[data-theme="dark"] {
  /* Backgrounds */
  --bg-primary:   #0f1923;
  --bg-secondary: #1a2733;
  --bg-table:     #0d1820;
  --bg-overlay:   rgba(15, 25, 35, 0.88);
  --bg-image:     radial-gradient(ellipse at center, #162032 0%, #0d1820 70%);

  /* Text */
  --text-primary:   #e2e8f0;
  --text-secondary: #64748b;

  /* Accent — spades blue */
  --accent:      #4a90d9;
  --accent-glow: rgba(74, 144, 217, 0.3);

  /* Borders & surfaces */
  --border:    #243044;
  --btn-bg:    rgba(36, 48, 68, 0.7);
  --btn-hover: rgba(50, 65, 90, 0.85);
  --panel-bg:  rgba(26, 39, 51, 0.85);
  --badge-bg:  rgba(36, 48, 68, 0.9);

  /* Card surfaces */
  --card-bg:           #ffffff;
  --card-border:       #d0d9e8;
  --card-shadow:       rgba(0, 0, 0, 0.25);
  --card-red:          #d32f2f;
  --card-black:        #1a1a2e;
  --card-back-bg:      #1e3a6e;
  --card-back-border:  #1a3560;
  --card-radius:       8px;

  /* Player accent colors */
  --p1-color: #4a90d9;   /* you — blue */
  --p2-color: #e57373;   /* right — red */
  --p3-color: #81c784;   /* partner — green */
  --p4-color: #ffb74d;   /* left — amber */
}