/* Default theme: variables + small stylistic tweaks */
body.theme-default {
  --coverage-contour-color: #fff176;
  /* Core palette */
  --color-primary: #00e5ff;
  --color-secondary: #ff6b35;
  --color-bg-dark: #0a0e13;
  --color-bg-panel: #1e2328;
  --color-border: #3c4043;
  --color-text-light: #e8eaed;
  --color-text-muted: #9aa0a6;
  --color-body-bg: #0a0e13;
  --color-scrollbar-track: #1a1d21;
  --color-shadow: rgba(0,0,0,0.6);
  --color-shadow-heavy: rgba(0,0,0,0.8);
  --color-overlay: rgba(0,0,0,0.3);
  --color-panel-overlay: rgba(0,0,0,0.2);
  --color-tooltip-bg: rgba(30, 35, 40, 0.95);

  /* Glows, shadows, text effects */
  --color-primary-glow-60: rgba(0, 229, 255, 0.4);
  --color-primary-glow-50: rgba(0, 229, 255, 0.3);
  --color-primary-glow-30: rgba(0, 229, 255, 0.2);
  --color-primary-glow-20: rgba(0, 229, 255, 0.1);
  --color-secondary-glow-60: rgba(255, 107, 53, 0.4);
  --color-secondary-glow-50: rgba(255, 107, 53, 0.3);
  --color-secondary-glow-30: rgba(255, 107, 53, 0.2);
  --color-secondary-glow-20: rgba(255, 107, 53, 0.1);
  --text-shadow-primary: 0 0 8px rgba(0, 229, 255, 0.3);
  --text-shadow-secondary: 0 0 8px rgba(255, 107, 53, 0.3);
  --box-shadow-glow: 0 0 20px rgba(0, 229, 255, 0.2);
  --box-shadow-heavy: 0 8px 32px rgba(0,0,0,0.6);

  /* Radii + transitions */
  --border-radius-sm: 6px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --transition-speed: 0.3s;

  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --hud-font: 16px 'Inter', sans-serif;

  /* Canvas/Map/HUD/Receiver variables */
  --canvas-bg-color: #0f1419;
  /* keep default padding from variables.css unless overridden */
  --map-stroke-color: #00e5ff;
  --map-shadow-color: #00e5ff;
  --receiver-fill-color: #ff6b35;
  --receiver-shadow-color: #ff6b35;
  --hud-stroke-color: #e8eaed;
  --hud-fill-color: #e8eaed;
  --hud-shadow-color: #e8eaed;
}

.theme-default .sidebar-header h3 {
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
}