:root {
  --bg: #14172455;
  --panel: #1d2030;
  --text: #e6e8f2;
  --dim: #9aa0b8;
  --accent: #73eff7;
  --accent2: #ffcd75;
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 880px;
  padding: 24px 16px 48px;
  background: #0f1119;
  color: var(--text);
  font-family: ui-monospace, "Cascadia Code", "JetBrains Mono", Menlo, monospace;
  line-height: 1.55;
}

header h1 { margin: 0 0 4px; font-size: 1.6rem; letter-spacing: 0.5px; }
.tagline { color: var(--dim); margin-top: 0; }
.tagline em { color: var(--accent2); font-style: normal; }

.tabs { display: flex; gap: 8px; margin: 20px 0 12px; }
.tabs button {
  flex: 1;
  padding: 10px;
  background: var(--panel);
  border: 1px solid #2c3047;
  color: var(--dim);
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
}
.tabs button.active { color: var(--accent); border-color: var(--accent); }

.panel {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--panel);
  border: 1px solid #2c3047;
  border-radius: 12px;
  padding: 20px;
}

canvas {
  image-rendering: pixelated;
  border-radius: 6px;
  background: #fff;
  touch-action: none;
  flex-shrink: 0;
}
#draw-canvas { background: #1d2030; cursor: crosshair; }
#play-canvas { cursor: crosshair; }
#loss-canvas { background: transparent; border: 1px solid #2c3047; }

.controls { flex: 1; min-width: 240px; display: flex; flex-direction: column; gap: 12px; }

#palette { display: grid; grid-template-columns: repeat(8, 32px); gap: 6px; }
.swatch {
  width: 32px; height: 32px;
  border: 2px solid #0f1119;
  border-radius: 6px;
  cursor: pointer;
}
.swatch.selected, #btn-eraser.selected { outline: 2px solid var(--accent); }

button, .filebtn, select {
  background: #262a40;
  color: var(--text);
  border: 1px solid #3a3f5c;
  border-radius: 6px;
  padding: 7px 12px;
  font: inherit;
  cursor: pointer;
}
button:hover, .filebtn:hover { border-color: var(--accent); }
button.big { font-size: 1.1rem; padding: 12px; }
button.big.active { background: var(--accent); color: #0f1119; border-color: var(--accent); }

.filebtn { display: inline-block; }
.filebtn input { display: none; }

.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.label { color: var(--dim); }
.status { color: var(--accent2); min-height: 1.4em; margin: 0; }
.hint { color: var(--dim); font-size: 0.85rem; margin: 0; }

input[type="range"] { accent-color: var(--accent); }

footer { margin-top: 24px; color: var(--dim); font-size: 0.85rem; }
footer a { color: var(--accent); }
#backend { color: #566c86; }