:root {
    --bg: #fff;
    --fg: #222;
    --accent: #007acc;
    --lightbox-backdrop: rgb(255 255 255 / 90%);
    --lightbox-shadow: 0 0 10px 0 rgb(0 0 0 / 10%);
    --surface-elevated: #f3f3f3;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111;
        --fg: #eee;
        --accent: #46c;
        --lightbox-backdrop: rgb(0 0 0 / 90%);
        --surface-elevated: #222;
    }
}

/* Explicit theme toggle overrides (win over media query when set) */
html {
    &[data-theme='dark'] {
        --bg: #111;
        --fg: #eee;
        --accent: #46c;
        --lightbox-backdrop: rgb(0 0 0 / 90%);
        --surface-elevated: #222;
    }

    &[data-theme='light'] {
        --bg: #fff;
        --fg: #222;
        --accent: #007acc;
        --lightbox-backdrop: rgb(255 255 255 / 90%);
        --lightbox-shadow: 0 0 10px 0 rgb(0 0 0 / 10%);
        --surface-elevated: #f3f3f3;
    }
}

body {
    margin: 0;
    font-family: sans-serif;
    background-color: var(--bg);
    color: var(--fg);
}

/* Lightbox (structure may be created by script.js; ensures styles apply to injected content) */
.lightbox {
    align-items: stretch;
    background: var(--surface-elevated);
    border: none;
    border-radius: 8px;
    box-shadow: var(--lightbox-shadow);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    justify-content: center;
    max-width: 90vw;
    padding: 0.5rem 1rem;
    opacity: 0;
    transition: opacity 0.3s;
}

.lightbox::backdrop {
    background: var(--lightbox-backdrop);
}

.lightbox[open] {
    opacity: 1;
}

.lightbox header {
    display: flex;
    justify-content: flex-end;
    padding: 0.25rem 0.25rem 0 0;
}

.lightbox .lb-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--fg);
    cursor: pointer;
}

.lightbox .lb-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.lightbox .lb-content img,
.lightbox .lb-content video {
    max-width: 90vw;
    max-height: 80vh;
    border-radius: 8px;
}

.lightbox .lb-caption {
    color: var(--fg);
    margin-top: 0.5rem;
    text-align: center;
    max-width: 90vw;
}

.lightbox-open {
    overflow: hidden;
}

.gallery-grid {
    column-count: 1;
    column-gap: 1rem;
    padding: 1rem;
}

@media (width >= 768px) {
    .gallery-grid {
        column-count: 2;
    }
}

@media (width >= 1024px) {
    .gallery-grid {
        column-count: 3;
    }
}