/* Design System - 2025 Edition */

:root {
  /* Color System */
  --color-primary: #2563eb;
  --color-primary-light: #60a5fa;
  --color-primary-dark: #1e40af;
  
  --color-secondary: #9333ea;
  --color-secondary-light: #c084fc;
  --color-secondary-dark: #6b21a8;
  
  --color-success: #059669;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --color-info: #0891b2;

  /* Neutral Colors */
  --color-background: #ffffff;
  --color-surface: #f8fafc;
  --color-overlay: rgba(0, 0, 0, 0.5);
  
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94a3b8;
  --color-text-inverse: #ffffff;

  /* Border Colors */
  --color-border: #e2e8f0;
  --color-border-focus: #60a5fa;

  /* Spacing System */
  --space-2xs: 0.25rem;  /* 4px */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 0.75rem;   /* 12px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */

  /* Typography */
  --font-family-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-mono: 'JetBrains Mono', monospace;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 2rem;     /* 32px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 100ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 200ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Enhanced Performance */
  --gpu-transform: translate3d(0, 0, 0);
  --gpu-visibility: opacity;

  /* Z-index */
  --z-negative: -1;
  --z-elevate: 1;
  --z-sticky: 100;
  --z-drawer: 200;
  --z-modal: 300;
  --z-popover: 400;
  --z-toast: 500;
}

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

html {
  font-family: var(--font-family-sans);
  font-size: 16px;
  line-height: var(--line-height-normal);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  background-color: var(--color-background);
  color: var(--color-text-primary);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

/* Base Components */

/* Button Base */
button,
.btn,
[class*="btn-"] {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: var(--space-md) !important;
  padding: var(--space-sm) var(--space-lg) !important;
  border-radius: var(--radius-md) !important;
  font-weight: var(--font-weight-medium) !important;
  font-size: var(--font-size-sm) !important;
  line-height: var(--line-height-tight) !important;
  transition: all var(--transition-fast) !important;
  cursor: pointer !important;
  border: none !important;
  outline: none !important;
}

/* Button Spacing */
.flex button + button,
.flex .btn + .btn,
.flex [class*="btn-"] + [class*="btn-"] {
  margin-left: var(--space-lg) !important;
}

/* Button Icons */
button i,
button .fas,
button .fa,
.btn i,
.btn .fas,
.btn .fa,
[class*="btn-"] i,
[class*="btn-"] .fas,
[class*="btn-"] .fa {
  line-height: 1 !important;
  font-size: inherit !important;
}

/* Button Variants */
.btn-primary {
  background-color: var(--color-primary) !important;
  color: var(--color-text-inverse) !important;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark) !important;
}

.btn-secondary {
  background-color: var(--color-secondary) !important;
  color: var(--color-text-inverse) !important;
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark) !important;
}

.btn-cancel {
  background-color: var(--color-error) !important;
  color: var(--color-text-inverse) !important;
}

.btn-cancel:hover {
  background-color: #a71d1d !important;
}


/* Form Controls */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-border-focus);
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* Cards */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Containers */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

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

@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-cols-3, .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-cols-2, .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Spacing Utilities */
.m-0 { margin: 0; }
.mt-md { margin-top: var(--space-md); }
.mb-md { margin-bottom: var(--space-md); }
.my-md { margin-top: var(--space-md); margin-bottom: var(--space-md); }
.p-md { padding: var(--space-md); }

/* Text Utilities */
.text-sm { font-size: var(--font-size-sm); }
.text-md { font-size: var(--font-size-md); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

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

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }

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

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

.animate-fade-in {
  animation: fadeIn var(--transition-normal) forwards;
}

.animate-slide-up {
  animation: slideUp var(--transition-normal) forwards;
}