/* ============================================================
   Field Notes — design tokens
   Nate Irwin · nate.irwin.xyz
   Cartographic topographic field-guide system.
   ============================================================ */

:root {
  /* --- Color: light (default) --- */
  --paper: #f4f0e6;
  --paper-raised: #fbf8f0;
  --paper-sunk: #ece6d6;
  --ink: #1a1a17;
  --forest: #1f3a2e;
  --forest-soft: #2c5343;
  --contour: #7a5c3e;
  --blaze: #e8662a;
  --blaze-ink: #c5491a; /* blaze tuned for AA text on paper */
  --muted: #6b6257;
  --rule: #d9d2c2;
  --rule-strong: #c4bca8;

  /* status accents */
  --status-done: var(--forest);
  --status-active: var(--blaze);
  --status-planned: var(--contour);

  color-scheme: light;

  /* --- Typography --- */
  --font-display: "Fraunces Variable", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-sans: "Inter Variable", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* optical / variation defaults for Fraunces */
  --display-vsettings: "opsz" 144, "SOFT" 0, "WONK" 0;

  /* fluid type scale (~1.25 modular) */
  --fs-hero: clamp(3rem, 8.5vw, 5.75rem);
  --fs-h1: clamp(2.4rem, 5.5vw, 3.4rem);
  --fs-h2: clamp(1.35rem, 2.6vw, 1.65rem);
  --fs-h3: 1.0625rem;
  --fs-lede: clamp(1.075rem, 1.6vw, 1.25rem);
  --fs-body: 1.0625rem;
  --fs-small: 0.875rem;
  --fs-label: 0.72rem;
  --fs-stat: clamp(1.9rem, 3.4vw, 2.5rem);

  --lh-tight: 1.04;
  --lh-snug: 1.25;
  --lh-body: 1.62;

  --tracking-label: 0.14em;
  --tracking-eyebrow: 0.22em;

  /* --- Space (8px base) --- */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4rem;
  --sp-9: 6rem;

  /* --- Structure --- */
  --measure: 68ch;       /* readable text width */
  --content-max: 56rem;  /* ~896px main column */
  --gutter: clamp(1.25rem, 5vw, 3rem);

  --radius-sm: 3px;
  --radius: 6px;
  --radius-lg: 10px;

  --border-hair: 1px solid var(--rule);
  --border-strong: 1px solid var(--rule-strong);

  --shadow-card: 0 1px 2px rgba(26, 26, 23, 0.04), 0 8px 24px -16px rgba(26, 26, 23, 0.18);

  --tap: 0.18s ease;
}

/* --- Color: dark --- */
[data-theme="dark"] {
  --paper: #14160f;
  --paper-raised: #1c1f18;
  --paper-sunk: #101209;
  --ink: #ece6d8;
  --forest: #8fb39b;
  --forest-soft: #a7c4b1;
  --contour: #b79b78;
  --blaze: #f0773b;
  --blaze-ink: #f7945f; /* lighter blaze reads as AA text on dark paper */
  --muted: #9b9384;
  --rule: #2c322b;
  --rule-strong: #3c443a;

  color-scheme: dark;
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px -18px rgba(0, 0, 0, 0.6);
}

/* Honor OS preference only when the user has not chosen explicitly. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --paper: #14160f;
    --paper-raised: #1c1f18;
    --paper-sunk: #101209;
    --ink: #ece6d8;
    --forest: #8fb39b;
    --forest-soft: #a7c4b1;
    --contour: #b79b78;
    --blaze: #f0773b;
    --blaze-ink: #f7945f;
    --muted: #9b9384;
    --rule: #2c322b;
    --rule-strong: #3c443a;

    color-scheme: dark;
    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px -18px rgba(0, 0, 0, 0.6);
  }
}