:root,
body[data-participant-theme="winter"] {
  --participant-bg: #f5f8fc;
  --participant-bg-accent: rgba(150, 182, 211, 0.18);
  --participant-panel: rgba(255, 255, 255, 0.94);
  --participant-panel-soft: rgba(248, 251, 254, 0.96);
  --participant-ink: #223245;
  --participant-muted: #647487;
  --participant-line: #d8e2ec;
  --participant-line-strong: #c7d5e4;
  --participant-brand: #4977a6;
  --participant-brand-deep: #315c87;
  --participant-brand-soft: #eef4fa;
  --participant-shadow: 0 14px 30px rgba(31, 45, 61, 0.08);
}

body[data-participant-theme="spring"] {
  --participant-bg: #fbf8ea;
  --participant-bg-accent: rgba(233, 205, 120, 0.22);
  --participant-panel: rgba(255, 254, 247, 0.95);
  --participant-panel-soft: rgba(255, 252, 241, 0.97);
  --participant-ink: #4a4227;
  --participant-muted: #84755a;
  --participant-line: #eadfbb;
  --participant-line-strong: #ddcf9e;
  --participant-brand: #c5a33a;
  --participant-brand-deep: #94761e;
  --participant-brand-soft: #f8f0c8;
  --participant-shadow: 0 14px 30px rgba(116, 95, 37, 0.08);
}

body[data-participant-theme="summer"] {
  --participant-bg: #f1faf1;
  --participant-bg-accent: rgba(123, 205, 145, 0.22);
  --participant-panel: rgba(250, 255, 250, 0.95);
  --participant-panel-soft: rgba(243, 252, 244, 0.97);
  --participant-ink: #233b2d;
  --participant-muted: #5f7d68;
  --participant-line: #cfe4d3;
  --participant-line-strong: #bad6bf;
  --participant-brand: #4ea265;
  --participant-brand-deep: #2f7a48;
  --participant-brand-soft: #ddf1e1;
  --participant-shadow: 0 14px 30px rgba(33, 89, 53, 0.08);
}

body[data-participant-theme="autumn"] {
  --participant-bg: #fdf4ec;
  --participant-bg-accent: rgba(227, 147, 88, 0.2);
  --participant-panel: rgba(255, 251, 247, 0.95);
  --participant-panel-soft: rgba(255, 246, 240, 0.97);
  --participant-ink: #472e21;
  --participant-muted: #826555;
  --participant-line: #ecd3c3;
  --participant-line-strong: #dfc0ac;
  --participant-brand: #c97546;
  --participant-brand-deep: #9d5630;
  --participant-brand-soft: #f7e2d7;
  --participant-shadow: 0 14px 30px rgba(112, 61, 32, 0.08);
}