/* Design Token System */
:root {
  /* Color Tokens */
  --color-primary-100: #f0f9ff;
  --color-primary-500: #3b82f6;
  --color-primary-900: #1e3a8a;
  
  --color-secondary-100: #f3f4f6;
  --color-secondary-500: #6b7280;
  --color-secondary-900: #111827;
  
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Typography Tokens */
  --font-family-primary: 'Inter', system-ui, sans-serif;
  --font-family-secondary: 'JetBrains 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 */
  
  /* Spacing Tokens */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  
  /* Shadow Tokens */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  
  /* Transition Tokens */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
}

/* Dark Theme Tokens */
[data-theme="dark"] {
  --color-primary-100: #1e3a8a;
  --color-primary-500: #60a5fa;
  --color-primary-900: #dbeafe;
  
  --color-secondary-100: #111827;
  --color-secondary-500: #9ca3af;
  --color-secondary-900: #f9fafb;
}

/* Base Component Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-primary);
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  
  &:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
  }
  
  &:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
  }
}

.btn--primary {
  background-color: var(--color-primary-500);
  color: white;
  
  &:hover:not(:disabled) {
    background-color: var(--color-primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }
}

.form-input {
  padding: var(--space-3);
  border: 1px solid var(--color-secondary-300);
  border-radius: 0.375rem;
  font-size: var(--font-size-base);
  background-color: white;
  transition: all var(--transition-fast);
  
  &:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
  }
}

.card {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-secondary-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
  
  &:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }
}

/* Mobile First Approach */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

/* Small devices (640px and up) */
@media (min-width: 640px) {
  .container { max-width: 640px; }
  .sm\\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

/* Medium devices (768px and up) */
@media (min-width: 768px) {
  .container { max-width: 768px; }
  .md\\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* Large devices (1024px and up) */
@media (min-width: 1024px) {
  .container { 
    max-width: 1024px;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
  .lg\\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Extra large devices (1280px and up) */
@media (min-width: 1280px) {
  .container { 
    max-width: 1280px;
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

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