.preset.fluent_design {
  --font: 'Inter', 'Segoe UI', sans-serif;
  --accent: #0078D4; --accent-strong: #005a9e; --accent-on: #fff;
  --bg: rgba(243,243,243,0.95); --surface: rgba(255,255,255,0.78);
  --on-surface: #1B1B1B; --label-color: #5C5C5C;
  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 10px; --radius-btn: 4px;
  --pad-y: 9px; --pad-x: 12px;
  --shadow-form: 0 8px 16px rgba(0,0,0,0.14), 0 0 0 1px rgba(0,0,0,0.06);
  --input-border: 1px solid #c8c8c8;
  --input-shadow: inset 0 -1px 0 #5c5c5c;
  --gap-field: 12px;
  --btn-secondary-border: 1px solid #c8c8c8;
}
.preset.fluent_design .form-card { backdrop-filter: blur(20px); }