`public/css/adaptive-loading.css`

280 lines
/**
 * Adaptive Loading Styles
 * Styles for loading indicators and connection notifications
 */

/* Loading Indicator */
.adaptive-loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    z-index: 10;
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.adaptive-loading-indicator .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #2c5f8d;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.adaptive-loading-indicator span {
    font-size: 14px;
    color: #2c3e50;
    font-weight: 500;
}

/* Loading State for Images */
.adaptive-loading {
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.adaptive-loaded {
    opacity: 1;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.adaptive-error {
    opacity: 0.3;
    filter: grayscale(100%);
}

/* Video Placeholder */
.video-placeholder {
    width: 100%;
    height: 100%;
    min-height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    position: relative;
}

.video-placeholder-content {
    text-align: center;
    color: white;
    padding: 30px;
}

.video-placeholder-content i {
    font-size: 48px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.video-placeholder-content p {
    font-size: 16px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.video-enable-btn {
    background: white;
    color: #667eea;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.video-enable-btn:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Connection Notification */
.connection-notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background: white;
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    animation: slideIn 0.3s ease;
}

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

.connection-notification.fade-out {
    animation: slideOut 0.3s ease;
}

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

.connection-notification i {
    font-size: 20px;
    color: #2c5f8d;
}

.connection-notification span {
    font-size: 14px;
    color: #2c3e50;
    font-weight: 500;
}

/* Adaptive Video Enabled State */
.adaptive-video-enabled {
    border: 2px solid #2c5f8d;
    border-radius: 10px;
}

/* Loading Skeleton for Images */
.image-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    width: 100%;
    height: 100%;
    border-radius: 10px;
}

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

/* Connection Speed Indicator (optional debug tool) */
.connection-speed-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    z-index: 1000;
    display: none; /* Hidden by default, can be enabled for debugging */
}

.connection-speed-indicator.slow {
    background: #e74c3c;
}

.connection-speed-indicator.medium {
    background: #f39c12;
}

.connection-speed-indicator.fast {
    background: #27ae60;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .connection-notification {
        top: 60px;
        right: 10px;
        left: 10px;
        font-size: 13px;
    }

    .adaptive-loading-indicator {
        padding: 15px;
    }

    .adaptive-loading-indicator .spinner {
        width: 30px;
        height: 30px;
    }

    .video-placeholder {
        min-height: 200px;
    }

    .video-placeholder-content i {
        font-size: 36px;
    }

    .video-placeholder-content p {
        font-size: 14px;
    }
}

/* Print styles */
@media print {
    .adaptive-loading-indicator,
    .connection-notification,
    .video-placeholder,
    .connection-speed-indicator {
        display: none !important;
    }
}

/* Accessibility */
.adaptive-loading-indicator:focus,
.video-enable-btn:focus {
    outline: 2px solid #2c5f8d;
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .adaptive-loading-indicator .spinner,
    .adaptive-loaded,
    .connection-notification,
    .image-skeleton {
        animation: none !important;
    }
}