:root {
  /* Light surfaces (docs, email, badge on light hosts, print) */
  --ia-snow:            #F7F6F3;
  --ia-paper:           #FBFAF7;
  --ia-line:            #E0D9CE;
  --ia-line-strong:     #B9B0A2;
  --ia-ink:             #12171B;
  --ia-ink-soft:        #4A5359;
  --ia-stone:           #6B7479;

  /* Dark surfaces (default site theme) */
  --ia-night:           #0D1114;
  --ia-rock:            #131A20;
  --ia-rock-raised:     #1C262D;
  --ia-edge:            #232C33;
  --ia-edge-soft:       #1B2329;
  --ia-edge-strong:     #2C373F;
  --ia-text:            #EDEFF0;
  --ia-text-soft:       #A8B3BA;
  --ia-text-muted:      #7F8D97;

  /* Accent: alpenglow. Reserved for scores, primary CTAs, the badge. */
  --ia-alpenglow:       #FF7A45;  /* on dark */
  --ia-alpenglow-hover: #FF8F62;
  --ia-alpenglow-ink:   #B24F1E;  /* on light */
  --ia-alpenglow-deep:  #8E3D14;  /* light hover / pressed */
  --ia-alpenglow-lift:  #E8905A;  /* app icon + email on ink */
  --ia-alpenglow-wash:  #FCF6F1;  /* light rank-1 row */

  /* Functional secondaries. Never used as brand accents. */
  --ia-glacier:         #5FD3D0;  /* gains, up movement, secondary links on dark */
  --ia-ember:           #E27A8D;  /* drops, down movement */

  /* Type */
  --ia-font-ui:  "Public Sans", system-ui, -apple-system, sans-serif;
  --ia-font-num: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  /* Space, 4px base */
  --ia-s1: 4px;  --ia-s2: 8px;  --ia-s3: 12px; --ia-s4: 16px;
  --ia-s5: 24px; --ia-s6: 32px; --ia-s7: 48px; --ia-s8: 64px;

  /* Radius, borders, motion */
  --ia-r-sm: 5px; --ia-r-md: 6px; --ia-r-lg: 9px; --ia-r-xl: 12px;
  --ia-border: 1px;
  --ia-ease: cubic-bezier(.2,.7,.3,1);
  --ia-dur-fast: 180ms;
  --ia-dur-slow: 500ms;
  --ia-focus: 2px solid var(--ia-text);
  --ia-focus-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}