/* Skeleton Loading Styles */

/* Base skeleton animation */
@keyframes skeleton-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes skeleton-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--card-bg, #1a1a2e) 25%,
        var(--skeleton-highlight, #2a2a4e) 50%,
        var(--card-bg, #1a1a2e) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
}

.skeleton-pulse {
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}

/* Skeleton elements */
.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
    border-radius: 4px;
}

.skeleton-text.short { width: 40%; }
.skeleton-text.medium { width: 70%; }
.skeleton-text.long { width: 100%; }

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: 1em;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-card {
    padding: 20px;
    border-radius: 10px;
    background: var(--card-bg, #1a1a2e);
}

.skeleton-stat {
    height: 60px;
    border-radius: 10px;
}

.skeleton-chart {
    height: 300px;
    border-radius: 10px;
}

.skeleton-table-row {
    display: flex;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color, #333);
}

.skeleton-table-cell {
    height: 20px;
    flex: 1;
}

/* Stats skeleton */
.skeleton-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 1024px) {
    .skeleton-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .skeleton-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color, #333);
    border-top-color: var(--primary-color, #00d9ff);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Lazy load fade in */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

.lazy-load.loaded {
    opacity: 1;
}

/* Content fade in */
.fade-in {
    animation: fadeIn 0.3s ease-in forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Chart loading placeholder */
.chart-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 200px;
    color: var(--text-secondary, #888);
}

.chart-loading-icon {
    font-size: 2em;
    margin-bottom: 10px;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}