[data-theme="madison"] {
  --font-serif: "Source Serif 4", Georgia, serif;
  --font-sans: "Public Sans", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 0.375rem;
  --background: 60 9% 98%;
  --foreground: 60 4% 10%;
  --card: 0 0% 100%;
  --card-foreground: 60 4% 10%;
  --popover: 0 0% 100%;
  --popover-foreground: 60 4% 10%;
  /* PRIMARY = carbon ink (CTA). Madison oxblood is the supporting accent (--ring/links). */
  --primary: 60 4% 10%;
  --primary-foreground: 60 9% 98%;
  --secondary: 60 8% 95%;
  --secondary-foreground: 60 4% 10%;
  --muted: 60 8% 95%;
  --muted-foreground: 48 2% 41%;
  --accent: 60 8% 95%;
  --accent-foreground: 60 4% 10%;
  --destructive: 5 58% 44%;
  --destructive-foreground: 0 0% 100%;
  --border: 45 8% 90%;
  --input: 48 5% 82%;
  --ring: 5 40% 35%;
  /* Semantic roles (from tokens.ts) — Madison oxblood + feedback + data viz. */
  --brand: 5 40% 35%;
  --brand-soft: 5 35% 94%;
  --brand-text: 5 41% 30%;
  --success: 150 53% 31%;
  --success-soft: 142 28% 92%;
  --success-text: 151 53% 25%;
  --warning: 38 69% 39%;
  --warning-soft: 41 61% 92%;
  --warning-text: 38 70% 29%;
  --danger: 5 58% 44%;
  --danger-soft: 7 56% 94%;
  --danger-text: 5 61% 35%;
  --info: 212 58% 44%;
  --info-soft: 212 59% 94%;
  --info-text: 211 58% 35%;
  --dataviz-primary: 48 5% 20%;
  --dataviz-support: 5 40% 35%;
  font-family: var(--font-sans);
}
[data-theme="madison"].dark {
  /* The Vault — blue-black canvas for hero + footer bands. */
  --background: 220 12% 5%;
  --foreground: 45 15% 95%;
  --card: 225 10% 8%;
  --card-foreground: 45 15% 95%;
  --popover: 225 10% 8%;
  --popover-foreground: 45 15% 95%;
  /* PRIMARY = inverted near-white CTA on vault black. Oxblood stays the accent. */
  --primary: 45 15% 95%;
  --primary-foreground: 220 12% 5%;
  --secondary: 225 7% 11%;
  --secondary-foreground: 45 15% 95%;
  --muted: 225 7% 11%;
  --muted-foreground: 50 3% 64%;
  --accent: 225 7% 11%;
  --accent-foreground: 45 15% 95%;
  --destructive: 6 62% 62%;
  --destructive-foreground: 0 0% 100%;
  --border: 228 6% 16%;
  --input: 230 6% 19%;
  --ring: 6 31% 47%;
  /* Semantic roles (dark) — Madison oxblood + feedback + data viz. */
  --brand: 6 31% 47%;
  --brand-soft: 4 27% 11%;
  --brand-text: 6 32% 64%;
  --success: 153 40% 50%;
  --success-soft: 151 37% 11%;
  --success-text: 152 49% 66%;
  --warning: 39 55% 53%;
  --warning-soft: 35 37% 12%;
  --warning-text: 40 60% 67%;
  --danger: 6 62% 62%;
  --danger-soft: 8 39% 12%;
  --danger-text: 7 71% 75%;
  --info: 212 58% 64%;
  --info-soft: 211 36% 14%;
  --info-text: 210 59% 76%;
  --dataviz-primary: 50 7% 84%;
  --dataviz-support: 6 31% 47%;
}