/* ============================================================
   tokens.css — CityForge SEO Design Tokens
   "The Observatory" — Bloomberg Terminal meets modern SaaS
   ============================================================ */

:root {
  /* ---- Backgrounds ---- */
  --bg-base: #0b0f1a;
  --bg-surface: #0f1424;
  --bg-card: rgba(15, 20, 40, 0.7);
  --bg-card-hover: rgba(20, 28, 55, 0.8);
  --bg-glass: rgba(15, 20, 40, 0.6);
  --bg-input: rgba(15, 20, 40, 0.5);
  --bg-overlay: rgba(11, 15, 26, 0.85);
  --bg-nav: rgba(11, 15, 26, 0.92);
  --bg-footer: #070a12;
  --bg-code: rgba(15, 20, 40, 0.9);

  /* ---- Accent Colors ---- */
  --accent-primary: #0ea5e9;
  --accent-primary-hover: #38bdf8;
  --accent-primary-muted: rgba(14, 165, 233, 0.15);
  --accent-secondary: #10b981;
  --accent-secondary-hover: #34d399;
  --accent-secondary-muted: rgba(16, 185, 129, 0.15);
  --accent-warning: #f59e0b;
  --accent-warning-hover: #fbbf24;
  --accent-warning-muted: rgba(245, 158, 11, 0.15);
  --accent-danger: #ef4444;
  --accent-danger-hover: #f87171;
  --accent-danger-muted: rgba(239, 68, 68, 0.15);

  /* ---- Text Colors ---- */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-heading: #f8fafc;
  --text-accent: #0ea5e9;
  --text-on-accent: #ffffff;
  --text-link: #38bdf8;
  --text-link-hover: #7dd3fc;

  /* ---- Borders ---- */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-default: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(14, 165, 233, 0.3);
  --border-success: rgba(16, 185, 129, 0.3);
  --border-warning: rgba(245, 158, 11, 0.3);

  /* ---- Shadows ---- */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.15);
  --shadow-glow-strong: 0 0 40px rgba(14, 165, 233, 0.25);
  --shadow-glow-green: 0 0 20px rgba(16, 185, 129, 0.15);
  --shadow-nav: 0 2px 20px rgba(0, 0, 0, 0.5);
  --shadow-tooltip: 0 8px 32px rgba(0, 0, 0, 0.6);

  /* ---- Border Radius ---- */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* ---- Spacing ---- */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* ---- Typography ---- */
  --font-heading: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia 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;

  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;

  /* ---- Font Weights ---- */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* ---- Z-Index Scale ---- */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-overlay: 50;
  --z-modal: 60;
  --z-nav: 100;
  --z-tooltip: 110;

  /* ---- Transitions ---- */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ---- Glass Morphism Preset ---- */
  --glass-blur: blur(12px);
  --glass-bg: rgba(15, 20, 40, 0.6);
  --glass-border: 1px solid rgba(255, 255, 255, 0.08);
  --glass-saturate: saturate(180%);

  /* ---- Gradients ---- */
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(14, 165, 233, 0.12) 0%, transparent 60%);
  --gradient-card-border: linear-gradient(135deg, rgba(14, 165, 233, 0.2), transparent 50%);
  --gradient-lock-overlay: linear-gradient(180deg, transparent 0%, rgba(11, 15, 26, 0.9) 100%);
  --gradient-nav: linear-gradient(180deg, rgba(11, 15, 26, 0.95), rgba(11, 15, 26, 0.85));
  --gradient-text-blue: linear-gradient(135deg, #0ea5e9, #38bdf8);
  --gradient-text-green: linear-gradient(135deg, #10b981, #34d399);
  --gradient-footer: linear-gradient(180deg, var(--bg-base), var(--bg-footer));
}

/* ============================================================
   Global Reset & Base Styles
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-base);
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-link-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

code, pre {
  font-family: var(--font-mono);
}

::selection {
  background-color: rgba(14, 165, 233, 0.3);
  color: var(--text-heading);
}

/* Scrollbar styling (webkit) */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.12) var(--bg-base);
}