/**
 * BlueCart Loading Spinner Component - Modular CSS System
 * Global loading spinner using new CSS custom properties
 */

/* ========================================
   LOADING SPINNER COMPONENT
   ======================================== */

/* Loading Overlay */
.bluecart-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--overlay-heavy);
    backdrop-filter: blur(8px);
    z-index: var(--z-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
    opacity: 0;
    pointer-events: none;
}

.bluecart-loading-overlay.show {
    opacity: 1;
    pointer-events: all;
}

/* Loading Container */
.bluecart-loading-container {
    text-align: center;
    padding: var(--spacing-8);
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--slate-100);
    max-width: 300px;
    animation: slideUp var(--transition-normal) ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Spinner Element */
.bluecart-spinner {
    display: inline-block;
    position: relative;
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-6);
}

.bluecart-spinner-ring {
    box-sizing: border-box;
    display: block;
    position: absolute;
    width: 52px;
    height: 52px;
    margin: 4px;
    border: 4px solid transparent;
    border-radius: var(--border-radius-full);
    animation: bluecart-spinner-rotate 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: var(--bluecart-primary) transparent transparent transparent;
}

.bluecart-spinner-ring:nth-child(1) {
    animation-delay: -0.45s;
    border-color: var(--bluecart-primary) transparent transparent transparent;
}

.bluecart-spinner-ring:nth-child(2) {
    animation-delay: -0.3s;
    border-color: var(--bluecart-accent) transparent transparent transparent;
}

.bluecart-spinner-ring:nth-child(3) {
    animation-delay: -0.15s;
    border-color: var(--bluecart-secondary) transparent transparent transparent;
}

.bluecart-spinner-ring:nth-child(4) {
    animation-delay: 0s;
    border-color: var(--bluecart-primary-light) transparent transparent transparent;
}

@keyframes bluecart-spinner-rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Loading Text */
.bluecart-loading-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--bluecart-primary);
    margin-bottom: var(--spacing-2);
    font-family: var(--font-primary);
}

.bluecart-loading-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-normal);
    font-family: var(--font-primary);
}

/* ========================================
   MINI SPINNER VARIANTS
   ======================================== */

/* Small Spinner for Buttons */
.spinner-small {
    width: 20px;
    height: 20px;
    margin: 0;
}

.spinner-small .bluecart-spinner-ring {
    width: 16px;
    height: 16px;
    margin: 2px;
    border-width: 2px;
}

/* Medium Spinner for Cards */
.spinner-medium {
    width: 40px;
    height: 40px;
}

.spinner-medium .bluecart-spinner-ring {
    width: 32px;
    height: 32px;
    margin: 4px;
    border-width: 3px;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .bluecart-loading-container {
        margin: var(--spacing-4);
        padding: var(--spacing-6);
        max-width: calc(100% - var(--spacing-8));
    }
    
    .bluecart-spinner {
        width: 50px;
        height: 50px;
    }
    
    .bluecart-spinner-ring {
        width: 42px;
        height: 42px;
        border-width: 3px;
    }
}

/* ========================================
   ACCESSIBILITY & PREFERENCES
   ======================================== */

/* High contrast mode */
@media (prefers-contrast: high) {
    .bluecart-loading-container {
    border: 2px solid var(--bluecart-primary);
    }
    
    .bluecart-spinner-ring {
        border-width: 5px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .bluecart-loading-overlay {
        transition: none;
    }
    
    .bluecart-loading-container {
        animation: none;
    }
    
    .bluecart-spinner-ring {
        animation: none;
        border-color: var(--bluecart-primary) var(--slate-200) var(--slate-200) var(--slate-200);
    }
}

/* ========================================
   LOADING STATES FOR CONTENT
   ======================================== */

/* Page Loading State */
.page-loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.page-loading::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-light);
    z-index: 1;
}

/* Button Loading State */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: var(--border-radius-full);
    animation: bluecart-spinner-rotate 1s linear infinite;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

/* Show/Hide Loading */
.loading-hidden {
    display: none !important;
}

.loading-visible {
    display: block !important;
}

/* Loading Text Animations */
.loading-text-pulse {
    animation: textPulse 2s ease-in-out infinite;
}

@keyframes textPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ========================================
   LEGACY COMPATIBILITY
   ======================================== */
.loading-spinner,
.spinner,
.homepage-loading-spinner,
.homepage-spinner {
    display: none !important;
}

/* Skeleton Loading States */
.skeleton {
    background: linear-gradient(90deg, var(--border-1) 25%, var(--slate-100) 50%, var(--border-1) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

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