/* ==========================================================================
   #GLOBAL STYLES
   ========================================================================== */

:root {
  /* Color System */
  --color-primary: #4F46E5;
  --color-primary-light: #818CF8;
  --color-primary-dark: #4338CA;
  --color-secondary: #EC4899;
  --color-accent: #F59E0B;
  --color-success: #10B981;
  --color-danger: #EF4444;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;
  
  /* Neutral Colors - Light Theme */
  --color-white: #FFFFFF;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  --color-black: #000000;
  
  /* Theme Specific Variables */
  --color-bg: var(--color-white);
  --color-bg-secondary: var(--color-gray-50);
  --color-text: var(--color-gray-800);
  --color-text-secondary: var(--color-gray-600);
  --color-border: var(--color-gray-200);
  --color-card: var(--color-white);
  --color-card-hover: var(--color-gray-50);
  --color-overlay: rgba(0, 0, 0, 0.5);
  
  /* Dark Theme Overrides */
  --color-bg-dark: #0F172A;
  --color-bg-secondary-dark: #1E293B;
  --color-text-dark: #F1F5F9;
  --color-text-secondary-dark: #94A3B8;
  --color-border-dark: #334155;
  --color-card-dark: #1E293B;
  --color-card-hover-dark: #334155;
  --color-overlay-dark: rgba(15, 23, 42, 0.8);
  
  /* Typography */
  --font-family-sans: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-family-mono: 'SF Mono', 'Roboto Mono', monospace;
  
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */
  --font-size-6xl: 3.75rem;  /* 60px */
  
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-none: 1;
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* Spacing */
  --spacing-px: 1px;
  --spacing-0: 0;
  --spacing-0-5: 0.125rem;  /* 2px */
  --spacing-1: 0.25rem;     /* 4px */
  --spacing-1-5: 0.375rem;  /* 6px */
  --spacing-2: 0.5rem;      /* 8px */
  --spacing-2-5: 0.625rem;  /* 10px */
  --spacing-3: 0.75rem;     /* 12px */
  --spacing-3-5: 0.875rem;  /* 14px */
  --spacing-4: 1rem;        /* 16px */
  --spacing-5: 1.25rem;     /* 20px */
  --spacing-6: 1.5rem;      /* 24px */
  --spacing-7: 1.75rem;     /* 28px */
  --spacing-8: 2rem;        /* 32px */
  --spacing-9: 2.25rem;     /* 36px */
  --spacing-10: 2.5rem;     /* 40px */
  --spacing-11: 2.75rem;    /* 44px */
  --spacing-12: 3rem;       /* 48px */
  --spacing-14: 3.5rem;     /* 56px */
  --spacing-16: 4rem;       /* 64px */
  --spacing-20: 5rem;       /* 80px */
  --spacing-24: 6rem;       /* 96px */
  --spacing-28: 7rem;       /* 112px */
  --spacing-32: 8rem;       /* 128px */
  --spacing-36: 9rem;       /* 144px */
  --spacing-40: 10rem;      /* 160px */
  --spacing-44: 11rem;      /* 176px */
  --spacing-48: 12rem;      /* 192px */
  --spacing-52: 13rem;      /* 208px */
  --spacing-56: 14rem;      /* 224px */
  --spacing-60: 15rem;      /* 240px */
  --spacing-64: 16rem;      /* 256px */
  --spacing-72: 18rem;      /* 288px */
  --spacing-80: 20rem;      /* 320px */
  --spacing-96: 24rem;      /* 384px */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;    /* 2px */
  --radius: 0.25rem;        /* 4px */
  --radius-md: 0.375rem;    /* 6px */
  --radius-lg: 0.5rem;      /* 8px */
  --radius-xl: 0.75rem;     /* 12px */
  --radius-2xl: 1rem;       /* 16px */
  --radius-3xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;
  
  /* Box Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  --shadow-outline: 0 0 0 3px rgba(79, 70, 229, 0.5);
  
  /* Z-Index */
  --z-0: 0;
  --z-10: 10;
  --z-20: 20;
  --z-30: 30;
  --z-40: 40;
  --z-50: 50;
  --z-auto: auto;
  
  /* Transitions */
  --transition: all 0.2s ease-in-out;
  --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-transform: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Container */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1400px;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: var(--color-bg-dark);
  --color-bg-secondary: var(--color-bg-secondary-dark);
  --color-text: var(--color-text-dark);
  --color-text-secondary: var(--color-text-secondary-dark);
  --color-border: var(--color-border-dark);
  --color-card: var(--color-card-dark);
  --color-card-hover: var(--color-card-hover-dark);
  --color-overlay: var(--color-overlay-dark);
}

/* ==========================================================================
   #BASE STYLES
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-4);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
}

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(--spacing-4);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition);
}

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

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

/* Layout */
.container {
  width: 100%;
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.section {
  padding: var(--spacing-20) 0;
  position: relative;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-medium);
  padding: clamp(0.75rem, 1.5vw, 1rem) clamp(1rem, 2.5vw, 1.5rem);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  font-size: clamp(0.9rem, 1.2vw, 1rem);
  line-height: var(--line-height-none);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  min-height: 44px;
  min-width: fit-content;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn i {
  margin-right: var(--spacing-2);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: rgba(79, 70, 229, 0.1);
  transform: translateY(-2px);
}

.btn-lg {
  padding: var(--spacing-3) var(--spacing-8);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: var(--spacing-1-5) var(--spacing-3);
  font-size: var(--font-size-sm);
  border-radius: var(--radius);
}

/* Form Elements */
input,
textarea,
select {
  width: 100%;
  padding: clamp(0.75rem, 1.5vw, 1rem) clamp(0.875rem, 1.5vw, 1rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: clamp(0.9rem, 1.2vw, 1rem);
  transition: var(--transition);
  min-height: 44px;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  touch-action: manipulation;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-gray-400);
}

/* Cards */
.card {
  background-color: var(--color-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-6);
  transition: var(--transition);
  border: 1px solid var(--color-border);
  height: 100%;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  margin-bottom: var(--spacing-4);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2);
  color: var(--color-text);
}

.card-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-10 { margin-top: var(--spacing-10); }
.mt-12 { margin-top: var(--spacing-12); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-10 { margin-bottom: var(--spacing-10); }
.mb-12 { margin-bottom: var(--spacing-12); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-none { box-shadow: none; }

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-initial { flex: 0 1 auto; }
.flex-none { flex: none; }

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-baseline { align-items: baseline; }
.items-stretch { align-items: stretch; }

.self-auto { align-self: auto; }
.self-start { align-self: flex-start; }
.self-end { align-self: flex-end; }
.self-center { align-self: center; }
.self-stretch { align-self: stretch; }

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dark);
}

/* Cross-browser compatibility */
*, *::before, *::after {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Better touch targets */
.btn, .nav-link, .theme-toggle, .mobile-menu-btn {
    min-height: 44px;
    min-width: 44px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* Smooth scrolling for all browsers */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

/* Better focus styles */
.btn:focus-visible,
.nav-link:focus-visible,
.theme-toggle:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Better image rendering */
img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    image-rendering: pixelated;
}

@supports (image-rendering: -webkit-optimize-contrast) {
    img {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* Better text rendering */
body {
    text-rendering: optimizeLegibility;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
/* Responsive Design */
@media (max-width: 1024px) {
  .container {
    padding: 0 clamp(1rem, 3vw, 2rem);
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
  }
  
  .hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
  }
}

@media (max-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .md\:grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
  
  .md\:hidden {
    display: none;
  }
  
  .section {
    padding: var(--spacing-12) 0;
  }
  
  h1 {
    font-size: var(--font-size-4xl);
  }
  
  h2 {
    font-size: var(--font-size-3xl);
  }
  
  h3 {
    font-size: var(--font-size-2xl);
  }
}

@media (max-width: 640px) {
  .sm\:grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
  
  .sm\:hidden {
    display: none;
  }
  
  .container {
    padding: 0 var(--spacing-4);
  }
  
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  h2 {
    font-size: var(--font-size-2xl);
  }
  
  h3 {
    font-size: var(--font-size-xl);
  }
}

/* Print Styles */
@media print {
  body {
    background: white;
    color: black;
    font-size: 12pt;
  }
  
  .no-print {
    display: none !important;
  }
  
  a {
    text-decoration: underline;
  }
  
  a[href^='http']::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    font-weight: normal;
  }
}