:root {
  --bg: #0a0a0f;
  --panel: #111116;
  --neon-green: #00ff41;
  --neon-blue: #00d4ff;
  --neon-magenta: #ff00ff;
  --neon-gold: #ffaa00;
  --neon-cyan: #00ffff;
  --text: #a0a0b0;
  --border: #222230;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: "Courier New", Courier, monospace;
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 380px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  flex-shrink: 0;
}
h1 {
  display: flex;
  justify-content: space-between;
}
h1 a {
  text-transform: none;
  font-size: 0.8em;
  color: white;
  float: right;
  font-family: sans-serif;
  text-decoration: none;
}

h1, h2 {
  letter-spacing: 2px;
  margin: 0 0 5px 0;
}
h1 { color: var(--neon-blue); font-size: 1.2rem; }
h2 { font-size: 1.1rem; }
.title-img { color: var(--neon-magenta); }
.title-mask { color: var(--neon-gold); }
.title-qr { color: var(--neon-cyan); }

.control-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: rgba(255,255,255,0.02);
  padding: 10px;
  border: 1px solid var(--border);
}

.row { display: flex; gap: 10px; align-items: center; }
.row > * { flex: 1; }

label {
  font-size: 0.75rem;
  color: var(--neon-green);
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.lbl-accent { color: var(--neon-blue); }

select, input[type="text"], input[type="number"], input[type="file"] {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px;
  font-family: inherit;
  outline: none;
  width: 100%;
  box-sizing: border-box;
}

input[type="range"] { width: 100%; }
#panel-stencil input[type="range"] { accent-color: var(--neon-magenta); }
#panel-qr-stencil input[type="range"] { accent-color: var(--neon-cyan); }

input[type="checkbox"] { width: 16px; height: 16px; margin: 0; }
#panel-stencil input[type="checkbox"] { accent-color: var(--neon-magenta); }
#panel-qr-stencil input[type="checkbox"] { accent-color: var(--neon-cyan); }

select:focus, input:focus { border-color: var(--neon-blue); }

button {
  background: transparent;
  border: 1px solid var(--neon-green);
  color: var(--neon-green);
  padding: 10px;
  cursor: pointer;
  font-family: inherit;
  text-transform: uppercase;
  transition: all 0.2s;
  margin-top: 5px;
}
button:hover { background: rgba(0, 255, 65, 0.1); box-shadow: 0 0 10px rgba(0, 255, 65, 0.2); }

.btn-special { border-color: var(--neon-magenta); color: var(--neon-magenta); }
.btn-special:hover { background: rgba(255, 0, 255, 0.1); box-shadow: 0 0 10px rgba(255, 0, 255, 0.2); }

.btn-mask { border-color: var(--neon-gold); color: var(--neon-gold); }
.btn-mask:hover { background: rgba(255, 170, 0, 0.1); box-shadow: 0 0 10px rgba(255, 170, 0, 0.2); }

.btn-qr { border-color: var(--neon-cyan); color: var(--neon-cyan); }
.btn-qr:hover { background: rgba(0, 255, 255, 0.1); box-shadow: 0 0 10px rgba(0, 255, 255, 0.2); }

.btn-neutral { border-color: var(--text); color: var(--text); }
.btn-neutral:hover { background: rgba(255, 255, 255, 0.05); }

.btn-download { border-color: var(--neon-blue); color: var(--neon-blue); }
.btn-download:hover { background: rgba(0, 212, 255, 0.1); box-shadow: 0 0 10px rgba(0, 212, 255, 0.2); }

#btn-whiteout { border-color: #ffffff; color: #ffffff; }
#btn-whiteout:hover { background: rgba(255, 255, 255, 0.1); box-shadow: 0 0 10px rgba(255, 255, 255, 0.2); }

.legend { font-size: 0.75rem; margin-top: auto; border-top: 1px solid var(--border); padding-top: 20px; }
.legend-item { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.swatch { width: 12px; height: 12px; }

#canvas-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
canvas { image-rendering: pixelated; }

#qr-canvas { z-index: 1; }
#stencil-canvas {
  position: absolute;
  z-index: 2;
  pointer-events: none;
  display: none;
  background: black;
  opacity: 0.8;
}

#panel-stencil, #panel-mask, #panel-qr-stencil { display: none; }