/* ========================================
   Loading Skeleton & Performance Styles
   ======================================== */

/* Loading skeleton animation */
@keyframes skeleton-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Loading screen overlay */
.page-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--color-white, #fff);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.page-loader .loader-logo {
    width: 60px;
    height: 60px;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(0.95); }
    50% { opacity: 1; transform: scale(1); }
}

.page-loader .loader-bar {
    width: 120px;
    height: 3px;
    background: #e5e7eb;
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.page-loader .loader-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -40%;
    width: 40%;
    height: 100%;
    background: linear-gradient(90deg, transparent, #3b82f6, transparent);
    animation: loader-slide 1.2s ease-in-out infinite;
}

@keyframes loader-slide {
    0% { left: -40%; }
    100% { left: 100%; }
}

/* Skeleton placeholders for CMS-rendered content */
.skeleton-block {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: 8px;
}

/* Lazy-loaded image fade in */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img[loading="lazy"].loaded,
img[loading="lazy"]:not([data-src]) {
    opacity: 1;
}

/* Native lazy loading also gets the transition */
img.loaded {
    opacity: 1 !important;
}

/* Reduce layout shift */
img {
    content-visibility: auto;
}

video {
    content-visibility: auto;
}

/* Font display swap — prevent FOIT */
@font-face {
    font-display: swap;
}