@keyframes move-twink-back {
    from {background-position:0 0;}
    to {background-position:-10000px 5000px;}
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

body, html {
    height: 100%;
    margin: 0;
    font-family: 'Arial', sans-serif;
    color: #ffffff;
    overflow: hidden;
}

.stars, .twinkling {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.stars {
    background: #000 url('http://www.script-tutorials.com/demos/360/images/stars.png') repeat top center;
    z-index: -2;
}

.twinkling {
    background: transparent url('http://www.script-tutorials.com/demos/360/images/twinkling.png') repeat top center;
    z-index: -1;
    animation: move-twink-back 200s linear infinite;
}

.planets {
    position: absolute;
    width: 100%;
    height: 100%;
}

.planet {
    position: absolute;
    border-radius: 50%;
    animation: rotate linear infinite;
}

.planet1 {
    width: 100px;
    height: 100px;
    background: radial-gradient(circle at 30% 30%, #ffd700, #ffa500);
    top: 20%;
    left: 10%;
    animation-duration: 30s;
}

.planet2 {
    width: 60px;
    height: 60px;
    background: radial-gradient(circle at 30% 30%, #1e90ff, #4169e1);
    top: 60%;
    right: 20%;
    animation-duration: 20s;
}

.planet3 {
    width: 80px;
    height: 80px;
    background: radial-gradient(circle at 30% 30%, #32cd32, #228b22);
    bottom: 15%;
    left: 30%;
    animation-duration: 25s;
}

#passwordPrompt, #content {
    position: relative;
    z-index: 1;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
    text-align: center;
    max-width: 400px;
    margin: 50px auto;
}

input, button {
    display: block;
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: none;
    border-radius: 5px;
}

input {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

button {
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}

h1, h2 {
    color: #ffd700;
}

#content {
    display: none;
}