html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: black;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overscroll-behavior: none; /* Prevent pull-to-refresh and overscroll glow */
    touch-action: none; /* Disable all browser handling of gestures like pinch, zoom, and swipe-to-reload */
}

/* Background image rotation and blur */
#background-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 150vmax; /* large enough to cover the screen when rotating */
    height: 150vmax;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

#background-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(40px);
    animation: rotate 60s linear infinite;
    opacity: 0.75; /* Brighter background */
    will-change: transform;
    transform: translateZ(0); /* Cache the blurred image on the GPU */
}

@keyframes rotate {
    from { transform: rotate(0deg) translateZ(0); }
    to { transform: rotate(360deg) translateZ(0); }
}

/* Overlay to darken background */
#overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 2;
}

/* Main Content Layout */
#content-container {
    position: absolute;
    z-index: 3;
    display: flex;
    bottom: 30px;
    left: 30px;
    right: 30px;
    align-items: center;
}

#album-art-border {
    width: 165px;
    height: 165px;
    border-radius: 16px;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.2);
    flex-shrink: 0;
}

#album-art {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#text-container {
    margin-left: 25px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex-grow: 1;
    overflow: hidden;
}

.marquee-container {
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    width: 100%;
}

#title-container {
    height: 65px;
}

#artist-container {
    height: 45px;
    margin-top: 5px;
}

.marquee-wrapper {
    display: inline-block;
    will-change: transform; /* Hardware Acceleration */
}

.marquee-text {
    color: white;
    font-size: 48px;
    font-weight: bold;
    display: inline-block;
    padding-right: 60px; /* same as gap in WPF */
}

.marquee-text-small {
    color: #DDDDDD;
    font-size: 30px;
    display: inline-block;
    padding-right: 60px; /* same as gap in WPF */
}

/* Portrait rule overrides */
@media screen and (max-aspect-ratio: 3/4) {
    #content-container {
        flex-direction: column;
        justify-content: center;
        align-items: stretch;
        top: 30px; /* Center layout in portrait */
        bottom: auto;
        height: calc(100% - 60px);
    }

    #album-art-border {
        width: min(calc(100vw - 60px), calc(100vh - 200px));
        height: min(calc(100vw - 60px), calc(100vh - 200px));
        margin: 0 auto 20px auto;
        border-radius: 20px;
    }

    #text-container {
        margin-left: 0;
        text-align: left;
        flex-grow: 0;
    }

    .marquee-text, .marquee-text-small {
         /* Remove padding on single un-scrolled items in portrait for true centering, JS handles scrolled state */
    }
}

/* Scrolling animation classes added by JS */
.scroll-animation {
    animation: scroll-left var(--scroll-duration, 5s) linear infinite;
    /* pause for 5s initially and before repeating - simulated loosely by CSS or handled tightly by JS if needed */
}

@keyframes scroll-left {
    from { transform: translateX(0); }
    to { transform: translateX(calc(-50%)); /* Assumes the wrapper is doubled in JS */ }
}

/* Login overlay */
#login-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.9);
    z-index: 10;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
}

#login-button {
    background-color: #1DB954;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: bold;
    margin-top: 20px;
    transition: transform 0.1s;
}

#login-button:hover {
    background-color: #1ed760;
    transform: scale(1.05);
}

/* Swipe transition overlay */
#swipe-transition-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: black;
    z-index: 5; /* Above content, below login overlay */
    opacity: 0;
    pointer-events: none; /* Let touches pass through */
    transform: translateX(100%); /* start offscreen */
}

/* Status Popup */
#status-popup {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    min-width: 150px; min-height: 150px;
    padding: 30px;
    box-sizing: border-box;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 24px;
    z-index: 20;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
}
#status-popup svg {
    width: 80px; height: 80px;
    fill: #000;
}