/* ── DoubleSlit Engine — Design Tokens ──────────────────────────────────────
   DM Sans · Black & White · Light / Dark modes
   iViRTH Pvt. Ltd.
   ─────────────────────────────────────────────────────────────────────────── */

/* Note: DM Sans font is loaded via <link> in head.php — no @import needed here */

/* ── Light Mode (default) ─────────────────────────────────────────────────── */
:root,
[data-theme="light"] {
  /* Surface */
  --bg-base:        #ffffff;
  --bg-subtle:      #f5f5f5;
  --bg-muted:       #ebebeb;
  --bg-overlay:     #e0e0e0;

  /* Text */
  --text-primary:   #0a0a0a;
  --text-secondary: #3a3a3a;
  --text-muted:     #6b6b6b;
  --text-faint:     #9e9e9e;
  --text-inverse:   #ffffff;

  /* Border */
  --border-strong:  #0a0a0a;
  --border-default: #c8c8c8;
  --border-subtle:  #e8e8e8;

  /* Accent — pure black as the sole accent */
  --accent:         #0a0a0a;
  --accent-hover:   #2a2a2a;
  --accent-subtle:  rgba(10,10,10,0.06);
  --accent-text:    #ffffff;

  /* Status */
  --success:        #1a7a3a;
  --error:          #c0392b;
  --warning:        #8a6a00;
  --info:           #1a4a8a;

  /* Glow / shadow */
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.10);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:      0 12px 40px rgba(0,0,0,0.12);
  --shadow-focus:   0 0 0 3px rgba(10,10,10,0.20);

  /* Theme toggle icon */
  --theme-icon: "☀";
}

/* ── Dark Mode ────────────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --bg-base:        #0a0a0a;
  --bg-subtle:      #141414;
  --bg-muted:       #1e1e1e;
  --bg-overlay:     #2a2a2a;

  --text-primary:   #f0f0f0;
  --text-secondary: #c0c0c0;
  --text-muted:     #888888;
  --text-faint:     #555555;
  --text-inverse:   #0a0a0a;

  --border-strong:  #f0f0f0;
  --border-default: #2e2e2e;
  --border-subtle:  #1a1a1a;

  --accent:         #f0f0f0;
  --accent-hover:   #d0d0d0;
  --accent-subtle:  rgba(240,240,240,0.06);
  --accent-text:    #0a0a0a;

  --success:        #4caf78;
  --error:          #e57373;
  --warning:        #ffd054;
  --info:           #64b5f6;

  --shadow-sm:      0 1px 3px rgba(0,0,0,0.40);
  --shadow-md:      0 4px 16px rgba(0,0,0,0.50);
  --shadow-lg:      0 12px 40px rgba(0,0,0,0.70);
  --shadow-focus:   0 0 0 3px rgba(240,240,240,0.20);

  --theme-icon: "☾";
}

/* ── Typography Scale ─────────────────────────────────────────────────────── */
:root {
  --font-sans:    'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono:    'DM Mono', 'Fira Code', monospace;

  --text-xs:    0.75rem;
  --text-sm:    0.875rem;
  --text-base:  1rem;
  --text-lg:    1.125rem;
  --text-xl:    1.25rem;
  --text-2xl:   1.5rem;
  --text-3xl:   1.875rem;
  --text-4xl:   2.25rem;
  --text-5xl:   3rem;
  --text-6xl:   3.75rem;

  --leading-tight:  1.25;
  --leading-snug:   1.375;
  --leading-normal: 1.5;
  --leading-relaxed:1.65;

  --tracking-tight: -0.025em;
  --tracking-snug:  -0.015em;
  --tracking-normal: 0em;
  --tracking-wide:  0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest:0.1em;

  /* Spacing */
  --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;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --container-sm:  640px;
  --container-md:  768px;
  --container-lg:  1024px;
  --container-xl:  1280px;
  --container-2xl: 1440px;
  --sidebar-width: 260px;
  --topbar-height: 60px;
}