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

body{
    margin:0;
    background:#000;
    color:white;
    font-family:Arial, sans-serif;

    display:flex;
    flex-direction:column;
    align-items:center;

    min-height:100vh;

    overflow:auto;
}

/* UI header */
.container{
    text-align:center;
    margin:20px 0;
}

/* Title */
h1{
    font-size:40px;
    letter-spacing:2px;
    margin-bottom:10px;
    color:#00ffd5;
}

/* Controls */
.controls{
    position:sticky;
    top:0;
    background:#000;
    padding:10px;
    z-index:10;
}

/* Canvas */
canvas{
    border:2px solid #00ffd5;
    border-radius:12px;

    box-shadow:0 0 25px rgba(0,255,213,0.2);

    transition:0.3s;

    max-width:100%;
    height:auto;

    display:block;
}

canvas:hover{
    transform:scale(1.01);
    transform-origin:center;
}

/* Inputs */
input[type="range"]{
    width:250px;
    margin-top:20px;
    accent-color:#00ffd5;
}

/* Buttons + select */
button,select{
    background:#111;
    color:#00ffd5;

    border:1px solid #00ffd5;

    padding:10px 14px;
    border-radius:8px;

    cursor:pointer;
    font-size:14px;

    transition:0.3s;
}

button:hover,select:hover{
    background:#00ffd5;
    color:black;
}

/* optional glow effect */
button:hover{
    box-shadow:0 0 10px #00ffd5;
}