:root {
  --bg: #1a1a1f;
  --fg: #e8e8ec;
  --accent: #6cf;
  --panel: #26262e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    sans-serif;
  background: var(--bg);
  color: var(--fg);
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
}

main {
  width: 100%;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.blurb {
  margin: 0 0 1rem;
  color: #b0b0ba;
  font-size: 0.9rem;
  line-height: 1.5;
}

canvas {
  display: block;
  max-width: 100%;
  background: #000;
  border-radius: 6px;
  cursor: crosshair;
  image-rendering: pixelated;
}

.controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  cursor: pointer;
}

button {
  background: var(--accent);
  color: #06121a;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.1);
}

.status {
  margin-left: auto;
  font-weight: 600;
  color: var(--accent);
}

kbd {
  background: var(--panel);
  border-radius: 3px;
  padding: 0 0.3rem;
  border: 1px solid #444;
  font-size: 0.85em;
}

/* --- Control panel (knobs galore) --- */

.panel-container {
  margin-top: 1.25rem;
}

.panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}

.knob-group {
  background: var(--panel);
  border: 1px solid #3a3a44;
  border-radius: 6px;
  padding: 0.5rem 0.75rem 0.75rem;
  margin: 0;
}

.knob-group legend {
  padding: 0 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.knob {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.4rem 0.5rem;
  margin: 0.35rem 0;
  font-size: 0.8rem;
}

.knob-label {
  color: #c8c8d2;
}

.knob-value {
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-size: 0.75rem;
  min-width: 3ch;
  text-align: right;
}

.knob input[type='range'] {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--accent);
}

.knob select {
  grid-column: 1 / -1;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid #444;
  border-radius: 4px;
  padding: 0.25rem;
}

.panel-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}
/* Canvas wrapper + drag-to-resize handle. */
.canvas-wrap {
  position: relative;
  display: inline-block;
  max-width: 100%;
}
.resize-handle {
  position: absolute;
  right: -4px;
  bottom: -4px;
  width: 16px;
  height: 16px;
  background: var(--accent);
  border: 2px solid var(--bg);
  border-radius: 3px;
  cursor: nwse-resize;
  touch-action: none;
}
.res-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
}
.res-input {
  width: 5rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid #444;
  border-radius: 4px;
  padding: 0.25rem;
}
.knob input:disabled {
  opacity: 0.4;
}

/* Immersive fullscreen: center canvas on black, hide chrome. */
canvas:fullscreen {
  width: 100vw;
  height: 100vh;
  max-width: none;
  object-fit: contain;
  background: #000;
  image-rendering: pixelated;
}

canvas:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  background: #000;
}