/* ==========================================================================
   Agentic Technologies — Core Design Tokens
   Import this once in any HTML file:
     <link rel="stylesheet" href="/colors_and_type.css">
   Display face = Agentic Display (brand font, local). Body/mono still load
   from Google Fonts — see fonts/README.md.
   ========================================================================== */

@font-face {
  font-family: 'Agentic Display';
  src: url('fonts/AgenticDisplay-Regular.ttf') format('truetype');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

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

:root {
  /* ----- Brand primary (the logo blue) ----------------------------------- */
  --blue-50:  #EAF2FF;
  --blue-100: #D1E2FF;
  --blue-200: #A3C4FF;
  --blue-300: #6FA3FF;
  --blue-400: #3A82FF;
  --blue-500: #0A6EFF;   /* brand */
  --blue-600: #0057D6;
  --blue-700: #0044A8;
  --blue-800: #00327A;
  --blue-900: #001F4D;

  /* ----- Neutrals (warm-cool balanced, slight blue cast) ----------------- */
  --ink-0:   #FFFFFF;
  --ink-50:  #F7F8FA;
  --ink-100: #EEF0F4;
  --ink-200: #DDE1E8;
  --ink-300: #C2C8D2;
  --ink-400: #9AA1AE;
  --ink-500: #6B7280;
  --ink-600: #4B5260;
  --ink-700: #2F3542;
  --ink-800: #1A1E29;
  --ink-900: #0B0D13;    /* near-black, matches wordmark */

  /* ----- Semantic ------------------------------------------------------- */
  --success-50:  #E7F8EF;
  --success-500: #18A957;
  --success-700: #0F7A3E;

  --warn-50:  #FFF4E0;
  --warn-500: #F2A516;
  --warn-700: #B47608;

  --danger-50:  #FEECEC;
  --danger-500: #E5484D;
  --danger-700: #B0232A;

  --info-50:  var(--blue-50);
  --info-500: var(--blue-500);

  /* ----- Semantic surfaces (light theme default) ------------------------ */
  --bg:        var(--ink-0);
  --bg-muted:  var(--ink-50);
  --bg-sunken: var(--ink-100);

  --fg:       var(--ink-900);   /* primary text */
  --fg-1:     var(--ink-700);   /* secondary */
  --fg-2:     var(--ink-500);   /* tertiary / captions */
  --fg-3:     var(--ink-400);   /* quaternary / disabled */
  --fg-inv:   var(--ink-0);

  --accent:        var(--blue-500);
  --accent-hover:  var(--blue-600);
  --accent-press:  var(--blue-700);
  --accent-soft:   var(--blue-50);

  --border:      var(--ink-200);
  --border-soft: var(--ink-100);
  --border-hard: var(--ink-300);

  /* ----- Type ----------------------------------------------------------- */
  --font-display: 'Agentic Display', 'Space Grotesk', 'Archivo', ui-sans-serif, system-ui, sans-serif;
  --font-sans:    'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Type scale (rem-based; 1rem = 16px) */
  --fs-xs:   0.75rem;   /* 12 */
  --fs-sm:   0.875rem;  /* 14 */
  --fs-base: 1rem;      /* 16 */
  --fs-md:   1.125rem;  /* 18 */
  --fs-lg:   1.25rem;   /* 20 */
  --fs-xl:   1.5rem;    /* 24 */
  --fs-2xl:  2rem;      /* 32 */
  --fs-3xl:  2.5rem;    /* 40 */
  --fs-4xl:  3.25rem;   /* 52 */
  --fs-5xl:  4.5rem;    /* 72 */

  --lh-tight:  1.1;
  --lh-snug:   1.25;
  --lh-normal: 1.5;
  --lh-loose:  1.7;

  --tracking-tight:  -0.02em;
  --tracking-normal: 0em;
  --tracking-wide:   0.04em;
  --tracking-caps:   0.14em;

  /* ----- 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 --------------------------------------------------------- */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;   /* default */
  --r-lg: 14px;
  --r-xl: 20px;
  --r-2xl: 28px;
  --r-full: 9999px;

  /* ----- Shadows (soft-elevated system) -------------------------------- */
  --shadow-xs: 0 1px 2px rgba(11, 13, 19, 0.06);
  --shadow-sm: 0 2px 6px rgba(11, 13, 19, 0.06), 0 1px 2px rgba(11, 13, 19, 0.04);
  --shadow-md: 0 6px 16px rgba(11, 13, 19, 0.08), 0 2px 4px rgba(11, 13, 19, 0.04);
  --shadow-lg: 0 16px 32px rgba(11, 13, 19, 0.10), 0 4px 8px rgba(11, 13, 19, 0.05);
  --shadow-xl: 0 28px 56px rgba(11, 13, 19, 0.14);
  --shadow-focus: 0 0 0 4px rgba(10, 110, 255, 0.22);
  --shadow-inset: inset 0 1px 0 rgba(255,255,255,0.06), inset 0 -1px 0 rgba(11,13,19,0.04);

  /* ----- Motion -------------------------------------------------------- */
  --ease-standard: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:       cubic-bezier(0.7, 0, 0.84, 0);
  --dur-fast:   140ms;
  --dur-base:   220ms;
  --dur-slow:   380ms;

  /* ----- Layout -------------------------------------------------------- */
  --max-w-prose:   65ch;
  --max-w-content: 1200px;
  --max-w-wide:    1440px;
}

/* Dark theme override — apply via `data-theme="dark"` on <html> or any scope */
[data-theme="dark"] {
  --bg:        #0B0D13;
  --bg-muted:  #11141C;
  --bg-sunken: #070910;

  --fg:       #F7F8FA;
  --fg-1:     #C2C8D2;
  --fg-2:     #9AA1AE;
  --fg-3:     #6B7280;
  --fg-inv:   #0B0D13;

  --accent:        var(--blue-400);
  --accent-hover:  var(--blue-300);
  --accent-press:  var(--blue-500);
  --accent-soft:   rgba(58, 130, 255, 0.14);

  --border:      #262B38;
  --border-soft: #1A1E29;
  --border-hard: #343B4A;

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.5);
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.45), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.55);
}

/* ==========================================================================
   Base element styles
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--fg);
  background: var(--bg);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--fg);
  margin: 0;
  letter-spacing: var(--tracking-tight);
  line-height: var(--lh-tight);
  font-weight: 700;
  text-wrap: balance;
}
h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-md); letter-spacing: var(--tracking-caps); text-transform: uppercase; }

p { margin: 0; text-wrap: pretty; }

small, .caption {
  font-size: var(--fs-sm);
  color: var(--fg-2);
}

code, kbd, pre, samp {
  font-family: var(--font-mono);
  font-size: 0.92em;
}
code {
  background: var(--bg-sunken);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xs);
  padding: 0.08em 0.4em;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-standard);
}
a:hover { color: var(--accent-hover); text-decoration: underline; }

hr { border: 0; border-top: 1px solid var(--border); margin: var(--s-6) 0; }

::selection { background: var(--blue-200); color: var(--ink-900); }

/* Utility: tight eyebrow label */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--accent);
  font-weight: 500;
}