/* =====================================================
   Nautilus — loading skeletons & shimmer
   Parchment-toned shimmer so pages feel alive while data
   loads instead of showing an empty "Initializing..." box.
   ===================================================== */

@keyframes naut-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
@keyframes naut-fadein {
    from { opacity: 0.15; }
    to   { opacity: 1; }
}

/* Generic shimmer block */
.skel {
    position: relative;
    overflow: hidden;
    background-color: var(--parchment-dark);
    background-image: linear-gradient(100deg,
        rgba(255, 255, 255, 0) 20%,
        rgba(255, 255, 255, 0.45) 50%,
        rgba(255, 255, 255, 0) 80%);
    background-size: 200% 100%;
    background-repeat: no-repeat;
    animation: naut-shimmer 1.5s linear infinite;
}
[data-theme="dark"] .skel {
    background-color: #3a3a3a;
    background-image: linear-gradient(100deg,
        rgba(255, 255, 255, 0) 20%,
        rgba(255, 255, 255, 0.10) 50%,
        rgba(255, 255, 255, 0) 80%);
}

/* Home — shimmer rows mirroring .row-wrapper / .row-scroller / .card */
.skel-row { margin-bottom: 3rem; padding: 0 30px; }
.skel-title {
    height: 34px;
    width: 240px;
    margin-bottom: 1rem;
    border-radius: 3px;
    border-bottom: 1px solid var(--gold);
}
.skel-scroller {
    display: flex;
    gap: 1.5rem;
    overflow: hidden;
    padding: 1rem 0 1.5rem 0.3rem;
}
.skel-card {
    flex: 0 0 auto;
    width: 180px;
    aspect-ratio: 2 / 3;
    border: 3px solid var(--parchment-dark);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

/* Collections — shimmer grid */
.skel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.5rem;
    padding: 1.5rem 30px;
}
.skel-grid .skel-card { width: 100%; }

/* Show page — shimmer hero + episode rows */
.skel-hero {
    display: flex;
    gap: 24px;
    padding: 24px 30px;
    align-items: flex-start;
}
.skel-hero-poster { width: 200px; aspect-ratio: 2 / 3; border-radius: 6px; flex: 0 0 auto; }
.skel-hero-lines { flex: 1; display: flex; flex-direction: column; gap: 12px; padding-top: 10px; }
.skel-line { height: 18px; border-radius: 3px; }
.skel-line.lg { height: 40px; width: 55%; }
.skel-line.sm { width: 30%; }
.skel-ep {
    height: 84px;
    margin: 0 30px 12px;
    border-radius: 6px;
}

/* Poster / thumbnail shimmer placeholder that fades into the real image */
.card .poster,
.rec-card .poster,
.ep-thumb img {
    background-color: var(--parchment-dark);
    background-image: linear-gradient(100deg,
        rgba(255, 255, 255, 0) 20%,
        rgba(255, 255, 255, 0.35) 50%,
        rgba(255, 255, 255, 0) 80%);
    background-size: 200% 100%;
    background-repeat: no-repeat;
    animation: naut-shimmer 1.5s linear infinite;
}
[data-theme="dark"] .card .poster,
[data-theme="dark"] .rec-card .poster,
[data-theme="dark"] .ep-thumb img {
    background-color: #3a3a3a;
}
.card .poster.loaded,
.rec-card .poster.loaded,
.ep-thumb img.loaded {
    background-image: none;
    animation: naut-fadein 0.45s ease;
}

/* Small inline spinner (compass) for buttons / inline waits */
.naut-inline-spin {
    display: inline-block;
    width: 1em;
    height: 1em;
    border: 2px solid var(--gold);
    border-top-color: transparent;
    border-radius: 50%;
    animation: naut-spin 0.8s linear infinite;
    vertical-align: -0.15em;
}
@keyframes naut-spin { to { transform: rotate(360deg); } }