/* ===================================
   BASE STYLES & DESIGN TOKENS
   =================================== */

/* CSS Custom Properties - Design Tokens */
:root {
  /* Colors - Primary Palette */
  --color-primary-50: #f8fafc;
  --color-primary-100: #f1f5f9;
  --color-primary-200: #e2e8f0;
  --color-primary-300: #cbd5e1;
  --color-primary-400: #94a3b8;
  --color-primary-500: #64748b;
  --color-primary-600: #475569;
  --color-primary-700: #334155;
  --color-primary-800: #1e293b;
  --color-primary-900: #0f172a;
  
  /* Colors - Accent Palette */
  --color-accent-50: #fef7ee;
  --color-accent-100: #fdedd4;
  --color-accent-200: #fbd7a9;
  --color-accent-300: #f8bb73;
  --color-accent-400: #f5953a;
  --color-accent-500: #f2741f;
  --color-accent-600: #e35a13;
  --color-accent-700: #bc4512;
  --color-accent-800: #953815;
  --color-accent-900: #7a2f16;
  
  /* Colors - Semantic */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Colors - Neutral */
  --color-white: #ffffff;
  --color-black: #000000;
  --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;
  
  /* Typography - High-Class Font Stack */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  /* Font Sizes - Refined Scale */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  --text-7xl: 4.5rem;      /* 72px */
  --text-8xl: 6rem;        /* 96px */
  --text-9xl: 8rem;        /* 128px */
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  --font-black: 900;
  
  /* Line Heights - Refined for Readability */
  --leading-none: 1;
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0em;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;
  
  /* Spacing */
  --space-0: 0;
  --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 */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;   /* 2px */
  --radius-base: 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;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 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);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  --transition-slower: 500ms ease-in-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 5rem;
  --sidebar-width: 16rem;
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary-50: #0f172a;
    --color-primary-100: #1e293b;
    --color-primary-200: #334155;
    --color-primary-300: #475569;
    --color-primary-400: #64748b;
    --color-primary-500: #94a3b8;
    --color-primary-600: #cbd5e1;
    --color-primary-700: #e2e8f0;
    --color-primary-800: #f1f5f9;
    --color-primary-900: #f8fafc;
  }
}

/* ===================================
   RESET & BASE STYLES
   =================================== */

/* Modern CSS Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Remove default margin and padding */
html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
  display: block;
}

/* Set core body defaults */
body {
  min-height: 100vh;
  scroll-behavior: smooth;
  text-rendering: optimizeSpeed;
  line-height: var(--leading-normal);
  font-family: var(--font-family-primary);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}

/* Make images easier to work with */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Remove built-in form typography styles */
input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* Avoid text overflows */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* Create a root stacking context */
#root,
#__next {
  isolation: isolate;
}

/* ===================================
   TYPOGRAPHY - HIGH-CLASS SYSTEM
   =================================== */

/* Display Typography - For Hero Sections and Major Headlines */
.display-1 {
  font-family: var(--font-family-display);
  font-size: var(--text-7xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

.display-2 {
  font-family: var(--font-family-display);
  font-size: var(--text-6xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

.display-3 {
  font-family: var(--font-family-display);
  font-size: var(--text-5xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

.display-4 {
  font-family: var(--font-family-display);
  font-size: var(--text-4xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

/* Headings - Refined Hierarchy */
h1, .h1 {
  font-family: var(--font-family-display);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

h2, .h2 {
  font-family: var(--font-family-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

h3, .h3 {
  font-family: var(--font-family-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--color-gray-900);
}

h4, .h4 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-normal);
  color: var(--color-gray-900);
}

h5, .h5 {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-normal);
  color: var(--color-gray-900);
}

h6, .h6 {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  color: var(--color-gray-900);
}

/* Body Text - Optimized for Readability */
p {
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-700);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  letter-spacing: var(--tracking-normal);
}

.lead {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-600);
  font-weight: var(--font-normal);
}

.text-sm {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.text-xs {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

/* Links */
a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: var(--transition-base);
  font-weight: var(--font-medium);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

/* Lists */
ul,
ol {
  list-style: none;
  margin-bottom: var(--space-4);
}

li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-relaxed);
}

/* ===================================
   UTILITY CLASSES
   =================================== */

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus styles for accessibility */
.focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* Typography Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.tracking-tight { letter-spacing: var(--tracking-tight); }
.tracking-normal { letter-spacing: var(--tracking-normal); }
.tracking-wide { letter-spacing: var(--tracking-wide); }

.leading-none { line-height: var(--leading-none); }
.leading-tight { line-height: var(--leading-tight); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInFromBottom {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Animation classes */
.animate-fade-in {
  animation: fadeIn 0.6s ease-out;
}

.animate-slide-in {
  animation: slideInFromBottom 0.8s ease-out;
}

.animate-scale-in {
  animation: scaleIn 0.8s ease-out;
}

/* ===================================
   RESPONSIVE UTILITIES
   =================================== */

/* Hide elements on different screen sizes */
@media (max-width: 640px) {
  .sm\:hidden {
    display: none;
  }
}

@media (max-width: 768px) {
  .md\:hidden {
    display: none;
  }
}

@media (max-width: 1024px) {
  .lg\:hidden {
    display: none;
  }
}

/* Show elements on different screen sizes */
@media (min-width: 640px) {
  .sm\:block {
    display: block;
  }
}

@media (min-width: 768px) {
  .md\:block {
    display: block;
  }
}

@media (min-width: 1024px) {
  .lg\:block {
    display: block;
  }
}