:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at 20% 10%, #1e293b, #0b1020 60%, #030712);
  color: #e5e7eb;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 14px;
  padding: 14px;
}

.panel {
  background: rgba(10, 16, 35, 0.85);
  border: 1px solid #334155;
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

h1 {
  margin: 0;
  font-size: 1.2rem;
}

.subtitle,
.hint {
  margin: 0;
  color: #94a3b8;
  font-size: 0.9rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: #cbd5e1;
}

input,
select,
button {
  border-radius: 9px;
  border: 1px solid #475569;
  background: #0f172a;
  color: #e2e8f0;
  padding: 8px;
}

input[type='range'] {
  padding: 0;
}

.buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

button {
  background: #2563eb;
  border-color: #3b82f6;
  cursor: pointer;
  font-weight: 600;
}

button:hover {
  filter: brightness(1.08);
}

button.ghost {
  background: transparent;
}

main {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid #334155;
  background: #020617;
}

canvas {
  display: block;
  width: 100%;
  height: calc(100vh - 30px);
}

@media (max-width: 960px) {
  .app {
    grid-template-columns: 1fr;
  }

  canvas {
    height: 70vh;
  }
}