.gallery-header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 16px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    border-bottom: 1px solid var(--muted-border);
    background-color: color-mix(in srgb, var(--background) 80%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.gallery-nav-btn {
    width: 42px;
    height: 42px;
    padding: 0;
    flex-shrink: 0;

    display: flex;
    align-items: center;
    justify-content: center;

    border: 1px solid var(--muted-border);
    border-radius: 999px;
    background-color: var(--surface);
    color: var(--text);
    text-decoration: none;

    cursor: pointer;
    transition: border-color 0.3s ease, background-color 0.3s ease, transform 0.3s ease;
}

.gallery-nav-btn:hover {
    border-color: var(--accent);
    background-color: color-mix(in srgb, var(--secondary) 20%, transparent);
    transform: translateY(-2px);
}

.gallery-title {
    position: absolute;
    left: 0;
    right: 0;
    margin: 0;
    text-align: center;
    font-size: 1.4rem;
    font-weight: 700;
    pointer-events: none;
}

.gallery-main {
    padding: 24px 16px;
    max-width: 470px;
    margin: 0 auto;
    box-sizing: border-box;
}

.photo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}


.grid-item {
    padding: 0;
    border: none;
    border-radius: 10px;
    background: color-mix(in srgb, var(--secondary) 16%, transparent);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 1 / 1;
    opacity: 0.92;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.grid-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.grid-item:hover {
    opacity: 1;
    transform: scale(1.02);
}

/* override global body flex centering for full-width layout */
body {
    display: block;
    padding: 0;
    min-height: 100vh;
}

/* ── Popup ─────────────────────────────────────── */

.photo-popup {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: stretch;
    background: rgba(0, 0, 0, 0.90);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.photo-popup.is-open {
    opacity: 1;
    pointer-events: auto;
}

.popup-close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 10;
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.popup-close:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: scale(1.08);
}

.popup-inner {
    display: flex;
    flex-direction: column;
    width: 100%;
    overflow-y: auto;
}

.popup-image-wrap {
    flex: 1;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 24px 20px;
}

.popup-photo {
    max-width: 100%;
    max-height: 65vh;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6);
    display: block;
}

.popup-info {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px 24px 32px;
    background: rgba(255, 255, 255, 0.04);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: #fff;
}

.popup-meta {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.popup-meta-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.82);
}

.popup-meta-row .material-symbols-rounded {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.48);
    flex-shrink: 0;
}

.popup-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.popup-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.07);
    color: #fff;
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.popup-btn:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.popup-btn .material-symbols-rounded {
    font-size: 18px;
}

.popup-actions {
    flex-direction: row;
}

.popup-btn {
    flex: 1;
    justify-content: center;
}