/**
 * Loading Indicators CSS - Windows 95 Retro
 * Comprehensive loading states for all async operations
 */

/* Global Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
}

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

/* Loading Spinner Container */
.loading-spinner {
    background: var(--win95-gray, #c0c0c0);
    padding: 16px 24px;
    border: 2px solid;
    border-color: var(--win95-white, #ffffff) var(--win95-black, #000000) 
                  var(--win95-black, #000000) var(--win95-white, #ffffff);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 250px;
}

/* Spinner Animation - Simple Dotted Progress */
.spinner {
    width: 200px;
    height: 20px;
    border: 2px solid;
    border-color: var(--win95-gray-dark, #808080) var(--win95-white, #ffffff) 
                  var(--win95-white, #ffffff) var(--win95-gray-dark, #808080);
    background: var(--win95-white, #ffffff);
    position: relative;
    overflow: hidden;
}

.spinner::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 30%;
    background: var(--win95-blue, #000080);
    animation: progress-bar 2s linear infinite;
}

@keyframes progress-bar {
    0% { left: -30%; }
    100% { left: 100%; }
}

/* Loading Text */
.loading-text {
    font-size: 11px;
    font-weight: bold;
    color: var(--win95-black, #000000);
    text-align: center;
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Tahoma, Arial, sans-serif;
}

.loading-subtext {
    font-size: 11px;
    color: var(--win95-black, #000000);
    text-align: center;
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Tahoma, Arial, sans-serif;
}

/* Progress Bar */
.loading-progress {
    width: 100%;
    height: 20px;
    border: 2px solid;
    border-color: var(--win95-gray-dark, #808080) var(--win95-white, #ffffff) 
                  var(--win95-white, #ffffff) var(--win95-gray-dark, #808080);
    background: var(--win95-white, #ffffff);
    overflow: hidden;
    margin-top: 4px;
}

.loading-progress-bar {
    height: 100%;
    background: var(--win95-blue, #000080);
}

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

.btn-loading::after {
    content: '...';
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Tahoma, Arial, sans-serif;
}

/* Skeleton Loading for Content */
.skeleton {
    background: var(--win95-gray, #c0c0c0);
    background-image: repeating-linear-gradient(
        90deg,
        var(--win95-gray, #c0c0c0) 0px,
        var(--win95-gray-light, #dfdfdf) 50px,
        var(--win95-gray, #c0c0c0) 100px
    );
    background-size: 200px 100%;
    animation: skeleton-loading 2s linear infinite;
}

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

.skeleton-text {
    height: 11px;
    margin: 4px 0;
}

.skeleton-heading {
    height: 16px;
    width: 60%;
    margin: 8px 0;
}

.skeleton-paragraph {
    height: 11px;
    margin: 2px 0;
}

.skeleton-paragraph:nth-child(3) {
    width: 90%;
}

.skeleton-paragraph:nth-child(4) {
    width: 85%;
}

.skeleton-paragraph:last-child {
    width: 70%;
}

/* Panel Loading State */
.panel-loading {
    position: relative;
    pointer-events: none;
}

.panel-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(192, 192, 192, 0.8);
    z-index: 100;
}

.panel-loading::after {
    content: 'Loading...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 8px 16px;
    background: var(--win95-gray, #c0c0c0);
    border: 2px solid;
    border-color: var(--win95-white, #ffffff) var(--win95-black, #000000) 
                  var(--win95-black, #000000) var(--win95-white, #ffffff);
    font-size: 11px;
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Tahoma, Arial, sans-serif;
    font-weight: bold;
    color: var(--win95-black, #000000);
    z-index: 101;
}

/* Small Inline Spinner */
.spinner-small {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid;
    border-color: var(--win95-gray-dark, #808080) var(--win95-white, #ffffff) 
                  var(--win95-white, #ffffff) var(--win95-gray-dark, #808080);
    background: var(--win95-white, #ffffff);
    vertical-align: middle;
    margin-left: 4px;
    position: relative;
}

.spinner-small::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--win95-blue, #000080);
    animation: small-progress 1s linear infinite;
}

@keyframes small-progress {
    0% { left: 0; }
    100% { left: 8px; }
}

/* Processing Indicator for File Operations */
.processing-indicator {
    position: fixed;
    bottom: 16px;
    right: 16px;
    background: var(--win95-gray, #c0c0c0);
    padding: 8px 12px;
    border: 2px solid;
    border-color: var(--win95-white, #ffffff) var(--win95-gray-dark, #808080) 
                  var(--win95-gray-dark, #808080) var(--win95-white, #ffffff);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
}

.processing-indicator.active {
    opacity: 1;
    visibility: visible;
}

.processing-icon {
    width: 16px;
    height: 16px;
    border: 2px solid;
    border-color: var(--win95-gray-dark, #808080) var(--win95-white, #ffffff) 
                  var(--win95-white, #ffffff) var(--win95-gray-dark, #808080);
    background: var(--win95-white, #ffffff);
    position: relative;
    overflow: hidden;
}

.processing-icon::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 6px;
    height: 100%;
    background: var(--win95-blue, #000080);
    animation: small-progress 1s linear infinite;
}

.processing-text {
    font-size: 11px;
    font-weight: bold;
    color: var(--win95-black, #000000);
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Tahoma, Arial, sans-serif;
}

/* Pulse Animation for Updates - Win95 Style */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.pulsing {
    animation: pulse 1s ease-in-out infinite;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .loading-spinner {
        padding: 12px 16px;
        min-width: 200px;
    }
    
    .spinner {
        width: 150px;
    }
    
    .loading-text {
        font-size: 11px;
    }
    
    .loading-subtext {
        font-size: 11px;
    }
    
    .processing-indicator {
        bottom: 8px;
        right: 8px;
        left: 8px;
    }
}

/* Determinate Progress Indicator */
.progress-container {
    width: 100%;
    margin-top: 8px;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--win95-black, #000000);
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Tahoma, Arial, sans-serif;
    margin-bottom: 2px;
}

.progress-bar-container {
    width: 100%;
    height: 20px;
    border: 2px solid;
    border-color: var(--win95-gray-dark, #808080) var(--win95-white, #ffffff) 
                  var(--win95-white, #ffffff) var(--win95-gray-dark, #808080);
    background: var(--win95-white, #ffffff);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--win95-blue, #000080);
}

/* Success State - Win95 Message Box Style */
.success-checkmark {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--win95-gray, #c0c0c0);
    border: 2px solid;
    border-color: var(--win95-white, #ffffff) var(--win95-gray-dark, #808080) 
                  var(--win95-gray-dark, #808080) var(--win95-white, #ffffff);
    font-size: 32px;
    color: var(--win95-black, #000000);
}

.success-checkmark::before {
    content: '✓';
    font-weight: bold;
}

/* Hourglass Cursor Alternative */
.busy-cursor {
    cursor: wait;
}

/* Status Bar Loading Indicator */
.status-bar-loading {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-family: 'MS Sans Serif', 'Microsoft Sans Serif', Tahoma, Arial, sans-serif;
}

.status-bar-loading::after {
    content: '';
    width: 40px;
    height: 12px;
    border: 1px solid;
    border-color: var(--win95-gray-dark, #808080) var(--win95-white, #ffffff) 
                  var(--win95-white, #ffffff) var(--win95-gray-dark, #808080);
    background: var(--win95-white, #ffffff);
    position: relative;
    overflow: hidden;
}