/* Fixed Vertical Navigation */
    .nav-controls {
        position: absolute;
        right: 25px;
        top: 50%;
        transform: translateY(-50%);
        display: flex;
        flex-direction: column; 
        gap: 15px;
        z-index: 10002;
    }

    .nav-arrow {
        color: white;
        font-size: 24px;
        cursor: pointer;
        background: rgba(255, 255, 255, 0.15);
        backdrop-filter: blur(5px);
        width: 45px;
        height: 45px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        transition: all 0.2s ease;
        border: 1px solid rgba(255,255,255,0.2);
    }

    .nav-arrow:hover {
        background: rgba(255, 255, 255, 0.3);
        transform: scale(1.1);
    }

    /* Core Styles */
    .reel-overlay { display: none; 
        position: fixed; 
        top: 0; 
        left: 0; 
        width: 100vw; 
        height: 100dvh; /* Dynamic height for mobile browsers */
        background: rgba(0,0,0,0.9); 
        z-index: 9999; 
        justify-content: center; 
        align-items: center;
        background: radial-gradient(circle, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.95) 100%); }
    .reel-container {
        position: relative; 
        /* On mobile: fill screen. On desktop: 9/16 ratio */
        width: 100%; 
        height: 100%; 
        max-width: 450px; /* Standard Reel/TikTok width */
        max-height: 800px; /* Standard Reel/TikTok height */
        background: #000; 
        overflow: hidden;}
    video { width: 100%; height: 100%; object-fit: cover; }
    .reel-caption { position: absolute; bottom: 35px; left: 15px; color: white; z-index: 10; font-family: inherit; }
    .close-x { position: absolute; top: 25px; right: 25px; color: white; font-size: 35px; cursor: pointer; z-index: 10001; }
    .reel-bottom-wrapper { position: absolute; bottom: 0; left: 0; width: 100%; background: linear-gradient(transparent, rgba(0,0,0,0.8)); padding-bottom: 10px; }
    .progress-container2 { width: 100%; height: 3px; background: rgba(255,255,255,0.2); }
    .progress-bar2 { height: 100%; background: #fff; width: 0%; transition: width 0.1s linear; }
    .btn-watch { background: transparent; color: #fff; border: 2px solid #fff; padding: 12px 24px; border-radius: 8px; font-weight: 900; cursor: pointer; }

    @media (max-width: 500px) {
        .nav-controls { right: 10px; }
        .nav-arrow { width: 40px; height: 40px; }
        .reel-container {
            max-width: 100%;
            max-height: 100%;
            border-radius: 0;
        }
        .reel-overlay {
            background: #000; /* Pure black on mobile for immersion */
        }
    }