:root { font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; }
body { margin: 0; background: #f6f6f6; color: #111; }
.wrap { max-width: 820px; margin: 28px auto; padding: 0 16px; }

h1 { margin: 0 0 6px; }
.sub { margin: 0 0 18px; opacity: 0.75; }

.card { background: #fff; border: 1px solid #ddd; border-radius: 12px; padding: 16px; margin: 12px 0; }
.row { display: flex; gap: 12px; flex-wrap: wrap; margin: 12px 0; }

.btn { padding: 10px 12px; border-radius: 10px; border: 1px solid #111; background: #111; color: #fff; cursor: pointer; }
.btn.secondary { background: #fff; color: #111; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn.pressed {
  transform: translateY(1px);
  filter: brightness(0.95);
}

.field { display: grid; gap: 6px; font-size: 14px; }
select, input[type="range"] { padding: 8px; border-radius: 10px; border: 1px solid #ccc; }

canvas { width: 100%; height: auto; border: 1px dashed #bbb; border-radius: 12px; background: #fafafa; }

.info { margin: 10px 0 0; opacity: 0.8; font-size: 14px; }
.subtle { opacity: 0.6; }