/* ============================================
   NEUROLINK QUEST - BASE STYLES
   File: nlq-base-q19.css
   CUBE CSS Architecture - Composition Layer
   ============================================ */

@layer reset, base, composition, utilities;

/* ============================================
   RESET LAYER
   ============================================ */
@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
  }

  body {
    min-height: 100vh;
    line-height: 1.6;
  }

  img,
  picture,
  video,
  canvas,
  svg {
    display: block;
    max-width: 100%;
    height: auto;
  }

  input,
  button,
  textarea,
  select {
    font: inherit;
  }

  p,
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    overflow-wrap: break-word;
  }

  ul,
  ol {
    list-style: none;
  }

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

/* ============================================
   BASE LAYER - Design Tokens
   ============================================ */
@layer base {
  :root {
    /* Color Tokens */
    --color-primary: #00d4ff;
    --color-primary-dark: #0099cc;
    --color-secondary: #6366f1;
    --color-accent: #22d3ee;

    --color-bg-primary: #0a0e27;
    --color-bg-secondary: #141b3d;
    --color-bg-tertiary: #1e2749;
    --color-bg-card: #1a2142;

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0aec0;
    --color-text-muted: #718096;

    --color-border: #2d3748;
    --color-border-light: #4a5568;

    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;

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

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

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing Tokens */
    --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;

    /* Border Radius Tokens */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadow Tokens */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);

    /* Transition Tokens */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index Tokens */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
  }

  body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
  }

  h1 {
    font-size: var(--font-size-5xl);
  }

  h2 {
    font-size: var(--font-size-4xl);
  }

  h3 {
    font-size: var(--font-size-3xl);
  }

  h4 {
    font-size: var(--font-size-2xl);
  }

  h5 {
    font-size: var(--font-size-xl);
  }

  h6 {
    font-size: var(--font-size-lg);
  }

  p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
  }

  a {
    color: var(--color-primary);
    transition: color var(--transition-fast);
  }

  a:hover {
    color: var(--color-primary-dark);
  }

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

  input,
  textarea,
  select {
    width: 100%;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
  }

  input:focus,
  textarea:focus,
  select:focus {
    outline: none;
    border-color: var(--color-primary);
  }
}