/* Antonio's SEO Tools - Design System Variables */
/* Inspired by seoworkflows.com - Clean, minimalist aesthetic */

:root {
  /* ============================================
     COLOR PALETTE
     ============================================ */

  /* Primary Colors */
  --primary-action: #2499EF;        /* Bright blue for CTAs */
  --primary-dark: #000639;          /* Dark navy for headers */
  --primary-light: #E3F2FD;         /* Light blue for hover states */

  /* Neutral Colors */
  --bg-primary: #ffffff;            /* Clean white backgrounds */
  --bg-secondary: #f3f4f9;          /* Light gray for sections */
  --bg-tertiary: #fafbfc;           /* Subtle gray for cards */

  /* Text Colors */
  --text-primary: #424242;          /* Primary body text */
  --text-secondary: #757575;        /* Supporting text */
  --text-tertiary: #9e9e9e;         /* Disabled/subtle text */

  /* Status Colors */
  --success: #10b981;               /* Success green */
  --warning: #f59e0b;               /* Warning amber */
  --error: #ef4444;                 /* Error red */
  --info: #3b82f6;                  /* Info blue */

  /* Accent Colors */
  --accent-purple: #8b5cf6;         /* Secondary accent for charts */
  --accent-cyan: #06b6d4;           /* Tertiary accent */

  /* ============================================
     TYPOGRAPHY
     ============================================ */

  /* Font Families */
  --font-primary: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Inter', sans-serif;
  --font-mono: 'Monaco', 'Menlo', 'Courier New', monospace;

  /* Font Sizes */
  --font-size-xs: 0.6875rem;        /* 11px - labels, tiny text */
  --font-size-sm: 0.875rem;         /* 14px - body small */
  --font-size-base: 1rem;           /* 16px - base body text */
  --font-size-lg: 1.125rem;         /* 18px - subheadings */
  --font-size-xl: 1.5rem;           /* 24px - section headings */
  --font-size-2xl: 2rem;            /* 32px - page headings */
  --font-size-3xl: 3rem;            /* 48px - large hero text */
  --font-size-4xl: 4rem;            /* 64px - homepage hero */

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

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  --line-height-loose: 1.8;

  /* ============================================
     SPACING SYSTEM (8px base unit)
     ============================================ */

  --space-0: 0;
  --space-1: 0.5rem;                /* 8px */
  --space-2: 1rem;                  /* 16px */
  --space-3: 1.5rem;                /* 24px */
  --space-4: 2rem;                  /* 32px */
  --space-5: 2.5rem;                /* 40px */
  --space-6: 3rem;                  /* 48px */
  --space-8: 4rem;                  /* 64px */
  --space-10: 5rem;                 /* 80px */
  --space-12: 6rem;                 /* 96px */

  /* ============================================
     LAYOUT
     ============================================ */

  /* Sidebar */
  --sidebar-width: 220px;
  --sidebar-bg: var(--bg-primary);
  --sidebar-border: rgba(158, 158, 158, 0.24);

  /* Container */
  --container-max-width: 1400px;
  --container-padding: var(--space-4);

  /* ============================================
     BORDERS & RADIUS
     ============================================ */

  /* Border Radius */
  --radius-sm: 0.375rem;            /* 6px - inputs, small elements */
  --radius-md: 0.5rem;              /* 8px - cards, buttons */
  --radius-lg: 1rem;                /* 16px - major sections */
  --radius-xl: 1.5rem;              /* 24px - hero sections */
  --radius-full: 625rem;            /* Pills, badges, circular */

  /* Border Widths */
  --border-thin: 1px;
  --border-medium: 2px;
  --border-thick: 4px;

  /* ============================================
     SHADOWS
     ============================================ */

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 3px 6px -2px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 16px -4px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 16px 32px -8px rgba(0, 0, 0, 0.18);

  /* ============================================
     GLASSMORPHISM EFFECTS
     ============================================ */

  --glass-bg: rgba(255, 255, 255, 0.9);
  --glass-border: rgba(158, 158, 158, 0.24);
  --glass-blur: blur(8px);

  /* ============================================
     TRANSITIONS & ANIMATIONS
     ============================================ */

  /* Transition Durations */
  --transition-fast: 150ms;
  --transition-base: 250ms;
  --transition-slow: 350ms;

  /* Easing Functions */
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);

  /* Combined Transitions */
  --transition-all-fast: all var(--transition-fast) var(--ease-in-out);
  --transition-all-base: all var(--transition-base) var(--ease-in-out);
  --transition-all-slow: all var(--transition-slow) var(--ease-in-out);

  /* ============================================
     Z-INDEX LAYERS
     ============================================ */

  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* ============================================
     BREAKPOINTS (for reference in JS)
     ============================================ */

  --breakpoint-sm: 480px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ============================================
   DARK MODE SUPPORT (Future Enhancement)
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    /* Optionally add dark mode variables here */
    /* Currently using light mode only per design spec */
  }
}