/**
 * Loading Skeleton Styles
 * Provides smooth loading animations for better UX
 */

/* Skeleton base */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

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

/* Skeleton variants */
.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
    border-radius: 4px;
}

.skeleton-text.large {
    height: 24px;
}

.skeleton-text.small {
    height: 12px;
}

.skeleton-title {
    height: 32px;
    width: 60%;
    margin-bottom: 16px;
    border-radius: 6px;
}

.skeleton-card {
    height: 120px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.skeleton-stat {
    height: 100px;
    border-radius: 8px;
}

.skeleton-table-row {
    display: flex;
    gap: 16px;
    padding: 16px;
    border-bottom: 1px solid #f0f0f0;
}

.skeleton-table-cell {
    height: 20px;
    border-radius: 4px;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.skeleton-button {
    height: 40px;
    width: 120px;
    border-radius: 6px;
}

/* Pulse animation (alternative) */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.skeleton-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Shimmer effect */
.skeleton-shimmer {
    position: relative;
    overflow: hidden;
}

.skeleton-shimmer::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0,
        rgba(255, 255, 255, 0.3) 20%,
        rgba(255, 255, 255, 0.5) 60%,
        rgba(255, 255, 255, 0)
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    100% {
        transform: translateX(100%);
    }
}

/* Loading container */
.loading-container {
    padding: 20px;
}

/* Fade in when content loads */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

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

/* Skeleton grid layouts */
.skeleton-grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.skeleton-grid-5 {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .skeleton-grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Progress indicator */
.loading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: #e0e0f0;
    z-index: 9999;
    overflow: hidden;
}

.loading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #3B82F6, #2563EB, #3B82F6);
    background-size: 200% 100%;
    animation: progress 1.5s ease-in-out infinite;
}

@keyframes progress {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Spinner variations */
.spinner-ring {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(59, 130, 246, 0.1);
    border-top-color: #3B82F6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-dots {
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
}

.spinner-dot {
    width: 12px;
    height: 12px;
    background: #3B82F6;
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite;
}

.spinner-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.spinner-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

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