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

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 940px;
  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; }

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

.views { display: flex; gap: 24px; flex-wrap: wrap; }
.views[hidden] { display: none; }
.col { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.col h2 { margin: 0; font-size: 0.85rem; color: var(--dim); font-weight: normal; letter-spacing: 1px; }

canvas {
  image-rendering: pixelated;
  border-radius: 6px;
  background: #0f1119;
  border: 1px solid #2c3047;
  flex-shrink: 0;
  max-width: 100%;
}
#loss-canvas { border: 1px solid #2c3047; }

.controls { flex: 1; min-width: 260px; display: flex; flex-direction: column; gap: 12px; }

button, select {
  background: #262a40;
  color: var(--text);
  border: 1px solid #3a3f5c;
  border-radius: 6px;
  padding: 7px 12px;
  font: inherit;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.big { font-size: 1.05rem; padding: 10px 14px; }
button.big.active { background: var(--accent); color: #0f1119; border-color: var(--accent); }
#btn-up, #btn-down { font-size: 1.2rem; padding: 8px 20px; user-select: none; touch-action: none; }

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

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