/* Lightbox base styles */
:root{
    --lb-bg: rgba(0,0,0,0.85);
    --lb-button-bg: rgba(255,255,255,0.06);
    --lb-button-color: #fff;
}
.lb-overlay{
    position:fixed;
    inset:0;
    background:var(--lb-bg);
    display:flex;
    align-items:center;
    justify-content:center;
    z-index:9999;
    opacity:0;
    pointer-events:none;
    transition:opacity .18s ease;
}
.lb-overlay.open{
    opacity:1;
    pointer-events:auto;
}
.lb-wrap{
    max-width:95vw;
    max-height:95vh;
    position:relative;
    display:flex;
    align-items:center;
    justify-content:center;
}
.lb-img{
    max-width:100%;
    max-height:100%;
    transform-origin:center center;
    transition:transform .12s ease;
    box-shadow:0 8px 30px rgba(0,0,0,0.6);
    border-radius:6px;
}
.lb-controls{
    position:absolute;
    top:12px;
    right:12px;
    display:flex;
    gap:8px;
}
.lb-btn{
    /* High-contrast buttons: white background, dark text for readability over dark overlay */
    background: #ffffff;
    color: #0b1220;
    border: 1px solid rgba(11,18,32,0.08);
    padding:10px 12px;
    border-radius:8px;
    cursor:pointer;
    font-size:16px;
    line-height:1;
    font-weight:600;
    box-shadow: 0 6px 16px rgba(2,6,23,0.18);
    transition:transform .08s ease, box-shadow .12s ease, opacity .08s ease;
}
.lb-btn:hover{
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(2,6,23,0.22);
}
.lb-btn:active{ transform: translateY(0); }
.lb-btn:focus{ outline: none; box-shadow: 0 0 0 4px rgba(3,102,214,0.18); }
.lb-btn[disabled]{ opacity:0.5; cursor:default }
.lb-caption{
    position:absolute;
    /* più in basso: avvicina la caption al bordo inferiore */
    bottom:6px;
    left:12px;
    right:12px;
    color:#111;
    font-size:16px;
    text-align:left;
    /* sfondo meno nero: effetto "frosted glass" chiaro per miglior leggibilità */
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    padding:10px 12px;
    border-radius:8px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
    border: 1px solid rgba(0,0,0,0.06);
}
.lb-close-area{position:absolute;inset:0;}
@media (max-width:640px){
    .lb-controls{top:8px;right:8px}
    .lb-btn{padding:6px}
}