/* Design System - CSS Custom Properties */

:root {
  /* ========================================
     COLOR PALETTE - White Primary, Beige Secondary
     ======================================== */

  /* Primary Colors - White (backgrounds) */
  --color-primary: #FFFFFF;
  --color-primary-dark: #F5F5F5;
  --color-primary-light: #FFFFFF;
  --color-primary-alpha-10: rgba(255, 255, 255, 0.1);
  --color-primary-alpha-20: rgba(255, 255, 255, 0.2);

  /* Secondary Colors - Warm Beige (cards, accents) */
  --color-secondary: #D2C9B7;
  --color-secondary-dark: #B8B299;
  --color-secondary-light: #E5DEC8;

  /* Neutral Base */
  --color-background: #FFFFFF;
  --color-surface: #D2C9B7;
  --color-surface-dark: #EAE6DD;
  --color-surface-elevated: #E5DEC8;

  /* Text Colors */
  --color-text-primary: #2C2C2C;
  --color-text-secondary: #5A5A5A;
  --color-text-tertiary: #8A8A8A;
  --color-text-inverse: #FFFFFF;

  /* Accent Colors - Sage Green for buttons/links */
  --color-accent: #5D7C6C;
  --color-accent-dark: #4A6355;
  --color-accent-light: #7A9B88;

  /* Feedback Colors */
  --color-success: #6B9D7B;
  --color-error: #C76B6B;
  --color-warning: #D4A860;
  --color-info: #6B8FAD;

  /* Gradients - Warm & Subtle */
  --gradient-hero: linear-gradient(135deg, #FFFFFF 0%, #F5F5F5 100%);
  --gradient-hero-alt: linear-gradient(135deg, #EAE6DD 0%, #D2C9B7 100%);
  --gradient-card: linear-gradient(180deg, #D2C9B7 0%, #E5DEC8 100%);
  --gradient-accent: linear-gradient(135deg, #5D7C6C 0%, #7A9B88 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(210, 201, 183, 0.3) 0%, transparent 70%);

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

  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

  /* Font Sizes - Fluid Typography */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);      /* 12px -> 14px */
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);         /* 14px -> 16px */
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);      /* 16px -> 18px */
  --font-size-lg: clamp(1.125rem, 1rem + 0.5vw, 1.5rem);          /* 18px -> 24px */
  --font-size-xl: clamp(1.5rem, 1.25rem + 1vw, 2.25rem);          /* 24px -> 36px */
  --font-size-2xl: clamp(2rem, 1.5rem + 2vw, 3.5rem);             /* 32px -> 56px */
  --font-size-3xl: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);           /* 40px -> 72px */

  /* Font Weights */
  --font-weight-normal: 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: 1.75;

  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;

  /* ========================================
     SPACING - 8px Base Grid
     ======================================== */

  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-2xl: 4rem;     /* 64px */
  --space-3xl: 6rem;     /* 96px */
  --space-4xl: 8rem;     /* 128px */
  --space-5xl: 12rem;    /* 192px */

  /* Container Spacing */
  --container-padding: clamp(1rem, 2vw, 1.5rem);
  --section-padding-y: clamp(1.5rem, 3vw, 2rem);

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

  /* Container */
  --container-max-width: 1280px;
  --container-narrow: 960px;
  --container-wide: 1440px;

  /* Breakpoints (for reference in JS) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

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

  /* Border Radius */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;

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

  /* ========================================
     SHADOWS - Layered Depth
     ======================================== */

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1),
               0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
               0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
               0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
               0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Colored Shadows - Glow Effects */
  --shadow-primary: 0 10px 40px -10px rgba(0, 102, 255, 0.4);
  --shadow-accent: 0 10px 40px -10px rgba(245, 158, 11, 0.4);

  /* ========================================
     ANIMATIONS
     ======================================== */

  /* Timing Functions */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-elastic: cubic-bezier(0.68, -0.6, 0.32, 1.6);

  /* Durations */
  --duration-fast: 200ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 700ms;

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

  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* ========================================
     COMPONENT-SPECIFIC
     ======================================== */

  /* Navigation */
  --nav-height: 80px;
  --nav-height-mobile: 64px;
  --nav-blur: blur(12px);
  --nav-bg-alpha: rgba(255, 255, 255, 0.8);

  /* Cards */
  --card-padding: var(--space-lg);
  --card-radius: var(--radius-xl);
  --card-shadow: var(--shadow-md);
  --card-hover-shadow: var(--shadow-xl);

  /* Buttons */
  --button-padding-x: var(--space-lg);
  --button-padding-y: var(--space-sm);
  --button-radius: var(--radius-lg);

  /* Inputs */
  --input-padding-x: var(--space-md);
  --input-padding-y: var(--space-sm);
  --input-radius: var(--radius-md);
  --input-border-color: #E7E5E4;
  --input-border-focus: var(--color-primary);
}