:root {
  --bg-color: #fff;
  --fg-color: #888;
  --secondary-color: #ccc;
  --contrast-color: #000;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #000;
    --fg-color: #888;
    --secondary-color: #333;
    --contrast-color: #fff;
  }
}

html {
  background-color: var(--bg-color);
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: sans-serif;
  color: var(--fg-color);
}

#image {
  width: 300px;
  height: auto;
  border-radius: 5px;
  --color-1: var(--fg-color);
  --color-2: var(--secondary-color);
  --size: 4px;

  background-image: conic-gradient(
    var(--color-1) 25%,
    var(--color-2) 25%,
    var(--color-2) 50%,
    var(--color-1) 50%,
    var(--color-1) 75%,
    var(--color-2) 75%
  );
  background-size: calc(var(--size) * 2) calc(var(--size) * 2);
}
#image[src="placeholder.svg"] {
  cursor: pointer;
  border: 1px dashed var(--fg-color);
  background: transparent;
}
#image[src="placeholder.svg"].dragover {
  border-color: #007bff;
  color: #007bff;
}

#status {
  margin-top: 10px;
  width: 300px;
  font-size: 12pt;
}

#tools {
  display: flex;
  width: 300px;
  flex-direction: row;
  justify-content: space-between;
  margin-top: 5px;
}

#tools .left,
#tools .right {
  display: flex;
  flex-direction: row;
}

#transparent,
#mask,
#color {
  width: 20px;
  height: 20px;
  margin: 2px;
  border-radius: 50%;
}

#transparent {
  --color-1: var(--fg-color);
  --color-2: var(--secondary-color);
  --size: 4px;

  background-image: conic-gradient(
    var(--color-1) 25%,
    var(--color-2) 25%,
    var(--color-2) 50%,
    var(--color-1) 50%,
    var(--color-1) 75%,
    var(--color-2) 75%
  );
  background-size: calc(var(--size) * 2) calc(var(--size) * 2);
}

#mask {
  background-image: conic-gradient(
    #000 12.5%,
    #fff 12.5%,
    #fff 62.5%,
    #000 62.5%
  );
  border: 1px solid var(--contrast-color);
  box-sizing: border-box;
}

#color {
  position: relative;
  overflow: hidden;
  background-image: conic-gradient(in hsl longer hue, red 0 0);
}
#color #color_selected {
  position: absolute;
  top: 2px;
  bottom: 2px;
  left: 2px;
  right: 2px;
  border-radius: 50%;
  background-color: #ccc;
  border: 1.5px solid var(--bg-color);
}
#color input[type="color"] {
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  opacity: 0;
}

#downloadLink img {
  height: 20px;
  width: auto;
  flex-shrink: 0;
  cursor: pointer;
}

#downloadLink:hover img {
  opacity: 0.5;
}