input[type='range']{
    width:80%;
}
main {
    margin: 0;
    display: flex;
    flex-flow: row wrap;
    justify-content: space-around;
}
body{
    text-align: center;
}
#cont{
    width: 79vmin;
    height: 79vmin;
}
canvas {
    width: inherit;
    height: inherit;
    image-rendering: crisp-edges;
}
h1{padding: 0;}
p {
    padding: 0;
    margin: 0 auto;
}
#controls {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    min-height: 40vh;
    padding: 10px;
    gap:2em;
    margin-top: 2em;
}
.control {
    margin: 0 auto;
    width:100%;
    user-select: none;
}
input.colour {
    margin: auto;
    height: 100%;
    width:3em;
}
div.control.start {
    --clr1: seagreen;
    margin-inline: auto;
    width: 50px;
    height: 50px;
    display: grid;
    padding: 0px;
    transition: transform 0.4s linear;
}
button.start {
    background: radial-gradient(blue, var(--clr1));
    border: none;
    border-radius: 50%;
    height: 40px;
    width: 40px;
    color: aquamarine;
    display: block;
    grid-area: pile;
}
.start.border {
    grid-area: pile;
    margin: 0px;
    padding: 0px;
    border: 1px solid var(--clr1);
    height: 40px;
    width: 40px;
    border-radius: 50%;
    animation: 4s infinite border;
    z-index: -1;
    background: radial-gradient(var(--clr1), rgba(0, 0, 0, 0.3));
}
div.start:hover {
    transform: scale(1.1);
}
@keyframes border {
    0%,
    100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.5);
    }
}