/* Loading Spinner Styles */

/* Global Loading Overlay */
.loading-overlay,
#globalLoadingOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4); /* Stronger default transparency */
    display: flex;
    display: -webkit-flex; /* Safari */
    display: -ms-flexbox; /* IE10+ */
    justify-content: center;
    -webkit-justify-content: center; /* Safari */
    -ms-flex-pack: center; /* IE10+ */
    align-items: center;
    -webkit-align-items: center; /* Safari */
    -ms-flex-align: center; /* IE10+ */
    z-index: 9999;
    backdrop-filter: blur(3px); /* Stronger blur effect */
    -webkit-backdrop-filter: blur(3px); /* Safari */
    /* Multiple fallback backgrounds */
    background: rgba(0, 0, 0, 0.4);
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4));
}

/* Edge specific fixes and better fallbacks */
@supports not (backdrop-filter: blur(3px)) {
    .loading-overlay,
    #globalLoadingOverlay {
        background-color: rgba(0, 0, 0, 0.6); /* Stronger fallback */
        background: rgba(0, 0, 0, 0.6);
    }
}

/* Additional fallback for very old browsers */
.no-backdrop-filter .loading-overlay,
.no-backdrop-filter #globalLoadingOverlay {
    background-color: rgba(0, 0, 0, 0.7);
}

.loading-overlay.hidden,
#globalLoadingOverlay.hidden {
    display: none;
}

/* Loading Container - Not used for transparent overlay */
/*
.loading-container {
    background: white;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: 300px;
    width: 90%;
}
*/

/* Spinner Animation */
.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Alternative Pulse Spinner */
.spinner-pulse {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    background-color: #007bff;
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

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

/* Dots Spinner */
.spinner-dots {
    display: inline-block;
    position: relative;
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
}

.spinner-dots div {
    position: absolute;
    top: 20px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #007bff;
    animation-timing-function: cubic-bezier(0, 1, 1, 0);
}

.spinner-dots div:nth-child(1) {
    left: 6px;
    animation: dots1 0.6s infinite;
}

.spinner-dots div:nth-child(2) {
    left: 6px;
    animation: dots2 0.6s infinite;
}

.spinner-dots div:nth-child(3) {
    left: 24px;
    animation: dots2 0.6s infinite;
}

.spinner-dots div:nth-child(4) {
    left: 36px;
    animation: dots3 0.6s infinite;
}

@keyframes dots1 {
    0% { transform: scale(0); }
    100% { transform: scale(1); }
}

@keyframes dots3 {
    0% { transform: scale(1); }
    100% { transform: scale(0); }
}

@keyframes dots2 {
    0% { transform: translate(0, 0); }
    100% { transform: translate(18px, 0); }
}

/* Loading Text */
.loading-text {
    color: #333;
    font-size: 16px;
    font-weight: 500;
    margin: 0;
}

.loading-subtext {
    color: #666;
    font-size: 12px;
    margin: 5px 0 0;
}

/* Mini Loading for Buttons - DISABLED for global overlay approach */
/*
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.btn-loading .btn-text {
    visibility: hidden;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin-top: -8px;
    margin-left: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
*/

/* Inline Loading */
.loading-inline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.loading-inline .spinner-mini {
    width: 16px;
    height: 16px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Table Loading */
.table-loading {
    position: relative;
}

.table-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

/* Card Loading */
.card-loading {
    position: relative;
    pointer-events: none;
}

.card-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    border-radius: inherit;
    z-index: 5;
}

.card-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin-top: -15px;
    margin-left: -15px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 6;
}

/* Page Loading */
.page-loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #0056b3, #007bff);
    background-size: 200% 100%;
    animation: loading-bar 2s linear infinite;
    z-index: 9998;
}

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

/* Form Loading */
.form-loading {
    position: relative;
    pointer-events: none;
}

.form-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.7);
    z-index: 5;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

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

.skeleton-title {
    height: 24px;
    border-radius: 4px;
    margin-bottom: 12px;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .loading-container {
        background: #2d3748;
        color: white;
    }
    
    .loading-text {
        color: white;
    }
    
    .loading-subtext {
        color: #a0aec0;
    }
}

/* Responsive */
@media (max-width: 576px) {
    .loading-container {
        padding: 20px;
    }
    
    .loading-text {
        font-size: 14px;
    }
}