/*
 * tokens.css
 * All design tokens: type scale, spacing, color (light + dark), radius,
 * shadows, transitions, content widths, and font families.
 *
 * Art direction: developer portfolio → precise, minimal, confident
 * Palette: warm-neutral (Nexus) surfaces + teal primary accent
 * Typography: Cabinet Grotesk (display) + Satoshi (body)
 * Density: balanced — generous section breathing, compact UI chrome
 */

/* ─── Type scale (fluid, clamp-based) ───────────────────────── */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem   + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem   + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem  + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem     + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem   + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem   + 2.5vw,  3.5rem);
  --text-hero: clamp(2.75rem,  0.5rem   + 7vw,    6rem);
}

/* ─── 4px spacing scale ──────────────────────────────────────── */
:root {
  --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;
}

/* ─── Light mode (Nexus palette) ─────────────────────────────── */
:root,
[data-theme="light"] {
  /* Surfaces */
  --color-bg:               #f7f6f2;
  --color-surface:          #f9f8f5;
  --color-surface-2:        #fbfbf9;
  --color-surface-offset:   #f3f0ec;
  --color-surface-dynamic:  #e6e4df;
  --color-divider:          #dcd9d5;
  --color-border:           #d4d1ca;

  /* Text */
  --color-text:             #28251d;
  --color-text-muted:       #7a7974;
  --color-text-faint:       #bab9b4;
  --color-text-inverse:     #f9f8f4;

  /* Primary accent (teal) */
  --color-primary:          #01696f;
  --color-primary-hover:    #0c4e54;
  --color-primary-active:   #0f3638;
  --color-primary-highlight:#cedcd8;

  /* Radius */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);

  /* Transitions */
  --transition-fast:        120ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow:        320ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  /* Font families */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;

  /* Header height — used for scroll-padding and sticky offset */
  --header-height: 4rem;
}

/* ─── Dark mode ──────────────────────────────────────────────── */
[data-theme="dark"] {
  --color-bg:               #171614;
  --color-surface:          #1c1b19;
  --color-surface-2:        #201f1d;
  --color-surface-offset:   #1d1c1a;
  --color-surface-dynamic:  #2d2c2a;
  --color-divider:          #262523;
  --color-border:           #393836;
  --color-text:             #cdccca;
  --color-text-muted:       #797876;
  --color-text-faint:       #5a5957;
  --color-text-inverse:     #2b2a28;
  --color-primary:          #4f98a3;
  --color-primary-hover:    #227f8b;
  --color-primary-active:   #1a626b;
  --color-primary-highlight:#313b3b;
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.45);
}

/* System preference fallback (no manual toggle set yet) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:               #171614;
    --color-surface:          #1c1b19;
    --color-surface-2:        #201f1d;
    --color-surface-offset:   #1d1c1a;
    --color-surface-dynamic:  #2d2c2a;
    --color-divider:          #262523;
    --color-border:           #393836;
    --color-text:             #cdccca;
    --color-text-muted:       #797876;
    --color-text-faint:       #5a5957;
    --color-text-inverse:     #2b2a28;
    --color-primary:          #4f98a3;
    --color-primary-hover:    #227f8b;
    --color-primary-active:   #1a626b;
    --color-primary-highlight:#313b3b;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.35);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.45);
  }
}