/* Loading States CSS */

/* Page Loader */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.page-loader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loader-text {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
}

/* Image Loading States */
img.loading {
    opacity: 0.3;
    filter: blur(5px);
    transition: opacity 0.3s ease, filter 0.3s ease;
}

img.loaded {
    opacity: 1;
    filter: blur(0);
}

img.error {
    opacity: 0.5;
    filter: grayscale(1);
}

.image-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.placeholder-spinner {
    width: 30px;
    height: 30px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.image-error {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    color: var(--danger-color);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 2;
}

/* Button Loading States */
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
    position: relative;
}

.btn.loading i.fa-spinner {
    animation: spin 1s linear infinite;
}

/* Inline Loader */
.inline-loader {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.inline-loader i {
    animation: spin 1s linear infinite;
}

/* Connection Warning */
.connection-warning {
    position: fixed;
    top: 80px;
    right: 20px;
    max-width: 350px;
    background: var(--warning-color);
    color: white;
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    z-index: 10000;
    animation: slideInRight 0.3s ease;
}

.warning-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.warning-content i.fa-wifi {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.warning-content p {
    flex: 1;
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.4;
}

.warning-content button {
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: background 0.2s ease;
    flex-shrink: 0;
}

.warning-content button:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Skeleton Loaders */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 0%,
        var(--bg-card) 50%,
        var(--bg-tertiary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

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

.skeleton-image {
    width: 100%;
    height: 200px;
    border-radius: var(--border-radius);
}

.skeleton-button {
    height: 40px;
    width: 120px;
    border-radius: var(--border-radius);
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Loading Overlay for Sections */
.section-loading {
    position: relative;
    pointer-events: none;
}

.section-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .connection-warning {
        top: 70px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .loader-spinner {
        width: 40px;
        height: 40px;
    }
    
    .loader-text {
        font-size: 0.875rem;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .loader-spinner,
    .placeholder-spinner,
    .inline-loader i {
        animation: none;
        border-top-color: var(--primary-color);
    }
    
    .skeleton {
        animation: none;
    }
}