/* =========================================================
   Belchak Solutions — Design Tokens (Light Precision)
   ========================================================= */

/* Google Fonts — Space Mono for monospace only.
   Primary font: Avenir Next (system font on macOS/iOS).
   NOTE: Avenir Next requires licensing for web embedding.
   For cross-platform production, host the .woff2 files in fonts/
   or substitute with a licensed alternative.                     */
@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap');

:root {
  /* ---------------------------------------------------
     COLOR SYSTEM — Light Precision
     --------------------------------------------------- */

  /* Backgrounds (white → cool grays) */
  --bg-primary:        #FFFFFF;
  --bg-surface:        #F7F8FA;
  --bg-elevated:       #EEF0F4;
  --bg-hover:          #E8EBF0;

  /* Borders (subtle → strong) */
  --border-subtle:     #E5E7EB;
  --border-default:    #D1D5DB;
  --border-strong:     #9CA3AF;

  /* Foregrounds (primary → quaternary) */
  --fg-primary:        #111827;
  --fg-secondary:      #4B5563;
  --fg-tertiary:       #9CA3AF;
  --fg-quaternary:     #D1D5DB;

  /* Accent — Refined Teal */
  --accent:            #0D9488;
  --accent-hover:      #0F766E;
  --accent-muted:      rgba(13, 148, 136, 0.06);
  --accent-subtle:     rgba(13, 148, 136, 0.12);
  --accent-fg:         #FFFFFF;
  --accent-gradient:   linear-gradient(135deg, #0D9488, #06B6D4);

  /* Semantic */
  --success:           #10B981;
  --success-muted:     rgba(16, 185, 129, 0.08);
  --warning:           #F59E0B;
  --warning-muted:     rgba(245, 158, 11, 0.08);
  --error:             #EF4444;
  --error-muted:       rgba(239, 68, 68, 0.08);
  --info:              #3B82F6;
  --info-muted:        rgba(59, 130, 246, 0.08);

  /* ---------------------------------------------------
     TYPOGRAPHY — Font Stacks
     --------------------------------------------------- */

  --font-display:      'Avenir Next', 'Avenir', system-ui, sans-serif;
  --font-body:         'Avenir Next', 'Avenir', system-ui, sans-serif;
  --font-mono:         'Space Mono', 'Courier New', monospace;

  /* ---------------------------------------------------
     TYPE SCALE
     --------------------------------------------------- */

  --text-display:      clamp(2.5rem, 4vw, 4rem);
  --leading-display:   1.05;
  --tracking-display:  -0.03em;
  --weight-display:    700;

  --text-h1:           clamp(2rem, 3vw, 3rem);
  --leading-h1:        1.1;
  --tracking-h1:       -0.025em;
  --weight-h1:         700;

  --text-h2:           clamp(1.5rem, 2.2vw, 2rem);
  --leading-h2:        1.2;
  --tracking-h2:       -0.02em;
  --weight-h2:         600;

  --text-h3:           clamp(1.125rem, 1.6vw, 1.5rem);
  --leading-h3:        1.3;
  --tracking-h3:       -0.01em;
  --weight-h3:         600;

  --text-body-lg:      1.125rem;
  --leading-body-lg:   1.6;

  --text-body:         1rem;
  --leading-body:      1.6;

  --text-body-sm:      0.875rem;
  --leading-body-sm:   1.5;

  --text-caption:      0.75rem;
  --leading-caption:   1.4;
  --tracking-caption:  0.02em;

  --text-mono:         0.875rem;
  --leading-mono:      1.5;

  /* ---------------------------------------------------
     SPACING — 8px base unit
     --------------------------------------------------- */

  --space-1:   4px;
  --space-2:   8px;
  --space-3:   12px;
  --space-4:   16px;
  --space-6:   24px;
  --space-8:   32px;
  --space-10:  40px;
  --space-12:  48px;
  --space-16:  64px;
  --space-20:  80px;
  --space-24:  96px;
  --space-32:  128px;

  /* ---------------------------------------------------
     RADII
     --------------------------------------------------- */

  --radius-sm:   4px;
  --radius-md:   6px;
  --radius-lg:   8px;

  /* ---------------------------------------------------
     MOTION
     --------------------------------------------------- */

  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast:   150ms;
  --duration-normal: 300ms;
  --duration-slow:   500ms;

  /* ---------------------------------------------------
     LAYOUT
     --------------------------------------------------- */

  --max-width:       1200px;
  --header-height:   64px;
}


/* =========================================================
   SEMANTIC ELEMENT STYLES
   ========================================================= */

body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--fg-primary);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--fg-primary);
  margin: 0;
}

h1 { font-size: var(--text-h1); line-height: var(--leading-h1); letter-spacing: var(--tracking-h1); font-weight: var(--weight-h1); }
h2 { font-size: var(--text-h2); line-height: var(--leading-h2); letter-spacing: var(--tracking-h2); font-weight: var(--weight-h2); }
h3 { font-size: var(--text-h3); line-height: var(--leading-h3); letter-spacing: var(--tracking-h3); font-weight: var(--weight-h3); }

p {
  margin: 0 0 var(--space-4) 0;
  color: var(--fg-secondary);
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
a:hover { color: var(--accent-hover); }

code, pre, .mono {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  line-height: var(--leading-mono);
}

code {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  color: var(--accent);
}

pre {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
}

::selection {
  background: var(--accent);
  color: var(--accent-fg);
}