:root {
  --bg: #000;
  --fg: #fff;
  --muted: #e2e2e2;
  --accent: #0b7bdc;
  --border: #fff;

  --page-padding: 1rem;
  --panel-padding: 1rem;
  --panel-gap: 1rem;
  --canvas-gap: 1.5rem;

  --border-width: 1px;
  --border-radius: 0.3rem;

  --font-family: "Courier New", Courier, monospace;
  --font-size-base: 1rem;
  --font-size-small: 0.9rem;
  --font-size-heading: 1.6rem;
  --font-size-label: 0.95rem;
}

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

html, body {
  height: 100%;
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  overflow: hidden;
}

.page {
  height: 100%;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--page-padding);
}

.panel {
  width: 100%;
  height: 100%;
  border: var(--border-width) solid var(--border);
  padding: var(--panel-padding);
  display: flex;
  flex-direction: column;
  gap: var(--panel-gap);
  min-height: 0;
  min-width: 0;
}

.header-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.header-controls h1 {
  margin: 0;
  white-space: nowrap;
}

#loadImageBtn {
  background: transparent;
  color: var(--fg);
  border: 1.5px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: var(--font-size-base);
}

#loadImageBtn:hover {
  background: var(--fg);
  color: var(--bg);
}

#controls {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  font-size: var(--font-size-base);
}

.control-left,
.control-right {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

label {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  color: var(--fg);
  font-size: var(--font-size-base);
  white-space: nowrap;
}

label > span {
  display: inline-block;
  width: 3ch;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 12rem;
  cursor: pointer;
}

input[type="number"] {
  background: transparent;
  color: var(--fg);
  border: 1.5px solid var(--border);
  padding: 0.6rem 1rem;
  width: 7rem;
  font-family: inherit;
  font-size: var(--font-size-base);
  border-radius: var(--border-radius);
  text-align: right;
}

.canvas-wrap {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: var(--canvas-gap);
  padding: 1rem 0;
  overflow: hidden;
  min-height: 0;
  min-width: 0;
}

.canvas-box {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  align-items: stretch;
  width: 48%;
  height: 100%;
  box-sizing: border-box;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}

.canvas-label {
  font-size: var(--font-size-label);
  color: var(--muted);
}

.canvas {
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  border: var(--border-width) solid var(--border);
  background: #010101;
  display: block;
  image-rendering: pixelated;
  overflow: hidden;
}

.info {
  padding-top: 0.5rem;
  color: var(--muted);
  font-size: var(--font-size-small);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.small {
  color: var(--muted);
  font-size: var(--font-size-small);
}