-grid[data-grid-pattern="equal-4"] {
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

/* ===================================
   GRID TYPE: TIMELINE (Horizontal Scroll)
   =================================== */

.unified-grid[data-grid-type="timeline"] {
    grid-template-columns: var(--grid-columns, 120px repeat(11, minmax(80px, 1fr)));
    gap: 1px;
    background: var(--border-light);
    overflow-x: auto;
    overflow-y: visible;
    scrollbar-width: none;
    -ms-overflow-style: none;
    min-width: 100%;
}

.unified-grid[data-grid-type="timeline"]::-webkit-scrollbar {
    display: none;
}

/* Timeline cells */
.unified-grid[data-grid-type="timeline"] > * {
    background: var(--bg-white);
}

/* ===================================
   GRID TYPE: MATRIX (Dynamic Horizontal)
   =================================== */

.unified-grid[data-grid-type="matrix"] {
    display: grid;
    gap: 0;
    min-width: max-content;
    grid-template-columns: var(--grid-columns);
}

/* Matrix wrapper for scroll */
.unified-grid-wrapper {
    position: relative;
    overflow-x: auto;
    overflow-y: visible;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.unified-grid-wrapper::-webkit-scrollbar {
    display: none;
}

/* Matrix header cells */
.unified-grid[data-grid-type="matrix"] .grid-header-cell {
    background: var(--bg-secondary);
    padding: var(--space-sm) var(--space-md);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    border-bottom: 2px solid var(--border-medium);
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1;
}

/* Matrix data cells */
.unified-grid[data-grid-type="matrix"] .grid-cell {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    text-align: center;
    background: var(--bg-white);
    transition: all 0.2s var(--ease-out);
}

/* Row headers (first column) */
.unified-grid[data-grid-type="matrix"] .row-header {
    text-align: left;
    font-weight: 600;
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.unified-grid[data-grid-type="matrix"] .grid-cell.interactive {
    cursor: pointer;
}

.unified-grid[data-grid-type="matrix"] .grid-cell.interactive:hover {
    background: var(--bg-primary-50);
    transform: scale(1.02);
    z-index: 2;
    box-shadow: var(--shadow-sm);
}

/* ===================================
   HORIZONTAL SCROLL MANAGEMENT
   =================================== */

/* Any grid can opt-in to horizontal scroll */
.unified-grid[data-scroll="horizontal"],
.unified-grid-wrapper {
    position: relative;
    overflow-x: auto;
    overflow-y: visible;
    scroll-behavior: smooth;
}

/* Modern, visible scrollbar styling with breathing room */
.unified-grid[data-scroll="horizontal"],
.unified-grid-wrapper,
.matrix-container,
.team-timeline-grid,
.timeline-scroll-container {
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.3) rgba(0, 0, 0, 0.05);
    padding-bottom: 12px; /* Gap between content and scrollbar */
}

/* WebKit scrollbar styling */
.unified-grid[data-scroll="horizontal"]::-webkit-scrollbar,
.unified-grid-wrapper::-webkit-scrollbar,
.matrix-container::-webkit-scrollbar,
.team-timeline-grid::-webkit-scrollbar,
.timeline-scroll-container::-webkit-scrollbar {
    height: 8px;
    display: block;
}

.unified-grid[data-scroll="horizontal"]::-webkit-scrollbar-track,
.unified-grid-wrapper::-webkit-scrollbar-track,
.matrix-container::-webkit-scrollbar-track,
.team-timeline-grid::-webkit-scrollbar-track,
.timeline-scroll-container::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}

.unified-grid[data-scroll="horizontal"]::-webkit-scrollbar-thumb,
.unified-grid-wrapper::-webkit-scrollbar-thumb,
.matrix-container::-webkit-scrollbar-thumb,
.team-timeline-grid::-webkit-scrollbar-thumb,
.timeline-scroll-container::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
}

.unified-grid[data-scroll="horizontal"]::-webkit-scrollbar-thumb:hover,
.unified-grid-wrapper::-webkit-scrollbar-thumb:hover,
.matrix-container::-webkit-scrollbar-thumb:hover,
.team-timeline-grid::-webkit-scrollbar-thumb:hover,
.timeline-scroll-container::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.5);
}

/* ===================================
   GAP VARIATIONS
   =================================== */

.unified-grid[data-gap="none"] {
    gap: 0;
}

.unified-grid[data-gap="xs"] {
    gap: var(--space-xs);
}

.unified-grid[data-gap="sm"] {
    gap: var(--space-sm);
}

.unified-grid[data-gap="md"] {
    gap: var(--space-md);
}

.unified-grid[data-gap="lg"] {
    gap: var(--space-lg);
}

.unified-grid[data-gap="xl"] {
    gap: var(--space-xl);
}

/* ===================================
   TIMELINE-SPECIFIC ENHANCEMENTS
   =================================== */

/* Timeline header row */
.unified-grid[data-grid-type="timeline"] .timeline-header-cell {
    background: var(--bg-white);
    padding: var(--space-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
    border-right: 1px solid var(--border-light);
    white-space: nowrap;
}

.unified-grid[data-grid-type="timeline"] .timeline-label-cell {
    background: var(--bg-white);
    padding: var(--space-sm);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    border-right: 1px solid var(--border-light);
}

/* Timeline data cells */
.unified-grid[data-grid-type="timeline"] .timeline-cell {
    background: var(--bg-white);
    border-right: 1px solid var(--border-light);
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.unified-grid[data-grid-type="timeline"] .timeline-cell.empty {
    background: var(--bg-gray-25);
    transition: background-color 0.2s ease;
}

.unified-grid[data-grid-type="timeline"] .timeline-cell.empty:hover {
    background: var(--bg-primary-50);
    cursor: pointer;
}

/* ===================================
   RESPONSIVE ADJUSTMENTS
   =================================== */

@media (max-width: 1200px) {
    .unified-grid[data-grid-type="timeline"] {
        grid-template-columns: var(--grid-columns-md, 100px repeat(11, minmax(60px, 1fr)));
    }
    
    .unified-grid[data-grid-cols="2"],
    .unified-grid[data-grid-cols="3"],
    .unified-grid[data-grid-cols="4"],
    .unified-grid[data-grid-cols="5"] {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

@media (max-width: 1024px) {
    .unified-grid[data-grid-type="timeline"] {
        grid-template-columns: var(--grid-columns-sm, 100px repeat(11, minmax(60px, 1fr)));
    }
}

@media (max-width: 768px) {
    .unified-grid[data-grid-cols="2"],
    .unified-grid[data-grid-cols="3"],
    .unified-grid[data-grid-cols="4"],
    .unified-grid[data-grid-cols="5"] {
        grid-template-columns: 1fr;
    }
    
    .unified-grid[data-grid-type="auto-fit"] {
        grid-template-columns: 1fr;
    }
    
    .unified-grid[data-grid-pattern="data-4"],
    .unified-grid[data-grid-pattern="data-5"] {
        grid-template-columns: 1fr;
    }
    
    .grid-scroll-indicator {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
    
    .grid-scroll-indicator-left {
        left: 8px;
    }
    
    .grid-scroll-indicator-right {
        right: 8px;
    }
}

@media (max-width: 480px) {
    .unified-grid[data-grid-type="timeline"] {
        grid-template-columns: var(--grid-columns-xs, 80px repeat(11, minmax(40px, 1fr)));
    }
}

/* ===================================
   ACCESSIBILITY
   =================================== */

@media (prefers-reduced-motion: reduce) {
    .unified-grid[data-scroll="horizontal"],
    .unified-grid-wrapper {
        scroll-behavior: auto;
    }
    
    .grid-scroll-indicator {
        transition: opacity 0.1s ease;
    }
}

.grid-scroll-indicator:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===================================
   LEGACY COMPATIBILITY
   =================================== */

/* Automatically apply unified-grid-wrapper to old matrix-container */
.matrix-container {
    position: relative;
    overflow-x: auto;
    overflow-y: visible;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.matrix-container::-webkit-scrollbar {
    display: none;
}

/* Keep existing matrix-grid working */
.matrix-grid {
    display: grid;
    gap: 0;
    min-width: max-content;
}