body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Roboto', sans-serif;
    background: black;
    overflow: hidden;
    color: #00bfff;
}

#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

#canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.container {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 40px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 15px;
    margin: 50px auto;
    max-width: 700px;
    box-shadow: 0 0 20px #00bfff, 0 0 40px #00bfff;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

input[type="text"] {
    width: 70%;
    padding: 12px;
    border: 2px solid #00bfff;
    background: black;
    color: #00bfff;
    font-size: 16px;
    border-radius: 6px;
}

button {
    padding: 12px 25px;
    margin-left: 10px;
    background: #00bfff;
    border: none;
    border-radius: 6px;
    color: black;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #0080ff;
}

#output {
    margin-top: 30px;
    font-size: 18px;
}

.graph {
    margin-top: 30px;
}