/* ==========================================================================
   AIlyGence Master Design System - Dual Theme Tokens (Dark & Light)
   Visual Territory: Obsidian, Electric Violet, White, Clean Geometry
   Senior Product Engineering Architecture
   ========================================================================== */

:root {
  /* Default / Dark Mode Tokens (Obsidian Canvas) */
  --color-canvas: #08080C;
  --color-surface-base: #0E0E14;
  --color-surface-elevated: #14141E;
  --color-surface-highlight: #1B1B29;
  --color-surface-card: #0E0E14;
  --color-border-subtle: #232335;
  --color-border-active: #32324B;
  --color-border-glass: rgba(35, 35, 53, 0.7);

  /* Electric Violet Palette */
  --color-violet-primary: #7B2BF9;
  --color-violet-bright: #8F47FF;
  --color-violet-vivid: #9D5BFF;
  --color-violet-deep: #5816D6;
  --color-violet-glow: rgba(123, 43, 249, 0.28);
  --color-violet-soft: #A78BFA;
  --color-violet-tint: rgba(123, 43, 249, 0.12);
  --color-violet-tint-subtle: rgba(123, 43, 249, 0.05);
  --color-violet-border: rgba(143, 71, 255, 0.35);

  /* Text & Readability (WCAG 2.1 AA Compliant) */
  --color-text-pure: #FFFFFF;
  --color-text-primary: #F4F4F8;
  --color-text-secondary: #9E9EAF;
  --color-text-muted: #6C6C82;
  --color-text-dim: #4B4B60;

  /* Ambient Mesh Orbs */
  --color-ambient-orb-1: rgba(123, 43, 249, 0.15);
  --color-ambient-orb-2: rgba(143, 71, 255, 0.08);

  /* Semantic Feedback */
  --color-success: #10B981;
  --color-success-tint: rgba(16, 185, 129, 0.12);
  --color-warning: #F59E0B;
  --color-error: #EF4444;

  /* Navbar background */
  --color-nav-bg: rgba(8, 8, 12, 0.85);

  /* Typography Scales */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-family-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */

  /* 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;

  /* Container Max-Width */
  --container-max: 1240px;
  --container-narrow: 860px;

  /* Radii & Elevation */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 26px;
  --radius-pill: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.6);
  --shadow-violet-glow: 0 0 35px var(--color-violet-glow);
  --shadow-violet-glow-lg: 0 0 70px rgba(123, 43, 249, 0.35);

  /* Animation Easing Curves */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-out-expo);
  --transition-normal: 280ms var(--ease-out-expo);
  --transition-smooth: 450ms var(--ease-out-expo);
}

/* ==========================================================================
   Light Mode Theme Overrides
   ========================================================================== */
html[data-theme="light"] {
  --color-canvas: #F8F9FD;
  --color-surface-base: #FFFFFF;
  --color-surface-elevated: #F1F3FA;
  --color-surface-highlight: #E9EDF7;
  --color-surface-card: #FFFFFF;
  --color-border-subtle: #E2E6F2;
  --color-border-active: #CCD3E8;
  --color-border-glass: rgba(226, 230, 242, 0.8);

  --color-violet-primary: #6C22F2;
  --color-violet-bright: #7B2BF9;
  --color-violet-vivid: #8B3DFF;
  --color-violet-deep: #5013BD;
  --color-violet-glow: rgba(108, 34, 242, 0.18);
  --color-violet-soft: #6C22F2;
  --color-violet-tint: rgba(108, 34, 242, 0.08);
  --color-violet-tint-subtle: rgba(108, 34, 242, 0.04);
  --color-violet-border: rgba(108, 34, 242, 0.25);

  --color-text-pure: #08080C;
  --color-text-primary: #151520;
  --color-text-secondary: #4E4E65;
  --color-text-muted: #6E6E88;
  --color-text-dim: #8E8EA8;

  --color-ambient-orb-1: rgba(108, 34, 242, 0.08);
  --color-ambient-orb-2: rgba(123, 43, 249, 0.05);

  --color-nav-bg: rgba(248, 249, 253, 0.88);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 48px rgba(108, 34, 242, 0.1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

body {
  background-color: var(--color-canvas);
  color: var(--color-text-primary);
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  letter-spacing: -0.012em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Background Ambient Glow Orbs */
.bg-ambient-orb-1 {
  position: fixed;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, var(--color-ambient-orb-1), transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
  animation: orbBreathe 10s infinite ease-in-out alternate;
}

.bg-ambient-orb-2 {
  position: fixed;
  bottom: 20%;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--color-ambient-orb-2), transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: -1;
}

/* Skip to Content for Accessibility */
.skip-to-content {
  position: absolute;
  top: -120px;
  left: var(--space-4);
  background: var(--color-violet-primary);
  color: #FFFFFF;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: 9999;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: var(--space-4);
  outline: 2px solid #FFFFFF;
}

/* Focus States */
:focus-visible {
  outline: 2px solid var(--color-violet-bright);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-pure);
  font-family: var(--font-family-display);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-text-pure) 20%, var(--color-violet-bright) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

html[data-theme="light"] .text-gradient {
  background: linear-gradient(135deg, #08080C 20%, var(--color-violet-primary) 85%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-violet {
  color: var(--color-violet-bright);
}

.text-muted {
  color: var(--color-text-secondary);
}

.text-subtle {
  color: var(--color-text-muted);
}

/* Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* Sections */
.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
  position: relative;
}

.section-divider {
  border-top: 1px solid var(--color-border-subtle);
}