:root {
    --card-primary-bg: linear-gradient(135deg, #3a7bd5, #00d2ff);
    --card-success-bg: linear-gradient(135deg, #11998e, #38ef7d);
    --card-warning-bg: linear-gradient(135deg, #f46b45, #eea849);
    --card-danger-bg: linear-gradient(135deg, #ff416c, #ff4b2b);
    --card-royal-bg: linear-gradient(135deg, #8e2de2, #4a00e0);
    --card-gold-bg: linear-gradient(135deg, #ffd700, #ffa500);
    --card-dark-bg: linear-gradient(135deg, #2c3e50, #4ca1af);
    --card-premium-bg: linear-gradient(135deg, #1a2980, #26d0ce);
    --card-coral-bg: linear-gradient(135deg, #ff7e5f, #feb47b);
    --card-ocean-bg: linear-gradient(135deg, #1cb5e0, #000851);
    --card-sunset-bg: linear-gradient(135deg, #ff5f6d, #ffc371);
    --card-emerald-bg: linear-gradient(135deg, #0ba360, #3cba92);
    --card-amethyst-bg: linear-gradient(135deg, #9d50bb, #6e48aa);
}