/**
 * Loading System CSS Styles
 * Provides visual feedback for the smart loading system
 */

/* Loading Progress Container */
.loading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: rgba(0, 0, 0, 0.1);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.loading-progress.show {
    opacity: 1;
}

/* Loading Progress Bar */
.loading-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #007bff, #28a745);
    transition: width 0.5s ease, background-color 0.3s ease;
    border-radius: 0 2px 2px 0;
}

/* Loading Phase Styles */
.loading-phase-critical {
    background: linear-gradient(90deg, #dc3545, #fd7e14) !important;
}

.loading-phase-secondary {
    background: linear-gradient(90deg, #007bff, #6f42c1) !important;
}

.loading-phase-optional {
    background: linear-gradient(90deg, #28a745, #20c997) !important;
}

/* Loading Progress Text */
.loading-progress-text {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    z-index: 9998;
    opacity: 0;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.loading-progress-text.show {
    opacity: 1;
}

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

.element-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-spinner.small {
    width: 16px;
    height: 16px;
    border-width: 1px;
}

.loading-spinner.large {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9997;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.loading-overlay-content {
    text-align: center;
    color: #333;
}

.loading-overlay-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

.loading-overlay-text {
    font-size: 16px;
    font-weight: 500;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .loading-progress-text {
        font-size: 12px;
        padding: 6px 12px;
        top: 15px;
    }
    
    .loading-overlay-spinner {
        width: 32px;
        height: 32px;
        border-width: 3px;
    }
    
    .loading-overlay-text {
        font-size: 14px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .loading-progress {
        background-color: rgba(255, 255, 255, 0.1);
    }
    
    .loading-progress-text {
        background: rgba(255, 255, 255, 0.9);
        color: #333;
    }
    
    .loading-overlay {
        background: rgba(0, 0, 0, 0.9);
    }
    
    .loading-overlay-content {
        color: #fff;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

.fade-out {
    animation: fadeOut 0.3s ease-out;
}

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

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

/* Pulse Animation */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}