*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  background: #f8fafc;
  color: #0f1c2e;
  -webkit-font-smoothing: antialiased;
}
#root { min-height: 100vh; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.4} }

/* TWEAKS PANEL */
#tweaks-panel {
  display: none;
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 20px;
  width: 260px;
  box-shadow: 0 8px 32px rgba(0,0,0,.12);
  z-index: 9999;
  font-size: 13px;
}
#tweaks-panel.visible { display: block; }
#tweaks-panel h4 { font-size: 14px; font-weight: 700; margin-bottom: 14px; color: #0f1c2e; }
#tweaks-panel label { display: block; margin-bottom: 4px; color: #64748b; font-size: 12px; }
#tweaks-panel select,
#tweaks-panel input[type=color] {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 12px;
  margin-bottom: 12px;
}
#tweaks-panel input[type=color] { height: 34px; padding: 2px; }