/* === THEME: DUOLINGO — Lime Green / Slate / Rose === */
:root {
  --bg-dark: #0a0a0c;
  --bg-card: #141418;
  --bg-callout: #101215;
  --text-primary: #e2e4e9;
  --text-secondary: #7d8290;
  --accent-primary: #84cc16;
  --accent-secondary: #64748b;
  --accent-tertiary: #f43f5e;
  --accent-green: #4a9e6b;
  --border-subtle: #1e2028;
  --highlight: #ecfccb;
  --hero-gradient: linear-gradient(145deg, #0a0a0c 0%, #0d1408 40%, #0a0a0c 100%);
  --hero-overlay:
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(132,204,22,0.015) 2px, rgba(132,204,22,0.015) 4px),
    radial-gradient(ellipse at 25% 55%, rgba(132,204,22,0.07) 0%, transparent 60%),
    radial-gradient(ellipse at 75% 30%, rgba(244,63,94,0.04) 0%, transparent 50%);
  --table-hover: rgba(132,204,22,0.04);
  --timeline-gradient: linear-gradient(to bottom, #84cc16, #64748b, #f43f5e);
}