:root[data-theme="dark"] {
  --bg: #1a1a1a;
  --surface: #2c2c2c;
  --text: #e0e0e0;
  --text-secondary: #b0b0b0;
  --border: rgba(255, 255, 255, 0.1);
  --glass: rgba(44, 44, 44, 0.8);
  --primary: #388bfd;
  --secondary: #529dff;
  --accent: #388bfd;
  --accent-2: #50fa7b;
}

:root[data-theme="light"] {
  --bg: #f5f5f5;
  --surface: #ffffff;
  --text: #333333;
  --text-secondary: #666666;
  --border: rgba(0, 0, 0, 0.1);
  --glass: rgba(255, 255, 255, 0.8);
  --primary: #0a66c2;
  --secondary: #004182;
  --accent: #0a66c2;
  --accent-2: #00ebc7;
}

/* Default variables (match dark to avoid blue flash before theme applies) */
:root {
  --bg: #1a1a1a;
  --surface: #2c2c2c;
  --text: #e0e0e0;
  --text-secondary: #b0b0b0;
  --border: rgba(255, 255, 255, 0.1);
  --glass: rgba(44, 44, 44, 0.8);
  --primary: #388bfd;
  --secondary: #529dff;
  --accent: #388bfd;
  --accent-2: #50fa7b;
  --content-scale: 1;
  --font-game: "Trebuchet MS", "Segoe UI", system-ui, -apple-system, "Inter", sans-serif;
}

/* Playful UI mode: brighter primary and playful font */
:root.playful {
  --primary: #ff7ad1;
  --secondary: #ff9edf;
  --accent: #ff7ad1;
  --font-game: "Comic Sans MS", "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
}

/* Global application surfaces */
html, body { background: var(--bg); color: var(--text); }
.mobile-container { background: var(--surface); }
.app-header { background: var(--glass); border-bottom: 1px solid var(--border); }
.hamburger-menu-button { border-color: var(--border); }