:root {
    --bg-color: #000000;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

#overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 2s ease-in-out;
}

.play-icon {
    width: 60px;
    height: 60px;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.play-icon:hover {
    opacity: 1;
    transform: scale(1.05);
}

#app {
    position: relative;
    width: 100%;
    height: 100%;
}

.hidden {
    display: none !important;
    opacity: 0;
}

#visualizer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    filter: blur(1px) contrast(1.2);
}