body, html {
    height: 100%;
    margin: 0;
    font-family: sans-serif;
    background-color: #111;
    color: white;
    overflow: hidden;
}

.hidden {
    display: none !important;
}

#start-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
}

#start-screen h1 {
    font-size: 3em;
}

#start-screen p {
    font-size: 1.2em;
    margin-bottom: 2em;
}

#start-btn {
    padding: 1em 2em;
    font-size: 1.5em;
    cursor: pointer;
    border: 2px solid white;
    background-color: transparent;
    color: white;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
}

#start-btn:hover {
    background-color: white;
    color: #111;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
}

#background-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#timer {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 4em;
    font-weight: bold;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px 20px;
    border-radius: 10px;
    text-shadow: 2px 2px 4px #000000;
}

#rickroll-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
    background-color: black;
}

#rickroll-container iframe {
    width: 80vw;
    height: calc(80vw * 9 / 16); /* Maintain 16:9 aspect ratio */
}