style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border: 0;
    outline: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    height: 100vh;
    background-color: #ccc;
    overflow: hidden;
}

canvas {
    background-color: hsl(0 0% 10%);
}

.dialog {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0.9;
    backdrop-filter: blur(10px);
}
form {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background-color: hsl(0 0% 90%);
    padding: 10px 20px;
    border-radius: 5px;
    box-shadow: 0 3px 5px 0 hsl(0 0% 0% / 30%);
    width: 95%;
    max-width: 400px;
}

input {
    padding: 5px 10px;
    border-radius: 5px;
    background-color: hsl(0 0% 100%);
}

form label,
form button {
    margin-top: 10px;
}

form button,
div.cancel,
div.delete {
    background-color: hsl(0 0% 100%);
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    font-size: 0.8rem;
    text-align: center;
}

input[type='checkbox'] {
    margin-left: 5px;
}

form button:hover,
div.cancel:hover,
div.delete:hover {
    background-color: hsl(0 0% 85%);
}

button.run,
button.clear,
body > h1 {
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    font-size: 1.3rem;
}

button.clear {
    top: 70px;
}

body > h1 {
    color: white;
    top: 200px;
    font-size: 2rem;
    pointer-events: none;
    text-align: center;
}