/* =========================================================================
   ELI — Colors & Type
   Graph-native, mono-forward, light/dark, minimal palette + orange accent.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* ---------- Core palette ----------
     ELI leans almost entirely on a neutral scale + a single accent.
     Neutrals are slightly cool-warm mixed (NOT pure gray) to read like paper
     rather than chrome. */

  /* Neutrals — light side */
  --paper:        #FAFAF7;   /* page background, lightly warm */
  --paper-2:      #F2F2EC;   /* subtle surfaces, striped rows */
  --ink:          #0E0E0C;   /* near-black, body on light */
  --ink-2:        #1C1C19;
  --ink-3:        #3A3A35;
  --ink-4:        #6B6B63;
  --ink-5:        #9A9A92;
  --ink-6:        #C9C9C0;
  --ink-7:        #E4E4DA;

  /* Neutrals — dark side */
  --vellum:       #0B0B0A;   /* page bg, near-black w/ warm tint */
  --vellum-2:     #141412;
  --vellum-3:     #1C1C19;
  --vellum-4:     #2A2A26;
  --vellum-5:     #3A3A34;

  /* Accent — orange from Techbible logo dot */
  --ember:        #FF5A1F;   /* primary accent */
  --ember-soft:   #FFE4D6;   /* tinted background */
  --ember-ink:    #B23A0E;   /* accent on light bg (text) */
  --ember-glow:   #FF7A44;   /* hover lift */

  /* Semantic — used sparingly */
  --ok:           #1F7A4D;
  --warn:         #B88500;
  --crit:         #C23D1F;   /* picks up ember to stay family */
  --info:         #2A5BA3;

  /* Graph palette — used for node/edge coloring ONLY */
  --graph-1:      #FF5A1F;   /* ember, "AI / active" */
  --graph-2:      #0E0E0C;   /* ink, "owned / canonical" */
  --graph-3:      #6B6B63;   /* ink-4, "human / default" */
  --graph-4:      #B88500;   /* amber, "at-risk / watch" */
  --graph-5:      #1F7A4D;   /* "healthy / approved" */
  --graph-6:      #2A5BA3;   /* "external / integration" */

  /* ---------- Semantic tokens (light mode default) ---------- */
  --bg:           var(--paper);
  --bg-raised:    #FFFFFF;
  --bg-sunken:    var(--paper-2);
  --surface:      #FFFFFF;
  --surface-2:    var(--paper-2);

  --fg:           var(--ink);
  --fg-1:         var(--ink);
  --fg-2:         var(--ink-3);
  --fg-3:         var(--ink-4);
  --fg-muted:     var(--ink-5);
  --fg-faint:     var(--ink-6);
  --fg-on-accent: #FFFFFF;

  --border:       var(--ink-7);
  --border-strong:var(--ink-6);
  --border-hair:  color-mix(in oklab, var(--ink) 8%, transparent);

  --accent:       var(--ember);
  --accent-ink:   var(--ember-ink);
  --accent-soft:  var(--ember-soft);
  --accent-glow:  var(--ember-glow);

  /* ---------- Type families ---------- */
  --font-mono:    'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-display: 'JetBrains Mono', ui-monospace, monospace;

  /* ---------- Type scale ---------- */
  --fs-xs:   11px;
  --fs-sm:   12px;
  --fs-base: 14px;   /* dense enterprise UI baseline */
  --fs-md:   16px;
  --fs-lg:   18px;
  --fs-xl:   22px;
  --fs-2xl:  28px;
  --fs-3xl:  36px;
  --fs-4xl:  48px;
  --fs-5xl:  64px;
  --fs-6xl:  88px;

  --lh-tight:  1.05;
  --lh-snug:   1.25;
  --lh-normal: 1.45;
  --lh-loose:  1.65;

  --tracking-tight:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:   0.02em;
  --tracking-mono:   -0.01em;   /* mono looks sharper slightly tight */
  --tracking-caps:   0.08em;

  /* ---------- Spacing (4px base) ---------- */
  --s-0: 0;
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 20px;
  --s-6: 24px;
  --s-8: 32px;
  --s-10: 40px;
  --s-12: 48px;
  --s-16: 64px;
  --s-20: 80px;
  --s-24: 96px;

  /* ---------- Radii ----------
     Radii are small. ELI reads as technical/precise; chunky rounding
     undermines that. Buttons, cards, inputs: 4-8px. */
  --r-0: 0;
  --r-1: 2px;
  --r-2: 4px;
  --r-3: 6px;
  --r-4: 8px;
  --r-5: 12px;
  --r-full: 999px;

  /* ---------- Elevation / shadows ----------
     Shadows are tight + layered — "paper on paper" not "glass float". */
  --shadow-hair:   0 0 0 1px var(--border-hair);
  --shadow-1:      0 1px 0 rgba(14,14,12,0.04), 0 1px 2px rgba(14,14,12,0.06);
  --shadow-2:      0 1px 0 rgba(14,14,12,0.04), 0 4px 12px -2px rgba(14,14,12,0.08);
  --shadow-3:      0 2px 0 rgba(14,14,12,0.04), 0 12px 28px -6px rgba(14,14,12,0.14);
  --shadow-inset:  inset 0 0 0 1px var(--border);
  --shadow-focus:  0 0 0 3px color-mix(in oklab, var(--ember) 30%, transparent);

  /* ---------- Motion ---------- */
  --ease-out:   cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-in:    cubic-bezier(0.55, 0, 0.68, 0.2);
  --ease-std:   cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast:   120ms;
  --dur-base:   180ms;
  --dur-slow:   320ms;

  /* ---------- Grid/blueprint pattern ---------- */
  --grid-line:  color-mix(in oklab, var(--ink) 6%, transparent);
  --grid-major: color-mix(in oklab, var(--ink) 10%, transparent);
}

/* =========================================================================
   Dark mode tokens — applied via [data-theme="dark"] or .dark on an ancestor.
   ========================================================================= */
[data-theme="dark"], .dark {
  --bg:           var(--vellum);
  --bg-raised:    var(--vellum-2);
  --bg-sunken:    #050504;
  --surface:      var(--vellum-2);
  --surface-2:    var(--vellum-3);

  --fg:           #F2F2EC;
  --fg-1:         #F2F2EC;
  --fg-2:         #C9C9C0;
  --fg-3:         #9A9A92;
  --fg-muted:     #6B6B63;
  --fg-faint:     #3A3A34;

  --border:       var(--vellum-4);
  --border-strong:var(--vellum-5);
  --border-hair:  color-mix(in oklab, #fff 8%, transparent);

  --accent-ink:   var(--ember);   /* on dark, accent == ember */
  --accent-soft:  color-mix(in oklab, var(--ember) 20%, var(--vellum));

  --shadow-1:     0 1px 0 rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.4);
  --shadow-2:     0 1px 0 rgba(0,0,0,0.3), 0 6px 16px rgba(0,0,0,0.5);
  --shadow-3:     0 2px 0 rgba(0,0,0,0.3), 0 16px 32px rgba(0,0,0,0.6);

  --grid-line:    color-mix(in oklab, #fff 6%, transparent);
  --grid-major:   color-mix(in oklab, #fff 10%, transparent);
}

/* =========================================================================
   Base — applied globally. `.eli` class scopes if you don't want globals.
   ========================================================================= */

html, body, .eli {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
}

/* ---------- Semantic type roles ---------- */

.eli-display,
.eli h1.display {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-5xl);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-mono);
  color: var(--fg-1);
}

.eli h1, h1.eli {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-4xl);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-mono);
}
.eli h2, h2.eli {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-2xl);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-mono);
}
.eli h3, h3.eli {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-lg);
  line-height: var(--lh-snug);
}
.eli h4, h4.eli {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-md);
  line-height: var(--lh-snug);
}
.eli p, p.eli {
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--fg-2);
  max-width: 66ch;
}

.eli-lead {
  font-size: var(--fs-lg);
  line-height: var(--lh-normal);
  color: var(--fg-2);
  max-width: 62ch;
}

.eli-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--fg-3);
}

.eli-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--fg-3);
  letter-spacing: var(--tracking-wide);
}

.eli code, code.eli, .eli-mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: var(--tracking-mono);
}

.eli-kbd {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: var(--r-2);
  background: var(--surface);
  color: var(--fg-2);
}

/* ---------- Utilities ---------- */
.eli-hairline { border: 0; border-top: 1px solid var(--border); }
.eli-dot-ember::after {
  content: "";
  display: inline-block;
  width: 0.35em; height: 0.35em;
  border-radius: 999px;
  background: var(--ember);
  margin-left: 0.12em;
  vertical-align: baseline;
  transform: translateY(-0.05em);
}

/* Grid/blueprint background — core brand texture */
.eli-grid-bg {
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -1px -1px;
}
.eli-grid-bg-dense {
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 12px 12px;
}

/* Focus ring */
.eli *:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--r-2);
}