/* ============================================
   DentAlign Design System - CSS Variables
   ============================================ */

:root {
  /* ========== COLORS - LIGHT THEME ========== */
  --color-primary: #00B3C6;
  --color-primary-hover: #00C9DE;
  --color-primary-dark: #009AAB;
  
  --color-secondary: #004F7C;
  --color-secondary-hover: #005E94;
  --color-secondary-dark: #003D5F;
  
  --color-accent: #ABEBFF;
  --color-accent-soft: rgba(171, 235, 255, 0.3);
  
  --color-success: #4ECDC4;
  --color-success-bg: rgba(78, 205, 196, 0.15);
  
  --color-error: #FF6B6B;
  --color-error-bg: rgba(255, 107, 107, 0.15);
  
  --color-warning: #FFE66D;
  
  /* Backgrounds */
  --bg-primary: #F4F7F8;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #E8EEF1;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  
  /* Text */
  --text-primary: #1A2B3C;
  --text-secondary: #4A5568;
  --text-tertiary: #718096;
  --text-inverse: #FFFFFF;
  
  /* Borders */
  --border-light: rgba(0, 79, 124, 0.1);
  --border-medium: rgba(0, 79, 124, 0.2);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 79, 124, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 79, 124, 0.12);
  --shadow-lg: 0 8px 40px rgba(0, 79, 124, 0.16);
  --shadow-xl: 0 16px 60px rgba(0, 79, 124, 0.2);
  --shadow-glow: 0 0 40px rgba(0, 179, 198, 0.4);
  --shadow-glow-strong: 0 0 60px rgba(0, 179, 198, 0.6);
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-blur: 20px;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #00B3C6 0%, #004F7C 100%);
  --gradient-accent: linear-gradient(135deg, #ABEBFF 0%, #00B3C6 100%);
  --gradient-hero: linear-gradient(180deg, rgba(244, 247, 248, 0) 0%, rgba(244, 247, 248, 0.8) 100%);
  --gradient-text: linear-gradient(135deg, #00B3C6 0%, #004F7C 50%, #00B3C6 100%);
  
  /* ========== TYPOGRAPHY ========== */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-primary);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes - Fluid */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.4rem + 2.4vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.5rem + 3.75vw, 3.5rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 4.5rem);
  --text-6xl: clamp(3.75rem, 2.5rem + 6.25vw, 6rem);
  
  /* Font Weights */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;
  
  /* Letter Spacing */
  --tracking-tighter: -0.03em;
  --tracking-tight: -0.015em;
  --tracking-normal: 0;
  --tracking-wide: 0.015em;
  --tracking-wider: 0.05em;
  
  /* ========== SPACING ========== */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */
  
  /* ========== LAYOUT ========== */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  
  --header-height: 80px;
  --section-padding: clamp(4rem, 8vw, 8rem);
  
  /* ========== BORDERS & RADIUS ========== */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* ========== TRANSITIONS ========== */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;
  
  /* ========== Z-INDEX ========== */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
}

/* ========== DARK THEME ========== */
[data-theme="dark"] {
  /* Colors */
  --color-secondary: #00AF1C;
  --color-secondary-hover: #00C820;
  --color-secondary-dark: #009618;
  
  /* Backgrounds */
  --bg-primary: #0D1B2A;
  --bg-secondary: #1B2838;
  --bg-tertiary: #243447;
  --bg-card: rgba(27, 40, 56, 0.8);
  --bg-card-hover: rgba(36, 52, 71, 0.95);
  
  /* Text */
  --text-primary: #F4F7F8;
  --text-secondary: #B8C5D3;
  --text-tertiary: #8899A8;
  
  /* Borders */
  --border-light: rgba(171, 235, 255, 0.1);
  --border-medium: rgba(171, 235, 255, 0.2);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px rgba(0, 179, 198, 0.3);
  --shadow-glow-strong: 0 0 60px rgba(0, 179, 198, 0.5);
  
  /* Glassmorphism */
  --glass-bg: rgba(27, 40, 56, 0.7);
  --glass-border: rgba(171, 235, 255, 0.15);
  
  /* Gradients */
  --gradient-hero: linear-gradient(180deg, rgba(13, 27, 42, 0) 0%, rgba(13, 27, 42, 0.9) 100%);
}

/* ========== MEDIA QUERIES HELPERS ========== */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
    --duration-slower: 0ms;
  }
}