/**
 * ==============================================================================
 * SADRA VISUALS — ARTBOOK PHOTOGRAPHY GALLERY DESIGN SYSTEM
 * LAYER 6.3: INLINE MICRO-VIDEO LOOP COMPONENT
 * ==============================================================================
 * Stylesheet for:
 * 1. Hardware-accelerated cinemagraph & micro-video canvas
 * 2. Progressive crossfade over base photo/LQIP
 * 3. Glassmorphic Motion status badges & Mute/Volume toggles (44px tap targets)
 * 4. Buffering spinners & manual play overlays
 * 5. Mobile-first touch ergonomics & prefers-reduced-motion compliance
 */

/* ------------------------------------------------------------------------------
 * 1. Base Video Frame & Presentation
 * ------------------------------------------------------------------------------ */
.photo-card-frame[data-has-video="true"] {
    position: relative;
}

.gallery-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    opacity: 0;
    pointer-events: none;
    z-index: 2;
    transition: opacity var(--duration-smooth) var(--ease-artbook);
    transform: translateZ(0);
    backface-visibility: hidden;
    will-change: opacity;
}

/* Crossfade into visibility when loaded & playing */
.photo-card-frame.video-ready .gallery-video,
.photo-card.is-video-playing .gallery-video {
    opacity: 1;
}

/* While video is playing, keep base LQIP/img hidden underneath cleanly */
.photo-card.is-video-playing .photo-img {
    transition: filter var(--duration-smooth) var(--ease-artbook);
}

/* ------------------------------------------------------------------------------
 * 2. Motion / Cinemagraph Badge
 * ------------------------------------------------------------------------------ */
.video-motion-badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    z-index: 4;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 9px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-primary);
    background: rgba(8, 9, 12, 0.72);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    pointer-events: none;
    box-shadow: var(--shadow-sm);
    transition: opacity var(--duration-fast), transform var(--duration-fast);
}

/* Pulsing motion beacon */
.video-motion-beacon {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent);
    box-shadow: 0 0 8px var(--accent);
    animation: motionBeaconPulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes motionBeaconPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.4;
        transform: scale(0.85);
    }
}

/* Adjust position if photo is also featured */
.photo-card-frame:has(.photo-featured-badge) .video-motion-badge {
    right: var(--space-3);
}

/* ------------------------------------------------------------------------------
 * 3. Video Sound & Mute Toggle (Touch Ergonomics: 44px min tap target)
 * ------------------------------------------------------------------------------ */
.video-mute-btn {
    position: absolute;
    bottom: var(--space-3);
    right: var(--space-3);
    z-index: 5;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0;
    background: rgba(8, 9, 12, 0.75);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transform: translateY(6px) scale(0.92);
    transition: opacity var(--duration-fast) var(--ease-artbook),
                transform var(--duration-fast) var(--ease-artbook),
                background-color var(--duration-fast),
                border-color var(--duration-fast);
}

/* Reveal mute button on hover, card focus, or when unmuted */
.photo-card:hover .video-mute-btn,
.photo-card:focus-within .video-mute-btn,
.video-mute-btn.is-unmuted,
.photo-card.is-video-playing .video-mute-btn {
    opacity: 0.9;
    transform: translateY(0) scale(1);
}

.video-mute-btn:hover {
    opacity: 1;
    transform: translateY(0) scale(1.08);
    border-color: var(--accent);
    background: rgba(8, 9, 12, 0.9);
}

.video-mute-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.video-mute-icon {
    width: 18px;
    height: 18px;
    fill: currentColor;
    pointer-events: none;
}

/* ------------------------------------------------------------------------------
 * 4. Buffering & Loading Indicator
 * ------------------------------------------------------------------------------ */
.video-buffering-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-top-color: var(--accent);
    animation: videoSpin 0.8s linear infinite;
    z-index: 4;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--duration-fast);
}

.photo-card-frame.is-buffering .video-buffering-indicator {
    opacity: 1;
}

@keyframes videoSpin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* ------------------------------------------------------------------------------
 * 5. Manual Play Trigger Overlay (For Low-Power & Reduced-Motion Modes)
 * ------------------------------------------------------------------------------ */
.video-manual-play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 52px;
    height: 52px;
    min-width: 44px;
    min-height: 44px;
    border-radius: 50%;
    background: rgba(8, 9, 12, 0.8);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 5;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: transform var(--duration-fast), border-color var(--duration-fast);
}

.video-manual-play-overlay:hover {
    transform: translate(-50%, -50%) scale(1.1);
    border-color: var(--accent);
}

.video-manual-play-overlay svg {
    width: 22px;
    height: 22px;
    margin-left: 2px;
    fill: currentColor;
}

/* Show play button when manual play is required */
.photo-card-frame.requires-manual-play .video-manual-play-overlay {
    display: inline-flex;
}

/* ------------------------------------------------------------------------------
 * 6. Accessibility & Reduced Motion Handling
 * ------------------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
    .video-motion-beacon {
        animation: none;
        opacity: 0.8;
    }

    /* Force static image presentation by default under reduced-motion */
    .photo-card-frame.reduced-motion-active .gallery-video {
        opacity: 0 !important;
    }

    .photo-card-frame.reduced-motion-active .video-manual-play-overlay {
        display: inline-flex;
    }
}

/* ------------------------------------------------------------------------------
 * 7. Mobile-First Responsive Breakpoints (< 768px, < 480px, < 380px)
 * ------------------------------------------------------------------------------ */
@media (max-width: 768px) {
    .video-motion-badge {
        top: var(--space-2);
        right: var(--space-2);
        padding: 3px 7px;
        font-size: 9px;
    }

    .video-mute-btn {
        bottom: var(--space-2);
        right: var(--space-2);
        opacity: 0.85; /* Always slightly visible on mobile touchscreens without hover */
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 480px) {
    .video-mute-btn {
        width: 44px;
        height: 44px; /* Strict 44px tap target preserved */
    }
}