:root {
    --bg: #14161a;
    --panel: #1d2026;
    --text: #e8eaed;
    --muted: #9aa0a6;
    --accent: #4cc2ff;
    --radius: 10px;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.6rem; margin: 0 0 .25rem; font-weight: 600; }

.muted { color: var(--muted); }

main { max-width: 1400px; margin: 0 auto; padding: 1.25rem 16px 3rem; }

button {
    font: inherit;
    cursor: pointer;
}

/* --- barra superiore */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: .6rem 16px;
    background: var(--panel);
    border-bottom: 1px solid #2a2e36;
}
.brand { color: var(--text); font-weight: 600; letter-spacing: .02em; }
.link {
    background: none;
    border: 0;
    color: var(--muted);
    padding: .25rem .5rem;
}
.link:hover { color: var(--text); text-decoration: none; }
.topbar-actions { display: flex; align-items: center; gap: .5rem; }
.topbar-actions a.link { font: inherit; }

/* --- login */
.login {
    max-width: 340px;
    margin-top: 12vh;
    text-align: center;
}
.login form { display: grid; gap: .9rem; margin-top: 1.5rem; text-align: left; }
.login label { display: grid; gap: .3rem; color: var(--muted); font-size: .9rem; }
.login input {
    font: inherit;
    padding: .6rem .7rem;
    border-radius: 8px;
    border: 1px solid #333843;
    background: var(--panel);
    color: var(--text);
}
.login input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.login button {
    padding: .65rem;
    border: 0;
    border-radius: 8px;
    background: var(--accent);
    color: #04202e;
    font-weight: 600;
}
.error { color: #ff7b72; margin: 0; }

/* --- elenco album */
.cards {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    margin-top: 1rem;
}
.card {
    display: block;
    background: var(--panel);
    border-radius: var(--radius);
    overflow: hidden;
    color: var(--text);
    transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0, 0, 0, .45); text-decoration: none; }
.card img { display: block; width: 100%; aspect-ratio: 3 / 2; object-fit: cover; background: #0c0d10; }
.card-body { display: grid; gap: .1rem; padding: .7rem .9rem .9rem; }

/* --- pagina album */
.crumbs { margin-bottom: .75rem; }
.album-head { margin-bottom: 1.25rem; }

.grid {
    display: grid;
    gap: 6px;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}
.tile {
    display: block;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 6px;
    background: var(--panel);
}
.tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .25s ease;
}
.tile:hover img, .tile:focus-visible img { transform: scale(1.05); }
.tile:focus-visible { outline: 2px solid var(--accent); }

/* --- video */
.tile { position: relative; }
.ph { display: block; width: 100%; height: 100%; background: linear-gradient(135deg, #252932, #15171c); }
.card-ph { aspect-ratio: 3 / 2; height: auto; }
.play {
    position: absolute;
    left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    width: 44px; height: 44px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(0, 0, 0, .6);
    color: #fff;
    font-size: 1.1rem;
    padding-left: 3px;
    pointer-events: none;
}
.lb-video { max-width: 100%; max-height: 100%; background: #000; }

/* --- lightbox */
.lb {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    background: rgba(0, 0, 0, .94);
    touch-action: pan-y;
}
.lb.open { display: block; }
.lb-stage { position: absolute; inset: 48px 0 0 0; display: flex; align-items: center; justify-content: center; }
.lb-img { max-width: 100%; max-height: 100%; object-fit: contain; user-select: none; }
.lb-bar {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    color: var(--muted);
}
.lb-bar a, .lb-bar button { color: var(--text); }
.lb button {
    background: none;
    border: 0;
    color: var(--text);
    padding: .4rem .7rem;
    font-size: 1.4rem;
    line-height: 1;
}
.lb-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2.2rem !important;
    padding: 1rem .8rem !important;
    background: rgba(0, 0, 0, .35) !important;
    border-radius: 8px;
}
.lb-prev { left: 8px; }
.lb-next { right: 8px; }
.lb button:hover, .lb button:focus-visible { background: rgba(255, 255, 255, .15); }
.lb-spinner {
    position: absolute;
    width: 36px; height: 36px;
    border: 3px solid #444;
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    display: none;
}
.lb.loading .lb-spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

body.lb-lock { overflow: hidden; }

@media (max-width: 600px) {
    .grid { grid-template-columns: repeat(3, 1fr); gap: 3px; }
    .tile { border-radius: 3px; }
    .lb-nav { display: none; } /* su mobile si scorre col dito */
}