/**
 * Performance optimizations CSS
 * Includes lazy loading transitions, loading states, and performance improvements
 */

/* Lazy loading transitions */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    background-color: #f8f9fa;
}

.lazy-loaded {
    opacity: 1;
}

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

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

.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid #007bff;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 11;
}

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

/* Button loading states */
.btn.loading {
    position: relative;
    color: transparent !important;
}

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

/* Image optimization */
img {
    max-width: 100%;
    height: auto;
}

/* Reduce layout shifts */
.property-image {
    aspect-ratio: 4/3;
    object-fit: cover;
    background-color: #f8f9fa;
}

.gallery-image img {
    aspect-ratio: 3/2;
    object-fit: cover;
}

/* Performance optimizations */
.property-card {
    contain: layout style paint;
}

.property-list {
    contain: layout;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Critical resource hints */
.preload-hint {
    display: none;
}

/* Notification animations */
.notification {
    animation: slideInRight 0.3s ease-out;
}

.notification.removing {
    animation: slideOutRight 0.3s ease-in;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* Form validation improvements */
.form-control.is-invalid {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Loading skeleton for property cards */
.property-card.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; }
}

/* Optimize font loading */
@font-face {
    font-family: 'Segoe UI';
    font-display: swap;
}

/* Critical CSS inlining hint */
.above-fold {
    /* Styles for above-the-fold content */
}

/* Defer non-critical styles */
.below-fold {
    /* Styles for below-the-fold content */
}