:root {
  /* ─── Color Palette: Navy + Ember ─── */
  --ink: #0B1B33;
  --ink-light: #132844;
  --ink-lighter: #1C3555;
  --bone: #E2E8EF;
  --bone-dark: #C8D1DC;
  --hot: #EB1857;
  --hot-hover: #D1104A;
  --hot-light: rgba(235, 24, 87, 0.1);
  --blurple: #6E44FF;
  --blurple-bright: #8F70FF; /* on navy: #6E44FF goes muddy against --ink */
  --blurple-dark: #5A33E6; /* pressed state */
  --green: #31D895; /* semantic only: money moved, live, settled */
  --green-rgb: 49, 216, 149; /* for rgba(var(--green-rgb), a) */
  --paper: #F2EFE8;
  --paper-dark: #E8E4DB;
  --mute: #586175;
  --white: #FFFFFF;
  --black: #000000;

  /* Semantic colors */
  --bg-primary: var(--paper);
  --bg-dark: var(--ink);
  --bg-card: var(--white);
  --bg-card-alt: var(--bone);
  --text-primary: var(--ink);
  --text-secondary: var(--mute);
  --text-inverse: var(--white);
  --text-accent: var(--hot);
  --border-light: rgba(11, 27, 51, 0.08);
  --border-medium: rgba(11, 27, 51, 0.15);

  /* ─── Typography ─── */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font sizes — fluid scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.775rem + 0.2vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);
  --text-md: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.9vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.7rem + 2.75vw, 3.25rem);
  --text-5xl: clamp(2.75rem, 2rem + 3.75vw, 4.25rem);
  --text-6xl: clamp(3.25rem, 2.2rem + 5.25vw, 5.5rem);
  --text-7xl: clamp(3.75rem, 2.5rem + 6.25vw, 7rem);

  /* Font weights */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Line heights */
  --leading-tight: 1.05;
  --leading-snug: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;

  /* Letter spacing */
  --tracking-tight: -0.03em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
  --tracking-wider: 0.06em;
  --tracking-widest: 0.1em;

  /* ─── Spacing ─── */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-section: clamp(4rem, 3rem + 4vw, 6.5rem);
  --space-section-lg: clamp(5rem, 4rem + 5vw, 8.5rem);

  /* ─── Layout ─── */
  --container-max: 1280px;
  --container-wide: 1440px;
  --container-narrow: 720px;
  --container-pad: clamp(1.25rem, 1rem + 1.25vw, 2.5rem);
  --grid-gap: clamp(1rem, 0.75rem + 1.25vw, 2rem);

  /* ─── Borders & Radius ─── */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* ─── Shadows ─── */
  --shadow-sm: 0 1px 2px rgba(11, 27, 51, 0.04);
  --shadow-md: 0 4px 12px rgba(11, 27, 51, 0.06);
  --shadow-lg: 0 8px 30px rgba(11, 27, 51, 0.08);
  --shadow-xl: 0 16px 48px rgba(11, 27, 51, 0.1);

  /* ─── Transitions ─── */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;

  /* ─── Z-index ─── */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}