/**
 * Shared user-shell atmosphere (login + /play only).
 * Do not load from admin chrome — keeps admin and listener shells isolated.
 *
 * Owns: living/still backdrop, scrim, shell logo lockup.
 * Brand tokens (--shell-scrim-strength, --bg-color, …) come from brand CSS vars.
 */

/* Living backdrop */
#shell-bg-video,
.shell-bg-video-el {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    z-index: -2;
    display: none;
    background: var(--bg-color, #000);
    pointer-events: none;
}

body.shell-bg-image {
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

body.shell-bg-video {
    background-image: none;
}

/* Brand-tunable scrim (effects.backdrop_dim → --shell-scrim-strength). */
body.shell-bg-image::before,
body.shell-bg-video::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: #000;
    opacity: var(--shell-scrim-strength, 0.72);
}

/* Shell logo lockup (Base on login; playlist brand with Base fallback on /play). */
.shell-logo {
    text-align: center;
    padding: 0;
    flex-shrink: 0;
}

.shell-logo-img {
    max-width: 320px;
    max-height: 100px;
    width: auto;
    height: auto;
    display: block;
    margin: 0 auto;
    object-fit: contain;
}

.shell-logo-img--splash {
    max-width: 320px;
    max-height: none;
    width: 100%;
}

@container (max-width: 36rem) {
    .shell-logo-img {
        max-width: min(100%, 240px);
        max-height: 80px;
    }
}

@media (max-width: 768px) {
    .shell-logo-img {
        max-width: 100%;
        max-height: 80px;
        width: auto;
    }
}

/* Dense stacked player chrome (narrow phones) — keep lockup small. */
@media (max-width: 480px) {
    .shell-logo {
        padding-top: 0;
    }

    .shell-logo-img {
        max-width: min(100%, 200px);
        max-height: 80px;
        width: auto;
        height: auto;
    }
}