/* ================= IMAGE LOADING STATES ================= */

/* Loading state - shimmer effect */
img.img-loading {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    min-height: 100px; /* Prevent layout shift */
}

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

/* Dark theme shimmer */
[data-theme="dark"] img.img-loading {
    background: linear-gradient(
        90deg,
        #2a2a2a 25%,
        #1a1a1a 50%,
        #2a2a2a 75%
    );
    background-size: 200% 100%;
}

/* Loaded state - fade in */
img.img-loaded {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Error state */
img.img-error {
    opacity: 0.6;
    filter: grayscale(100%);
}

/* Prevent layout shift with aspect ratio boxes */
.img-wrapper {
    position: relative;
    overflow: hidden;
    background: #f5f5f5;
}

.img-wrapper::before {
    content: '';
    display: block;
    padding-top: 75%; /* Default 4:3 aspect ratio */
}

.img-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Specific aspect ratios */
.img-wrapper--16-9::before {
    padding-top: 56.25%; /* 16:9 */
}

.img-wrapper--1-1::before {
    padding-top: 100%; /* Square */
}

.img-wrapper--4-3::before {
    padding-top: 75%; /* 4:3 */
}

/* Portrait mode specific */
#portrait-view .p-cert-badge {
    transition: transform 0.3s, opacity 0.3s;
}

#portrait-view .p-cert-badge.img-loading {
    opacity: 0.5;
}

#portrait-view .p-cert-badge.img-loaded {
    opacity: 1;
}

#portrait-view .p-project-img {
    transition: opacity 0.3s;
    background: #f5f5f5;
}

[data-theme="dark"] #portrait-view .p-project-img {
    background: #2a2a2a;
}

/* Prevent content jumping during image load */
.p-project-img,
.p-cert-badge {
    display: block;
    width: 100%;
    height: auto;
}

/* Progressive image loading blur effect (optional) */
.progressive-img {
    filter: blur(10px);
    transition: filter 0.3s;
}

.progressive-img.img-loaded {
    filter: blur(0);
}

/* Responsive image handling */
@media (max-width: 768px) {
    img.img-loading {
        min-height: 75px;
    }
}