:root {
  /* Grays - Adapted from Blueprint */
  --gray-100: #E0E0E0;
  --gray-200: #AAAAAA;
  --gray-300: #666666;
  --gray-400: #363636;
  --gray-500: #242424;
  --gray-600: #121212;
  --gray-700: #080808;

  /* Accents - Retro Green */
  --accent-100: #6edb58;
  --accent-200: #38624D;

  /* Typography */
  --font-family-retro: 'VT323', monospace;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
}

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

body {
  font-family: var(--font-family-retro);
  font-size: 1.25rem; /* Larger base size for pixel font */
  color: var(--text-primary);
  background: var(--gray-700);
  background-image: radial-gradient(var(--gray-600) 15%, transparent 16%), radial-gradient(var(--gray-600) 15%, transparent 16%);
  background-size: 20px 20px;
  background-position: 0 0, 10px 10px;
  color: var(--gray-100);
  height: 100vh;
  overflow: hidden;
}

h1 {
  font-size: 2.5rem;
  color: var(--accent-100);
  text-shadow: 2px 2px 0px #000;
  margin-bottom: var(--spacing-sm);
  text-align: center;
  letter-spacing: 2px;
}

h3 {
  font-size: 1.5rem;
  color: var(--gray-200);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  border-bottom: 2px solid var(--gray-500);
}

.container {
  display: flex;
  flex-direction: row;
  width: 100vw;
  height: 100vh;
  padding: 16px;
  gap: 16px;
}

/* Sidebar */
.sidebar {
  width: 20%;
  min-width: 280px;
  background-color: var(--gray-600);
  border: 4px solid var(--gray-400);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  overflow-y: auto;
  box-shadow: 4px 4px 0px rgba(0,0,0,0.5);
}

.main {
  width: 80%;
  background-color: var(--gray-700);
  border: 4px solid var(--gray-400);
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: inset 0 0 50px rgba(0,0,0,0.5);
}

/* Controls */
label {
  display: block;
  font-size: 1.1rem;
  color: var(--gray-200);
  margin-top: 8px;
}

.data {
  color: var(--accent-100);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-100);
  margin: 8px 0;
  cursor: pointer;
}

input[type="file"] {
  display: none;
}

.btn {
  font-family: var(--font-family-retro);
  background-color: var(--accent-200);
  color: var(--gray-100);
  padding: 12px;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: 0 4px 0 var(--gray-500);
  transition: transform 0.1s, box-shadow 0.1s;
  width: 100%;
  text-align: center;
  margin-top: 8px;
}

.btn:active {
  transform: translateY(4px);
  box-shadow: 0 0 0 var(--gray-500);
}

.btn:hover {
  background-color: var(--accent-100);
  color: var(--gray-700);
}

.small--btn {
  width: auto;
  padding: 8px 16px;
  font-size: 1.1rem;
  display: inline-block;
}

/* Palette Swatches */
.palette-container {
  display: flex;
  gap: 8px;
  margin: 8px 0;
  height: 40px;
  background: var(--gray-500);
  padding: 4px;
  border: 2px solid var(--gray-400);
}

.swatch-wrapper {
  flex: 1;
  position: relative;
  height: 100%;
}

.color-input {
  width: 100%;
  height: 100%;
  border: none;
  padding: 0;
  cursor: pointer;
  opacity: 0; /* Hide default input, show wrapper bg */
  position: absolute;
  top: 0;
  left: 0;
}

.swatch-display {
  width: 100%;
  height: 100%;
  border: 2px solid var(--gray-700);
  pointer-events: none;
}

/* Canvas */
canvas {
  max-width: 95%;
  max-height: 95%;
  /* Critical for 8-bit look: crisp edges on zoom */
  image-rendering: pixelated; 
  box-shadow: 0 0 20px rgba(0,0,0,0.8);
  border: 2px solid var(--gray-500);
}

.credits {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(0,0,0,0.7);
  padding: 4px 12px;
  color: var(--gray-200);
  font-size: 1rem;
  border-radius: 4px;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;
}

.loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent-200);
  color: white;
  padding: 20px;
  font-size: 2rem;
  box-shadow: 8px 8px 0 rgba(0,0,0,0.5);
}

.hidden {
  display: none;
}

.spacer {
    flex-grow: 1;
}