:root {
    --primary-color: #0F0F0F;
    --theme-color: #9d0ac2;

    --page-width: 1000px;
    --base-padding: 16px;
}

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

body {
    background-color: var(--primary-color);
    max-width: calc(var(--page-width) + 2 * var(--base-padding));
    padding: calc(var(--base-padding) * 3) var(--base-padding);
    margin: 0 auto;

    color: var(--theme-color);
    font-family: 'Syne', sans-serif;
    font-size: 1rem;

    display: flex;
    flex-direction: column;
    gap: calc(var(--base-padding) * 2);
}

a {
    color: var(--theme-color);
}

#heading {
    font-weight: 800;
    font-size: 4rem;

    width: 100%;
    margin: 0 0 calc(var(--base-padding) * 1.25) 0;

    overflow: hidden;
}

#heading span.stretch {
    display: inline-block;
    transform-origin: left center;
}

#uploadbox,
button,
.button {
    font-family: 'Syne', sans-serif;
    font-weight: 600;
    font-size: 1.2rem;

    border: 1px ridge var(--theme-color);
    color: var(--theme-color);
    text-decoration: none;
    text-align: center;

    padding: var(--base-padding);
    cursor: pointer;
    transition: background 0.25s ease;
}

#uploadbox {
    display: flex;
    justify-content: space-around;
    gap: var(--base-padding);
    align-items: center;

    margin: 0 2px;
}

button {
    background-color: var(--primary-color);
    margin: 0 2px;
}

#upload {
    display: none;
}

#controls {
    display: flex;
    justify-content: center;
    gap: var(--base-padding);
}

#controls > * {
    flex: 1;
}

.inline {
    display: flex;
    align-items: center;
    gap: var(--base-padding);
}

.space-between {
    justify-content: space-between;
}

#uploadbox:hover,
#uploadbox:active,
button:hover,
button:active,
.button:hover,
.button:active {
    background-color: var(--theme-color);
    color: var(--primary-color);
}

canvas {
    max-width: 1024px;
    width: 100%;
    display: block;
    margin: 0 auto;
    aspect-ratio: 1;

    border: 1px solid var(--theme-color);
}