/**
 * pjax-skeleton.css — Glassmorphic Skeleton Loader Styles
 * Shimmer animations for PJAX content swaps.
 * v1.0 — Rezder Dashboard
 */

/* ═══════════════════════════════════════════════════════════════
   SKELETON BASE
   ═══════════════════════════════════════════════════════════════ */

.pjax-skeleton {
    padding: 0 4px;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow: hidden;
    animation: pjax-skeleton-fade-in 0.15s ease-out;
}

@keyframes pjax-skeleton-fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════════════════
   SHIMMER ANIMATION
   ═══════════════════════════════════════════════════════════════ */

.skel-line,
.skel-card,
.skel-card.tall,
.skel-card.xl {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.skel-line::after,
.skel-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.04) 40%,
        rgba(255, 255, 255, 0.08) 50%,
        rgba(255, 255, 255, 0.04) 60%,
        transparent 100%
    );
    animation: pjax-shimmer 1.8s ease-in-out infinite;
}

@keyframes pjax-shimmer {
    0% { left: -100%; }
    100% { left: 200%; }
}

/* ═══════════════════════════════════════════════════════════════
   SKELETON ELEMENTS
   ═══════════════════════════════════════════════════════════════ */

.skel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-shrink: 0;
    padding: 4px 0;
}

.skel-line {
    height: 14px;
    border-radius: 7px;
}

.skel-line.w-24 { width: 96px; }
.skel-line.w-28 { width: 112px; }
.skel-line.w-32 { width: 128px; }
.skel-line.w-36 { width: 144px; }
.skel-line.w-40 { width: 160px; }
.skel-line.w-44 { width: 176px; }
.skel-line.w-48 { width: 192px; }
.skel-line.w-full { width: 100%; margin-bottom: 8px; }

.skel-card {
    height: 80px;
    border-radius: 12px;
    margin-bottom: 8px;
}

.skel-card.tall {
    height: 140px;
}

.skel-card.xl {
    height: 320px;
    flex: 1;
}

/* ═══════════════════════════════════════════════════════════════
   LAYOUT COMPOSITIONS
   ═══════════════════════════════════════════════════════════════ */

/* Kanban skeleton — 5 columns */
.skel-kanban {
    display: flex;
    gap: 12px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.skel-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
}

.skel-column .skel-card {
    height: 72px;
}

/* 3-column grid skeleton */
.skel-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.skel-grid-3 .skel-card {
    height: 100px;
}

.skel-grid-3 .skel-card.tall {
    height: 160px;
}

/* Split layout — left panel + right panel */
.skel-split {
    display: flex;
    gap: 16px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.skel-panel-left {
    width: 360px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skel-panel-left.narrow {
    width: 220px;
}

.skel-panel-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Chip grid skeleton — for filter pills */
.skel-grid-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 0;
}

.skel-grid-chips::before,
.skel-grid-chips::after {
    content: '';
    height: 28px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.skel-grid-chips::before { width: 80px; }
.skel-grid-chips::after { width: 60px; }

/* Utility */
.mt-6 { margin-top: 24px; }

/* ═══════════════════════════════════════════════════════════════
   PJAX CONTENT TRANSITION
   ═══════════════════════════════════════════════════════════════ */

#pjaxContent {
    will-change: opacity, transform;
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .skel-kanban {
        overflow-x: auto;
    }
    .skel-column {
        min-width: 180px;
    }
    .skel-split {
        flex-direction: column;
    }
    .skel-panel-left,
    .skel-panel-left.narrow {
        width: 100%;
    }
    .skel-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}