/* ═══════════════════════════════════════════════════════════════════════
   GOCOSYS Design System — Design Tokens
   The single source of truth for color, type, space, elevation & motion.
   Two themes (dark = brand-native default, light = enterprise bright) are
   expressed as semantic tokens so every component is theme-agnostic.
   ─ Primitive palette  →  Semantic roles  →  Scales (space/type/radius/…)
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  /* ── Primitive palette — raw brand colors (theme-independent) ────────── */
  --c-navy-950: #010818;
  --c-navy-900: #030d22;
  --c-navy-850: #061328;
  --c-navy-800: #081a3a;
  --c-navy-700: #0d2350;
  --c-navy-600: #123066;

  --c-blue-400: #60a5fa;
  --c-blue-500: #3b82f6;
  --c-blue-600: #2563eb;
  --c-indigo-500: #6366f1;
  --c-violet-500: #8b5cf6;
  --c-purple-500: #7c3aed;
  --c-purple-400: #a855f7;
  --c-cyan-400: #38bdf8;
  --c-cyan-500: #06b6d4;
  --c-teal-400: #2dd4bf;
  --c-green-500: #22c55e;
  --c-green-400: #4ade80;
  --c-amber-500: #f59e0b;
  --c-orange-500: #ff9f43;
  --c-red-500: #ef4444;
  --c-pink-500: #ec4899;

  /* Signature GOCOSYS yellow — the one constant across both themes */
  --c-yellow:      #f8ed08;
  --c-yellow-soft: #fffb6e;
  --c-yellow-deep: #d9cf00;
  --c-yellow-ink:  #0a1020;   /* readable dark ink for text on yellow */

  /* Neutral scale (used to compose light-theme surfaces) */
  --c-white: #ffffff;
  --c-slate-50:  #f6f8fc;
  --c-slate-100: #eef2f9;
  --c-slate-200: #e2e8f2;
  --c-slate-300: #cbd5e6;
  --c-slate-400: #94a3b8;
  --c-slate-500: #64748b;
  --c-slate-600: #475569;
  --c-slate-700: #334155;
  --c-slate-800: #1e293b;
  --c-slate-900: #0f172a;

  /* ── Type families ──────────────────────────────────────────────────── */
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Space Grotesk', var(--font-body);
  --font-mono:    'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* ── Type scale (fluid, clamp-based) ────────────────────────────────── */
  --fs-display:  clamp(2.5rem, 1.6rem + 4.4vw, 4.75rem);  /* 40 → 76 */
  --fs-h1:       clamp(2rem,   1.35rem + 3.1vw, 3.5rem);  /* 32 → 56 */
  --fs-h2:       clamp(1.6rem, 1.2rem + 2.0vw, 2.5rem);   /* 26 → 40 */
  --fs-h3:       clamp(1.25rem, 1.05rem + 1.0vw, 1.625rem);/* 20 → 26 */
  --fs-title:    1.125rem;   /* 18 */
  --fs-body-lg:  1.0625rem;  /* 17 */
  --fs-body:     1rem;       /* 16 */
  --fs-body-sm:  0.9375rem;  /* 15 */
  --fs-caption:  0.8125rem;  /* 13 */
  --fs-label:    0.75rem;    /* 12 */

  --lh-tight:   1.1;
  --lh-snug:    1.28;
  --lh-normal:  1.6;
  --lh-relaxed: 1.75;

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold: 600;
  --fw-bold:    700;
  --fw-extra:   800;
  --fw-black:   900;

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

  /* ── Spacing — strict 8px grid (4px half-steps) ─────────────────────── */
  --space-0:  0;
  --space-1:  0.25rem;  /* 4  */
  --space-2:  0.5rem;   /* 8  */
  --space-3:  0.75rem;  /* 12 */
  --space-4:  1rem;     /* 16 */
  --space-5:  1.5rem;   /* 24 */
  --space-6:  2rem;     /* 32 */
  --space-7:  2.5rem;   /* 40 */
  --space-8:  3rem;     /* 48 */
  --space-9:  4rem;     /* 64 */
  --space-10: 5rem;     /* 80 */
  --space-11: 6rem;     /* 96 */
  --space-12: 8rem;     /* 128 */

  /* ── Radius scale ───────────────────────────────────────────────────── */
  --radius-xs:  6px;
  --radius-sm:  10px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-2xl: 36px;
  --radius-full: 9999px;

  /* ── Motion ─────────────────────────────────────────────────────────── */
  --ease-out:      cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out:   cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-1: 0.15s;
  --dur-2: 0.25s;
  --dur-3: 0.4s;
  --dur-4: 0.6s;
  --transition-fast:   var(--dur-1) var(--ease-out);
  --transition-normal: var(--dur-2) var(--ease-out);
  --transition-slow:   var(--dur-3) var(--ease-out);

  /* ── Layout ─────────────────────────────────────────────────────────── */
  --container-max: 1200px;
  --container-wide: 1320px;
  --container-pad: var(--space-5);
  --navbar-height: 72px;

  /* ── Z-index scale ──────────────────────────────────────────────────── */
  --z-base: 1;
  --z-sticky: 100;
  --z-dropdown: 500;
  --z-navbar: 1000;
  --z-overlay: 1500;
  --z-modal: 2000;
  --z-toast: 3000;
  --z-progress: 9999;

  /* ── Brand accent tokens (shared by both themes) ────────────────────── */
  --brand:    var(--c-blue-500);
  --brand-2:  var(--c-indigo-500);
  --brand-3:  var(--c-purple-500);
  --accent:   var(--c-yellow);
  --accent-ink: var(--c-yellow-ink);

  /* Product-family accent hues (used by product cards) */
  --hue-crm:      var(--c-blue-500);
  --hue-erp:      var(--c-indigo-500);
  --hue-finance:  var(--c-green-500);
  --hue-hr:       var(--c-pink-500);
  --hue-lms:      var(--c-cyan-400);
  --hue-seo:      var(--c-amber-500);
  --hue-desk:     var(--c-violet-500);
  --hue-devtools: var(--c-teal-400);
  --hue-ai:       var(--c-purple-400);
  --hue-content:  var(--c-orange-500);
}

/* ═══════════════════════════════════════════════════════════════════════
   THEME: DARK (brand-native default — deep navy glass)
   ═══════════════════════════════════════════════════════════════════════ */
:root,
:root[data-theme="dark"] {
  color-scheme: dark;

  --bg:          var(--c-navy-950);
  --bg-2:        var(--c-navy-900);
  --bg-grad-a:   rgba(0, 70, 200, 0.34);
  --bg-grad-b:   rgba(10, 30, 120, 0.32);
  --bg-grad-c:   rgba(20, 60, 160, 0.14);

  --surface:      rgba(8, 22, 52, 0.55);
  --surface-2:    rgba(14, 34, 78, 0.60);
  --surface-solid: #081a3a;
  --surface-inset: rgba(255, 255, 255, 0.03);

  --text:        #eaf2ff;
  --text-muted:  rgba(200, 220, 255, 0.66);
  --text-dim:    rgba(160, 190, 230, 0.44);
  --text-inverse: var(--c-navy-950);

  --border:        rgba(70, 120, 220, 0.20);
  --border-strong: rgba(120, 170, 255, 0.40);
  --border-soft:   rgba(120, 170, 255, 0.10);

  --glass-bg:       rgba(8, 22, 52, 0.55);
  --glass-bg-hover: rgba(14, 34, 78, 0.66);
  --glass-blur:     blur(22px) saturate(180%);

  --ring: rgba(59, 130, 246, 0.55);

  --shadow-xs: 0 1px 2px rgba(0, 6, 24, 0.5);
  --shadow-sm: 0 2px 10px rgba(0, 6, 24, 0.4);
  --shadow-md: 0 10px 34px rgba(0, 8, 30, 0.5);
  --shadow-lg: 0 24px 70px rgba(0, 6, 24, 0.6);
  --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.22);
  --shadow-glow-accent: 0 0 50px rgba(248, 237, 8, 0.20);

  --brand-text: var(--c-blue-400);   /* brand color legible on dark */
  --nav-bg: rgba(2, 10, 26, 0.72);
  --nav-bg-scrolled: rgba(2, 10, 26, 0.88);
  --code-bg: rgba(2, 10, 26, 0.7);

  --grad-brand: linear-gradient(135deg, var(--c-blue-500), var(--c-indigo-500) 55%, var(--c-purple-500));
  --grad-accent-text: linear-gradient(100deg, #fff7b0 0%, #f8ed08 42%, #ffd83d 82%);
  --grad-hero-text: linear-gradient(120deg, #ffffff 0%, #cfe0ff 60%, #8fb4ff 100%);
}

/* ═══════════════════════════════════════════════════════════════════════
   THEME: LIGHT (enterprise bright — clean, high-contrast, airy)
   ═══════════════════════════════════════════════════════════════════════ */
:root[data-theme="light"] {
  color-scheme: light;

  --bg:          #ffffff;
  --bg-2:        var(--c-slate-50);
  --bg-grad-a:   rgba(59, 130, 246, 0.10);
  --bg-grad-b:   rgba(124, 58, 237, 0.07);
  --bg-grad-c:   rgba(6, 182, 212, 0.06);

  --surface:      #ffffff;
  --surface-2:    var(--c-slate-50);
  --surface-solid: #ffffff;
  --surface-inset: var(--c-slate-100);

  --text:        var(--c-slate-900);
  --text-muted:  var(--c-slate-600);
  --text-dim:    var(--c-slate-400);
  --text-inverse: #ffffff;

  --border:        var(--c-slate-200);
  --border-strong: var(--c-slate-300);
  --border-soft:   var(--c-slate-100);

  --glass-bg:       rgba(255, 255, 255, 0.72);
  --glass-bg-hover: rgba(255, 255, 255, 0.92);
  --glass-blur:     blur(20px) saturate(150%);

  --ring: rgba(37, 99, 235, 0.45);

  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.09);
  --shadow-lg: 0 28px 64px rgba(15, 23, 42, 0.14);
  --shadow-glow: 0 12px 40px rgba(59, 130, 246, 0.16);
  --shadow-glow-accent: 0 10px 34px rgba(217, 207, 0, 0.22);

  --brand-text: var(--c-blue-600);
  --nav-bg: rgba(255, 255, 255, 0.78);
  --nav-bg-scrolled: rgba(255, 255, 255, 0.9);
  --code-bg: var(--c-slate-900);

  --grad-brand: linear-gradient(135deg, var(--c-blue-600), var(--c-indigo-500) 55%, var(--c-purple-500));
  --grad-accent-text: linear-gradient(100deg, #b8a900 0%, #8a8000 55%, #a89600 100%);
  --grad-hero-text: linear-gradient(120deg, #0f172a 0%, #1e40af 60%, #6d28d9 100%);
}

/* No-JS fallback: honor the OS preference before the theme script runs */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) { color-scheme: light; }
}